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<element>: The Custom Element element (Obsolete) - HTML: Hypertext Markup Language
Web › HTML › Element › element
the obsolete html <element> element was part of the web components specification; it was intended to be used to define new custom dom elements.
... it was removed in favor of a javascript-driven approach for creating new custom elements.
... note: this element has been removed from the specification.
...And 4 more matches
Element.getElementsByTagName() - Web APIs
Web › API › Element › getElementsByTagName
the element.getelementsbytagname() method returns a live htmlcollection of elements with the given tag name.
... all descendants of the specified element are searched, but not the element itself.
...therefore, there is no need to call element.getelementsbytagname() with the same element and arguments repeatedly if the dom changes in between calls.
...And 13 more matches
Element.getElementsByClassName() - Web APIs
Web › API › Element › getElementsByClassName
the element method getelementsbyclassname() returns a live htmlcollection which contains every descendant element which has the specified class name or names.
... the method getelementsbyclassname() on the document interface works essentially the same way, except it acts on the entire document, starting at the document root.
... syntax var elements = element.getelementsbyclassname(names); parameters names a domstring containing one or more class names to match on, separated by whitespace.
...And 10 more matches
Element.insertAdjacentElement() - Web APIs
Web › API › Element › insertAdjacentElement
the insertadjacentelement() method of the element interface inserts a given element node at a given position relative to the element it is invoked upon.
... syntax targetelement.insertadjacentelement(position, element); parameters position a domstring representing the position relative to the targetelement; must match (case-insensitively) one of the following strings: 'beforebegin': before the targetelement itself.
... 'afterbegin': just inside the targetelement, before its first child.
...And 9 more matches
Element.getElementsByTagNameNS() - Web APIs
Web › API › Element › getElementsByTagNameNS
the element.getelementsbytagnamens() method returns a live htmlcollection of elements with the given tag name belonging to the given namespace.
... it is similar to document.getelementsbytagnamens, except that its search is restricted to descendants of the specified element.
... syntax elements = element.getelementsbytagnamens(namespaceuri, localname) elements is a live htmlcollection of found elements in the order they appear in the tree.
...And 8 more matches
HTMLFormElement.elements - Web APIs
Web › API › HTMLFormElement › elements
the htmlformelement property elements returns an htmlformcontrolscollection listing all the form controls contained in the <form> element.
... you can access a particular form control in the returned collection by using either an index or the element's name or id.
... syntax nodelist = htmlformelement.elements value an htmlformcontrolscollection containing all non-image controls in the form.
...And 4 more matches
HTMLSlotElement.assignedElements() - Web APIs
Web › API › HTMLSlotElement › assignedElements
the assignedelements() property of the htmlslotelement interface returns a sequence of the elements assigned to this slot (and no other nodes).
... if the flatten option is set to true, it also returns the assigned elements of any other slots that are descendants of this slot.
... syntax var assignedelements = htmlslotelement.assignedelements(options) parameters options optional an object that sets options for the nodes to be returned.
...And 4 more matches
CSSPseudoElement.element - Web APIs
Web › API › CSSPseudoElement › element
the element read-only property of the csspseudoelement interface returns a reference to the originating element of the pseudo-element, in other words its parent element.
... syntax var originatingelement = csspseudoelement.element; value an element representing the pseudo-element's originating element.
... examples the example below demonstrates the relationship between csspseudoelement.element and element.pseudo(): const myelement = document.queryselector('q'); const csspseudoelement = myelement.pseudo('::after'); const originatingelement = csspseudoelement.element; console.log(myelement === originatingelement); // outputs true console.log(myelement.parentelement === originatingelement); // outputs false console.log(myelement.lastelementchild === csspseudoelement); // outputs false console.log(myelement.lastchild === csspseudoelement); // outputs false console.log(myelement.nextelementsibling === csspseudoelement); // outputs false console.log(myelement.nextsibling === csspseudoelement); // outputs false specifications specification status ...
... comment css pseudo-elements level 4the definition of 'element' in that specification.
MediaElementAudioSourceNode.mediaElement - Web APIs
Web › API › MediaElementAudioSourceNode › mediaElement
the mediaelementaudiosourcenode interface's read-only mediaelement property indicates the htmlmediaelement that contains the audio track from which the node is receiving audio.
... this stream was specified when the node was first created, either using the mediaelementaudiosourcenode() constructor or the audiocontext.createmediaelementsource() method.
... syntax audiosourceelement = mediaelementaudiosourcenode.mediaelement; value an htmlmediaelement representing the element which contains the source of audio for the node.
... examples const audioctx = new window.audiocontext(); const audioelem = document.queryselector('audio'); let options = { mediaelement: audioelem } let source = new mediaelementaudiosourcenode(audioctx, options); console.log(source.mediaelement); specifications specification status comment web audio apithe definition of 'mediaelementaudiosourcenode.mediaelement' in that specification.
HTML elements reference - HTML: Hypertext Markup Language
Web › HTML › Element
this page lists all the html elements, which are created using tags.
...an alphabetical list of all elements is provided in the sidebar on every element's page as well as this one.
... for more information about the basics of html elements and attributes, see the section on elements in the introduction to html article.
...And 173 more matches
Element - Web APIs
Web › API › Element
element is the most general base class from which all element objects (i.e.
... objects that represent elements) in a document inherit.
... it only has methods and properties common to all kinds of elements.
...And 127 more matches
XUL element attributes - Archive of obsolete content
Archive › Mozilla › XUL › XUL Reference › XUL element attributes
« xul reference home the following attributes are common to all xul elements: align type: one of the values below the align attribute specifies how child elements of the box are aligned, when the size of the box is larger than the total size of the children.
... start child elements are aligned starting from the left or top edge of the box.
... center extra space is split equally along each side of the child elements, resulting in the children being placed in the center of the box.
...And 97 more matches
<input>: The Input (Form Input) element - HTML: Hypertext Markup Language
Web › HTML › Element › input
the html <input> element is used to create interactive controls for web-based forms in order to accept data from the user; a wide variety of types of input data and control widgets are available, depending on the device and user agent.
... the <input> element is one of the most powerful and complex in all of html due to the sheer number of combinations of input types and attributes.
... <input type="datetime" name="datetime"/> html5 attributes the <input> element is so powerful because of its attributes; the type attribute, described with examples above, being the most important.
...And 81 more matches
Pseudo-classes and pseudo-elements - Learn web development
Learn › CSS › Building blocks › Selectors › Pseudo-classes and pseudo-elements
previous overview: building blocks next the next set of selectors we will look at are referred to as pseudo-classes and pseudo-elements.
... prerequisites: basic computer literacy, basic software installed, basic knowledge of working with files, html basics (study introduction to html), and an idea of how css works (study css first steps.) objective: to learn about the pseudo-class and pseudo-element selectors.
... a pseudo-class is a selector that selects elements that are in a specific state, e.g.
...And 75 more matches
HTMLMediaElement - Web APIs
Web › API › HTMLMediaElement
the htmlmediaelement interface adds to htmlelement the properties and methods needed to support basic media-related capabilities that are common to audio and video.
... the htmlvideoelement and htmlaudioelement elements both inherit this interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 69 more matches
HTMLInputElement - Web APIs
Web › API › HTMLInputElement
the htmlinputelement interface provides special properties and methods for manipulating the options, layout, and presentation of <input> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlinputelement" target="_top"><rect x="331" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-f...
...And 65 more matches
Elements - Archive of obsolete content
Archive › Mozilla › XBL › XBL 1.0 Reference › Elements
<!element bindings ( binding* ) > hierarchy: root element may contain: <binding> the bindings element is the root element of any xbl document.
... bindings contains zero or more binding elements as children.
... each binding child element defines a unique binding that can be attached to elements in other documents.
...And 58 more matches
HTMLElement - Web APIs
Web › API › HTMLElement
the htmlelement interface represents any html element.
... some elements directly implement this interface, while others implement it via an interface that inherits it.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 58 more matches
SVGSVGElement - Web APIs
Web › API › SVGSVGElement
the svgsvgelement interface provides access to the properties of <svg> elements, as well as methods to manipulate them.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 57 more matches
Using custom elements - Web Components
Web › Web Components › Using custom elements
one of the key features of the web components standard is the ability to create custom elements that encapsulate your functionality on an html page, rather than having to make do with a long, nested batch of elements that together provide a custom page feature.
... this article introduces the use of the custom elements api.
... note: custom elements are supported by default in firefox, chrome, and edge (76).
...And 52 more matches
Element Positioning - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Element Positioning
« previousnext » here we'll look at controlling the position and size of an element.
... box element positioning so far, we know how to position elements either horizontally or vertically inside a box.
... we will often need more control over the position and size of elements within the box.
...And 46 more matches
Timing element visibility with the Intersection Observer API - Web APIs
Web › API › Intersection Observer API › Timing element visibility
the intersection observer api makes it easy to be asynchronously notified when elements of interest become more or less obscured by a shared ancestor node or element, including the document itself.
...we start with an empty <main> element here.
... the basics we provide styles for the <body> and <main> elements to define the site's background as well as the grid the various parts of the site will be placed in.
...And 46 more matches
HTMLSelectElement - Web APIs
Web › API › HTMLSelectElement
the htmlselectelement interface represents a <select> html element.
... these elements also share all of the properties and methods of other html elements via the htmlelement interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 45 more matches
nsIDOMXULElement
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMXULElement
dom/interfaces/xul/nsidomxulelement.idlscriptable represents a xul element within the dom.
... 66 introduced gecko 1.0 inherits from: nsidomelement last changed in gecko 1.9 (firefox 3) method overview void blur(); void click(); void docommand(); void focus(); nsidomnodelist getelementsbyattribute(in domstring name, in domstring value); nsidomnodelist getelementsbyattributens(in domstring namespaceuri, in domstring name, in domstring value); attributes attribute type description align domstring gets/sets the value of the element's align attribute.
... allowevents boolean true if the element's allowevents attribute is the string "true", otherwise false.
...And 42 more matches
HTMLImageElement - Web APIs
Web › API › HTMLImageElement
the htmlimageelement interface represents an html <img> element, providing the properties and methods used to manipulate image elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlimageelement" target="_top"><rect x="331" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-f...
...And 42 more matches
Adding Methods to XBL-defined Elements - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Adding Methods to XBL-defined Elements
« previousnext » next, we'll find out how to add custom methods to xbl-defined elements.
... methods in addition to adding script properties to the xbl-defined element, you can also add methods.
...you can define custom methods for your elements using the method element.
...And 41 more matches
HTMLAnchorElement - Web APIs
Web › API › HTMLAnchorElement
the htmlanchorelement interface represents hyperlink elements and provides special properties and methods (beyond those of the regular htmlelement object interface that they inherit from) for manipulating the layout and presentation of such elements.
... this interface corresponds to <a> element; not to be confused with <link>, which is represented by htmllinkelement) <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 20%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 120" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/eventtarget" target="_top"><rect x="1" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="56" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">eventtarget</text></a><polyline points="111,25 121,20 121,30 111,25" stroke="#d4dde4" fill="n...
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 41 more matches
HTMLTableElement - Web APIs
Web › API › HTMLTableElement
the htmltableelement interface provides special properties and methods (beyond the regular htmlelement object interface it also has available to it by inheritance) for manipulating the layout and presentation of tables in an html document.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmltableelement" target="_top"><rect x="331" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-f...
...And 38 more matches
HTMLButtonElement - Web APIs
Web › API › HTMLButtonElement
the htmlbuttonelement interface provides properties and methods (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating <button> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlbuttonelement" target="_top"><rect x="321" y="65" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="406" y="94" font-size="12px" font-...
...And 37 more matches
Custom XUL Elements with XBL - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › Custom XUL Elements with XBL
« previousnext » xml binding language (xbl, sometimes also called extensible bindings language) is a language for describing bindings that can be attached to elements in other documents.
... the element that the binding is attached to, called the bound element, acquires the new behavior specified by the binding.
... this somewhat cryptic explanation describes a very simple concept: with xbl you can create your own custom elements.
...And 36 more matches
HTMLAreaElement - Web APIs
Web › API › HTMLAreaElement
the htmlareaelement interface provides special properties and methods (beyond those of the regular object htmlelement interface it also has available to it by inheritance) for manipulating the layout and presentation of <area> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlareaelement" target="_top"><rect x="341" y="65" width="150" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="416" y="94" font-size="12px" font-fa...
...And 35 more matches
HTMLObjectElement - Web APIs
Web › API › HTMLObjectElement
the htmlobjectelement interface provides special properties and methods (beyond those on the htmlelement interface it also has available to it by inheritance) for manipulating the layout and presentation of <object> element, representing external resources.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlobjectelement" target="_top"><rect x="321" y="65" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="406" y="94" font-size="12px" font-...
...And 35 more matches
<audio>: The Embed Audio element - HTML: Hypertext Markup Language
Web › HTML › Element › audio
the html <audio> element is used to embed sound content in documents.
... it may contain one or more audio sources, represented using the src attribute or the <source> element: the browser will choose the most suitable one.
... the above example shows simple usage of the <audio> element.
...And 35 more matches
HTMLFormElement - Web APIs
Web › API › HTMLFormElement
the htmlformelement interface represents a <form> element in the dom.
... it allows access to—and, in some cases, modification of—aspects of the form, as well as access to its component elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 33 more matches
HTMLTextAreaElement - Web APIs
Web › API › HTMLTextAreaElement
the htmltextareaelement interface provides special properties and methods for manipulating the layout and presentation of <textarea> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmltextareaelement" target="_top"><rect x="301" y="65" width="190" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" fon...
...And 33 more matches
SVGPathElement - Web APIs
Web › API › SVGPathElement
the svgpathelement interface corresponds to the <path> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 33 more matches
<video>: The Video Embed element - HTML: Hypertext Markup Language
Web › HTML › Element › video
the html video element (<video>) embeds a media player which supports video playback into the document.
... you can use <video> for audio content as well, but the <audio> element may provide a more appropriate user experience.
... the above example shows simple usage of the <video> element.
...And 33 more matches
Applying color to HTML elements using CSS - HTML: Hypertext Markup Language
Web › HTML › Applying color
with css, there are lots of ways to add color to your html elements to create just the look you want.
... things that can have color at the element level, everything in html can have color applied to it.
... instead, let's look at things in terms of the kinds of things that are drawn in the elements, such as text and borders and so forth.
...And 30 more matches
HTMLOutputElement - Web APIs
Web › API › HTMLOutputElement
the htmloutputelement interface provides properties and methods (beyond those inherited from htmlelement) for manipulating the layout and presentation of <output> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmloutputelement" target="_top"><rect x="321" y="65" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="406" y="94" font-size="12px" font-...
...And 29 more matches
HTMLIFrameElement - Web APIs
Web › API › HTMLIFrameElement
the htmliframeelement interface provides special properties and methods (beyond those of the htmlelement interface it also has available to it by inheritance) for manipulating the layout and presentation of inline frame elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmliframeelement" target="_top"><rect x="321" y="65" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="406" y="94" font-size="12px" font-...
...And 27 more matches
Images, media, and form elements - Learn web development
Learn › CSS › Building blocks › Images media form elements
previous overview: building blocks next in this lesson we will take a look at how certain special elements are treated in css.
... images, other media, and form elements behave a little differently in terms of your ability to style them with css than regular boxes.
... prerequisites: basic computer literacy, basic software installed, basic knowledge of working with files, html basics (study introduction to html), and an idea of how css works (study css first steps.) objective: to understand the way that some elements behave unusually when styled with css.
...And 24 more matches
<select>: The HTML Select element - HTML: Hypertext Markup Language
Web › HTML › Element › select
the html <select> element represents a control that provides a menu of options: the source for this interactive example is stored in a github repository.
...each menu option is defined by an <option> element nested inside the <select>.
... each <option> element should have a value attribute containing the data value to submit to the server when that option is selected.
...And 24 more matches
HTMLLinkElement - Web APIs
Web › API › HTMLLinkElement
the htmllinkelement interface represents reference information for external resources and the relationship of those resources to a document and vice-versa (corresponds to <link> element; not to be confused with <a>, which is represented by htmlanchorelement).
... this object inherits all of the properties and methods of the htmlelement interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 23 more matches
HTMLTableCellElement - Web APIs
Web › API › HTMLTableCellElement
the htmltablecellelement interface provides special properties and methods (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating the layout and presentation of table cells, either header or data cells, in an html document.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmltablecellelement" target="_top"><rect x="291" y="65" width="200" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" fo...
...And 23 more matches
HTMLVideoElement - Web APIs
Web › API › HTMLVideoElement
the htmlvideoelement interface provides special properties and methods for manipulating video objects.
... it also inherits properties and methods of htmlmediaelement and htmlelement.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 23 more matches
HTMLFieldSetElement - Web APIs
Web › API › HTMLFieldSetElement
the htmlfieldsetelement interface provides special properties and methods (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating the layout and presentation of <fieldset> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlfieldsetelement" target="_top"><rect x="301" y="65" width="190" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" fon...
...And 21 more matches
HTMLMarqueeElement - Web APIs
Web › API › HTMLMarqueeElement
the htmlmarqueeelement interface provides methods to manipulate <marquee> elements.
... it inherits properties and methods from the htmlelement interface.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 11.666666666666666%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 70" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/htmlmarqueeelement" target="_top"><rect x="1" y="1" width="180" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="91" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlmarqueeelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties inherits properties from its parent, htmlelement.
...And 21 more matches
<img>: The Image Embed element - HTML: Hypertext Markup Language
Web › HTML › Element › img
the html <img> element embeds an image into the document.
... the above example shows usage of the <img> element: the src attribute is required, and contains the path to the image you want to embed.
... responsive image hints with sizes and srcset (see also the <picture> element and our responsive images tutorial).
...And 21 more matches
Adding Properties to XBL-defined Elements - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Adding Properties to XBL-defined Elements
« previousnext » next, we'll find out how to add custom properties to xbl-defined elements.
... the xbl interface javascript and the dom provide access to get and set the properties of elements.
... with xbl, you can define your own properties for the elements you create.
...And 20 more matches
Adding HTML Elements - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Adding HTML Elements
« previousnext » now that we've added some buttons, let's add some other elements.
... adding html elements to a window in addition to all of the xul elements that are available, you can also add html elements directly within a xul file.
... you can actually use any html element in a xul file, meaning that java applets and tables can be placed in a window.
...And 19 more matches
HTMLScriptElement - Web APIs
Web › API › HTMLScriptElement
html <script> elements expose the htmlscriptelement interface, which provides special properties and methods for manipulating the behavior and execution of <script> elements (beyond the inherited htmlelement interface).
...if the script is blocked, its element receives an error event; otherwise, it receives a load event.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 19 more matches
HTMLOptionElement - Web APIs
Web › API › HTMLOptionElement
the htmloptionelement interface represents <option> elements and inherits all classes and methods of the htmlelement interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmloptionelement" target="_top"><rect x="321" y="65" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="406" y="94" font-size="12px" font-...
...And 18 more matches
HTMLTableRowElement - Web APIs
Web › API › HTMLTableRowElement
the htmltablerowelement interface provides special properties and methods (beyond the htmlelement interface it also has available to it by inheritance) for manipulating the layout and presentation of rows in an html table.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmltablerowelement" target="_top"><rect x="301" y="65" width="190" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" fon...
...And 18 more matches
SVGAnimationElement - Web APIs
Web › API › SVGAnimationElement
the svganimationelement interface is the base interface for all of the animation element interfaces: svganimateelement, svgsetelement, svganimatecolorelement, svganimatemotionelement and svganimatetransformelement.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svganimationelement" target="_top"><rect x="291" y="65" width="190" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="386" y="94" font-size="12px" font-...
...And 18 more matches
SVGTextContentElement - Web APIs
Web › API › SVGTextContentElement
the svgtextcontentelement interface is implemented by elements that support rendering child text content.
... it is inherited by various text-related interfaces, such as svgtextelement, svgtspanelement, svgtrefelement, svgaltglyphelement and svgtextpathelement.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 18 more matches
<link>: The External Resource Link element - HTML: Hypertext Markup Language
Web › HTML › Element › link
the html external resource link element (<link>) specifies relationships between the current document and an external resource.
... this element is most commonly used to link to stylesheets, but is also used to establish site icons (both "favicon" style icons and icons for the home screen and apps on mobile devices) among other things.
... to link an external stylesheet, you'd include a <link> element inside your <head> like this: <link href="main.css" rel="stylesheet"> this simple example provides the path to the stylesheet inside an href attribute, and a rel attribute with a value of stylesheet.
...And 18 more matches
CustomElementRegistry.define() - Web APIs
Web › API › CustomElementRegistry › define
the define() method of the customelementregistry interface defines a new custom element.
... there are two types of custom elements you can create: autonomous custom element: standalone elements; they don't inherit from built-in html elements.
... customized built-in element: these elements inherit from — and extend — built-in html elements.
...And 17 more matches
SVGFEConvolveMatrixElement - Web APIs
Web › API › SVGFEConvolveMatrixElement
the svgfeconvolvematrixelement interface corresponds to the <feconvolvematrix> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfeconvolvematrixelement" target="_top"><rect x="221" y="65" width="260" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="351" y="94" font-size="12px...
...And 17 more matches
HTMLCanvasElement - Web APIs
Web › API › HTMLCanvasElement
the htmlcanvaselement interface provides properties and methods for manipulating the layout and presentation of <canvas> elements.
... the htmlcanvaselement interface also inherits the properties and methods of the htmlelement interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 16 more matches
<dfn>: The Definition element - HTML: Hypertext Markup Language
Web › HTML › Element › dfn
the html definition element (<dfn>) is used to indicate the term being defined within the context of a definition phrase or sentence.
... the <p> element, the <dt>/<dd> pairing, or the <section> element which is the nearest ancestor of the <dfn> is considered to be the definition of the term.
... permitted content phrasing content, but no <dfn> element must be a descendant.
...And 16 more matches
HTMLBodyElement - Web APIs
Web › API › HTMLBodyElement
the htmlbodyelement interface provides special properties (beyond those inherited from the regular htmlelement interface) for manipulating <body> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlbodyelement" target="_top"><rect x="341" y="65" width="150" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="416" y="94" font-size="12px" font-fa...
...And 15 more matches
element() - CSS: Cascading Style Sheets
Web › CSS › element
the element() css function defines an <image> value generated from an arbitrary html element.
... this image is live, meaning that if the html element is changed, the css properties using the resulting value are automatically updated.
... a particularly useful scenario for using this would be to render an image in an html <canvas> element, then use that as a background.
...And 15 more matches
<source>: The Media or Image Source element - HTML: Hypertext Markup Language
Web › HTML › Element › source
the html <source> element specifies multiple media resources for the <picture>, the <audio> element, or the <video> element.
... it is an empty element, meaning that it has no content and does not have a closing tag.
... permitted content none, it is an empty element.
...And 15 more matches
Inline elements - HTML: Hypertext Markup Language
Web › HTML › Inline elements
html (hypertext markup language) elements historically were categorized as either "block-level" elements or "inline-level" elements.
... inline elements are those which only occupy the space bounded by the tags defining the element, instead of breaking the flow of the content.
... in this article, we'll examine html inline-level elements and how they differ from block-level elements.
...And 15 more matches
Element.classList - Web APIs
Web › API › Element › classList
the element.classlist is a read-only property that returns a live domtokenlist collection of the class attributes of the element.
... using classlist is a convenient alternative to accessing an element's list of classes as a space-delimited string via element.classname.
... syntax const elementclasses = elementnodereference.classlist; returns a domtokenlist representing the contents of the element's class attribute.
...And 14 more matches
Element.requestFullscreen() - Web APIs
Web › API › Element › requestFullScreen
the element.requestfullscreen() method issues an asynchronous request to make the element be displayed in full-screen mode.
... it's not guaranteed that the element will be put into full screen mode.
... if permission to enter full screen mode is granted, the returned promise will resolve and the element will receive a fullscreenchange event to let it know that it's now in full screen mode.
...And 14 more matches
HTMLTableSectionElement - Web APIs
Web › API › HTMLTableSectionElement
the htmltablesectionelement interface provides special properties and methods (beyond the htmlelement interface it also has available to it by inheritance) for manipulating the layout and presentation of sections, that is headers, footers and bodies, in an html table.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmltablesectionelement" target="_top"><rect x="261" y="65" width="230" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="376" y="94" font-size="12px"...
...And 14 more matches
HTMLTrackElement - Web APIs
Web › API › HTMLTrackElement
the htmltrackelement interface represents an html <track> element within the dom.
... this element can be used as a child of either <audio> or <video> to specify a text track containing information such as closed captions or subtitles.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 14 more matches
SVGCircleElement - Web APIs
Web › API › SVGCircleElement
the svgcircleelement interface is an interface for the <circle> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 14 more matches
SVGElement - Web APIs
Web › API › SVGElement
all of the svg dom interfaces that correspond directly to elements in the svg language derive from the svgelement interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties also inherits properties from: documentandelementeventhandlers, element, elementcssinlinestyle, globaleventhandlers, htmlorforeignelement, svgelementinstance svgelement.datasetread only a domstringmap object which provides a list of key/value pairs of named data attributes which correspond to custom data attributes attached to the element.
...And 14 more matches
<picture>: The Picture element - HTML: Hypertext Markup Language
Web › HTML › Element › picture
the html <picture> element contains zero or more <source> elements and one <img> element to offer alternative versions of an image for different display/device scenarios.
... the browser will consider each child <source> element and choose the best match among them.
... if no matches are found—or the browser doesn't support the <picture> element—the url of the <img> element's src attribute is selected.
...And 14 more matches
Document.getElementById() - Web APIs
Web › API › Document › getElementById
the document method getelementbyid() returns an element object representing the element whose id property matches the specified string.
... since element ids are required to be unique if specified, they're a useful way to get access to a specific element quickly.
... if you need to get access to an element which doesn't have an id, you can use queryselector() to find the element using any selector.
...And 13 more matches
Element.innerHTML - Web APIs
Web › API › Element › innerHTML
the element property innerhtml gets or sets the html or xml markup contained within the element.
... to insert the html into the document rather than replace the contents of an element, use the method insertadjacenthtml().
... syntax const content = element.innerhtml; element.innerhtml = htmlstring; value a domstring containing the html serialization of the element's descendants.
...And 13 more matches
HTMLHyperlinkElementUtils - Web APIs
Web › API › HTMLHyperlinkElementUtils
the htmlhyperlinkelementutils mixin defines utility methods and properties to work with htmlanchorelement and htmlareaelement.
... there are no objects of this type, but several objects such as htmlanchorelement and htmlareaelement implement it.
... htmlhyperlinkelementutils.href this a stringifier property that returns a usvstring containing the whole url, and allows the href to be updated.
...And 13 more matches
SVGImageElement - Web APIs
Web › API › SVGImageElement
the svgimageelement interface corresponds to the <image> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 13 more matches
<b>: The Bring Attention To element - HTML: Hypertext Markup Language
Web › HTML › Element › b
the html bring attention to element (<b>) is used to draw the reader's attention to the element's contents, which are not otherwise granted special importance.
... this was formerly known as the boldface element, and most browsers still draw the text in boldface.
... however, you should not use <b> for styling text; instead, you should use the css font-weight property to create boldface text, or the <strong> element to indicate that text is of special importance.
...And 13 more matches
<kbd>: The Keyboard Input element - HTML: Hypertext Markup Language
Web › HTML › Element › kbd
the html keyboard input element (<kbd>) represents a span of inline text denoting textual user input from a keyboard, voice input, or any other text entry device.
... by convention, the user agent defaults to rendering the contents of a <kbd> element using its default monospace font, although this is not mandated by the html standard.
... <kbd> may be nested in various combinations with the <samp> (sample output) element to represent various forms of input or output based on visual cues.
...And 13 more matches
<tbody>: The Table Body element - HTML: Hypertext Markup Language
Web › HTML › Element › tbody
the html table body element (<tbody>) encapsulates a set of table rows (<tr> elements), indicating that they comprise the body of the table (<table>).
... the <tbody> element, along with its cousins <thead> and <tfoot>, provide useful semantic information that can be used when rendering for either screen or printer as well as for accessibility purposes.
... permitted content zero or more <tr> elements.
...And 13 more matches
JS_AliasElement
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS AliasElement
syntax jsbool js_aliaselement(jscontext *cx, jsobject *obj, const char *name, jsint alias); name type description cx jscontext * the context in which to create the alias.
... name const char * name of the element for which to create an alias.
... this name corresponds to a string representation of the element's current index number.
...And 12 more matches
Document.createElementNS() - Web APIs
Web › API › Document › createElementNS
creates an element with the specified namespace uri and qualified name.
... to create an element without specifying a namespace uri, use the createelement() method.
... syntax var element = document.createelementns(namespaceuri, qualifiedname[, options]); parameters namespaceuri a string that specifies the namespace uri to associate with the element.
...And 12 more matches
Document.getElementsByTagName() - Web APIs
Web › API › Document › getElementsByTagName
the getelementsbytagname method of document interface returns an htmlcollection of elements with the given tag name.
...the returned htmlcollection is live, meaning that it updates itself automatically to stay in sync with the dom tree without having to call document.getelementsbytagname() again.
... syntax var elements = document.getelementsbytagname(name); elements is a live htmlcollection (but see the note below) of found elements in the order they appear in the tree.
...And 12 more matches
HTMLHtmlElement - Web APIs
Web › API › HTMLHtmlElement
the htmlhtmlelement interface serves as the root node for a given html document.
... this object inherits the properties and methods described in the htmlelement interface.
... you can retrieve the htmlhtmlelement object for a given document by reading the value of the document.documentelement property.
...And 12 more matches
HTMLLabelElement - Web APIs
Web › API › HTMLLabelElement
the htmllabelelement interface gives access to properties specific to <label> elements.
... it inherits methods and properties from the base htmlelement interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 12 more matches
HTMLLegendElement - Web APIs
Web › API › HTMLLegendElement
the htmllegendelement is an interface allowing to access properties of the <legend> elements.
... it inherits properties and methods from the htmlelement interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 12 more matches
HTMLMeterElement - Web APIs
Web › API › HTMLMeterElement
the html <meter> elements expose the htmlmeterelement interface, which provides special properties and methods (beyond the htmlelement object interface they also have available to them by inheritance) for manipulating the layout and presentation of <meter> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlmeterelement" target="_top"><rect x="331" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-f...
...And 12 more matches
HTMLStyleElement - Web APIs
Web › API › HTMLStyleElement
the htmlstyleelement interface represents a <style> element.
... it inherits properties and methods from its parent, htmlelement, and from linkstyle.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 12 more matches
HTMLTableColElement - Web APIs
Web › API › HTMLTableColElement
the htmltablecolelement interface provides special properties (beyond the htmlelement interface it also has available to it inheritance) for manipulating single or grouped table column elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmltablecolelement" target="_top"><rect x="301" y="65" width="190" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" fon...
...And 12 more matches
SVGAElement - Web APIs
Web › API › SVGAElement
the svgaelement interface provides access to the properties of <a> element, as well as methods to manipulate them.
... properties this interface also inherits properties from its parent, svggraphicselement, and implements properties from svgurireference and htmlhyperlinkelementutils.
... svgaelement.download see htmlanchorelement.download.
...And 12 more matches
SVGComponentTransferFunctionElement - Web APIs
Web › API › SVGComponentTransferFunctionElement
the svgcomponenttransferfunctionelement interface defines a base interface used by the component transfer function interfaces.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgcomponenttransferfunctionelement" target="_top"><rect x="131" y="65" width="350" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="306" y="94" font-s...
...And 12 more matches
SVGFESpotLightElement - Web APIs
Web › API › SVGFESpotLightElement
the svgfespotlightelement interface corresponds to the <fespotlight> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfespotlightelement" target="_top"><rect x="271" y="65" width="210" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="376" y="94" font-size="12px" fon...
...And 12 more matches
SVGGeometryElement - Web APIs
Web › API › SVGGeometryElement
the svggeometryelement interface represents svg elements whose rendering is defined by geometry with an equivalent path, and which can be filled and stroked.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 12 more matches
SVGRectElement - Web APIs
Web › API › SVGRectElement
the svgrectelement interface provides access to the properties of <rect> elements, as well as methods to manipulate them.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 12 more matches
SVGUseElement - Web APIs
Web › API › SVGUseElement
svg use dom interface the svguseelement interface corresponds to the <use> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 12 more matches
<body>: The Document Body element - HTML: Hypertext Markup Language
Web › HTML › Element › body
the html <body> element represents the content of an html document.
... there can be only one <body> element in a document.
... tag omission the start tag may be omitted if the first thing inside it is not a space character, comment, <script> element or <style> element.
...And 12 more matches
<button>: The Button element - HTML: Hypertext Markup Language
Web › HTML › Element › button
the html <button> element represents a clickable button, used to submit forms or anywhere in a document for accessible, standard button functionality.
... content categories flow content, phrasing content, interactive content, listed, labelable, and submittable form-associated element, palpable content.
... permitted parents any element that accepts phrasing content.
...And 12 more matches
<summary>: The Disclosure Summary element - HTML: Hypertext Markup Language
Web › HTML › Element › summary
the html disclosure summary element (<summary>) element specifies a summary, caption, or legend for a <details> element's disclosure box.
... clicking the <summary> element toggles the state of the parent <details> element open and closed.
... permitted content phrasing content or one element of heading content tag omission none, both the start tag and the end tag are mandatory.
...And 12 more matches
<template>: The Content Template element - HTML: Hypertext Markup Language
Web › HTML › Element › template
the html content template (<template>) element is a mechanism for holding html that is not to be rendered immediately when a page is loaded but may be instantiated subsequently during runtime using javascript.
...while the parser does process the contents of the <template> element while loading the page, it does so only to ensure that those contents are valid; the element's contents are not rendered, however.
... content categories metadata content, flow content, phrasing content, script-supporting element permitted content no restrictions tag omission none, both the starting and ending tag are mandatory.
...And 12 more matches
<tr>: The Table Row element - HTML: Hypertext Markup Language
Web › HTML › Element › tr
the html <tr> element defines a row of cells in a table.
... the row's cells can then be established using a mix of <td> (data cell) and <th> (header cell) elements.
...we have some examples below, but for more examples and an in-depth tutorial, see the html tables series in our learn web development area, where you'll learn how to use the table elements and their attributes to get just the right layout and formatting for your tabular data.
...And 12 more matches
XForms Repeat Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Repeat
introduction a repeat element contains markup and is itself bound to a nodeset in an instance document (see the spec).
... for each node in the nodeset, the contents of the repeat element will be displayed in the form.
... number - isn't supported type restrictions the repeat element can be bound to a nodeset.
...And 11 more matches
Document.createElement() - Web APIs
Web › API › Document › createElement
in an html document, the document.createelement() method creates the html element specified by tagname, or an htmlunknownelement if tagname isn't recognized.
... syntax let element = document.createelement(tagname[, options]); parameters tagname a string that specifies the type of element to be created.
... the nodename of the created element is initialized with the value of tagname.
...And 11 more matches
Element.getClientRects() - Web APIs
Web › API › Element › getClientRects
the getclientrects() method of the element interface returns a collection of domrect objects that indicate the bounding rectangles for each css border box in a client.
... syntax let rectcollection = object.getclientrects(); return value the returned value is a collection of domrect objects, one for each css border box associated with the element.
...when called on svg elements other than an outer-<svg>, the "viewport" that the resulting rectangles are relative to is the viewport that the element's outer-<svg> establishes (and to be clear, the rectangles are also transformed by the outer-<svg>'s viewbox transform, if any).
...And 11 more matches
Element.msZoomTo() - Web APIs
Web › API › Element › msZoomTo
the mszoomto method scrolls and/or zooms an element to its specified coordinate with animation.
... zoomed elements can expose their zoom level through mscontentzoom (ie.
... syntax element.mszoomto(arguments); parameters args[in] type: mszoomtooptions contentx[in]: the x-coordinate of the content that is the target of the scroll/zoom.
...And 11 more matches
HTMLDialogElement - Web APIs
Web › API › HTMLDialogElement
the htmldialogelement interface provides methods to manipulate <dialog> elements.
... it inherits properties and methods from the htmlelement interface.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 20%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 120" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/htmldialogelement" target="_top"><rect x="1" y="1" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="86" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmldialogelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties inherits properties from its parent, htmlelement.
...And 11 more matches
HTMLEmbedElement - Web APIs
Web › API › HTMLEmbedElement
the htmlembedelement interface provides special properties (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating <embed> elements.
... this topic describes the htmlembedelement interface as defined in the standard.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 11 more matches
HTMLHRElement - Web APIs
Web › API › HTMLHRElement
the htmlhrelement interface provides special properties (beyond those of the htmlelement interface it also has available to it by inheritance) for manipulating <hr> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlhrelement" target="_top"><rect x="361" y="65" width="130" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="426" y="94" font-size="12px" font-fami...
...And 11 more matches
SVGFETurbulenceElement - Web APIs
Web › API › SVGFETurbulenceElement
the svgfeturbulenceelement interface corresponds to the <feturbulence> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfeturbulenceelement" target="_top"><rect x="261" y="65" width="220" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="371" y="94" font-size="12px" fo...
...And 11 more matches
SVGFilterElement - Web APIs
Web › API › SVGFilterElement
the svgfilterelement interface provides access to the properties of <filter> elements, as well as methods to manipulate them.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfilterelement" target="_top"><rect x="321" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="401" y="94" font-size="12px" font-fam...
...And 11 more matches
SVGPatternElement - Web APIs
Web › API › SVGPatternElement
the svgpatternelement interface corresponds to the <pattern> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgpatternelement" target="_top"><rect x="311" y="65" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" font-fa...
...And 11 more matches
SVGTextPositioningElement - Web APIs
Web › API › SVGTextPositioningElement
the svgtextpositioningelement interface is implemented by elements that support attributes that position individual text glyphs.
... it is inherited by svgtextelement, svgtspanelement, svgtrefelement and svgaltglyphelement.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 11 more matches
Replaced elements - CSS: Cascading Style Sheets
Web › CSS › Replaced element
in css, a replaced element is an element whose representation is outside the scope of css; they're external objects whose representation is independent of the css formatting model.
... put in simpler terms, they're elements whose contents are not affected by the current document's styles.
... the position of the replaced element can be affected using css, but not the contents of the replaced element itself.
...And 11 more matches
<details>: The Details disclosure element - HTML: Hypertext Markup Language
Web › HTML › Element › details
the html details element (<details>) creates a disclosure widget in which information is visible only when the widget is toggled into an "open" state.
... a summary or label can be provided using the <summary> element.
...if the first child of the <details> element is a <summary>, the contents of the <summary> element are used as the label for the disclosure widget.
...And 11 more matches
<table>: The Table element - HTML: Hypertext Markup Language
Web › HTML › Element › table
the html <table> element represents tabular data — that is, information presented in a two-dimensional table comprised of rows and columns of cells containing data.
... content categories flow content permitted content in this order: an optional <caption> element, zero or more <colgroup> elements, an optional <thead> element, either one of the following: zero or more <tbody> elements one or more <tr> elements an optional <tfoot> element tag omission none, both the starting and ending tag are mandatory.
... permitted parents any element that accepts flow content implicit aria role table permitted aria roles any dom interface htmltableelement attributes this element includes the global attributes.
...And 11 more matches
<track>: The Embed Text Track element - HTML: Hypertext Markup Language
Web › HTML › Element › track
the html <track> element is used as a child of the media elements, <audio> and <video>.
... content categories none permitted content none, it is an empty element.
... tag omission as it is a void element, the start tag must be present and the end tag must not be present.
...And 11 more matches
HTMLBaseElement - Web APIs
Web › API › HTMLBaseElement
the htmlbaseelement interface contains the base uri for a document.
... this object inherits all of the properties and methods as described in the htmlelement interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 10 more matches
HTMLLIElement - Web APIs
Web › API › HTMLLIElement
the htmllielement interface exposes specific properties and methods (beyond those defined by regular htmlelement interface it also has available to it by inheritance) for manipulating list elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmllielement" target="_top"><rect x="361" y="65" width="130" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="426" y="94" font-size="12px" font-fami...
...And 10 more matches
HTMLOListElement - Web APIs
Web › API › HTMLOListElement
the htmlolistelement interface provides special properties (beyond those defined on the regular htmlelement interface it also has available to it by inheritance) for manipulating ordered list elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlolistelement" target="_top"><rect x="331" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-f...
...And 10 more matches
HTMLParamElement - Web APIs
Web › API › HTMLParamElement
the htmlparamelement interface provides special properties (beyond those of the regular htmlelement object interface it inherits) for manipulating <param> elements, representing a pair of a key and a value that acts as a parameter for an <object> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlparamelement" target="_top"><rect x="331" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-f...
...And 10 more matches
HTMLSourceElement - Web APIs
Web › API › HTMLSourceElement
the htmlsourceelement interface provides special properties (beyond the regular htmlelement object interface it also has available to it by inheritance) for manipulating <source> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlsourceelement" target="_top"><rect x="321" y="65" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="406" y="94" font-size="12px" font-...
...And 10 more matches
SVGFEDisplacementMapElement - Web APIs
Web › API › SVGFEDisplacementMapElement
the svgfedisplacementmapelement interface corresponds to the <fedisplacementmap> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfedisplacementmapelement" target="_top"><rect x="211" y="65" width="270" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="346" y="94" font-size="12p...
...And 10 more matches
SVGFEGaussianBlurElement - Web APIs
Web › API › SVGFEGaussianBlurElement
the svgfegaussianblurelement interface corresponds to the <fegaussianblur> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfegaussianblurelement" target="_top"><rect x="241" y="65" width="240" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="361" y="94" font-size="12px" ...
...And 10 more matches
SVGFESpecularLightingElement - Web APIs
Web › API › SVGFESpecularLightingElement
the svgfespecularlightingelement interface corresponds to the <fespecularlighting> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfespecularlightingelement" target="_top"><rect x="201" y="65" width="280" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="341" y="94" font-size="12...
...And 10 more matches
SVGLineElement - Web APIs
Web › API › SVGLineElement
the svglineelement interface provides access to the properties of <line> elements, as well as methods to manipulate them.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 10 more matches
SVGMaskElement - Web APIs
Web › API › SVGMaskElement
the svgmaskelement interface provides access to the properties of <mask> elements, as well as methods to manipulate them.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgmaskelement" target="_top"><rect x="341" y="65" width="140" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-famil...
...And 10 more matches
<br>: The Line Break element - HTML: Hypertext Markup Language
Web › HTML › Element › br
the html <br> element produces a line break in text (carriage-return).
... as you can see from the above example, a <br> element is included at each point where we want the text to break.
... note: do not use <br> to create margins between paragraphs; wrap them in <p> elements and use the css margin property to control their size.
...And 10 more matches
<em>: The Emphasis element - HTML: Hypertext Markup Language
Web › HTML › Element › em
the html <em> element marks text that has stress emphasis.
... the <em> element can be nested, with each level of nesting indicating a greater degree of emphasis.
... permitted parents any element that accepts phrasing content.
...And 10 more matches
<output>: The Output element - HTML: Hypertext Markup Language
Web › HTML › Element › output
the html output element (<output>) is a container element into which a site or app can inject the results of a calculation or the outcome of a user action.
... content categories flow content, phrasing content, listed, labelable, resettable form-associated element, palpable content.
... permitted parents any element that accepts phrasing content.
...And 10 more matches
<rb>: The Ruby Base element - HTML: Hypertext Markup Language
Web › HTML › Element › rb
the html ruby base (<rb>) element is used to delimit the base text component of a <ruby> annotation, i.e.
...one <rb> element should wrap each separate atomic segment of the base text.
... permitted content as a child of a <ruby> element.
...And 10 more matches
<script>: The Script element - HTML: Hypertext Markup Language
Web › HTML › Element › script
the html <script> element is used to embed executable code or data; this is typically used to embed or refer to javascript code.
... the <script> element can also be used with other languages, such as webgl's glsl shader programming language and json.
... permitted parents any element that accepts metadata content, or any element that accepts phrasing content.
...And 10 more matches
<u>: The Unarticulated Annotation (Underline) element - HTML: Hypertext Markup Language
Web › HTML › Element › u
the html unarticulated annotation element (<u>) represents a span of inline text which should be rendered in a way that indicates that it has a non-textual annotation.
... this element used to be called the "underline" element in older versions of html, and is still sometimes misused in this way.
... permitted parents any element that accepts phrasing content.
...And 10 more matches
Adding Event Handlers to XBL-defined Elements - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Adding Event Handlers to XBL-defined Elements
« previousnext » next, we'll find out how to add event handlers to xbl-defined elements.
... event handlers as you might expect, mouse clicks, key presses and other events are passed to each of the elements inside the content.
...you can add event handlers to the elements inside the content if needed.
...And 9 more matches
XForms Select1 Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Select1
the list of pre-defined items can be specified by either item (see the spec) or itemset (see the spec) elements.
... you can visually group these pre-defined items by using the choices (see the spec) element to contain them.
... note, some representations of the select1 element do not support visual grouping.
...And 9 more matches
JS_SetElement
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS SetElement
syntax /* added in spidermonkey 31 */ bool js_setelement(jscontext *cx, js::handleobject obj, uint32_t index, js::handlevalue v); bool js_setelement(jscontext *cx, js::handleobject obj, uint32_t index, js::handleobject v); bool js_setelement(jscontext *cx, js::handleobject obj, uint32_t index, js::handlestring v); bool js_setelement(jscontext *cx, js::handleobject obj, uint32_t index, int32_t v); bool js_setelement(jscontext *cx, js::handleobject obj, uint32_t index, uint32_t v); bool js_setelement(jscontext *cx, js::handleobject obj, uint32_t index, double v); /* obsolete since jsapi 29 */ bool js_setelement(jscontext *cx, js::handleobject ob...
...j, uint32_t index, js::mutablehandlevalue vp); name type description cx jscontext * the context in which to set the element.
... index uint32_t index number of the element to set.
...And 9 more matches
Document.getElementsByTagNameNS() - Web APIs
Web › API › Document › getElementsByTagNameNS
returns a list of elements with the given tag name belonging to the given namespace.
... syntax elements = document.getelementsbytagnamens(namespace, name) elements is a live nodelist (but see the note below) of found elements in the order they appear in the tree.
... namespace is the namespace uri of elements to look for (see element.namespaceuri).
...And 9 more matches
Element: fullscreenchange event - Web APIs
Web › API › Element › fullscreenchange event
the fullscreenchange event is fired immediately after an element switches into or out of full-screen mode.
... bubbles yes cancelable no interface event event handler property onfullscreenchange this event is sent to the element which is transitioning into or out of full-screen mode.
... examples in this example, a handler for the fullscreenchange event is added to the element whose id is fullscreen-div.
...And 9 more matches
Element.getBoundingClientRect() - Web APIs
Web › API › Element › getBoundingClientRect
the element.getboundingclientrect() method returns the size of an element and its position relative to the viewport.
... the element's size is equal to its width/height + padding + border-width in the case that the standard box model is being used, or width/height only if box-sizing: border-box has been set on it.
... syntax domrect = element.getboundingclientrect(); value the returned value is a domrect object which is the union of the rectangles returned by getclientrects() for the element, i.e., the css border-boxes associated with the element.
...And 9 more matches
HTMLAudioElement - Web APIs
Web › API › HTMLAudioElement
the htmlaudioelement interface provides access to the properties of <audio> elements, as well as methods to manipulate them.
... it's based on, and inherits properties and methods from, the htmlmediaelement interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 9 more matches
HTMLHeadElement - Web APIs
Web › API › HTMLHeadElement
the htmlheadelement interface contains the descriptive information, or metadata, for a document.
... this object inherits all of the properties and methods described in the htmlelement interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 9 more matches
HTMLProgressElement - Web APIs
Web › API › HTMLProgressElement
the htmlprogresselement interface provides special properties and methods (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating the layout and presentation of <progress> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlprogresselement" target="_top"><rect x="301" y="65" width="190" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" fon...
...And 9 more matches
HTMLSelectElement.add() - Web APIs
Web › API › HTMLSelectElement › add
the htmlselectelement.add() method adds an element to the collection of option elements for this select element.
... syntax collection.add(item[, before]); parameters item is an htmloptionelement or htmloptgroupelement before is optional and an element of the collection, or an index of type long, representing the item item should be inserted before.
... if this parameter is null (or the index does not exist), the new element is appended to the end of the collection.
...And 9 more matches
HTMLTitleElement - Web APIs
Web › API › HTMLTitleElement
the htmltitleelement interface contains the title for a document.
... this element inherits all of the properties and methods of the htmlelement interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 9 more matches
MediaElementAudioSourceNode - Web APIs
Web › API › MediaElementAudioSourceNode
the mediaelementaudiosourcenode interface represents an audio source consisting of an html5 <audio> or <video> element.
... a mediaelementsourcenode has no inputs and exactly one output, and is created using the audiocontext.createmediaelementsource() method.
... the amount of channels in the output equals the number of channels of the audio referenced by the htmlmediaelement used in the creation of the node, or is 1 if the htmlmediaelement has no audio.
...And 9 more matches
SVGEllipseElement - Web APIs
Web › API › SVGEllipseElement
the svgellipseelement interface provides access to the properties of <ellipse> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 9 more matches
SVGFEDiffuseLightingElement - Web APIs
Web › API › SVGFEDiffuseLightingElement
the svgfediffuselightingelement interface corresponds to the <fediffuselighting> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfediffuselightingelement" target="_top"><rect x="211" y="65" width="270" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="346" y="94" font-size="12p...
...And 9 more matches
SVGFEDropShadowElement - Web APIs
Web › API › SVGFEDropShadowElement
the svgfedropshadowelement interface corresponds to the <fedropshadow> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfedropshadowelement" target="_top"><rect x="261" y="65" width="220" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="371" y="94" font-size="12px" fo...
...And 9 more matches
SVGFEMorphologyElement - Web APIs
Web › API › SVGFEMorphologyElement
the svgfemorphologyelement interface corresponds to the <femorphology> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfemorphologyelement" target="_top"><rect x="261" y="65" width="220" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="371" y="94" font-size="12px" fo...
...And 9 more matches
SVGRadialGradientElement - Web APIs
Web › API › SVGRadialGradientElement
the svgradialgradientelement interface corresponds to the <radialgradient> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggradientelement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 9 more matches
SVGTextPathElement - Web APIs
Web › API › SVGTextPathElement
the svgtextpathelement interface corresponds to the <textpath> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 9 more matches
Block-level elements - HTML: Hypertext Markup Language
Web › HTML › Block-level elements
html (hypertext markup language) elements historically were categorized as either "block-level" elements or "inline-level" elements.
... by default, a block-level element occupies the entire space of its parent element (container), thereby creating a "block." this article helps to explain what this means.
... browsers typically display the block-level element with a newline both before and after the element.
...And 9 more matches
<fieldset>: The Field Set element - HTML: Hypertext Markup Language
Web › HTML › Element › fieldset
the html <fieldset> element is used to group several controls as well as labels (<label>) within a web form.
... as the example above shows, the <fieldset> element provides a grouping for a part of an html form, with a nested <legend> element providing a caption for the <fieldset>.
... attributes this element includes the global attributes.
...And 9 more matches
<ol>: The Ordered List element - HTML: Hypertext Markup Language
Web › HTML › Element › ol
the html <ol> element represents an ordered list of items — typically rendered as a numbered list.
... content categories flow content, and if the <ol> element's children include at least one <li> element, palpable content.
... permitted content zero or more <li>, <script> and <template> elements.
...And 9 more matches
<style>: The Style Information element - HTML: Hypertext Markup Language
Web › HTML › Element › style
the html <style> element contains style information for a document, or part of a document.
... it contains css, which is applied to the contents of the document containing the <style> element.
... the <style> element must be included inside the <head> of the document.
...And 9 more matches
<td>: The Table Data Cell element - HTML: Hypertext Markup Language
Web › HTML › Element › td
the html <td> element defines a cell of a table that contains data.
... the end tag may be omitted, if it is immediately followed by a <th> or <td> element or if there are no more data in its parent element.
... permitted parents a <tr> element.
...And 9 more matches
CustomElementRegistry - Web APIs
Web › API › CustomElementRegistry
the customelementregistry interface provides methods for registering custom elements and querying registered elements.
... to get an instance of it, use the window.customelements property.
... methods customelementregistry.define() defines a new custom element.
...And 8 more matches
Document.getElementsByClassName() - Web APIs
Web › API › Document › getElementsByClassName
the getelementsbyclassname method of document interface returns an array-like object of all child elements which have all of the given class name(s).
...you may also call getelementsbyclassname() on any element; it will return only elements which are descendants of the specified root element with the given class name(s).
... syntax var elements = document.getelementsbyclassname(names); // or: var elements = rootelement.getelementsbyclassname(names); elements is a live htmlcollection of found elements.
...And 8 more matches
Document.getElementsByName() - Web APIs
Web › API › Document › getElementsByName
the getelementsbyname() method of the document object returns a nodelist collection of elements with a given name in the document.
... syntax var elements = document.getelementsbyname(name); elements is a live nodelist collection, meaning it automatically updates as new elements with the same name are added to/removed from the document.
... name is the value of the name attribute of the element(s).
...And 8 more matches
DocumentOrShadowRoot.elementFromPoint() - Web APIs
Web › API › DocumentOrShadowRoot › elementFromPoint
the elementfrompoint() method—available on both the document and shadowroot objects—returns the topmost element at the specified coordinates (relative to the viewport).
... if the element at the specified point belongs to another document (for example, the document of an <iframe>), that document's parent element is returned (the <iframe> itself).
... if the element at the given point is anonymous or xbl generated content, such as a textbox's scroll bars, then the first non-anonymous ancestor element (for example, the textbox) is returned.
...And 8 more matches
Element: click event - Web APIs
Web › API › Element › click event
an element receives a click event when a pointing device button (such as a mouse's primary mouse button) is both pressed and released while the pointer is located inside the element.
... bubbles yes cancelable yes interface mouseevent event handler property onclick if the button is pressed on one element and the pointer is moved outside the element before the button is released, the event is fired on the most specific ancestor element that contained both elements.
... internet explorer internet explorer 8 & 9 suffer from a bug where elements with a computed background-color of transparent that are overlaid on top of other element(s) won't receive click events.
...And 8 more matches
Element.scrollHeight - Web APIs
Web › API › Element › scrollHeight
the element.scrollheight read-only property is a measurement of the height of an element's content, including content not visible on the screen due to overflow.
... the scrollheight value is equal to the minimum height the element would require in order to fit all the content in the viewport without using a vertical scrollbar.
... the height is measured in the same way as clientheight: it includes the element's padding, but not its border, margin or horizontal scrollbar (if present).
...And 8 more matches
HTMLElement.offsetHeight - Web APIs
Web › API › HTMLElement › offsetHeight
the htmlelement.offsetheight read-only property returns the height of an element, including vertical padding and borders, as an integer.
... typically, offsetheight is a measurement in pixels of the element's css height, including any borders, padding, and horizontal scrollbars (if rendered).
... it does not include the height of pseudo-elements such as ::before or ::after.
...And 8 more matches
HTMLHeadingElement - Web APIs
Web › API › HTMLHeadingElement
the htmlheadingelement interface represents the different heading elements, <h1> through <h6>.
... it inherits methods and properties from the htmlelement interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 8 more matches
HTMLImageElement.x - Web APIs
Web › API › HTMLImageElement › x
the read-only htmlimageelement property x indicates the x-coordinate of the <img> element's left border edge relative to the root element's origin.
...in other words: it has either of those values set explicitly on it, or it has inherited it from a containing element, or by being located within a column described by either <col> or <colgroup>.
... syntax let imagex = htmlimageelement.x; value an integer value indicating the distance in pixels from the left edge of the element's nearest root element and the left edge of the <img> element's border box.
...And 8 more matches
HTMLImageElement.y - Web APIs
Web › API › HTMLImageElement › y
the read-only htmlimageelement property y indicates the y-coordinate of the <img> element's top border edge relative to the root element's origin.
...in other words: it has either of those values set explicitly on it, or it has inherited it from a containing element, or by being located within a column described by either <col> or <colgroup>.
... syntax let imagey = htmlimageelement.y; value an integer value indicating the distance in pixels from the top edge of the element's nearest root element to the top edge of the <img> element's border box.
...And 8 more matches
HTMLIsIndexElement - Web APIs
Web › API › HTMLIsIndexElement
the htmlisindexelement interface provides special properties (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating <isindex> elements.
... the <isindex> element has been deprecated in html4 and removed in html5.
... this latest specification requires that this element implements htmlunknownelement rather than htmlisindexelement.
...And 8 more matches
HTMLMapElement - Web APIs
Web › API › HTMLMapElement
the htmlmapelement interface provides special properties and methods (beyond those of the regular object htmlelement interface it also has available to it by inheritance) for manipulating the layout and presentation of map elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlmapelement" target="_top"><rect x="351" y="65" width="140" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="421" y="94" font-size="12px" font-fam...
...And 8 more matches
HTMLMediaElement.load() - Web APIs
Web › API › HTMLMediaElement › load
the htmlmediaelement method load() resets the media element to its initial state and begins the process of selecting a media source and loading the media in preparation for playback to begin at the beginning.
... the amount of media data that is prefetched is determined by the value of the element's preload attribute.
... this method is generally only useful when you've made dynamic changes to the set of sources available for the media element, either by changing the element's src attribute or by adding or removing <source> elements nested within the media element itself.
...And 8 more matches
HTMLOptGroupElement - Web APIs
Web › API › HTMLOptGroupElement
the htmloptgroupelement interface provides special properties and methods (beyond the regular htmlelement object interface they also have available to them by inheritance) for manipulating the layout and presentation of <optgroup> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmloptgroupelement" target="_top"><rect x="301" y="65" width="190" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" fon...
...And 8 more matches
HTMLTableElement.insertRow() - Web APIs
Web › API › HTMLTableElement › insertRow
the htmltableelement.insertrow() method inserts a new row (<tr>) in a given <table>, and returns a reference to the new row.
... if a table has multiple <tbody> elements, by default, the new row is inserted into the last <tbody>.
... to insert the row into a specific <tbody>: let specific_tbody = document.getelementbyid(tbody_id); let row = specific_tbody.insertrow(index) note: insertrow() inserts the row directly into the table.
...And 8 more matches
HTMLUListElement - Web APIs
Web › API › HTMLUListElement
the htmlulistelement interface provides special properties (beyond those defined on the regular htmlelement interface it also has available to it by inheritance) for manipulating unordered list elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlulistelement" target="_top"><rect x="331" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-f...
...And 8 more matches
HTMLVideoElement.videoHeight - Web APIs
Web › API › HTMLVideoElement › videoHeight
the htmlvideoelement interface's read-only videoheight property indicates the intrinsic height of the video, expressed in css pixels.
... syntax height = htmlvideoelement.videoheight; value an integer value specifying the intrinsic height of the video in css pixels.
... if the element's readystate is htmlmediaelement.have_nothing, then the value of this property is 0, because neither video nor poster frame size information is yet available.
...And 8 more matches
HTMLVideoElement.videoWidth - Web APIs
Web › API › HTMLVideoElement › videoWidth
the htmlvideoelement interface's read-only videowidth property indicates the intrinsic width of the video, expressed in css pixels.
... syntax width = htmlvideoelement.videowidth; value an integer value specifying the intrinsic width of the video in css pixels.
... if the element's readystate is htmlmediaelement.have_nothing, then the value of this property is 0, because neither video nor poster frame size information is yet available.
...And 8 more matches
SVGFEBlendElement - Web APIs
Web › API › SVGFEBlendElement
the svgfeblendelement interface corresponds to the <feblend> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfeblendelement" target="_top"><rect x="311" y="65" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" font-fa...
...And 8 more matches
SVGFEColorMatrixElement - Web APIs
Web › API › SVGFEColorMatrixElement
the svgfecolormatrixelement interface corresponds to the <fecolormatrix> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfecolormatrixelement" target="_top"><rect x="251" y="65" width="230" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="366" y="94" font-size="12px" f...
...And 8 more matches
SVGFECompositeElement - Web APIs
Web › API › SVGFECompositeElement
the svgfecompositeelement interface corresponds to the <fecomposite> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfecompositeelement" target="_top"><rect x="271" y="65" width="210" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="376" y="94" font-size="12px" fon...
...And 8 more matches
SVGForeignObjectElement - Web APIs
Web › API › SVGForeignObjectElement
the svgforeignobjectelement interface provides access to the properties of <foreignobject> elements, as well as methods to manipulate them.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 8 more matches
SVGGradientElement - Web APIs
Web › API › SVGGradientElement
the svggradient interface is a base interface used by svglineargradientelement and svgradialgradientelement.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggradientelement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-f...
...And 8 more matches
SVGGraphicsElement - Web APIs
Web › API › SVGGraphicsElement
the svggraphicselement interface represents svg elements whose primary purpose is to directly render graphics into a group.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-f...
...And 8 more matches
SVGLinearGradientElement - Web APIs
Web › API › SVGLinearGradientElement
the svglineargradientelement interface corresponds to the <lineargradient> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggradientelement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 8 more matches
SVGMarkerElement - Web APIs
Web › API › SVGMarkerElement
svg path segment interface the svgmarkerelement interface corresponds to the marker element.
... properties this interface also inherits properties from its parent interface, svgelement, and implements properties from svgexternalresourcesrequired, svganimatedpreserveaspectratio, and svgstylable.
... name type description refx svganimatedlength corresponds to attribute refx on the given marker element.
...And 8 more matches
<a>: The Anchor element - HTML: Hypertext Markup Language
Web › HTML › Element › a
the html <a> element (or anchor element), with its href attribute, creates a hyperlink to web pages, files, email addresses, locations in the same page, or anything else a url can address.
... attributes this element's attributes include the global attributes.
...firefox 79+) setting target="_blank" on <a> elements implicitly provides the same rel behavior as setting rel="noopener".
...And 8 more matches
<address>: The Contact Address element - HTML: Hypertext Markup Language
Web › HTML › Element › address
the html <address> element indicates that the enclosed html provides contact information for a person or people, or for an organization.
... the contact information provided by an <address> element's contents can take whatever form is appropriate for the context, and may include any type of contact information that is needed, such as a physical address, url, email address, phone number, social media handle, geographic coordinates, and so forth.
... the <address> element should include the name of the person, people, or organization to which the contact information refers.
...And 8 more matches
<meta>: The Document-level Metadata element - HTML: Hypertext Markup Language
Web › HTML › Element › meta
the html <meta> element represents metadata that cannot be represented by other html meta-related elements, like <base>, <link>, <script>, <style> or <title>.
... permitted content none, it is an empty element.
... tag omission as it is a void element, the start tag must be present and the end tag must not be present.
...And 8 more matches
<strong>: The Strong Importance element - HTML: Hypertext Markup Language
Web › HTML › Element › strong
the html strong importance element (<strong>) indicates that its contents have strong importance, seriousness, or urgency.
... permitted parents any element that accepts phrasing content, or any element that accepts flow content.
... implicit aria role no corresponding role permitted aria roles any dom interface htmlelement attributes this element only includes the global attributes.
...And 8 more matches
<tfoot>: The Table Foot element - HTML: Hypertext Markup Language
Web › HTML › Element › tfoot
the html <tfoot> element defines a set of rows summarizing the columns of the table.
... permitted content zero or more <tr> elements.
...the end tag may be omitted if there is no more content in the parent <table> element.
...And 8 more matches
<ul>: The Unordered List element - HTML: Hypertext Markup Language
Web › HTML › Element › ul
the html <ul> element represents an unordered list of items, typically rendered as a bulleted list.
... content categories flow content, and if the <ul> element's children include at least one <li> element, palpable content.
... permitted content zero or more <li>, <script> and <template> elements.
...And 8 more matches
XForms Input Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Input
introduction this element is an important and oft-used xforms element to show and change the instance data to which this xforms control is bound (see the spec).
... mozilla extensions labelposition - only for boolean types: show the label before or after the checkbox (see below) type restrictions the input element can be bound to a node containing simple content of any data type except xsd:base64binary, xsd:hexbinray or any data type derived from these.
... representations the xforms input element can be represented by the following widgets for the spcified data types (or types derived from these data types): text field - the default widget when no type is specified or the data is of type xsd:string (xhtml/xul) checkbox - used for xsd:boolean instance data.
...And 7 more matches
XForms Select Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Select
the list of pre-defined items can be specified by either item (see the spec) or itemset (see the spec) elements.
... you can visually group these pre-defined items by using the choices (see the spec) element to contain them.
... note, some representations of the select element do not support visual grouping.
...And 7 more matches
JS_DeleteElement
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS DeleteElement
removes a specified element or numeric property from an object.
... syntax bool js_deleteelement(jscontext *cx, js::handleobject obj, uint32_t index); // added in spidermonkey 45 bool js_deleteelement(jscontext *cx, js::handleobject obj, uint32_t index, js::objectopresult &result); name type description cx jscontext * pointer to a js context from which to derive runtime information.
... obj js::handleobject object from which to delete an element.
...And 7 more matches
JS_DeleteElement2
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS DeleteElement2
removes a specified element or numeric property from an object.
... renamed to js_deleteelement in jsapi 39 syntax bool js_deleteelement2(jscontext *cx, js::handleobject obj, uint32_t index, bool *succeeded); name type description cx jscontext * pointer to a js context from which to derive runtime information.
... obj js::handleobject object from which to delete an element.
...And 7 more matches
JS_LookupElement
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS LookupElement
syntax bool js_lookupelement(jscontext *cx, js::handleobject obj, uint32_t index, js::mutablehandlevalue vp); name type description cx jscontext * the context in which to look up the property.
...on success, *vp receives the stored value of obj[index], or undefined if the element does not exist.
... description js_lookupelement examines a specified javascript object, obj, for a numeric property numbered index.
...And 7 more matches
nsIDOMXULLabeledControlElement
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMXULLabeledControlElement
dom/interfaces/xul/nsidomxullabeledcontrolel.idlscriptable this interface is used as a basis for labeled control elements in xul.
... inherits from: nsidomxulcontrolelement last changed in gecko 1.7 attributes attribute type description accesskey domstring this should be set to a character that is used as a shortcut key.
... this should be one of the characters that appears in the label for the element.
...And 7 more matches
AudioContext.createMediaElementSource() - Web APIs
Web › API › AudioContext › createMediaElementSource
the createmediaelementsource() method of the audiocontext interface is used to create a new mediaelementaudiosourcenode object, given an existing html <audio> or <video> element, the audio from which can then be played and manipulated.
... for more details about media element audio source nodes, check out the mediaelementaudiosourcenode reference page.
... syntax var audioctx = new audiocontext(); var source = audioctx.createmediaelementsource(mymediaelement); parameters mymediaelement an htmlmediaelement object that you want to feed into an audio processing graph to manipulate.
...And 7 more matches
CSSPseudoElement - Web APIs
Web › API › CSSPseudoElement
the csspseudoelement interface represents a pseudo-element that may be the target of an event or animated using the web animations api.
... instances of this interface may be obtained by calling element.pseudo().
... properties csspseudoelement.element read only returns the originating/parent element of the pseudo-element.
...And 7 more matches
Determining the dimensions of elements - Web APIs
Web › API › CSS Object Model › Determining the dimensions of elements
there are several properties you can look at in order to determine the width and height of elements, and it can be tricky to determine which is the right one for your needs.
...if you want to set the width and height of an element, use width and height or the overriding min-width and max-width, and min-height and max-height properties.
... if you need to know the total amount of space an element occupies, including the width of the visible content, scrollbars (if any), padding, and border, you want to use the htmlelement.offsetwidth and htmlelement.offsetheight properties.
...And 7 more matches
DocumentOrShadowRoot.activeElement - Web APIs
Web › API › DocumentOrShadowRoot › activeElement
the activeelement read-only property of the document and shadowroot interfaces returns the element within the dom or shadow dom tree that currently has focus.
... often activeelement will return a htmlinputelement or htmltextareaelement object if it has the text selection at the time.
...other times the focused element might be a <select> element (menu) or an <input> element, of type "button", "checkbox", or "radio".
...And 7 more matches
Element.insertAdjacentHTML() - Web APIs
Web › API › Element › insertAdjacentHTML
the insertadjacenthtml() method of the element interface parses the specified text as html or xml and inserts the resulting nodes into the dom tree at a specified position.
... it does not reparse the element it is being used on, and thus it does not corrupt the existing elements inside that element.
... syntax element.insertadjacenthtml(position, text); parameters position a domstring representing the position relative to the element; must be one of the following strings: 'beforebegin': before the element itself.
...And 7 more matches
Element.outerHTML - Web APIs
Web › API › Element › outerHTML
the outerhtml attribute of the element dom interface gets the serialized html fragment describing the element including its descendants.
... it can also be set to replace the element with nodes parsed from the given string.
... to only obtain the html representation of the contents of an element, or to replace the contents of an element, use the innerhtml property instead.
...And 7 more matches
Element.querySelectorAll() - Web APIs
Web › API › Element › querySelectorAll
the element method queryselectorall() returns a static (not live) nodelist representing a list of elements matching the specified group of selectors which are descendants of the element on which the method was called.
... syntax elementlist = parentnode.queryselectorall(selectors); parameters selectors a domstring containing one or more selectors to match against.
...see locating dom elements using selectors for more information about using selectors to identify elements.
...And 7 more matches
HTMLBaseFontElement - Web APIs
Web › API › HTMLBaseFontElement
the htmlbasefontelement interface provides special properties (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating <basefont> elements.
... the <basefont> element has been deprecated in html4 and removed in html5.
... this latest specification requires that this element implements htmlunknownelement rather than htmlbasefontelement.
...And 7 more matches
HTMLDListElement - Web APIs
Web › API › HTMLDListElement
the htmldlistelement interface provides special properties (beyond those of the regular htmlelement interface it also has available to it by inheritance) for manipulating definition list (<dl>) elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmldlistelement" target="_top"><rect x="331" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-f...
...And 7 more matches
HTMLDivElement - Web APIs
Web › API › HTMLDivElement
the htmldivelement interface provides special properties (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating <div> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmldivelement" target="_top"><rect x="351" y="65" width="140" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="421" y="94" font-size="12px" font-fam...
...And 7 more matches
HTMLFrameSetElement - Web APIs
Web › API › HTMLFrameSetElement
the htmlframesetelement interface provides special properties (beyond those of the regular htmlelement interface they also inherit) for manipulating <frameset> elements.
... properties inherits properties from its parent, htmlelement and from windoweventhandlers.
... htmlframesetelement.cols is a domstring structured as a comma-seperated list specifing the width of each column inside a frameset.
...And 7 more matches
HTMLInputElement.setSelectionRange() - Web APIs
Web › API › HTMLInputElement › setSelectionRange
the htmlinputelement.setselectionrange() method sets the start and end positions of the current text selection in an <input> or <textarea> element.
... this method updates the htmlinputelement.selectionstart, selectionend, and selectiondirection properties in one call.
...for example, on input of type number: "failed to read the 'selectionstart' property from 'htmlinputelement': the input element's type ('number') does not support selection".
...And 7 more matches
HTMLMediaElement.audioTracks - Web APIs
Web › API › HTMLMediaElement › audioTracks
the read-only audiotracks property on htmlmediaelement objects returns an audiotracklist object listing all of the audiotrack objects representing the media element's audio tracks.
... the media element may be either an <audio> element or a <video> element.
... the returned list is live; that is, as tracks are added to and removed from the media element, the list's contents change dynamically.
...And 7 more matches
HTMLMediaElement.srcObject - Web APIs
Web › API › HTMLMediaElement › srcObject
the srcobject property of the htmlmediaelement interface sets or returns the object which serves as the source of the media associated with the htmlmediaelement.
...until other browsers catch up, for mediasource, blob and file, consider falling back to creating a url with url.createobjecturl() and assign it to htmlmediaelement.src.
... syntax var sourceobject = htmlmediaelement.srcobject; htmlmediaelement.srcobject = sourceobject; value a mediastream, mediasource, blob, or file object (though see the compatibility table for what is actually supported).
...And 7 more matches
HTMLMetaElement - Web APIs
Web › API › HTMLMetaElement
the htmlmetaelement interface contains descriptive metadata about a document.
... it inherits all of the properties and methods described in the htmlelement interface.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 7 more matches
HTMLModElement - Web APIs
Web › API › HTMLModElement
the htmlmodelement interface provides special properties (beyond the regular methods and properties available through the htmlelement interface they also have available to them by inheritance) for manipulating modification elements, that is <del> and <ins>.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlmodelement" target="_top"><rect x="351" y="65" width="140" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="421" y="94" font-size="12px" font-fam...
...And 7 more matches
HTMLParagraphElement - Web APIs
Web › API › HTMLParagraphElement
the htmlparagraphelement interface provides special properties (beyond those of the regular htmlelement object interface it inherits) for manipulating <p> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlparagraphelement" target="_top"><rect x="291" y="65" width="200" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" fo...
...And 7 more matches
HTMLPreElement - Web APIs
Web › API › HTMLPreElement
the htmlpreelement interface exposes specific properties and methods (beyond those of the htmlelement interface it also has available to it by inheritance) for manipulating a block of preformatted text (<pre>).
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlpreelement" target="_top"><rect x="351" y="65" width="140" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="421" y="94" font-size="12px" font-fam...
...And 7 more matches
HTMLQuoteElement - Web APIs
Web › API › HTMLQuoteElement
the htmlquoteelement interface provides special properties and methods (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating quoting elements, like <blockquote> and <q>, but not the <cite> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlquoteelement" target="_top"><rect x="331" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-f...
...And 7 more matches
HTMLSelectElement.selectedOptions - Web APIs
Web › API › HTMLSelectElement › selectedOptions
the read-only htmlselectelement property selectedoptions contains a list of the <option> elements contained within the <select> element that are currently selected.
... an option is considered selected if it has an htmloptionelement.selected attribute.
... syntax var selectedcollection = htmlselectelement.selectedoptions; value an htmlcollection which lists every currently selected htmloptionelement which is either a child of the htmlselectelement or of an htmloptgroupelement within the <select> element.
...And 7 more matches
HTMLSpanElement - Web APIs
Web › API › HTMLSpanElement
the htmlspanelement interface represents a <span> element and derives from the htmlelement interface, but without implementing any additional properties or methods.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlspanelement" target="_top"><rect x="341" y="65" width="150" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="416" y="94" font-size="12px" font-fa...
...And 7 more matches
HTMLTableCaptionElement - Web APIs
Web › API › HTMLTableCaptionElement
the htmltablecaptionelement interface special properties (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating table caption elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmltablecaptionelement" target="_top"><rect x="261" y="65" width="230" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="376" y="94" font-size="12px"...
...And 7 more matches
NonDocumentTypeChildNode.nextElementSibling - Web APIs
Web › API › NonDocumentTypeChildNode › nextElementSibling
the nondocumenttypechildnode.nextelementsibling read-only property returns the element immediately following the specified one in its parent's children list, or null if the specified element is the last one in the list.
... syntax var nextnode = elementnodereference.nextelementsibling; example <div id="div-01">here is div-01</div> <div id="div-02">here is div-02</div> <script type="text/javascript"> var el = document.getelementbyid('div-01').nextelementsibling; console.log('siblings of div-01:'); while (el) { console.log(el.nodename); el = el.nextelementsibling; } </script> this example outputs the following into the console when it loads: siblings of div-01: div script polyfill for internet explorer 8 this property is unsupported prior to ie9, so the following snippet can be used to add support to ie8: // source: https://github.com/alhadis/snippets/blob/master/js/polyfills/ie8-child-elements.js if(!("nextelementsibling" in document.documentelement)){ object.defineproperty(element.pr...
...ototype, "nextelementsibling", { get: function(){ var e = this.nextsibling; while(e && 1 !== e.nodetype) e = e.nextsibling; return e; } }); } polyfill for internet explorer 9+ and safari // source: https://github.com/jserz/js_piece/blob/master/dom/nondocumenttypechildnode/nextelementsibling/nextelementsibling.md (function (arr) { arr.foreach(function (item) { if (item.hasownproperty('nextelementsibling')) { return; } object.defineproperty(item, 'nextelementsibling', { configurable: true, enumerable: true, get: function () { var el = this; while (el = el.nextsibling) { if (el.nodetype === 1) { return el; } } return null; ...
...And 7 more matches
ParentNode.childElementCount - Web APIs
Web › API › ParentNode › childElementCount
the parentnode.childelementcount read-only property returns an unsigned long representing the number of child elements of the given element.
... this property was initially defined in the elementtraversal pure interface.
...in this case, childelementcount moved to parentnode.
...And 7 more matches
SVGFEOffsetElement - Web APIs
Web › API › SVGFEOffsetElement
the svgfeoffsetelement interface corresponds to the <feoffset> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfeoffsetelement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-f...
...And 7 more matches
SVGFEPointLightElement - Web APIs
Web › API › SVGFEPointLightElement
the svgfepointlightelement interface corresponds to the <fepointlight> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfepointlightelement" target="_top"><rect x="261" y="65" width="220" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="371" y="94" font-size="12px" fo...
...And 7 more matches
SVGGlyphRefElement - Web APIs
Web › API › SVGGlyphRefElement
the svgglyphrefelement interface corresponds to the <glyphref> elements.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgglyphrefelement" target="_top"><rect x="1" y="1" width="180" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="91" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgglyphrefelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface also inherits properties from its parent, svgelement an...
... svgglyphrefelement.glyphref a domstring corresponding to the glyphref attribute of the given element.
...And 7 more matches
SVGStyleElement - Web APIs
Web › API › SVGStyleElement
svg style interface the svgstyleelement interface corresponds to the svg <style> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgstyleelement" target="_top"><rect x="331" y="65" width="150" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="406" y="94" font-size="12px" font-fami...
...And 7 more matches
<article>: The Article Contents element - HTML: Hypertext Markup Language
Web › HTML › Element › article
the html <article> element represents a self-contained composition in a document, page, application, or site, which is intended to be independently distributable or reusable (e.g., in syndication).
... a given document can have multiple articles in it; for example, on a blog that shows the text of each article one after another as the reader scrolls, each post would be contained in an <article> element, possibly with one or more <section>s within.
... permitted parents any element that accepts flow content.
...And 7 more matches
<canvas>: The Graphics Canvas element - HTML: Hypertext Markup Language
Web › HTML › Element › canvas
use the html <canvas> element with either the canvas scripting api or the webgl api to draw graphics and animations.
... permitted content transparent but with no interactive content descendants except for <a> elements, <button> elements, <input> elements whose type attribute is checkbox, radio, or button.
... permitted parents any element that accepts phrasing content.
...And 7 more matches
<dl>: The Description List element - HTML: Hypertext Markup Language
Web › HTML › Element › dl
the html <dl> element represents a description list.
... the element encloses a list of groups of terms (specified using the <dt> element) and descriptions (provided by <dd> elements).
... common uses for this element are to implement a glossary or to display metadata (a list of key-value pairs).
...And 7 more matches
<i>: The Idiomatic Text element - HTML: Hypertext Markup Language
Web › HTML › Element › i
the html idiomatic text element (<i>) represents a range of text that is set off from the normal text for some reason, such as idiomatic text, technical terms, taxonomical designations, among others.
... historically, these have been presented using italicized type, which is the original source of the <i> naming of this element.
... permitted parents any element that accepts phrasing content.
...And 7 more matches
<iframe>: The Inline Frame element - HTML: Hypertext Markup Language
Web › HTML › Element › iframe
the html inline frame element (<iframe>) represents a nested browsing context, embedding another html page into the current one.
... permitted parents any element that accepts embedded content.
... implicit aria role no corresponding role permitted aria roles application, document, img, none, presentation dom interface htmliframeelement attributes this element includes the global attributes.
...And 7 more matches
<plaintext>: The Plain Text element (Deprecated) - HTML: Hypertext Markup Language
Web › HTML › Element › plaintext
the html plaintext element (<plaintext>) renders everything following the start tag as raw text, ignoring any following html.
... note: do not use this element.
... <plaintext> is obsolete in html5; browsers that accept it may instead treat it as a <pre> element that still interprets html within.
...And 7 more matches
<thead>: The Table Head element - HTML: Hypertext Markup Language
Web › HTML › Element › thead
the html <thead> element defines a set of rows defining the head of the columns of the table.
... permitted content zero or more <tr> elements.
...the end tag may be omitted if the <thead> element is immediately followed by a <tbody> or <tfoot> element.
...And 7 more matches
<tt>: The Teletype Text element (obsolete) - HTML: Hypertext Markup Language
Web › HTML › Element › tt
the obsolete html teletype text element (<tt>) creates inline text which is presented using the user agent's default monospace font face.
... this element was created for the purpose of rendering text as it would be displayed on a fixed-width display such as a teletype, text-only screen, or line printer.
... this element is obsolete, however.
...And 7 more matches
nsIDOMElement
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMElement
dom/interfaces/core/nsidomelement.idlscriptable this interface represents an element in an html or xml document.
... inherits from: nsidomnode last changed in gecko 1.7 method overview domstring getattribute(in domstring name); nsidomattr getattributenode(in domstring name); nsidomattr getattributenodens(in domstring namespaceuri, in domstring localname); domstring getattributens(in domstring namespaceuri, in domstring localname); nsidomnodelist getelementsbytagname(in domstring name); nsidomnodelist getelementsbytagnamens(in domstring namespaceuri, in domstring localname); boolean hasattribute(in domstring name); boolean hasattributens(in domstring namespaceuri, in domstring localname); void removeattribute(in domstring name) nsidomattr removeattributenode(in nsidomattr oldattr) void removeattributens(in domstring namespaceuri, in domstring localname) void setattribute(in domstri...
...ng name, in domstring value) nsidomattr setattributenode(in nsidomattr newattr) nsidomattr setattributenodens(in nsidomattr newattr) void setattributens(in domstring namespaceuri, in domstring qualifiedname, in domstring value) attributes attribute type description tagname domstring the element tag name.
...And 6 more matches
ANGLE_instanced_arrays.drawElementsInstancedANGLE() - Web APIs
Web › API › ANGLE instanced arrays › drawElementsInstancedANGLE
the angle_instanced_arrays.drawelementsinstancedangle() method of the webgl api renders primitives from array data like the gl.drawelements() method.
... in addition, it can execute multiple instances of a set of elements.
... note: when using webgl2, this method is available as gl.drawelementsinstanced() by default.
...And 6 more matches
CustomElementRegistry.whenDefined() - Web APIs
Web › API › CustomElementRegistry › whenDefined
the whendefined() method of the customelementregistry interface returns a promise that resolves when the named element is defined.
... syntax promise<> customelements.whendefined(name); parameters name custom element name.
... return value a promise that resolves to undefined when the custom element is defined.
...And 6 more matches
Element.attachShadow() - Web APIs
Web › API › Element › attachShadow
the element.attachshadow() method attaches a shadow dom tree to the specified element and returns a reference to its shadowroot.
... elements you can attach a shadow to note that you can't attach a shadow root to every type of element.
...the following is a list of elements you can attach a shadow root to: any autonomous custom element with a valid name <article> <aside> <blockquote> <body> <div> <footer> <h1> <h2> <h3> <h4> <h5> <h6> <header> <main> <nav> <p> <section> <span> syntax var shadowroot = element.attachshadow(shadowrootinit); parameters shadowrootinit a shadowrootinit dictionary, which can contain the following fields: mode a string specifying the encapsulation mode for the shadow dom tree.
...And 6 more matches
Element.className - Web APIs
Web › API › Element › className
the classname property of the element interface gets and sets the value of the class attribute of the specified element.
... syntax var cname = elementnodereference.classname; elementnodereference.classname = cname; cname is a string variable representing the class or space-separated classes of the current element.
... example let el = document.getelementbyid('item'); if (el.classname === 'active'){ el.classname = 'inactive'; } else { el.classname = 'active'; } notes the name classname is used for this property instead of class because of conflicts with the "class" keyword in many languages which are used to manipulate the dom.
...And 6 more matches
Element.insertAdjacentText() - Web APIs
Web › API › Element › insertAdjacentText
the insertadjacenttext() method of the element interface inserts a given text node at a given position relative to the element it is invoked upon.
... syntax element.insertadjacenttext(position, element); parameters position a domstring representing the position relative to the element; must be one of the following strings: 'beforebegin': before the element itself.
... 'afterbegin': just inside the element, before its first child.
...And 6 more matches
Element.querySelector() - Web APIs
Web › API › Element › querySelector
the queryselector() method of the element interface returns the first element that is a descendant of the element on which it is invoked that matches the specified group of selectors.
... syntax element = baseelement.queryselector(selectors); parameters selectors a group of selectors to match the descendant elements of the element baseelement against; this must be valid css syntax, or a syntaxerror exception will occur.
... the first element found which matches this group of selectors is returned.
...And 6 more matches
Element.scrollWidth - Web APIs
Web › API › Element › scrollWidth
the element.scrollwidth read-only property is a measurement of the width of an element's content, including content not visible on the screen due to overflow.
... the scrollwidth value is equal to the minimum width the element would require in order to fit all the content in the viewport without using a horizontal scrollbar.
... the width is measured in the same way as clientwidth: it includes the element's padding, but not its border, margin or vertical scrollbar (if present).
...And 6 more matches
Element.shadowRoot - Web APIs
Web › API › Element › shadowRoot
the element.shadowroot read-only property represents the shadow root hosted by the element.
... use element.attachshadow() to add a shadow root to an existing element.
... syntax var shadowroot = element.shadowroot; value a shadowroot object instance, or null if the associated shadow root was attached with its mode set to closed.
...And 6 more matches
HTMLBRElement - Web APIs
Web › API › HTMLBRElement
the htmlbrelement interface represents a html line break element (<br>).
... it inherits from htmlelement.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...And 6 more matches
HTMLMedia​Element​.textTracks - Web APIs
Web › API › HTMLMediaElement › textTracks
the read-only texttracks property on htmlmediaelement objects returns a texttracklist object listing all of the texttrack objects representing the media element's text tracks, in the same order as in the list of text tracks.
... you can detect when tracks are added to and removed from an <audio> or <video> element using the addtrack and removetrack events.
... however, these events aren't sent directly to the media element itself.
...And 6 more matches
HTMLSlotElement - Web APIs
Web › API › HTMLSlotElement
the htmlslotelement interface of the shadow dom api enables access to the name and assigned nodes of an html <slot> element.
... properties htmlslotelement.name domstring: can be used to get and set the slot's name.
... methods htmlslotelement.assignednodes() returns a sequence of the nodes assigned to this slot, and if the flatten option is set to true, the assigned nodes of any other slots that are descendants of this slot.
...And 6 more matches
HTMLTableRowElement.insertCell() - Web APIs
Web › API › HTMLTableRowElement › insertCell
the htmltablerowelement.insertcell() method inserts a new cell (<td>) into a table row (<tr>) and returns a reference to the cell.
...the cell does not need to be appended separately with node.appendchild() as would be the case if document.createelement() had been used to create the new <td> element.
... you can not use insertcell() to create a new <th> element though.
...And 6 more matches
HTMLTimeElement - Web APIs
Web › API › HTMLTimeElement
the htmltimeelement interface provides special properties (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating <time> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmltimeelement" target="_top"><rect x="341" y="65" width="150" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="416" y="94" font-size="12px" font-fa...
...And 6 more matches
Recording a media element - Web APIs
Web › API › MediaStream Recording API › Recording a media element
while the article using the mediastream recording api demonstrates using the mediarecorder interface to capture a mediastream generated by a hardware device, as returned by navigator.mediadevices.getusermedia(), you can also use an html media element (namely <audio> or <video>) as the source of the mediastream to be recorded.
...on the left is a start button and a <video> element which displays the video preview; this is the video the user's camera sees.
... <div class="right"> <div id="stopbutton" class="button"> stop </div> <h2>recording</h2> <video id="recording" width="160" height="120" controls></video> <a id="downloadbutton" class="button"> download </a> </div> on the right we see a stop button and the <video> element which will be used to play back the recorded video.
...And 6 more matches
SVGFEDistantLightElement - Web APIs
Web › API › SVGFEDistantLightElement
the svgfedistantlightelement interface corresponds to the <fedistantlight> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfedistantlightelement" target="_top"><rect x="241" y="65" width="240" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="361" y="94" font-size="12px" ...
...And 6 more matches
SVGFEImageElement - Web APIs
Web › API › SVGFEImageElement
the svgfeimageelement interface corresponds to the <feimage> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfeimageelement" target="_top"><rect x="311" y="65" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" font-fa...
...And 6 more matches
SVGGElement - Web APIs
Web › API › SVGGElement
the svggelement interface corresponds to the <g> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 6 more matches
SVGSwitchElement - Web APIs
Web › API › SVGSwitchElement
the svgswitchelement interface corresponds to the <switch> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 6 more matches
SVGTextElement - Web APIs
Web › API › SVGTextElement
the svgtextelement interface corresponds to the <text> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 6 more matches
WebGL2RenderingContext.drawElementsInstanced() - Web APIs
Web › API › WebGL2RenderingContext › drawElementsInstanced
the webgl2renderingcontext.drawelementsinstanced() method of the webgl 2 api renders primitives from array data like the gl.drawelements() method.
... in addition, it can execute multiple instances of a set of elements.
... syntax void gl.drawelementsinstanced(mode, count, type, offset, instancecount); parameters mode a glenum specifying the type primitive to render.
...And 6 more matches
<abbr>: The Abbreviation element - HTML: Hypertext Markup Language
Web › HTML › Element › abbr
the html abbreviation element (<abbr>) represents an abbreviation or acronym; the optional title attribute can provide an expansion or description for the abbreviation.
... permitted parents any element that accepts phrasing content implicit aria role no corresponding role permitted aria roles any dom interface htmlelement attributes this element only supports the global attributes.
... the title attribute has a specific semantic meaning when used with the <abbr> element; it must contain a full human-readable description or expansion of the abbreviation.
...And 6 more matches
<base>: The Document Base URL element - HTML: Hypertext Markup Language
Web › HTML › Element › base
the html <base> element specifies the base url to use for all relative urls in a document.
... there can be only one <base> element in a document.
...if the document has no <base> elements, then baseuri defaults to location.href.
...And 6 more matches
<bdi>: The Bidirectional Isolate element - HTML: Hypertext Markup Language
Web › HTML › Element › bdi
the html bidirectional isolate element (<bdi>) tells the browser's bidirectional algorithm to treat the text it contains in isolation from its surrounding text.
... the <bdi> element is used to wrap a span of text and instructs the bidirectional algorithm to treat this text in isolation from its surroundings.
... though the same visual effect can be achieved using the css rule unicode-bidi: isolate on a <span> or another text-formatting element, html authors should not use this approach because it is not semantic and browsers are allowed to ignore css styling.
...And 6 more matches
<cite>: The Citation element - HTML: Hypertext Markup Language
Web › HTML › Element › cite
the html citation element (<cite>) is used to describe a reference to a cited creative work, and must include the title of that work.
... permitted parents any element that accepts phrasing content.
... implicit aria role no corresponding role permitted aria roles any dom interface htmlelement up to gecko 1.9.2 (firefox 4) inclusive, firefox implements the htmlspanelement interface for this element.
...And 6 more matches
<content>: The Shadow DOM Content Placeholder element (obsolete) - HTML: Hypertext Markup Language
Web › HTML › Element › content
the html <content> element—an obsolete part of the web components suite of technologies—was used inside of shadow dom as an insertion point, and wasn't meant to be used in ordinary html.
... it has now been replaced by the <slot> element, which creates a point in the dom at which a shadow dom can be inserted.
... note: though present in early draft of the specifications and implemented in several browsers, this element has been removed in later versions of the spec, and should not be used.
...And 6 more matches
<div>: The Content Division element - HTML: Hypertext Markup Language
Web › HTML › Element › div
the html content division element (<div>) is the generic container for flow content.
... as a "pure" container, the <div> element does not inherently represent anything.
... or (in whatwg html): if the parent is a <dl> element: one or more <dt> elements followed by one or more <dd> elements, optionally intermixed with <script> and <template> elements.
...And 6 more matches
<embed>: The Embed External Content element - HTML: Hypertext Markup Language
Web › HTML › Element › embed
the html <embed> element embeds external content at the specified point in the document.
... note: this topic documents only the element that is defined as part of html5.
... it does not address earlier, non-standardized implementation of the element.
...And 6 more matches
<head>: The Document Metadata (Header) element - HTML: Hypertext Markup Language
Web › HTML › Element › head
the html <head> element contains machine-readable information (metadata) about the document, like its title, scripts, and style sheets.
...for human-visible information, like top-level headings and listed authors, see the <header> element.
... permitted content if the document is an <iframe> srcdoc document, or if title information is available from a higher level protocol (like the subject line in html email), zero or more elements of metadata content.
...And 6 more matches
<html>: The HTML Document / Root element - HTML: Hypertext Markup Language
Web › HTML › Element › html
the html <html> element represents the root (top-level element) of an html document, so it is also referred to as the root element.
... all other elements must be descendants of this element.
... permitted content one <head> element, followed by one <body> element.
...And 6 more matches
<section>: The Generic Section element - HTML: Hypertext Markup Language
Web › HTML › Element › section
the html <section> element represents a standalone section — which doesn't have a more specific semantic element to represent it — contained within an html document.
... as an example, a navigation menu should be wrapped in a <nav> element, but a list of search results and a map display and its controls don't have specific elements, and could be put inside a <section>.
... note: if the contents of the element would make sense syndicated as a standalone piece, the <article> element may be a better choice.
...And 6 more matches
XForms Label Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Label
every form control other than the output and choices elements must contain a label element.
... it is valid for a form control to have an empty label element.
...if more than one source of label text is specified for this element, the order of precedence is: single node binding attributes, linking attributes, inline text.
...And 5 more matches
Issues Arising From Arbitrary-Element hover - Archive of obsolete content
Archive › Web Standards › Issues Arising From Arbitrary-Element hover
hover and non-link elements section 5.11.3 of css2 defines the three dynamic pseudo-classes (:hover, :active, and :focus) and then goes on to say: css doesn't define which elements may be in the above states, or how the states are entered and left.
... scripting may change whether elements react to user events or not, and different devices and uas may have different ways of pointing to, or activating elements.
...any element can, in theory, be in any of the three states, and thus can be styled based on those states.
...And 5 more matches
JS_GetElement
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS GetElement
syntax bool js_getelement(jscontext *cx, js::handleobject obj, uint32_t index, js::mutablehandlevalue vp); name type description cx jscontext * the context in which to perform the property lookup.
... obj js::handleobject the object to search for the element.
... index uint32_t index of the element to look up.
...And 5 more matches
JS_HasElement
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS HasElement
determine whether a javascript array has an element in the specified index.
... syntax bool js_haselement(jscontext *cx, js::handleobject obj, uint32_t index, bool *foundp); name type description cx jscontext * the context in which to perform the property lookup.
... obj js::handleobject the object to search for the element.
...And 5 more matches
Select an element - Firefox Developer Tools
Tools › Page Inspector › How to › Select an element
the selected element is the element in the page that the inspector is currently focused on.
... the selected element is shown in the html pane and its css is displayed in the css pane.
... the highlighted element is the element that's overlaid in the page with a graphic showing the box model, and a tooltip showing its tag and size: with the context menu to open the inspector and select an element immediately, activate the context menu over the element in the page and select "inspect element": with the html pane when the inspector is open, as you move the mouse around the elements listed in the html pane, the corresponding elements are highlighted in the page.
...And 5 more matches
Document.mozSetImageElement() - Web APIs
Web › API › Document › mozSetImageElement
the document.mozsetimageelement() method changes the element being used as the css background for a background with a given background element id.
... syntax document.mozsetimageelement(imageelementid, imageelement); parameters imageelementid is a string indicating the name of an element that has been specified as a background image using the -moz-element css function.
... imageelement is the new element to use as the background corresponding to that image element string.
...And 5 more matches
Element.animate() - Web APIs
Web › API › Element › animate
the element interface's animate() method is a shortcut method which creates a new animation, applies it to the element, then plays the animation.
... elements can have multiple animations applied to them.
... you can get a list of the animations that affect an element by calling element.getanimations().
...And 5 more matches
Element.attributes - Web APIs
Web › API › Element › attributes
the element.attributes property returns a live collection of all attribute nodes registered to the specified node.
... syntax var attr = element.attributes; example basic examples // get the first <p> element in the document var para = document.getelementsbytagname("p")[0]; var atts = para.attributes; enumerating elements attributes numerical indexing is useful for going through all of an element's attributes.
... the following example runs through the attribute nodes for the element in the document with id "paragraph", and prints each attribute's value.
...And 5 more matches
Element.getAttributeNS() - Web APIs
Web › API › Element › getAttributeNS
the getattributens() method of the element interface returns the string value of the attribute with the specified namespace and name.
... syntax attrval = element.getattributens(namespace, name) parameters namespace the namespace in which to look for the specified attribute.
... <svg xmlns="http://www.w3.org/2000/svg" xmlns:test="http://www.example.com/2014/test" width="40" height="40"> <circle id="target" cx="12" cy="12" r="10" stroke="#444" stroke-width="2" fill="none" test:foo="hello namespaced attribute!"/> <script type="text/javascript"> var ns = 'http://www.example.com/2014/test'; var circle = document.getelementbyid( 'target' ); console.log( 'attribute test:foo: "' + circle.getattributens( ns, 'foo' ) + '"' ); </script> </svg> in an html5 document the attribute has to be accessed with test:foo since namespaces are not supported.
...And 5 more matches
Element.scrollTop - Web APIs
Web › API › Element › scrollTop
the element.scrolltop property gets or sets the number of pixels that an element's content is scrolled vertically.
... an element's scrolltop value is a measurement of the distance from the element's top to its topmost visible content.
... when an element's content does not generate a vertical scrollbar, then its scrolltop value is 0.
...And 5 more matches
Element.setPointerCapture() - Web APIs
Web › API › Element › setPointerCapture
the setpointercapture() method of the element interface is used to designate a specific element as the capture target of future pointer events.
... subsequent events for the pointer will be targeted at the capture element until capture is released (via element.releasepointercapture()).
...this has the effect of suppressing these events on all other elements.
...And 5 more matches
Element.tagName - Web APIs
Web › API › Element › tagName
the tagname read-only property of the element interface returns the tag name of the element on which it's called.
... for example, if the element is an <img>, its tagname property is "img" (for html documents; it may be cased differently for xml/xhtml documents).
... syntax elementname = element.tagname; value a string indicating the element's tag name.
...And 5 more matches
HTMLCanvasElement.toBlob() - Web APIs
Web › API › HTMLCanvasElement › toBlob
the htmlcanvaselement.toblob() method creates a blob object representing the image contained in the canvas; this file may be cached on the disk or stored in memory at the discretion of the user agent.
...the code snippet below, for example, takes the image in the <canvas> element whose id is "canvas", obtains a copy of it as a png image, then appends a new <img> element to the document, whose source image is the one created using the canvas.
... var canvas = document.getelementbyid('canvas'); canvas.toblob(function(blob) { var newimg = document.createelement('img'), url = url.createobjecturl(blob); newimg.onload = function() { // no longer need to read the blob so it's revoked url.revokeobjecturl(url); }; newimg.src = url; document.body.appendchild(newimg); }); note that here we're creating a png image; if you add a second parameter to the toblob() call, you can specify the image type.
...And 5 more matches
HTMLDataElement - Web APIs
Web › API › HTMLDataElement
the htmldataelement interface provides special properties (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating <data> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmldataelement" target="_top"><rect x="341" y="65" width="150" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="416" y="94" font-size="12px" font-fa...
...And 5 more matches
HTMLElement.hidden - Web APIs
Web › API › HTMLElement › hidden
the htmlelement property hidden is a boolean which is true if the element is hidden; otherwise the value is false.
... this is quite different from using the css property display to control the visibility of an element.
... content that isn't yet relevant but may be needed later content that was previously needed but is not any longer content that is reused by other parts of the page in a template-like fashion creating an offscreen canvas as a drawing buffer inappropriate use cases include: hiding panels in a tabbed dialog box hiding content in one presentation while intending it to be visible in others elements that are not hidden must not link to elements which are.
...And 5 more matches
HTMLElement: input event - Web APIs
Web › API › HTMLElement › input event
the input event fires when the value of an <input>, <select>, or <textarea> element has been changed.
... bubbles yes cancelable no interface inputevent event handler property globaleventhandlers.oninput the event also applies to elements with contenteditable enabled, and to any element when designmode is turned on.
...if these properties apply to multiple elements, the editing host is the nearest ancestor element whose parent isn't editable.
...And 5 more matches
HTMLImageElement.crossOrigin - Web APIs
Web › API › HTMLImageElement › crossOrigin
the htmlimageelement interface's crossorigin attribute is a string which specifies the cross-origin resource sharing (cors) setting to use when retrieving the image.
... syntax htmlimageelement.crossorigin = crossoriginmode; let crossoriginmode = htmlimageelement.crossorigin; value a domstring of a keyword specifying the cors mode to use when fetching the image resource.
... permitted values are: anonymous requests by the <img> element have their mode set to cors and their credentials mode set to same-origin.
...And 5 more matches
HTMLImageElement.loading - Web APIs
Web › API › HTMLImageElement › loading
the htmlimageelement property loading is a string whose value provides a hint to the user agent that tells the browser how to handle loading images which are currently outside the window's visual viewport.
... syntax let imageloadscheduling = htmlimageelement.loading; htmlimageelement.loading = eagerorlazy; value a domstring providing a hint to the user agent as to how to best schedule the loading of the image to optimize page performance.
... the possible values are: eager the default behavior, eager tells the browser to load the image as soon as the <img> element is processed.
...And 5 more matches
HTMLMediaElement.networkState - Web APIs
Web › API › HTMLMediaElement › networkState
the htmlmediaelement.networkstate property indicates the current state of the fetching of media over the network.
... network_idle 1 htmlmediaelement is active and has selected a resource, but is not using the network.
... network_loading 2 the browser is downloading htmlmediaelement data.
...And 5 more matches
HTMLElement.focus() - Web APIs
Web › API › HTMLOrForeignElement › focus
the htmlelement.focus() method sets focus on the specified element, if it can be focused.
... the focused element is the element which will receive keyboard and similar events by default.
... syntax element.focus(options); // object parameter parameters options optional an optional object providing options to control aspects of the focusing process.
...And 5 more matches
HTMLTemplateElement - Web APIs
Web › API › HTMLTemplateElement
the htmltemplateelement interface enables access to the contents of an html <template> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmltemplateelement" target="_top"><rect x="301" y="65" width="190" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" fon...
...And 5 more matches
NonDocumentTypeChildNode.previousElementSibling - Web APIs
Web › API › NonDocumentTypeChildNode › previousElementSibling
the nondocumenttypechildnode.previouselementsibling read-only property returns the element immediately prior to the specified one in its parent's children list, or null if the specified element is the first one in the list.
... syntax prevnode = elementnodereference.previouselementsibling; example <div id="div-01">here is div-01</div> <div id="div-02">here is div-02</div> <li>this is a list item</li> <li>this is another list item</li> <div id="div-03">here is div-03</div> <script> let el = document.getelementbyid('div-03').previouselementsibling; document.write('<p>siblings of div-03</p><ol>'); while (el) { document.write('<li>' + el.nodename + '</li>'); el = el.previouselementsibling; } document.write('</ol>'); </script> this example outputs the following into the page when it loads: siblings of div-03 1.
...div polyfills polyfill for internet explorer 8 this property is unsupported prior to ie9, so the following snippet can be used to add support to ie8: // source: https://github.com/alhadis/snippets/blob/master/js/polyfills/ie8-child-elements.js if(!("previouselementsibling" in document.documentelement)){ object.defineproperty(element.prototype, "previouselementsibling", { get: function(){ var e = this.previoussibling; while(e && 1 !== e.nodetype) e = e.previoussibling; return e; } }); } polyfill for internet explorer 9+ and safari // source: https://github.com/jserz/js_piece/blob/master/dom/nondocumenttypechildnode/previouselementsibling/previouselementsibling.md (function (arr) { arr.foreach(function (item) { if (item...
...And 5 more matches
ParentNode.firstElementChild - Web APIs
Web › API › ParentNode › firstElementChild
the parentnode.firstelementchild read-only property returns the object's first child element, or null if there are no child elements.
... this property was initially defined in the elementtraversal pure interface.
...in this case, firstelementchild moved to parentnode.
...And 5 more matches
SVGAnimateTransformElement - Web APIs
Web › API › SVGAnimateTransformElement
the svganimatetransformelement interface corresponds to the <animatetransform> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svganimationelement" target="_top"><rect x="291" y="65" width="190" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="386" y="94" font-size="12px" font-fam...
...And 5 more matches
SVGClipPathElement - Web APIs
Web › API › SVGClipPathElement
the svgclippathelement interface provides access to the properties of <clippath> elements, as well as methods to manipulate them.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgclippathelement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-f...
...And 5 more matches
SVGCursorElement - Web APIs
Web › API › SVGCursorElement
the svgcursorelement interface provides access to the properties of <cursor> elements, as well as methods to manipulate them.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgcursorelement" target="_top"><rect x="321" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="401" y="94" font-size="12px" font-fam...
...And 5 more matches
SVGDefsElement - Web APIs
Web › API › SVGDefsElement
the svgdefselement interface corresponds to the <defs> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 5 more matches
SVGFEComponentTransferElement - Web APIs
Web › API › SVGFEComponentTransferElement
the svgfecomponenttransferelement interface corresponds to the <fecomponenttransfer> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfecomponenttransferelement" target="_top"><rect x="191" y="65" width="290" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="336" y="94" font-size="1...
...And 5 more matches
SVGFEFuncAElement - Web APIs
Web › API › SVGFEFuncAElement
the svgfefuncaelement interface corresponds to the <fefunca> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgcomponenttransferfunctionelement" target="_top"><rect x="131" y="65" width="350" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="306" y="94" font-size...
...And 5 more matches
SVGFEFuncBElement - Web APIs
Web › API › SVGFEFuncBElement
the svgfefuncbelement interface corresponds to the <fefuncb> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgcomponenttransferfunctionelement" target="_top"><rect x="131" y="65" width="350" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="306" y="94" font-size...
...And 5 more matches
SVGFEFuncGElement - Web APIs
Web › API › SVGFEFuncGElement
the svgfefuncgelement interface corresponds to the <fefuncg> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgcomponenttransferfunctionelement" target="_top"><rect x="131" y="65" width="350" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="306" y="94" font-size...
...And 5 more matches
SVGFEFuncRElement - Web APIs
Web › API › SVGFEFuncRElement
the svgfefuncrelement interface corresponds to the <fefuncr> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgcomponenttransferfunctionelement" target="_top"><rect x="131" y="65" width="350" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="306" y="94" font-size...
...And 5 more matches
SVGFEMergeNodeElement - Web APIs
Web › API › SVGFEMergeNodeElement
the svgfemergenodeelement interface corresponds to the <femergenode> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfemergenodeelement" target="_top"><rect x="271" y="65" width="210" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="376" y="94" font-size="12px" fon...
...And 5 more matches
SVGFETileElement - Web APIs
Web › API › SVGFETileElement
the svgfetileelement interface corresponds to the <fetile> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfetileelement" target="_top"><rect x="321" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="401" y="94" font-size="12px" font-fam...
...And 5 more matches
SVGPolygonElement - Web APIs
Web › API › SVGPolygonElement
the svgpolygonelement interface provides access to the properties of <polygon> elements, as well as methods to manipulate them.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 5 more matches
SVGPolylineElement - Web APIs
Web › API › SVGPolylineElement
the svgpolylineelement interface provides access to the properties of <polyline> elements, as well as methods to manipulate them.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 5 more matches
SVGScriptElement - Web APIs
Web › API › SVGScriptElement
the svgscriptelement interface corresponds to the svg <script> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgscriptelement" target="_top"><rect x="321" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="401" y="94" font-size="12px" font-fam...
...And 5 more matches
SVGSetElement - Web APIs
Web › API › SVGSetElement
the svgsetelement interface corresponds to the <set> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svganimationelement" target="_top"><rect x="291" y="65" width="190" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="386" y="94" font-size="12px" font-fam...
...And 5 more matches
SVGStopElement - Web APIs
Web › API › SVGStopElement
the svgstopelement interface corresponds to the <stop> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgstopelement" target="_top"><rect x="341" y="65" width="140" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-famil...
...And 5 more matches
SVGSymbolElement - Web APIs
Web › API › SVGSymbolElement
the svgsymbolelement interface corresponds to the <symbol> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgsymbolelement" target="_top"><rect x="321" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="401" y="94" font-size="12px" font-fam...
...And 5 more matches
SVGTSpanElement - Web APIs
Web › API › SVGTSpanElement
the svgtspanelement interface represents a <tspan> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svggraphicselement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-fami...
...And 5 more matches
Window.customElements - Web APIs
Web › API › Window › customElements
the customelements read-only property of the window interface returns a reference to the customelementregistry object, which can be used to register new custom elements and get information about previously registered custom elements.
... examples the most common example you'll see of this property being used is to get access to the customelementregistry.define() method to define and register a new custom element, e.g.: let customelementregistry = window.customelements; customelementregistry.define('my-custom-element', mycustomelement); however, it is usually shortened to something like the following: customelements.define('element-details', class extends htmlelement { constructor() { super(); const template = document .getelementbyid('element-details-template') .content; const shadowroot = this.attachshadow({mode: 'open'}) .appendchild(template.clonenode(true)); } } ); see our web-components-examples repo for more usage examples.
... specification specification status comment html living standardthe definition of 'window.customelements' in that specification.
...And 5 more matches
Pseudo-elements - CSS: Cascading Style Sheets
Web › CSS › Pseudo-elements
a css pseudo-element is a keyword added to a selector that lets you style a specific part of the selected element(s).
... /* the first line of every <p> element.
... */ p::first-line { color: blue; text-transform: uppercase; } note: in contrast to pseudo-elements, pseudo-classes can be used to style an element based on its state.
...And 5 more matches
<applet>: The Embed Java Applet element - HTML: Hypertext Markup Language
Web › HTML › Element › applet
the <applet> element was removed in gecko 56 and chrome 47.
... the obsolete html applet element (<applet>) embeds a java applet into the document; this element has been deprecated in favor of <object>.
... permitted content zero or more <param> elements, then transparent.
...And 5 more matches
<del>: The Deleted Text element - HTML: Hypertext Markup Language
Web › HTML › Element › del
the html <del> element represents a range of text that has been deleted from a document.
...the <ins> element can be used for the opposite purpose: to indicate text that has been added to the document.
... this element is often (but need not be) rendered by applying a strike-through style to the text.
...And 5 more matches
<dt>: The Description Term element - HTML: Hypertext Markup Language
Web › HTML › Element › dt
the html <dt> element specifies a term in a description or definition list, and as such must be used inside a <dl> element.
... it is usually followed by a <dd> element; however, multiple <dt> elements in a row indicate several terms that are all defined by the immediate next <dd> element.
... the subsequent <dd> (description details) element provides the definition or other related text associated with the term specified using <dt>.
...And 5 more matches
<mark>: The Mark Text element - HTML: Hypertext Markup Language
Web › HTML › Element › mark
the html mark text element (<mark>) represents text which is marked or highlighted for reference or notation purposes, due to the marked passage's relevance or importance in the enclosing context.
... permitted parents any element that accepts phrasing content.
... implicit aria role no corresponding role permitted aria roles any dom interface htmlelement attributes this element only includes the global attributes.
...And 5 more matches
<option>: The HTML Option element - HTML: Hypertext Markup Language
Web › HTML › Element › option
the html <option> element is used to define an item contained in a <select>, an <optgroup>, or a <datalist> element.
...the end tag is optional if this element is immediately followed by another <option> element or an <optgroup>, or if the parent element has no more content.
... permitted parents a <select>, an <optgroup> or a <datalist> element.
...And 5 more matches
<rp>: The Ruby Fallback Parenthesis element - HTML: Hypertext Markup Language
Web › HTML › Element › rp
the html ruby fallback parenthesis (<rp>) element is used to provide fall-back parentheses for browsers that do not support display of ruby annotations using the <ruby> element.
... one <rp> element should enclose each of the opening and closing parentheses that wrap the <rt> element that contains the annotation's text.
... permitted content text tag omission the end tag can be omitted if the element is immediately followed by an <rt> or another <rp> element, or if there is no more content in the parent element.
...And 5 more matches
Mapping the width and height attributes of media container elements to their aspect-ratio - Web media technologies
Web › Media › images › aspect ratio mapping
jank problems when loading images in the olden days of web development, it was always seen as a good practice to add width and height attributes to your html <img> elements, so that when browsers first loaded the page, they could put a correctly-sized placeholder box in the layout for each image to appear in when it finally loads.
...firefox has added an internal aspect-ratio property (in version 69 onwards) that applies to replaced elements, and other related elements that accept width and height attributes.
... this appears in the browser's internal ua stylesheet, similar to the following: img, input[type="image"], video, embed, iframe, marquee, object, table { aspect-ratio: attr(width) / attr(height); } this actually affects any element that acts as a container for complex or mixed visual media — <embed>, <iframe>, <marquee>, <object>, <table>, and <video>, in addition to actual images (<img> and <input type="image">).
...And 5 more matches
XSLT elements reference - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes there are two types of elements discussed here: top-level elements and instructions.
... a top-level element must appear as the child of either <xsl:stylesheet> or <xsl:transform>.
...a third type of element, not discussed here, is the literal result element (lre).
...And 5 more matches
Adding more elements - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Adding More Elements
adding elements to our find files example we will add some more elements to the find files dialog now.
...a spacer has been added in between each element to separate them.
...if you resize the window vertically, the elements do not change size.
...And 4 more matches
XForms Alert Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Alert
the message of the alert element can exist in instance data, in a remote document, or as inline text.
... if more than one source of message is specified in this element, the order of precedence is: single node binding attributes, linking attributes, inline text.
... attributes single-node binding linking src - url of a document whose contents will be retrieved by the alert element and used to provide the alert message for the containing form control.
...And 4 more matches
JS_DefineElement
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS DefineElement
syntax /* added in spidermonkey 38 (jsapi 32) */ bool js_defineelement(jscontext *cx, js::handleobject obj, uint32_t index, js::handlevalue value, unsigned attrs, jsnative getter = nullptr, jsnative setter = nullptr); bool js_defineelement(jscontext *cx, js::handleobject obj, uint32_t index, js::handleobject value, unsigned attrs, jsnative getter = nullptr, jsnative setter = nullptr); bool js_defineelement(jscontext *cx, js::handleobject obj, uint32_t index, js::handlestring value, unsigned attrs, jsnative getter = nullptr, jsnative setter = nullptr); bool js_defineelement(jsconte...
...xt *cx, js::handleobject obj, uint32_t index, int32_t value, unsigned attrs, jsnative getter = nullptr, jsnative setter = nullptr); bool js_defineelement(jscontext *cx, js::handleobject obj, uint32_t index, uint32_t value, unsigned attrs, jsnative getter = nullptr, jsnative setter = nullptr); bool js_defineelement(jscontext *cx, js::handleobject obj, uint32_t index, double value, unsigned attrs, jsnative getter = nullptr, jsnative setter = nullptr); /* obsolete since jsapi 32 */ js_defineelement(jscontext *cx, jsobject *obj, uint32_t index, jsval value, jspropertyop getter, jsstrictpropertyop setter, unsigned attrs); ...
...obsolete since jsapi 32 description js_defineelement defines a numeric property for a specified object, obj.
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Select and highlight elements - Firefox Developer Tools
Tools › Page Inspector › How to › Select and highlight elements
the selected element is the element in the page that the inspector is currently focused on.
... the selected element is shown in the html pane and its css is displayed in the css pane.
... the highlighted element is the element that's overlaid in the page with a graphic showing the box model, and a tooltip showing its tag and size: with the context menu to open the inspector and select an element immediately, activate the context menu over the element in the page and select "inspect element": with the html pane when the inspector is open, as you move the mouse around the elements listed in the html pane, the corresponding elements are highlighted in the page.
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Document.registerElement() - Web APIs
Web › API › Document › registerElement
warning: document.registerelement() is deprecated in favor of customelements.define().
... the document.registerelement() method registers a new custom element in the browser and returns a constructor for the new element.
... syntax var constructor = document.registerelement(tag-name, options); parameters tag-name the name of the custom element.
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Locating DOM elements using selectors - Web APIs
Web › API › Document Object Model › Locating DOM elements using selectors
the selectors api provides methods that make it quick and easy to retrieve element nodes from the dom by matching against a set of selectors.
... the nodeselector interface this specification adds two new methods to any objects implementing the document, documentfragment, or element interfaces: queryselector() returns the first matching element node within the node's subtree.
... queryselectorall() returns a nodelist containing all matching element nodes within the node's subtree, or an empty nodelist if no matches are found.
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Element.closest() - Web APIs
Web › API › Element › closest
the closest() method traverses the element and its parents (heading toward the document root) until it finds a node that matches the provided selector string.
...if no such element exists, it returns null.
... syntax var closestelement = targetelement.closest(selectors); parameters selectors is a domstring containing a selector list.
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Element.localName - Web APIs
Web › API › Element › localName
the element.localname read-only property returns the local part of the qualified name of an element.
... syntax name = element.localname return value a domstring representing the local part of the element's qualified name.
... example (must be served with xml content type, such as text/xml or application/xhtml+xml.) <html xmlns="http://www.w3.org/1999/xhtml" xmlns:svg="http://www.w3.org/2000/svg"> <head> <script type="application/javascript"><![cdata[ function test() { var text = document.getelementbyid('text'); var circle = document.getelementbyid('circle'); text.value = "<svg:circle> has:\n" + "localname = '" + circle.localname + "'\n" + "namespaceuri = '" + circle.namespaceuri + "'"; } ]]></script> </head> <body onload="test()"> <svg:svg version="1.1" width="100px" height="100px" viewbox="0 0 100 100"> <svg:circle cx="50" cy="50" r="30" style="fill:#aaa" id="circle"/> </svg:svg> <textarea id="text" rows="4" cols="55"/> </body> </html>...
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Element: mouseenter event - Web APIs
Web › API › Element › mouseenter event
the mouseenter event is fired at an element when a pointing device (usually a mouse) is initially moved so that its hotspot is within the element at which the event was fired.
... one mouseenter event is sent to each element of the hierarchy when entering them.
... here 4 events are sent to the four elements of the hierarchy when the pointer reaches the text.
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Element: mouseleave event - Web APIs
Web › API › Element › mouseleave event
the mouseleave event is fired at an element when the cursor of a pointing device (usually a mouse) is moved out of it.
...this means that mouseleave is fired when the pointer has exited the element and all of its descendants, whereas mouseout is fired when the pointer leaves the element or leaves one of the element's descendants (even if the pointer is still within the element).
... one mouseleave event is sent to each element of the hierarchy when leaving them.
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Element.namespaceURI - Web APIs
Web › API › Element › namespaceURI
the element.namespaceuri read-only property returns the namespace uri of the element, or null if the element is not in a namespace.
... syntax namespace = element.namespaceuri example in this snippet, an element is being examined for its localname and its namespaceuri.
... if (element.localname == "browser" && element.namespaceuri == "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul") { // this is a xul browser } notes this is not a computed value that is the result of a namespace lookup based on an examination of the namespace declarations in scope.
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Element.scrollIntoViewIfNeeded() - Web APIs
Web › API › Element › scrollIntoViewIfNeeded
the element.scrollintoviewifneeded() method scrolls the current element into the visible area of the browser window if it's not already within the visible area of the browser window.
... if the element is already within the visible area of the browser window, then no scrolling takes place.
... this method is a proprietary variation of the standard element.scrollintoview() method.
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Element.scrollLeft - Web APIs
Web › API › Element › scrollLeft
the element.scrollleft property gets or sets the number of pixels that an element's content is scrolled from its left edge.
... if the element's direction is rtl (right-to-left), then scrollleft is 0 when the scrollbar is at its rightmost position (at the start of the scrolled content), and then increasingly negative as you scroll towards the end of the content.
... syntax getting the value // get the number of pixels scrolled var sleft = element.scrollleft; sleft is an integer representing the number of pixels that element has been scrolled from the left edge.
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ElementCSSInlineStyle.style - Web APIs
Web › API › ElementCSSInlineStyle › style
the style property is used to get as well as set the inline style of an element.
... when getting, it returns a cssstyledeclaration object that contains a list of all styles properties for that element with values assigned for the attributes that are defined in the element's inline style attribute.
...for adding specific styles to an element without altering other style values, it is preferred to use the individual properties of style (as in elt.style.color = '...') as using elt.style.csstext = '...' or elt.setattribute('style', '...') sets the complete inline style for the element by overriding the existing inline styles.
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HTMLCanvasElement.getContext() - Web APIs
Web › API › HTMLCanvasElement › getContext
the htmlcanvaselement.getcontext() method returns a drawing context on the canvas, or null if the context identifier is not supported.
... later calls to this method on the same canvas element return the same drawing context instance as was returned the last time the method was invoked with the same contexttype argument.
... to get a different drawing context object you need to pass a different contexttype or call the method on a different canvas element.
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HTMLDataListElement - Web APIs
Web › API › HTMLDataListElement
the htmldatalistelement interface provides special properties (beyond the htmlelement object interface it also has available to it by inheritance) to manipulate <datalist> elements and their content.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmldatalistelement" target="_top"><rect x="301" y="65" width="190" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" fon...
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HTMLElement.offsetWidth - Web APIs
Web › API › HTMLElement › offsetWidth
the htmlelement.offsetwidth read-only property returns the layout width of an element as an integer.
... typically, offsetwidth is a measurement in pixels of the element's css width, including any borders, padding, and vertical scrollbars (if rendered).
... it does not include the width of pseudo-elements such as ::before or ::after.
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HTMLFontElement - Web APIs
Web › API › HTMLFontElement
implements the document object model (dom) representation of the font element.
... the html font element <font> defines the font size, font face and color of text.
... properties inherits properties from its parent, htmlelement.
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HTMLKeygenElement - Web APIs
Web › API › HTMLKeygenElement
note: this page describes the keygen element interface as specified, not as currently implemented by gecko.
... the <keygen> elements expose the htmlkeygenelement interface, which provides special properties and methods (beyond the regular element object interface they also have available to them by inheritance) for manipulating the layout and presentation of keygen elements.
... form read only is a htmlformelement that indicates the control's form owner, reflecting the form html attribute if it is defined.
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HTMLTableElement.tFoot - Web APIs
Web › API › HTMLTableElement › tFoot
the htmltableelement.tfoot property represents the <tfoot> element of a <table>.
... its value will be null if there is no such element.
... syntax htmltablesectionelementobject = table.tfoot table.tfoot = htmltablesectionelementobject example if (table.tfoot == my_foot) { // ...
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HTMLTableElement.tHead - Web APIs
Web › API › HTMLTableElement › tHead
the htmltableelement.thead represents the <thead> element of a <table> .
... its value will be null if there is no such element.
... syntax thead_element = table.thead; table.thead = thead_element; parameters thead_element is a htmltablesectionelement.
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HTMLUnknownElement - Web APIs
Web › API › HTMLUnknownElement
the htmlunknownelement interface represents an invalid html element and derives from the htmlelement interface, but without implementing any additional properties or methods.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlunknownelement" target="_top"><rect x="311" y="65" width="180" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="401" y="94" font-size="12px" font...
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ParentNode.lastElementChild - Web APIs
Web › API › ParentNode › lastElementChild
the parentnode.lastelementchild read-only property returns the object's last child element or null if there are no child elements.
... note: this property was initially defined in the elementtraversal pure interface.
...in this case, lastelementchild moved to parentnode.
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SVGAnimateElement - Web APIs
Web › API › SVGAnimateElement
the svganimateelement interface corresponds to the <animate> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svganimationelement" target="_top"><rect x="291" y="65" width="190" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="386" y="94" font-size="12px" font-fam...
...And 4 more matches
SVGAnimateMotionElement - Web APIs
Web › API › SVGAnimateMotionElement
the svganimatemotionelement interface corresponds to the <animatemotion> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svganimationelement" target="_top"><rect x="291" y="65" width="190" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="386" y="94" font-size="12px" font-fam...
...And 4 more matches
SVGDescElement - Web APIs
Web › API › SVGDescElement
the svgdescelement interface corresponds to the <desc> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgdescelement" target="_top"><rect x="341" y="65" width="140" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-famil...
...And 4 more matches
SVGFEFloodElement - Web APIs
Web › API › SVGFEFloodElement
the svgfefloodelement interface corresponds to the <feflood> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfefloodelement" target="_top"><rect x="311" y="65" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" font-fa...
...And 4 more matches
SVGFEMergeElement - Web APIs
Web › API › SVGFEMergeElement
the svgfemergeelement interface corresponds to the <femerge> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgfemergeelement" target="_top"><rect x="311" y="65" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" font-fa...
...And 4 more matches
SVGMPathElement - Web APIs
Web › API › SVGMPathElement
the svgmpathelement interface corresponds to the <mpath> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgmpathelement" target="_top"><rect x="331" y="65" width="150" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="406" y="94" font-size="12px" font-fami...
...And 4 more matches
SVGMetadataElement - Web APIs
Web › API › SVGMetadataElement
the svgmetadataelement interface corresponds to the <metadata> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgmetadataelement" target="_top"><rect x="301" y="65" width="180" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="391" y="94" font-size="12px" font-f...
...And 4 more matches
SVGTitleElement - Web APIs
Web › API › SVGTitleElement
the svgtitleelement interface corresponds to the <title> element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgelement" target="_top"><rect x="381" y="1" width="100" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="431" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgelement</text></a><polyline points="481,25 491,20 491,30 481,25" stroke="#d4dde4" fill="none"/><line x1="491" y1="25" x2="499" y2="25" stroke="#d4dde4"/><line x1="499" y1="25" x2="499" y2="90" stroke="#d4dde4"/><line x1="499" y1="90" x2="482" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/svgtitleelement" target="_top"><rect x="331" y="65" width="150" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="406" y="94" font-size="12px" font-fami...
...And 4 more matches
SVGViewElement - Web APIs
Web › API › SVGViewElement
the svgviewelement interface provides access to the properties of <view> elements, as well as methods to manipulate them.
... properties this interface also inherits properties from its parent interface, svgelement.
... svgviewelement.viewtarget an svgstringlist corresponding to the viewtarget attribute of the given <view> element.
...And 4 more matches
WebGL2RenderingContext.drawRangeElements() - Web APIs
Web › API › WebGL2RenderingContext › drawRangeElements
the webgl2renderingcontext.drawrangeelements() method of the webgl api renders primitives from array data in a given range.
... syntax void gl.drawrangeelements(mode, start, end, count, type, offset); parameters mode a glenum specifying the type primitive to render.
... count a glsizei specifying the number of elements to be rendered.
...And 4 more matches
WebGLRenderingContext.drawElements() - Web APIs
Web › API › WebGLRenderingContext › drawElements
the webglrenderingcontext.drawelements() method of the webgl api renders primitives from array data.
... syntax void gl.drawelements(mode, count, type, offset); parameters mode a glenum specifying the type primitive to render.
... count a glsizei specifying the number of elements to be rendered.
...And 4 more matches
<caption>: The Table Caption element - HTML: Hypertext Markup Language
Web › HTML › Element › caption
the html <caption> element specifies the caption (or title) of a table.
... tag omission the end tag can be omitted if the element is not immediately followed by ascii whitespace or a comment.
... permitted parents a <table> element, as its first descendant.
...And 4 more matches
<command>: The HTML Command element - HTML: Hypertext Markup Language
Web › HTML › Element › command
the html command element (<command>) represents a command which the user can invoke.
... the <command> element is included in the w3c specification, but not in the whatwg specification, and browser support is nonexistent.
... you should use the <menuitem> element instead, although that element is non-standard and only supported in edge and firefox.
...And 4 more matches
<dir>: The Directory element (obsolete) - HTML: Hypertext Markup Language
Web › HTML › Element › dir
the obsolete html directory element (<dir>) is used as a container for a directory of files and/or folders, potentially with styles and icons applied by the user agent.
... do not use this obsolete element; instead, you should use the <ul> element for lists, including lists of files.
... usage note: do not use this element.
...And 4 more matches
<figure>: The Figure with Optional Caption element - HTML: Hypertext Markup Language
Web › HTML › Element › figure
the html <figure> (figure with optional caption) element represents self-contained content, potentially with an optional caption, which is specified using the (<figcaption>) element.
... permitted content a <figcaption> element, followed by flow content; or flow content followed by a <figcaption> element; or flow content.
... permitted parents any element that accepts flow content.
...And 4 more matches
<meter>: The HTML Meter element - HTML: Hypertext Markup Language
Web › HTML › Element › meter
the html <meter> element represents either a scalar value within a known range or a fractional value.
... permitted content phrasing content, but there must be no <meter> element among its descendants.
... permitted parents any element that accepts phrasing content.
...And 4 more matches
<nav>: The Navigation Section element - HTML: Hypertext Markup Language
Web › HTML › Element › nav
the html <nav> element represents a section of a page whose purpose is to provide navigation links, either within the current document or to other documents.
... permitted parents any element that accepts flow content.
... implicit aria role navigation permitted aria roles no role permitted dom interface htmlelement attributes this element only includes the global attributes.
...And 4 more matches
<nextid>: The NeXT ID element (Obsolete) - HTML: Hypertext Markup Language
Web › HTML › Element › nextid
<nextid> is an obsolete html element that served to enable the next web designing tool to generate automatic name labels for its anchors.
...this element has the distinction of being the first element to become one of the "lost tags" by being eliminated from the official public dtd's of the html versions.
... it is also probably one of the least understood of all of the early html elements.
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<progress>: The Progress Indicator element - HTML: Hypertext Markup Language
Web › HTML › Element › progress
the html <progress> element displays an indicator showing the completion progress of a task, typically displayed as a progress bar.
... permitted content phrasing content, but there must be no <progress> element among its descendants.
... permitted parents any element that accepts phrasing content.
...And 4 more matches
TypeError: can't delete non-configurable array element - JavaScript
Web › JavaScript › Reference › Errors › Non configurable array element
the javascript exception "can't delete non-configurable array element" occurs when it was attempted to shorten the length of an array, but one of the array's elements is non-configurable.
... message typeerror: can't delete non-configurable array element (firefox) typeerror: cannot delete property '2' of [object array] (chrome) error type typeerror what went wrong?
... it was attempted to shorten the length of an array, but one of the array's elements is non-configurable.
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SVG element reference - SVG: Scalable Vector Graphics
Web › SVG › Element
« svg / svg attribute reference » svg drawings and images are created using a wide array of elements which are dedicated to the construction, drawing, and layout of vector images and diagrams.
... here you'll find reference documentation for each of the svg elements.
... svg elements a to z a <a> <animate> <animatemotion> <animatetransform> c <circle> <clippath> <color-profile> d <defs> <desc> <discard> e <ellipse> f <feblend> <fecolormatrix> <fecomponenttransfer> <fecomposite> <feconvolvematrix> <fediffuselighting> <fedisplacementmap> <fedistantlight> <fedropshadow> <feflood> <fefunca> <fefuncb> <fefuncg> <fefuncr> <fegaussianblur> <feimage> <femerge> <femergenode> <femorphology> <feoffset> <fepointlight> <fespecularlighting> <fespotlight> <fetile> <feturbulence> <filter> <foreignobject> g <g> h <hatch> <hatchpath> i <image> l <line> <lineargradient> m <marker> <mask> <mesh> <meshgradient> <meshpatch> <meshrow> <metadata> <mpath> p <path> <pattern> <polygon> <po...
...And 4 more matches
XForms Output Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Output
introduction serves to show the instance data that the element is bound to in a read-only manner (see the spec).
... type restrictions the output element can be bound to a node containing simple content of any data type.
... representations the xforms output element can be represented by the following widgets for the specified data types (or types derived from these data types): text - default representation for instance data of most types, especially static text (xhtml/xul).
...And 3 more matches
nsIDOMHTMLSourceElement
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMHTMLSourceElement
the nsidomhtmlsourceelement interface is the dom interface to the source child of the audio and video media elements in html.
... dom/interfaces/html/nsidomhtmlsourceelement.idlscriptable please add a summary to this article.
... last changed in gecko 1.9.1.2 inherits from: nsidomhtmlelement the source element allows authors to specify multiple media resources for media elements.
...And 3 more matches
DocumentOrShadowRoot.elementsFromPoint() - Web APIs
Web › API › DocumentOrShadowRoot › elementsFromPoint
the elementsfrompoint() method of the documentorshadowroot interface returns an array of all elements at the specified coordinates (relative to the viewport).
... it operates in a similar way to the elementfrompoint() method.
... syntax const elements = document.elementsfrompoint(x, y); parameters x the horizontal coordinate of a point.
...And 3 more matches
Element.getAnimations() - Web APIs
Web › API › Element › getAnimations
the getanimations() method of the element interface (specified on the animatable mixin) returns an array of all animation objects affecting this element or which are scheduled to do so in future.
... it can optionally return animation objects for descendant elements too.
... syntax const animations = element.getanimations(options); parameters options optional an options object containing the following property: subtree a boolean value which, if true, causes animations that target descendants of element to be returned as well.
...And 3 more matches
Element.getAttributeNode() - Web APIs
Web › API › Element › getAttributeNode
returns the specified attribute of the specified element, as an attr node.
... syntax var attrnode = element.getattributenode(attrname); attrnode is an attr node for the attribute.
... example // html: <div id="top" /> let t = document.getelementbyid("top"); let idattr = t.getattributenode("id"); alert(idattr.value == "top") notes when called on an html element in a dom flagged as an html document, getattributenode lower-cases its argument before proceeding.
...And 3 more matches
Element.hasAttribute() - Web APIs
Web › API › Element › hasAttribute
the element.hasattribute() method returns a boolean value indicating whether the specified element has the specified attribute or not.
... syntax var result = element.hasattribute(name); result holds the return value true or false.
... example var foo = document.getelementbyid("foo"); if (foo.hasattribute("bar")) { // do something } polyfill ;(function(prototype) { prototype.hasattribute = prototype.hasattribute || function(name) { return !!(this.attributes[name] && this.attributes[name].specified); } })(element.prototype); notes dom methods dealing with element's attributes: not namespace-aware, most commonly used methods namespace-aware variants (dom level 2) dom level 1 methods for dealing with attr nodes directly (seldom used) dom level 2 namespace-aware methods for dealing with attr nodes directly (seldom used) setattribute (dom 1) setattributens setattributenode setattributenodens getattribute (dom 1) getatt...
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Element.hasPointerCapture() - Web APIs
Web › API › Element › hasPointerCapture
the haspointercapture() method of the element interface sets whether the element on which it is invoked has pointer capture for the pointer identified by the given pointer id.
... syntax targetelement.haspointercapture(pointerid); parameters pointerid the pointerid of a pointerevent object.
... return value a boolean value — true if the element does have pointer capture, false if it doesn't.
...And 3 more matches
Element.name - Web APIs
Web › API › Element › name
name gets or sets the name property of an element in the dom.
... it only applies to the following elements: <a>, <applet>, <button>, <form>, <frame>, <iframe>, <img>, <input>, <map>, <meta>, <object>, <param>, <select>, and <textarea>.
... note: the name property doesn't exist for other elements; unlike tagname and nodename, it is not a property of the node, element or htmlelement interfaces.
...And 3 more matches
Element.setAttributeNode() - Web APIs
Web › API › Element › setAttributeNode
the setattributenode() method adds a new attr node to the specified element.
... syntax var replacedattr = element.setattributenode(attribute); attribute is the attr node to set on the element.
... example this example copies the align attribute from one element to another.
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Element.setCapture() - Web APIs
Web › API › Element › setCapture
call this method during the handling of a mousedown event to retarget all mouse events to this element until the mouse button is released or document.releasecapture() is called.
... warning: this interface never had much cross-browser support and you probably looking for element.setpointercapture instead, from the pointer events api.
... syntax element.setcapture(retargettoelement); retargettoelement if true, all events are targeted directly to this element; if false, events can also fire at descendants of this element.
...And 3 more matches
HTMLCanvasElement.toDataURL() - Web APIs
Web › API › HTMLCanvasElement › toDataURL
the htmlcanvaselement.todataurl() method returns a data uri containing a representation of the image in the format specified by the type parameter (defaults to png).
... examples given this <canvas> element: <canvas id="canvas" width="5" height="5"></canvas> you can get a data-url of the canvas with the following lines: var canvas = document.getelementbyid('canvas'); var dataurl = canvas.todataurl(); console.log(dataurl); // "data:image/png;base64,ivborw0kggoaaaansuheugaaaauaaaafcayaaacnby // blaaaadeleqvqimwngobmaaabpaafei8araaaaaelftksuqmcc" setting image quality with jpegs var fullquality ...
...lass="grayscale" src="mypicture.png" alt="description of my picture" /> javascript window.addeventlistener('load', removecolors); function showcolorimg() { this.style.display = 'none'; this.nextsibling.style.display = 'inline'; } function showgrayimg() { this.previoussibling.style.display = 'inline'; this.style.display = 'none'; } function removecolors() { var aimages = document.getelementsbyclassname('grayscale'), nimgslen = aimages.length, ocanvas = document.createelement('canvas'), octx = ocanvas.getcontext('2d'); for (var nwidth, nheight, oimgdata, ograyimg, npixel, apix, npixlen, nimgid = 0; nimgid < nimgslen; nimgid++) { ocolorimg = aimages[nimgid]; nwidth = ocolorimg.offsetwidth; nheight = ocolorimg.offsetheight; ocanvas.width = nwidth; ...
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HTMLContentElement - Web APIs
Web › API › HTMLContentElement
the htmlcontentelement interface represents a <content> html element, which is used in shadow dom.
... properties this interface inherits the properties of htmlelement.
... htmlcontentelement.select is a domstring that reflects the select html attribute.
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HTMLDetailsElement - Web APIs
Web › API › HTMLDetailsElement
the htmldetailselement interface provides special properties (beyond the regular htmlelement interface it also has available to it by inheritance) for manipulating <details> elements.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 20%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 120" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/htmldetailselement" target="_top"><rect x="1" y="1" width="180" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="91" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmldetailselement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties inherits properties from its parent, htmlelement.
... htmldetailselement.open is a boolean reflecting the open html attribute, indicating whether or not the element’s contents (not counting the <summary>) is to be shown to the user.
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HTMLDialogElement.showModal() - Web APIs
Web › API › HTMLDialogElement › showModal
the showmodal() method of the htmldialogelement interface displays the dialog as a modal, over the top of any other dialogs that might be present.
... it displays into the top layer, along with a ::backdrop pseudo-element.
...if the open attribute is already set on the <dialog> element), an invalidstateerror is thrown.
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HTMLElement: change event - Web APIs
Web › API › HTMLElement › change event
the change event is fired for <input>, <select>, and <textarea> elements when an alteration to the element's value is committed by the user.
... unlike the input event, the change event is not necessarily fired for each alteration to an element's value.
... bubbles yes cancelable no interface event event handler property onchange depending on the kind of element being changed and the way the user interacts with the element, the change event fires at a different moment: when the element is :checked (by clicking or using the keyboard) for <input type="radio"> and <input type="checkbox">; when the user commits the change explicitly (e.g., by selecting a value from a <select>'s dropdown with a mouse click, by selecting a date from a date picker for <input type="date">, by selecting a file in the file picker for <input type="file">, etc.); when the element loses focus after its value was changed, but not commited (e.g., after editing the value of <textarea> or <input type="text">).
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HTMLElement.contentEditable - Web APIs
Web › API › HTMLElement › contentEditable
the contenteditable property of the htmlelement interface specifies whether or not the element is editable.
... this enumerated attribute can have the following values: 'true' indicates that the element is contenteditable.
... 'false' indicates that the element cannot be edited.
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HTMLElement.dir - Web APIs
Web › API › HTMLElement › dir
the htmlelement.dir property gets or sets the text writing directionality of the content of the current element.
... the text writing directionality of an element is which direction that text goes (for support of different language systems).
... when an element has its dir set to "auto", the direction of the element is determined based on its first strong directionality character, or default to the directionality of its parent element.
...And 3 more matches
HTMLElement.innerText - Web APIs
Web › API › HTMLElement › innerText
the innertext property of the htmlelement interface represents the "rendered" text content of a node and its descendants.
... as a getter, it approximates the text the user would get if they highlighted the contents of the element with the cursor and then copied it to the clipboard.
... syntax const renderedtext = htmlelement.innertext htmlelement.innertext = string value a domstring representing the rendered text content of an element.
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HTMLElement.offsetLeft - Web APIs
Web › API › HTMLElement › offsetLeft
the htmlelement.offsetleft read-only property returns the number of pixels that the upper left corner of the current element is offset to the left within the htmlelement.offsetparent node.
... for block-level elements, offsettop, offsetleft, offsetwidth, and offsetheight describe the border box of an element relative to the offsetparent.
... however, for inline-level elements (such as span) that can wrap from one line to the next, offsettop and offsetleft describe the positions of the first border box (use element.getclientrects() to get its width and height), while offsetwidth and offsetheight describe the dimensions of the bounding border box (use element.getboundingclientrect() to get its position).
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HTMLElement.offsetParent - Web APIs
Web › API › HTMLElement › offsetParent
the htmlelement.offsetparent read-only property returns a reference to the element which is the closest (nearest in the containment hierarchy) positioned ancestor element.
... if there is no positioned ancestor element, the nearest ancestor td, th, table will be returned, or the body if there are no ancestor table elements either.
... note: offsetparent returns null in the following situations: the element or its parent element has the display property set to none.
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HTMLFormElement.length - Web APIs
Web › API › HTMLFormElement › length
the htmlformelement.length read-only property returns the number of controls in the <form> element.
... you can access the list of the form's controls using the elements property.
... this includes both elements that are descendents of the <form> element as well as elements that are made members of the form using their form property.
...And 3 more matches
HTMLImageElement.alt - Web APIs
Web › API › HTMLImageElement › alt
the htmlimageelement property alt provides fallback (alternate) text to display when the image specified by the <img> element is not loaded.
... syntax htmlimageelement.alt = alttext; let alttext = htmlimageelement.alt; value a domstring which contains the alternate text to display when the image is not loaded or for use by assistive devices.
...there are separate attributes and elements designed for those purposes.
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HTMLMediaElement.autoplay - Web APIs
Web › API › HTMLMediaElement › autoplay
the htmlmediaelement.autoplay property reflects the autoplay html attribute, indicating whether playback should automatically begin as soon as enough media is available to do so without interruption.
... a media element whose source is a mediastream and whose autoplay property is true will begin playback when it becomes active (that is, when mediastream.active becomes true).
...however, autoplay can be useful when creating media elements whose source will be set at a later time, under user control.
...And 3 more matches
HTMLMediaElement.error - Web APIs
Web › API › HTMLMediaElement › error
the htmlmediaelement.error is the mediaerror object for the most recent error, or null if there has not been an error.
... when an error event is received by the element, you can determine details about what happened by examining this object.
... syntax var myerror = htmlmediaelement.error; value a mediaerror object describing the most recent error to occur on the media element or null if no errors have occurred.
...And 3 more matches
HTMLMediaElement.play() - Web APIs
Web › API › HTMLMediaElement › play
the htmlmediaelement play() method attempts to begin playback of the media.
... syntax var promise = htmlmediaelement.play(); parameters none.
... example this example demonstrates how to confirm that playback has begun and how to gracefully handle blocked automatic playback: let videoelem = document.getelementbyid("video"); let playbutton = document.getelementbyid("playbutton"); playbutton.addeventlistener("click", handleplaybutton, false); playvideo(); async function playvideo() { try { await videoelem.play(); playbutton.classlist.add("playing"); } catch(err) { playbutton.classlist.remove("playing"); } } function handleplaybutton() { if (videoelem.paused) { playvideo(); } ...
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HTMLMenuElement - Web APIs
Web › API › HTMLMenuElement
the htmlmenuelement interface provides special properties (beyond those defined on the regular htmlelement interface it also has available to it by inheritance) for manipulating <menu> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlmenuelement" target="_top"><rect x="341" y="65" width="150" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="416" y="94" font-size="12px" font-fa...
...And 3 more matches
HTMLOrForeignElement.dataset - Web APIs
Web › API › HTMLOrForeignElement › dataset
the dataset read-only property of the htmlorforeignelement interface provides read/write access to all the custom data attributes (data-*) set on the element.
... accessing values attributes can be set and read by using the camelcase name (the key) like an object property of the dataset, as in element.dataset.keyname attributes can also be set and read using the bracket syntax, as in element.dataset[keyname] the in operator can be used to check whether a given attribute exists.
... syntax const dataattrmap = element.dataset value a domstringmap.
...And 3 more matches
HTMLOrForeignElement.tabIndex - Web APIs
Web › API › HTMLOrForeignElement › tabIndex
the tabindex property of the htmlorforeignelement interface represents the tab order of the current element.
... tab order is as follows: elements with a positive tabindex.
... elements that have identical tabindex values should be navigated in the order they appear.
...And 3 more matches
HTMLPictureElement - Web APIs
Web › API › HTMLPictureElement
the htmlpictureelement interface represents a <picture> html element.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlpictureelement" target="_top"><rect x="311" y="65" width="180" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="401" y="94" font-size="12px" font...
...And 3 more matches
HTMLSelectElement.remove() - Web APIs
Web › API › HTMLSelectElement › remove
the htmlselectelement.remove() method removes the element at the specified index from the options collection for this select element.
... syntax collection.remove(index); parameters index is a long for the index of the htmloptionelement to remove from the collection.
... example var sel = document.getelementbyid("existinglist"); sel.remove(1); /* takes the existing following select object: <select id="existinglist" name="existinglist"> <option value="1">option: value 1</option> <option value="2">option: value 2</option> <option value="3">option: value 3</option> </select> and changes it to: <select id="existinglist" name="existinglist"> <option value="1">option: value 1</option> <option value="3">option: value 3</option> </select> */ specifications specification status comment html living standardthe definition of 'htmlselectelement.remove()' in that specification.
...And 3 more matches
HTMLShadowElement - Web APIs
Web › API › HTMLShadowElement
the htmlshadowelement interface represents a <shadow> html element, which is used in shadow dom.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlshadowelement" target="_top"><rect x="321" y="65" width="170" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="406" y="94" font-size="12px" font-...
...And 3 more matches
HTMLStyleElement.media - Web APIs
Web › API › HTMLStyleElement › media
the htmlstyleelement.media property specifies the intended destination medium for style information.
... example <!doctype html> <html> <head> <link id="linkedstyle" rel="stylesheet" href="document.css" type="text/css" media="screen" /> <style id="inlinestyle" rel="stylesheet" type="text/css" media="screen, print"> p { color: blue; } </style> </head> <body> <script> alert('linkedstyle: ' + document.getelementbyid('linkedstyle').media); // 'screen' alert('inlinestyle: ' + document.getelementbyid('inlinestyle').media); // 'screen, print' </script> </body> </html> specifications specification status comment html living standardthe definition of 'htmlstyleelement' in that specification.
... living standard html 5.1the definition of 'htmlstyleelement' in that specification.
...And 3 more matches
HTMLTableElement.caption - Web APIs
Web › API › HTMLTableElement › caption
the htmltableelement.caption property represents the table caption.
... if no caption element is associated with the table, this property is null.
... syntax var string = tableelement.caption; example if (table.caption) { // do something with the caption } specifications specification status comment html living standardthe definition of 'htmltableelement.caption' in that specification.
...And 3 more matches
SVGAltGlyphElement - Web APIs
Web › API › SVGAltGlyphElement
the svgaltglyphelement interface represents an <altglyph> element.
... properties this interface also inherits properties from its parent interface, svggraphicselement.
... svgaltglyphelement.glyphref it corresponds to the attribute glyphref on the given element.
...And 3 more matches
SVGColorProfileElement - Web APIs
Web › API › SVGColorProfileElement
the svgcolorprofileelement interface corresponds to the <color-profile> element.
... properties svgcolorprofileelement.local a domstring corresponding to the local attribute of the given element.
... svgcolorprofileelement.name a domstring corresponding to the name attribute of the given element.
...And 3 more matches
SVGFontFaceElement - Web APIs
Web › API › SVGFontFaceElement
the svgfontfaceelement interface corresponds to the <font-face> elements.
... object-oriented access to the attributes of the <font-face> element via the svg dom is not possible.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgfontfaceelement" target="_top"><rect x="1" y="1" width="180" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="91" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgfontfaceelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface has no properties but inherits properties from its pare...
...And 3 more matches
SVGFontFaceFormatElement - Web APIs
Web › API › SVGFontFaceFormatElement
the svgfontfaceformatelement interface corresponds to the <font-face-format> elements.
... object-oriented access to the attributes of the <font-face-format> element via the svg dom is not possible.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgfontfaceformatelement" target="_top"><rect x="1" y="1" width="240" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="121" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgfontfaceformatelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface has no properties but inherits properties ...
...And 3 more matches
SVGFontFaceNameElement - Web APIs
Web › API › SVGFontFaceNameElement
the svgfontfacenameelement interface corresponds to the <font-face-name> elements.
... object-oriented access to the attributes of the <font-face-name> element via the svg dom is not possible.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgfontfacenameelement" target="_top"><rect x="1" y="1" width="220" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="111" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgfontfacenameelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface has no properties but inherits properties from...
...And 3 more matches
SVGFontFaceSrcElement - Web APIs
Web › API › SVGFontFaceSrcElement
the svgfontfacesrcelement interface corresponds to the <font-face-src> elements.
... object-oriented access to the attributes of the <font-face-src> element via the svg dom is not possible.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgfontfacesrcelement" target="_top"><rect x="1" y="1" width="210" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="106" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgfontfacesrcelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface has no properties but inherits properties from i...
...And 3 more matches
SVGFontFaceUriElement - Web APIs
Web › API › SVGFontFaceUriElement
the svgfontfaceurielement interface corresponds to the <font-face-uri> elements.
... object-oriented access to the attributes of the <font-face-uri> element via the svg dom is not possible.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgfontfaceurielement" target="_top"><rect x="1" y="1" width="210" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="106" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgfontfaceurielement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface has no properties but inherits properties from i...
...And 3 more matches
SVGGeometryElement.isPointInStroke() - Web APIs
Web › API › SVGGeometryElement › isPointInStroke
the svggeometryelement.ispointinstroke() method determines whether a given point is within the stroke shape of an element.
... normal hit testing rules apply; the value of the pointer-events property on the element determines whether a point is considered to be within the stroke.
... the point argument is interpreted as a point in the local coordiante system of the element.
...And 3 more matches
SVGGlyphElement - Web APIs
Web › API › SVGGlyphElement
the svgglyphelement interface corresponds to the <glyph> element.
... object-oriented access to the attributes of the <glyph> element via the svg dom is not possible.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 11.666666666666666%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 70" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgglyphelement" target="_top"><rect x="1" y="1" width="150" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="76" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgglyphelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} warning: this interface was removed in the svg 2 specification.
...And 3 more matches
SVGHKernElement - Web APIs
Web › API › SVGHKernElement
the svghkernelement interface corresponds to the <hkern> elements.
... object-oriented access to the attributes of the <hkern> element via the svg dom is not possible.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svghkernelement" target="_top"><rect x="1" y="1" width="150" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="76" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svghkernelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface has no properties but inherits properties from its parent, sv...
...And 3 more matches
SVGMissingGlyphElement - Web APIs
Web › API › SVGMissingGlyphElement
the svgmissingglyphelement interface corresponds to the <missing-glyph> elements.
... object-oriented access to the attributes of the <missing-glyph> element via the svg dom is not possible.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgmissingglyphelement" target="_top"><rect x="1" y="1" width="220" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="111" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgmissingglyphelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface has no properties but inherits properties from...
...And 3 more matches
SVGTRefElement - Web APIs
Web › API › SVGTRefElement
the svgtrefelement interface corresponds to the <tref> elements.
... object-oriented access to the attributes of the <tref> element via the svg dom is not possible.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgtrefelement" target="_top"><rect x="1" y="1" width="140" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="71" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgtrefelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface has no properties but inherits properties from its parent, svgt...
...And 3 more matches
SVGVKernElement - Web APIs
Web › API › SVGVKernElement
the svgvkernelement interface corresponds to the <vkern> elements.
... object-oriented access to the attributes of the <vkern> element via the svg dom is not possible.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgvkernelement" target="_top"><rect x="1" y="1" width="150" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="76" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgvkernelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface has no properties but inherits properties from its parent, sv...
...And 3 more matches
<h1>–<h6>: The HTML Section Heading elements - HTML: Hypertext Markup Language
Web › HTML › Element › Heading Elements
the html <h1>–<h6> elements represent six levels of section headings.
... permitted parents any element that accepts flow content; don't use a heading element as a child of the <hgroup> element — it is now deprecated.
... implicit aria role heading permitted aria roles tab, presentation or none dom interface htmlheadingelement attributes these elements only include the global attributes.
...And 3 more matches
<bdo>: The Bidirectional Text Override element - HTML: Hypertext Markup Language
Web › HTML › Element › bdo
the html bidirectional text override element (<bdo>) overrides the current directionality of text, so that the text within is rendered in a different direction.
... permitted parents any element that accepts phrasing content.
... implicit aria role no corresponding role permitted aria roles any dom interface htmlelement up to gecko 1.9.2 (firefox 4) inclusive, firefox implements the htmlspanelement interface for this element.
...And 3 more matches
<big>: The Bigger Text element - HTML: Hypertext Markup Language
Web › HTML › Element › big
the obsolete html big element (<big>) renders the enclosed text at a font size one level larger than the surrounding text (medium becomes large, for example).
... usage note: as it was purely presentational, this element has been removed in html5 and shouldn't be used anymore.
... attributes this element has no other attributes than the global attributes, common to all elements.
...And 3 more matches
<blockquote>: The Block Quotation element - HTML: Hypertext Markup Language
Web › HTML › Element › blockquote
the html <blockquote> element (or html block quotation element) indicates that the enclosed text is an extended quotation.
...a url for the source of the quotation may be given using the cite attribute, while a text representation of the source can be given using the <cite> element.
... permitted parents any element that accepts flow content.
...And 3 more matches
<code>: The Inline Code element - HTML: Hypertext Markup Language
Web › HTML › Element › code
the html <code> element displays its contents styled in a fashion intended to indicate that the text is a short fragment of computer code.
... permitted parents any element that accepts phrasing content.
... implicit aria role no corresponding role permitted aria roles any dom interface htmlelement up to gecko 1.9.2 (firefox 4) inclusive, firefox implements the htmlspanelement interface for this element.
...And 3 more matches
<dialog>: The Dialog element - HTML: Hypertext Markup Language
Web › HTML › Element › dialog
the html <dialog> element represents a dialog box or other interactive component, such as a dismissable alert, inspector, or subwindow.
... permitted parents any element that accepts flow content implicit aria role dialog permitted aria roles alertdialog dom interface htmldialogelement attributes this element includes the global attributes.
... the tabindex attribute must not be used on the <dialog> element.
...And 3 more matches
<hr>: The Thematic Break (Horizontal Rule) element - HTML: Hypertext Markup Language
Web › HTML › Element › hr
the html <hr> element represents a thematic break between paragraph-level elements: for example, a change of scene in a story, or a shift of topic within a section.
...while it may still be displayed as a horizontal rule in visual browsers, this element is now defined in semantic terms, rather than presentational terms, so if you wish to draw a horizontal line, you should do so using appropriate css.
... permitted content none, it is an empty element.
...And 3 more matches
<noframes>: The Frame Fallback element - HTML: Hypertext Markup Language
Web › HTML › Element › noframes
the obsolete html no frames or frame fallback element, <noframes>, provides content to be presented in browsers that don't support (or have disabled support for) the <frame> element.
... a <noframes> element can contain any html elements that are allowed within the body of an html document, with the exception of the <frameset> and <frame> elements, since using frames when they aren't supported doesn't make sense.
... in html 5 and later, <noframes> is obsolete and shouldn't be used, since the <frame> and <frameset> elements are also obsolete.
...And 3 more matches
<p>: The Paragraph element - HTML: Hypertext Markup Language
Web › HTML › Element › p
the html <p> element represents a paragraph.
... paragraphs are block-level elements, and notably will automatically close if another block-level element is parsed before the closing </p> tag.
...the end tag may be omitted if the <p> element is immediately followed by an <address>, <article>, <aside>, <blockquote>, <div>, <dl>, <fieldset>, <footer>, <form>, <h1>, <h2>, <h3>, <h4>, <h5>, <h6>, <header>, <hr>, <menu>, <nav>, <ol>, <pre>, <section>, <table>, <ul> or another <p> element, or if there is no more content in the parent element and the parent element is not an <a> element.
...And 3 more matches
<rt>: The Ruby Text element - HTML: Hypertext Markup Language
Web › HTML › Element › rt
the html ruby text (<rt>) element specifies the ruby text component of a ruby annotation, which is used to provide pronunciation, translation, or transliteration information for east asian typography.
... the <rt> element must always be contained within a <ruby> element.
... see the article about the <ruby> element for more examples.
...And 3 more matches
<rtc>: The Ruby Text Container element - HTML: Hypertext Markup Language
Web › HTML › Element › rtc
the html ruby text container (<rtc>) element embraces semantic annotations of characters presented in a ruby of <rb> elements used inside of <ruby> element.
... <rb> elements can have both pronunciation (<rt>) and semantic (<rtc>) annotations.
... permitted content phrasing content or <rt> elements.
...And 3 more matches
<samp>: The Sample Output element - HTML: Hypertext Markup Language
Web › HTML › Element › samp
the html sample element (<samp>) is used to enclose inline text which represents sample (or quoted) output from a computer program.
... permitted parents any element that accepts phrasing content.
... implicit aria role no corresponding role permitted aria roles any dom interface htmlelement attributes this element only includes the global attributes.
...And 3 more matches
<sub>: The Subscript element - HTML: Hypertext Markup Language
Web › HTML › Element › sub
the html subscript element (<sub>) specifies inline text which should be displayed as subscript for solely typographical reasons.
... permitted parents any element that accepts phrasing content.
... implicit aria role no corresponding role permitted aria roles any dom interface htmlelement attributes this element only includes the global attributes.
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<title>: The Document Title element - HTML: Hypertext Markup Language
Web › HTML › Element › title
the html title element (<title>) defines the document's title that is shown in a browser's title bar or a page's tab.
... it only contains text; tags within the element are ignored.
... permitted content text that is not inter-element whitespace.
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XForms Group Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Group
introduction the group element is used as a container for defining a hierarchy of form controls.
...attributes single-node binding type restrictions the group element can be bound to a node containing data of any type.
... actually, the group element doesn't interact with the data in the bound node.
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XForms Help Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Help
the message of the help element can exist in instance data, in a remote document, or as inline text.
... if more than one source of message is specified in this element, the order of precedence is: single node binding attributes, linking attributes, inline text.
... attributes single-node binding linking src - url of a document whose contents will be retrieved by the help element and used to provide a help message for the containing form control.
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XForms Hint Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Hint
the message of the hint element can exist in instance data, in a remote document, or as inline text.
... if more than one source of message is specified in this element, the order of precedence is: single node binding attributes, linking attributes, inline text.
... attributes single-node binding linking src - url of a document whose contents will be retrieved by the hint element and used to provide hint text for the containing form control.
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XForms Message Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Message
the message of the message element can exist in instance data, in a remote document, or as inline text.
... if more than one source of message is specified in this element, the order of precedence is: single node binding attributes, linking attributes, inline text.
... attributes single-node binding linking src - url of a document whose contents will be retrieved by the message element and used to provide the message text for the message element.
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XForms Submit Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Submit
upon receiving a domactivate event, this form control dispatches a xforms-submit event to the submission element (see the spec) specified in its submission attibute.
... single-node binding special submission - required reference to element submission.
... type restrictions the submit element can be bound to a node containing data of any type.
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Element - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Element
an element is a part of a webpage.
... in xml and html, an element may contain a data item or a chunk of text or an image, or perhaps nothing.
... a typical element includes an opening tag with some attributes, enclosed text content, and a closing tag.
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Empty element - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Empty element
an empty element is an element from html, svg, or mathml that cannot have any child nodes (i.e., nested elements or text nodes).
... the html, svg, and mathml specifications define very precisely what each element can contain.
... many combinations have no semantic meaning, for example an <audio> element nested inside an <hr> element.
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nsIXFormsNSInstanceElement
Mozilla › Tech › XPCOM › Reference › Interface › nsIXFormsNSInstanceElement
nsixformsnsinstanceelement is implemented by all xforms <instance/> elements, defining mozilla extensions.
... extensions/xforms/nsixformsnsinstanceelement.idlscriptable please add a summary to this article.
... last changed in gecko 1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) interface code [scriptable, uuid(80669b92-8331-4f92-aaf8-06e80e6827b3)] interface nsixformsnsinstanceelement : nsisupports { nsidomdocument getinstancedocument(); }; methods getinstancedocument nsidomdocument getinstancedocument(); getinstancedocument returns a dom document that corresponds to the instance data associated with the instance element.
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nsIXFormsNSModelElement
Mozilla › Tech › XPCOM › Reference › Interface › nsIXFormsNSModelElement
nsixformsnsmodelelement is implemented by all xforms <model/> elements.
... it defines mozilla extensions to the nsixformsmodelelement interface.
... extensions/xforms/nsixformsnsmodelelement.idlscriptable please add a summary to this article.
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CustomElementRegistry.upgrade() - Web APIs
Web › API › CustomElementRegistry › upgrade
the upgrade() method of the customelementregistry interface upgrades all shadow-containing custom elements in a node subtree, even before they are connected to the main document.
... syntax customelements.upgrade(root); parameters root a node instance with shadow-containing descendant elements that are to be upgraded.
... if there are no descendant elements that can be upgraded, no error is thrown.
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Document.rootElement - Web APIs
Web › API › Document › rootElement
document.rootelement returns the element that is the root element of the document if it is an <svg> element, otherwise null.
... it is deprecated in favor of document.documentelement, which returns the root element for all documents.
... syntax const element = document.rootelement notes if the document is a non-empty svg document, then the rootelement will be an svgsvgelement, identical to the documentelement.
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DocumentOrShadowRoot.msElementsFromRect() - Web APIs
Web › API › DocumentOrShadowRoot › msElementsFromRect
the mselementsfromrect method returns the node list of elements that are under a rectangle defined by left, top, width, and height.
... syntax object.mselementsfromrect(left, top, width, height, retval) parameters left [in] type: floating-point top[in] type: floating-point width[in] type: floating-point height [in] type: floating-point retval [out, reval] type: nodelist example to find all of the elements under a given point, use mselementsfrompoint(x, y).
... to find all of the elements which intersect a rectangle, use mselementsfromrect(top, left, width, height).
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Element.clientLeft - Web APIs
Web › API › Element › clientLeft
the width of the left border of an element in pixels.
... it includes the width of the vertical scrollbar if the text direction of the element is right–to–left and if there is an overflow causing a left vertical scrollbar to be rendered.
...if you need a fractional value, use element.getboundingclientrect().
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Element.clientTop - Web APIs
Web › API › Element › clientTop
the width of the top border of an element in pixels.
... it is a read-only, integer property of element.
... as it happens, all that lies between the two locations (offsettop and client area top) is the element's border.
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Element.getAttribute() - Web APIs
Web › API › Element › getAttribute
the getattribute() method of the element interface returns the value of a specified attribute on the element.
... syntax let attribute = element.getattribute(attributename); where attribute is a string containing the value of attributename.
... examples const div1 = document.getelementbyid('div1'); const align = div1.getattribute('align'); alert(align); // shows the value of align for the element with id="div1" description lower casing when called on an html element in a dom flagged as an html document, getattribute() lower-cases its argument before proceeding.
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Element.matches() - Web APIs
Web › API › Element › matches
the matches() method checks to see if the element would be selected by the provided selectorstring -- in other words -- checks if the element "is" the selector.
... syntax var result = element.matches(selectorstring); parameters selectorstring is a string representing the selector to test.
... example <ul id="birds"> <li>orange-winged parrot</li> <li class="endangered">philippine eagle</li> <li>great white pelican</li> </ul> <script type="text/javascript"> var birds = document.getelementsbytagname('li'); for (var i = 0; i < birds.length; i++) { if (birds[i].matches('.endangered')) { console.log('the ' + birds[i].textcontent + ' is endangered!'); } } </script> this will log "the philippine eagle is endangered!" to the console, since the element has indeed a class attribute with value endangered.
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Element.releasePointerCapture() - Web APIs
Web › API › Element › releasePointerCapture
the releasepointercapture() method of the element interface releases (stops) pointer capture that was previously set for a specific (pointerevent) pointer.
... see the element.setpointercapture() method for a description of pointer capture and how to set it for a particular element.
... syntax targetelement.releasepointercapture(pointerid); parameters pointerid the pointerid of a pointerevent object.
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Element.removeAttributeNode() - Web APIs
Web › API › Element › removeAttributeNode
the removeattributenode() method of the element object removes the specified attribute from the current element.
... syntax removedattr = element.removeattributenode(attributenode) attributenode is the attr node that needs to be removed.
... example // given: <div id="top" align="center" /> var d = document.getelementbyid("top"); var d_align = d.getattributenode("align"); d.removeattributenode(d_align); // align is now removed: <div id="top" /> notes if the removed attribute has a default value, it is immediately replaced.
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Element.setAttribute() - Web APIs
Web › API › Element › setAttribute
sets the value of an attribute on the specified element.
... syntax element.setattribute(name, value); parameters name a domstring specifying the name of the attribute whose value is to be set.
... the attribute name is automatically converted to all lower-case when setattribute() is called on an html element in an html document.
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Element.slot - Web APIs
Web › API › Element › slot
the slot property of the element interface returns the name of the shadow dom slot the element is inserted in.
... syntax var astring = element.slot element.slot = astring value a domstring.
... examples in our simple-template example (see it live), we create a trivial custom element example called <my-paragraph> in which a shadow root is attached and then populated using the contents of a template that contains a slot named my-text.
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Element.tabStop - Web APIs
Web › API › Element › tabStop
the tabstop property of the element interface returns a boolean indicating if the element can receive input focus via the tab key.
... if the specified element is a shadow host tab navigation is delegated to its children.
... this property was proposed to add tab functionality for custom elements.
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Element.toggleAttribute() - Web APIs
Web › API › Element › toggleAttribute
the toggleattribute() method of the element interface toggles a boolean attribute (removing it if it is present and adding it if it is not present) on the given element.
... syntax element.toggleattribute(name [, force]); parameters name a domstring specifying the name of the attribute to be toggled.
... the attribute name is automatically converted to all lower-case when toggleattribute() is called on an html element in an html document.
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ElementCSSInlineStyle - Web APIs
Web › API › ElementCSSInlineStyle
the elementcssinlinestyle mixin describes cssom-specific features common to the htmlelement, svgelement and mathmlelement interfaces.
... note: elementcssinlinestyle is a mixin and not an interface; you can't actually create an object of type elementcssinlinestyle.
... propertiesstylethe style property is used to get as well as set the inline style of an element.
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HTMLCanvasElement.height - Web APIs
Web › API › HTMLCanvasElement › height
the htmlcanvaselement.height property is a positive integer reflecting the height html attribute of the <canvas> element interpreted in css pixels.
... this is one of the two properties, the other being htmlcanvaselement.width, that controls the size of the canvas.
... syntax var pxl = canvas.height; canvas.height = pxl; examples given this <canvas> element: <canvas id="canvas" width="300" height="300"></canvas> you can get the height of the canvas with the following code: var canvas = document.getelementbyid('canvas'); console.log(canvas.height); // 300 specifications specification status comment html living standardthe definition of 'htmlcanvaselement.height' in that specification.
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HTMLCanvasElement.width - Web APIs
Web › API › HTMLCanvasElement › width
the htmlcanvaselement.width property is a positive integer reflecting the width html attribute of the <canvas> element interpreted in css pixels.
... this is one of the two properties, the other being htmlcanvaselement.height, that controls the size of the canvas.
... syntax var pxl = canvas.width; canvas.width = pxl; examples given this <canvas> element: <canvas id="canvas" width="300" height="300"></canvas> you can get the width of the canvas with the following code: var canvas = document.getelementbyid('canvas'); console.log(canvas.width); // 300 specifications specification status comment html living standardthe definition of 'htmlcanvaselement.width' in that specification.
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HTMLDialogElement.close() - Web APIs
Web › API › HTMLDialogElement › close
the close() method of the htmldialogelement interface closes the dialog.
... syntax dialoginstance.close(returnvalue); parameters returnvalue optional a domstring representing an updated value for the htmldialogelement.returnvalue of the dialog.
...from there you can click the cancel button to close the dialog (via the htmldialogelement.close() method), or submit the form via the submit button.
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HTMLElement: beforeinput event - Web APIs
Web › API › HTMLElement › beforeinput event
the dom beforeinput event fires when the value of an <input>, <select>, or <textarea> element is about to be modified.
... the event also applies to elements with contenteditable enabled, and to any element when designmode is turned on.
...if these properties apply to multiple elements, the editing host is the nearest ancestor element whose parent isn't editable.
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HTMLElement.isContentEditable - Web APIs
Web › API › HTMLElement › isContentEditable
the htmlelement.iscontenteditable read-only property returns a boolean that is true if the contents of the element are editable; otherwise it returns false.
... syntax editable = element.iscontenteditable example html <p id="mytext1">uneditable paragraph</p> <p id="mytext2" contenteditable="true">editable paragraph</p> <p id="infotext1">can edit the first paragraph?
...</p> javascript document.getelementbyid('infotext1').innerhtml += document.getelementbyid('mytext1').iscontenteditable; document.getelementbyid('infotext2').innerhtml += document.getelementbyid('mytext2').iscontenteditable; result specifications specification status comment html living standardthe definition of 'htmlelement.contenteditable' in that specification.
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HTMLElement.lang - Web APIs
Web › API › HTMLElement › lang
the htmlelement.lang property gets or sets the base language of an element's attribute values and text content.
...note that this attribute, though valid at the individual element level described here, is most often specified for the root element of the document.
... syntax var languageused = elementnodereference.lang; // get the value of lang elementnodereference.lang = newlanguage; // set new value for lang languageused is a string variable that gets the language in which the text of the current element is written.
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HTMLElement.offsetTop - Web APIs
Web › API › HTMLElement › offsetTop
the htmlelement.offsettop read-only property returns the distance of the current element relative to the top of the offsetparent node.
... syntax toppos = element.offsettop; parameters toppos is the number of pixels from the top of the closest relatively positioned parent element.
... example var d = document.getelementbyid("div1"); var toppos = d.offsettop; if (toppos > 10) { // object is offset more // than 10 pixels from its parent } specification specification status comment css object model (cssom) view modulethe definition of 'offsettop' in that specification.
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HTMLFormElement.requestSubmit() - Web APIs
Web › API › HTMLFormElement › requestSubmit
the htmlformelement method requestsubmit() requests that the form be submitted using a specific submit button.
... syntax htmlformelement.requestsubmit(submitter); parameters submitter optional the submit button whose attributes describe the method by which the form is to be submitted.
... this may be either an <input> or <button> element whose type attribute is submit.
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HTMLImageElement.align - Web APIs
Web › API › HTMLImageElement › align
the obsolete align property of the htmlimageelement interface is a string which indicates how to position the image relative to its container.
... syntax htmlimageelement.align = alignmode; alignmode = htmlimageelement.align; value a domstring specifying one of the following strings which set the alignment mode for the image.
... baseline alignment these three values specify the alignment of the element relative to the text baseline.
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HTMLImageElement.isMap - Web APIs
Web › API › HTMLImageElement › isMap
the htmlimageelement proeprty ismap is a boolean value which indicates that the image is to be used by a server-side image map.
... this may only be used on images located within an <a> element.
... syntax htmlimageelement.ismap = true|false; let ismap = htmlimageelement.ismap; value a boolean value which is true if the image is being used for a server-side image map; otherwise, the value is false.
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HTMLImageElement.name - Web APIs
Web › API › HTMLImageElement › name
the htmlimageelement interface's deprecated name property specifies a name for the element.
... this has been replaced by the id property available on all elements.
... syntax htmlimageelement.name = namestring; namestring = htmlimageelement.name; value a domstring providing a name by which the image can be referenced.
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HTMLImageElement.srcset - Web APIs
Web › API › HTMLImageElement › srcset
the htmlimageelement property srcset is a string which identifies one or more image candidate strings, separated using commas (,) each specifying image resources to use under given circumstances.
... syntax htmlimageelement.srcset = imagecandidatestrings; let srcset = htmlimageelement.srcset; value a usvstring containing a comma-separated list of one or more image candidate strings to be used when determining which image resource to present inside the <img> element represented by the htmlimageelement.
... for more information on what image formats are available for use in the <img> element, see image file type and format guide.
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HTMLImageElement.useMap - Web APIs
Web › API › HTMLImageElement › useMap
the usemap property on the htmlimageelement interface reflects the value of the html usemap attribute, which is a string providing the name of the client-side image map to apply to the image.
... syntax htmlimageelement.usemap = imagemapanchor; let imagemapanchor = htmlimageelement.usemap; value a usvstring providing the page-local url (that is, a url that begins with the hash or pound symbol, "#") of the <map> element which defines the image map to apply to the image.
... usage notes the string value of usemap must be a valid anchor for a <map> element.
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HTMLInputElement.stepDown() - Web APIs
Web › API › HTMLInputElement › stepDown
the htmlinputelement.stepdown([n]) method decrements the value of a numeric type of <input> element by the value of the step attribute or up to n multiples of the step attribute if a number is passed as the parameter.
... htmlinputelement.stepdown() decrements the value by (step * n), where n defaults to 1 if not specified.
... throws an invalid_state_err exception: if the method is not applicable to for the current type value, if the element has no step value, if the value cannot be converted to a number, if the resulting value is above the max or below the min.
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HTMLInputElement.webkitEntries - Web APIs
Web › API › HTMLInputElement › webkitEntries
the read-only webkitentries property of the htmlinputelement interface contains an array of file system entries (as objects based on filesystementry) representing files and/or directories selected by the user using an <input> element of type file, but only if that selection was made using drag-and-drop: selecting a file in the dialog will leave the property empty (bug 1326031).
...this means the <input> element was configured to let the user choose directories.
... syntax var entries = htmlinputelement.webkitentries; value an array of objects based on filesystementry, each representing one file which is selected in the <input> element.
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HTMLMediaElement.captureStream() - Web APIs
Web › API › HTMLMediaElement › captureStream
the capturestream() property of the htmlmediaelement interface returns a mediastream object which is streaming a real-time capture of the content being rendered in the media element.
... syntax var mediastream = mediaelement.capturestream() parameters none.
... example in this example, an event handler is established so that clicking a button starts capturing the contents of a media element with the id "playback" into a mediastream.
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HTMLMediaElement.currentTime - Web APIs
Web › API › HTMLMediaElement › currentTime
the htmlmediaelement interface's currenttime property specifies the current playback time in seconds.
... syntax var currenttime = htmlmediaelement.currenttime; htmlmediaelement.currenttime = 35; value a double-precision floating-point value indicating the current playback time in seconds.
... example var video = document.createelement('video'); console.log(video.currenttime); usage notes reduced time precision to offer protection against timing attacks and fingerprinting, browsers may round or otherwise adjust the value returned by currenttime.
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HTMLMediaElement.duration - Web APIs
Web › API › HTMLMediaElement › duration
the read-only htmlmediaelement property duration indicates the length of the element's media in seconds.
... syntax myduration = htmlmediaelement.duration value a double-precision floating-point value indicating the duration of the media in seconds.
...if the element's media doesn't have a known duration—such as for live media streams—the value of duration is +infinity.
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HTMLMediaElement.fastSeek() - Web APIs
Web › API › HTMLMediaElement › fastSeek
the htmlmediaelement.fastseek() method quickly seeks the media to the new time with precision tradeoff.
... note: if you need to seek with precision, you should set htmlmediaelement.currenttime instead.
... syntax htmlmediaelement.fastseek(time); parameters time a double.
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HTMLMediaElement.seekable - Web APIs
Web › API › HTMLMediaElement › seekable
the seekable read-only property of the htmlmediaelement returns a timeranges object that contains the time ranges that the user is able to seek to, if any.
....queryselector("video"); var timerangesobject = video.seekable; var timeranges = []; //go through the object and output an array for (let count = 0; count < timerangesobject.length; count ++) { timeranges.push([timerangesobject.start(count), timerangesobject.end(count)]); } specifications specification status comment html living standardthe definition of 'htmlmediaelement' in that specification.
... living standard no change from html5 html5the definition of 'htmlmediaelement' in that specification.
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HTMLMediaElement.src - Web APIs
Web › API › HTMLMediaElement › src
the htmlmediaelement.src property reflects the value of the html media element's src attribute, which indicates the url of a media resource to use in the element.
... note: the best way to know the url of the media resource currently in active use in this element is to look at the value of the currentsrc attribute, which also takes into account selection of a best or preferred media resource from a list provided in an htmlsourceelement (which represents a <source> element).
... syntax var mediaurl = htmlmediaelement.src; value a usvstring object containing the url of a media resource to use in the element; this property reflects the value of the html element's src attribute.
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HTMLMediaElement.videoTracks - Web APIs
Web › API › HTMLMediaElement › videoTracks
the read-only videotracks property on htmlmediaelement objects returns a videotracklist object listing all of the videotrack objects representing the media element's video tracks.
... the returned list is live; that is, as tracks are added to and removed from the media element, the list's contents change dynamically.
...see event handlers in videotracklist to learn more about watching for changes to a media element's track list.
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HTMLObjectElement.setCustomValidity - Web APIs
Web › API › HTMLObjectElement › setCustomValidity
the setcustomvalidity() method of the htmlobjectelement interface sets a custom validity message for the element.
... syntax htmlobjectelement.setcustomvalidity(message); parameters error the message to use for validity errors.
... examples in this example, we pass the id of an input element, and set different error messages depending on whether the value is missing, too low or too high.
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HTMLOrForeignElement - Web APIs
Web › API › HTMLOrForeignElement
the htmlorforeignelement mixin describes several features common to the htmlelement, svgelement and mathmlelement interfaces.
... note: htmlorforeignelement is a mixin and not an interface; you can't actually create an object of type htmlorforeignelement.
... propertiesdataset read only the dataset read-only property of the htmlorforeignelement interface provides read/write access to all the custom data attributes (data-*) set on the element.nonce the nonce property of the htmlorforeignelement interface returns the cryptographic number used once that is used by content security policy to determine whether a given fetch will be allowed to proceed.tabindexthe tabindex property of the htmlorforeignelement interface represents the tab order of the current element.methodsblur()the htmlelement.blur() method removes keyboard focus from the current element.focus()the htmlelement.focus() method sets focus on the specified element, if it can be focused.
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HTMLSelectElement.autofocus - Web APIs
Web › API › HTMLSelectElement › autofocus
the htmlselectelement.autofocus property is a boolean that reflects the autofocus html attribute, which indicates whether the associated <select> element will get input focus when the page loads, unless the user overrides it.
... only one form-associated element in a document can have this attribute specified.
... if there are several, the first element with the attribute set inserted, usually the first such element on the page, get the initial focus.
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HTMLSelectElement.disabled - Web APIs
Web › API › HTMLSelectElement › disabled
the htmlselectelement.disabled is a boolean that reflects the disabled html attribute, which indicates whether the control is disabled.
...a disabled element is unusable and un-clickable.
... syntax edit aselectelement.disabled = abool; example html <label> allow drinks?
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HTMLSelectElement.form - Web APIs
Web › API › HTMLSelectElement › form
the htmlselectelement.form read-only property returns a htmlformelement representing the form that this element is associated with.
... if the element is not associated with of a <form> element, then it returns null.
... syntax edit aform = aselectelement.form.selectname; example html <form action="http://www.google.com/search" method="get"> <label>google: <input type="search" name="q"></label> <input type="submit" value="search..."> </form> javascript a property available on all form elements, "type" returns the type of the calling form element.
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HTMLSelectElement.type - Web APIs
Web › API › HTMLSelectElement › type
the htmlselectelement.type read-only property returns the form control's type.
... example switch (select.type) { case 'select-multiple': // multiple values may be selected break; case 'select-one': // only one value may be selected break; default: // non-standard value (or this isn't a select element) } specifications specification status comment html living standardthe definition of 'htmlselectelement' in that specification.
... html5the definition of 'htmlselectelement' in that specification.
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HTMLSlotElement.assignedNodes() - Web APIs
Web › API › HTMLSlotElement › assignedNodes
the assignednodes() property of the htmlslotelement interface returns a sequence of the nodes assigned to this slot, and if the flatten option is set to true, the assigned nodes of any other slots that are descendants of this slot.
... syntax var assignednodes = htmlslotelement.assignednodes(options) parameters options optional an object that sets options for the nodes to be returned.
... the available options are: flatten: a boolean indicating whether to return the assigned nodes of any available child <slot> elements (true) or not (false).
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HTMLTableElement.createCaption() - Web APIs
Web › API › HTMLTableElement › createCaption
the htmltableelement.createcaption() method returns the <caption> element associated with a given <table>.
... if no <caption> element exists on the table, this method creates it, and then returns it.
...the caption does not need to be added separately as would be the case if document.createelement() had been used to create the new <caption> element.
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HTMLTrackElement: cuechange event - Web APIs
Web › API › HTMLTrackElement › cuechange event
the event is fired at both the texttrack and at the htmltrackelement in which it's being presented, if any.
... the texttrack you can set up a listener for the cuechange event on a texttrack using the addeventlistener() method: track.addeventlistener('cuechange', function () { let cues = track.activecues; // array of current cues }); or you can just set the oncuechange event handler property: track.oncuechange = function () { let cues = track.activecues; // array of current cues } on the track element the underlying texttrack, indicated by the track property, receives a cuechange event every time the currently-presented cue is changed.
... this happens even if the track isn't associated with a media element.
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HTMLVideoElement.msIsLayoutOptimalForPlayback - Web APIs
Web › API › HTMLVideoElement › msIsLayoutOptimalForPlayback
syntax htmlvideoelement.msislayoutoptimalforplayback: domstring; value boolean value set to true indicates that video is being rendered optimally (better performance and using less battery power).
... for msislayoutoptimalforplayback to be true, avoid the following: video elements with cascading style sheets (css) outlines set.
... rendering a video element through a canvas element.
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MediaElementAudioSourceNode() - Web APIs
Web › API › MediaElementAudioSourceNode › MediaElementAudioSourceNode
the mediaelementaudiosourcenode() constructor creates a new mediaelementaudiosourcenode object instance.
... syntax var myaudiosource = new mediaelementaudiosourcenode(context, options); parameters inherits parameters from the audionodeoptions dictionary.
... options a mediaelementaudiosourceoptions dictionary object defining the properties you want the mediaelementaudiosourcenode to have: mediaelement: an htmlmediaelement that will be used as the source for the audio.
...And 2 more matches
SVGAltGlyphDefElement - Web APIs
Web › API › SVGAltGlyphDefElement
the svgaltglyphdefelement interface corresponds to the <altglyphdef> element.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 11.666666666666666%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 70" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgaltglyphdefelement" target="_top"><rect x="1" y="1" width="210" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="106" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgaltglyphdefelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} warning: this interface was removed in the svg 2 specification.
... properties this interface doesn't implement any specific properties, but inherits properties from its parent interface, svgelement.
...And 2 more matches
SVGAltGlyphItemElement - Web APIs
Web › API › SVGAltGlyphItemElement
the svgaltglyphitemelement interface corresponds to the <altglyphitem> element.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 11.666666666666666%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 70" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgaltglyphitemelement" target="_top"><rect x="1" y="1" width="220" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="111" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgaltglyphitemelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} warning: this interface was removed in the svg 2 specification.
... properties this interface doesn't implement any specific properties, but inherits properties from its parent interface, svgelement.
...And 2 more matches
SVGAnimateColorElement - Web APIs
Web › API › SVGAnimateColorElement
the svganimatecolorelement interface corresponds to the <animatecolor> element.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svganimatecolorelement" target="_top"><rect x="1" y="1" width="220" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="111" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svganimatecolorelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface has no properties but inherits properties from...
... its parent, svganimationelement.
...And 2 more matches
targetElement - Web APIs
Web › API › SVGAnimationElement › targetElement
the svganimationelement.targetelement property refers to the element which is being animated.
... if no target element is being animated (for example, because the href attribute specifies an unknown element), the value returned is null.
... syntax var targetelement = someelement.targetelement; specifications specification status comment svg animations level 2the definition of 'svganimationelement.targetelement' in that specification.
...And 2 more matches
SVGFontElement - Web APIs
Web › API › SVGFontElement
the svgfontelement interface corresponds to the <font> elements.
... object-oriented access to the attributes of the <font> element via the svg dom is not possible.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgfontelement" target="_top"><rect x="1" y="1" width="140" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="71" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgfontelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface has no properties but inherits properties from its parent, svge...
...And 2 more matches
SVGGeometryElement.getPointAtLength() - Web APIs
Web › API › SVGGeometryElement › getPointAtLength
the svggeometryelement.getpointatlength() method returns the point at a given distance along the path.
... note: this method was originally part of the svgpathelement interface.
... svg 2 introduced the svggeometryelement interface and moved the property to it.
...And 2 more matches
SVGGeometryElement.getTotalLength() - Web APIs
Web › API › SVGGeometryElement › getTotalLength
the svggeometryelement.gettotallength() method returns the user agent's computed value for the total length of the path in user units.
... note: this method was originally part of the svgpathelement interface.
... svg 2 introduced the svggeometryelement interface and moved the property to it.
...And 2 more matches
SVGGeometryElement.isPointInFill() - Web APIs
Web › API › SVGGeometryElement › isPointInFill
the svggeometryelement.ispointinfill() method determines whether a given point is within the fill shape of an element.
... normal hit testing rules apply; the value of the pointer-events property on the element determines whether a point is considered to be within the fill.
... the point argument is interpreted as a point in the local coordiante system of the element.
...And 2 more matches
::-webkit-progress-inner-element - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-progress-inner-element
the ::-webkit-progress-inner-element css pseudo-element represents the outermost container of the <progress> element.
... it is the parent of the ::-webkit-progress-bar pseudo-element.
... note: in order to let ::-webkit-progress-value take effect, -webkit-appearance needs to be set to none on the <progress> element.
...And 2 more matches
<aside>: The Aside element - HTML: Hypertext Markup Language
Web › HTML › Element › aside
the html <aside> element represents a portion of a document whose content is only indirectly related to the document's main content.
... permitted parents any element that accepts flow content.
... note that an <aside> element must not be a descendant of an <address> element.
...And 2 more matches
<blink>: The Blinking Text element (obsolete) - HTML: Hypertext Markup Language
Web › HTML › Element › blink
the html blink element (<blink>) is a non-standard element which causes the enclosed text to flash slowly.
... do not use this element as it is obsolete and is bad design practice.
... blinking text is frowned upon by several accessibility standards and the css specification allows browsers to ignore the <blink> element.
...And 2 more matches
<center>: The Centered Text element (obsolete) - HTML: Hypertext Markup Language
Web › HTML › Element › center
the obsolete html center element (<center>) is a block-level element that displays its block-level or inline contents centered horizontally within its containing element.
... this tag has been deprecated in html 4 (and xhtml 1) in favor of the css text-align property, which can be applied to the <div> element or to an individual <p>.
... dom interface this element implements the htmlelement interface.
...And 2 more matches
<pre>: The Preformatted Text element - HTML: Hypertext Markup Language
Web › HTML › Element › pre
the html <pre> element represents preformatted text which is to be presented exactly as written in the html file.
...whitespace inside this element is displayed as written.
... permitted parents any element that accepts flow content.
...And 2 more matches
<q>: The Inline Quotation element - HTML: Hypertext Markup Language
Web › HTML › Element › q
the html <q> element indicates that the enclosed text is a short inline quotation.
...this element is intended for short quotations that don't require paragraph breaks; for long quotations use the <blockquote> element.
... permitted parents any element that accepts phrasing content.
...And 2 more matches
<shadow>: The obsolete Shadow Root element - HTML: Hypertext Markup Language
Web › HTML › Element › shadow
the html <shadow> element—an obsolete part of the web components technology suite—was intended to be used as a shadow dom insertion point.
... permitted parents any element that accepts flow content.
... permitted aria roles none dom interface htmlshadowelement attributes this element includes the global attributes.
...And 2 more matches
<var>: The Variable element - HTML: Hypertext Markup Language
Web › HTML › Element › var
the html variable element (<var>) represents the name of a variable in a mathematical expression or a programming context.
... permitted parents any element that accepts phrasing content.
... implicit aria role no corresponding role permitted aria roles any dom interface htmlelement attributes this element only includes the global attributes.
...And 2 more matches
MathML element reference - MathML
Web › MathML › Element
this is an alphabetical list of mathml presentation elements.
... mathml elements implement the mathmlelement class.
... mathml presentation elements a to z math <math> (top-level element) a <maction> (binded actions to sub-expressions) <maligngroup> (alignment group) <malignmark> (alignment points) e <menclose> (enclosed contents) <merror> (enclosed syntax error messages) f <mfenced> (parentheses) <mfrac> (fraction) g <mglyph> (displaying non-standard symbols) i <mi> (identifier) l <mlabeledtr> (labeled row in a table or a matrix) <mlongdiv> (long division notation) m <mmultiscripts> (prescripts and tensor indices) n <mn> (number) o <mo> (operator) <mover> (overscript) p <mpadded> (space around content) <mphantom> (invisible content with reserved space) r <mroot> (radical with specified index) <mrow> (grouped sub-expressions) s <ms> (str...
...And 2 more matches
<title> — the SVG accessible name element - SVG: Scalable Vector Graphics
Web › SVG › Element › title
the <title> element provides an accessible, short-text description of any svg container element or graphics element.
... text in a <title> element is not rendered as part of the graphic, but browsers usually display it as a tooltip.
... if an element can be described by visible text, it is recommended to reference that text with an aria-labelledby attribute rather than using the <title> element.
...And 2 more matches
element-available - XPath
Web › XPath › Functions › element-available
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the element-available function determines if an element is available and returns true or false.
... syntax element-available(qname ) arguments qname must evaluate to a valid qname.
...if the expanded-name has a namespace uri equal to the xslt namespace uri, then it refers to an element defined by xslt.
...And 2 more matches
<xsl:element> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › element
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:element> element creates an element in the output document.
... syntax <xsl:element name=name namespace=uri use-attribute-sets=list-of-names > template </xsl:element> required attributes name specifies the desired name of the output element.
... optional attributes namespace specifies the namespace of the output element.
...And 2 more matches
getElementsByAttributeNS - Archive of obsolete content
Archive › Mozilla › XUL › Method › getElementsByAttributeNS
« xul reference home getelementsbyattributens(ns, attrib, value ) return type: dom nodelist returns an array of all the child elements of the element that have the attribute namespace given by the first argument, the attribute name given by the second argument, and the value given by the third argument.
... if the namespace (first argument) is set to '*', elements with any attribute namespace will be retrieved.
... if the third argument is '*', the elements retrieved may have the attribute (second argument) set to any value.
... note that this method is only available on xul elements and is not part of the dom.
XForms Range Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Range
single-node binding special incremental - supported, default value is false start - lower bound of possible values end - upper bound of possible values step - is used for incrementing/decrementing values start/end/step attributes if the value of the bound instance node is outside the range of values specified by the start and end attributes, then the range element receives a xforms-out-of-range event.
... if the bound value then becomes in range, the range element receives a xforms-in-range event.
... type restrictions the range element can be bound to a node of type xsd:duration, xsd:date, xsd:time, xsd:datetime, xsd:gyearmonth, xsd:gyear, xsd:gmonthday, xsd:gday, xsd:gmonth, xsd:float, xsd:decimal or xsd:double or any type derived from one of these.
... representations the xforms range element is represented by a slider widget (xhtml only).
Script-supporting element - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Script-supporting element
in an html document, script-supporting elements are those elements that don't directly contribute to the appearance or layout of the page; instead, they're either scripts or contain information that's only used by scripts.
... these elements may be important, but do not affect the displayed page unless the page's scripts explicitly cause them to do so.
... there are only two script-supporting elements: <script> and <template>.
... technical reference to learn more, see script-supporting elements in kinds of html content.
Reposition elements in the page - Firefox Developer Tools
Tools › Page Inspector › How to › Reposition elements in the page
new in firefox 48 starting in firefox 48 you can move absolutely positioned elements by dragging them around the page.
... if an element has its position property set to absolute, relative or fixed and one or more of the top, bottom , left or right properties, the box model view displays a button: if you click that button, two handles appear next to the element: you can use these handles to drag the element around the page.
... if the element is absolutely positioned, dashed lines are shown representing the offset parent.
... for relatively positioned elements the dashed lines indicate the original position of the node.
CustomElementRegistry.get() - Web APIs
Web › API › CustomElementRegistry › get
the get() method of the customelementregistry interface returns the constructor for a previously-defined custom element.
... syntax constructor = customelements.get(name); parameters name the name of the custom element whose constructor you want to return a reference to.
... return value the constructor for the named custom element, or undefined if there is no custom element definition with that name.
... examples customelements.define('my-paragraph', class extends htmlelement { constructor() { super(); let template = document.getelementbyid('my-paragraph'); let templatecontent = template.content; const shadowroot = this.attachshadow({mode: 'open'}) .appendchild(templatecontent.clonenode(true)); } }) // return a reference to the my-paragraph constructor let ctor = customelements.get('my-paragraph'); specifications specification status comment html living standardthe definition of 'customelements.get()' in that specification.
DataTransfer.addElement() - Web APIs
Web › API › DataTransfer › addElement
the datatransfer.addelement() method sets the drag source to the given element.
... this element will be the element to which drag and dragend events are fired, and not the defaut target (the node that was dragged).
... syntax void datatransfer.addelement(el); arguments el the element to set as the drag source.
... return value void example this example shows the use of the addelement() method function change_drag_node(event, node) { var dt = event.datatransfer; dt.addelement(node); } specifications this method is not defined in any web standard.
Document.documentElement - Web APIs
Web › API › Document › documentElement
document.documentelement returns the element that is the root element of the document (for example, the <html> element for html documents).
... syntax const element = document.documentelement example const rootelement = document.documentelement; const firsttier = rootelement.childnodes; // firsttier is a nodelist of the direct children of the root element // such as <head> and <body> for (const child of firsttier) { // do something with each direct child of the root element } notes for any non-empty html document, documentelement will always be an <html> element.
... for any non-empty xml document, documentelement will always be whatever element is the root element of the document.
... specifications specification status comment domthe definition of 'document.documentelement' in that specification.
Document.scrollingElement - Web APIs
Web › API › Document › scrollingElement
the scrollingelement read-only property of the document interface returns a reference to the element that scrolls the document.
... in standards mode, this is the root element of the document, document.documentelement.
... when in quirks mode, the scrollingelement attribute returns the html body element if it exists and is not potentially scrollable, otherwise it returns null.
... syntax var element = document.scrollingelement; example var scrollelm = document.scrollingelement; scrollelm.scrolltop = 0; specifications specification status comment css object model (cssom) view modulethe definition of 'scrollingelement' in that specification.
DocumentOrShadowRoot.fullscreenElement - Web APIs
Web › API › DocumentOrShadowRoot › fullscreenElement
the documentorshadowroot.fullscreenelement read-only property returns the element that is currently being presented in full-screen mode in this document, or null if full-screen mode is not currently in use.
... syntax var element = document.fullscreenelement; return value the element object that's currently in full-screen mode; if full-screen mode isn't currently in use by the document>, the returned value is null.
... example this example presents a function, isvideoinfullscreen(), which looks at the value returned by fullscreenelement; if the document is in full-screen mode (fullscreenelement isn't null) and the full-screen element's nodename is video, indicating a <video> element, the function returns true, indicating that the video is in full-screen mode.
... function isvideoinfullscreen() { if (document.fullscreenelement && document.fullscreenelement.nodename == 'video') { return true; } return false; } specifications specification status comment fullscreen apithe definition of 'document.fullscreenelement' in that specification.
Element.clientHeight - Web APIs
Web › API › Element › clientHeight
the element.clientheight read-only property is zero for elements with no css or inline layout boxes; otherwise, it's the inner height of an element in pixels.
... when clientheight is used on the root element (the <html> element), (or on <body> if the document is in quirks mode), the viewport's height (excluding any scrollbar) is returned.
...if you need a fractional value, use element.getboundingclientrect().
... syntax var intelemclientheight = element.clientheight; intelemclientheight is an integer corresponding to the clientheight of element in pixels.
Element.clientWidth - Web APIs
Web › API › Element › clientWidth
the element.clientwidth property is zero for inline elements and elements with no css; otherwise, it's the inner width of an element in pixels.
... when clientwidth is used on the root element (the <html> element), (or on <body> if the document is in quirks mode), the viewport's width (excluding any scrollbar) is returned.
...if you need a fractional value, use element.getboundingclientrect().
... syntax var intelemclientwidth = element.clientwidth; intelemclientwidth is an integer corresponding to the clientwidth of element in pixels.
Element.computedStyleMap() - Web APIs
Web › API › Element › computedStyleMap
the computedstylemap() method of the element interface returns a stylepropertymapreadonly interface which provides a read-only representation of a css declaration block that is an alternative to cssstyledeclaration.
... syntax var stylepropertymapreadonly = element.computedstylemap() parameters none.
... // get the element const myelement = document.queryselector('a'); // get the <dl> we'll be populating const styleslist = document.queryselector('#regurgitation'); // retrieve all computed styles with computedstylemap() const allcomputedstyles = myelement.computedstylemap(); // iterate thru the map of all the properties and values, adding a <dt> and <dd> for each for (const [prop, val] of allcomputedstyles) { //...
... properties const cssproperty = document.createelement('dt'); cssproperty.appendchild(document.createtextnode(prop)); styleslist.appendchild(cssproperty); // values const cssvalue = document.createelement('dd'); cssvalue.appendchild(document.createtextnode(val)); styleslist.appendchild(cssvalue); } in browsers that support computedstylemap(), you'll see a list of all the css properties and values.
Element.createShadowRoot() - Web APIs
Web › API › Element › createShadowRoot
use element.createshadowroot to create an instance of shadow dom.
... when shadow dom is created, it is always attached to an existing element.
... after the shadow dom is created, the element that it is attached to is called the shadow root.
... syntax var shadowroot = element.createshadowroot(); parameters no parameters.
Element.getAttributeNames() - Web APIs
Web › API › Element › getAttributeNames
the getattributenames() method of the element interface returns the attribute names of the element as an array of strings.
... if the element has no attributes it returns an empty array.
... using getattributenames() along with getattribute(), is a memory-efficient and performant alternative to accessing element.attributes.
... syntax let attributenames = element.getattributenames(); example // iterate over element's attributes for (let name of element.getattributenames()) { let value = element.getattribute(name); console.log(name, value); } polyfill if (element.prototype.getattributenames == undefined) { element.prototype.getattributenames = function () { var attributes = this.attributes; var length = attributes.length; var result = new array(length); for (var i = 0; i < length; i++) { result[i] = attributes[i].name; } return result; }; } specifications specification status comment domthe definition of 'element.getattributenames' in that specification.
Element.hasAttributes() - Web APIs
Web › API › Element › hasAttributes
the hasattributes() method of the element interface returns a boolean indicating whether the current element has any attributes or not.
... syntax var result = element.hasattributes(); return value result holds the return value true or false.
... examples let foo = document.getelementbyid('foo'); if (foo.hasattributes()) { // do something with 'foo.attributes' } polyfill ;(function(prototype) { prototype.hasattributes = prototype.hasattributes || function() { return (this.attributes.length > 0); } })(element.prototype); specifications specification status comment domthe definition of 'element.hasattributes()' in that specification.
... living standard moved from the node interface to the more specialized element interface.
Element.id - Web APIs
Web › API › Element › id
the id property of the element interface represents the element's identifier, reflecting the id global attribute.
... the id is often used with getelementbyid() to retrieve a particular element.
... another common case is to use an element's id as a selector when styling the document with css.
... syntax var idstr = element.id; // get the id element.id = idstr; // set the id idstr is the identifier of the element.
Element: mouseout event - Web APIs
Web › API › Element › mouseout event
the mouseout event is fired at an element when a pointing device (usually a mouse) is used to move the cursor so that it is no longer contained within the element or one of its children.
... mouseout is also delivered to an element if the cursor enters a child element, because the child element obscures the visible area of the element.
...mouseout is added to the list to color the targeted element orange when the mouse exits it.
... html <ul id="test"> <li>item 1</li> <li>item 2</li> <li>item 3</li> </ul> javascript let test = document.getelementbyid("test"); // briefly make the list purple when the mouse moves off the // <ul> element test.addeventlistener("mouseleave", function( event ) { // highlight the mouseleave target event.target.style.color = "purple"; // reset the color after a short delay settimeout(function() { event.target.style.color = ""; }, 1000); }, false); // briefly make an <li> orange when the mouse moves off of it test.addeventlistener("mouseout", ...
Element.onfullscreenchange - Web APIs
Web › API › Element › onfullscreenchange
the element interface's onfullscreenchange property is an event handler for the fullscreenchange event that is fired when the element has transitioned into or out of full-screen mode.
... syntax targetdocument.onfullscreenchange = fullscreenchangehandler; value an event handler for the fullscreenchange event, indicating that the element has changed in or out of full-screen mode.
...this function determines which element it was called on by checking the value of event.target, then compares the document's fullscreenelement value to the element to see if they're the same node.
... function togglefullscreen() { let elem = document.queryselector("video"); elem.onfullscreenchange = handlefullscreenchange; if (!document.fullscreenelement) { elem.requestfullscreen().then({}).catch(err => { alert(`error attempting to enable full-screen mode: ${err.message} (${err.name})`); }); } else { document.exitfullscreen(); } } function handlefullscreenchange(event) { let elem = event.target; let isfullscreen = document.fullscreenelement === elem; adjustmycontrols(isfullscreen); } specifications specif...
Element.openOrClosedShadowRoot - Web APIs
Web › API › Element › openOrClosedShadowRoot
the element.openorcloseshadowroot read-only property represents the shadow root hosted by the element, regardless if its mode is open or closed.
... use element.attachshadow() to add a shadow root to an existing element.
... syntax var shadowroot = element.shadowroot; value a shadowroot object instance, regardless if its mode is set to open or closed, or null if no shadow root is present.
... (see element.attachshadow() for further details).
Element.part - Web APIs
Web › API › Element › part
the part property of the element interface represents the part identifier(s) of the element (i.e.
...these can be used to style parts of a shadow dom, via the ::part pseudo-element.
... syntax let elementpartlist = element.part examples the following excerpt is from our shadow-part example.
...t.children; for(let elem of children) { if(elem.getattribute('part')) { tabs.push(elem); } } tabs.foreach((tab) => { tab.addeventlistener('click', (e) => { tabs.foreach((tab) => { tab.part = 'tab'; }) e.target.part = 'tab active'; }) console.log(tab.part); }) specifications specification status comment shadow partsthe definition of 'element.part' in that specification.
Element.removeAttribute() - Web APIs
Web › API › Element › removeAttribute
the element method removeattribute() removes the attribute with the specified name from the element.
... syntax element.removeattribute(attrname); parameters attrname a domstring specifying the name of the attribute to remove from the element.
... dom methods dealing with element's attributes: not namespace-aware, most commonly used methods namespace-aware variants (dom level 2) dom level 1 methods for dealing with attr nodes directly (seldom used) dom level 2 namespace-aware methods for dealing with attr nodes directly (seldom used) setattribute (dom 1) setattributens setattributenode setattributenodens getattribute (dom 1) getattributens getattributenode getattributenodens hasattribute (dom 2) hasattri...
...butens - - removeattribute (dom 1) removeattributens removeattributenode - example // given: <div id="div1" align="left" width="200px"> document.getelementbyid("div1").removeattribute("align"); // now: <div id="div1" width="200px"> specifications specification status comment domthe definition of 'element" removeattribute' in that specification.
Element.removeAttributeNS() - Web APIs
Web › API › Element › removeAttributeNS
the removeattributens() method of the element interface removes the specified attribute from an element.
... syntax element.removeattributens(namespace, attrname); parameters namespace is a string that contains the namespace of the attribute.
... example // given: // <div id="div1" xmlns:special="http://www.mozilla.org/ns/specialspace" // special:specialalign="utterleft" width="200px" /> d = document.getelementbyid("div1"); d.removeattributens("http://www.mozilla.org/ns/specialspace", "specialalign"); // now: <div id="div1" width="200px" /> notes dom methods dealing with element's attributes: not namespace-aware, most commonly used methods namespace-aware variants (dom level 2) dom level 1 methods for dealing with attr nodes directly (seldom used) dom level 2 namespace-aware methods for dealing with attr nodes directly (seldom used) setattribute (dom 1) setattributens setattributenode setattributenodens getattribute (dom 1) getattribu...
...tens getattributenode getattributenodens hasattribute (dom 2) hasattributens - - removeattribute (dom 1) removeattributens removeattributenode - specifications specification status comment domthe definition of 'element: removeattributens' in that specification.
Element.scroll() - Web APIs
Web › API › Element › scroll
the scroll() method of the element interface scrolls the element to a particular set of coordinates inside a given element.
... syntax element.scroll(x-coord, y-coord) element.scroll(options) parameters calling with coordinates x-coord the pixel along the horizontal axis of the element that you want displayed in the upper left.
... y-coord the pixel along the vertical axis of the element that you want displayed in the upper left.
... examples // put the 1000th vertical pixel at the top of the element element.scroll(0, 1000); using options: element.scroll({ top: 100, left: 100, behavior: 'smooth' }); specification specification status comment css object model (cssom) view modulethe definition of 'element.scroll()' in that specification.
Element.scrollIntoView() - Web APIs
Web › API › Element › scrollIntoView
the element interface's scrollintoview() method scrolls the element's parent container such that the element on which scrollintoview() is called is visible to the user syntax element.scrollintoview(); element.scrollintoview(aligntotop); // boolean parameter element.scrollintoview(scrollintoviewoptions); // object parameter parameters aligntotop optional is a boolean value: if true, the top of the element will be aligned to the top of the visible area of the scrollable ancestor.
... if false, the bottom of the element will be aligned to the bottom of the visible area of the scrollable ancestor.
... example var element = document.getelementbyid("box"); element.scrollintoview(); element.scrollintoview(false); element.scrollintoview({block: "end"}); element.scrollintoview({behavior: "smooth", block: "end", inline: "nearest"}); notes the element may not be scrolled completely to the top or bottom depending on the layout of other elements.
... specifications specification status comment css object model (cssom) view modulethe definition of 'element.scrollintoview()' in that specification.
Element.scrollTo() - Web APIs
Web › API › Element › scrollTo
the scrollto() method of the element interface scrolls to a particular set of coordinates inside a given element.
... syntax element.scrollto(x-coord, y-coord) element.scrollto(options) parameters x-coord is the pixel along the horizontal axis of the element that you want displayed in the upper left.
... y-coord is the pixel along the vertical axis of the element that you want displayed in the upper left.
... examples element.scrollto(0, 1000); using options: element.scrollto({ top: 100, left: 100, behavior: 'smooth' }); specifications specification status comment css object model (cssom) view modulethe definition of 'element.scrollto()' in that specification.
Element.setAttributeNodeNS() - Web APIs
Web › API › Element › setAttributeNodeNS
setattributenodens adds a new namespaced attribute node to an element.
... syntax replacedattr = element.setattributenodens(attributenode) replacedattr is the replaced attribute node, if any, returned by this function.
... example // <div id="one" xmlns:myns="http://www.mozilla.org/ns/specialspace" // myns:special-align="utterleft">one</div> // <div id="two">two</div> var myns = "http://www.mozilla.org/ns/specialspace"; var d1 = document.getelementbyid("one"); var d2 = document.getelementbyid("two"); var a = d1.getattributenodens(myns, "special-align"); d2.setattributenodens(a.clonenode(true)); alert(d2.attributes[1].value) // returns: `utterleft' notes if the specified attribute already exists on the element, then that attribute is replaced with the new one and the replaced one is returned.
... dom methods dealing with element's attributes: not namespace-aware, most commonly used methods namespace-aware variants (dom level 2) dom level 1 methods for dealing with attr nodes directly (seldom used) dom level 2 namespace-aware methods for dealing with attr nodes directly (seldom used) setattribute (dom 1) setattributens setattributenode setattributenodens getattribute (dom 1) getattributens getattributenode getattributenodens hasattribute (dom 2) hasattributens - - removeattribute (dom 1) removeattributens removeattributenode - specifications ...
HTMLCanvasElement.mozGetAsFile() - Web APIs
Web › API › HTMLCanvasElement › mozGetAsFile
the non-standard, firefox-specific the htmlcanvaselement method mozgetasfile() returns a memory-based file object representing the image contained in the canvas.
... examples this example creates an image file from the <canvas> element on the page, then uses a filereader to read the image data from the file.
...then a new <img> element is created using the new data url.
... function draw() { var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); ctx.fillstyle = 'rgb(200, 0, 0)'; ctx.fillrect(10, 10, 55, 50); ctx.fillstyle = 'rgba(0, 0, 200, 0.5)'; ctx.fillrect(30, 30, 55, 50); var link = document.getelementbyid('link'); link.addeventlistener('click', copy); } function copy() { var canvas = document.getelementbyid('canvas'); var f = canvas.mozgetasfile('test.png'); var reader = new filereader(); reader.readasdataurl(f); reader.onloadend = function() { var newimg = document.createelement('img'); newimg.src = reader.result; document.body.appendchild(newimg); } } window.addeventlistener('load', draw); specifications not part of any specification.
HTMLCanvasElement.mozOpaque - Web APIs
Web › API › HTMLCanvasElement › mozOpaque
the non-standard htmlcanvaselement.mozopaque property is a boolean reflecting the moz-opaque html attribute of the <canvas> element.
... this has been standardized as setting the alpha option to false when creating a drawing context with htmlcanvaselement.getcontext().
... syntax var opaque = canvas.mozopaque; canvas.mozopaque = true; examples given this <canvas> element: <canvas id="canvas" width="300" height="300" moz-opaque></canvas> you can get or set the mozopaque property.
... var canvas = document.getelementbyid('canvas'); console.log(canvas.mozopaque); // true // deactivate it canvas.mozopaque = false; specifications not part of any standard.
HTMLCanvasElement.transferControlToOffscreen() - Web APIs
Web › API › HTMLCanvasElement › transferControlToOffscreen
the htmlcanvaselement.transfercontroltooffscreen() method transfers control to an offscreencanvas object, either on the main thread or on a worker.
... syntax offscreencanvas htmlcanvaselement.transfercontroltooffscreen() return value an offscreencanvas object.
... examples var htmlcanvas = document.createelement('canvas'); var offscreen = htmlcanvas.transfercontroltooffscreen(); var gl = offscreen.getcontext('webgl'); // ...
... // push frames back to the original htmlcanvaselement gl.commit(); specifications specification status comment html living standardthe definition of 'htmlcanvaselement.transfercontroltooffscreen()' in that specification.
HTMLDialogElement.open - Web APIs
Web › API › HTMLDialogElement › open
the open property of the htmldialogelement interface is a boolean reflecting the open html attribute, indicating whether the dialog is available for interaction.
...from there you can click the cancel button to close the dialog (via the htmldialogelement.close() method), or submit the form via the submit button.
...ion>red panda</option> <option>spider monkey</option> </select></p> </section> <menu> <button id="cancel" type="reset">cancel</button> <button type="submit">confirm</button> </menu> </form> </dialog> <menu> <button id="updatedetails">update details</button> </menu> <script> (function() { var updatebutton = document.getelementbyid('updatedetails'); var cancelbutton = document.getelementbyid('cancel'); var dialog = document.getelementbyid('favdialog'); dialog.returnvalue = 'favanimal'; function opencheck(dialog) { if(dialog.open) { console.log('dialog open'); } else { console.log('dialog closed'); } } // update button opens a modal dialog ...
... updatebutton.addeventlistener('click', function() { dialog.showmodal(); opencheck(dialog); }); // form cancel button closes the dialog box cancelbutton.addeventlistener('click', function() { dialog.close('animalnotchosen'); opencheck(dialog); }); })(); </script> note: you can find this example on github as htmldialogelement-basic (see it live also).
HTMLElement.click() - Web APIs
Web › API › HTMLElement › click
the htmlelement.click() method simulates a mouse click on an element.
... when click() is used with supported elements (such as an <input>), it fires the element's click event.
... this event then bubbles up to elements higher in the document tree (or event chain) and fires their click events.
... syntax element.click() example simulate a mouse-click when moving the mouse pointer over a checkbox: html <form> <input type="checkbox" id="mycheck" onmouseover="myfunction()" onclick="alert('click event occured')"> </form> javascript // on mouse-over, execute myfunction function myfunction() { document.getelementbyid("mycheck").click(); } specification specification status comment html living standard living standard document object model (dom) level 2 html specification obsolete initial definition.
HTMLFormElement.enctype - Web APIs
Web › API › HTMLFormElement › enctype
the htmlformelement.enctype property is the mime type of content that is used to submit the form to the server.
... multipart/form-data: the type that allows file <input> element(s) to upload file data.
... this value can be overridden by a formenctype attribute on a <button> or <input> element.
... syntax var string = form.enctype; form.enctype = string; example form.enctype = 'application/x-www-form-urlencoded'; specifications specification status comment html living standardthe definition of 'htmlformelement: enctype' in that specification.
HTMLFormElement.name - Web APIs
Web › API › HTMLFormElement › name
the htmlformelement.name property represents the name of the current <form> element as a string.
... if your <form> element contains an element named name then that element overrides the form.name property, so that you can't access it.
... internet explorer (ie) does not allow the name attribute of an element created using createelement() to be set or modified using the name property.
... syntax var string = form.name; form.name = string; example var form1name = document.getelementbyid('form1').name; if (form1name != document.form.form1) { // browser doesn't support this form of reference } specifications specification status comment html living standardthe definition of 'htmlformelement: name' in that specification.
HTMLFormElement.submit() - Web APIs
Web › API › HTMLFormElement › submit
the htmlformelement.submit() method submits a given <form>.
... the htmlformelement.requestsubmit() method is identical to activating a form's submit <button> and does not have these differences.
... <input> with attribute type="submit" will not be submitted with the form when using htmlformelement.submit(), but it would be submitted when you do it with original html form submit.
... syntax htmlformelement.submit() example document.forms["myform"].submit(); specifications specification status comment html living standardthe definition of 'htmlformelement: submit' in that specification.
HTMLImageElement.border - Web APIs
Web › API › HTMLImageElement › border
the obsolete htmlimageelement property border specifies the number of pixels thick the border surrounding the image should be.
... syntax htmlimageelement.border = thickness; let thickness = htmlimageelement.border; value a domstring containing an integer value specifying the thickness of the border that should surround the image, in css pixels.
...provide the same appearance using css instead of this obsolete property: <img src="image.png" style="border: 2px;"> you can further provide additional information to change the color and other features of the border: <img src="image.png" style="border: dashed 2px #333388;"> specifications specification status comment html living standardthe definition of 'htmlimageelement.border' in that specification.
... living standard html 4.01 specificationthe definition of 'htmlimageelement.border' in that specification.
HTMLImageElement.complete - Web APIs
Web › API › HTMLImageElement › complete
the read-only htmlimageelement interface's complete attribute is a boolean value which indicates whether or not the image has completely loaded.
... syntax let doneloading = htmlimageelement.complete; value a boolean value which is true if the image has completely loaded; otherwise, the value is false.
... the image element has previously determined that the image is fully available and ready for use.
...*/ function fixredeyecommand() { if (lightboxelem.style.display === "block" && lightboximgelem.complete) { fixredeye(lightboximgelem); } else { /* can't start doing this until the image is fully loaded */ } } specifications specification status comment html living standardthe definition of 'htmlimageelement.complete' in that specification.
HTMLImageElement.currentSrc - Web APIs
Web › API › HTMLImageElement › currentSrc
the read-only htmlimageelement property currentsrc indicates the url of the image which is currently presented in the <img> element it represents.
... syntax let currentsource = htmlimageelement.currentsrc; value a usvstring indicating the full url of the image currently visible in the <img> element represented by the htmlimageelement.
... this is useful when you provide multiple image options using the sizes and/or htmlimageelement.srcset properties.
... html <img src="/files/16797/clock-demo-400px.png" alt="clock" srcset="/files/16864/clock-demo-200px.png 200w, /files/16797/clock-demo-400px.png 400w" sizes="(max-width: 400px) 50%, 90%"> javascript var clockimage = document.queryselector("img"); let p = document.createelement("p"); if (!clockimage.currentsrc.endswith("200px.png")) { p.innertext = "using the 200px image."; } else { p.innertext = "using the 400px image!"; } document.body.appendchild(p); result specifications specification status comment html living standardthe definition of 'htmlimageelement.currentsrc' in that specification.
HTMLImageElement.decode() - Web APIs
Web › API › HTMLImageElement › decode
the decode() method of the htmlimageelement interface returns a promise that resolves when the image is decoded and it is safe to append the image to the dom.
... this can be used to initiate loading of the image prior to attaching it to an element in the dom (or adding it to the dom as a new element), so that the image can be rendered immediately upon being added to the dom.
... syntax var promise = htmlimageelement.decode(); parameters none.
... usage notes one potential use case for decode(): when loading very large images (for example, in an online photo album), you can present a low resolution thumbnail image initially and then replace that image with the full-resolution image by instantiating a new htmlimageelement, setting its source to the full-resolution image's url, then using decode() to get a promise which is resolved once the full-resolution image is ready for use.
HTMLImageElement.hspace - Web APIs
Web › API › HTMLImageElement › hspace
the obsolete hspace property of the htmlimageelement interface specifies the number of pixels of empty space to leave empty on the left and right sides of the <img> element when laying out the page.
... syntax htmlimageelement.hspace = marginwidth; marginwidth = htmlimageelement.hspace; value an integer value specifying the width, in pixels, of the horizontal margin to apply to the left and right sides of the image.
... specifications specification status comment html living standardthe definition of 'htmlimageelement.hspace' in that specification.
... living standard html 4.01 specificationthe definition of 'htmlimageelement.hspace' in that specification.
HTMLImageElement.longDesc - Web APIs
Web › API › HTMLImageElement › longDesc
the obsolete property longdesc on the htmlimageelement interface specifies the url of a text or html file which contains a long-form description of the image.
... syntax descurl = htmlimageelement.longdesc; htmlimageelement.longdesc = descurl; value a domstring which may be either an empty string (indicating that no long description is available) or the url of a file containing a long form description of the image's contents.
...instead of using longdesc to provide a link to a detailed description of an image, encapsulate the image within a link using the <a> element.
... specifications specification status comment html 4.01 specificationthe definition of 'htmlimageelement.longdesc' in that specification.
HTMLImageElement.sizes - Web APIs
Web › API › HTMLImageElement › sizes
the htmlimageelement property sizes allows you to specify the layout width of the image for each of a list of media conditions.
... syntax let sizes = htmlimageelement.sizes; htmlimageelement.sizes = sizes; value a usvstring containing a comma-separated list of source size descriptors followed by an optional fallback size.
... let image = document.queryselector("article img"); let break40 = document.getelementbyid("break40"); let break50 = document.getelementbyid("break50"); break40.addeventlistener("click", event => image.sizes = image.sizes.replace(/50em,/, "40em,")); break50.addeventlistener("click", event => image.sizes = image.sizes.replace(/40em,/, "50em,")); result this result may be viewed in its own window here.
... specifications specification status comment html living standardthe definition of 'htmlimageelement.sizes' in that specification.
HTMLImageElement.src - Web APIs
Web › API › HTMLImageElement › src
the htmlimageelement property src, which reflects the html src attribute, specifies the image to display in the <img> element.
... syntax htmlimageelement.src = newsource; let src = htmlimageelement.src; value when providing only a single image, rather than a set of images from which the browser selects the best match for the viewport size and display pixel density, the src attribute is a usvstring specifying the url of the desired image.
... this can be set either within the html itself using the src content attribute, or programmatically by setting the element's src property.
... html result specifications specification status comment html living standardthe definition of 'htmlimageelement.src' in that specification.
HTMLImageElement.vspace - Web APIs
Web › API › HTMLImageElement › vspace
the obsolete vspace property of the htmlimageelement interface specifies the number of pixels of empty space to leave empty on the top and bottom of the <img> element when laying out the page.
... syntax htmlimageelement.vspace = marginheight; marginheight = htmlimageelement.vspace; value an integer value specifying the height, in pixels, of the vertical margin to apply to the top and bottom sides of the image.
... specifications specification status comment html living standardthe definition of 'htmlimageelement.vspace' in that specification.
... living standard html 4.01 specificationthe definition of 'htmlimageelement.vspace' in that specification.
HTMLInputElement: invalid event - Web APIs
Web › API › HTMLInputElement › invalid event
the invalid event fires when a submittable element has been checked for validity and doesn't satisfy its constraints.
...the validity of submittable elements is checked before submitting their owner <form>, or after the checkvalidity() method of the element or its owner <form> is called.
... examples if a form is submitted with an invalid value, the submittable elements are checked and, if an error is found, the invalid event will fire on the invalid element.
... html <form action="#"> <ul> <li><label>enter an integer between 1 and 10: <input type="number" min="1" max="10" required></label></li> <li><input type="submit" value="submit"></li> </ul> </form><p id="log"></p> javascript const input = document.queryselector('input') const log = document.getelementbyid('log') input.addeventlistener('invalid', logvalue) function logvalue(e) { log.textcontent += e.target.value } result specifications specification status comment html living standardthe definition of 'invalid event' in that specification.
HTMLInputElement.select() - Web APIs
Web › API › HTMLInputElement › select
the htmlinputelement.select() method selects all the text in a <textarea> element or in an <input> element that includes a text field.
... syntax element.select(); example click the button in this example to select all the text in the <input> element.
... html <input type="text" id="text-box" size="20" value="hello world!"> <button onclick="selecttext()">select text</button> javascript function selecttext() { const input = document.getelementbyid('text-box'); input.focus(); input.select(); } result notes calling element.select() will not necessarily focus the input, so it is often used with htmlelement.focus().
... in browsers where it is not supported, it is possible to replace it with a call to htmlinputelement.setselectionrange() with parameters 0 and the input's value length: <input onclick="this.select();" value="sample text" /> <!-- equivalent to --> <input onclick="this.setselectionrange(0, this.value.length);" value="sample text" /> specifications specification status comment html living standardthe definition of 'select' in that specification.
HTMLInputElement.setRangeText() - Web APIs
Web › API › HTMLInputElement › setRangeText
the htmlinputelement.setrangetext() method replaces a range of text in an <input> or <textarea> element with a new string.
... syntax element.setrangetext(replacement); element.setrangetext(replacement, start, end [, selectmode]); parameters replacement the string to insert.
... html <input type="text" id="text-box" size="30" value="this text has not been updated."> <button onclick="selecttext()">update text</button> javascript function selecttext() { const input = document.getelementbyid('text-box'); input.focus(); input.setrangetext('already', 14, 17, 'select'); } result specifications specification status comment html living standardthe definition of 'htmlinputelement.setselectionrange()' in that specification.
... living standard no change html5the definition of 'htmlinputelement.setselectionrange()' in that specification.
HTMLLabelElement.htmlFor - Web APIs
Web › API › HTMLLabelElement › htmlFor
the htmllabelelement.htmlfor property reflects the value of the for content property.
... that means that this script-accessible property is used to set and read the value of the content property for, which is the id of the label's associated control element.
... syntax controlid = htmllabelelement.htmlfor htmllabelelement.htmlfor = newid value a domstring which contains the id string of the element which is associated with the control.
... if this property has a value, the htmllabelelement.control property must refer to the same control.
HTMLMediaElement.currentSrc - Web APIs
Web › API › HTMLMediaElement › currentSrc
the htmlmediaelement.currentsrc property contains the absolute url of the chosen media resource.
... syntax var mediaurl = audioobject.currentsrc; value a domstring object containing the absolute url of the chosen media source; this may be an empty string if networkstate is empty; otherwise, it will be one of the resources listed by the htmlsourceelement contained within the media element, or the value or src if no <source> element is provided.
... example var obj = document.createelement('video'); console.log(obj.currentsrc); // "" specifications specification status comment html living standardthe definition of 'htmlmediaelement.currentsrc' in that specification.
... living standard no change from html5 html5the definition of 'htmlmediaelement.currentsrc' in that specification.
HTMLMediaElement.ended - Web APIs
Web › API › HTMLMediaElement › ended
the htmlmediaelement.ended indicates whether the media element has ended playback.
... syntax var isended = htmlmediaelement.ended value a boolean which is true if the media contained in the element has finished playing.
... example var obj = document.createelement('video'); console.log(obj.ended); // false specifications specification status comment html living standardthe definition of 'htmlmediaelement.ended' in that specification.
... living standard html5the definition of 'htmlmediaelement.ended' in that specification.
HTMLMediaElement.onencrypted - Web APIs
Web › API › HTMLMediaElement › onencrypted
the onencrypted property of the htmlmediaelement is an event handler, fired whenever an encrypted event occurs, denoting the media is encrypted.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlmediaelement" target="_top"><rect x="331" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-f...
...amily="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlmediaelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} syntax htmlmediaelement.onencrypted = function(encrypted) { ...
HTMLMediaElement.onwaitingforkey - Web APIs
Web › API › HTMLMediaElement › onwaitingforkey
the onwaitingforkey property of the htmlmediaelement is an event handler, fired when a waitingforkey event occurs, when playback is blocked while waiting for an encryption key.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlmediaelement" target="_top"><rect x="331" y="65" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="411" y="94" font-size="12px" font-f...
...amily="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlmediaelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} syntax htmlmediaelement.onwaitingforkey = function(waitingforkey) { ...
HTMLMediaElement.playbackRate - Web APIs
Web › API › HTMLMediaElement › playbackRate
the htmlmediaelement.playbackrate property sets the rate at which the media is being played back.
...some browsers implement the non-standard htmlmediaelement.preservespitch property to control this.
...(default: 1.0) example var obj = document.createelement('video'); console.log(obj.playbackrate); // expected output: 1 specifications specification status comment html living standardthe definition of 'htmlmediaelement.playbackrate' in that specification.
... living standard html5the definition of 'htmlmediaelement.playbackrate' in that specification.
HTMLMediaElement.readyState - Web APIs
Web › API › HTMLMediaElement › readyState
the htmlmediaelement.readystate property indicates the readiness state of the media.
... examples this example will listen for audio data to be loaded for the element `example`.
... <audio id="example" preload="auto"> <source src="sound.ogg" type="audio/ogg" /> </audio> var obj = document.getelementbyid('example'); obj.addeventlistener('loadeddata', function() { if(obj.readystate >= 2) { obj.play(); } }); specifications specification status comment html living standardthe definition of 'htmlmediaelement.readystate' in that specification.
... living standard html5the definition of 'htmlmediaelement.readystate' in that specification.
HTMLMenuItemElement - Web APIs
Web › API › HTMLMenuItemElement
the htmlmenuitemelement interface provides special properties (beyond those defined on the regular htmlelement interface it also has available to it by inheritance) for manipulating <menuitem> elements.
...eight="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="188.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">node</text></a><polyline points="226,25 236,20 236,30 226,25" stroke="#d4dde4" fill="none"/><line x1="236" y1="25" x2="266" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/element" target="_top"><rect x="266" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="303.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">element</text></a><polyline points="341,25 351,20 351,30 341,25" stroke="#d4dde4" fill="none"/><line x1="351" y1="25" x2="381" y2="...
...25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlelement" target="_top"><rect x="381" y="1" width="110" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="436" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlelement</text></a><polyline points="491,25 501,20 501,30 491,25" stroke="#d4dde4" fill="none"/><line x1="501" y1="25" x2="509" y2="25" stroke="#d4dde4"/><line x1="509" y1="25" x2="509" y2="90" stroke="#d4dde4"/><line x1="509" y1="90" x2="492" y2="90" stroke="#d4dde4"/><a xlink:href="/docs/web/api/htmlmenuitemelement" target="_top"><rect x="301" y="65" width="190" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="396" y="94" font-size="12px" fon...
...t-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlmenuitemelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} propertiesthis interface has no properties, but inherits properties from: htmlelementmethodsthis interface has no methods, but inherits methods from: htmlelement specifications specification status comment html 5.1the definition of 'htmlmenuitemelement' in that specification.
HTMLScriptElement.referrerPolicy - Web APIs
Web › API › HTMLScriptElement › referrerPolicy
the referrerpolicy property of the htmlscriptelement interface reflects the html referrerpolicy of the <script> element and fetches made by that script, defining which referrer is sent when fetching the resource.
...if referrerpolicy is not explicitly specified on the <script> element, it will adopt a higher-level referrer policy, i.e.
... examples var scriptelem = document.createelement("script"); scriptelem.src = "/"; scriptelem.referrerpolicy = "unsafe-url"; document.body.appendchild(script); specifications specification status comment referrer policythe definition of 'referrerpolicy attribute' in that specification.
... html living standardthe definition of 'htmlscriptelement: referrerpolicy' in that specification.
HTMLSelectElement.checkValidity() - Web APIs
Web › API › HTMLSelectElement › checkValidity
the htmlselectelement.checkvalidity() method checks whether the element has any constraints and whether it satisfies them.
... if the element fails its constraints, the browser fires a cancelable invalid event at the element, and then returns false.
... syntax var result = selectelt.checkvalidity(); specifications specification status comment html living standardthe definition of 'htmlselectelement.checkvalidity()' in that specification.
... html5the definition of 'htmlselectelement.checkvalidity()' in that specification.
HTMLSelectElement.item() - Web APIs
Web › API › HTMLSelectElement › item
the htmlselectelement.item() method returns the element corresponding to the htmloptionelement whose position in the options list corresponds to the index given in the parameter, or null if there are none.
... return value item is a htmloptionelement.
... examples html <form> <select id="myformcontrol" type="textarea"> <option id="o1">opt 1</option> <option id="o2">opt 2</option> </select> </form> javascript // returns the htmloptionelement representing #o2 elem1 = document.forms[0]['myformcontrol'][1]; specifications specification status comment html living standardthe definition of 'htmlselectelement.item()' in that specification.
... html5the definition of 'htmlselectelement.item()' in that specification.
HTMLSelectElement.namedItem() - Web APIs
Web › API › HTMLSelectElement › namedItem
the htmlselectelement.nameditem() method returns the htmloptionelement corresponding to the htmloptionelement whose name or id match the specified name, or null if no option matches.
... return value item is a htmloptionelement.
... example html <form> <select id="myformcontrol"> <option id="o1">opt 1</option> <option id="o2">opt 2</option> </select> </form> javascript elem1 = document.forms[0]['myformcontrol']['o1']; // returns the htmloptionelement representing #o1 specifications specification status comment html living standardthe definition of 'htmlselectelement.nameditem()' in that specification.
... html5the definition of 'htmlselectelement.nameditem()' in that specification.
HTMLSelectElement.selectedIndex - Web APIs
Web › API › HTMLSelectElement › selectedIndex
the htmlselectelement.selectedindex is a long that reflects the index of the first or last selected <option> element, depending on the value of multiple.
... the value -1 indicates that no element is selected.
... syntax var index = selectelem.selectedindex; selectelem.selectedindex = index; example html <p id="p">selectedindex: 0</p> <select id="select"> <option selected>option a</option> <option>option b</option> <option>option c</option> <option>option d</option> <option>option e</option> </select> javascript var selectelem = document.getelementbyid('select') var pelem = document.getelementbyid('p') // when a new <option> is selected selectelem.addeventlistener('change', function() { var index = selectelem.selectedindex; // add that data to the <p> pelem.innerhtml = 'selectedindex: ' + index; }) specifications specification status comment html living standardthe definition of 'htmlselectelement' in that specification.
... html5the definition of 'htmlselectelement' in that specification.
HTMLSelectElement.setCustomValidity() - Web APIs
Web › API › HTMLSelectElement › setCustomValidity
the htmlselectelement.setcustomvalidity() method sets the custom validity message for the selection element to the specified message.
... use the empty string to indicate that the element does not have a custom validity error.
... specifications specification status comment html living standardthe definition of 'htmlselectelement.setcustomvalidity()' in that specification.
... html5the definition of 'htmlselectelement.setcustomvalidity()' in that specification.
HTMLSlotElement.name - Web APIs
Web › API › HTMLSlotElement › name
the name property of the htmlslotelement interface returns or sets the slot name.
... syntax var name = htmlslotelement.name htmlslotelement.name = name value a domstring.
... let slots = this.shadowroot.queryselectorall('slot'); slots[1].addeventlistener('slotchange', function(e) { let nodes = slots[1].assignednodes(); console.log('element in slot "' + slots[1].name + '" changed to "' + nodes[0].outerhtml + '".'); }); here we grab references to all the slots, then add a slotchange event listener to the 2nd slot in the template — which is the one that keeps having its contents changed in the example.
... every time the element inserted in the slot changes, we log a report to the console saying which slot has changed, and what the new node inside the slot is.
HTMLSlotElement: slotchange event - Web APIs
Web › API › HTMLSlotElement › slotchange event
the slotchange event is fired on an htmlslotelement instance (<slot> element) when the node(s) contained in that slot change.
... examples element.setattribute('slot', slotname); // element.assignedslot = $slot element.removeattribute('slot'); // element.assignedslot = null the following snippet is taken from our slotchange example (see it live also).
... let slots = this.shadowroot.queryselectorall('slot'); slots[1].addeventlistener('slotchange', function(e) { let nodes = slots[1].assignednodes(); console.log('element in slot "' + slots[1].name + '" changed to "' + nodes[0].outerhtml + '".'); }); here we grab references to all the <slot>s, then add a slotchange event listener to the template's second slot — which is the one which has its contents changed in the example.
... every time the element inserted in the slot changes, we log a report to the console saying which slot has changed, and what the new node inside the slot is.
HTMLTableElement.deleteCaption() - Web APIs
Web › API › HTMLTableElement › deleteCaption
the htmltableelement.deletecaption() method removes the <caption> element from a given <table>.
... if there is no <caption> element associated with the table, this method does nothing.
... syntax htmltableelement.deletecaption() example this example uses javascript to delete a table's caption.
... html <table> <caption>this caption will be deleted!</caption> <tr><td>cell 1.1</td><td>cell 1.2</td></tr> <tr><td>cell 2.1</td><td>cell 2.2</td></tr> </table> javascript let table = document.queryselector('table'); table.deletecaption(); result specifications specification status comment html living standardthe definition of 'htmltableelement: deletecaption' in that specification.
HTMLTableElement.tBodies - Web APIs
Web › API › HTMLTableElement › tBodies
the htmltableelement.tbodies read-only property returns a live htmlcollection of the bodies in a <table>.
... the collection returned includes implicit <tbody> elements.
... for example: <table> <tr> <td>cell one</td> </tr> </table> the html dom generated from the above html will have a <tbody> element even though the tags are not included in the source html.
... mytable.tbodies.length; specifications specification status comment html living standardthe definition of 'htmltableelement: tbodies' in that specification.
HTMLTableRowElement.rowIndex - Web APIs
Web › API › HTMLTableRowElement › rowIndex
the htmltablerowelement.rowindex read-only property represents the position of a row in relation to the whole <table>.
... even when the <thead>, <tbody>, and <tfoot> elements are out of order in the html, browsers render the table in the right order.
... syntax var index = htmltablerowelement.rowindex value returns the index of the row, or -1 if the row is not part of a table.
...<tr><th>item</th> <th>price</th></tr> </thead> <tbody> <tr><td>bananas</td> <td>$2</td></tr> <tr><td>oranges</td> <td>$8</td></tr> <tr><td>top sirloin</td> <td>$20</td></tr> </tbody> <tfoot> <tr><td>total</td> <td>$30</td></tr> </tfoot> </table> javascript let rows = document.queryselectorall('tr'); rows.foreach((row) => { let z = document.createelement("td"); z.textcontent = `(row #${row.rowindex})`; row.appendchild(z); }); result ...
HTMLTimeElement.dateTime - Web APIs
Web › API › HTMLTimeElement › dateTime
the htmltimeelement.datetime property is a domstring that reflects the datetime html attribute, containing a machine-readable form of the element's date and time value.
....xxs pddthhmms.xxxs pthhmmss pthhmms.xs pthhmms.xxs pthhmms.xxxs ww dd hh mm ss p12dt7h12m13s p12dt7h12m13.3s p12dt7h12m13.45s p12dt7h12m13.455s pt7h12m13s pt7h12m13.2s pt7h12m13.56s pt7h12m13.999s 7d 5h 24m 13s syntax datetimestring = timeelt.datetime; timeelt.datetime = datetimestring example // assumes there is <time id="t"> element in the html var t = document.getelementbyid("t"); t.datetime = "6w 5h 34m 5s"; specifications specification status comment html living standardthe definition of 'htmltimeelement' in that specification.
... html 5.1the definition of 'htmltimeelement' in that specification.
... html5the definition of 'htmltimeelement' in that specification.
HTMLTrackElement.src - Web APIs
Web › API › HTMLTrackElement › src
the htmltrackelement.src property reflects the value of the <track> element's src attribute, which indicates the url of the text track's data.
... syntax var texttrackurl = htmltrackelement.src; value a domstring object containing the url of the text track data.
... example // coming soon specifications specification status comment html living standardthe definition of 'htmltrackelement.src' in that specification.
... living standard no change from html5 html5the definition of 'htmltrackelement.src' in that specification.
HTMLVideoElement.getVideoPlaybackQuality() - Web APIs
Web › API › HTMLVideoElement › getVideoPlaybackQuality
the htmlvideoelement method getvideoplaybackquality() creates and returns a videoplaybackquality object containing metrics including how many frames have been lost.
... syntax videopq = videoelement.getvideoplaybackquality(); return value a videoplaybackquality object providing information about the video element's current playback quality.
... example this example updates an element to indicate the total number of video frames that have elapsed so far in the playback process.
... this value includes any dropped or corrupted frames, so it's not the same as "total number of frames played." var videoelem = document.getelementbyid("my_vid"); var counterelem = document.getelementbyid("counter"); var quality = videoelem.getvideoplaybackquality(); counterelem.innertext = quality.totalvideoframes; specifications specification status comment media playback qualitythe definition of 'htmlvideoelement.getvideoplaybackquality()' in that specification.
Node.parentElement - Web APIs
Web › API › Node › parentElement
the node.parentelement read-only property returns the dom node's parent element, or null if the node either has no parent, or its parent isn't a dom element.
... syntax parentelement = node.parentelement parentelement is the parent element of the current node.
... this is always a dom element object, or null.
... example if (node.parentelement) { node.parentelement.style.color = "red"; } specifications specification status comment domthe definition of 'parentelement' in that specification.
SVGAnimationElement: beginEvent event - Web APIs
Web › API › SVGAnimationElement › beginEvent event
the beginevent event of the svganimationelement interface is fired when the element local timeline begins to play.
... it will be raised each time the element begins the active duration (i.e., when it restarts, but not when it repeats).
...scheduled or interactive) timeline play, as well as in the case that the element was begun with a dom method.
...ur="5s" repeatcount="indefinite" /> </circle> </svg> <hr> <ul> </ul> ul { height: 100px; border: 1px solid #ddd; overflow-y: scroll; padding: 10px 30px; } let svgelem = document.queryselector('svg'); let animateelem = document.queryselector('animatemotion'); let list = document.queryselector('ul'); animateelem.addeventlistener('beginevent', () => { let listitem = document.createelement('li'); listitem.textcontent = 'beginevent fired'; list.appendchild(listitem); }) animateelem.addeventlistener('repeatevent', (e) => { let listitem = document.createelement('li'); let msg = 'repeatevent fired'; if(e.detail) { msg += '; repeat number: ' + e.detail; } listitem.textcontent = msg; list.appendchild(listitem); }) event handler property equivalent note that you ...
SVGGeometryElement.pathLength - Web APIs
Web › API › SVGGeometryElement › pathLength
the svggeometryelement.pathlength property reflects the pathlength attribute and returns the total length of the path, in user units.
... note: this property was originally part of the svgpathelement interface.
... svg 2 introduced the svggeometryelement interface and moved the property to it.
... syntax var pathlength = someelement.pathlength; specifications specification status comment scalable vector graphics (svg) 2the definition of 'svggeometryelement.pathlength' in that specification.
SVGGraphicsElement: paste event - Web APIs
Web › API › SVGGraphicsElement › paste event
the paste event is fired on an svggraphicselement when the user has initiated a "paste" action through the browser's user interface.
... bubbles yes cancelable yes interface clipboardevent event handler property onpaste if the cursor is in an editable context (for example, in a <textarea> or an element with contenteditable attribute set to true) then the default action is to insert the contents of the clipboard into the document at the cursor position.
... example html <?xml version="1.0" encoding="utf-8"?> <svg viewbox="0 0 140 30" width="600" height="320" xmlns="http://www.w3.org/2000/svg"> <foreignobject x="5" y="-10" width="90" height="20"> <input xmlns="http://www.w3.org/1999/xhtml" value="copy this text"/> </foreignobject> <text x="5" y="30" id="element-to-paste-text" tabindex="1">paste it here</text> </svg> css input { font-size: 10px; width: 100%; height: 90%; box-sizing: border-box; border: 1px solid black; } javascript document.getelementbyid("element-to-paste-text").addeventlistener("paste", evt => { evt.target.textcontent = evt.clipboarddata.getdata("text/plain").touppercase(); evt.preventdefault(); }); result specifi...
...cations specification status comment scalable vector graphics (svg) 2 candidate recommendation definition that the clipboard events apply to svg elements.
SVGMeshElement - Web APIs
Web › API › SVGMeshElement
the svgmeshelement interface provides access to the properties of <mesh> elements.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgmeshelement" target="_top"><rect x="1" y="1" width="140" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="71" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgmeshelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface doesn't implement any specific properties, but inherits propert...
...ies from its parent interface, svggeometryelement, and implements the properties of svgurireference.
... methods this interface doesn't implement any specific methods, but inherits methods from its parent interface, svggeometryelement, and implements the methods of svgurireference.
SVGPathElement.getPointAtLength() - Web APIs
Web › API › SVGPathElement › getPointAtLength
the svgpathelement.getpointatlength() method returns the point at a given distance along the path.
... note: in svg 2 this property was moved to the svggeometryelement interface, from which the svgpathelement inherits it.
... syntax svgpoint someelement.getpointatlength(float distance); parameters distance a float referring to the distance along the path.
... specifications specification status comment scalable vector graphics (svg) 1.1 (second edition)the definition of 'svgpathelement.gettotallength()' in that specification.
SVGPathElement.getTotalLength() - Web APIs
Web › API › SVGPathElement › getTotalLength
the svgpathelement.gettotallength() method returns the user agent's computed value for the total length of the path in user units.
... note: in svg 2 this method was moved to the svggeometryelement interface, from which the svgpathelement inherits it.
... syntax float someelement.gettotallength(); return value a float indicating the total length of the path in user units.
... specifications specification status comment scalable vector graphics (svg) 1.1 (second edition)the definition of 'svgpathelement.gettotallength()' in that specification.
SVGSolidcolorElement - Web APIs
Web › API › SVGSolidcolorElement
the svgsolidcolorelement interface corresponds to the <solidcolor> element.
... <div id="interfacediagram" style="display: inline-block; position: relative; width: 100%; padding-bottom: 23.333333333333332%; vertical-align: middle; overflow: hidden;"><svg style="display: inline-block; position: absolute; top: 0; left: 0;" viewbox="-50 0 600 140" preserveaspectratio="xminymin meet"><a xlink:href="/docs/web/api/svgsolidcolorelement" target="_top"><rect x="1" y="1" width="200" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="101" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgsolidcolorelement</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties this interface doesn't implement any specific properties, but inh...
...erits properties from its parent interface, svgelement.
... methods this interface doesn't implement any specific methods, but inherits methods from its parent interface, svgelement.
Text.isElementContentWhitespace - Web APIs
Web › API › Text › isElementContentWhitespace
the text.iselementcontentwhitespace read-only property returns a boolean flag indicating whether or not the text node's content consists solely of whitespace.
... syntax b = textnode.iselementcontentwhitespace; example in the example below, we create a node with mixed display and whitespace characters and the attribute is false.
... var tn = document.createtextnode("hello world"); tn.iselementcontentwhitespace; /* evaluates to false */ for a node that is all whitespace characters, the iselementcontentwhitespace evaluates to true.
... var ws = document.createtextnode(" \t \r\n ") ws.iselementcontentwhitespace; /* evaluates to true */ ...
::-webkit-meter-inner-element - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-meter-inner-element
::-webkit-meter-inner-element is a proprietary webkit css pseudo-element for selecting and applying styles to to the outer containing element of a <meter> element.
... additional markup to render the meter element as read-only.
... syntax ::-webkit-meter-inner-element specifications not part of any standard.
... html <meter min="0" max="10" value="6">score out of 10</meter> css meter { /* reset the default appearance */ -webkit-appearance: none; -moz-appearance: none; appearance: none; } meter::-webkit-meter-inner-element { -webkit-appearance: inherit; box-sizing: inherit; border: 1px solid #aaa; } result ...
<bgsound>: The Background Sound element (obsolete) - HTML: Hypertext Markup Language
Web › HTML › Element › bgsound
the internet explorer only html background sound element (<bgsound>) sets up a sound file to play in the background while the page is used; use <audio> instead.
...in order to embed audio in a web page, you should be using the <audio> element.
... example <bgsound src="sound1.mid"> <bgsound src="sound2.au" loop="infinite"> usage notes historically, the <embed> element could be used with audio player plug-ins to play audio in the background in most browsers.
... you can write <bgsound> as a self-closing tag (<bgsound />); however, since this element is non-standard, doing so will still not validate.
<datalist>: The HTML Data List element - HTML: Hypertext Markup Language
Web › HTML › Element › datalist
the html <datalist> element contains a set of <option> elements that represent the permissible or recommended options available to choose from within other controls.
... permitted content either phrasing content or zero or more <option> elements.
... permitted parents any element that accepts phrasing content.
... implicit aria role listbox permitted aria roles no role permitted dom interface htmldatalistelement attributes this element has no other attributes than the global attributes, common to all elements.
<dd>: The Description Details element - HTML: Hypertext Markup Language
Web › HTML › Element › dd
the html <dd> element provides the description, definition, or value for the preceding term (<dt>) in a description list (<dl>).
...the end tag may be omitted if the <dd> element is immediately followed by another <dd> element or a <dt> element, or if there is no more content in the parent element.
... previous sibling <dt> or another <dd> element.
... implicit aria role definition permitted aria roles no role permitted dom interface htmlelement attributes this element's attributes include the global attributes.
<image>: The obsolete Image element - HTML: Hypertext Markup Language
Web › HTML › Element › image
the obsolete html image element (<image>) is an obsolete remnant of an ancient version of html lost in the mists of time; use the standard <img> element instead.
... seriously, the specification even literally uses the words "don't ask" when describing this element.
...in order to display images, use the standard <img> element.
... while some browsers will attempt to automatically convert this into an <img> element, they won't always do so, and won't always succeed when they try, due to various ways in which the options can be interpreted.
<noembed>: The Embed Fallback element (Obsolete) - HTML: Hypertext Markup Language
Web › HTML › Element › noembed
the <noembed> element is an obsolete, non-standard way to provide alternative, or "fallback", content for browsers that do not support the <embed> element or do not support the type of embedded content an author wishes to use.
... this element was deprecated in html 4.01 and above in favor of placing fallback content between the opening and closing tags of an <object> element.
... while this element currently still works in many browsers, it is obsolete and should not be used.
... use <object> instead, with fallback content between the opening and closing tags of the element.
<param>: The Object Parameter element - HTML: Hypertext Markup Language
Web › HTML › Element › param
the html <param> element defines parameters for an <object> element.
... permitted content none, it is an empty element.
... tag omission as it is a void element, the start tag must be present and the end tag must not be present.
... implicit aria role no corresponding role permitted aria roles no role permitted dom interface htmlparamelement attributes this element includes the global attributes.
<small>: the side comment element - HTML: Hypertext Markup Language
Web › HTML › Element › small
the html <small> element represents side-comments and small print, like copyright and legal text, independent of its styled presentation.
... permitted parents any element that accepts phrasing content, or any element that accepts flow content.
... implicit aria role no corresponding role permitted aria roles any dom interface htmlelement attributes this element only includes the global attributes.
... recommendation notes although the <small> element, like the <b> and <i> elements, may be perceived to violate the principle of separation between structure and presentation, all three are valid in html5.
<sup>: The Superscript element - HTML: Hypertext Markup Language
Web › HTML › Element › sup
the html superscript element (<sup>) specifies inline text which is to be displayed as superscript for solely typographical reasons.
... permitted parents any element that accepts phrasing content.
... implicit aria role no corresponding role permitted aria roles any dom interface htmlelement attributes this element only includes the global attributes.
... usage notes the <sup> element should only be used for typographical reasons—that is, to change the position of the text to comply with typographical conventions or standards, rather than solely for presentation or appearance purposes.
TypedArray.BYTES_PER_ELEMENT - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › BYTES PER ELEMENT
the typedarray.bytes_per_element property represents the size in bytes of each element in an typed array.
... property attributes of typedarray.bytes_per_element writable no enumerable no configurable no description typedarray objects differ from each other in the number of bytes per element and in the way the bytes are interpreted.
... the bytes_per_element constant contains the number of bytes each element in the given typedarray has.
... examples using bytes_per_element int8array.bytes_per_element; // 1 uint8array.bytes_per_element; // 1 uint8clampedarray.bytes_per_element; // 1 int16array.bytes_per_element; // 2 uint16array.bytes_per_element; // 2 int32array.bytes_per_element; // 4 uint32array.bytes_per_element; // 4 float32array.bytes_per_element; // 4 float64array.bytes_per_element; // 8 specifications specification ecmascript (ecma-262)the definition of 'typedarray.bytes_per_element' in that specification.
XForms Trigger Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Trigger
attributes ui common appearance - the value of this attribute gives a hint to the xforms processor as to which type of widget(s) to use to represent this control accesskey - used to specify the keyboard shortcut for focusing this control single-node binding type restrictions the trigger element can be bound to a node containing data of any type.
... actually, the trigger element doesn't interact with the data in the bound node.
... representations the xforms trigger element can be represented by the following widgets for the specified appearance attribute values: button - default representation (xhtml/xul) link/clickable text - used when appearance = 'minimal' (xhtml only) button displaying a button is the default presentation (xhtml/xul).
XForms Upload Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Upload
the xforms author can set the filter by using the mediatype attribute directly on the upload element or by placing a mediatype element (see the spec) as a direct child of the upload element.
... type restrictions the upload element can be bound to a node of type xsd:anyuri, xsd:base64binary or xsd:hexbinary or any type derived from one of these.
... representations the xforms upload element is represented by visually combining three widgets: a text field that shows the uri of the selected file, a button to open the file picker dialog which allows the user to select a file, and a button to clear the text field and the reference to the file from the bound node (xhtml only).
Pseudo-element - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Pseudo-element
in css, a pseudo-element selector applies styles to parts of your document content in scenarios where there isn't a specific html element to select.
... for example, rather than putting the first letter of each paragraph in its own element, you can style them all with p::first-letter.
... learn more technical reference pseudo-elements ...
HTMLIFrameElement.getScreenshot()
Mozilla › Gecko › Chrome › API › Browser API › getScreenshot
the getscreenshot() method of the htmliframeelement lets you request a screenshot of a content <iframe>, scaled to fit within a specified maximum width and height.
...it won't wait more than 2000ms (this delay is defined by the gecko dom.browserelement.maxscreenshotdelayms preference).
... syntax var instanceofdomrequest = instanceofhtmliframeelement.getscreenshot(maxwidth, maxheight, mimetype); returns a domrequest for handling the screenshot request.
nsIDOMHTMLAudioElement
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMHTMLAudioElement
the nsidomhtmlaudioelement interface is used to implement the html5 <audio> element.
... dom/interfaces/html/nsidomhtmlaudioelement.idlscriptable please add a summary to this article.
... last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) inherits from: nsidomhtmlmediaelement method overview unsigned long long mozcurrentsampleoffset(); void mozsetup(in pruint32 channels, in pruint32 rate); [implicit_jscontext] unsigned long mozwriteaudio(in jsval data); methods mozcurrentsampleoffset() non-standard this feature is non-standard and is not on a standards track.
nsIDOMXULControlElement
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMXULControlElement
dom/interfaces/xul/nsidomxulcontrolelement.idlscriptable provides additional attributes specific to control elements.
... 66 introduced gecko 1.0 inherits from: nsidomxulelement last changed in gecko 1.0 attributes attribute type description disabled boolean indicates whether the element is disabled or not.
... tabindex long the tab order of the element.
AnimationEvent.pseudoElement - Web APIs
Web › API › AnimationEvent › pseudoElement
summary the animationevent.pseudoelement read-only property is a domstring, starting with '::', containing the name of the pseudo-element the animation runs on.
... if the animation doesn't run on a pseudo-element but on the element, an empty string: ''.
... syntax name = animationevent.pseudoelement specifications specification status comment css animationsthe definition of 'animationevent.pseudoelement' in that specification.
DocumentOrShadowRoot.pointerLockElement - Web APIs
Web › API › DocumentOrShadowRoot › pointerLockElement
the pointerlockelement property of the document and shadowroot interfaces provides the element set as the target for mouse events while the pointer is locked.
... syntax var element = document.pointerlockelement; return value an element or null.
... specifications specification status comment pointer lockthe definition of 'pointerlockelement' in that specification.
Element: compositionend event - Web APIs
Web › API › Element › compositionend event
bubbles yes cancelable yes interface compositionevent event handler property none examples const inputelement = document.queryselector('input[type="text"]'); inputelement.addeventlistener('compositionend', (event) => { console.log(`generated characters were: ${event.data}`); }); live example html <div class="control"> <label for="name">on macos, click in the textbox below,<br> then type <kbd>option</kbd> + <kbd>`</kbd>, then <kbd>a</kbd>:</label> <input type="text" id="example" name="example"> ...
...lear</button> </div> css body { padding: .2rem; display: grid; grid-template-areas: "control log"; } .control { grid-area: control; } .event-log { grid-area: log; } .event-log-contents { resize: none; } label, button { display: block; } input[type="text"] { margin: .5rem 0; } kbd { border-radius: 3px; padding: 1px 2px 0; border: 1px solid black; } js const inputelement = document.queryselector('input[type="text"]'); const log = document.queryselector('.event-log-contents'); const clearlog = document.queryselector('.clear-log'); clearlog.addeventlistener('click', () => { log.textcontent = ''; }); function handleevent(event) { log.textcontent = log.textcontent + `${event.type}: ${event.data}\n`; } inputelement.addeventlistener('compositionstart', handl...
...eevent); inputelement.addeventlistener('compositionupdate', handleevent); inputelement.addeventlistener('compositionend', handleevent); result specifications specification status ui events working draft ...
Element: compositionstart event - Web APIs
Web › API › Element › compositionstart event
bubbles yes cancelable yes interface compositionevent event handler property none examples const inputelement = document.queryselector('input[type="text"]'); inputelement.addeventlistener('compositionstart', (event) => { console.log(`generated characters were: ${event.data}`); }); live example html <div class="control"> <label for="name">on macos, click in the textbox below,<br> then type <kbd>option</kbd> + <kbd>`</kbd>, then <kbd>a</kbd>:</label> <input type="text" id="example" name="example"...
...lear</button> </div> css body { padding: .2rem; display: grid; grid-template-areas: "control log"; } .control { grid-area: control; } .event-log { grid-area: log; } .event-log-contents { resize: none; } label, button { display: block; } input[type="text"] { margin: .5rem 0; } kbd { border-radius: 3px; padding: 1px 2px 0; border: 1px solid black; } js const inputelement = document.queryselector('input[type="text"]'); const log = document.queryselector('.event-log-contents'); const clearlog = document.queryselector('.clear-log'); clearlog.addeventlistener('click', () => { log.textcontent = ''; }); function handleevent(event) { log.textcontent = log.textcontent + `${event.type}: ${event.data}\n`; } inputelement.addeventlistener('compositionstart', handl...
...eevent); inputelement.addeventlistener('compositionupdate', handleevent); inputelement.addeventlistener('compositionend', handleevent); result specifications specification status ui events working draft ...
Element: compositionupdate event - Web APIs
Web › API › Element › compositionupdate event
bubbles yes cancelable yes interface compositionevent event handler property none examples const inputelement = document.queryselector('input[type="text"]'); inputelement.addeventlistener('compositionupdate', (event) => { console.log(`generated characters were: ${event.data}`); }); live example html <div class="control"> <label for="name">on macos, click in the textbox below,<br> then type <kbd>option</kbd> + <kbd>`</kbd>, then <kbd>a</kbd>:</label> <input type="text" id="example" name="example...
...lear</button> </div> css body { padding: .2rem; display: grid; grid-template-areas: "control log"; } .control { grid-area: control; } .event-log { grid-area: log; } .event-log-contents { resize: none; } label, button { display: block; } input[type="text"] { margin: .5rem 0; } kbd { border-radius: 3px; padding: 1px 2px 0; border: 1px solid black; } js const inputelement = document.queryselector('input[type="text"]'); const log = document.queryselector('.event-log-contents'); const clearlog = document.queryselector('.clear-log'); clearlog.addeventlistener('click', () => { log.textcontent = ''; }); function handleevent(event) { log.textcontent = log.textcontent + `${event.type}: ${event.data}\n`; } inputelement.addeventlistener('compositionstart', handl...
...eevent); inputelement.addeventlistener('compositionupdate', handleevent); inputelement.addeventlistener('compositionend', handleevent); result specifications specification status ui events working draft ...
Element: contextmenu event - Web APIs
Web › API › Element › contextmenu event
in the latter case, the context menu is displayed at the bottom left of the focused element, unless the element is a tree, in which case the context menu is displayed at the bottom left of the current row.
... any right-click event that is not disabled (by calling the event's preventdefault() method) will result in a contextmenu event being fired at the targeted element.
... html <p id="nocontextmenu">the context menu has been disabled on this paragraph.</p> <p>but it has not been disabled on this one.</p> javascript nocontext = document.getelementbyid('nocontextmenu'); nocontext.addeventlistener('contextmenu', e => { e.preventdefault(); }); result specifications specification status comment html living standardthe definition of 'contextmenu' in that specification.
Element.getAttributeNodeNS() - Web APIs
Web › API › Element › getAttributeNodeNS
syntax attributenode = element.getattributenodens(namespace, nodename) attributenode is the node for specified attribute.
... == example == tbd the example needs to be fixed pre> // html: <div id="top" /> t = document.getelementbyid("top"); specialnode = t.getattributenodens( "http://www.mozilla.org/ns/specialspace", "id"); // inode.value = "full-top" </pre notes getattributenodens is more specific than getattributenode in that it allows you to specify attributes that are part of a particular namespace.
... dom methods dealing with element's attributes: not namespace-aware, most commonly used methods namespace-aware variants (dom level 2) dom level 1 methods for dealing with attr nodes directly (seldom used) dom level 2 namespace-aware methods for dealing with attr nodes directly (seldom used) setattribute (dom 1) setattributens setattributenode setattributenodens getattribute (dom 1) getattributens getattributenode getattributenodens hasattribute (dom 2) hasattributens - - removeattribute (dom 1) removeattributens removeattributenode - specifications specification status comment domthe definition of 'getattributenodens()' in that specification.
Element.hasAttributeNS() - Web APIs
Web › API › Element › hasAttributeNS
hasattributens returns a boolean value indicating whether the current element has the specified attribute.
... syntax result = element.hasattributens(namespace,localname) result is the boolean value true or false.
... example // check that the attribute exists before you set a value var d = document.getelementbyid("div1"); if (d.hasattributens( "http://www.mozilla.org/ns/specialspace/", "special-align")) { d.setattribute("align", "center"); } notes dom methods dealing with element's attributes: not namespace-aware, most commonly used methods namespace-aware variants (dom level 2) dom level 1 methods for dealing with attr nodes directly (seldom used) dom level 2 namespace-aware methods for dealing with attr nodes directly (seldom used) setattribute (dom 1) setattributens setattributenode setattributenodens getattribute (dom 1) getattributens getattributenode getattributenode...
Element: mousedown event - Web APIs
Web › API › Element › mousedown event
the mousedown event is fired at an element when a pointing device button is pressed while the pointer is inside the element.
... note: this differs from the click event in that click is fired after a full click action occurs; that is, the mouse button is pressed and released while the pointer remains inside the same element.
... html <h1>drawing with mouse events</h1> <canvas id="mypics" width="560" height="360"></canvas> css canvas { border: 1px solid black; width: 560px; height: 360px; } javascript // when true, moving the mouse draws on the canvas let isdrawing = false; let x = 0; let y = 0; const mypics = document.getelementbyid('mypics'); const context = mypics.getcontext('2d'); // event.offsetx, event.offsety gives the (x,y) offset from the edge of the canvas.
Element: msContentZoom event - Web APIs
Web › API › Element › msContentZoom event
the mscontentzoom event fires when a user zooms the element (changes the scale of the content).
... zoomed elements can expose their zoom level through mscontentzoom (ie.
...the zoom level can be reset with element.mszoomto().
Element.prefix - Web APIs
Web › API › Element › prefix
the element.prefix read-only property returns the namespace prefix of the specified element, or null if no prefix is specified.
... syntax string = element.prefix examples the following logs "x" to the console.
... specifications specification status comment domthe definition of 'element: prefix' in that specification.
Element.scrollBy() - Web APIs
Web › API › Element › scrollBy
the scrollby() method of the element interface scrolls an element by the given amount.
... syntax element.scrollby(x-coord, y-coord); element.scrollby(options) parameters x-coord is the horizontal pixel value that you want to scroll by.
... examples // scroll an element element.scrollby(300, 300); using options: element.scrollby({ top: 100, left: 100, behavior: 'smooth' }); specification specification status comment css object model (cssom) view modulethe definition of 'element.scrollby()' in that specification.
Element: select event - Web APIs
Web › API › Element › select event
bubbles yes cancelable no interface uievent if generated from a user interface, event otherwise event handler property onselect the event is not available for all elements in all languages.
... for example, in html, select events can be dispatched only on form <input type="text"> and <textarea> elements.
... examples selection logger <input value="try selecting some text in this element."> <p id="log"></p> function logselection(event) { const log = document.getelementbyid('log'); const selection = event.target.value.substring(event.target.selectionstart, event.target.selectionend); log.textcontent = `you selected: ${selection}`; } const input = document.queryselector('input'); input.addeventlistener('select', logselection); onselect equivalent you can also set up the event handler using the onselect property: input.onselect = logselection; specifications specification status ui eventsthe definition of 'select' in that specification.
Element: underflow event - Web APIs
Web › API › Element › underflow event
the non-standard underflow event, which is specific to firefox, is fired when an element is no longer overflowed by its content.
... this only works for elements for which overflow is not set to visible.
... <div id="wrapper"> <div id="child"></div> </div> <br/> <label><input type="checkbox" id="toggle" checked/> overflow</label> <style> #wrapper { width: 20px; height: 20px; background: #000; padding: 5px; overflow: hidden; } #child { width: 40px; height: 40px; border: 2px solid grey; background: #ccc; } </style> <script> var wrapper = document.getelementbyid("wrapper"), child = document.getelementbyid("child"), toggle = document.getelementbyid("toggle"); wrapper.addeventlistener("overflow", function( event ) { console.log( event ); }, false); wrapper.addeventlistener("underflow", function( event ) { console.log( event ); }, false); toggle.addeventlistener("change", function( event ) { if ( event.target.c...
HTMLAnchorElement.rel - Web APIs
Web › API › HTMLAnchorElement › rel
the htmlanchorelement.rel property reflects the rel attribute.
... it is a domstring containing a space-separated list of link types indicating the relationship between the resource represented by the <a> element and the current document.
... syntax var relstr = anchorelt.rel; anchorelt.rel = relstr; example var anchors = document.getelementsbytagname("a"); var length = anchors.length; for (var i = 0; i < length; i++) { alert("rel: " + anchors[i].rel); } specifications specification status comment html living standardthe definition of 'rel' in that specification.
HTMLAnchorElement.relList - Web APIs
Web › API › HTMLAnchorElement › relList
the htmlanchorelement.rellist read-only property reflects the rel attribute.
... it is a live domtokenlist containing the set of link types indicating the relationship between the resource represented by the <a> element and the current document.
... syntax var relstr = anchorelt.rellist; example var anchors = document.getelementsbytagname("a"); var length = anchors.length; for (var i = 0; i < length; i++) { var list = anchors[i].rellist; var listlength = list.length; console.log("new anchor node found with", listlength, "link types in rellist."); for (var j = 0; j < listlength; j++) { console.log(list[j]); } } specifications specification status comment html living standardthe definition of 'rellist' in that specification.
HTMLAreaElement.rel - Web APIs
Web › API › HTMLAreaElement › rel
the htmlareaelement.rel property reflects the rel attribute.
... it is a domstring containing a space-separated list of link types indicating the relationship between the resource represented by the <area> element and the current document.
... syntax var relstr = areaelt.rel; areaelt.rel = relstr; example var areas = document.getelementsbytagname("area"); var length = areas.length; for (var i = 0; i < length; i++) { alert("rel: " + areas[i].rel); } specifications specification status comment html living standardthe definition of 'rel' in that specification.
HTMLAreaElement.relList - Web APIs
Web › API › HTMLAreaElement › relList
the htmlareaelement.rellist read-only property reflects the rel attribute.
... it is a live domtokenlist containing the set of link types indicating the relationship between the resource represented by the <area> element and the current document.
... syntax var relstr = areaelt.rellist; example var areas = document.getelementsbytagname("area"); var length = areas.length; for (var i = 0; i < length; i++) { var list = areas[i].rellist; var listlength = list.length; console.log("new area found."); for (var j = 0; j < listlength; j++) { console.log(list[j]); } } specifications specification status comment html living standardthe definition of 'rellist' in that specification.
HTMLButtonElement.labels - Web APIs
Web › API › HTMLButtonElement › labels
the htmlbuttonelement.labels read-only property returns a nodelist of the <label> elements associated with the <button> element.
... syntax var labelelements = button.labels; return value a nodelist containing the <label> elements associated with the <button> element.
... example html <label id="label1" for="test">label 1</label> <button id="test">button</button> <label id="label2" for="test">label 2</label> javascript window.addeventlistener("domcontentloaded", function() { const button = document.getelementbyid("test"); for(var i = 0; i < button.labels.length; i++) { console.log(button.labels[i].textcontent); // "label 1" and "label 2" } }); specifications specification status comment html living standardthe definition of 'labels' in that specification.
HTMLCanvasElement.captureStream() - Web APIs
Web › API › HTMLCanvasElement › captureStream
the htmlcanvaselement capturestream() method returns a mediastream which includes a canvascapturemediastreamtrack containing a real-time video capture of the canvas's contents.
... example // find the canvas element to capture var canvaselt = document.queryselector('canvas'); // get the stream var stream = canvaselt.capturestream(25); // 25 fps // do things to the stream // e.g.
... send it to another computer using an rtcpeerconnection // pc is an rtcpeerconnection created elsewhere pc.addstream(stream); specifications specification status comment media capture from dom elementsthe definition of 'htmlcanvaselement.capturestream()' in that specification.
HTMLContentElement.select - Web APIs
Web › API › HTMLContentElement › select
the htmlcontentelement.select property reflects the select attribute.
... it is a domstring containing a space-separated list of css selectors that select the content to insert in place of the <content> element.
... syntax object.select = "cssselector cssselector ..."; example // select <h1> elements and elements with class="error" mycontentobject.select = "h1 .error"; specifications this feature is no longer defined by any standards.
HTMLDataElement.value - Web APIs
Web › API › HTMLDataElement › value
the value property of the htmldataelement interface returns a domstring reflecting the value html attribute.
... syntax var avalue = htmldataelement.value htmldataelement.value = avalue value a domstring.
... specifications specification status comment html living standardthe definition of 'htmldataelement.value' in that specification.
HTMLDialogElement.returnValue - Web APIs
Web › API › HTMLDialogElement › returnValue
the returnvalue property of the htmldialogelement interface gets or sets the return value for the <dialog>, usually to indicate which button the user pressed to close it.
...tion>brine shrimp</option> <option>red panda</option> <option>spider monkey</option> </select> </label></p> <menu> <button>cancel</button> <button>confirm</button> </menu> </form> </dialog> <menu> <button id="updatedetails">update details</button> </menu> <script> (function() { var updatebutton = document.getelementbyid('updatedetails'); var dialog = document.getelementbyid('favdialog'); dialog.returnvalue = 'favanimal'; function opencheck(dialog) { if (dialog.open) { console.log('dialog open'); } else { console.log('dialog closed'); } } function handleuserinput(returnvalue) { if (returnvalue === 'cancel' || returnvalue == nu...
...m') { // user chose a favorite animal, do something with it } } // “update details” button opens the <dialog> modally updatebutton.addeventlistener('click', function() { dialog.showmodal(); opencheck(dialog); handleuserinput(dialog.returnvalue); }); })(); </script> note: you can find this example on github as htmldialogelement-basic (see it live also).
HTMLDialogElement.show() - Web APIs
Web › API › HTMLDialogElement › show
the show() method of the htmldialogelement interface displays the dialog modelessly, i.e.
...from there you can click the cancel button to close the dialog (via the htmldialogelement.close() method), or submit the form via the submit button.
...ion>red panda</option> <option>spider monkey</option> </select></p> </section> <menu> <button id="cancel" type="reset">cancel</button> <button type="submit">confirm</button> </menu> </form> </dialog> <menu> <button id="updatedetails">update details</button> </menu> <script> (function() { var updatebutton = document.getelementbyid('updatedetails'); var cancelbutton = document.getelementbyid('cancel'); var dialog = document.getelementbyid('favdialog'); dialog.returnvalue = 'favanimal'; function opencheck(dialog) { if(dialog.open) { console.log('dialog open'); } else { console.log('dialog closed'); } } // update button opens a modal dialog ...
HTMLElement.contextMenu - Web APIs
Web › API › HTMLElement › contextMenu
the htmlelement.contextmenu property refers to the context menu assigned to an element using the contextmenu attribute.
... the menu itself is created using the <menu> element.
... syntax var elementcontextmenu = element.contextmenu; example var contextmenu = document.getelementbyid("element").contextmenu; // change the label of the first menu entry contextmenu.firstelementchild.label = "new label"; ...
HTMLElement: gotpointercapture event - Web APIs
Web › API › HTMLElement › gotpointercapture event
the gotpointercapture event is fired when an element captures a pointer using setpointercapture().
... bubbles yes cancelable no interface pointerevent event handler property ongotpointercapture examples this example gets a <p> element and listens for the gotpointercapture event.
... it then calls setpointercapture() on the element on a pointerdown event, which will trigger gotpointercapture.
HTMLFontElement.size - Web APIs
Web › API › HTMLFontElement › size
the obsolete htmlfontelement.size property is a domstring that reflects the size html attribute.
... it contains either an integer number in the range of 1-7 or a relative value to increase/decrease the value of the size attribute of the <basefont> element.
... the format of the string must follow one of the following html microsyntaxes: microsyntax description examples valid size number string integer number in the range of 1-7 6 relative size string +x or -x, where x is the number relative to the value of the size attribute of the <basefont> element (the result should be in the same range of 1-7) +2 -1 syntax sizestring = fontobj.size; fontobj.size = sizestring; examples // assumes there is <font id="f"> element in the html var f = document.getelementbyid("f"); f.size = "6"; specifications the <font> tag is not supported in html5 and as a result neither is <font>.size .
HTMLFormElement.reportValidity() - Web APIs
Web › API › HTMLFormElement › reportValidity
the htmlformelement.reportvalidity() method returns true if the element's child controls satisfy their validation constraints.
... syntax htmlformelement.reportvalidity() return value boolean example document.forms['myform'].addeventlistener('submit', function() { document.forms['myform'].reportvalidity(); }, false); specifications specification status comment html living standardthe definition of 'htmlformelement.reportvalidity()' in that specification.
... living standard html 5.1the definition of 'htmlformelement.reportvalidity()' in that specification.
HTMLHyperlinkElementUtils.toString() - Web APIs
Web › API › HTMLHyperlinkElementUtils › toString
the htmlhyperlinkelementutils.tostring() stringifier method returns a usvstring containing the whole url.
... it is a read-only version of htmlhyperlinkelementutils.href.
... syntax string = object.tostring(); examples // let's imagine an <a id="myanchor" href="https://developer.mozilla.org/docs/htmlhyperlinkelementutils/tostring"> element is in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.tostring(); // returns: 'https://developer.mozilla.org/docs/htmlhyperlinkelementutils/tostring' specifications specification status comment html living standard living standard ...
HTMLIFrameElement.allowPaymentRequest - Web APIs
Web › API › HTMLIFrameElement › allowPaymentRequest
the allowpaymentrequest property of the htmliframeelement interface returns a boolean indicating whether the payment request api may be invoked on a cross-origin iframe.
... syntax var allow = htmliframeelement.allowpaymentrequest value a boolean.
... html living standardthe definition of 'htmliframeelement: allowpaymentrequest' in that specification.
HTMLIFrameElement.contentWindow - Web APIs
Web › API › HTMLIFrameElement › contentWindow
the contentwindow property returns the window object of an htmliframeelement.
... example of contentwindow var x = document.getelementsbytagname("iframe")[0].contentwindow; //x = window.frames[0]; x.document.getelementsbytagname("body")[0].style.backgroundcolor = "blue"; // this would turn the 1st iframe in document blue.
... specifications specification status comment html living standardthe definition of 'htmliframeelement: contentwindow' in that specification.
HTMLIFrameElement.referrerPolicy - Web APIs
Web › API › HTMLIFrameElement › referrerPolicy
the htmliframeelement.referrerpolicy property reflects the html referrerpolicy attribute of the <iframe> element defining which referrer is sent when fetching the resource.
... examples var iframe = document.createelement("iframe"); iframe.src = "/"; iframe.referrerpolicy = "unsafe-url"; var body = document.getelementsbytagname("body")[0]; body.appendchild(iframe); // fetch the image using the complete url as the referrer specifications specification status comment referrer policythe definition of 'referrerpolicy attribute' in that specification.
... html living standardthe definition of 'htmliframeelement: referrerpolicy' in that specification.
HTMLImageElement.height - Web APIs
Web › API › HTMLImageElement › height
the height property of the htmlimageelement interface indicates the height at which the image is drawn, in css pixels if the image is being drawn or rendered to any visual medium such as the screen or a printer; otherwise, it's the natural, pixel density corrected height of the image.
... syntax htmlimageelement.height = newheight; let height = htmlimageelement.height; value an integer value indicating the height of the image.
... specifications specification status comment html living standardthe definition of 'htmlimageelement.height' in that specification.
HTMLImageElement.naturalHeight - Web APIs
Web › API › HTMLImageElement › naturalHeight
the htmlimageelement interface's naturalheight property is a read-only value which returns the intrinsic (natural), density-corrected height of the image in css pixels.
... syntax let naturalheight = htmlimageelement.naturalheight; value an integer value indicating the intrinsic height, in css pixels, of the image.
... result specifications specification status comment html living standardthe definition of 'htmlimageelement.naturalheight' in that specification.
HTMLImageElement.naturalWidth - Web APIs
Web › API › HTMLImageElement › naturalWidth
the htmlimageelement interface's read-only naturalwidth property returns the intrinsic (natural), density-corrected width of the image in css pixels.
... syntax let naturalwidth = htmlimageelement.naturalwidth; value an integer value indicating the intrinsic width of the image, in css pixels.
... result specifications specification status comment html living standardthe definition of 'htmlimageelement.naturalwidth' in that specification.
HTMLImageElement.width - Web APIs
Web › API › HTMLImageElement › width
the width property of the htmlimageelement interface indicates the width at which the image is drawn, in css pixels if the image is being drawn or rendered to any visual medium such as the screen or a printer; otherwise, it's the natural, pixel density corrected width of the image.
... syntax htmlimageelement.width = newwidth; let width = htmlimageelement.width; value an integer value indicating the width of the image.
... specifications specification status comment html living standardthe definition of 'htmlimageelement.width' in that specification.
HTMLInputElement.labels - Web APIs
Web › API › HTMLInputElement › labels
the htmlinputelement.labels read-only property returns a nodelist of the <label> elements associated with the <input> element.
... syntax var labelelements = input.labels; return value a nodelist containing the <label> elements associated with the <input> element.
... example html <label id="label1" for="test">label 1</label> <input id="test"/> <label id="label2" for="test">label 2</label> javascript window.addeventlistener("domcontentloaded", function() { const input = document.getelementbyid("test"); for(var i = 0; i < input.labels.length; i++) { console.log(input.labels[i].textcontent); // "label 1" and "label 2" } }); specifications specification status comment html living standardthe definition of 'labels' in that specification.
HTMLInputElement.mozGetFileNameArray() - Web APIs
Web › API › HTMLInputElement › mozGetFileNameArray
the htmlinputelement.mozgetfilenamearray() method returns an array of the names of the files that were selected by the user on an html input element.
... syntax inputelement.mozgetfilenamearray(alength, afilenames); parameters alength if specified, will receive the number of file names in the returned array.
... example var numfiles = 0; var filearray = {}; inputelement.mozgetfilenamearray(numfiles, filearray); ...
HTMLInputElement.mozSetFileNameArray() - Web APIs
Web › API › HTMLInputElement › mozSetFileNameArray
the htmlinputelement.mozsetfilenamearray() method sets the names of the files that selected on an html input element.
... syntax inputelement.mozsetfilenamearray(afilenames, alength); parameters afilenames is the array of file names to apply to the element.
... example var filearray = {"/foo/bar.txt", "/foo/foosball.txt"}; inputelement.mozsetfilenamearray(filearray, filearray.length); ...
HTMLInputElement.stepUp() - Web APIs
Web › API › HTMLInputElement › stepUp
the htmlinputelement.stepup() method increments the value of a numeric type of <input> element by the value of the step attribute, or the default step value if the step attribute is not explicitly set.
... syntax element.stepup( [ stepincrement ] ); parameters stepincrement the optional stepincrement paremeter is a numeric value.
...by 5: <input type="number" step="5" id="thenumber" min="0" max="400"> </label> </p> <p> <label>enter how many values of step you would like to increment by or leave it blank: <input type="number" step="1" id="incrementer" min="0" max="25"> </label> </p> <input type="button" value="increment" id="thebutton"> javascript /* make the button call the function */ let button = document.getelementbyid('thebutton') button.addeventlistener('click', function() { steponup() }) function steponup() { let input = document.getelementbyid('thenumber') let val = document.getelementbyid('incrementer').value if (val) { /* increment with a parameter */ input.stepup(val) } else { /* or without a parameter.
HTMLInputElement.webkitdirectory - Web APIs
Web › API › HTMLInputElement › webkitdirectory
the htmlinputelement.webkitdirectory is a property that reflects the webkitdirectory html attribute and indicates that the <input> element should let the user select directories instead of files.
... syntax htmlinputelement.webkitdirectory = boolvalue value a boolean; true if the <input> element should allow picking only directories or false if only files should be selectable.
... html content <input type="file" id="filepicker" name="filelist" webkitdirectory multiple /> <ul id="listing"></ul> javascript content document.getelementbyid("filepicker").addeventlistener("change", function(event) { let output = document.getelementbyid("listing"); let files = event.target.files; for (let i=0; i<files.length; i++) { let item = document.createelement("li"); item.innerhtml = files[i].webkitrelativepath; output.appendchild(item); }; }, false); result specifications specification status commen...
HTMLLabelElement.control - Web APIs
Web › API › HTMLLabelElement › control
the read-only htmllabelelement.control property returns a reference to the control (in the form of an object of type htmlelement or one of its derivatives) with which the <label> element is associated, or null if the label isn't associated with a control.
... syntax control = htmllabelelement.control value an htmlelement derived object representing the control with which the <label> is associated, or null if the label stands alone.
... if this property has a value and htmllabelelement.htmlfor has a value, the htmllabelelement.htmlfor property must refer to the same control.
HTMLLabelElement.form - Web APIs
Web › API › HTMLLabelElement › form
the read-only htmllabelelement.form property returns an htmlformelement object which represents the form of which the label's associated control is a part, or null if there is either no associated control, or if that control isn't in a form.
... this property is just a shortcut for htmllabelelement.control.form.
... syntax form = htmllabelelement.form value an htmlformelement which represents the form with which the label's control is associated.
HTMLLinkElement.rel - Web APIs
Web › API › HTMLLinkElement › rel
the htmllinkelement.rel property reflects the rel attribute.
... it is a domstring containing a space-separated list of link types indicating the relationship between the resource represented by the <link> element and the current document.
... syntax var relstr = linkelt.rel; linkelt.rel = relstr; example var links = document.getelementsbytagname('link'); var length = links.length; for (var i = 0; i < length; i++) { alert(links[i]); } specifications specification status comment html living standardthe definition of 'rel' in that specification.
HTMLLinkElement.relList - Web APIs
Web › API › HTMLLinkElement › relList
the htmllinkelement.rellist read-only property reflects the rel attribute.
... it is a live domtokenlist containing the set of link types indicating the relationship between the resource represented by the <link> element and the current document.
... syntax var relstr = linkelt.rellist; example var links = document.getelementsbytagname("link"); var length = links.length; for (var i = 0; i < length; i++) { var list = links[i].rellist; var listlength = list.length; console.log("new link found."); for (var j = 0; j < listlength; j++) { console.log(list[j]); } } specifications specification status comment html living standardthe definition of 'rellist' in that specification.
HTMLMediaElement.buffered - Web APIs
Web › API › HTMLMediaElement › buffered
the htmlmediaelement.buffered read-only property returns a new timeranges object that indicates the ranges of the media source that the browser has buffered (if any) at the moment the buffered property is accessed.
... example var obj = document.createelement('video'); console.log(obj.buffered); // timeranges { length: 0 } specifications specification status comment html living standardthe definition of 'htmlmediaelement.buffered' in that specification.
... living standard no change from html5 html5the definition of 'htmlmediaelement.buffered' in that specification.
HTMLMediaElement.canPlayType() - Web APIs
Web › API › HTMLMediaElement › canPlayType
the htmlmediaelement method canplaytype() reports how likely it is that the current browser will be able to play media of a given mime type.
... example var obj = document.createelement('video'); console.log(obj.canplaytype('video/mp4')); // "maybe" specifications specification status comment html living standardthe definition of 'canplaytype' in that specification.
... living standard html5the definition of 'htmlmediaelement.canplaytype' in that specification.
HTMLMediaElement.controller - Web APIs
Web › API › HTMLMediaElement › controller
the htmlmediaelement.controller property represents the media controller assigned to the element.
... value a mediacontroller object or null if no media controller is assigned to the element.
... specifications specification status comment html5the definition of 'htmlmediaelement.controller' in that specification.
HTMLMediaElement.controls - Web APIs
Web › API › HTMLMediaElement › controls
the htmlmediaelement.controls property reflects the controls html attribute, which controls whether user interface controls for playing the media item will be displayed.
... example var obj = document.createelement('video'); obj.controls = true; specifications specification status comment html living standardthe definition of 'htmlmediaelement.controls' in that specification.
... living standard no change from html5 html5the definition of 'htmlmediaelement.controls' in that specification.
HTMLMediaElement.crossOrigin - Web APIs
Web › API › HTMLMediaElement › crossOrigin
the htmlmediaelement.crossorigin property is the cors setting for this image element.
... specifications specification status comment html living standardthe definition of 'htmlmediaelement.crossorigin' in that specification.
... living standard no change from html5 html5the definition of 'htmlmediaelement.crossorigin' in that specification.
HTMLMediaElement.defaultMuted - Web APIs
Web › API › HTMLMediaElement › defaultMuted
the htmlmediaelement.defaultmuted property reflects the muted html attribute, which indicates whether the media element's audio output should be muted by default.
... example var videoele = document.createelement('video'); videoele.defaultmuted = true; console.log(videoele.outerhtml); // <video muted=""></video> specifications specification status comment html living standardthe definition of 'htmlmediaelement.defaultmuted' in that specification.
... living standard no change from html5 html5the definition of 'htmlmediaelement.defaultmuted' in that specification.
HTMLMediaElement.defaultPlaybackRate - Web APIs
Web › API › HTMLMediaElement › defaultPlaybackRate
the htmlmediaelement.defaultplaybackrate property indicates the default playback rate for the media.
... example var obj = document.createelement('video'); console.log(obj.defaultplaybackrate); // 1 specifications specification status comment html living standardthe definition of 'htmlmediaelement.defaultplaybackrate' in that specification.
... living standard no change from html5 html5the definition of 'htmlmediaelement.defaultplaybackrate' in that specification.
HTMLMediaElement.disableRemotePlayback - Web APIs
Web › API › HTMLMediaElement › disableRemotePlayback
the htmlmediaelement.disableremoteplayback property determines whether the media element is allowed to have a remote playback ui.
... syntax var remoteplaybackdisabled ​= element.disableremoteplayback; value a boolean indicating whether the media element may have a remote playback ui.
... (false means "not disabled", which means "enabled") example var obj = document.createelement('audio'); obj.disableremoteplayback = true; specifications specification status comment remote playback apithe definition of 'disableremoteplayback' in that specification.
HTMLMediaElement.loop - Web APIs
Web › API › HTMLMediaElement › loop
the htmlmediaelement.loop property reflects the loop html attribute, which controls whether the media element should start over when it reaches the end.
... example var obj = document.createelement('video'); obj.loop = true; // true specifications specification status comment html living standardthe definition of 'htmlmediaelement.loop' in that specification.
... living standard html5the definition of 'htmlmediaelement.loop' in that specification.
HTMLMediaElement.mediaGroup - Web APIs
Web › API › HTMLMediaElement › mediaGroup
the htmlmediaelement.mediagroup property reflects the mediagroup html attribute, which indicates the name of the group of elements it belongs to.
... a group of media elements shares a common controller.
... specifications specification status comment html5the definition of 'htmlmediaelement.mediagroup' in that specification.
HTMLMediaElement.msInsertAudioEffect() - Web APIs
Web › API › HTMLMediaElement › msInsertAudioEffect
the htmlmediaelement.msinsertaudioeffect() method inserts the specified audio effect into the media pipeline.
... syntax htmlmediaelement.msinsertaudioeffect(activatableclassid: domstring, effectrequired: boolean, config); parameters activatableclassid a domstring defining the audio effects class.
... see also htmlmediaelement microsoft api extensions ...
HTMLMediaElement.muted - Web APIs
Web › API › HTMLMediaElement › muted
the htmlmediaelement.muted indicates whether the media element muted.
... example var obj = document.createelement('video'); console.log(obj.muted); // false specifications specification status comment html living standardthe definition of 'htmlmediaelement.muted' in that specification.
... living standard html5the definition of 'htmlmediaelement.muted' in that specification.
HTMLMediaElement: pause event - Web APIs
Web › API › HTMLMediaElement › pause event
the pause event is sent when a request to pause an activity is handled and the activity has entered its paused state, most commonly after the media has been paused through a call to the element's pause() method.
... the event is sent once the pause() method returns and after the media element's paused property has been changed to true.
... general info bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onpause specification html5 media examples these examples add an event listener for the htmlmediaelement's pause event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement.paused - Web APIs
Web › API › HTMLMediaElement › paused
the read-only htmlmediaelement.paused property tells whether the media element is paused.
... example var obj = document.createelement('video'); console.log(obj.paused); // true specifications specification status comment html living standardthe definition of 'htmlmediaelement.paused' in that specification.
... living standard html5the definition of 'htmlmediaelement.paused' in that specification.
HTMLMediaElement.seekToNextFrame() - Web APIs
Web › API › HTMLMediaElement › seekToNextFrame
the htmlmediaelement.seektonextframe() method asynchronously advances the the current play position to the next frame in the media.
... if there is no video on the media element, or the media isn't seekable, nothing happens.
... syntax var seekcompletepromise = htmlmediaelement.seektonextframe(); htmlmediaelement.seektonextframe(); return value a promise which is fulfilled once the seek operation has completed.
HTMLMediaElement.setSinkId() - Web APIs
Web › API › HTMLMediaElement › setSinkId
the htmlmediaelement.setsinkid() method sets the id of the audio device to use for output and returns a promise.
... syntax htmlmediaelement.setsinkid(sinkid).then(function() { ...
... exceptions exception explanation domexception no permission to use the requested device examples const devices = await navigator.mediadevices.enumeratedevices(); const audiodevices = devices.filter(device => device.kind === 'audiooutput'); const audio = document.createelement('audio'); await audio.setsinkid(audiodevices[0].deviceid); console.log('audio is being played on ' + audio.sinkid); specifications specification status comment audio output devices apithe definition of 'sinkid' in that specification.
HTMLMediaElement.volume - Web APIs
Web › API › HTMLMediaElement › volume
the htmlmediaelement.volume property sets the volume at which the media will be played.
... example var obj = document.createelement('audio'); console.log(obj.volume); // 1 obj.volume = 0.75; specifications specification status comment html living standardthe definition of 'htmlmediaelement.volume' in that specification.
... living standard html5the definition of 'htmlmediaelement.volume' in that specification.
HTMLMeterElement.labels - Web APIs
Web › API › HTMLMeterElement › labels
the htmlmeterelement.labels read-only property returns a nodelist of the <label> elements associated with the <meter> element.
... syntax var labelelements = meter.labels; return value a nodelist containing the <label> elements associated with the <meter> element.
... example html <label id="label1" for="test">label 1</label> <meter id="test" min="0" max="100" value="70">70</meter> <label id="label2" for="test">label 2</label> javascript window.addeventlistener("domcontentloaded", function() { const meter = document.getelementbyid("test"); for(var i = 0; i < meter.labels.length; i++) { console.log(meter.labels[i].textcontent); // "label 1" and "label 2" } }); specifications specification status comment html living standardthe definition of 'labels' in that specification.
HTMLObjectElement.typeMustMatch - Web APIs
Web › API › HTMLObjectElement › typeMustMatch
the htmlobjectelement.typemustmatch property is a boolean that reflects the typemustmatch attribute of the <object> element.
... it indicates if the resource linked by it must match the mime type given by htmlobjectelement.type in order for this resource to be used.
... syntax var mustmatch = obj.typemustmatch; obj.typemustmatch = mustmatch; example html <object id="obj" data="move.swf" type="application/x-shockwave-flash" typemustmatch></object> javascript let obj = document.getelementbyid('obj'); console.log(obj.typemustmatch); specifications specification status comment html5the definition of 'htmlobjectelement' in that specification.
HTMLObjectElement.willValidate - Web APIs
Web › API › HTMLObjectElement › willValidate
the willvalidate read-only property of the htmlobjectelement interface returns a boolean that indicates whether the element is a candidate for constraint validation.
... always false for htmlobjectelement objects.
... syntax var boolean = htmlobjectelement.willvalidate; value a boolean.
HTMLOutputElement.labels - Web APIs
Web › API › HTMLOutputElement › labels
the htmloutputelement.labels read-only property returns a nodelist of the <label> elements associated with the <output> element.
... syntax var labelelements = output.labels; return value a nodelist containing the <label> elements associated with the <output> element.
... example html <label id="label1" for="test">label 1</label> <output id="test">output</output> <label id="label2" for="test">label 2</label> javascript window.addeventlistener("domcontentloaded", function() { const output = document.getelementbyid("test"); for(var i = 0; i < output.labels.length; i++) { console.log(output.labels[i].textcontent); // "label 1" and "label 2" } }); specifications specification status comment html living standardthe definition of 'labels' in that specification.
HTMLProgressElement.labels - Web APIs
Web › API › HTMLProgressElement › labels
the htmlprogresselement.labels read-only property returns a nodelist of the <label> elements associated with the <progress> element.
... syntax var labelelements = progress.labels; return value a nodelist containing the <label> elements associated with the <progress> element.
... example html <label id="label1" for="test">label 1</label> <progress id="test" value="70" max="100">70%</progress> <label id="label2" for="test">label 2</label> javascript window.addeventlistener("domcontentloaded", function() { const progress = document.getelementbyid("test"); for(var i = 0; i < progress.labels.length; i++) { console.log(progress.labels[i].textcontent); // "label 1" and "label 2" } }); specifications specification status comment html living standardthe definition of 'labels' in that specification.
HTMLSelectElement.labels - Web APIs
Web › API › HTMLSelectElement › labels
the htmlselectelement.labels read-only property returns a nodelist of the <label> elements associated with the <select> element.
... syntax var labelelements = select.labels; return value a nodelist containing the <label> elements associated with the <select> element.
... example html <label id="label1" for="test">label 1</label> <select id="test"> <option value="1">option 1</option> <option value="2">option 2</option> </select> <label id="label2" for="test">label 2</label> javascript window.addeventlistener("domcontentloaded", function() { const select = document.getelementbyid("test"); for(var i = 0; i < select.labels.length; i++) { console.log(select.labels[i].textcontent); // "label 1" and "label 2" } }); specifications specification status comment html living standardthe definition of 'labels' in that specification.
HTMLSelectElement.options - Web APIs
Web › API › HTMLSelectElement › options
the htmlselectelement.options read-only property returns a htmloptionscollection of the <option> elements contained by the <select> element.
... syntax var options = select.options; return value a htmloptionscollection containing the <option> elements contained by the <select> element.
... example html <label for="test">label</label> <select id="test"> <option value="1">option 1</option> <option value="2">option 2</option> </select> javascript window.addeventlistener("domcontentloaded", function() { const select = document.getelementbyid("test"); for(var i = 0; i < select.options.length; i++) { console.log(select.options[i].label); // "option 1" and "option 2" } }); specifications specification status comment html living standardthe definition of 'options' in that specification.
HTMLTableElement.bgColor - Web APIs
Web › API › HTMLTableElement › bgColor
the htmltableelement.bgcolor property represents the background color of the table.
...the css background-color property should be used instead by modifying the element's style object or using a style rule.
... example // set table background colour to lightblue var t = document.getelementbyid('tablea'); t.bgcolor = 'lightblue'; specification dom level 2 html:htmltableelement .bgcolor ...
HTMLTableElement.border - Web APIs
Web › API › HTMLTableElement › border
the htmltableelement.border property represents the border width of the <table> element.
... syntax htmltableelement.border = border; var border = htmltableelement.border; border is a string representing the width of the border in pixels.
... example // set the width of a table border to 2 pixels var t = document.getelementbyid('tablea'); t.border = '2'; specification w3c dom 2 html specification htmltableelement .border.
HTMLTableElement.cellPadding - Web APIs
Web › API › HTMLTableElement › cellPadding
the htmltableelement.cellpadding property represents the padding around the individual cells of the table.
... syntax htmltableelement.cellpadding = padding; var padding = htmltableelement.cellpadding; padding is either a number of pixels (e.g.
... example // set cell padding to 10 pixels let t = document.getelementbyid('tablea'); t.cellpadding = '10'; specification w3c dom 2 html specification htmltableelement .cellpadding.
HTMLTableElement.cellSpacing - Web APIs
Web › API › HTMLTableElement › cellSpacing
while you should instead use the css border-spacing property, the obsolete htmltableelement interface's cellspacing property represents the spacing around the individual <th> and <td> elements representing a table's cells.
... syntax htmltableelement.cellspacing = spacing; var spacing = htmltableelement.cellspacing; value a domstring which is either a number of pixels (such as "10") or a percentage value (like "10%").
... var t = document.getelementbyid('tablea'); t.cellspacing = "10"; specification w3c dom 2 html specification htmltableelement .cellspacing.
HTMLTableElement.createTFoot() - Web APIs
Web › API › HTMLTableElement › createTFoot
the htmltableelement.createtfoot() method returns the <tfoot> element associated with a given <table>.
...the footer does not need to be added separately as would be the case if document.createelement() had been used to create the new <tfoot> element.
... syntax htmltablesectionelement = table.createtfoot(); return value htmltablesectionelement example let myfoot = mytable.createtfoot(); // now this should be true: myfoot == mytable.tfoot specifications specification status comment html living standardthe definition of 'htmltableelement: createtfoot' in that specification.
HTMLTableElement.createTHead() - Web APIs
Web › API › HTMLTableElement › createTHead
the htmltableelement.createthead() method returns the <thead> element associated with a given <table>.
...the header does not need to be added separately as would be the case if document.createelement() had been used to create the new <thead> element.
... syntax htmltablesectionelement = table.createthead(); return value htmltablesectionelement example let myhead = mytable.createthead(); // now this should be true: myhead == mytable.thead specifications specification status comment html living standardthe definition of 'htmltableelement: createthead' in that specification.
HTMLTableElement.deleteRow() - Web APIs
Web › API › HTMLTableElement › deleteRow
the htmltableelement.deleterow() method removes a specific row (<tr>) from a given <table>.
... syntax htmltableelement.deleterow(index) parameters index index is an integer representing the row that should be deleted.
...l 1.2</td><td>cell 1.3</td></tr> <tr><td>cell 2.1</td><td>cell 2.2</td><td>cell 2.3</td></tr> <tr><td>cell 3.1</td><td>cell 3.2</td><td>cell 3.3</td></tr> </table> javascript let table = document.queryselector('table'); // delete second row table.deleterow(1); result specifications specification status comment html living standardthe definition of 'htmltableelement: deleterow' in that specification.
HTMLTableElement.deleteTFoot() - Web APIs
Web › API › HTMLTableElement › deleteTFoot
the htmltableelement.deletetfoot() method removes the <tfoot> element from a given <table>.
... syntax htmltableelement.deletetfoot(); example this example uses javascript to delete a table's footer.
... html <table> <thead><th>name</th><th>score</th></thead> <tr><td>bob</td><td>541</td></tr> <tr><td>jim</td><td>225</td></tr> <tfoot><th>average</th><td>383</td></tfoot> </table> javascript let table = document.queryselector('table'); table.deletetfoot(); result specifications specification status comment html living standardthe definition of 'htmltableelement: deletetfoot' in that specification.
HTMLTableElement.deleteTHead() - Web APIs
Web › API › HTMLTableElement › deleteTHead
the htmltableelement.deletethead() removes the <thead> element from a given <table>.
... syntax htmltableelement.deletethead(); example this example uses javascript to delete a table's header.
... html <table> <thead><th>name</th><th>occupation</th></thead> <tr><td>bob</td><td>plumber</td></tr> <tr><td>jim</td><td>roofer</td></tr> </table> javascript let table = document.queryselector('table'); table.deletethead(); result specifications specification status comment html living standardthe definition of 'htmltableelement: deletethead' in that specification.
HTMLTableElement.frame - Web APIs
Web › API › HTMLTableElement › frame
the htmltableelement interface's frame property is a string that indicates which of the table's exterior borders should be drawn.
... syntax htmltableelement.frame = framesides; var framesides = htmltableelement.frame; parameters framesides is a string whose value is one of the following values: void no sides.
... "above" top side "below" bottom side "hsides" top and bottom only "vsides" right and left sides only "lhs" left-hand side only "rhs" right-hand side only "box" all four sides "border" all four sides example // set the frame of tablea to 'border' var t = document.getelementbyid('tablea'); t.frame = "border"; t.border = "2px"; specification w3c dom 2 html specification ...
HTMLTableElement.rows - Web APIs
Web › API › HTMLTableElement › rows
the read-only htmltableelement property rows returns a live htmlcollection of all the rows in the table, including the rows contained within any <thead>, <tfoot>, and <tbody> elements.
... syntax htmlcollectionobject = table.rows; value an htmlcollection providing a live-updating list of the htmltablerowelement objects representing all of the <tr> elements contained in the table.
... specifications specification status comment html living standardthe definition of 'htmltableelement: rows' in that specification.
HTMLTemplateElement.content - Web APIs
Web › API › HTMLTemplateElement › content
the htmltemplateelement.content property returns a <template> element's template contents (a documentfragment).
... syntax var documentfragment = templateelement.content example var templateelement = document.queryselector("#foo"); var documentfragment = templateelement.content.clonenode(true); specifications specification status comment html living standardthe definition of 'htmltemplateelement interface' in that specification.
... living standard html5the definition of 'htmltemplateelement interface' in that specification.
HTMLTextAreaElement.labels - Web APIs
Web › API › HTMLTextAreaElement › labels
the htmltextareaelement.labels read-only property returns a nodelist of the <label> elements associated with the <textarea> element.
... syntax var labelelements = textarea.labels; return value a nodelist containing the <label> elements associated with the <textarea> element.
... example html <label id="label1" for="test">label 1</label> <textarea id="test">some text</textarea> <label id="label2" for="test">label 2</label> javascript window.addeventlistener("domcontentloaded", function() { const textarea = document.getelementbyid("test"); for(var i = 0; i < textarea.labels.length; i++) { console.log(textarea.labels[i].textcontent); // "label 1" and "label 2" } }); specifications specification status comment html living standardthe definition of 'labels' in that specification.
HTMLVideoElement.msFrameStep() - Web APIs
Web › API › HTMLVideoElement › msFrameStep
the htmlvideoelement.msframestep() method steps the video by one frame forward or one frame backward.
... syntax htmlvideoelement.msframestep(forward); parameters forward a boolean which if set to true steps the video forward by one frame, if false steps the video backwards by one frame.
... see also htmlmediaelement microsoft api extensions ...
HTMLVideoElement.msHorizontalMirror - Web APIs
Web › API › HTMLVideoElement › msHorizontalMirror
mshorizontalmirror is a read/write property which gets or sets whether a video element is flipped horizontally in the display.
... syntax htmlvideoelement.mshorizontalmirror: boolean; value boolean value set to true flips the video playback horizontally.
... example var myvideo = document.getelementbyid("videotag1"); myvideo.mshorizontalmirror = true; myvideo.play(); example #2: var flip = document.queryselector('#flip'); flip.addeventlistener('click', function() { video.mshorizontalmirror = true; }); see also htmlvideoelement microsoft api extensions ...
HTMLVideoElement.msInsertVideoEffect() - Web APIs
Web › API › HTMLVideoElement › msInsertVideoEffect
the htmlmediaelement.msinsertvideoeffect() method inserts the specified video effect into the media pipeline.
... syntax str = htmlmediaelement.msinsertvideoeffect(activatableclassid: domstring, effectrequired: boolean, config); parameters activatableclassid a domstring defining the video effects class.
... example var ovideo1 = document.getelementbyid("video1"); ovideo1.msinsertvideoeffect("windows.media.videoeffects.videostabilization", true, null); see also htmlvideoelement microsoft api extensions ...
OES_element_index_uint - Web APIs
Web › API › OES element index uint
the oes_element_index_uint extension is part of the webgl api and adds support for gl.unsigned_int types to webglrenderingcontext.drawelements().
... extended methods this extension extends webglrenderingcontext.drawelements(): the type parameter now accepts gl.unsigned_int.
... examples var ext = gl.getextension('oes_element_index_uint'); gl.drawelements(gl.points, 8, gl.unsigned_int, 0); specifications specification status comment oes_element_index_uintthe definition of 'oes_element_index_uint' in that specification.
SVGAnimationElement: endEvent event - Web APIs
Web › API › SVGAnimationElement › endEvent event
the endevent event of the svganimationelement interface is fired when at the active end of the animation is reached.
...scheduled or interactive) timeline play, as well as in the case that the element was ended with a dom method.
...nimation</button> <ul> </ul> ul { height: 100px; border: 1px solid #ddd; overflow-y: scroll; padding: 10px 30px; } let svgelem = document.queryselector('svg'); let animateelem = document.queryselector('animatemotion'); let list = document.queryselector('ul'); let btn = document.queryselector('button'); animateelem.addeventlistener('beginevent', () => { let listitem = document.createelement('li'); listitem.textcontent = 'beginevent fired'; list.appendchild(listitem); }) animateelem.addeventlistener('endevent', () => { let listitem = document.createelement('li'); listitem.textcontent = 'endevent fired'; list.appendchild(listitem); }) animateelem.addeventlistener('repeatevent', (e) => { let listitem = document.createelement('li'); let msg = 'repeatevent fired'; if(e.
SVGAnimationElement: repeatEvent event - Web APIs
Web › API › SVGAnimationElement › repeatEvent event
the repeatevent event of the svganimationelement interface is fired when the element's local timeline repeats.
... it will be fired each time the element repeats, after the first iteration.
...dur="5s" repeatcount="indefinite" /> </circle> </svg> <hr> <ul> </ul> ul { height: 100px; border: 1px solid #ddd; overflow-y: scroll; padding: 10px 30px; } let svgelem = document.queryselector('svg'); let animateelem = document.queryselector('animatemotion'); let list = document.queryselector('ul'); animateelem.addeventlistener('beginevent', () => { let listitem = document.createelement('li'); listitem.textcontent = 'beginevent fired'; list.appendchild(listitem); }) animateelem.addeventlistener('repeatevent', (e) => { let listitem = document.createelement('li'); let msg = 'repeatevent fired'; if(e.detail) { msg += '; repeat number: ' + e.detail; } listitem.textcontent = msg; list.appendchild(listitem); }) event handler property equivalent note that you ...
SVGPathElement.pathLength - Web APIs
Web › API › SVGPathElement › pathLength
the svgpathelement.pathlength property reflects the pathlength attribute and returns the total length of the path, in user units.
... note: in svg 2 this property was moved to the svggeometryelement interface, from which the svgpathelement inherits it.
... syntax var pathlength = someelement.pathlength; specifications specification status comment scalable vector graphics (svg) 1.1 (second edition)the definition of 'svgpathelement.pathlength' in that specification.
TransitionEvent.pseudoElement - Web APIs
Web › API › TransitionEvent › pseudoElement
the transitionevent.pseudoelement read-only property is a domstring, starting with '::', containing the name of the pseudo-element the animation runs on.
... if the transition doesn't run on a pseudo-element but on the element, an empty string: ''.
... syntax name = transitionevent.pseudoelement specifications specification status comment css transitionsthe definition of 'transitionevent.pseudoelement' in that specification.
Window.frameElement - Web APIs
Web › API › Window › frameElement
the window.frameelement property returns the element (such as <iframe> or <object>) in which the window is embedded.
... syntax const frameel = window.frameelement value the element which the window is embedded into.
... example const frameel = window.frameelement; // if we're embedded, change the containing element's url to 'http://mozilla.org/' if (frameel) { frameel.src = 'http://mozilla.org/'; } specifications specification status comment html living standardthe definition of 'window.frameelement' in that specification.
<figcaption>: The Figure Caption element - HTML: Hypertext Markup Language
Web › HTML › Element › figcaption
the html <figcaption> or figure caption element represents a caption or legend describing the rest of the contents of its parent <figure> element.
... permitted parents a <figure> element; the <figcaption> element must be its first or last child.
... implicit aria role no corresponding role permitted aria roles group, none, presentation dom interface htmlelement attributes this element only includes the global attributes.
getElementsByAttribute - Archive of obsolete content
Archive › Mozilla › XUL › Method › getElementsByAttribute
« xul reference home getelementsbyattribute( attrib, value ) return type: dom nodelist returns a nodelist of all the child elements of the element that have the attribute given by the first argument set to the value given by the second argument.
... note that this method is only available on xul elements; it is not part of the w3c dom.
labelElement - Archive of obsolete content
Archive › Mozilla › XUL › Property › labelElement
« xul reference labelelement type: label element the label element associated with the control.
... this is set when a label has a control attribute pointing to this element.
Element - Archive of obsolete content
Archive › RSS › Module › Slash › Element
rss slash module elements note: in the list of elements below the slash xml namespace prefix is used (since it is a popular choice).
... a b c <slash:comments> (rss slash module comments element) d <slash:department> (rss slash module department element) e f g h <slash:hit_parade> (rss slash hit parade department element) i j k l m n o p q r s <slash:section> (rss slash module section element) t u v w x y z ...
Element - Archive of obsolete content
Archive › RSS › Module › Well-Formed Web › Element
rss well-formed web module elements note: in the list of elements below the wfw xml namespace prefix is used (since it is a popular choice).
... a b c <wfw:comment> (rss well-formed web module comment element) <wfw:commentrss> (rss well-formed web module comment rss element) d e f g h i j k l m n o p q r s t u v w x y z ...
Element - Archive of obsolete content
Archive › RSS elements
rss elements a <author> (rss author element) b c <category> (rss category element) <channel> (rss channel element) <cloud> (rss cloud element) <comments> (rss comments element) <copyright> (rss copyright element) d <day> (rss day element) <description> (rss description element) <docs> (rss docs element) e <enclosure> (rss enclosure element) f g <generator> (rss generator element) <guid> (rss guid element) h <height> (rss height element) <hour> (rss hour element) i <image> (rss image element) <item> (rss item element) j k l <language> (rss language element) <lastbuilddate> (rss last build date element) <link> (rss link element) m <managingeditor> (rss managing editor element) n <name> (rss name element) o p <pubdate> (rss publi...
...shed date element) q r <rating> (rss rating element) <rss> (rss's root "rss" element) s <skipdays> (rss skip days element) <skiphours> (rss skip hours element) <source> (rss source element) t <textinput> (rss text input element) <title> (rss title element) <ttl> (rss ttl element) u <url> (rss url element) v w <webmaster> (rss web master element) <width> (rss width element) x y z ...
XForms Secret Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Secret
type restrictions the secret element can be bound to a node containing simple content of any data type except xsd:base64binary, xsd:hexbinray or any data type derived from these.
... representations the xforms secret element is represented by a password field.
XForms Textarea Element - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Textarea
type restrictions the textarea element can be bound to a node of type xsd:string or any type derived from it.
... representations the xforms textarea element is represented by a multiline text field (xhtml/xul).
HTMLIFrameElement.addNextPaintListener()
Mozilla › Gecko › Chrome › API › Browser API › addNextPaintListener
the addnextpaintlistener() method of the htmliframeelement is used to define a handler to listen for the next mozafterpaint event coming from the browser <iframe>.
... syntax instanceofhtmliframeelement.addnextpaintlistener(listener); returns void.
HTMLIFrameElement.clearMatch()
Mozilla › Gecko › Chrome › API › Browser API › clearMatch
the clearmatch() method of the htmliframeelement clears any content highlighted by findall() or findnext().
... syntax instanceofhtmliframeelement.clearmatch(); returns void.
HTMLIFrameElement.download()
Mozilla › Gecko › Chrome › API › Browser API › download
the download() method of the htmliframeelement interface downloads a specified url, storing it at /sdcard/download.
... syntax var instanceofdomrequest = instanceofhtmliframeelement.download(url, options); returns a domrequest for handling the download request.
HTMLIFrameElement.executeScript()
Mozilla › Gecko › Chrome › API › Browser API › executeScript
the executescript() method of the htmliframeelement interface allows a specified script to be executed against a page loaded in the browser <iframe>.
... syntax var mydomrequest = instanceofhtmliframeelement.executescript(script, options); return value a domrequest object that returns an onsuccess handler if the script is successfully executed against the loaded content, or an onerror handler if not.
HTMLIFrameElement.findAll()
Mozilla › Gecko › Chrome › API › Browser API › findAll
the findall() method of the htmliframeelement searches for a string in a browser <iframe>'s text content; if found, the first instance of the string relative to the caret position will be highlighted.
... syntax instanceofhtmliframeelement.findall(searchstring, casesensitivity); returns void.
HTMLIFrameElement.findNext()
Mozilla › Gecko › Chrome › API › Browser API › findNext
the findnext() method of the htmliframeelement highlights the next or previous instance of a search result after a findall() search has been carried out.
... syntax instanceofhtmliframeelement.findnext(direction); return value void.
HTMLIFrameElement.getActive()
Mozilla › Gecko › Chrome › API › Browser API › getActive
the getactive() method of the htmliframeelement indicates whether the current browser <iframe> is the currently active frame.
... syntax var amiactive = instanceofhtmliframeelement.getactive(); returns a boolean indicating whether the current browser <iframe> is the currently active frame (true) or not (false.) parameters none.
HTMLIFrameElement.getCanGoBack()
Mozilla › Gecko › Chrome › API › Browser API › getCanGoBack
the getcangoback() method of the htmliframeelement interface is used to indicate whether it's possible to go back in the navigation history of the browser <iframe>.
... syntax instanceofhtmliframeelement.getcangoback() .then(function(result) { ...
HTMLIFrameElement.getCanGoForward()
Mozilla › Gecko › Chrome › API › Browser API › getCanGoForward
the getcangoforward() method of the htmliframeelement is used to indicate whether it's possible to go forward in the navigation history of the browser <iframe>.
... syntax instanceofhtmliframeelement.getcangoforward() .then(function(result) { ...
HTMLIFrameElement.getContentDimensions()
Mozilla › Gecko › Chrome › API › Browser API › getContentDimensions
the getcontentdimensions() method of the htmliframeelement interface retrieves the x and y dimensions of the content window.
... syntax var instanceofdomrequest = instanceofhtmliframeelement.getcontentdimensions(); returns a domrequest for handling the dimensions request.
HTMLIFrameElement.getManifest()
Mozilla › Gecko › Chrome › API › Browser API › getManifest
the getmanifest() method of the htmliframeelement interface retrieves the manifest of an app loaded in the browser <iframe> and returns it as json.
... syntax instanceofhtmliframeelement.getmanifest().then(function(json) { ...
HTMLIFrameElement.getMuted()
Mozilla › Gecko › Chrome › API › Browser API › getMuted
the getmuted() method of the htmliframeelement indicates whether the browser <iframe> is currently muted.
... syntax there are two versions of this method, a callback version: var request = instanceofhtmliframeelement.getmuted(); and a promise version: instanceofhtmliframeelement.getmuted().then(function(muted) { ...
HTMLIFrameElement.getStructuredData()
Mozilla › Gecko › Chrome › API › Browser API › getStructuredData
the getstructureddata() method of the htmliframeelement interface retrieves any structured microdata (and hcard and hcalendar microformat data) contained in the html loaded in the browser <iframe> and returns it as json.
... syntax var instanceofdomrequest = instanceofhtmliframeelement.getstructureddata(); returns a domrequest to handle the getstructureddata() request's success and error cases.
HTMLIFrameElement.getVisible()
Mozilla › Gecko › Chrome › API › Browser API › getVisible
the getvisible() method of the htmliframeelement is used to request the current visible state of the browser <iframe>.
... syntax instanceofdomrequest = instanceofhtmliframeelement.getvisible(); returns a domrequest object to handle the getvisible() request's success and error cases.
HTMLIFrameElement.getVolume()
Mozilla › Gecko › Chrome › API › Browser API › getVolume
the getvolume() method of the htmliframeelement gets the current volume of the browser <iframe>.
... syntax there are two versions of this method, a callback version: var request = instanceofhtmliframeelement.getvolume(); and a promise version: instanceofhtmliframeelement.getvolume().then(function(volume) { ...
HTMLIFrameElement.goBack()
Mozilla › Gecko › Chrome › API › Browser API › goBack
the goback() method of the htmliframeelement interface is used to navigate backwards in the browser <iframe>'s history.
... syntax instanceofhtmliframeelement.goback(); returns void.
HTMLIFrameElement.goForward()
Mozilla › Gecko › Chrome › API › Browser API › goForward
the goforward() method of the htmliframeelement is used to navigate forward in the browser <iframe>'s history.
... syntax instanceofhtmliframeelement.goforward(); returns void.
HTMLIFrameElement.mute()
Mozilla › Gecko › Chrome › API › Browser API › mute
the mute() method of the htmliframeelement mute any audio playing in the browser <iframe>.
... syntax instanceofhtmliframeelement.mute(); returns void.
HTMLIFrameElement.purgeHistory()
Mozilla › Gecko › Chrome › API › Browser API › purgeHistory
the purgehistory() method of the htmliframeelement interface is used to clear the browsing history associated with the browser <iframe>.
... syntax there is a domrequest version and a promise version: var mydomrequest = instanceofhtmliframeelement.purgehistory(); instanceofhtmliframeelement.purgehistory().then(function() { ...
HTMLIFrameElement.reload()
Mozilla › Gecko › Chrome › API › Browser API › reload
the reload() method of the htmliframeelement interface is used to reload the content of the <iframe>.
... syntax instanceofhtmliframeelement.reload(hardreload); returns void.
HTMLIframeElement.removeNextPaintListener()
Mozilla › Gecko › Chrome › API › Browser API › removeNextPaintListener
the removenextpaintlistener() method of the htmliframeelement interface is used to remove a handler previously set with the addnextpaintlistener method.
... syntax instanceofhtmliframeelement.removenextpaintlistener(listener); returns void.
HTMLIFrameElement.sendMouseEvent()
Mozilla › Gecko › Chrome › API › Browser API › sendMouseEvent
the sendmouseevent() method of the htmliframeelement interface allows you to fake a mouse event and send it to the browser <iframe>'s content.
... syntax instanceofhtmliframeelement.sendmouseevent(type, x, y, button, clickcount, modifiers); returns void.
HTMLIFrameElement.sendTouchEvent()
Mozilla › Gecko › Chrome › API › Browser API › sendTouchEvent
the sendtouchevent() method of the htmliframeelement allows you to fake a touch event and send it to the browser <iframe>'s content.
... syntax instanceofhtmliframeelement.sendtouchevent(type, x, y, rx, ry, rotationangles, forces, count, modifiers); returns void.
HTMLIFrameElement.setActive()
Mozilla › Gecko › Chrome › API › Browser API › setActive
the setactive() method of the htmliframeelement sets the current <iframe> as the active frame, which has an effect on how it is prioritized by the process manager.
... syntax instanceofhtmliframeelement.setactive(boolean); returns void.
HTMLIFrameElement.setVisible()
Mozilla › Gecko › Chrome › API › Browser API › setVisible
the setvisible() method of the htmliframeelement is used to change the visibility state of the browser <iframe>.
... syntax instanceofhtmliframeelement.setvisible(visible); returns void.
HTMLIFrameElement.setVolume()
Mozilla › Gecko › Chrome › API › Browser API › setVolume
the setvolume() method of the htmliframeelement sets the current volume of the browser <iframe>.
... syntax instanceofhtmliframeelement.setvolume(number); returns void.
HTMLIFrameElement.stop()
Mozilla › Gecko › Chrome › API › Browser API › stop
the stop() method of the htmliframeelement interface is used to stop loading the content of the <iframe>.
... syntax instanceofhtmliframeelement.stop(); returns void.
HTMLIFrameElement.unmute()
Mozilla › Gecko › Chrome › API › Browser API › unmute
the unmute() method of the htmliframeelement unmutes any audio playing in the browser <iframe>.
... syntax instanceofhtmliframeelement.unmute(); returns void.
HTMLIFrameElement.zoom()
Mozilla › Gecko › Chrome › API › Browser API › zoom
the zoom() method of the htmliframeelement interface changes the zoom factor of the browser <iframe>'s content.
... syntax var instanceofdomrequest = instanceofhtmliframeelement.zoom(zoomfactor); returns void.
nsIDOMHTMLMediaElement
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMHTMLMediaElement
dom/interfaces/html/nsidomhtmlmediaelement.idlscriptable the basis for the nsidomhtmlaudioelement and nsidomhtmlvideoelement interfaces, which in turn implement the <audio> and <video> html5 elements.
... 1.0 67 introduced gecko 1.9.1 inherits from: nsidomhtmlelement last changed in gecko 1.1 the nsidomhtmlmediaelement interface implements the dom htmlmediaelement interface.
nsIDOMXULSelectControlElement
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMXULSelectControlElement
inherits from: nsidomxulcontrolelement last changed in gecko 1.9 (firefox 3) method overview nsidomxulselectcontrolitemelement appenditem(in domstring label, in domstring value); long getindexofitem(in nsidomxulselectcontrolitemelement item); nsidomxulselectcontrolitemelement getitematindex(in long index); nsidomxulselectcontrolitemelement insertitemat(in long index, in domstring label, in domstring value); nsidomxulselectcontrolitemelement removeitemat(in long index); attributes attribute type description itemcount unsigned long read only.
... selectedindex long selecteditem nsidomxulselectcontrolitemelement value domstring methods appenditem() nsidomxulselectcontrolitemelement appenditem( in domstring label, in domstring value ); parameters label value return value getindexofitem() long getindexofitem( in nsidomxulselectcontrolitemelement item ); parameters item return value getitematindex() nsidomxulselectcontrolitemelement getitematindex( in long index ); parameters index return value insertitemat() nsidomxulselectcontrolitemelement insertitemat( in long index, in domstring label, in domstring value ); parameters index label value return value removeitemat() nsidomxulselectcontrolitemelement removeitemat( in long index ); parameters index return value ...
nsIFeedElementBase
Mozilla › Tech › XPCOM › Reference › Interface › nsIFeedElementBase
toolkit/components/feeds/public/nsifeedelementbase.idlscriptable this interface is a base interface from which several of the other feed access interfaces derive.
... 1.0 66 introduced gecko 1.8 inherits from: nsisupports last changed in gecko 1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) attributes attribute type description attributes nsisaxattributes all the attributes found on the element.
nsIXFormsModelElement
Mozilla › Tech › XPCOM › Reference › Interface › nsIXFormsModelElement
extensions/xforms/nsixformsmodelelement.idlscriptable defines scriptable methods for manipulating instance data and updating computed and displayed values.
...ts from: nsisupports last changed in gecko 1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) method overview nsidomdocument getinstancedocument(in domstring instanceid); void rebuild(); void recalculate(); void refresh(); void revalidate(); methods getinstancedocument() nsidomdocument getinstancedocument( in domstring instanceid ); parameters instanceid the id of the instance element to be returned.
CSSPseudoElement.type - Web APIs
Web › API › CSSPseudoElement › type
the type read-only property of the csspseudoelement interface returns the type of the pseudo-element as a string, represented in the form of a css selector.
... syntax var typeofpseudoelement = csspseudoelement.type; value a cssomstring containing one of the following values: "::before" "::after" "::marker" examples the example below demonstrates the relationship between csspseudoelement.type and element.pseudo(): const myelement = document.queryselector('q'); const myselector = '::after'; const csspseudoelement = myelement.pseudo(myselector); const typeofpseudoelement = csspseudoelement.type; console.log(myselector === typeofpseudoelement); // outputs true specifications specification status comment css pseudo-elements level 4the definition of 'type' in that specification.
Element: DOMMouseScroll event - Web APIs
Web › API › Element › DOMMouseScroll event
note: if the platform's native mouse wheel events only provide scroll distance by pixels, or if the speed can be customized by the user, the value is computed using the line height of the nearest scrollable ancestor element of the event's target.
... if that element's font size is smaller than mousewheel.min_line_scroll_amount, that preference's value is used as the line height.
Element: MSManipulationStateChanged event - Web APIs
Web › API › Element › MSManipulationStateChanged event
msmanipulationstatechanged fires when the state of an element being manipulated has changed (ie.
... whenever you start or finish panning or zooming an element).
Element: MozMousePixelScroll event - Web APIs
Web › API › Element › MozMousePixelScroll
the firefox-only, non-standard, and obsolete mozmousepixelscroll event is fired at an element asynchronously when a mouse wheel or similar device is operated.
... if the platform's native mouse wheel events indicate the scroll distance in terms of lines or pages, the value of detail is computed using that value and the line height or page width/height of the nearest ancestor scrollable element that contains the target element.
Element.accessKey - Web APIs
Web › API › Element › accessKey
the element.accesskey property sets the keystroke which a user can press to jump to a given element.
... the element.accesskey property is seldom used because of its multiple conflicts with already present key bindings in browsers.
Element: auxclick event - Web APIs
Web › API › Element › auxclick event
the auxclick event is fired at an element when a non-primary pointing device button (any mouse button other than the primary—usually leftmost—button) has been pressed and released both within the same element.
... when listening for auxclick events originating on elements that do not support input or navigation, you will often want to explicitly prevent other default actions mapped to the down action of the middle mouse button.
Element: blur event - Web APIs
Web › API › Element › blur event
the blur event fires when an element has lost focus.
... html <form id="form"> <input type="text" placeholder="text input"> <input type="password" placeholder="password"> </form> javascript const form = document.getelementbyid('form'); form.addeventlistener('focus', (event) => { event.target.style.background = 'pink'; }, true); form.addeventlistener('blur', (event) => { event.target.style.background = ''; }, true); result specifications specification status comment ui events working draft added info that this event is composed.
Element.currentStyle - Web APIs
Web › API › Element › currentStyle
element.currentstyle is a proprietary property which is similar to the standardized window.getcomputedstyle() method.
... * http://creativecommons.org/publicdomain/zero/1.0/ */ if (!("currentstyle" in element.prototype)) { object.defineproperty(element.prototype, "currentstyle", { get: function() { return window.getcomputedstyle(this); } }); } specification not part of any specification.
Element: error event - Web APIs
Web › API › Element › error event
the error event is fired on an element object when a resource failed to load, or can't be used.
... bubbles no cancelable no interface event or uievent event handler property onerror the event object is a uievent instance if it was generated from a user interface element, or an event instance otherwise.
Element: focus event - Web APIs
Web › API › Element › focus event
the focus event fires when an element has received focus.
... html <form id="form"> <input type="text" placeholder="text input"> <input type="password" placeholder="password"> </form> javascript const form = document.getelementbyid('form'); form.addeventlistener('focus', (event) => { event.target.style.background = 'pink'; }, true); form.addeventlistener('blur', (event) => { event.target.style.background = ''; }, true); result specifications specification status comment ui events working draft added info that this event is composed.
Element: focusin event - Web APIs
Web › API › Element › focusin event
the focusin event fires when an element is about to receive focus.
... bubbles yes cancelable no interface focusevent event handler property onfocusin sync / async sync composed yes examples live example html <form id="form"> <input type="text" placeholder="text input"> <input type="password" placeholder="password"> </form> javascript const form = document.getelementbyid('form'); form.addeventlistener('focusin', (event) => { event.target.style.background = 'pink'; }); form.addeventlistener('focusout', (event) => { event.target.style.background = ''; }); result specifications specification status comment ui events working draft added info that this event is composed.
Element: focusout event - Web APIs
Web › API › Element › focusout event
the focusout event fires when an element is about to lose focus.
... bubbles yes cancelable no interface focusevent event handler property onfocusout sync / async sync composed yes examples live example html <form id="form"> <input type="text" placeholder="text input"> <input type="password" placeholder="password"> </form> javascript const form = document.getelementbyid('form'); form.addeventlistener('focusin', (event) => { event.target.style.background = 'pink'; }); form.addeventlistener('focusout', (event) => { event.target.style.background = ''; }); result specifications specification status comment ui events working draft added info that this event is composed.
Element: keydown event - Web APIs
Web › API › Element › keydown event
ething like this (229 is a special value set for a keycode relating to an event that has been processed by an ime): eventtarget.addeventlistener("keydown", event => { if (event.iscomposing || event.keycode === 229) { return; } // do something }); examples addeventlistener keydown example this example logs the keyboardevent.code value whenever you press down a key inside the <input> element.
... <input placeholder="click here, then press down a key." size="40"> <p id="log"></p> const input = document.queryselector('input'); const log = document.getelementbyid('log'); input.addeventlistener('keydown', logkey); function logkey(e) { log.textcontent += ` ${e.code}`; } onkeydown equivalent input.onkeydown = logkey; specifications specification status ui events working draft ...
Element: keypress event - Web APIs
Web › API › Element › keypress event
interface keyboardevent bubbles yes cancelable yes default action varies: keypress event; launch text composition system; blur and focus events; domactivate event; other event examples addeventlistener keypress example this example logs the keyboardevent.code value whenever you press a key after focussing the <input> element.
... <div> <label for="sample">focus the input and type something:</label> <input type="text" name="text" id="sample"> </div> <p id="log"></p> const log = document.getelementbyid('log'); const input = document.queryselector('input'); input.addeventlistener('keypress', logkey); function logkey(e) { log.textcontent += ` ${e.code}`; } onkeypress equivalent input.onkeypress = logkey; specifications specification status ui events working draft ...
Element: keyup event - Web APIs
Web › API › Element › keyup event
do something like this (229 is a special value set for a keycode relating to an event that has been processed by an ime): eventtarget.addeventlistener("keyup", event => { if (event.iscomposing || event.keycode === 229) { return; } // do something }); examples addeventlistener keyup example this example logs the keyboardevent.code value whenever you release a key inside the <input> element.
... <input placeholder="click here, then press and release a key." size="40"> <p id="log"></p> const input = document.queryselector('input'); const log = document.getelementbyid('log'); input.addeventlistener('keyup', logkey); function logkey(e) { log.textcontent += ` ${e.code}`; } onkeyup equivalent input.onkeyup = logkey; specifications specification status ui events working draft ...
Element: mousemove event - Web APIs
Web › API › Element › mousemove event
the mousemove event is fired at an element when a pointing device (usually a mouse) is moved while the cursor's hotspot is inside it.
... html <h1>drawing with mouse events</h1> <canvas id="mypics" width="560" height="360"></canvas> css canvas { border: 1px solid black; width: 560px; height: 360px; } javascript // when true, moving the mouse draws on the canvas let isdrawing = false; let x = 0; let y = 0; const mypics = document.getelementbyid('mypics'); const context = mypics.getcontext('2d'); // event.offsetx, event.offsety gives the (x,y) offset from the edge of the canvas.
Element: mouseover event - Web APIs
Web › API › Element › mouseover event
the mouseover event is fired at an element when a pointing device (such as a mouse or trackpad) is used to move the cursor onto the element or one of its child elements.
... html <ul id="test"> <li>item 1</li> <li>item 2</li> <li>item 3</li> </ul> javascript let test = document.getelementbyid("test"); // this handler will be executed only once when the cursor // moves over the unordered list test.addeventlistener("mouseenter", function( event ) { // highlight the mouseenter target event.target.style.color = "purple"; // reset the color after a short delay settimeout(function() { event.target.style.color = ""; }, 500); }, false); // this handler will be executed every time the cursor // is moved over a di...
Element: mouseup event - Web APIs
Web › API › Element › mouseup event
the mouseup event is fired at an element when a button on a pointing device (such as a mouse or trackpad) is released while the pointer is located inside it.
... html <h1>drawing with mouse events</h1> <canvas id="mypics" width="560" height="360"></canvas> css canvas { border: 1px solid black; width: 560px; height: 360px; } javascript // when true, moving the mouse draws on the canvas let isdrawing = false; let x = 0; let y = 0; const mypics = document.getelementbyid('mypics'); const context = mypics.getcontext('2d'); // event.offsetx, event.offsety gives the (x,y) offset from the edge of the canvas.
Element.onfullscreenerror - Web APIs
Web › API › Element › onfullscreenerror
the element interface's onfullscreenerror property is an event handler for the fullscreenerror event which is sent to the element when an error occurs while attempting to transition into or out of full-screen mode.
... syntax targetelement.onfullscreenerror = fullscreenerrorhandler; value an error handler for the fullscreenerror event.
Element: overflow event - Web APIs
Web › API › Element › overflow event
the overflow event is fired when an element has been overflowed by its content or has been rendered for the first time in this state (only works for elements styled with overflow != visible).
... <div id="wrapper"> <div id="child"></div> </div> <br/> <label><input type="checkbox" id="toggle" checked/> overflow</label> <style> #wrapper { width: 20px; height: 20px; background: #000; padding: 5px; overflow: hidden; } #child { width: 40px; height: 40px; border: 2px solid grey; background: #ccc; } </style> <script> var wrapper = document.getelementbyid("wrapper"), child = document.getelementbyid("child"), toggle = document.getelementbyid("toggle"); wrapper.addeventlistener("overflow", function( event ) { console.log( event ); }, false); wrapper.addeventlistener("underflow", function( event ) { console.log( event ); }, false); toggle.addeventlistener("change", function( event ) { if ( event.target.c...
Element.requestPointerLock() - Web APIs
Web › API › Element › requestPointerLock
the element.requestpointerlock() method lets you asynchronously ask for the pointer to be locked on the given element.
... syntax instanceofelement.requestpointerlock(); specifications specification status comment pointer lockthe definition of 'requestpointerlock()' in that specification.
Element.scrollLeftMax - Web APIs
Web › API › Element › scrollLeftMax
the element.scrollleftmax read-only property returns a number representing the maximum left scroll offset possible for the element.
... syntax var pxl = element.scrollleftmax; specifications this property is not part of any specification.
Element.setAttributeNS() - Web APIs
Web › API › Element › setAttributeNS
syntax element.setattributens(namespace, name, value) namespace is a string specifying the namespace of the attribute.
... example let d = document.getelementbyid('d1'); d.setattributens('http://www.mozilla.org/ns/specialspace', 'spec:align', 'center'); notes dom methods dealing with element's attributes: not namespace-aware, most commonly used methods namespace-aware variants (dom level 2) dom level 1 methods for dealing with attr nodes directly (seldom used) dom level 2 namespace-aware methods for dealing with attr nodes directly (seldom used) setattribute (dom 1) setattributens setattributenode setattributenodens getattribute (dom 1) getattributens getattributenode getattributenodens hasattribute (dom ...
Element: show event - Web APIs
Web › API › Element › show event
the show event is fired when a contextmenu event was fired on/bubbled to an element that has a contextmenu attribute.
... bubbles no cancelable no interface event event handler property onshow examples <div contextmenu="test"></div> <menu type="context" id="test"> <menuitem label="alert" onclick="alert('the alert label has been clicked')" /> </menu> <script> document.getelementbyid("test").addeventlistener("show", function(e){ alert("the context menu will be displayed"); }, false); </script> specifications specification status html5the definition of 'show event' in that specification.
ElementTraversal - Web APIs
Web › API › ElementTraversal
the elementtraversal interface used to define methods that allowed access from one node to another in the document tree.
... living standard splitted the elementtraversal interface in parentnode and childnode element traversal specificationthe definition of 'elementtraversal' in that specification.
Event.srcElement - Web APIs
Web › API › Event › srcElement
initially implemented in internet explorer, event.srcelement is a now-standard alias (defined in the dom standard but flagged as "historical") for the event.target property.
... specifications specification status comment domthe definition of 'event.srcelement' in that specification.
HTMLAnchorElement.referrerPolicy - Web APIs
Web › API › HTMLAnchorElement › referrerPolicy
the htmlanchorelement.referrerpolicy property reflect the html referrerpolicy attribute of the <a> element defining which referrer is sent when fetching the resource.
... examples var elt = document.createelement("a"); var linktext = document.createtextnode("my link"); elt.appendchild(linktext); elt.href = "https://developer.mozilla.org/"; elt.referrerpolicy = "no-referrer"; var div = document.getelementbyid("divaround"); div.appendchild(elt); // when clicked, the link will not send a referrer header.
HTMLAreaElement.referrerPolicy - Web APIs
Web › API › HTMLAreaElement › referrerPolicy
the htmlareaelement.referrerpolicy property reflect the html referrerpolicy attribute of the <area> element defining which referrer is sent when fetching the resource.
... examples <img usemap="#maparound" width="100" height="100" src="/img/logo@2x.png" /> <map id="mymap" name="maparound" />> var elt = document.createelement("area"); elt.href = "/img2.png"; elt.shape = "rect"; elt.referrerpolicy = "no-referrer"; elt.coords = "0,0,100,100"; var map = document.getelementbyid("mymap"); map.appendchild(elt); // when clicked, the area's link will not send a referrer header.
HTMLCanvasElement.mozFetchAsStream() - Web APIs
Web › API › HTMLCanvasElement › mozFetchAsStream
the htmlcanvaselement.mozfetchasstream() internal method used to create a new input stream that, when ready, would provide the contents of the canvas as image data.
...also uses netutil.jsm var canvas = document.getelementbyid('canvas'); var d = canvas.width; ctx = canvas.getcontext('2d'); ctx.beginpath(); ctx.moveto(d / 2, 0); ctx.lineto(d, d); ctx.lineto(0, d); ctx.closepath(); ctx.fillstyle = 'yellow'; ctx.fill(); var netutilcallback = function() { return function(result) { if (!components.issuccesscode(result)) { alert('failed to create icon'); } else { alert('succesfully...
HTMLDetailsElement: toggle event - Web APIs
Web › API › HTMLDetailsElement › toggle event
the toggle event fires when the open/closed state of a <details> element is toggled.
... bubbles no cancelable no interface event event handler property none default action toggles the open state of the <details> element.
HTMLElement: animationcancel event - Web APIs
Web › API › HTMLElement › animationcancel event
bubbles yes cancelable no interface animationevent event handler property onanimationcancel examples this code gets an element that's currently being animated and adds a listener to the animationcancel event.
... it then sets the element's display property to none, which will trigger the animationcancel event.
HTMLElement: animationend event - Web APIs
Web › API › HTMLElement › animationend event
if the animation aborts before reaching completion, such as if the element is removed from the dom or the animation is removed from the element, the animationend event is not fired.
... bubbles yes cancelable no interface animationevent event handler property onanimationend examples this example gets an element that's being animated and listens for the animationend event: const animated = document.queryselector('.animated'); animated.addeventlistener('animationend', () => { console.log('animation ended'); }); the same, but using the onanimationend event handler property: const animated = document.queryselector('.animated'); animated.onanimationend = () => { console.log('animation ended'); }; live example html <div class="animation-example"> <div class="container"> <p class="animation">you chose a cold night to visit our planet.</p> </div> <button class="activate" type="button">activate anim...
HTMLElement.forceSpellCheck() - Web APIs
Web › API › HTMLElement › forceSpellCheck
the forcespellcheck() method of the htmlelement interface forces a spelling and grammar check on html elements, even if the user has not focused on the elements.
... syntax element.forcespellcheck() ...
HTMLElement.oncopy - Web APIs
Web › API › HTMLElement › oncopy
the oncopy property of the htmlelement interface is an eventhandler that processes copy events.
... html <h3>play with this text area:</h3> <textarea id="editor" rows="3">try copying and pasting text into this field!</textarea> <h3>log:</h3> <p id="log"></p> javascript const log = document.getelementbyid('log'); function logcopy(event) { log.innertext = 'copy blocked!\n' + log.innertext; event.preventdefault(); } function logpaste(event) { log.innertext = 'paste blocked!\n' + log.innertext; event.preventdefault(); } const editor = document.getelementbyid('editor'); editor.oncopy = logcopy; editor.onpaste = logpaste; result specification whatwg standard ...
HTMLElement.oncut - Web APIs
Web › API › HTMLElement › oncut
the htmlelement.oncut property of the htmlelement interface is an eventhandler that processes cut events.
... html <h3>play with this text area:</h3> <textarea id="editor" rows="3">try copying and cutting the text in this field!</textarea> <h3>log:</h3> <p id="log"></p> javascript function logcopy(event) { log.innertext = 'copied!\n' + log.innertext; } function preventcut(event) { event.preventdefault(); log.innertext = 'cut blocked!\n' + log.innertext; } const editor = document.getelementbyid('editor'); const log = document.getelementbyid('log'); editor.oncopy = logcopy; editor.oncut = preventcut; result specification whatwg standard ...
HTMLElement.onpaste - Web APIs
Web › API › HTMLElement › onpaste
the htmlelement.onpaste property of the htmlelement interface is an eventhandler that processes paste events.
... html <h3>play with this text area:</h3> <textarea id="editor" rows="3">try copying and pasting text into this field!</textarea> <h3>log:</h3> <p id="log"></p> javascript function logcopy(event) { log.innertext = 'copied!\n' + log.innertext; } function logpaste(event) { log.innertext = 'pasted!\n' + log.innertext; } const editor = document.getelementbyid('editor'); const log = document.getelementbyid('log'); editor.oncopy = logcopy; editor.onpaste = logpaste; result specification whatwg standard ...
HTMLElement: pointerenter event - Web APIs
Web › API › HTMLElement › pointerenter event
the pointerenter event fires when a pointing device is moved into the hit test boundaries of an element or one of its descendants, including as a result of a pointerdown event from a device that does not support hover (see pointerdown).
... bubbles no cancelable no interface pointerevent event handler property onpointerenter examples using addeventlistener(): const para = document.queryselector('p'); para.addeventlistener('pointerenter', (event) => { console.log('pointer entered element'); }); using the onpointerenter event handler property: const para = document.queryselector('p'); para.onpointerenter = (event) => { console.log('pointer entered element'); }; specifications specification status pointer events obsolete ...
HTMLElement: pointerleave event - Web APIs
Web › API › HTMLElement › pointerleave event
the pointerleave event is fired when a pointing device is moved out of the hit test boundaries of an element.
... bubbles no cancelable no interface pointerevent event handler property onpointerleave examples using addeventlistener(): const para = document.queryselector('p'); para.addeventlistener('pointerleave', (event) => { console.log('pointer left element'); }); using the onpointerleave event handler property: const para = document.queryselector('p'); para.onpointerleave = (event) => { console.log('pointer left element'); }; specifications specification status pointer events obsolete ...
HTMLElement.title - Web APIs
Web › API › HTMLElement › title
the htmlelement.title property represents the title of the element: the text usually displayed in a 'tooltip' popup when the mouse is over the node.
... syntax var str = element.title; element.title = str; example const link = document.createelement('a'); link.innertext = 'grapes'; link.href = 'https://en.wikipedia.org/wiki/grape'; link.title = 'wikipedia page on grapes'; specifications specification status comment html living standardthe definition of 'title' in that specification.
HTMLElement: transitioncancel event - Web APIs
Web › API › HTMLElement › transitioncancel event
bubbles yes cancelable no interface transitionevent event handler property globaleventhandlers.ontransitioncancel examples this code gets an element that has a transition defined and adds a listener to the transitioncancel event: const transition = document.queryselector('.transition'); transition.addeventlistener('transitioncancel', () => { console.log('transition canceled'); }); the same, but using the ontransitioncancel property instead of addeventlistener(): const transition = document.queryselector('.transition'); transition.ontransitioncancel = () => { console.log('transition canc...
...eled'); }; live example in the following example, we have a simple <div> element, styled with a transition that includes a delay: <div class="transition"></div> <div class="message"></div> .transition { width: 100px; height: 100px; background: rgba(255,0,0,1); transition-property: transform background; transition-duration: 2s; transition-delay: 2s; } .transition:hover { transform: rotate(90deg); background: rgba(255,0,0,0); } to this, we'll add some javascript to indicate that the transitionstart, transitionrun, transitioncancel and transitionend events fire.
HTMLElement: transitionend event - Web APIs
Web › API › HTMLElement › transitionend event
examples this code gets an element that has a transition defined and adds a listener to the transitionend event: const transition = document.queryselector('.transition'); transition.addeventlistener('transitionend', () => { console.log('transition ended'); }); the same, but using the ontransitionend: const transition = document.queryselector('.transition'); transition.ontransitionend = () => { console.log('transition ende...
...d'); }; live example in the following example, we have a simple <div> element, styled with a transition that includes a delay: <div class="transition">hover over me</div> <div class="message"></div> .transition { width: 100px; height: 100px; background: rgba(255,0,0,1); transition-property: transform background; transition-duration: 2s; transition-delay: 1s; } .transition:hover { transform: rotate(90deg); background: rgba(255,0,0,0); } to this, we'll add some javascript to indicate that the transitionstart, transitionrun, transitioncancel and transitionend events fire.
HTMLFontElement.color - Web APIs
Web › API › HTMLFontElement › color
the obsolete htmlfontelement.color property is a domstring that reflects the color html attribute, containing either a named color or a color specified in the hexadecimal #rrggbb format.
...ription examples valid name color string nameofcolor (case insensitive) green green green valid hex color string in rgb format: #rrggbb #008000 rgb using decimal values rgb(x,x,x) (x in 0-255 range) rgb(0,128,0) syntax colorstring = fontobj.color; fontobj.color = colorstring; examples // assumes there is <font id="f"> element in the html var f = document.getelementbyid("f"); f.color = "green"; specifications the <font> tag is not supported in html5 and as a result neither is <font>.color.
HTMLFontElement.face - Web APIs
Web › API › HTMLFontElement › face
the obsolete htmlfontelement.face property is a domstring that reflects the face html attribute, containing a comma-separated list of one or more font names.
... the format of the string must follow one of the following html microsyntax: microsyntax description examples list of one or more valid font family names a list of font names, that have to be present on the local system courier,verdana syntax facestring = fontobj.face; fontobj.face = facestring; examples // assumes there is <font id="f"> element in the html var f = document.getelementbyid("f"); f.face = "arial"; specifications the <font> tag is not supported in html5 and as a result neither is <font>.face .
HTMLFormElement.acceptCharset - Web APIs
Web › API › HTMLFormElement › acceptCharset
the htmlformelement.acceptcharset property represents a list of the supported character encodings for the given <form> element.
... syntax var string = form.acceptcharset; form.acceptcharset = string; example inputs = document.forms['myform'].acceptcharset; specifications specification status comment html living standardthe definition of 'htmlformelement: acceptcharset' in that specification.
HTMLFormElement.action - Web APIs
Web › API › HTMLFormElement › action
the htmlformelement.action property represents the action of the <form> element.
... syntax var string = form.action; form.action = string; example form.action = '/cgi-bin/publish'; specifications specification status comment html living standardthe definition of 'htmlformelement: action' in that specification.
HTMLFormElement.method - Web APIs
Web › API › HTMLFormElement › method
the htmlformelement.method property represents the http method used to submit the <form>.
... syntax var string = form.method; form.method = string; example document.forms['myform'].method = 'post'; const formelement = document.createelement("form"); // create a form document.body.appendchild(formelement); console.log(formelement.method); // 'get' specifications specification status comment html living standardthe definition of 'htmlformelement: method' in that specification.
HTMLFormElement.reset() - Web APIs
Web › API › HTMLFormElement › reset
the htmlformelement.reset() method restores a form element's default values.
... syntax htmlformelement.reset() example document.getelementbyid('myform').reset(); specifications specification status comment html living standardthe definition of 'htmlformelement: reset' in that specification.
HTMLFormElement: submit event - Web APIs
Web › API › HTMLFormElement › submit event
bubbles yes (although specified as a simple event that doesn't bubble) cancelable yes interface submitevent event handler property globaleventhandlers.onsubmit note that the submit event fires on the <form> element itself, and not on any <button> or <input type="submit"> inside it.
...time stamp: ${event.timestamp}`; event.preventdefault(); } const form = document.getelementbyid('form'); const log = document.getelementbyid('log'); form.addeventlistener('submit', logsubmit); result specifications specification status comment html living standardthe definition of 'submit' in that specification.
HTMLFormElement.target - Web APIs
Web › API › HTMLFormElement › target
the target property of the htmlformelement interface represents the target of the form's action (i.e., the frame in which to render its output).
... syntax string = htmlformelement.target htmlformelement.target = string example myform.target = document.frames[1].name; specifications specification status comment html living standardthe definition of 'htmlformelement: target' in that specification.
HTMLHyperlinkElementUtils.hash - Web APIs
Web › API › HTMLHyperlinkElementUtils › hash
the htmlhyperlinkelementutils.hash property returns a usvstring containing a '#' followed by the fragment identifier of the url.
... syntax string = object.hash; object.hash = string; examples <a id="myanchor" href="/docs/htmlhyperlinkelementutils.href#examples">examples</a> <script> var anchor = document.getelementbyid("myanchor"); console.log(anchor.hash); // returns '#examples' </script> specifications specification status comment html living standardthe definition of 'htmlhyperlinkelementutils.hash' in that specification.
HTMLHyperlinkElementUtils.host - Web APIs
Web › API › HTMLHyperlinkElementUtils › host
the htmlhyperlinkelementutils.host property is a usvstring containing the host, that is the hostname, and then, if the port of the url is nonempty, a ':', and the port of the url.
... syntax string = object.host; object.host = string; examples var anchor = document.createelement("a"); anchor.href = "https://developer.mozilla.org/htmlhyperlinkelementutils.host" anchor.host == "developer.mozilla.org" anchor.href = "https://developer.mozilla.org:443/htmlhyperlinkelementutils.host" anchor.host == "developer.mozilla.org" // the port number is not included because 443 is the scheme's default port anchor.href = "https://developer.mozilla.org:4097/htmlhyperlinkelementutils.host" anchor.host == "developer.mozilla.org:4097" specifications specification status comment html living standardthe definition of 'htmlhyperlinkelementutils.host' in that specification.
HTMLHyperlinkElementUtils.hostname - Web APIs
Web › API › HTMLHyperlinkElementUtils › hostname
the htmlhyperlinkelementutils.hostname property is a usvstring containing the domain of the url.
... syntax string = object.hostname; object.hostname = string; examples // let's an <a id="myanchor" href="https://developer.mozilla.org/docs/htmlhyperlinkelementutils.hostname"> element be in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.hostname; // returns:'developer.mozilla.org' specifications specification status comment html living standardthe definition of 'htmlhyperlinkelementutils.hostname' in that specification.
HTMLHyperlinkElementUtils.href - Web APIs
Web › API › HTMLHyperlinkElementUtils › href
the htmlhyperlinkelementutils.href property is a stringifier that returns a usvstring containing the whole url, and allows the href to be updated.
... syntax string = object.href; object.href = string; examples // lets imagine an <a id="myanchor" href="https://developer.mozilla.org/htmlhyperlinkelementutils/href"> element is in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.href; // returns: 'https://developer.mozilla.org/htmlhyperlinkelementutils/href' specifications specification status comment html living standardthe definition of 'htmlhyperlinkelementutils.href' in that specification.
HTMLHyperlinkElementUtils.origin - Web APIs
Web › API › HTMLHyperlinkElementUtils › origin
the htmlhyperlinkelementutils.origin read-only property is a usvstring containing the unicode serialization of the origin of the represented url; that is: for url using the http or https, the scheme followed by '://', followed by the domain, followed by ':', followed by the port (the default port, 80 and 443 respectively, if explicitely specified); for url using file: scheme, the value is browser dependant; for url using the blob: scheme, the origin of the url following blob:.
... syntax string = object.origin; examples // on this page, returns the origin var result = window.location.origin; // returns:'https://developer.mozilla.org' specifications specification status comment html living standardthe definition of 'htmlhyperlinkelementutils.origin' in that specification.
HTMLHyperlinkElementUtils.password - Web APIs
Web › API › HTMLHyperlinkElementUtils › password
the htmlhyperlinkelementutils.password property is a usvstring containing the password specified before the domain name.
... syntax string = object.password; object.password = string; examples // let's <a id="myanchor" href="https://anonymous:flabada@developer.mozilla.org/docs/htmlhyperlinkelementutils.username"> be in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.password; // returns:'flabada' specifications specification status comment html living standardthe definition of 'htmlhyperlinkelementutils.password' in that specification.
HTMLHyperlinkElementUtils.pathname - Web APIs
Web › API › HTMLHyperlinkElementUtils › pathname
the htmlhyperlinkelementutils.pathname property is a usvstring containing an initial '/' followed by the path of the url (or the empty string if there is no path).
... syntax string = object.pathname; object.pathname = string; examples // let's an <a id="myanchor" href="https://developer.mozilla.org/docs/htmlhyperlinkelementutils.pathname"> element be in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.pathname; // returns:'/docs/htmlhyperlinkelementutils.pathname' specifications specification status comment html living standardthe definition of 'htmlhyperlinkelementutils.pathname' in that specification.
HTMLHyperlinkElementUtils.port - Web APIs
Web › API › HTMLHyperlinkElementUtils › port
the htmlhyperlinkelementutils.port property is a usvstring containing the port number of the url.
... syntax string = object.port; object.port = string; examples // let's an <a id="myanchor" href="https://developer.mozilla.org:443/docs/htmlhyperlinkelementutils.port"> element be in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.port; // returns:'443' specifications specification status comment html living standardthe definition of 'htmlhyperlinkelementutils.port' in that specification.
HTMLHyperlinkElementUtils.protocol - Web APIs
Web › API › HTMLHyperlinkElementUtils › protocol
the htmlhyperlinkelementutils.protocol property is a usvstring representing the protocol scheme of the url, including the final ':'.
... syntax string = object.protocol; object.protocol = string; examples // let's an <a id="myanchor" href="https://developer.mozilla.org/htmlhyperlinkelementutils.protocol"> element be in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.protocol; // returns:'https:' specifications specification status comment html living standardthe definition of 'htmlhyperlinkelementutils.protocol' in that specification.
HTMLHyperlinkElementUtils.search - Web APIs
Web › API › HTMLHyperlinkElementUtils › search
the htmlhyperlinkelementutils.search property is a search string, also called a query string, that is usvstring containing a '?' followed by the parameters of the url.
... syntax string = object.search; object.search = string; examples // let an <a id="myanchor" href="https://developer.mozilla.org/docs/htmlhyperlinkelementutils.search?q=123"> element be in the document var anchor = document.getelementbyid("myanchor"); var querystring = anchor.search; // returns:'?q=123' // further parsing: let params = new urlsearchparams(querystring); let q = parseint(params.get("q")); // is the number 123 specifications specification status comment html living standardthe definition of 'htmlhyperlinkelementutils.search' in that specification.
HTMLHyperlinkElementUtils.username - Web APIs
Web › API › HTMLHyperlinkElementUtils › username
the htmlhyperlinkelementutils.username property is a usvstring containing the username specified before the domain name.
... syntax string = object.username; object.username = string; examples // let's <a id="myanchor" href="https://anonymous:flabada@developer.mozilla.org/docs/htmlhyperlinkelementutils.username"> be in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.username; // returns:'anonymous' specifications specification status comment html living standardthe definition of 'htmlhyperlinkelementutils.username' in that specification.
HTMLIFrameElement.csp - Web APIs
Web › API › HTMLIFrameElement › csp
the csp property of the htmliframeelement interface specifies the content security policy that an embedded document must agree to enforce upon itself.
... syntax var csp = htmliframeelement.csp htmliframeelement.csp = csp value a content security policy.
HTMLIFrameElement.featurePolicy - Web APIs
Web › API › HTMLIFrameElement › featurePolicy
the featurepolicy read-only property of the htmliframeelement interface returns the featurepolicy interface which provides a simple api for introspecting the feature policies applied to a specific frame.
... syntax var policy = htmliframeelement.featurepolicy value a featurepolicy object that can be used to inspect the feature policy settings applied to the frame.
HTMLIFrameElement.src - Web APIs
Web › API › HTMLIFrameElement › src
the htmliframeelement.src property reflects the html referrerpolicy attribute of the <iframe> element defining which referrer is sent when fetching the resource.
... syntax refstr = iframeelt.src; iframeelt.src= refstr; example var iframe = document.createelement("iframe"); iframe.src = "/"; var body = document.getelementsbytagname("body")[0]; body.appendchild(iframe); // fetch the image using the complete url as the referrer specifications specification status comment html living standardthe definition of 'htmliframeelement: src' in that specification.
HTMLImageElement.decoding - Web APIs
Web › API › HTMLImageElement › decoding
the decoding property of the htmlimageelement interface represents a hint given to the browser on how it should decode the image.
...this can be useful when applied to <img> elements, but may be even more so when used for offscreen image objects.
HTMLImageElement.lowSrc - Web APIs
Web › API › HTMLImageElement › lowSrc
the htmlimageelement interface's obsolete lowsrc property can be used to specify the url of a reduced-quality or otherwise faster-loading version of the image specified by the src property.
... syntax htmlimageelement.lowsrc = imageurl; imageurl = htmlimageelement.lowsrc; value a domstring specifying the url of a version of the image specified by src which has been modified in some fashion so that it loads significantly more quickly than the primary image.
HTMLImageElement.referrerPolicy - Web APIs
Web › API › HTMLImageElement › referrerPolicy
the htmlimageelement.referrerpolicy property reflects the html referrerpolicy attribute of the <img> element defining which referrer is sent when fetching the resource.
... examples var img = new image(); img.src = 'img/logo.png'; img.referrerpolicy = 'origin'; var div = document.getelementbyid('divaround'); div.appendchild(img); // fetch the image using the origin as the referrer specifications specification status comment referrer policythe definition of 'referrerpolicy attribute' in that specification.
HTMLInputElement.multiple - Web APIs
Web › API › HTMLInputElement › multiple
the htmlinputelement.multiple property indicates if an input can have more than one value.
... example // fileinput is a <input type=file multiple> let fileinput = document.getelementbyid('myfileinput'); if (fileinput.multiple == true) { for (let i = 0; i < fileinput.files.length; i++) { // loop fileinput.files } // only one file available } else { let file = fileinput.files.item(0); } ...
HTMLInputElement: search event - Web APIs
Web › API › HTMLInputElement › search event
the search event is fired when a search is initiated usinng an <input> element of type="search".
...in that case the value of the <input> element will be the empty string.
HTMLLinkElement.as - Web APIs
Web › API › HTMLLinkElement › as
the as property of the htmllinkelement interface returns a domstring representing the type of content being loaded by the html link, one of "script", "style", "image", "video", "audio", "track", "font", "fetch".
... syntax var as = htmllinkelement.as htmllinkelement.as = as value a domstring.
HTMLLinkElement.referrerPolicy - Web APIs
Web › API › HTMLLinkElement › referrerPolicy
the htmllinkelement.referrerpolicy property reflect the html referrerpolicy attribute of the <link> element defining which referrer is sent when fetching the resource.
... syntax domstring htmllinkelement.referrerpolicy example var links = document.getelementsbytagname("link"); links[0].referrerpolicy; // "no-referrer" specifications specification status comment referrer policythe definition of 'referrerpolicy attribute' in that specification.
HTMLMediaElement.controlsList - Web APIs
Web › API › HTMLMediaElement › controlsList
the controlslist property of the htmlmediaelement interface returns a domtokenlist that helps the user agent select what controls to show on the media element whenever the user agent shows its own set of controls.
... syntax var domtokenlist = htmlmediaelement.controlslist; value a domtokenlist.
HTMLMediaElement: ended event - Web APIs
Web › API › HTMLMediaElement › ended event
this event occurs based upon htmlmediaelement (<audio> and <video>) fire ended when playback of the media reaches the end of the media.
... bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onended specification html5 media this event is also defined in media capture and streams and web audio api examples these examples add an event listener for the htmlmediaelement's ended event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement.initialTime - Web APIs
Web › API › HTMLMediaElement › initialTime
the htmlmediaelement.initialtime is the initial playback position in seconds.
... this property is obsolete, you can use a media fragments uri in the htmlmediaelement.src attribute instead.
HTMLMediaElement: loadeddata event - Web APIs
Web › API › HTMLMediaElement › loadeddata event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onloadeddata specification html5 media note that this event will not fire in mobile/tablet devices if data-saver is on in browser settings.
... examples these examples add an event listener for the htmlmediaelement's loadeddata event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: loadedmetadata event - Web APIs
Web › API › HTMLMediaElement › loadedmetadata event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onloadedmetadata specification html5 media additional properties property type description mozchannels read only int the number of channels.
... examples these examples add an event listener for the htmlmediaelement's loadedmetadata event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement.onerror - Web APIs
Web › API › HTMLMediaElement › onerror
the onerror property of the htmlmediaelement interface is the eventhandler for processing error events.
... syntax htmlmediaelement.onerror = eventlistener; value a function which serves as the event handler for the error event.
HTMLMediaElement.pause() - Web APIs
Web › API › HTMLMediaElement › pause
the htmlmediaelement.pause() method will pause playback of the media, if the media is already in a paused state this method will have no effect.
... syntax htmlmediaelement.pause() parameters none.
HTMLMediaElement.setMediaKeys() - Web APIs
Web › API › HTMLMediaElement › setMediaKeys
the setmediakeys() property of the htmlmediaelement interface returns a promise that resolves to the passed mediakeys, which are those used to decrypt media during playback.
... syntax var promise = htmlmediaelement.setmediakeys(mediakeys); parameters mediakeys a reference to a mediakeys object that the htmlmediaelement can use for decryption of media data during playback.
HTMLMediaElement.sinkId - Web APIs
Web › API › HTMLMediaElement › sinkId
the htmlmediaelement.sinkid read-only property returns a domstring that is the unique id of the audio device delivering output.
... syntax var sinkid = htmlmediaelement.sinkid specifications specification status comment audio output devices apithe definition of 'sinkid' in that specification.
HTMLObjectElement.checkValidity - Web APIs
Web › API › HTMLObjectElement › checkValidity
the checkvalidity() method of the htmlobjectelement interface returns a boolean that always is true, because object objects are never candidates for constraint validation.
... syntax const valid = htmlobjectelement.checkvalidity(); parameters none.
HTMLObjectElement.contentDocument - Web APIs
Web › API › HTMLObjectElement › contentDocument
the contentdocument read-only property of the htmlobjectelement interface returns a document representing the active document of the object element's nested browsing context, if any; otherwise null.
... syntax var document = htmlobjectelement.contentdocument; value a document.
HTMLObjectElement.contentWindow - Web APIs
Web › API › HTMLObjectElement › contentWindow
the contentwindow read-only property of the htmlobjectelement interface returns a windowproxy representing the window proxy of the object element's nested browsing context, if any; otherwise null.
... syntax var windowproxy = htmlobjectelement.contentwindow; value a windowproxy.
HTMLObjectElement.data - Web APIs
Web › API › HTMLObjectElement › data
the data property of the htmlobjectelement interface returns a domstring that reflects the data html attribute, specifying the address of a resource's data.
... syntax var data = htmlobjectelement.data; htmlobjectelement.data; value a domstring.
HTMLObjectElement.form - Web APIs
Web › API › HTMLObjectElement › form
the form read-only property of the htmlobjectelement interface retuns a htmlformelement representing the object element's form owner, or null if there isn't one.
... syntax var htmlformelement = htmlobjectelement.form; value a htmlformelement.
HTMLObjectElement.height - Web APIs
Web › API › HTMLObjectElement › height
the height property of the htmlobjectelement interface returns a domstring that reflects the height html attribute, specifying the displayed height of the resource in css pixels.
... syntax var string = htmlobjectelement.height; htmlobjectelement.height = string; value a domstring.
HTMLObjectElement.name - Web APIs
Web › API › HTMLObjectElement › name
the name property of the htmlobjectelement interface returns a domstring that reflects the name html attribute, specifying the name of the browsing context.
... syntax var string = htmlobjectelement.name; htmlobjectelement.name = string; value a domstring.
HTMLObjectElement.type - Web APIs
Web › API › HTMLObjectElement › type
the type property of the htmlobjectelement interface returns a domstring that reflects the type html attribute, specifying the mime type of the resource.
... syntax var string = htmlobjectelement.type htmlobjectelement.type = string; value a domstring.
HTMLObjectElement.useMap - Web APIs
Web › API › HTMLObjectElement › useMap
the usemap property of the htmlobjectelement interface returns a domstring that reflects the usemap html attribute, specifying a <map> element to use.
... syntax var string = htmlobjectelement.usemap; htmlobjectelement.usemap = string; value a domstring.
HTMLObjectElement.validationMessage - Web APIs
Web › API › HTMLObjectElement › validationMessage
the validationmessage read-only property of the htmlobjectelement interface returns a domstring representing a localized message that describes the validation constraints that the control does not satisfy (if any).
... syntax var string = htmlobjectelement.validationmessage; value a domstring.
HTMLObjectElement.validity - Web APIs
Web › API › HTMLObjectElement › validity
the validity read-only property of the htmlobjectelement interface returns a validitystate with the validity states that this element is in.
... syntax var validitystate = htmlobjectelement.validity; value a validitystate object.
HTMLObjectElement.width - Web APIs
Web › API › HTMLObjectElement › width
the width property of the htmlobjectelement interface returns a domstring that reflects the width html attribute, specifying the displayed width of the resource in css pixels.
... syntax var string = htmlobjectelement.width; htmlobjectelement.width = string; value a domstring.
HTMLElement.blur() - Web APIs
Web › API › HTMLOrForeignElement › blur
the htmlelement.blur() method removes keyboard focus from the current element.
... syntax element.blur(); examples remove focus from a text input html <input type="text" id="mytext" value="sample text"> <br><br> <button type="button" onclick="focusinput()">click me to gain focus</button> <button type="button" onclick="blurinput()">click me to lose focus</button> javascript function focusinput() { document.getelementbyid('mytext').focus(); } function blurinput() { document.getelementbyid('mytext').blur(); } result specification specification status comment html living standardthe definition of 'blur' in that specification.
HTMLOrForeignElement.nonce - Web APIs
Web › API › HTMLOrForeignElement › nonce
the nonce property of the htmlorforeignelement interface returns the cryptographic number used once that is used by content security policy to determine whether a given fetch will be allowed to proceed.
... in later implementations, elements only expose their nonce attribute to scripts (and not to side-channels like css attribute selectors).
HTMLTableElement.align - Web APIs
Web › API › HTMLTableElement › align
the htmltableelement.align property represents the alignment of the table.
... syntax htmltableelement.align = alignment; var alignment = htmltableelement.align; parameters alignment domstring with one of the following values: left center right example // set the alignmnet of a table var t = document.getelementbyid('tablea'); t.align = 'center'; specification w3c dom 2 html specification htmltableelement .align.
HTMLTableElement.rules - Web APIs
Web › API › HTMLTableElement › rules
the htmltableelement.rules property indicates which cell borders to render in the table.
... syntax htmltableelement.rules = rules; var rules = htmltableelement.rules; parameters rules is a string with one of the following values: none no rules groups lines between groups only rows lines between rows cols lines between cols all lines between all cells example // turn on all the internal borders of a table var t = document.getelementbyid("tableid"); t.rules = "all"; specification w3c dom 2 html specification ...
HTMLTableElement.summary - Web APIs
Web › API › HTMLTableElement › summary
the htmltableelement.summary property represents the table description.
... syntax htmltableelement.summary = string; varstring = htmltableelement.summary; example htmltableelement.summary = "usage statistics"; specification w3c dom 2 html specification ...
HTMLTableElement.width - Web APIs
Web › API › HTMLTableElement › width
the htmltableelement.width property represents the desired width of the table.
... syntax htmltableelement.width = width; var width = htmltableelement.width; where width is a string representing the width in number of pixels or as a percentage value.
HTMLVideoElement.msZoom - Web APIs
Web › API › HTMLVideoElement › msZoom
syntax htmlvideoelement.mszoom; value boolean value set to true trims the video frame to the display space.
... var myvideo = document.getelementbyid("videotag1"); myvideo.mszoom = true; myvideo.play(); see also htmlvideoelement microsoft api extensions ...
MathMLElement - Web APIs
Web › API › MathMLElement
the mathmlelement interface represents any mathml element.
... properties this interface has no properties, but inherits properties from: documentandelementeventhandlers, element, elementcssinlinestyle, globaleventhandlers, htmlorforeignelement methods this interface has no methods, but inherits methods from: documentandelementeventhandlers, element, elementcssinlinestyle, globaleventhandlers, htmlorforeignelement examples mathml <math xmlns="http://www.w3.org/1998/math/mathml"> <msqrt> <mi>x</mi> </msqrt> </math> javascript document.queryselector('msqrt').constructor.name; // mathmlelement specifications specification status comment mathmlelement interface ...
SVGAElement.target - Web APIs
Web › API › SVGAElement › target
the svgaelement.target read-only property of svgaelement returns an svganimatedstring object that specifies the portion of a target window, frame, pane into which a document is to be opened when a link is activated.
... sample values can be found here example the code is taken from the "svgaelement example code" ...
SVGAltGlyphElement.glyphRef - Web APIs
Web › API › SVGAltGlyphElement › glyphRef
the svgaltglyphelement.glyphref property is a domstring representing a glyph identifier.
... it has the same meaning as the ‘glyphref’ property on the svgglyphrefelement interface of the <glyphref> element.
SVGAnimationElement.onbegin - Web APIs
Web › API › SVGAnimationElement › onbegin
the svganimationelement.onbegin property refers to the event handler for the beginevent.
... syntax var begineventhandler = someelement.onbegin; specifications specification status comment svg animations level 2the definition of 'svganimationelement.onbegin' in that specification.
SVGAnimationElement.onend - Web APIs
Web › API › SVGAnimationElement › onend
the svganimationelement.onend property refers to the event handler for the endevent.
... syntax var endeventhandler = someelement.onend; specifications specification status comment svg animations level 2the definition of 'svganimationelement.onend' in that specification.
SVGAnimationElement.onrepeat - Web APIs
Web › API › SVGAnimationElement › onrepeat
the svganimationelement.onrepeat property refers to the event handler for the repeatevent.
... syntax var repeateventhandler = someelement.onrepeat; specifications specification status comment svg animations level 2the definition of 'svganimationelement.onrepeat' in that specification.
SVGGraphicsElement: copy event - Web APIs
Web › API › SVGGraphicsElement › copy event
the copy event fires on svggraphicselements when the user initiates a copy action through the browser's user interface.
...tp://www.w3.org/2000/svg"> <text x="5" y="10" id="text-to-copy">copy this text</text> <foreignobject x="5" y="20" width="90" height="20"> <input xmlns="http://www.w3.org/1999/xhtml" placeholder="paste it here"/> </foreignobject> </svg> css input { font-size: 10px; width: 100%; height: 90%; box-sizing: border-box; border: 1px solid black; } javascript document.getelementsbytagname("text")[0].addeventlistener("copy", evt => { evt.clipboarddata.setdata('text/plain', document.getselection().tostring().touppercase()); evt.preventdefault(); }); result specifications specification status comment scalable vector graphics (svg) 2 candidate recommendation definition that the clipboard events apply to svg elements.
SVGGraphicsElement: cut event - Web APIs
Web › API › SVGGraphicsElement › cut event
the cut event is fired on an svggraphicselement when the user has initiated a "cut" action through the browserʼs user interface.
... specifications specification status comment scalable vector graphics (svg) 2 candidate recommendation definition that the clipboard events apply to svg elements.
SVGImageElement.decode - Web APIs
Web › API › SVGImageElement › decode
the decode() method of the svgimageelement interface initiates asynchronous decoding of an image, returning a promise that resolves once the image data is ready for use.
... syntax var promise = svgimageelement.decode(); parameters none.
SVGImageElement.decoding - Web APIs
Web › API › SVGImageElement › decoding
the decoding property of the svgimageelement interface represents a hint given to the browser on how it should decode the image.
... syntax var refstr = svgimageelement.decoding svgimageelement.decoding = refstr; values a domstring representing the decoding hint.
SVGImageElement.height - Web APIs
Web › API › SVGImageElement › height
the height read-only property of the svgimageelement interface returns an svganimatedlength corresponding to the height attribute of the given <image> element.
... syntax var height = svgimageelement.height value an svganimatedlength.
SVGImageElement.preserveAspectRatio - Web APIs
Web › API › SVGImageElement › preserveAspectRatio
the preserveaspectratio read-only property of the svgimageelement interface returns an svganimatedpreserveaspectratio corresponding to the preserveaspectratio attribute of the given <image> element.
... syntax var svganimatedpreerveaspectratio = svgimageelement.preserveaspectratio; value an svganimatedpreserveaspectratio.
SVGImageElement.width - Web APIs
Web › API › SVGImageElement › width
the width read-only property of the svgimageelement interface returns an svganimatedlength corresponding to the width attribute of the given <image> element.
... syntax var width = svgimageelement.width; value an svganimatedlength.
SVGImageElement.x - Web APIs
Web › API › SVGImageElement › x
the x read-only property of the svgimageelement interface returns an svganimatedlength corresponding to the x attribute of the given <image> element.
... syntax var x = svgimageelement.x; value an svganimatedlength.
SVGImageElement.y - Web APIs
Web › API › SVGImageElement › y
the y read-only property of the svgimageelement interface returns an svganimatedlength corresponding to the y attribute of the given <image> element.
... syntax var y = svgimageelement.y; value an svganimatedlength.
HTMLSlotElement.assignedSlot - Web APIs
Web › API › Text › assignedSlot
the assignedslot property of the text interface returns the htmlslotelement object associated with the element.
... syntax var htmlslotelement = text.assignedslot value a htmlslotelement object.
<marquee>: The Marquee element (Obsolete) - HTML: Hypertext Markup Language
Web › HTML › Element › marquee
the html <marquee> element is used to insert a scrolling area of text.
... dom interface htmlmarqueeelement attributes behavior sets how the text is scrolled within the marquee.
<multicol>: The HTML Multi-Column Layout element (Obsolete) - HTML: Hypertext Markup Language
Web › HTML › Element › multicol
the html multi-column layout element (<multicol>) was an experimental element designed to allow multi-column layouts and must not be used.
...in order to implement a multi-column layout, you should be using the regular html elements, like <div> in conjunction with css columns.
<nobr>: The Non-Breaking Text element (obsolete) - HTML: Hypertext Markup Language
Web › HTML › Element › nobr
the non-standard, obsolete html <nobr> element prevents the text it contains from automatically wrapping across multiple lines, potentially resulting in the user having to scroll horizontally to see the entire width of the text.
... this element was never standard html and was not widely implemented, so you shouldn't use it.
SyntaxError: missing ] after element list - JavaScript
Web › JavaScript › Reference › Errors › Missing bracket after list
the javascript exception "missing ] after element list" occurs when there is an error with the array initializer syntax somewhere.
... message syntaxerror: missing ] after element list error type syntaxerror.
element - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › element
« xul reference home element type: id the id of the broadcaster element that the observer is observing.
removeelement - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › removeelement
« xul reference home removeelement type: id when placed on an element in an overlay, it indicates that the element in the base file should be removed from the window.
resizer.element - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › resizer.element
« xul reference home element type: element to resize the id of the element that should be resized by the resizer.
checkAdjacentElement - Archive of obsolete content
Archive › Mozilla › XUL › Method › checkAdjacentElement
« xul reference home checkadjacentelement( dir ) return type: no return value deselects the currently selected radio button in the group and selects the one adjacent to it.
ensureElementIsVisible - Archive of obsolete content
Archive › Mozilla › XUL › Method › ensureElementIsVisible
« xul reference home ensureelementisvisible( element ) return type: no return value if the specified element is not currently visible to the user, the displayed items are scrolled so that it is.
ensureSelectedElementIsVisible - Archive of obsolete content
Archive › Mozilla › XUL › Method › ensureSelectedElementIsVisible
« xul reference home ensureselectedelementisvisible() return type: no return value if the currently selected element in the list box is not currently visible to the user, the list box view is scrolled so that it is.
preferenceForElement - Archive of obsolete content
Archive › Mozilla › XUL › Method › preferenceForElement
« xul reference home preferenceforelement( uielement ) return type: preference element returns the preference element to which a user interface element is attached.
preferenceElements - Archive of obsolete content
Archive › Mozilla › XUL › Property › preferenceElements
« xul reference preferenceelements type: dom nodelist holds a list of the ui elements in the pane that are attached to preferences.
Test your skills: Images and Form elements - Learn web development
Learn › CSS › Building blocks › Images tasks
the aim of this task is to help you check your understanding of some of the values and units that we looked at in the lesson on images, media and form elements.
nsIDOMHTMLFormElement
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMHTMLFormElement
the nsidomhtmlformelement interface implements the dom htmlformelement interface.
nsIDOMXULSelectControlItemElement
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMXULSelectControlItemElement
inherits from: nsidomxulelement last changed in gecko 1.7 attributes attribute type description accesskey domstring command domstring control nsidomxulselectcontrolelement read only.
hasMoreElements
Mozilla › Tech › XPCOM › Reference › Interface › nsISimpleEnumerator › hasMoreElements
documentation is now located at nsisimpleenumerator.hasmoreelements().
Element: DOMActivate event - Web APIs
Web › API › Element › DOMActivate event
the domactivate event is fired at an element when it becomes active, such as when it is clicked on using the mouse or a keypress is used to navigate to it.
Element: dblclick event - Web APIs
Web › API › Element › dblclick event
the dblclick event fires when a pointing device button (such as a mouse's primary button) is double-clicked; that is, when it's rapidly clicked twice on a single element within a very short span of time.
Element: fullscreenerror event - Web APIs
Web › API › Element › fullscreenerror event
bubbles yes cancelable no interface event event handler property onfullscreenerror as with the fullscreenchange event, two fullscreenerror events are fired; the first is sent to the element which failed to change modes, and the second is sent to the document which contains that element.
Element: mousewheel event - Web APIs
Web › API › Element › mousewheel event
the obsolete and non-standard mousewheel event is fired asynchronously at an element to provide updates while a mouse wheel or similar device is operated.
Element: paste event - Web APIs
Web › API › Element › paste event
bubbles yes cancelable yes interface clipboardevent event handler property onpaste if the cursor is in an editable context (for example, in a <textarea> or an element with contenteditable attribute set to true) then the default action is to insert the contents of the clipboard into the document at the cursor position.
Element.runtimeStyle - Web APIs
Web › API › Element › runtimeStyle
summary element.runtimestyle is a proprietary property similar to htmlelement.style, except its styles, that have higher precedence and modification.
Element.scrollTopMax - Web APIs
Web › API › Element › scrollTopMax
the element.scrolltopmax read-only property returns a number representing the maximum top scroll offset possible for the element.
Element: scroll event - Web APIs
Web › API › Element › scroll event
the scroll event fires an element has been scrolled.
Element: webkitmouseforcedown event - Web APIs
Web › API › Element › webkitmouseforcedown event
after a mousedown event has been fired at the element, if and when sufficient pressure has been applied to the mouse or trackpad button to qualify as a "force click," safari begins sending webkitmouseforcedown events to the element.
Element: webkitmouseforceup event - Web APIs
Web › API › Element › webkitmouseforceup event
the non-standard webkitmouseforceup event is fired by safari at an element some time after the webkitmouseforcedown event, when pressure on the button has been reduced sufficiently to end the "force click".
Element: webkitmouseforcewillbegin event - Web APIs
Web › API › Element › webkitmouseforcewillbegin event
safari for macos fires the non-standard webkitmouseforcewillbegin event at an element before firing the initial mousedown event.
Element: wheel event - Web APIs
Web › API › Element › wheel event
examples scaling an element via the wheel this example shows how to scale an element using the mouse (or other pointing device) wheel.
HTMLAnchorElement.download - Web APIs
Web › API › HTMLAnchorElement › download
the htmlanchorelement.download property is a domstring indicating that the linked resource is intended to be downloaded rather than displayed in the browser.
HTMLCanvasElement: webglcontextcreationerror event - Web APIs
Web › API › HTMLCanvasElement › webglcontextcreationerror event
bubbles yes cancelable yes interface webglcontextevent event handler property none example var canvas = document.getelementbyid('canvas'); canvas.addeventlistener('webglcontextcreationerror', function(e) { console.log(e.statusmessage || 'unknown error'); }, false); var gl = canvas.getcontext('webgl'); // logs statusmessage or "unknown error" if unable to create webgl context specifications specification status comment webgl 1.0the definition of 'webglcontextcreationerror' in that specifi...
HTMLCanvasElement: webglcontextlost event - Web APIs
Web › API › HTMLCanvasElement › webglcontextlost event
bubbles yes cancelable yes interface webglcontextevent event handler property none example with the help of the webgl_lose_context extension, you can simulate the webglcontextlost event: const canvas = document.getelementbyid('canvas'); const gl = canvas.getcontext('webgl'); canvas.addeventlistener('webglcontextlost', (event) => { console.log(event); }); gl.getextension('webgl_lose_context').losecontext(); // "webglcontextlost" event is logged.
HTMLCanvasElement: webglcontextrestored event - Web APIs
Web › API › HTMLCanvasElement › webglcontextrestored event
bubbles yes cancelable yes interface webglcontextevent event handler property none example with the help of the webgl_lose_context extension, you can simulate the webglcontextrestored event: var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); canvas.addeventlistener('webglcontextrestored', function(e) { console.log(e); }, false); gl.getextension('webgl_lose_context').restorecontext(); // "webglcontextrestored" event is logged.
HTMLContentElement.getDistributedNodes() - Web APIs
Web › API › HTMLContentElement › getDistributedNodes
the htmlcontentelement.getdistributednodes() method returns a static nodelist of the distributed nodes associated with this <content> element.
HTMLDialogElement: close event - Web APIs
Web › API › HTMLDialogElement › close event
the close event is fired on an htmldialogelement object when the dialog it represents has been closed.
HTMLElement: lostpointercapture event - Web APIs
Web › API › HTMLElement › lostpointercapture event
bubbles yes cancelable no interface pointerevent event handler property onlostpointercapture examples this example listens for the lostpointercapture event for an element, and captures the pointer for the element on pointerdown.
HTMLElement.outerText - Web APIs
Web › API › HTMLElement › outerText
htmlelement.outertext is a non-standard property.
HTMLElement: pointerout event - Web APIs
Web › API › HTMLElement › pointerout event
the pointerout event is fired for several reasons including: pointing device is moved out of the hit test boundaries of an element; firing the pointerup event for a device that does not support hover (see pointerup); after firing the pointercancel event (see pointercancel); when a pen stylus leaves the hover range detectable by the digitizer.
HTMLElement: pointerover event - Web APIs
Web › API › HTMLElement › pointerover event
the pointerover event is fired when a pointing device is moved into an element's hit test boundaries.
HTMLElement: transitionrun event - Web APIs
Web › API › HTMLElement › transitionrun event
run', () => { console.log('transition is running but hasn\'t necessarily started transitioning yet'); }); the same, but using the ontransitionrun property instead of addeventlistener(): el.ontransitionrun = () => { console.log('transition started running, and will start transitioning when the transition delay has expired'); }; live example in the following example, we have a simple <div> element, styled with a transition that includes a delay: <div class="transition">hover over me</div> <div class="message"></div> .transition { width: 100px; height: 100px; background: rgba(255,0,0,1); transition-property: transform, background; transition-duration: 2s; transition-delay: 1s; } .transition:hover { transform: rotate(90deg); background: rgba(255,0,0,0); } to this, we'll a...
HTMLElement: transitionstart event - Web APIs
Web › API › HTMLElement › transitionstart event
bubbles yes cancelable no interface transitionevent event handler property ontransitionstart examples this code adds a listener to the transitionstart event: element.addeventlistener('transitionstart', () => { console.log('started transitioning'); }); the same, but using the ontransitionstart property instead of addeventlistener(): element.ontransitionrun = () => { console.log('started transitioning'); }; live example in the following example, we have a simple <div> element, styled with a transition that includes a delay: <div class="transition">hover over me</div> <div class="message"></div> .tran...
HTMLFormElement.encoding - Web APIs
Web › API › HTMLFormElement › encoding
the htmlformelement.encoding property is an alternative name for the enctype element on the dom htmlformelement object.
HTMLFormElement: reset event - Web APIs
Web › API › HTMLFormElement › reset event
time stamp: ${event.timestamp}`; } const form = document.getelementbyid('form'); const log = document.getelementbyid('log'); form.addeventlistener('reset', logreset); result specifications specification status comment html living standardthe definition of 'reset' in that specification.
HTMLIFrameElement.setNfcFocus() - Web APIs
Web › API › HTMLIFrameElement › setNFCFocus
the setnfcfocus() method of the htmliframeelement interface sets whether an <iframe> can receive an nfc event.
HTMLMediaElement: abort event - Web APIs
Web › API › HTMLMediaElement › abort event
bubbles no cancelable no interface event event handler property onabort examples const video = document.queryselector('video'); const videosrc = 'https://path/to/video.webm'; video.addeventlistener('abort', () => { console.log(`abort loading: ${videosrc}`); }); const source = document.createelement('source'); source.setattribute('src', videosrc); source.setattribute('type', 'video/webm'); video.appendchild(source); specifications specification status html living standard living standard html5 recommendation ...
HTMLMediaElement: canplay event - Web APIs
Web › API › HTMLMediaElement › canplay event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.oncanplay specification html5 media examples these examples add an event listener for the htmlmediaelement's canplay event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: canplaythrough event - Web APIs
Web › API › HTMLMediaElement › canplaythrough event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.oncanplaythrough specification html5 media examples these examples add an event listener for the htmlmediaelement's canplaythrough event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: durationchange event - Web APIs
Web › API › HTMLMediaElement › durationchange event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.ondurationchange specification html5 media examples these examples add an event listener for the htmlmediaelement's durationchange event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: emptied event - Web APIs
Web › API › HTMLMediaElement › emptied event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onemptied specification html5 media examples these examples add an event listener for the htmlmediaelement's emptied event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: loadstart event - Web APIs
Web › API › HTMLMediaElement › loadstart event
} video.addeventlistener('loadstart', handleevent); video.addeventlistener('progress', handleevent); video.addeventlistener('canplay', handleevent); video.addeventlistener('canplaythrough', handleevent); loadvideo.addeventlistener('click', () => { if (source) { document.location.reload(); } else { loadvideo.textcontent = "reset example"; source = document.createelement('source'); source.setattribute('src', 'https://interactive-examples.mdn.mozilla.net/media/examples/flower.webm'); source.setattribute('type', 'video/webm'); video.appendchild(source); } }); result specifications specification status html living standardthe definition of 'loadstart media event' in that specification.
HTMLMediaElement: play event - Web APIs
Web › API › HTMLMediaElement › play event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onplay specification html5 media examples these examples add an event listener for the htmlmediaelement's play event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: playing event - Web APIs
Web › API › HTMLMediaElement › playing event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onplaying specification html5 media examples these examples add an event listener for the htmlmediaelement's playing event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: progress event - Web APIs
Web › API › HTMLMediaElement › progress event
} video.addeventlistener('loadstart', handleevent); video.addeventlistener('progress', handleevent); video.addeventlistener('canplay', handleevent); video.addeventlistener('canplaythrough', handleevent); loadvideo.addeventlistener('click', () => { if (source) { document.location.reload(); } else { loadvideo.textcontent = "reset example"; source = document.createelement('source'); source.setattribute('src', 'https://interactive-examples.mdn.mozilla.net/media/examples/flower.webm'); source.setattribute('type', 'video/webm'); video.appendchild(source); } }); result specifications specification status html living standardthe definition of 'progress media event' in that specification.
HTMLMediaElement: ratechange event - Web APIs
Web › API › HTMLMediaElement › ratechange event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onratechange specification html5 media examples these examples add an event listener for the htmlmediaelement's ratechange event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: seeked event - Web APIs
Web › API › HTMLMediaElement › seeked event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onseeked specification html5 media examples these examples add an event listener for the htmlmediaelement's seeked event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: seeking event - Web APIs
Web › API › HTMLMediaElement › seeking event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onseeking specification html5 media examples these examples add an event listener for the htmlmediaelement's seeking event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: stalled event - Web APIs
Web › API › HTMLMediaElement › stalled event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onstalled specification html5 media examples these examples add an event listener for the htmlmediaelement's stalled event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: suspend event - Web APIs
Web › API › HTMLMediaElement › suspend event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onsuspend specification html5 media examples these examples add an event listener for the htmlmediaelement's suspend event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: timeupdate event - Web APIs
Web › API › HTMLMediaElement › timeupdate event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.ontimeupdate specification html5 media examples these examples add an event listener for the htmlmediaelement's timeupdate event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: volumechange event - Web APIs
Web › API › HTMLMediaElement › volumechange event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onvolumechange specification html5 media examples these examples add an event listener for the htmlmediaelement's volumechange event, then post a message when that event handler has reacted to the event firing.
HTMLMediaElement: waiting event - Web APIs
Web › API › HTMLMediaElement › waiting event
bubbles no cancelable no interface event target element default action none event handler property globaleventhandlers.onwaiting specification html5 media examples these examples add an event listener for the htmlmediaelement's waiting event, then post a message when that event handler has reacted to the event firing.
HTMLShadowElement.getDistributedNodes() - Web APIs
Web › API › HTMLShadowElement › getDistributedNodes
the htmlshadowelement.getdistributednodes() method returns a static nodelist of the distributed nodes associated with this <shadow> element.
HTMLStyleElement.scoped - Web APIs
Web › API › HTMLStyleElement › scoped
the htmlstyleelement.scoped property is a boolean value indicating if the element applies to the whole document (false) or only to the parent's sub-tree (true).
HTMLStyleElement.type - Web APIs
Web › API › HTMLStyleElement › type
the htmlstyleelement.type read-only property returns the type of the current style.
HTMLVideoElement.msIsStereo3D - Web APIs
Web › API › HTMLVideoElement › msIsStereo3D
syntax htmlvideoelement.msisstereo3d: boolean; value boolean value set to true indicates that the video source is stereo 3d.
SVGElement: abort event - Web APIs
Web › API › SVGElement › abort event
the abort event is fired when page loading is stopped before an svg element has been allowed to load completely.
SVGElement: error event - Web APIs
Web › API › SVGElement › error event
the error event is fired when an svg element does not load properly or when an error occurs during script execution.
SVGElement: load event - Web APIs
Web › API › SVGElement › load event
the load event fires on an svgelement when it is loaded in the browser, e.g.
SVGElement: resize event - Web APIs
Web › API › SVGElement › resize event
this event is only applicable to outermost svg elements and is dispatched after the resize operation has taken place.
Center an element - CSS: Cascading Style Sheets
Web › CSS › Layout cookbook › Center an element
in the future we may be able to center elements without needing to turn the parent into a flex container, as the box alignment properties used here are specified to apply to block layout too.
SVG image element - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › SVG Image Tag
« previousnext » the svg <image> element allows for raster images to be rendered within an svg object.
Index - Web APIs
Web › API › Index
in addition, it can execute multiple instances of the range of elements.
... 4 angle_instanced_arrays.drawelementsinstancedangle() angle_instanced_arrays, api, method, reference, webgl, webgl extension the angle_instanced_arrays.drawelementsinstancedangle() method of the webgl api renders primitives from array data like the gl.drawelements() method.
... in addition, it can execute multiple instances of a set of elements.
...And 1062 more matches
Index - Archive of obsolete content
Archive › Index
41 addon-page add-on sdk, add-ons, extensions, obsolete, reference create a page that does not contain navigational elements.
...xul <iframe> elements) that are not displayed to the user.
... 206 rosetta c, dom, html, htmlscriptelement, javascript, non-javascript, programming languages no summary!
...And 408 more matches
Index - Archive of obsolete content
Archive › Mozilla › XUL › Index
2 &lt;statusbarpanel&gt; deprecated, xul, xul elements, xul reference an individual element of a statusbar.
...this element is often used with a short label or icon to indicate status, for instance whether the user is online or whether there are new messages.
... 4 accessibility/xul accessibility reference accessibility, xul this table is designed to show how to expose text properly for various xul element types.
...And 300 more matches
HTML documentation index - HTML: Hypertext Markup Language
Web › HTML › Index
2 allowing cross-origin use of images and canvas advanced, cors, canvas, html, image, reference, security, storage, data html provides a crossorigin attribute for images that, in combination with an appropriate cors header, allows images defined by the <img> element that are loaded from foreign origins to be used in a <canvas> as if they had been loaded from the current origin.
... 3 applying color to html elements using css beginner, css, css colors, guide, html, html colors, html styles, styling html, color with css, there are lots of ways to add color to your html elements to create just the look you want.
... 4 block-level elements beginner, development, guide, html, html5, web html (hypertext markup language) elements historically were categorized as either "block-level" elements or "inline-level" elements.
...And 244 more matches
SVG documentation index - SVG: Scalable Vector Graphics
Web › SVG › Index
3 compatibility sources svg the following sources are used for the compatibility tables on svg elements and attributes: 4 content type needstechnicalreview, svg, types, data types svg makes use of a number of data types.
... 5 linking guide, svg the target attribute on the svg <a> element doesn't work in mozilla firefox 1.5.
... 10 replaced element svg this page was auto-generated because a user created a sub-page to this page.
...And 198 more matches
Chapter 3: Introduction to XUL—How to build a more intuitive UI - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › Firefox addons developer guide › Introduction to XUL—How to build a more intuitive UI
for each element that i explain in this chapter, i will illustrate it with a source code example.
...the root element in xul is generally the "window" element.
... because a xul document is also an xml document, it can contain xhtml, svg, mathml, and other elements; if you use external entity references, the xml document's contents are modularized; combined with other xml-related technologies, such as dom, xlink, or xslt, you can use it for a number of different applications.
...And 110 more matches
Event reference
Web › Events
focus events event name fired when focus an element has received focus (does not bubble).
... blur an element has lost focus (does not bubble).
... focusin an element is about to receive focus (does bubble).
...And 68 more matches
Getting started with HTML - Learn web development
Learn › HTML › Introduction to HTML › Getting started
to get you started, this article defines elements, attributes, and all the other important terms you may have heard.
...you will learn how html elements are structured, how a typical html page is structured, and other important basic language features.
... objective: to gain basic familiarity with html, and practice writing a few html elements.
...And 67 more matches
Anonymous Content - Archive of obsolete content
Archive › Mozilla › XBL › XBL 1.0 Reference › Anonymous Content
introduction a binding can specify an anonymous content template using the content element.
... this template describes a content tree that will be generated around the bound element during binding attachment.
... an element declared in a bound document using a single tag can then be constructed out of multiple child elements, and this implementation is hidden from the bound document.
...And 65 more matches
Positioning - Learn web development
Learn › CSS › CSS layout › Positioning
previous overview: css layout next positioning allows you to take elements out of the normal document layout flow, and make them behave differently; for example sitting on top of one another, or always remaining in the same place inside the browser viewport.
...or if you want to create a ui element that floats over the top of other parts of the page, and/or always sits in the same place inside the browser window no matter how much the page is scrolled?
... there are a number of different types of positioning that you can put into effect on html elements.
...And 55 more matches
Intersection Observer API - Web APIs
Web › API › Intersection Observer API
the intersection observer api provides a way to asynchronously observe changes in the intersection of a target element with an ancestor element or with a top-level document's viewport.
... historically, detecting visibility of an element, or the relative visibility of two elements in relation to each other, has been a difficult task for which solutions have been unreliable and prone to causing the browser and the sites the user is accessing to become sluggish.
... implementing intersection detection in the past involved event handlers and loops calling methods like element.getboundingclientrect() to build up the needed information for every element affected.
...And 54 more matches
display - CSS: Cascading Style Sheets
Web › CSS › display
the display css property sets whether an element is treated as a block or inline element and the layout used for its children, such as flow layout, grid or flex.
... formally, the display property sets an element's inner and outer display types.
... the outer type sets an element's participation in flow layout; the inner type sets the layout of children.
...And 51 more matches
HTML attribute reference - HTML: Hypertext Markup Language
Web › HTML › Attributes
elements in html have attributes; these are additional values that configure the elements or adjust their behavior in various ways to meet the criteria the users want.
... attribute list attribute name elements description accept <form>, <input> list of types the server accepts, typically a file type.
... accesskey global attribute keyboard shortcut to activate or add focus to the element.
...And 50 more matches
Index - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Index
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes found 54 pages: # page tags and summary 1 xslt: extensible stylesheet language transformations landing, web, xslt extensible stylesheet language transformations (xslt) is an xml-based language used, in conjunction with specialized processing software, for the transformation of xml documents.
... 19 xslt elements reference element, overview, reference, xslt there are two types of elements discussed here: top-level elements and instructions.
... a top-level element must appear as the child of either <xsl:stylesheet> or <xsl:transform>.
...And 50 more matches
Plug-in Basics - Plugins
Plugins › Guide › Plug-in Basics
you might need to know which plug-in is configured for a mime type, for example, to dynamically create an object element on the page if the user has a plug-in configured for the mime type.
... the way plug-ins are displayed on the web page is determined by the html element that invokes them.
...depending on the element and its attributes, a plug-in can be visible or hidden, or can appear as part of a page or as a full page in its own window.
...And 48 more matches
Global attributes - HTML: Hypertext Markup Language
Web › HTML › Global attributes
global attributes are attributes common to all html elements; they can be used on all elements, though they may have no effect on some elements.
... global attributes may be specified on all html elements, even those not specified in the standard.
... that means that any non-standard elements must still permit these attributes, even though using those elements means that the document is no longer html5-compliant.
...And 46 more matches
xlink:href - SVG: Scalable Vector Graphics
Web › SVG › Attribute › xlink:href
the exact meaning of that link depends on the context of each element using it.
... 22 elements are using this attribute: <a>, <altglyph>, <animate>, <animatecolor>, <animatemotion>, <animatetransform>, <color-profile>, <cursor>, <feimage>, <filter>, <font-face-uri>, <glyphref>, <image>, <lineargradient>, <mpath>, <pattern>, <radialgradient>, <script>, <set>, <textpath>, <tref>, and <use>} html, body, svg { height: 100%; } <svg viewbox="0 0 160 40" xmlns="http://www.w3.org/2000/svg"> <a xlink:href="https://developer.mozilla.org/"><text x="10" y="25">mdn web docs</text></a> </svg> a for <a>, xlink:href defines the location of the referenced object.
... value <iri> default value none animatable yes altglyph for <altglyph>, xlink:href defines the reference either to a <glyph> element in an svg document fragment or to an <altglyphdef> element.
...And 46 more matches
Migrate apps from Internet Explorer to Mozilla - Archive of obsolete content
Archive › Mozilla › Migrate apps from Internet Explorer to Mozilla
not only does this make the code easier to read, it simplifies adding support for new clients: var elm = getelmbyid("myid"); function getelmbyid(aid){ var element = null; if (ismozilla || isie5) element = document.getelementbyid(aid); else if (isnetscape4) element = document.layers[aid]; else if (isie4) element = document.all[aid]; return element; } the above code still has the issue of browser sniffing, or detecting which browser the user is using.
...for example, rather than: if (ismozilla || isie5) you would use: if (document.getelementbyid) this would allow other browsers that support that w3c standard method, such as opera or safari, to work without any changes.
...conditionistrue : conditionisfalse; for example, to retrieve an element, you would use: function getelement(aid){ return (document.getelementbyid) ?
...And 45 more matches
XUL Events - Archive of obsolete content
Archive › Mozilla › XUL › Events
« xul reference home the following tables and sections describe the event handler that are valid for most xul elements.
... xul event reference subpages broadcastthe broadcast event is executed when the attributes of the element (such as a broadcaster) being listened to are changed.
... the event handler should be placed on an observer.checkboxstatechangethe checkboxstatechange event is executed when the state of a <checkbox> element has changed.closethe close event is executed when a request has been made to close the window when the user presses the close button.commandthe command event is executed when an element is activated.commandupdatethe commandupdate event is executed when a command update occurs on a <commandset>.
...And 45 more matches
Accessibility documentation index - Accessibility
Web › Accessibility › Index
10 basic form hints aria, accessibility, forms when implementing forms using traditional html form-related elements, it is important to provide labels for controls, and explicitly associate a label with its control.
...its parameter is a string that consists of the ids of the html elements you want to concatenate into a single accessible name.
...here's where to file bugs: 13 using aria: roles, states, and properties aria, accessibility, overview, reference aria defines semantics that can be applied to elements, with these divided into roles (defining a type of user interface element) and states and properties that are supported by a role.
...And 45 more matches
MathML documentation index - MathML
Web › MathML › Index
more details for each attribute are available on particular element pages.
... 7 values guide, mathml, mathml reference several mathml presentation elements have attributes that accept length values used for size or spacing.
... 8 mathml documentation index index, mathml found 40 pages: 9 mathml element reference mathml, mathml reference this is an alphabetical list of mathml presentation elements.
...And 45 more matches
Examine and edit HTML - Firefox Developer Tools
Tools › Page Inspector › How to › Examine and edit HTML
this shows the complete hierarchy through the document for the branch containing the selected element: hovering over a breadcrumb highlights that element in the page.
... css selector search you can search elements by entering a css selector.
...this allows you to search for specific elements without the conflict of matching words within the text.
...And 44 more matches
Document - Web APIs
Web › API › Document
the dom tree includes elements such as <body> and <table>, among many others.
... it provides functionality globally to the document, like how to obtain the page's url and create new elements in the document.
... document.documentelementread only returns the element that is a direct child of the document.
...And 44 more matches
jspage - Archive of obsolete content
Archive › Mozilla › Jetpack › jspage
$type(b); return(a)?((a!="array"&&a!="arguments")?[b]:b):[];}var $time=date.now||function(){return +new date;};function $try(){for(var b=0,a=arguments.length;b<a; b++){try{return arguments[b]();}catch(c){}}return null;}function $type(a){if(a==undefined){return false;}if(a.$family){return(a.$family.name=="number"&&!isfinite(a))?false:a.$family.name; }if(a.nodename){switch(a.nodetype){case 1:return"element";case 3:return(/\s/).test(a.nodevalue)?"textnode":"whitespace";}}else{if(typeof a.length=="number"){if(a.callee){return"arguments"; }else{if(a.item){return"collection";}}}}return typeof a;}function $unlink(c){var b;switch($type(c)){case"object":b={};for(var e in c){b[e]=$unlink(c[e]); }break;case"hash":b=new hash(c);break;case"array":b=[];for(var d=0,a=c.length;d<a;d++){b[d]=$unlink(c[d]);}break;...
...;}return b;}var browser=$merge({engine:{name:"unknown",version:0},platform:{name:(window.orientation!=undefined)?"ipod":(navigator.platform.match(/mac|win|linux/i)||["other"])[0].tolowercase()},features:{xpath:!!(document.evaluate),air:!!(window.runtime),query:!!(document.queryselector)},plugins:{},engines:{presto:function(){return(!window.opera)?false:((arguments.callee.caller)?960:((document.getelementsbyclassname)?950:925)); },trident:function(){return(!window.activexobject)?false:((window.xmlhttprequest)?((document.queryselectorall)?6:5):4);},webkit:function(){return(navigator.taintenabled)?false:((browser.features.xpath)?((browser.features.query)?525:420):419); },gecko:function(){return(!document.getboxobjectfor&&window.mozinnerscreenx==null)?false:((document.getelementsbyclassname)?19:18);}...
...(function(){var a=($try(function(){return navigator.plugins["shockwave flash"].description; },function(){return new activexobject("shockwaveflash.shockwaveflash").getvariable("$version");})||"0 r0").match(/\d+/g);return{version:parseint(a[0]||0+"."+a[1],10)||0,build:parseint(a[2],10)||0}; })();function $exec(b){if(!b){return b;}if(window.execscript){window.execscript(b);}else{var a=document.createelement("script");a.setattribute("type","text/javascript"); a[(browser.engine.webkit&&browser.engine.version<420)?"innertext":"text"]=b;document.head.appendchild(a);document.head.removechild(a);}return b;}native.uid=1; var $uid=(browser.engine.trident)?function(a){return(a.uid||(a.uid=[native.uid++]))[0];}:function(a){return a.uid||(a.uid=native.uid++);};var window=new native({name:"window",legacy:(brows...
...And 43 more matches
Templates - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Templates
« previousnext » in this section, we'll find out how to populate elements with data.
... populating elements xul provides a method in which we create elements from data supplied by rdf, either from an rdf file or from an internal datasource.
... usually, elements such as treeitems and menuitems will be populated with data.
...And 43 more matches
Index
Mozilla › Tech › XPCOM › Index
239 innerhtml for the dom property, see element.innerhtml.
... 284 role enumerated accessible role for the associated element.
... 336 nsiarray interfaces, interfaces:scriptable, xpcom, xpcom api reference, xpcom interface reference an indexed collection of elements.
...And 43 more matches
The HTML DOM API - Web APIs
Web › API › HTML DOM API
the html dom api is made up of the interfaces that define the functionality of each of the elements in html, as well as any supporting types and interfaces they rely upon.
... the functional areas included in the html dom api include: access to and control of html elements via the dom.
... management of media connected to the html media elements (<audio> and <video>).
...And 43 more matches
Using the Right Markup to Invoke Plugins - Archive of obsolete content
Archive › Web Standards › Using the Right Markup to Invoke Plugins
it discusses the object element and the embed element, with details about using the most apt html to invoke java in a web page as well.
... the object element: w3c standards and cross-browser issues the object element is part of the html 4.01 specification, and is the recommended mechanism to invoke plugins.
... traditionally, the object element has been used differently by microsoft internet explorer and by mozilla-based browsers such as netscape 7.
...And 42 more matches
Introduction to CSS layout - Learn web development
Learn › CSS › CSS layout › Introduction
css page layout techniques allow us to take elements contained in a web page and control where they are positioned relative to their default position in normal layout flow, the other elements around them, their parent container, or the main viewport/window.
...let's look at a quick html example: <p>i love my cat.</p> <ul> <li>buy cat food</li> <li>exercise</li> <li>cheer up friend</li> </ul> <p>the end!</p> by default, the browser will display this code as follows: note here how the html is displayed in the exact order in which it appears in the source code, with elements stacked up on top of one another — the first paragraph, followed by the unordered list, followed by the second paragraph.
... the elements that appear one below the other are described as block elements, in contrast to inline elements, which appear one beside the other, like the individual words in a paragraph.
...And 42 more matches
Box Objects - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Box Objects
for instance, the key element doesn't have any layout objects since it isn't displayed in any way.
... similarly, any element that has been hidden will not have a layout object either.
...it's relatively simple to determine what kind of content tree node will be created for a given element.
...And 40 more matches
WAI-ARIA basics - Learn web development
Learn › Accessibility › WAI-ARIA basics
for example, html5 introduced a number of semantic elements to define common page features (<nav>, <footer>, etc.) before these were available, developers would simply use <div>s with ids or classes, e.g.
...as a result, developers quite often rely on javascript libraries that generate such controls as a series of nested <div>s or table elements with classnames, which are then styled using css and controlled using javascript.
... the problem here is that visually they work, but screenreaders can't make any sense of what they are at all, and their users just get told that they can see a jumble of elements with no semantics to describe what they mean.
...And 40 more matches
position - CSS: Cascading Style Sheets
Web › CSS › position
the position css property sets how an element is positioned in a document.
... the top, right, bottom, and left properties determine the final location of positioned elements.
... values static the element is positioned according to the normal flow of the document.
...And 40 more matches
Using HTML sections and outlines - Developer guides
Web › Guide › HTML › Using HTML sections and outlines
the html5 specification introduced several semantic sectioning elements to help organize the structure of documents.
... semantic sectioning elements are specifically designed to communicate structural meaning to browsers and other technologies interpreting the document on behalf of users, such as screen readers and voice assistants.
... semantic sectioning elements clarify the larger-scale structures within a document.
...And 39 more matches
Document Object Model - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Document Object Model
« previousnext » the document object model (dom) can be used with xul elements to get information about them or modify them.
...specific xul elements also provide additional functions which may be used.
... retrieving elements the most common method to retrieve an element in a document is to give the element an id attribute and the use the document's getelementbyid() method.
...And 38 more matches
How to build custom form controls - Learn web development
Learn › Forms › How to build custom form controls
for example, if you need to perform advanced styling on some controls such as the <select> element or if you want to provide custom behaviors, you may consider building your own controls.
...to that end, we will work with an example: rebuilding the <select> element.
... in our example, we will rebuild the <select> element.
...And 38 more matches
listbox - Archive of obsolete content
Archive › Mozilla › XUL › listbox
« xul reference home [ examples | attributes | properties | methods | related ] this element is used to create a list of items where one or more of the items may be selected.
...a listbox is expected to contain listitem elements.
...if you wish to create a list with variable height rows, or with non-text content, you should instead use the richlistbox element.
...And 37 more matches
menuitem - Archive of obsolete content
Archive › Mozilla › XUL › menuitem
« xul reference home [ examples | attributes | properties | methods | related ] a single choice in a menupopup element.
... attributes acceltext, accesskey, allowevents, autocheck, checked, closemenu, command, crop, description, disabled, image, key, label, name, selected, tabindex, type, validate, value properties accessibletype, accesskey, command, control, crop, disabled, image, label, labelelement, parentcontainer, selected, tabindex, value style classes menuitem-iconic, menuitem-non-iconic examples <menulist> <menupopup> <menuitem label="option 1" value="1"/> <menuitem label="option 2" value="2"/> <menuitem label="option 3" value="3"/> <menuitem label="option 4" value="4"/> </menupopup> </menulist> attributes acceltext type: string text tha...
...this should be one of the characters that appears in the label attribute for the element.
...And 37 more matches
menulist - Archive of obsolete content
Archive › Mozilla › XUL › menulist
« xul reference home [ examples | attributes | properties | methods | related ] an element that can be used for drop-down choice lists.
... the user may select one of the elements displayed in the menulist.
... the currently selected choice is displayed on the menulist element.
...And 37 more matches
HTML basics - Learn web development
Learn › Getting started with the web › HTML basics
html consists of a series of elements, which you use to enclose, or wrap, different parts of the content to make it appear a certain way, or act a certain way.
... for example, take the following line of content: my cat is very grumpy if we wanted the line to stand by itself, we could specify that it is a paragraph by enclosing it in paragraph tags: <p>my cat is very grumpy</p> anatomy of an html element let's explore this paragraph element a bit further.
... the main parts of our element are as follows: the opening tag: this consists of the name of the element (in this case, p), wrapped in opening and closing angle brackets.
...And 37 more matches
XPCOM array guide
Mozilla › Tech › XPCOM › Guide › Arrays
nstptrarray<t> and nsautotptrarray<t> - similar to using t* with the above arrays, but also provides a safeelementat() accessor.
... as of gecko 8, safeelementat() is now directly available on nstarray for arrays instantiated with pointer types.
...instead of incrementally accessing each element of the array by its index, the arrays provide a way to pass in a callback function that will be called for each element in the array.
...And 37 more matches
Indexed collections - JavaScript
Web › JavaScript › Guide › Indexed collections
creating an array the following statements create equivalent arrays: let arr = new array(element0, element1, ..., elementn) let arr = array(element0, element1, ..., elementn) let arr = [element0, element1, ..., elementn] element0, element1, ..., elementn is a list of values for the array's elements.
... when these values are specified, the array is initialized with them as the array's elements.
...otherwise, an array with a single element (the provided value) will be created.
...And 37 more matches
href - SVG: Scalable Vector Graphics
Web › SVG › Attribute › href
the exact meaning of that link depends on the context of each element using it.
... fifteen elements are using this attribute: <a>, <animate>, <animatemotion>, <animatetransform>, <discard>, <feimage>, <image>, <lineargradient>, <mpath>, <pattern>, <radialgradient>, <script>, <set>, <textpath>, and <use> html, body, svg { height: 100%; } <svg viewbox="0 0 160 40" xmlns="http://www.w3.org/2000/svg"> <a href="https://developer.mozilla.org/"><text x="10" y="25">mdn web docs</text></a> </svg> in svg a for <a>, href defines the location of the referenced object, expressed as a url reference.
... value <url> default value none animatable yes animate, animatemotion, animatetransform, set for the <animate>, <animatemotion>, <animatetransform>, and <set>, href defines a url referring to the element which is the target of this animation element and which therefore will be modified over time.
...And 37 more matches
Web Components
Web › Web Components
web components is a suite of different technologies allowing you to create reusable custom elements — with their functionality encapsulated away from the rest of your code — and utilize them in your web apps.
... web components aims to solve such problems — it consists of three main technologies, which can be used together to create versatile custom elements with encapsulated functionality that can be reused wherever you like without fear of code collisions.
... custom elements: a set of javascript apis that allow you to define custom elements and their behaviour, which can then be used as desired in your user interface.
...And 36 more matches
Popup Menus - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Popup Menus
plain popups the plain popup is a popup window which appears when the user presses the left mouse button on an element.
... tooltips a tooltip popup window will appear when the user hovers over an element with the mouse.
...the type of popup is determined by the element that invokes the popup.
...And 35 more matches
menu - Archive of obsolete content
Archive › Mozilla › XUL › menu
« xul reference home [ examples | attributes | properties | methods | related ] an element, much like a button, that is placed on a menubar.
... when the user clicks the menu element, the child menupopup of the menu will be displayed.
... this element is also used to create submenus.
...And 35 more matches
textbox - Archive of obsolete content
Archive › Mozilla › XUL › textbox
it is similar to the html input element.
... disabled type: boolean indicates whether the element is disabled or not.
... if this attribute is set, the element is disabled.
...And 35 more matches
Browser API
Mozilla › Gecko › Chrome › API › Browser API
the html browser api is an extension of the html <iframe> element that allows web apps to implement browsers or browser-like applications.
... browser api concepts and usage the browser api consists of two major parts: custom <iframe> attributes: by adding a mozbrowser attribute to the <iframe> element we can make it appear like a top-level browser window to the embedded content.
... this means that window.top, window.parent, window.frameelement, etc.
...And 35 more matches
Focus and Selection - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Focus and Selection
« previousnext » the section will describe how to handle the focus and selection of elements.
... focused elements the focused element refers to the element which currently receives input events.
...only one element per window has the focus at a time.
...And 34 more matches
XUL accessibility guidelines - Archive of obsolete content
Archive › Mozilla › XUL › XUL accessibility guidelines
by default, the tab order is determined by the order of the elements in the underlying code.
... ensure that tab order is logical and all interactive elements can be accessed simply without the use of a mouse.
... context menus the context menu is the small menu activated with a right mouse click on a content area or element (or with shift + f10 or vk_apps on windows and ctrl + click or ctrl + space on a mac).
...And 34 more matches
menuseparator - Archive of obsolete content
Archive › Mozilla › XUL › menuseparator
attributes acceltext, accesskey, allowevents, command, crop, disabled, image, label, selected, tabindex, value properties accessibletype, accesskey, command, control, crop, disabled, image, label, labelelement, parentcontainer, selected, tabindex, value examples <menu label="menu"> <menupopup> <menuitem label="item1"/> <menuseparator/> <menuitem label="item2"/> <menuitem label="item3"/> </menupopup> </menu> attributes acceltext type: string text that appears beside the menu label to indicate the shortcut key (accelerator key) to use to invoke the com...
...this should be one of the characters that appears in the label attribute for the element.
... allowevents type: boolean if true, events are passed to children of the element.
...And 34 more matches
Index - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Index
12 accessibility tree (aom) aom, accessibility, dom, glossary, reference the accessibility tree, or accessibility object model (aom), contains accessibility-related information for most html elements.
... 25 attribute codingscripting, glossary, html an attribute extends an element, changing its behavior or providing metadata.
...it may refer to: 33 block (css) css, codingscripting, design, glossary, html a block on a webpage is an html element that appears on a new line, i.e.
...And 34 more matches
Client-side form validation - Learn web development
Learn › Forms › Form validation
this is done by using validation attributes on form elements.
... when an element is valid, the following things are true: the element matches the :valid css pseudo-class, which lets you apply a specific style to valid elements.
... when an element is invalid, the following things are true: the element matches the :invalid css pseudo-class, and sometimes other ui pseudo-classes (e.g., :out-of-range) depending on the error, which lets you apply a specific style to invalid elements.
...And 34 more matches
Text labels and names - Accessibility
Web › Accessibility › Understanding WCAG › Text labels and names
use alt attribute to label area elements that have the href attribute in image maps, give each <area> element an alt attribute containing a name that describes what resources the areas links to.
... examples the following example show a simple image map (taken from h24: providing text alternatives for the area elements of image maps): <img src="welcome.gif" usemap="#map1" alt="areas in the library.
... select an area for more information on that area." /> <map id="map1" name="map1"> <area shape="rect" coords="0,0,30,30" href="reference.html" alt="reference" /> <area shape="rect" coords="34,34,100,100" href="media.html" alt="audio visual lab" /> </map> see the <area> element reference page for a live interactive example.
...And 34 more matches
Building accessible custom components in XUL - Archive of obsolete content
Archive › Mozilla › XUL › Building accessible custom components in XUL
assistive technologies could only see the generic html markup used to build the control; they had no way of knowing that a particular collection of div and span elements should be treated as a single cohesive control (such as a tab bar or a treeview).
... by implementing dhtml accessibility techniques, web developers can declare that generic html elements are really acting as specific gui controls (such as a treeitem within a treeview).
...firefox ships with a tabbox element and a tree element, and these elements are fully accessible out-of-the-box.
...And 33 more matches
Textbox (XPFE autocomplete) - Archive of obsolete content
Archive › Mozilla › XUL › Textbox (XPFE autocomplete)
« xul reference home [ examples | attributes | properties | methods | related ] this element is created by setting the type attribute of a textbox to autocomplete.
...this should be one of the characters that appears in the label attribute for the element.
... crop type: boolean this attribute is not used and is only provided for compatibility with the menulist element.
...And 33 more matches
listitem - Archive of obsolete content
Archive › Mozilla › XUL › listitem
the text of the listitem is specified either using listcell elements, or by placing a label attribute directly on the listitem element.
... by default it contains a single listcell element of type and class appropriate to that of the listitem.
...this should be one of the characters that appears in the label attribute for the element.
...And 33 more matches
richlistbox - Archive of obsolete content
Archive › Mozilla › XUL › richlistbox
« xul reference home [ examples | attributes | properties | methods | related ] this element is used to create a list of listitems (richlistitems), similar to a listbox, but is designed to be used when the items do not contain simple text content.
... attributes disabled, disablekeynavigation, preference, seltype, suppressonselect, tabindex, value properties accessibletype, currentindex, currentitem, disabled, disablekeynavigation, itemcount, scrollboxobject, selectedcount, selectedindex, selecteditem, selecteditems, seltype, suppressonselect, tabindex, value methods additemtoselection, appenditem, clearselection, ensureelementisvisible, ensureindexisvisible, getindexoffirstvisiblerow, getindexofitem, getitematindex, getnumberofvisiblerows, getrowcount, getselecteditem, insertitemat, invertselection, movebyoffset, removeitemat, removeitemfromselection, scrolltoindex, selectall, selectitem, selectitemrange, timedselect, toggleitemselection examples <richlistbox> <richlistitem> <description>a xul description!</de...
...scription> </richlistitem> <richlistitem> <button label="a xul button"/> </richlistitem> </richlistbox> the richlistbox element contains multiple richlistitem elements, which can contain any content.
...And 33 more matches
nsIFocusManager
Mozilla › Tech › XPCOM › Reference › Interface › nsIFocusManager
n gecko 5.0 (firefox 5.0 / thunderbird 5.0 / seamonkey 2.2) implemented by: @mozilla.org/focus-manager;1 as a service: var focusmanager = components.classes["@mozilla.org/focus-manager;1"] .getservice(components.interfaces.nsifocusmanager); method overview void clearfocus(in nsidomwindow awindow); void contentremoved(in nsidocument adocument, in nsicontent aelement); native code only!
... nsidomelement getfocusedelementforwindow(in nsidomwindow awindow, in prbool adeep, out nsidomwindow afocusedwindow); pruint32 getlastfocusmethod(in nsidomwindow window); void movecarettofocus(in nsidomwindow awindow); void elementisfocusable(in nsidomelement aelement, in unsigned long aflags); nsidomelement movefocus(in nsidomwindow awindow, in nsidomelement astartelement, in unsigned long atype, in unsigned long aflags); void setfocus(in nsidomelement aelement, in unsigned long aflags); void windowhidden(in nsidomwindow awindow); native code only!
...setting the activewindow raises it, and focuses the current child window's current element, if any.
...And 33 more matches
Using templates and slots - Web Components
Web › Web Components › Using templates and slots
this article explains how you can use the <template> and <slot> elements to create a flexible template that can then be used to populate the shadow dom of a web component.
...this was possible before, but it is made a lot easier by the html <template> element (which is well-supported in modern browsers).
... this element and its contents are not rendered in the dom, but it can still be referenced using javascript.
...And 33 more matches
Broadcasters and Observers - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Broadcasters and Observers
« previousnext » there may be times when you want several elements to respond to events or changes of state easily.
... command attribute forwarding we've already seen that elements such as buttons can be hooked up to commands.
... in addition, if you place the disabled attribute on the command element, any elements hooked up to it will also become disabled automatically.
...And 32 more matches
XUL controls - Archive of obsolete content
Archive › Mozilla › XUL › XUL controls
<button label="save" accesskey="s"/> more information about the button element.
... <button type="menu" label="view"> <menupopup> <menuitem label="list"/> <menuitem label="details"/> </menupopup> </button> more information about this type of menu button element.
... button reference related elements: menupopup menuitem <button type="menu-button"> a button that that has a separate arrow button with a menu attached to it.
...And 32 more matches
The box model - Learn web development
Learn › CSS › Building blocks › The box model
padding, margin and border will cause other elements to be pushed away from the box unless we decide to change the display type to inline, elements such as headings (e.g.
... the <a> element, used for links, <span>, <em> and <strong> are all examples of elements that will display inline by default.
... the type of box applied to an element is defined by display property values such as block and inline, and relates to the outer value of display.
...And 32 more matches
CSS basics - Learn web development
Learn › Getting started with the web › CSS basics
css is what you use to selectively style html elements.
...(the term ruleset is often referred to as just rule.) note the names of the individual parts: selector this is the html element name at the start of the ruleset.
... it defines the element(s) to be styled (in this example, <p> elements).
...And 32 more matches
nsIHTMLEditor
Mozilla › Tech › XPCOM › Reference › Interface › nsIHTMLEditor
void adddefaultproperty(in nsiatom aproperty, in astring aattribute, in astring avalue); void addinsertionlistener(in nsicontentfilter infilter); void align(in astring aalign); boolean breakisvisible(in nsidomnode anode); boolean candrag(in nsidomevent aevent); void checkselectionstateforanonymousbuttons(in nsiselection aselection); nsidomelement createanonymouselement(in astring atag, in nsidomnode aparentnode, in astring aanonclass, in boolean aiscreatedhidden); nsidomelement createelementwithdefaults(in astring atagname); void decreasefontsize(); void dodrag(in nsidomevent aevent); void getalignment(out boolean amixed, out short aalign); astring getbackgroundcolorstate(out boolean amixed); ...
... nsidomelement getelementorparentbytagname(in astring atagname, in nsidomnode anode); astring getfontcolorstate(out boolean amixed); astring getfontfacestate(out boolean amixed); astring getheadcontentsashtml(); astring gethighlightcolorstate(out boolean amixed); void getindentstate(out boolean acanindent, out boolean acanoutdent); void getinlineproperty(in nsiatom aproperty, in astring aattribute, in astring avalue, out boolean afirst, out boolean aany, out boolean aall); astring getinlinepropertywithattrvalue(in nsiatom aproperty, in astring aattribute, in astring avalue, out boolean afirst, out boolean aany, out boolean aall); nsisupportsarray getlinkedobjects(); void getlistitemstate(out boolean amixed, ou...
...t boolean ali, out boolean adt, out boolean add); void getliststate(out boolean amixed, out boolean aol, out boolean aul, out boolean adl); astring getparagraphstate(out boolean amixed); nsidomelement getselectedelement(in astring atagname); nsidomelement getselectioncontainer(); void ignorespuriousdragevent(in boolean aignorespuriousdragevent); void increasefontsize(); void indent(in astring aindent); void insertelementatselection(in nsidomelement aelement, in boolean adeleteselection); void insertfromdrop(in nsidomevent aevent); void inserthtml(in astring ainputstring); void inserthtmlwithcontext(in astring ainputstring, in astring acontextstr, in astring ainfostr, in astring aflavor, in nsidomdoc...
...And 32 more matches
Audio and Video Delivery - Developer guides
Web › Guide › Audio and video delivery
the audio and video elements whether we are dealing with pre-recorded audio files or live streams, the mechanism for making them available through the browser's <audio> and <video> elements remains pretty much the same.
...a <video> element, or document.createelement('video') perhaps?) deliver the media file to the player.
... for further info see <video> element and creating a cross-browser video player.
...And 32 more matches
JXON - Archive of obsolete content
Archive › JXON
the algorithms proposed here (see: #1, #2, #3, #4) will consider only the following types of nodes and their attributes: document (only as function argument), documentfragment (only as function argument), element, text (never as function argument), cdatasection (never as function argument), attr (never as function argument).
...the text content of each element is stored into the keyvalue property, while nodeattributes, if they exist, are listed under the child object keyattributes.
... the constructor's argument can be the entire xml document, a documentfragment or simply an element node.
...And 31 more matches
Microsummary XML grammar reference - Archive of obsolete content
Archive › Mozilla › Microsummary topics › XML grammar reference
warning: microsummary support was removed in gecko 6.0 (firefox 6.0 / thunderbird 6.0 / seamonkey 2.3) this article provides detailed information about the xml grammar used to build microsummary generators, describing each element and their attributes.
...hod="text"/> <template match="/"> <value-of select="id('download-count')"/> <text> fx downloads</text> </template> </transform> </template> <pages> <include>http://(www\.)?spreadfirefox\.com/(index\.php)?</include> </pages> </generator> namespace the namespace uri for microsummary generator xml documents is: http://www.mozilla.org/microsummaries/0.1 all elements in a microsummary generator document should be in this namespace except the descendants of the <template> element, which should be in the xslt namespace: http://www.w3.org/1999/xsl/transform the <generator> element the <generator> element is the root tag for all microsummary generators, and should contain the remainder of the xml code describing the generator.
... child elements: <template> (required) defines how to transform pages into their microsummaries.
...And 31 more matches
textbox (Toolkit autocomplete) - Archive of obsolete content
Archive › Mozilla › XUL › Textbox (Toolkit autocomplete)
« xul reference home [ examples | attributes | properties | methods | related ] this element is created by setting the type attribute of the textbox to autocomplete.
...this should be one of the characters that appears in the label attribute for the element.
... autocompletepopup type: id the id of a popup element used to hold autocomplete results for the element.
...And 31 more matches
Cascade and inheritance - Learn web development
Learn › CSS › Building blocks › Cascade and inheritance
at some point, you will be working on a project and you will find that the css you thought should be applied to an element is not working.
... usually the problem is that you have created two rules which could potentially apply to the same element.
...which rule is styling your element may not be the one you expect, so you need to understand how these mechanisms work.
...And 31 more matches
Manipulating documents - Learn web development
Learn › JavaScript › Client-side web APIs › Manipulating documents
you can use this object to return and manipulate information on the html and css that comprises the document, for example get a reference to an element in the dom, change its text content, apply new styles to it, create new elements and add them to the current element as children, or even delete it altogether.
...this is a "tree structure" representation created by the browser that enables the html structure to be easily accessed by programming languages — for example the browser itself uses it to apply styling and other information to the correct elements as it renders a page, and developers like you can manipulate the dom with javascript after the page has been rendered.
...try opening this up in your browser — it is a very simple page containing a <section> element inside which you can find an image, and a paragraph with a link inside.
...And 31 more matches
Traversing an HTML table with JavaScript and DOM Interfaces - Web APIs
Web › API › Document Object Model › Traversing an HTML table with JavaScript and DOM Interfaces
you will learn how to create, access and control, and remove html elements dynamically.
... example: creating an html table dynamically (sample1.html) html <input type="button" value="generate a table." onclick="generate_table()"> javascript function generate_table() { // get the reference for the body var body = document.getelementsbytagname("body")[0]; // creates a <table> element and a <tbody> element var tbl = document.createelement("table"); var tblbody = document.createelement("tbody"); // creating all cells for (var i = 0; i < 2; i++) { // creates a table row var row = document.createelement("tr"); for (var j = 0; j < 2; j++) { // create a <td> element and a text node, make the text ...
... // node the contents of the <td>, and put the <td> at // the end of the table row var cell = document.createelement("td"); var celltext = document.createtextnode("cell in row "+i+", column "+j); cell.appendchild(celltext); row.appendchild(cell); } // add the row to the end of the table body tblbody.appendchild(row); } // put the <tbody> in the <table> tbl.appendchild(tblbody); // appends <table> into <body> body.appendchild(tbl); // sets the border attribute of tbl to 2; tbl.setattribute("border", "2"); } note the order in which we created the elements and the text node: first we created the <table> element.
...And 31 more matches
Array - JavaScript
Web › JavaScript › Reference › Global Objects › Array
neither the length of a javascript array nor the types of its elements are fixed.
... arrays cannot use strings as element indexes (as in an associative array) but must use integers.
... setting or accessing via non-integers using bracket notation (or dot notation) will not set or retrieve an element from the array list itself, but will set or access a variable associated with that array's object property collection.
...And 31 more matches
Anonymous Content - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Anonymous Content
xbl content xbl can be used to automatically add a set of elements inside another element.
... the xul file only needs to specify the outer element while the inner elements are described in the xbl.
...mechanisms are provided for adding attributes to the inner elements that were specified on the outer element.
...And 30 more matches
Grids - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Grids
« previousnext » xul has a set of elements for creating tabular grids.
... xul tabular layout xul has a set of elements for doing layout of elements in a grid-like manner using the grid element.
...the grid does not display anything itself; it is used only to position elements in a tabular form with rows and columns.
...And 30 more matches
Modifying a XUL Interface - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Modifying a XUL Interface
creating new elements you can create new elements using the createelement() function of the document.
... it takes one argument, the tag name of the element to create.
... you can then set attributes of the element using the setattribute() function and append it to the xul document using the appendchild() function.
...And 30 more matches
button - Archive of obsolete content
Archive › Mozilla › XUL › button
this should be one of the characters that appears in the label attribute for the element.
...constants for the possible values for this attribute are in the nsidomxulbuttonelement interface.
... checked type: boolean indicates whether the element is checked or not.
...And 30 more matches
radio - Archive of obsolete content
Archive › Mozilla › XUL › radio
« xul reference home [ examples | attributes | properties | methods | related ] an element that can be turned on and off.
...this should be one of the characters that appears in the label attribute for the element.
... command type: id set to the id of a command element that is being observed by the element.
...And 30 more matches
Index - Learn web development
Learn › Index
css is what you use to selectively style html elements.
...html consists of a series of elements, which you use to enclose, or wrap, different parts of the content to make it appear a certain way, or act a certain way.
...the htmlmediaelement api makes a wealth of functionality available for creating simple video and audio players, and that's only the tip of the iceberg.
...And 30 more matches
HTML: A good basis for accessibility - Learn web development
Learn › Accessibility › HTML
previous overview: accessibility next a great deal of web content can be made accessible just by making sure the correct hypertext markup language elements are used for the correct purpose at all times.
...this means using the correct html elements for their intended purpose as much as possible.
...after all, you can use a combination of css and javascript to make just about any html element behave in whatever way you want.
...And 29 more matches
HTML: A good basis for accessibility - Learn web development
Learn › Accessibility › HTML?document saved=true
previous overview: accessibility next a great deal of web content can be made accessible just by making sure the correct hypertext markup language elements are used for the correct purpose at all times.
...this means using the correct html elements for their intended purpose as much as possible.
...after all, you can use a combination of css and javascript to make just about any html element behave in whatever way you want.
...And 29 more matches
HTML text fundamentals - Learn web development
Learn › HTML › Introduction to HTML › HTML text fundamentals
in html, each paragraph has to be wrapped in a <p> element, like so: <p>i am a paragraph, oh yes i am.</p> each heading has to be wrapped in a heading element: <h1>i am the title of the story.</h1> there are six heading elements: <h1>, <h2>, <h3>, <h4>, <h5>, and <h6>.
... each element represents a different level of content in the document; <h1> represents the main heading, <h2> represents subheadings, <h3> represents sub-subheadings, and so on.
... implementing structural hierarchy for example, in this story, the <h1> element represents the title of the story, the <h2> elements represent the title of each chapter, and the <h3> elements represent sub-sections of each chapter: <h1>the crushing bore</h1> <p>by chris mills</p> <h2>chapter 1: the dark night</h2> <p>it was a dark night.
...And 29 more matches
EventTarget.addEventListener() - Web APIs
Web › API › EventTarget › addEventListener
common targets are element, document, and window, but the target may be any object that supports events (such as xmlhttprequest).
...event bubbling and capturing are two ways of propagating events that occur in an element that is nested within another element, when both elements have registered a handle for that event.
... the event propagation mode determines the order in which elements receive the event.
...And 29 more matches
Content categories - Developer guides
Web › Guide › HTML › Content categories
every html element is a member of one or more content categories — these categories group elements that share common characteristics.
... this is a loose grouping (it doesn't actually create a relationship among elements of these categories), but they help define and describe the categories' shared behavior and their associated rules, especially when you come upon their intricate details.
... it's also possible for elements to not be a member of any of these categories.
...And 29 more matches
Layout System Overview - Archive of obsolete content
Archive › Mozilla › Firefox › Layout System Overview
this paged presentation presents several challenges not present in the galley presentation, namely how to break up elements that are larger than a single page, and how to handle changes to page dimensions.
...generally frames correspond to the content elements, though there is often a one-to-many correspondence between content elements and frames.
... layout creates frames for content based on either the specific html rules for an element or based on the css display type of the element.
...And 28 more matches
toolbarbutton - Archive of obsolete content
Archive › Mozilla › XUL › toolbarbutton
this should be one of the characters that appears in the label attribute for the element.
...constants for the possible values for this attribute are in the nsidomxulbuttonelement interface.
... checked type: boolean indicates whether the element is checked or not.
...And 28 more matches
How to structure a web form - Learn web development
Learn › Forms › How to structure a web form
previous overview: forms next with the basics out of the way, we'll now look in more detail at the elements used to provide structure and meaning to the different parts of a form.
... the flexibility of forms makes them one of the most complex structures in html; you can build any kind of basic form using dedicated form elements and attributes.
... the <form> element the <form> element formally defines a form and attributes that determine the form's behavior.
...And 28 more matches
XForms Accessibility
Mozilla › Tech › Accessibility › XForms
implementation of accessible objects for xforms elements is based on top of the existing object hierarchy introduced in the mozilla accessibility module.
... xforms elements behavior is implemented in accordance with accessible toolkit checklist.
... in general, when elements are similar to html elements, they are exposed to msaa/atk in a similar way.
...And 28 more matches
Introduction to the DOM - Web APIs
Web › API › Document Object Model › Introduction
for example, the standard dom specifies that the getelementsbytagname method in the code below must return a list of all the <p> elements in the document: const paragraphs = document.getelementsbytagname("p"); // paragraphs[0] is the first <p> element // paragraphs[1] is the second <p> element, etc.
... alert(paragraphs[0].nodename); all of the properties, methods, and events available for manipulating and creating web pages are organized into objects (for example, the document object that represents the document itself, the table object that implements the special htmltableelement dom interface for accessing html tables, and so forth).
...that is to say, it's written in javascript, but it uses the dom to access the document and its elements.
...And 28 more matches
Using files from web applications - Web APIs
Web › API › File › Using files from web applications
this selection can be done by either using an html <input type="file"> element or by drag and drop.
... the multiple attribute on the input element allows the user to select multiple files.
... accessing the first selected file using a classical dom selector: const selectedfile = document.getelementbyid('input').files[0]; accessing selected file(s) on a change event it is also possible (but not mandatory) to access the filelist through the change event.
...And 28 more matches
The Box Model - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › The Box Model
this is the system that determines how all elements are laid out visually in a xul document.
... any xul interface can be broken down into the following basic components: boxes text images alignment and flexibility widths and heights margins and paddings menus, toolbar buttons, and even the most complex elements in xul are composed of these simple ingredients.
... complex elements are created from simpler ones through xbl, which will be covered later on.
...And 27 more matches
tab - Archive of obsolete content
Archive › Mozilla › XUL › tab
« xul reference home [ examples | attributes | properties | methods | related ] a single tab which should be placed inside a tabs element.
...this should be one of the characters that appears in the label attribute for the element.
... crop type: one of the values below if the label of the element is too big to fit in its given space, the text will be cropped on the side specified by the crop attribute.
...And 27 more matches
tree - Archive of obsolete content
Archive › Mozilla › XUL › tree
« xul reference home [ examples | attributes | properties | methods | related ] a container which can be used to hold a tabular or hierarchical set of rows of elements.
...unlike other elements, the data to display inside the tree is not specified using tags, but is determined from a view object.
...the third column indicates whether treeitem element are used.
...And 27 more matches
Mozilla XForms User Interface - Archive of obsolete content
Archive › Web › XForms › User Interface Elements
introduction this article is a quick reference of the xforms user interface elements.
... mainly this is aimed to document how xforms elements will be presented in mozilla since the xforms specifications give only a hint of how controls might be rendered.
...the xforms specs define two kinds of xforms ui elements, called 'form controls' and 'xforms user interface'.
...And 27 more matches
Basic native form controls - Learn web development
Learn › Forms › Basic native form controls
previous overview: forms next in the previous article, we marked up a functional web form example, introducing some form controls and common structural elements, and focusing on accessibility best practices.
... you've already met some form elements, including <form>, <fieldset>, <legend>, <textarea>, <label>, <button>, and <input>.
...if you want a more advanced reference, you should consult our html forms element reference, and in particular our extensive <input> types reference.
...And 27 more matches
nsIDOMWindowUtils
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMWindowUtils
to get this interface, use: var domwindowutils = window.windowutils; method overview void activatenativemenuitemat(in astring indexstring); void clearmozafterpaintevents(); pruint32 comparecanvases(in nsidomhtmlcanvaselement acanvas1, in nsidomhtmlcanvaselement acanvas2, out unsigned long amaxdifference); double computeanimationdistance(in nsidomelement element, in astring property, in astring value1, in astring value2); nsicompositionstringsynthesizer createcompositionstringsynthesizer(); obsolete since gecko 38.0 void disablenontestmouseevents(in boolean adisable); boolean di...
...spatchdomeventviapresshell(in nsidomnode atarget, in nsidomevent aevent, in boolean atrusted); nsidomelement elementfrompoint(in float ax, in float ay, in boolean aignorerootscrollframe, in boolean aflushlayout); void entermodalstate(); nsidomelement findelementwithviewid(in nsviewid aid); void focus(in nsidomelement aelement); void forceupdatenativemenuat(in astring indexstring); void garbagecollect([optional] in nsicyclecollectorlistener alistener); short getcursortype(); astring getdocumentmetadata(in astring aname); nsidomwindow getouterwindowwithid(in unsigned long long aouterwindowid); long getpccountscriptcount(); astring getpccountscriptsummary(in long ascript); astri...
...ng getpccountscriptcontents(in long ascript); void getscrollxy(in boolean aflushlayout, out long ascrollx, out long ascrolly); astring getvisiteddependentcomputedstyle(in nsidomelement aelement, in astring apseudoelement, in astring apropertyname); boolean isinmodalstate(); void leavemodalstate(); void loadsheet(in nsiuri sheeturi, in unsigned long type); nsidomnodelist nodesfromrect(in float ax, in float ay, in float atopsize, in float arightsize, in float abottomsize, in float aleftsize, in boolean aignorerootscrollframe, in boolean aflushlayout); void processupdates(); obsolete since gecko 13.0 void purgepccounts(); unsigned long redraw([optional] in unsigned long acount); void renderdocumen...
...And 27 more matches
Keyboard-navigable JavaScript widgets - Accessibility
Web › Accessibility › Keyboard-navigable JavaScript widgets
these widgets are typically composed of <div> and <span> elements that do not, by nature, offer the same keyboard functionality that their desktop counterparts do.
... using tabindex by default, when people use the tab key to browse a webpage, only interactive elements (like links, form controls) get focused.
... with the tabindex global attribute, authors can make other elements focusable, too.
...And 27 more matches
Block and inline layout in normal flow - CSS: Cascading Style Sheets
Web › CSS › CSS Flow Layout › Block and Inline Layout in Normal Flow
in this guide, we will explore the basics of how block and inline elements behave when they are part of the normal flow.
... the behaviour of elements which have a block or inline formatting context is also defined in this specification.
... for elements with a block formatting context, the spec says: “in a block formatting context, boxes are laid out one after the other, vertically, beginning at the top of a containing block.
...And 27 more matches
Namespaces crash course - SVG: Scalable Vector Graphics
Web › SVG › Namespaces Crash Course
naturally, each xml dialect defines the meaning of the markup element names described in its specification.
... the problem with mixing content from different xml dialects in a single xml document is that the elements defined by one dialect may have the same name as elements defined by another.
... for example, both xhtml and svg have a <title> element.
...And 27 more matches
Binding Attachment and Detachment - Archive of obsolete content
Archive › Mozilla › XBL › XBL 1.0 Reference › Binding Attachment and Detachment
attachment using css bindings can be attached to elements through css using the -moz-binding property.
... -moz-binding value: none | [,]* <uri> | inherit initial value: none applies to: all elements (not generated content or pseudo-elements) inherited: no percentages: n/a the value of the -moz-binding property is a set of urls that identify specific bindings.
... in the following example, a binding is referenced that will be attached to all html checkbox elements.
...And 26 more matches
radiogroup - Archive of obsolete content
Archive › Mozilla › XUL › radiogroup
attributes disabled, focused, preference, tabindex, value properties accessibletype, disabled, focuseditem, itemcount, selectedindex, selecteditem, tabindex, value methods appenditem, checkadjacentelement, getindexofitem, getitematindex, insertitemat, removeitemat examples <radiogroup> <radio id="orange" label="red"/> <radio id="violet" label="green" selected="true"/> <radio id="yellow" label="blue"/> </radiogroup> attributes disabled type: boolean indicates whether the element is disabled or not.
... if this attribute is set, the element is disabled.
... disabled elements are usually drawn with grayed-out text.
...And 26 more matches
Accessibility API cross-reference
Mozilla › Accessibility › Accessibility API cross-reference
the roles it specifies have already informed the 'semantic elements' of html5 (such as main and footer), but there is not a one-to-one mapping between the aria roles and the semantics of html5.
... aria can be used to 'fill out' the missing semantics of html, but may also be used in other markup languages (such as svg) and expresses semantics using attributes, compared with html, which tends to have distinct named elements for its roles.
... banner a portion of quoted content which is 'too long' to appear 'inline' n/a blockquote <blockquote> entire window border as 1 object border n/a n/a n/a specific kind of button that drops down a list of items, msaa only buttondropdown n/a n/a expressed with aria-haspopup on an element with a button role specific kind of button that drops down a grid, msaa only buttondropdowngrid n/a n/a specific kind of button that drops down a menu, msaa only buttonmenu n/a n/a expressed with aria-haspopup on an element with a button role represents the system's caret caret n/a n/a ...
...And 26 more matches
Fullscreen API - Web APIs
Web › API › Fullscreen API
the fullscreen api adds methods to present a specific element (and its descendants) in full-screen mode, and to exit full-screen mode once it is no longer needed.
... this makes it possible to present desired content—such as an online game—using the user's entire screen, removing all browser user interface elements and other applications from the screen until full-screen mode is shut off.
... methods the fullscreen api adds methods to the document and element interfaces to allow turning off and on full-screen mode.
...And 26 more matches
<textarea> - HTML: Hypertext Markup Language
Web › HTML › Element › textarea
the html <textarea> element represents a multi-line plain-text editing control, useful when you want to allow users to enter a sizeable amount of free-form text, for example a comment on a review or feedback form.
... the above example demonstrates a number of features of <textarea>: an id attribute to allow the <textarea> to be associated with a <label> element for accessibility purposes a name attribute to set the name of the associated data point submitted to the server when the form is submitted.
... the <textarea> element also accepts several attributes common to form <input>s, such as autocomplete, autofocus, disabled, placeholder, readonly, and required.
...And 26 more matches
preserveAspectRatio - SVG: Scalable Vector Graphics
Web › SVG › Attribute › preserveAspectRatio
the preserveaspectratio attribute indicates how an element with a viewbox providing a given aspect ratio must fit into a viewport with a different aspect ratio.
... because the aspect ratio of an svg image is defined by the viewbox attribute, if this attribute isn't set, the preserveaspectratio attribute has no effect (with one exception, the <image> element, as described below).
...scale the graphic content of the given element non-uniformly if necessary such that the element's bounding box exactly matches the viewport rectangle.
...And 26 more matches
Using Remote XUL - Archive of obsolete content
Archive › Mozilla › XUL › Using Remote XUL
it contains elements for all common ui widgets (menus, buttons, toolbars, etc.) and many sophisticated ones (trees, browsers, color pickers).
... <?xml version="1.0"?> <window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" /> a xul document requires only two entities to be valid, an xml processing instruction on the first line that identifies the file as xml, and a window element that defines a xul application window (or in this case web page).
...the window element is the root (outermost) element in a xul document and encompasses all other elements.
...And 25 more matches
The stacking context - CSS: Cascading Style Sheets
Web › CSS › CSS Positioning › Understanding z index › The stacking context
the stacking context is a three-dimensional conceptualization of html elements along an imaginary z-axis relative to the user, who is assumed to be facing the viewport or the webpage.
... html elements occupy this space in priority order based on element attributes.
... the stacking context in the previous part of this article, using z-index, the rendering order of certain elements is influenced by their z-index value.
...And 25 more matches
CSS selectors - CSS: Cascading Style Sheets
Web › CSS › CSS Selectors
css selectors define the elements to which a set of css rules apply.
... basic selectors universal selector selects all elements.
... syntax: * ns|* *|* example: * will match all the elements of the document.
...And 25 more matches
<transform-function> - CSS: Cascading Style Sheets
Web › CSS › transform-function
the <transform-function> css data type represents a transformation that affects an element's appearance.
... transformation functions can rotate, resize, distort, or move an element in 2d or 3d space.
... rotation rotate() rotates an element around a fixed point on the 2d plane.
...And 25 more matches
Template Logging - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Template Logging
<vbox datasources="..." flags="logging"/> the flags attribute on the root element of the template should include the logging flag.
...however, calling getelementbyid using this id will retrieve the generated content for that result if you want to further study the content that was generated.
...this indicates that the result is for the second <query> element.
...And 24 more matches
Trees - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Trees
the tree one of the more complex elements in xul is the tree.
... the set of columns is defined by a number of treecol elements, one for each column.
...this is because there are no elements that display the individual cells, like there is with the listbox.
...And 24 more matches
tabs - Archive of obsolete content
Archive › Mozilla › XUL › tabs
a tabs element should be placed inside a tabbox and should contain tab elements.
... nb: you can add some other elements to tabs such as button, but they will receive an index.
... disabled type: boolean indicates whether the element is disabled or not.
...And 24 more matches
UI pseudo-classes - Learn web development
Learn › Forms › UI pseudo-classes
prerequisites: basic computer literacy, and a basic understanding of html and css, including general knowledge of pseudo-classes and pseudo-elements.
... the original pseudo-classes available to us (as of css 2.1) that are relevant to forms are: :hover: selects an element only when it is being hovered over by a mouse pointer.
... :focus: selects an element only when it is focused (i.e.
...And 24 more matches
inIDOMUtils
Mozilla › Tech › XPCOM › Reference › Interface › inIDOMUtils
inherits from: nsisupports last changed in gecko 22.0 (firefox 22.0 / thunderbird 22.0 / seamonkey 2.19) implemented by: @mozilla.org/inspector/dom-utils;1 as a service: var inidomutils = components.classes["@mozilla.org/inspector/dom-utils;1"] .getservice(components.interfaces.inidomutils); method overview void addpseudoclasslock(in nsidomelement aelement, in domstring apseudoclass); void clearpseudoclasslocks(in nsidomelement aelement); [implicit_jscontext] jsval colornametorgb(in domstring acolorname); nsiarray getbindingurls(in nsidomelement aelement); nsidomnodelist getchildrenfornode(in nsidomnode anode, in boolean ashowinganonymouscontent); unsigned long long getcontentstate(in nsidomele...
...ment aelement); void getcsspropertynames([optional] in unsigned long aflags, [optional] out unsigned long acount, [retval, array, size_is(acount)] out wstring aprops); nsisupportsarray getcssstylerules(in nsidomelement aelement, [optional] in domstring apseudo); nsidomnode getparentfornode(in nsidomnode anode, in boolean ashowinganonymouscontent); unsigned long getruleline(in nsidomcssstylerule arule); unsigned long getrulecolumn(in nsidomcssstylerule arule); unsigned long getselectorcount(in nsidomcssstylerule arule); astring getselectortext(in nsidomcssstylerule arule, in unsigned long aselectorindex); unsigned long long getspecificity(in nsidomcssstylerule arule, in unsigned long aselectorindex); nsidomfontfaceli...
...st getusedfontfaces(in nsidomrange arange); bool haspseudoclasslock(in nsidomelement aelement, in domstring apseudoclass); boolean isignorablewhitespace(in nsidomcharacterdata adatanode); bool isinheritedproperty(in astring apropertyname); void parsestylesheet(in nsidomcssstylesheet asheet, in domstring ainput); void removepseudoclasslock(in nsidomelement aelement, in domstring apseudoclass); astring rgbtocolorname(in octet ar, in octet ag, in octet ab); bool selectormatcheselement(in nsidomelement aelement, in nsidomcssstylerule arule, in unsigned long aselectorindex, [optional] in domstring apseudo); void setcontentstate(in nsidomelement aelement, in unsigned long long astate); constants constant value...
...And 24 more matches
Using images - Web APIs
Web › API › Canvas API › Tutorial › Using images
you can even use the image produced by other canvas elements on the same page as the source!
... importing images into a canvas is basically a two step process: get a reference to an htmlimageelement object or to another canvas element as a source.
... getting images to draw the canvas api is able to use any of the following data types as an image source: htmlimageelement these are images created using the image() constructor, as well as any <img> element.
...And 24 more matches
Microdata DOM API - Web APIs
Web › API › Microdata DOM API
each item is represented in the dom by the element on which the relevant itemscope attribute is found.
... these elements have their element.itemscope idl attribute set to true.
... the type(s) of items can be obtained using the element.itemtype idl attribute on the element with the itemscope attribute.
...And 24 more matches
Pointer events - Web APIs
Web › API › Pointer events
additionally, a pointer event contains the usual properties present in mouse events (client coordinates, target element, button states, etc.) in addition to new properties for other forms of input: pressure, contact geometry, tilt, etc.
... hit test the process the browser uses to determine a target element for a pointer event.
... typically, this is determined by considering the pointer's location and also the visual layout of elements in a document on screen media.
...And 24 more matches
Box-shadow generator - CSS: Cascading Style Sheets
Web › CSS › CSS Background and Borders › Box-shadow generator
n"> <div class="button" data-type="add"> </div> <div class="button" data-type="move-up"> </div> <div class="button" data-type="move-down"> </div> </div> <div id="stack_container"></div> </div> <div id="preview_zone"> <div id="layer_menu" class="col span_12"> <div class="button" id="element" data-type="subject" data-title="element"> element </div> <div class="button" id="before" data-type="subject" data-title=":before"> :before <span class="delete" data-type="disable"></span> </div> <div class="button" id="after" data-type="subject" data-title=":after"> :after ...
... <span class="delete" data-type="disable"></span> </div> <div class="ui-checkbox" data-topic='before' data-label=":before"></div> <div class="ui-checkbox" data-topic='after' data-label=":after"></div> </div> <div id="preview"> <div id="obj-element"> <div class="content"> </div> <div id="obj-before"> </div> <div id="obj-after"> </div> </div> </div> </div> </div> <div id="controls" class="group section"> <div class="wrap-left"> <div class="colorpicker category"> <div class="title"> </div> <div id="colorpicker" class="group"> <div id="...
... data-min="-100" data-max="100" data-step="1" data-value="50"> </div> <div class="ui-slider-btn-set" data-topic="spread" data-type="add"></div> <div class="ui-slider-input" data-topic="spread" data-unit="px"></div> </div> </div> </div> <div id="element_properties" class="category"> <div class="title"> class element properties </div> <div class="group"> <div class="group property"> <div class="ui-slider-name"> border </div> <div class="ui-checkbox" data-topic='border-state' data-state="true"></div> </div> <d...
...And 24 more matches
Chapter 5: Let's build a Firefox extension - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › Firefox addons developer guide › Let's build a Firefox extension
“chrome”is the word used to describe all the gui structural elements that go into an xul application.
... the skin package this is used to include source files used as visual elements in the gui, including style sheets and images.
... click the spots numbered 1 and 2 in figure 5, in that order; the menu element (3) will then be selected.
...And 23 more matches
The Essentials of an Extension - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › The Essentials of an Extension
the chrome.manifest file chrome is the set of user interface elements of the application window that are outside of a window's content area.
... toolbars, menu bars, progress bars, and window title bars are all examples of elements that are typically part of the chrome.
... xul files are xml files that define the user interface elements in firefox and firefox extensions.
...And 23 more matches
Menus - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › Menus
there are four elements that a menupopup can be attached to.
... in each case, the menupopup element is placed as a direct child of the element.
... the following is a brief summary of these elements, examples of each will be provided later.
...And 23 more matches
Adding Event Handlers - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Adding Event Handlers
you can use the script element to include scripts in xul files.
...add the line below just after the opening window tag and before any elements.
...each xul element has the ability to trigger certain events in different situations.
...And 23 more matches
Skinning XUL Files by Hand - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Skinning XUL Files by Hand
following the instructions here, you are going to create a skin for a xul file and apply it by specifying classes for all of the interested elements.
...as you will see, css provides a lot of flexibility for defining styles to individual elements, to classes of elements, to pseudo-classes, and to anonymous classes.
... much of what makes xul look (and act!) the way it does comes from the css for each xul element.
...And 23 more matches
Introduction to events - Learn web development
Learn › JavaScript › Building blocks › Events
in the case of the web, events are fired inside the browser window, and tend to be attached to a specific item that resides in it — this might be a single element, set of elements, the html document loaded in the current tab, or the entire browser window.
...for example: the user selects a certain element or hovers the cursor over a certain element.
...the btn constant points to a <button> element, and this type of object has a number of events that can fire on it, and therefore, event handlers available.
...And 23 more matches
<input type="image"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › image
<input> elements of type image are used to create graphical submit buttons, i.e.
... value <input type="image"> elements do not accept value attributes.
... additional attributes in addition to the attributes shared by all <input> elements, image button inputs support the following attributes: attribute description alt alternate string to display when the image can't be shown formaction the url to which to submit the data formenctype the encoding method to use when submitting the form data formmethod the http method to use when submitting the form formnovalidate a boolean which, if present, indicates that the form shouldn't be validated before submission formtarget a string indicating a browsing context from where to load the results of submitting the form height the height, i...
...And 23 more matches
XUL Event Propagation - Archive of obsolete content
Archive › Mozilla › XUL › XUL event propagation
this button responds to the user action by raising an event, a message meant to travel from one element within the interface to another.
... in this case, the event raised was the "click" event, but a variety of events can be raised by the button element.
...and sometimes elements raise different events for the pressing down of the click and the release.
...And 22 more matches
label - Archive of obsolete content
Archive › Mozilla › XUL › label
« xul reference home [ examples | attributes | properties | methods | related ] this element is used to provide a label for a control element.
...this should be one of the characters that appears in the label attribute for the element.
... control type: id this attribute specifies the id of the element with which the label is associated.
...And 22 more matches
preference - Archive of obsolete content
Archive › Mozilla › XUL › preference
this element must be placed inside a preferences element.
... each preference element corresponds to a preference which is stored in the user's preferences file.
... you can connect a user interface element such as a checkbox to a preference element using the user interface element's preference attribute.
...And 22 more matches
richlistitem - Archive of obsolete content
Archive › Mozilla › XUL › richlistitem
attributes disabled, searchlabel, selected, tabindex, value properties accessible, control, disabled, label, selected, tabindex, value examples (example needed) attributes disabled type: boolean indicates whether the element is disabled or not.
... if this attribute is set, the element is disabled.
... disabled elements are usually drawn with grayed-out text.
...And 22 more matches
tabbrowser - Archive of obsolete content
Archive › Mozilla › XUL › tabbrowser
« xul reference home [ examples | attributes | properties | methods | related ] this element is used for holding a set of read-only views of web documents.
... it is similar to the browser element, except that multiple documents can be displayed, each in a separate tab.
... autocompletepopup type: id the id of a popup element used to hold autocomplete results for the element.
...And 22 more matches
Advanced text formatting - Learn web development
Learn › HTML › Introduction to HTML › Advanced text formatting
previous overview: introduction to html next there are many other elements in html for formatting text, which we didn't get to in the html text fundamentals article.
... the elements described in this article are less known, but still useful to know about (and this is still not a complete list by any means).
... objective: to learn how to use lesser-known html elements to mark up advanced semantic features.
...And 22 more matches
Video and Audio APIs - Learn web development
Learn › JavaScript › Client-side web APIs › Video and audio APIs
previous overview: client-side web apis next html5 comes with elements for embedding rich media in documents — <video> and <audio> — which in turn come with their own apis for controlling playback, seeking, etc.
... html5 video and audio the <video> and <audio> elements allow us to embed video and audio into web pages.
... the htmlmediaelement api part of the html5 spec, the htmlmediaelement api provides features to allow you to control video and audio players programmatically — for example htmlmediaelement.play(), htmlmediaelement.pause(), etc.
...And 22 more matches
Handling common accessibility problems - Learn web development
Learn › Tools and testing › Cross browser testing › Accessibility
html semantic html (where the elements are used for their correct purpose) is accessible right out of the box — such content is readable by sighted viewers (provided you don't do anything silly like make the text way too small or hide it using css), but will also be usable by assistive technologies like screen readers (apps that literally read out a web page to their user), and confer other advantages too.
...the elements that have this capability are the common ones that allow user to interact with web pages, namely links, <button>s, and form elements like <input>.
... you can try this out using our native-keyboard-accessibility.html example (see the source code) — open this in a new tab, and try pressing the tab key; after a few presses, you should see the tab focus start to move through the different focusable elements; the focused elements are given a highlighted default style in every browser (it differs slightly between different browsers) so that you can tell what element is focused.
...And 22 more matches
Visual formatting model - CSS: Cascading Style Sheets
Web › CSS › Visual formatting model
in the visual formatting model, each element in the document tree generates zero or more boxes according to the box model.
... relationships between elements in the document tree.
... box generation box generation is the part of the css visual formatting model that creates boxes from the document's elements.
...And 22 more matches
pointer-events - CSS: Cascading Style Sheets
Web › CSS › pointer-events
the pointer-events css property sets under what circumstances (if any) a particular graphic element can become the target of pointer events.
... values auto the element behaves as it would if the pointer-events property were not specified.
... none the element is never the target of pointer events; however, pointer events may target its descendant elements if those descendants have pointer-events set to some other value.
...And 22 more matches
Creating a cross-browser video player - Developer guides
Web › Guide › Audio and video delivery › cross browser video player
the video first of all the <video> element is defined, contained within a <figure> element that acts as the video container.
... to anyone familiar with html5 markup and the <video> element, there should be nothing here that surprises you.
...from the link below" /> </object> <!-- offer download --> <a href="video/tears-of-steel-battle-clip-medium.mp4">download mp4</a> </video> <figcaption>&copy; blender foundation | <a href="http://mango.blender.org">mango.blender.org</a></figcaption> </figure> even though this player will define its own custom control set, the controls attribute is still added to the <video> element, and the player's default control set is switched off later with javascript.
...And 22 more matches
Binding Implementations - Archive of obsolete content
Archive › Mozilla › XBL › XBL 1.0 Reference › Binding Implementations
introduction bindings can define methods and properties on a bound element using the implementation tag.
... a binding implementation provides a new set of methods and properties that can be invoked directly from the bound element.
...when the src attribute is specified, any children of the implementation element are ignored.
...And 21 more matches
checkbox - Archive of obsolete content
Archive › Mozilla › XUL › checkbox
« xul reference home [ examples | attributes | properties | methods | related ] an element that can be turned on and off.
... this is most commonly rendered as a box when the element is off and a box with a check when the element is on.
...this should be one of the characters that appears in the label attribute for the element.
...And 21 more matches
key - Archive of obsolete content
Archive › Mozilla › XUL › key
« xul reference home [ examples | attributes | properties | methods | related ] the key element defines a window-global keyboard shortcut and must be placed inside a keyset element.
... when a key matching the attributes on the key element is pressed, the command will be fired on the key element.
... the key pressed must match the key attribute (or keycode attribute) as well as the modifiers attribute in order for the key element to be activated.
...And 21 more matches
Other form controls - Learn web development
Learn › Forms › Other form controls
previous overview: forms next we now look at the functionality of non-<input> form elements in detail, from other control types such as drop-down lists and multi-line text fields, to other useful form features such as the <output> element (which we saw in action in the previous article), and progress bars.
... multi-line text fields a multi-line text field is specified using a <textarea> element, rather than using the <input> element.
...in contrast, the <input> is an empty element with no closing tag — any default value is put inside the value attribute.
...And 21 more matches
Drawing graphics - Learn web development
Learn › JavaScript › Client-side web APIs › Drawing graphics
previous overview: client-side web apis next the browser contains some very powerful graphics programming tools, from the scalable vector graphics (svg) language, to apis for drawing on html <canvas> elements, (see the canvas api and webgl).
... prerequisites: javascript basics (see first steps, building blocks, javascript objects), the basics of client-side apis objective: to learn the basics of drawing on <canvas> elements using javascript.
... graphics on the web as we talked about in our html multimedia and embedding module, the web was originally just text, which was very boring, so images were introduced — first via the <img> element and later via css properties such as background-image, and svg.
...And 21 more matches
ARIA: button role - Accessibility
Web › Accessibility › ARIA › Roles › button role
the button role should be used for clickable elements that trigger a response when activated by the user.
... adding role="button" will make an element appear as a button control to a screen reader.
... <div id="savechanges" tabindex="0" role="button" aria-pressed="false">save</div> the above example creates a simple button which is first in the focus order, though <button> or <input> with type="button" should be used for buttons: <button id="savechanges">save</button> note: if using role="button" instead of the semantic <button> or <input type="button"> elements, you will need to make the element focusable and have to define event handlers for click and keydown events, including the enter and space keys, in order to process the user's input.
...And 21 more matches
Constraint validation - Developer guides
Web › Guide › HTML › HTML5 › Constraint validation
html5 introduced new mechanisms for forms: it added new semantic types for the <input> element and constraint validation to ease the work of checking the form content on the client side.
... intrinsic and basic constraints in html5, basic constraints are declared in two ways: by choosing the most semantically appropriate value for the type attribute of the <input> element, e.g., choosing the email type automatically creates a constraint that checks whether the value is a valid e-mail address.
...er a valid number the value must be less than or equal to the value rangeoverflow constraint violation date, month, week a valid date datetime, datetime-local, time a valid date and time required text, search, url, tel, email, password, date, datetime, datetime-local, month, week, time, number, checkbox, radio, file; also on the <select> and <textarea> elements none as it is a boolean attribute: its presence means true, its absence means false there must be a value (if set).
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TypedArray - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray
instead, there are a number of different global properties, whose values are typed array constructors for specific element types, listed below.
... on the following pages you will find common properties and methods that can be used with any typed array containing elements of any type.
... parameters length when called with a length argument, an internal array buffer is created in memory, of size length multiplied by bytes_per_element bytes, containing zeros.
...And 21 more matches
StringView - Archive of obsolete content
Archive › Add-ons › Code snippets › StringView library
(nfrstchr - 0xd800 /* 55296 */ << 10) + achars[nidx + 1] + 0x2400 /* 9216 */ : nfrstchr; }; stringview.pututf16charcode = function (atarget, nchar, nputat) { var nidx = nputat; if (nchar < 0x10000 /* 65536 */) { /* one element */ atarget[nidx++] = nchar; } else { /* two elements */ atarget[nidx++] = 0xd7c0 /* 55232 */ + (nchar >>> 10); atarget[nidx++] = 0xdc00 /* 56320 */ + (nchar & 0x3ff /* 1023 */); } return nidx; }; stringview.getutf16charlength = function (nchar) { return nchar < 0x10000 ?
... startoffset optional a number expressing: the start offset of the new stringview in bytes if the input argument is an arraybuffer the start offset of the new stringview in raw elements if the input argument is a typed array or other ordered object the start offset of the new stringview in codepoints if the input argument is a stringview or a string if not specified (or specified as null) it will default to 0.
... length optional a number expressing in codepoints the length of the new stringview if the input argument is a string or a stringview, or in raw elements if the input is a typed array, an arraybuffer or any other kind of ordered object (like array, collections, etc.).
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Adding Events and Commands - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › Adding Events and Commands
« previousnext » event handlers just like with html, most javascript code execution is triggered by event handlers attached to dom elements.
...also, note that the addeventlistener method receives the event name without the "on" prefix, while element attributes do have the prefix.
...elements only implement the events that are relevant to them, but there are several events that are implemented for most elements.
...And 20 more matches
ContextMenus - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › ContextMenus
a typical usage is for the user to right-click on an element to display a menu of commands pertaining to what was clicked on.
...the most common is by clicking on an element with the right mouse button.
... when using the mouse to open a context menu, the context is the element that was clicked.
...And 20 more matches
More Event Handlers - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › More Event Handlers
it holds a reference to the element where the event occurred.
... a similar property currenttarget holds the element that is currently having its event listeners handled.
... in the example below, currenttarget is always the vbox, whereas target would be the specific element, either the button or checkbox, that was activated.
...And 20 more matches
Stacks and Decks - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Stacks and Decks
« previousnext » there may be need to display elements as a set of overlapping cards.
... the stack and deck elements can be used for this purpose.
... containers each xul box is a container that can contain any other element.
...And 20 more matches
The Box Model - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › The Box Model
elements inside of a box will orient themselves horizontally or vertically.
... by combining a series of boxes, spacers and elements with flex and pack attributes, you can control the layout of a window.
... although a box is the fundamental part of xul element layout, it follows a few very simple rules.
...And 20 more matches
Using the W3C DOM - Archive of obsolete content
Archive › Using Web Standards in your Web Pages › Using the W3C DOM
« previousnext » the document object has properties for accessing collections of elements, such as document.images and document.forms.
... the w3c document object model provides interfaces dom elements to scriptable objects.
... accessing elements with the w3c dom the basic method for referencing elements in an html page is document.getelementbyid().
...And 20 more matches
Getting started with CSS - Learn web development
Learn › CSS › First steps › Getting started
in the text is a <span>span element</span> and also a <a href="http://example.com">link</a>.</p> <p>this is the second paragraph.
... it contains an <em>emphasized</em> element.</p> <ul> <li>item one</li> <li>item two</li> <li>item <em>three</em></li> </ul> </body> </html> note: if you are reading this on a device or an environment where you can't easily create files, then don't worry — live code editors are provided below to allow you to write example code right here in the page.
... to link styles.css to index.html add the following line somewhere inside the <head> of the html document: <link rel="stylesheet" href="styles.css"> this <link> element tells the browser that we have a stylesheet, using the rel attribute, and the location of that stylesheet as the value of the href attribute.
...And 20 more matches
CSS FAQ - Learn web development
Learn › CSS › Howto › CSS FAQ
html elements can have an id and/or class attribute.
... the id attribute assigns a name to the element it is applied to, and for valid markup, there can be only one element with that name.
... the class attribute assigns a class name to the element, and that name can be used on many elements within the page.
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Fundamental text and font styling - Learn web development
Learn › CSS › Styling text › Fundamentals
as you'll have already experienced in your work with html and css, text inside an element is laid out inside the element's content box.
...text content effectively behaves like a series of inline elements, being laid out on lines adjacent to one another, and not creating line breaks until the end of the line is reached, or unless you force a line break manually using the <br> element.
... note: bear in mind that the text inside an element is all affected as one single entity.
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Your first form - Learn web development
Learn › Forms › Your first form
overview: forms next the first article in our series provides you with your very first experience of creating a web form, including designing a simple form, implementing it using the right html form controls and other html elements, adding some very simple styling via css, and describing how data is sent to a server.
... objective: to gain familiarity with what web forms are, what they are used for, how to think about designing them, and the basic html elements you'll need for simple cases.
... a web form's html is made up of one or more form controls (sometimes called widgets), plus some additional elements to help structure the overall form — they are often referred to as html forms.
...And 20 more matches
nsIMutableArray
Mozilla › Tech › XPCOM › Reference › Interface › nsIMutableArray
as above, it is legal to add null elements to the array.
... note also that null elements can be created as a side effect of insertelementat().
... conversely, if insertelementat() is never used, and null elements are never explicitly added to the array, then it is guaranteed that nsiarray.queryelementat() will never return a null value.
...And 20 more matches
ARIA: tab role - Accessibility
Web › Accessibility › ARIA › Roles › Tab Role
the aria tab role indicates an interactive element inside a tablist that, when activated, displays its associated tabpanel.
... <button role="tab" aria-selected="true" aria-controls="tabpanel-id" id="tab-id">tab label</button> description an element with the tab role controls the visibility of an associated element with the tabpanel role.
... elements with the role tab must either be a child of an element with the tablist role, or have their id part of the aria-owns property of a tablist.
...And 20 more matches
Color picker tool - CSS: Cascading Style Sheets
Web › CSS › CSS Colors › Color picker tool
0; top: -10000px; left: 0; color: #777; float: left; transition: opacity 1s; } #zindex input { border: 1px solid #ddd; font-size: 16px; color: #777; } #zindex .ui-input-slider-info { width: 60px; } #zindex[data-active='true'] { top: 0; opacity: 1; } javascript content 'use strict'; var uicolorpicker = (function uicolorpicker() { function getelembyid(id) { return document.getelementbyid(id); } var subscribers = []; var pickers = []; /** * rgba color class * * hsv/hsb and hsl (hue, saturation, value / brightness, lightness) * @param hue 0-360 * @param saturation 0-100 * @param value 0-100 * @param lightness 0-100 */ function color(color) { if(color instanceof color === true) { this.copy(color); return; } this.r = 0; this.g = 0; t...
..., this.inputchangehexa.bind(this)); this.setcolor(this.color); pickers[topic] = this; } /*************************************************************************/ // function for generating the color-picker /*************************************************************************/ colorpicker.prototype.createpickingarea = function createpickingarea() { var area = document.createelement('div'); var picker = document.createelement('div'); area.classname = 'picking-area'; picker.classname = 'picker'; this.picking_area = area; this.color_picker = picker; setmousetracking(area, this.updatecolor.bind(this)); area.appendchild(picker); this.node.appendchild(area); }; colorpicker.prototype.createhuearea = function createhuearea() { var area = document.createeleme...
...nt('div'); var picker = document.createelement('div'); area.classname = 'hue'; picker.classname ='slider-picker'; this.hue_area = area; this.hue_picker = picker; setmousetracking(area, this.updatehueslider.bind(this)); area.appendchild(picker); this.node.appendchild(area); }; colorpicker.prototype.createalphaarea = function createalphaarea() { var area = document.createelement('div'); var mask = document.createelement('div'); var picker = document.createelement('div'); area.classname = 'alpha'; mask.classname = 'alpha-mask'; picker.classname = 'slider-picker'; this.alpha_area = area; this.alpha_mask = mask; this.alpha_picker = picker; setmousetracking(area, this.updatealphaslider.bind(this)); area.appendchild(mask); mask.appendchild(picker); this...
...And 20 more matches
Block formatting context - Developer guides
Web › Guide › CSS › Block formatting context
it's the region in which the layout of block boxes occurs and in which floats interact with other elements.
... a block formatting context is created by at least one of the following: the root element of the document (<html>).
... floats (elements where float isn't none).
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SVG Presentation Attributes - SVG: Scalable Vector Graphics
Web › SVG › Attribute › Presentation
svg presentation attributes are css properties that can be used as attributes on svg elements.
... value: auto|baseline|before-edge|text-before-edge|middle|central|after-edge|text-after-edge|ideographic|alphabetic|hanging|mathematical|inherit; animatable: yes baseline-shift it allows repositioning of the dominant-baseline relative to the dominant-baseline of the parent text content element.
... value: auto|baseline|super|sub|<percentage>|<length>|inherit; animatable: yes clip deprecated it defines what portion of an element is visible.
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Introduction to XUL - Archive of obsolete content
Archive › Mozilla › XUL › Introduction to XUL
in fact, it is just xml with specific meaning defined for a few element types, and into which html can be scattered.
...the task of writing a xul window description is basically the same as the task of writing an html content description, with these exceptions: the syntax is xml (not that different from html 4), and there are some elements unique to xul.
... these elements are widgets and certain infrastructure associated with the behaviour of the window, explained below.
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splitter - Archive of obsolete content
Archive › Mozilla › XUL › splitter
« xul reference home [ examples | attributes | properties | methods | related ] an element which should appear before or after an element inside a container.
... when the splitter is dragged, the sibling elements of the splitter are resized.
... if a grippy is placed inside the splitter, one sibling element of the splitter is collapsed when the grippy is clicked.
...And 19 more matches
CSS - Archive of obsolete content
Archive › Web › CSS
obsolete css features -moz-bindingthe -moz-binding css property is used by mozilla-based applications to attach an xbl binding to a dom element.-moz-border-bottom-colorsin mozilla applications like firefox, the -moz-border-bottom-colors css property sets a list of colors for the bottom border.-moz-border-left-colorsin mozilla applications like firefox, the -moz-border-left-colors css property sets a list of colors for the left border.-moz-border-right-colorsin mozilla applications like firefox, the -moz-border-right-colors css property sets a list of colors for the right border.-moz-border-top-colorsin mozilla applications like firefox, the -moz-border-top-colors css property sets a list of colors for the top border.-moz-stack-sizing-moz-stack-sizing is an extended css property.
... normally, a <xul:stack> will change its size so that all of its child elements are completely visible.
...om behavior that occurs when a user hits the zoom limit during page manipulation.-ms-content-zoom-limitthe -ms-content-zoom-limit css shorthand property is a microsoft extension that specifies values for the -ms-content-zoom-limit-min and -ms-content-zoom-limit-max properties.-ms-content-zoom-limit-maxthe -ms-content-zoom-limit-max css property is a microsoft extension that specifies the selected elements' maximum zoom factor.-ms-content-zoom-limit-minthe -ms-content-zoom-limit-min css property is a microsoft extension that specifies the minimum zoom factor.-ms-content-zoom-snapthe -ms-content-zoom-snap css shorthand property is a microsoft extension that specifies values for the -ms-content-zoom-snap-type and -ms-content-zoom-snap-points properties.-ms-content-zoom-snap-pointsthe -ms-content-zoo...
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CSS and JavaScript accessibility best practices - Learn web development
Learn › Accessibility › CSS and JavaScript
correct semantics and user expectation it is possible to use css to make any html element look like anything, but this doesn't mean that you should.
... as we frequently mentioned in our html: a good basis for accessibility article, you should use the appropriate semantic element for the job, whenever possible.
...using correct semantics has a lot to do with user expectations — elements look and behave in certain ways, according to their functionality, and these common conventions are expected by users.
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What’s in the head? Metadata in HTML - Learn web development
Learn › HTML › Introduction to HTML › The head metadata in HTML
let's revisit the simple html document we covered in the previous article: <!doctype html> <html> <head> <meta charset="utf-8"> <title>my test page</title> </head> <body> <p>this is my page</p> </body> </html> the html head is the contents of the <head> element — unlike the contents of the <body> element (which are displayed on the page when loaded in a browser), the head's content is not displayed on the page.
...our aim here is not to show you how to use everything that can possibly be put in the head, but rather to teach you how to use the major elements that you'll want to include in the head, and give you some familiarity.
... adding a title we've already seen the <title> element in action — this can be used to add a title to the document.
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Handling common HTML and CSS problems - Learn web development
Learn › Tools and testing › Cross browser testing › HTML and CSS
in the worst cases, javascript is used to generate the entire web page content and style, which makes your pages inaccessible, and less performant (generating dom elements is expensive).
...if you have a widget, make sure it has a distinct class, and then start the selectors that select elements inside the widget with this class, so conflicts are less likely.
...in general, most core html and css functionality (such as basic html elements, css basic colors and text styling) works across most browsers you'll want to support; more problems are uncovered when you start wanting to use newer features such as flexbox, or html5 video/audio, or even more nascent, css grids or -webkit-background-clip: text.
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Displaying Places information using views
Mozilla › Displaying Place information using views
places provides the following built-in views: tree menu toolbar instantiating the three built-in views are simply standard xul elements with a special type attribute whose value is "places".
... every xul document containing a built-in view must import the stylesheet browser/components/places/content/places.css and overlay the file browser/components/places/content/placesoverlay.xul: <?xml-stylesheet href="chrome://browser/content/places/places.css" ?> <?xul-overlay href="chrome://browser/content/places/placesoverlay.xul" ?> it's this stylesheet that binds elements with the special type attribute to one of the views.
...note that in the latter case it is not sufficient to call setattribute on the element; use the element's place property instead.
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How whitespace is handled by HTML, CSS, and in the DOM - Web APIs
Web › API › Document Object Model › Whitespace
in the case of html, whitespace is largely ignored — whitespace in between words is treated as a single character, and whitespace at the start and end of elements and outside elements is ignored.
... </h1> this source code contains a couple of line feeds after the doctype and a bunch of space characters before, after, and inside the <h1> element, but the browser doesn’t seem to care at all and just shows the words "hello world!" as if these characters didn’t exist at all: this is so that whitespace characters don't impact the layout of your page.
... creating space around and inside elements is the job of css.
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Drag Operations - Web APIs
Web › API › HTML Drag and Drop API › Drag operations
for other elements, they must be part of a selection for a default drag to occur.
... in html, apart from the default behavior for images, links, and selections, no other elements are draggable by default.
... to make other html elements draggable, three things must be done: set the draggable="true" on the element that you wish to make draggable.
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WAI-ARIA Roles - Accessibility
Web › Accessibility › ARIA › Roles
for a full list of roles, see using aria: roles, states, and properties aria: alert rolethe alert role can be used to tell the user an element has been dynamically updated.
...if the user is expected to close the alert, then the alertdialog role should be used instead.aria: application rolethe application role indicates to assistive technologies that an element and all of its children should be treated similar to a desktop application, and no traditional html interpretation techniques should be used.
...this usually includes a logo, company name, search icon, photo related to the page, or slogan.aria: button rolethe button role should be used for clickable elements that trigger a response when activated by the user.
...And 19 more matches
:nth-child() - CSS: Cascading Style Sheets
Web › CSS › :nth-child
the :nth-child() css pseudo-class matches elements based on their position in a group of siblings.
... /* selects the second <li> element in a list */ li:nth-child(2) { color: lime; } /* selects every fourth element among any group of siblings */ :nth-child(4n) { color: lime; } syntax the nth-child pseudo-class is specified with a single argument that describes a pattern for matching element indices in a list of siblings.
... element indices are 1-based.
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Linear-gradient Generator - CSS: Cascading Style Sheets
Web › CSS › Tools › Linear-gradient Generator
5%; color: #777; position: relative; float: left; } #output .property { height: 100%; width: 12%; position: absolute; left: 0; } #output .value { width: 88%; position: absolute; white-space: pre; word-wrap: break-word; display: block; right: 0; } javascript content var uicolorpicker = (function uicolorpicker() { 'use strict'; function getelembyid(id) { return document.getelementbyid(id); } var subscribers = []; var pickers = []; /** * rgba color class * * hsv/hsb and hsl (hue, saturation, value / brightness, lightness) * @param hue 0-360 * @param saturation 0-100 * @param value 0-100 * @param lightness 0-100 */ function color(color) { if(color instanceof color === true) { this.copy(color); return; } this.r = 0; this.g = 0; t...
..., this.inputchangehexa.bind(this)); this.setcolor(this.color); pickers[topic] = this; } /*************************************************************************/ // function for generating the color-picker /*************************************************************************/ colorpicker.prototype.createpickingarea = function createpickingarea() { var area = document.createelement('div'); var picker = document.createelement('div'); area.classname = 'picking-area'; picker.classname = 'picker'; this.picking_area = area; this.color_picker = picker; setmousetracking(area, this.updatecolor.bind(this)); area.appendchild(picker); this.node.appendchild(area); }; colorpicker.prototype.createhuearea = function createhuearea() { var area = document.createeleme...
...nt('div'); var picker = document.createelement('div'); area.classname = 'hue'; picker.classname ='slider-picker'; this.hue_area = area; this.hue_picker = picker; setmousetracking(area, this.updatehueslider.bind(this)); area.appendchild(picker); this.node.appendchild(area); }; colorpicker.prototype.createalphaarea = function createalphaarea() { var mask = document.createelement('div'); var picker = document.createelement('div'); mask.classname = 'alpha'; picker.classname = 'slider-picker'; this.alpha_mask = mask; this.alpha_picker = picker; setmousetracking(mask, this.updatealphaslider.bind(this)); mask.appendchild(picker); this.node.appendchild(mask); }; colorpicker.prototype.createpreviewbox = function createpreviewbox(e) { var preview_box = docume...
...And 19 more matches
BigInt64Array - JavaScript
Web › JavaScript › Reference › Global Objects › BigInt64Array
once established, you can reference elements in the array using the object's methods, or by using standard array index syntax (that is, using bracket notation).
... static properties bigint64array.bytes_per_element returns a number value of the element size.
... bigint64array.prototype.length returns the number of elements hold in the bigint64array.
...And 19 more matches
BigUint64Array - JavaScript
Web › JavaScript › Reference › Global Objects › BigUint64Array
once established, you can reference elements in the array using the object's methods, or by using standard array index syntax (that is, using bracket notation).
... static properties biguint64array.bytes_per_element returns a number value of the element size.
... biguint64array.prototype.length returns the number of elements hold in the biguint64array.
...And 19 more matches
Float32Array - JavaScript
Web › JavaScript › Reference › Global Objects › Float32Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... static properties float32array.bytes_per_element returns a number value of the element size.
... float32array.prototype.length returns the number of elements hold in the float32array.
...And 19 more matches
Float64Array - JavaScript
Web › JavaScript › Reference › Global Objects › Float64Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... static properties float64array.bytes_per_element returns a number value of the element size.
... float64array.prototype.length returns the number of elements hold in the float64array.
...And 19 more matches
Int16Array - JavaScript
Web › JavaScript › Reference › Global Objects › Int16Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... static properties int16array.bytes_per_element returns a number value of the element size.
... int16array.prototype.length returns the number of elements hold in the int16array.
...And 19 more matches
Int32Array - JavaScript
Web › JavaScript › Reference › Global Objects › Int32Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... static properties int32array.bytes_per_element returns a number value of the element size.
... int32array.prototype.length returns the number of elements hold in the int32array.
...And 19 more matches
Int8Array - JavaScript
Web › JavaScript › Reference › Global Objects › Int8Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... static properties int8array.bytes_per_element returns a number value of the element size.
... int8array.prototype.length returns the number of elements hold in the int8array.
...And 19 more matches
Uint16Array - JavaScript
Web › JavaScript › Reference › Global Objects › Uint16Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... static properties uint16array.bytes_per_element returns a number value of the element size.
... uint16array.prototype.length returns the number of elements hold in the uint16array.
...And 19 more matches
Uint32Array - JavaScript
Web › JavaScript › Reference › Global Objects › Uint32Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... static properties uint32array.bytes_per_element returns a number value of the element size.
... uint32array.prototype.length returns the number of elements hold in the uint32array.
...And 19 more matches
Uint8Array - JavaScript
Web › JavaScript › Reference › Global Objects › Uint8Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... static properties uint8array.bytes_per_element returns a number value of the element size.
... uint8array.prototype.length returns the number of elements held in the uint8array.
...And 19 more matches
Uint8ClampedArray - JavaScript
Web › JavaScript › Reference › Global Objects › Uint8ClampedArray
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... static properties uint8clampedarray.bytes_per_element returns a number value of the element size.
... uint8clampedarray.prototype.length returns the number of elements hold in the uintclamped8array.
...And 19 more matches
begin - SVG: Scalable Vector Graphics
Web › SVG › Attribute › begin
the begin attribute defines when an animation should begin or when an element should be discarded.
... six elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, <animatetransform>, <discard>, and <set> animate, animatecolor, animatemotion, animatetransform, set for <animate>, <animatecolor>, <animatemotion>, <animatetransform>, and <set>, begin defines when the element should begin, i.e.
...the element's animation start time is defined relative to the begin or active end of another animation.
...And 19 more matches
OpenClose - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › OpenClose
for instance, a menu's popup will open when the menu label is clicked, and a submenu will open when the mouse is hovered over the parent menu element.
...the menu element has an open property which may be set to true to open the menu, or false to close the menu.
...here is a complete example which uses a button to open a menu: <button label="open menu" oncommand="document.getelementbyid('editmenu').open = true;"/> <menu id="editmenu" label="edit"> <menupopup> <menuitem label="cut"/> <menuitem label="copy"/> <menuitem label="paste"/> </menupopup> </menu> this technique may be used for both menupopups that use the menu tag, the button tag and the toolbarbutton tag.
...And 18 more matches
Template Builder Interface - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Template Builder Interface
« previousnext » when inserting an element into a xul document, the element is checked to see if it has a datasources attribute.
... if so, a template builder will be created for the element and attached to the element.
... if the element is a <tree> element and has the flags attribute set to "dont-build-content", a tree builder will be created.
...And 18 more matches
Adding Style Sheets - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Adding Style Sheets
« previousnext » we have hardly modified the look of the elements we have created so far.
... xul uses css (cascading style sheets) to customize elements.
... style sheets a style sheet is a file which contains style information for elements.
...And 18 more matches
Advanced Rules - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Advanced Rules
the conditions element is used to specify the criteria for matching a given resource.
...in the simple rule syntax, the conditions are placed directly on the rule element itself.
...rule conditions when a tree, menu or other element with a datasource generates content, the template builder first finds the resource referred to by the ref attribute.
...And 18 more matches
Box Model Details - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Box Model Details
more layout details the style properties such as min-width and max-height can be applied to any element.
...in addition, the flex attribute can be applied to any element.
... example 1 : source view <hbox flex="1"> <button label="left" style="min-width: 100px;" flex="1"/> <spacer flex="1"/> <button label="right" style="min-width: 100px;" flex="1"/> </hbox> in the example above, all three elements will resize themselves as they are all flexible.
...And 18 more matches
Commands - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Commands
command elements the command element is used to create commands which can be used to carry out operations.
...if you did not use commands, you would need to figure out which field has the focus, then check to ensure that the operation is suitable for that element.
... in addition, the menu commands would need to be enabled and disabled depending on whether the focused element had selected text or not, and for paste operations, whether there is something suitable on the clipboard to paste.
...And 18 more matches
Splitters - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Splitters
splitter element this feature is accomplished using an element called a splitter.
...you can place a splitter anywhere you want and it will allow resizing of the elements that come before it and the elements that come after it in the same box.
...set this to before for the element before the splitter, or after for the element after the splitter.
...And 18 more matches
Styling a Tree - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Styling a Tree
styling the tree you can style the tree border and the column headers in the same way as other elements.
... style added to the tree element will apply to the entire tree.
... adding a style to the treecol element does not cause the style to be applied to the column but only to the header.
...And 18 more matches
Using Spacers - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Using Spacers
« previousnext » in this section, we will find out how to add some spacing in between the elements we have created.
...(java uses layout managers for example.) xul provides the capability for elements to position and resize automatically.
... as we've seen, the find files window has appeared in a size that will fit the elements inside it.
...And 18 more matches
description - Archive of obsolete content
Archive › Mozilla › XUL › description
« xul reference home [ examples | attributes | properties | methods | related ] this element is used to create a block of text.
...</description> this is a long section of text that will not word wrap <description value="this is a long section of text that will not word wrap"> </description> this is a long section of dynamically controlled text that will word wrap <description id="desc" style="width: 300px"></description> document.getelementbyid('desc').textcontent = "this is a long section of dynamic message text that will word wrap"; attributes crop type: one of the values below if the label of the element is too big to fit in its given space, the text will be cropped on the side specified by the crop attribute.
... depending on the platform and theme being used, some elements will have set a maximum width so they will always appear cropped.
...And 18 more matches
Debugging CSS - Learn web development
Learn › CSS › Building blocks › Debugging CSS
perhaps you believe that a certain selector should match an element, but nothing happens, or a box is a different size than you expected.
...for inspecting the properties and values applied to elements on your page, and making changes to them from the editor.
...if you incorrectly closed an element, for instance opening an <h2> but closing with an </h3>, the browser will figure out what you were meaning to do and the html in the dom will correctly close the open <h2> with an </h2>.
...And 18 more matches
Legacy layout methods - Learn web development
Learn › CSS › CSS layout › Legacy Layout Methods
cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p> </div> each one of the columns needs an outer element to contain its content and let us manipulate all of it at once.
...if we want the two <div>s to be floated alongside one another, we need to set their widths to total 100% of the width of their parent element or smaller so they can fit alongside one another.
... in the <style> element, add the following code, which gives the wrapper container a width of 980 pixels, with padding on the right hand side of 20 pixels.
...And 18 more matches
HTML table advanced features and accessibility - Learn web development
Learn › HTML › Tables › Advanced
adding a caption to your table with <caption> you can give your table a caption by putting it inside a <caption> element and nesting that inside the <table> element.
... note: the summary attribute can also be used on the <table> element to provide a description — this is also read out by screenreaders.
... we'd recommend using the <caption> element instead, however, as summary is deprecated by the html5 spec, and can't be read by sighted users (it doesn't appear on the page.) active learning: adding a caption let's try this out, revisiting an example we first met in the previous article.
...And 18 more matches
nsIAccessibleProvider
Mozilla › Tech › XPCOM › Reference › Interface › nsIAccessibleProvider
accessible/public/nsiaccessibleprovider.idlscriptable used to link element and accessible object.
... for that xbl binding, element should implement the interface.
... outerdoc 0x00000001 for elements that spawn a new document.
...And 18 more matches
<input type="datetime-local"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › datetime-local
<input> elements of type datetime-local create input controls that let the user easily enter both a date and a time, including the year, month, and day as well as the time in hours and minutes.
... some browsers may resort to a text-only input element that validates that the results are legitimate date/time values before letting them be delivered to the server, as well, but you shouldn't rely on this behavior since you can't easily predict it.
... you can also get and set the date value in javascript using the htmlinputelement.value property, for example: var datecontrol = document.queryselector('input[type="datetime-local"]'); datecontrol.value = '2017-06-01t08:30'; there are several methods provided by javascript's date that can be used to convert numeric date information into a properly-formatted string, or you can do it manually.
...And 18 more matches
<label> - HTML: Hypertext Markup Language
Web › HTML › Element › label
the html <label> element represents a caption for an item in a user interface.
... associating a <label> with an <input> element offers some major advantages: the label text is not only visually associated with its corresponding text input; it is programmatically associated with it too.
... to associate the <label> with an <input> element, you need to give the <input> an id attribute.
...And 18 more matches
tabs/utils - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › tabs utils
parameters tab : tab a xul tab element to activate.
... gettabbrowser(window) get the tabbrowser element for the given browser window.
... returns array : an array of tab elements.
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Tabboxes - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Tabboxes
it involves five new elements, which are described briefly here and in more detail below.
...you would place the content for a page within this element.
... the tabbox is the outer element.
...And 17 more matches
prefpane - Archive of obsolete content
Archive › Mozilla › XUL › prefpane
the former is specified using a preferences element while the latter may be specified using other xul elements.
... both may be specified directly as children of the prefpane element, or the src attribute may be used to put a pane in a separate file.
... attributes helpuri, image, label, onpaneload, selected, src properties image, label, preferenceelements, preferences, selected, src examples methods preferenceforelement <prefpane id="panegeneral" label="general" src="chrome://path/to/paneoverlay.xul"/> or <prefpane id="panegeneral" label="general" onpaneload="ongeneralpaneload(event);"> <preferences> <preference id="pref_one" name="extensions.myextension.one" type="bool"/> ...
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scale - Archive of obsolete content
Archive › Mozilla › XUL › scale
min, movetoclick, pageincrement, tabindex, value properties disabled, max, min, increment, pageincrement, tabindex, value, methods decrease, decreasepage, increase, increasepage, examples horizontal scale: <scale min="1" max="10"/> vertical scale: <scale min="1" max="10" orient="vertical"/> attributes dir type: one of the values below the direction in which the child elements of the element are placed.
... normal for scales, the scale's values are ordered from left to right (for horizontal scales) or from top to bottom (for vertical scales) for other elements, the elements are placed left to right or top to bottom in the order they appear in the xul code.
...for other elements, they are placed right to left or bottom to top.
...And 17 more matches
Styling web forms - Learn web development
Learn › Forms › Styling web forms
these problems can be divided into three categories: the good some elements can be styled with few if any problems across platforms.
... these include the following elements: <form> <fieldset> and <legend> single-line text <input>s (e.g.
... multi-line <textarea>s buttons (both <input> and <button>s) <label> <output> the bad some elements are more difficult to style, requiring more complex css or some more specific tricks: checkboxes and radio buttons <input type="search"> we describe how to handle these more specific features in the article advanced form styling.
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Starting WebLock
Mozilla › Tech › XPCOM › Guide › Creating components › Starting WebLock
this interface allows you to pass a list of elements between interfaces.
... it has two methods: hasmoreelements() and getnext().
... [scriptable, uuid(d1899240-f9d2-11d2-bdd6-000064657374)] interface nsisimpleenumerator : nsisupports { /** * called to determine whether or not the enumerator has * any elements that can be returned via getnext().
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<menu> - HTML: Hypertext Markup Language
Web › HTML › Element › menu
the html <menu> element represents a group of commands that a user can perform or activate.
...if the element's children include at least one <li> element: palpable content.
... permitted content if the element is in the list menu state: flow content, or alternatively, zero or more occurrences of <li>, <script>, and <template>.
...And 17 more matches
HTML: Hypertext Markup Language
Web › HTML
html markup includes special "elements" such as <head>, <title>, <body>, <header>, <footer>, <article>, <section>, <p>, <div>, <span>, <img>, <aside>, <audio>, <canvas>, <datalist>, <details>, <embed>, <nav>, <output>, <progress>, <video>, <ul>, <ol>, <li> and many others.
... an html element is set off from other text in a document by "tags", which consist of the element name surrounded by "<" and ">".
... the name of an element inside a tag is case insensitive.
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SVG 2 support in Mozilla - SVG: Scalable Vector Graphics
Web › SVG › SVG 2 support in Mozilla
general change notes length attribute and indexed property for list interfaces implementation status unknown <script> element in content model of all elements implementation status unknown initialize(), appenditem(), replaceitem(), and insertitembefore() on list objects making a copy of any list item being inserted that is already in another list implementation status unknown crossorigin attribute for <image> and <script> elements not implemented yet (at least for <image>; bug 1240357) ...
...rendering model change notes svg root and <foreignobject> not overflow:hidden in ua style sheet implementation status unknown allow overflow: auto; to clip and show scroll bars implementation status unknown allow overflow: scroll; to show scroll bars on <svg> elements implementation status unknown basic data types and interfaces change notes dommatrix or dommatrixreadonly instead of svgmatrix implementation status unknown domrect or domrectreadonly instead of svgrect implementation status unknown dompoint or dompointreadonly instead of svgpoint implementation status unknown members of svgstylable and svglangspace available in svgelement implementation status unknown ...
... svggraphicselement instead of svglocatable and svgtransformable implementation status unknown svggeometryelement with svggeometryelement.ispointinfill() and svggeometryelement.ispointinstroke() methods partially implemented (bug 1239100).
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Using shadow DOM - Web Components
Web › Web Components › Using shadow DOM
the shadow dom api is a key part of this, providing a way to attach a hidden separated dom to an element.
... high-level view this article assumes you are already familiar with the concept of the dom (document object model) — a tree-like structure of connected nodes that represents the different elements and strings of text appearing in a markup document (usually an html document in the case of web documents).
...aur.png" alt="a red tyrannosaurus rex: a two legged dinosaur standing upright like a human, with small arms, and a large head with lots of sharp teeth."> <p>here we will add a link to the <a href="https://www.mozilla.org/">mozilla homepage</a></p> </section> </body> </html> this fragment produces the following dom structure: shadow dom allows hidden dom trees to be attached to elements in the regular dom tree — this shadow dom tree starts with a shadow root, underneath which can be attached to any elements you want, in the same way as the normal dom.
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CSS values and units - Learn web development
Learn › CSS › Building blocks › Values and units
you might get confused between css data types and html elements too, as they both use angle brackets, but this is unlikely — they are used in very different contexts.
...percentage values are always relative to another quantity, for example an element's length is relative to its parent element's length.
... relative length units relative length units are relative to something else, perhaps the size of the parent element's font, or the size of the viewport.
...And 16 more matches
Normal Flow - Learn web development
Learn › CSS › CSS layout › Normal Flow
previous overview: css layout next this article explains normal flow, or the way that webpage elements lay themselves out if you have not changed their layout.
... as detailed in the last lesson introducing layout, elements on a webpage lay out in the normal flow, if you have not applied any css to change the way they behave.
... and, as we began to discover, you can change how elements behave either by adjusting their position in that normal flow, or removing them from it altogether.
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CSS property compatibility table for form controls - Learn web development
Learn › Forms › Property compatibility table for form controls
buttons see the button, submit, and reset input types and the <button> element.
... border and background background no no border-radius no no box-shadow no no select boxes (single line) see the <select>, <optgroup> and <option> elements.
... property n t note css box model width partial[1] partial[1] this property is okay on the <select> element, but it cannot be the case on the <option> or <optgroup> elements.
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Video and audio content - Learn web development
Learn › HTML › Multimedia and embedding › Video and audio content
in this article we'll look at doing just that with the <video> and <audio> elements; we'll then finish off by looking at how to add captions/subtitles to your videos.
...fortunately, a few years later the html5 specification had such features added, with the <video> and <audio> elements, and some shiny new javascript apis for controlling them.
... the <video> element the <video> element allows you to embed a video very easily.
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Mozilla’s UAAG evaluation report
Mozilla › Accessibility › UAAG evaluation report
title for *any* element: rendered as tooltip longdesc for img element: in context menu - properties content of object element: ?
... alt for area element: ?
... alt for input element: ?
...And 16 more matches
Signaling and video calling - Web APIs
Web › API › WebRTC API › Signaling and video calling
this requires video elements, and a button to hang up the call: <div class="flexchild" id="camera-container"> <div class="camera-box"> <video id="received_video" autoplay></video> <video id="local_video" autoplay muted></video> <button id="hangup-button" onclick="hangupcall();" disabled> hang up </button> </div> </div> the page structure defined here is using <div> elements, giving us full contro...
...take note of the two <video> elements, one for your self-view, one for the connection, and the <button> element.
... the <video> element with the id "received_video" will present video received from the connected user.
...And 16 more matches
Taking still photos with WebRTC - Web APIs
Web › API › WebRTC API › Taking still photos
the first panel on the left contains two components: a <video> element, which will receive the stream from webrtc, and a <button> the user clicks to capture a video frame.
... next, we have a <canvas> element into which the captured frames are stored, potentially manipulated in some way, and then converted into an output image file.
... we also have an <img> element into which we will draw the image — this is the final display shown to the user.
...And 16 more matches
ARIA annotations - Accessibility
Web › Accessibility › ARIA › Annotations
aria annotations features the aria attributes providing these new abilities are as follows: aria-description="" — provides a detailed description of an html element, as opposed to the brief label provided by aria-label.
... role="insertion" and role="deletion" — semantically denote html elements whose contents represent an insertion to or deletion from the overall document.
... these are semantically equivalent to the html <ins> and <del> elements.
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ARIA: cell role - Accessibility
Web › Accessibility › ARIA › Roles › Cell Role
the cell value of the aria role attribute identifies an element as being a cell in a tabular container that does not contain column or row header information.
... to be supported, the cell must be nested in an element with the role of row.
... <div role="row"> <span role="cell">france</span> <span role="cell">67 million</span> </div> a better, more semantic way of writing the cells above would be to use the semantic <td> element.
...And 16 more matches
Specificity - CSS: Cascading Style Sheets
Web › CSS › Specificity
specificity is the means by which browsers decide which css property values are the most relevant to an element and, therefore, will be applied.
...when multiple declarations have equal specificity, the last declaration found in the css is applied to the element.
... specificity only applies when the same element is targeted by multiple declarations.
...And 16 more matches
util/array - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › util array
globals functions has(array, element) returns true if the given array contains the element or false otherwise.
... a simplified version of array.indexof(element) >= 0.
... element : * the element to search for in the array.
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Inner-browsing extending the browser navigation paradigm - Archive of obsolete content
Archive › Inner-browsing extending the browser navigation paradigm
some examples: web page with ticker it is common to see web pages with a ticker element, often used to rotate news or stock quotes updates.
... a simple ticker element implemented in dhtml statically includes the data in the page.
... of course, specific implementations may have different requirements, like the use of multiple iframe elements to make multiple requests retrieving different contents at the same time.
...And 15 more matches
Tooltips - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › Tooltips
for this, the tooltiptext attribute may be used, which is valid for all xul elements.
... if an element does not have a tooltiptext attribute, yet a parent element does, the parent tooltip will apply.
... the tooltip element tooltips are displayed using a tooltip element, which is a type of popup, but is styled to look different.
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List Controls - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › List Controls
« previousnext » xul has a number of types of elements for creating list boxes.
...xul provides two types of elements to create lists, a listbox element to create multi-row list boxes, and a menulist element to create drop-down list boxes.
... they work similar to the html select element, which performs both functions, but the xul elements have additional features.
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tooltip - Archive of obsolete content
Archive › Mozilla › XUL › tooltip
« xul reference home [ examples | attributes | properties | methods | related ] this element is used for the tooltip popups.
... for text-only tooltips, this element doesn't need to be used; instead you may just add a tooltiptext attribute to an element.
...es <tooltip id="moretip" orient="vertical" style="background-color: #33dd00;"> <label value="click here to see more information"/> <label value="really!" style="color: red;"/> </tooltip> <vbox> <button label="simple" tooltiptext="a simple popup"/> <button label="more" tooltip="moretip"/> </vbox> attributes crop type: one of the values below if the label of the element is too big to fit in its given space, the text will be cropped on the side specified by the crop attribute.
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Type, class, and ID selectors - Learn web development
Learn › CSS › Building blocks › Selectors › Type Class and ID Selectors
type selectors a type selector is sometimes referred to as a tag name selector or element selector, because it selects an html tag/element in your document.
...all instances of <span>, <em> and <strong> elements are therefore styled accordingly.
... try adding a css rule to select the <h1> element and change its color to blue.
...And 15 more matches
Advanced Svelte: Reactivity, lifecycle, accessibility - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Svelte reactivity lifecycle accessibility
we will also see how to declare and clean-up event listeners on dom elements.
...we will also learn about the action directive, which will allow us to extend the functionality of html elements in a reusable and declarative way.
...this outline is your visual indicator that the browser is currently focused on this element.
...And 15 more matches
Implementing feature detection - Learn web development
Learn › Tools and testing › Cross browser testing › Feature detection
css you can write tests for css features by testing for the existence of element.style.property (e.g.
... we will add the html5 shiv to our example too so that the html5 semantic elements will style properly in older versions of ie.
... download the latest version (see manual installation), unzip the zip file, copy the html5shiv-printshiv.min.js and html5shiv.min.js files into your example directory, and link to one of the files by putting the following under your <title> element: <script src="html5shiv.min.js"></script> have a look at your example css files — you'll see that basic-styling.css handles all the styling that we want to give to every browser, whereas the other two css files contain the css we want to selectively apply to browser depending on their support levels.
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Node - Web APIs
Web › API › Node
most notable are document, element, and documentfragment.
... node.baseuriobject read only (not available to web content.) the nsiuri object representing the base uri for the element.
...an htmlelement will contain the name of the corresponding tag, like 'audio' for an htmlaudioelement, a text node will have the '#text' string, or a document node will have the '#document' string.
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ValidityState - Web APIs
Web › API › ValidityState
the validitystate interface represents the validity states that an element can be in, with respect to constraint validation.
... together, they help explain why an element's value fails to validate, if it's not valid.
... properties for each of these boolean properties, a value of true indicates that the specified reason validation may have failed is true, with the exception of the valid property, which is true if the element's value obeys all constraints.
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Introduction to formatting contexts - CSS: Cascading Style Sheets
Web › CSS › CSS Flow Layout › Intro to formatting contexts
a block formatting context (bfc) will lay child elements out according to block layout rules, a flex formatting context will lay its children out as flex items, etc.
... block formatting contexts the outermost element in a document that uses block layout rules establishes the first, or initial block formatting context.
... this means that every element inside the <html> element's block is laid out according to normal flow following the rules for block and inline layout.
...And 15 more matches
Adding captions and subtitles to HTML5 video - Developer guides
Web › Guide › Audio and video delivery › Adding captions and subtitles to HTML5 video
in other articles we looked at how to build a cross browser video player using the htmlmediaelement and window.fullscreen apis, and also at how to style the player.
... this article will take the same player and show how to add captions and subtitles to it, using the webvtt format and the <track> element.
... the <track> element html5 allows us to specify subtitles for a video using the <track> element.
...And 15 more matches
Video player styling basics - Developer guides
Web › Guide › Audio and video delivery › Video player styling basics
the custom video controls and <progress> element are now contained within <div> elements, rather than residing inside unordered list items.
... basic styling the html video and its controls are all contained within a <figure> element, which is given a maximum width and height (based on the dimensions of the video used) and centered within the page: figure { max-width:64rem; width:100%; max-height:30.875rem; height:100%; margin:1.25rem auto; padding:1.051%; background-color:#666; } the video controls container itself also needs some styling so that it is set up the correct way: .controls { width:100%...
...; height:8.0971659919028340080971659919028%; /* of figure's height */ position:relative; } the height of the .controls class is set to be (a very precise!) percentage of the enclosing <figure> element (this was worked out with experimentation based on the required button height).
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<input type="text"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › text
<input> elements of type text create basic single-line text fields.
... additional attributes in addition to the attributes that operate on all <input> elements regardless of their type, text inputs support the following attributes: attribute description list the id of the <datalist> element that contains the optional pre-defined autocomplete options maxlength the maximum number of characters the input should accept minlength the minimum number of characters long the input can be and still be consider...
...an attribute indicating whether or not the contents of the input should be read-only size a number indicating how many characters wide the input field should be spellcheck controls whether or not to enable spell checking for the input field, or if the default spell checking configuration should be used list the values of the list attribute is the id of a <datalist> element located in the same document.
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<input type="time"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › time
<input> elements of type time create input fields designed to let the user easily enter a time (hours and minutes, and optionally seconds).
...the new element is functionally identical to the old one, but has a similar ui to edge.
...you can set a default value for the input by including a valid time in the value attribute when creating the <input> element, like so: <label for="appt-time">choose an appointment time: </label> <input id="appt-time" type="time" name="appt-time" value="13:30"> you can also get and set the date value in javascript using the htmlinputelement.value property, for example: var timecontrol = document.queryselector('input[type="time"]'); timecontrol.value = '15:30'; time value format the value of the time input is alw...
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<input type="url"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › url
<input> elements of type url are used to let the user enter and edit a url.
... value the <input> element's value attribute contains a domstring which is automatically validated as conforming to url syntax.
... additional attributes in addition to the attributes that operate on all <input> elements regardless of their type, url inputs support the following attributes: attribute description list the id of the <datalist> element that contains the optional pre-defined autocomplete options maxlength the maximum number of characters the input should accept minlength the minimum number of characters long the input can be and still be considere...
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<use> - SVG: Scalable Vector Graphics
Web › SVG › Element › use
the <use> element takes nodes from within the svg document, and duplicates them somewhere else.
... --> </svg> the effect is the same as if the nodes were deeply cloned into a non-exposed dom, then pasted where the use element is, much like cloned template elements in html5.
... most attributes on use do not override those already on the element referenced by use.
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Introduction to using XPath in JavaScript - XPath
Web › XPath › Introduction to using XPath in JavaScript
contextnode.documentelement : contextnode.ownerdocument.documentelement ); or alternatively by using the <code>creatensresolver</code> method of a <code>xpathevaluator</code> object.
...contextnode.documentelement : contextnode.ownerdocument.documentelement ); </pre> and then pass document.evaluate, the nsresolver variable as the namespaceresolver parameter.
... note: xpath defines qnames without a prefix to match only elements in the null namespace.
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Panels - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › Panels
the panel element the panel element is used to create panels.
... the panel will display whatever elements are placed as children of the panel element.
...when you want to associate a panel with a button, place the <panel> element directly inside the button element.
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Introduction to XBL - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Introduction to XBL
you can customize the look of elements by applying styles to them.
...the basic appearance of all elements, such as scroll bars and check boxes may be modified by adjusting the style or by setting attributes on the element.
... however, xul provides no means in which you can change how an element works (or add a new element which can be reused).
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Keyboard Shortcuts - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Keyboard Shortcuts
however, it would be tedious to do that for every button and menu item (though it could be necessary when one's key commands are only triggered when the user is focused on a particular element).
... key element xul provides an element, key, which lets you define a keyboard shortcut for a window.
...the key attribute (note that it has the same name as the element itself) can be used to indicate which key should be pressed, in this case r.
...And 14 more matches
Simple Menu Bars - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Simple Menu Bars
the menu features of xul consist of a number of different elements which allow you to create menu bars or popup menus.
...xul does have some special elements which provide special functionality typical of menus.
... there are five elements associated with creating a menu bar and its menus, which are explained briefly here and in detail afterwards: menubar the container for the row of menus.
...And 14 more matches
Trees and Templates - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Trees and Templates
using a template with a tree uses very much the same syntax as with other elements.
... you need to add a datasources and a ref attribute to the tree element, which specify the datasource and root node to display.
...this means that elements will not be created for every row in the tree, making it more efficient.
...And 14 more matches
menupopup - Archive of obsolete content
Archive › Mozilla › XUL › menupopup
it may be attached to any element using the popup attribute.
... when the element is clicked with the left mouse button, the menupopup will be displayed.
... it may be attached to any element using the context attribute.
...And 14 more matches
Windows Media in Netscape - Archive of obsolete content
Archive › Windows Media in Netscape
for example, a possible regular expression to detect if geckoactivexobject is supported could be: /gecko\/[^)].*\(ax/ embedding the control in web pages: use of the object element netscape 7.1 allows the use of the object element of html to be used to instantiate the windows media player control in the same way it is used in ie.
...example 2: use of object element to create control if you are running netscape 7.1 and later or ie, and have installed windows media player 7 or above, the snippet of code below should produce a windows media control and play a song.
...the various param elements that can be used and the functionalities behind them is best described by the windows media 9 series sdk.
...And 14 more matches
Document and website structure - Learn web development
Learn › HTML › Introduction to HTML › Document and website structure
previous overview: introduction to html next in addition to defining individual parts of your page (such as "a paragraph" or "an image"), html also boasts a number of block level elements used to define areas of your website (such as "the header", "the navigation menu", "the main content column").
...usually, this is contextual to what is contained in the main content (for example on a news article page, the sidebar might contain the author's bio, or links to related articles) but there are also cases where you'll find some recurring elements like a secondary navigation system.
...with the right css, you could use pretty much any elements to wrap around the different sections and get it looking how you wanted, but as discussed before, we need to respect semantics and use the right element for the right job.
...And 14 more matches
Index
Mozilla › Projects › SpiderMonkey › Index
188 js_aliaselement jsapi reference, obsolete, spidermonkey js_aliaselement assigns an alternate index number for an element or numeric property associated with a native object.
... obj is the object to which the element belongs.
... name is the element's current index in the object, and alias is the alternate index to assign to the element.
...And 14 more matches
nsIXULTemplateBuilder
Mozilla › Tech › XPCOM › Reference › Interface › nsIXULTemplateBuilder
the nsitemplatebuilder interface controls the display of elements using a xul template element and is automatically attached to an element containing a datasources attribute.
...a template builder is attached to a single dom node; this node is called the root node and is expected to contain a xul template element as a direct child.
...the <queryset> element contains a single query and one or more <rule> elements.
...And 14 more matches
Using dynamic styling information - Web APIs
Web › API › CSS Object Model › Using dynamic styling information
however, there are cases where actually obtaining or manipulating the rules can be useful (whether for whole stylesheets or individual elements), and that is described in further detail below.
... note also that, as with individual element's dom styles, when speaking of manipulating the stylesheets, this is not actually manipulating the physical document(s), but merely the internal representation of the document.
... modify an element's style the element style property (see also the section "dom style object" below) can also be used to get and set the styles on an element.
...And 14 more matches
EffectTiming.fill - Web APIs
Web › API › EffectTiming › fill
the web animations api's effecttiming dictionary's fill property specifies a fill mode, which defines how the element to which the animation is applied should look when the animation sequence is not actively running, such as before the time specified by iterationstart or after animation's end time.
... for example, setting fill to "none" means the animation's effects are not applied to the element if the current time is outside the range of times during which the animation is running, while "forwards" ensures that once the animation's end time has been passed, the element will continue to be drawn in the state it was in at its last rendered frame.
... element.animate(), and keyframeeffect() accept an object of timing properties including fill.
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Guide to the Fullscreen API - Web APIs
Web › API › Fullscreen API › Guide
this article demonstrates how to use the fullscreen api to place a given element into full-screen mode, as well as how to detect when the browser enters or exits full-screen mode.
... activating full-screen mode given an element that you'd like to present in full-screen mode (such as a <video>, for example), you can present it in full-screen mode by simply calling its requestfullscreen() method.
... let's consider this <video> element: <video controls id="myvideo"> <source src="somevideo.webm"></source> <source src="somevideo.mp4"></source> </video> we can put that video into full-screen mode as follows: var elem = document.getelementbyid("myvideo"); if (elem.requestfullscreen) { elem.requestfullscreen(); } this code checks for the existence of the requestfullscreen() method before calling it.
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Capabilities, constraints, and settings - Web APIs
Web › API › Media Streams API › Constraints
determining if a constraint is supported if you need to know whether or not a given constriant is supported by the user agent, you can find out by calling navigator.mediadevices.getsupportedconstraints() to get a list of the constrainable properties which the browser knows, like this: let supported = navigator.mediadevices.getsupportedconstraints(); document.getelementbyid("framerateslider").disabled = !supported["framerate"]; in this example, the supported constraints are fetched, and a control that lets the user configure the frame rate is disabled if the framerate constraint isn't supported.
... applying constraints the first and most common way to use constraints is to specify them when you call getusermedia(): navigator.mediadevices.getusermedia({ video: { width: { min: 640, ideal: 1920 }, height: { min: 400, ideal: 1080 }, aspectratio: { ideal: 1.7777777778 } }, audio: { samplesize: 16, channelcount: 2 } }).then(stream => { videoelement.srcobject = stream; }).catch(handleerror); in this example, constraints are applied at getusermedia() time, asking for an ideal set of options with fallbacks for the video.
... let videoconstraints = null; let audioconstraints = null; let audiotrack = null; let videotrack = null; and we get references to all of the elements we'll need to access.
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WebGL constants - Web APIs
Web › API › WebGL API › Constants
standard webgl constants are installed on the webglrenderingcontext and webgl2renderingcontext objects, so that you use them as gl.constant_name: var canvas = document.getelementbyid('mycanvas'); var gl = canvas.getcontext('webgl'); gl.getparameter(gl.line_width); some constants are also provided by webgl extensions.
... rendering primitives constants passed to webglrenderingcontext.drawelements() or webglrenderingcontext.drawarrays() to specify what kind of primitive to render.
... constant name value description points 0x0000 passed to drawelements or drawarrays to draw single points.
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Example and tutorial: Simple synth keyboard - Web APIs
Web › API › Web Audio API › Simple synth
we draw this in a pair of nested <div> elements so that we can make the keyboard horizontally scrollable if all the keys don't fit on the screen, without having them wrap around.
...then we establish a box that will be presented on the left side of the bar and place a label and an <input> element of type "range".
... the range element will typically be presented as a slider control; we configure it to allow any value between 0.0 and 1.0, stepping by 0.01 each position.
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An overview of accessible web applications and widgets - Accessibility
Web › Accessibility › An overview of accessible web applications and widgets
since the html4 specification doesn't provide built-in tags that semantically describe these kinds of widgets, developers typically resort to using generic elements such as <div> and <span>.
... many of these were later added in html5, and developers should always prefer using the correct semantic html element over using aria.
...properties describe characteristics of these widgets, such as if they are draggable, have a required element, or have a popup associated with them.
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:nth-last-child() - CSS: Cascading Style Sheets
Web › CSS › :nth-last-child
the :nth-last-child() css pseudo-class matches elements based on their position among a group of siblings, counting from the end.
... /* selects every fourth element among any group of siblings, counting backwards from the last one */ :nth-last-child(4n) { color: lime; } note: this pseudo-class is essentially the same as :nth-child, except it counts items backwards from the end, not forwards from the beginning.
... syntax the nth-last-child pseudo-class is specified with a single argument, which represents the pattern for matching elements, counting from the end.
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content - CSS: Cascading Style Sheets
Web › CSS › content
the content css property replaces an element with a generated value.
... objects inserted using the content property are anonymous replaced elements.
...ue */ content: attr(value string); /* language- and position-dependent keywords */ content: open-quote; content: close-quote; content: no-open-quote; content: no-close-quote; /* except for normal and none, several values can be used simultaneously */ content: open-quote chapter_counter; /* global values */ content: inherit; content: initial; content: unset; syntax values none the pseudo-element is not generated.
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vertical-align - CSS: Cascading Style Sheets
Web › CSS › vertical-align
the vertical-align property can be used in two contexts: to vertically align an inline element's box inside its containing line box.
...ething even more bizarre and inexplicable.</p> <p>there is another theory which states that this has already happened.</p> </td> </tr> </table> table { margin-left: auto; margin-right: auto; width: 80%; } table, th, td { border: 1px solid black; } td { padding: 0.5em; font-family: monospace; } note that vertical-align only applies to inline, inline-block and table-cell elements: you can't use it to vertically align block-level elements.
... values for inline elements parent-relative values these values vertically align the element relative to its parent element: baseline aligns the baseline of the element with the baseline of its parent.
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HTML5 - Developer guides
Web › Guide › HTML › HTML5
it is a new version of the language html, with new elements, attributes, and behaviors, and a larger set of technologies that allows the building of more diverse and powerful web sites and applications.
... semantics sections and outlines in html5 a look at the new outlining and sectioning elements in html5: <section>, <article>, <nav>, <header>, <footer> and <aside>.
... using html5 audio and video the <audio> and <video> elements embed and allow the manipulation of new multimedia content.
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HTTP Index - HTTP
Web › HTTP › Index
19 cross-origin resource policy (corp) http, reference, security cross-origin resource policy is an opt-in mechanism that allows web applications to protect against certain cross-origin requests, such as those issued by the browser when resources are embedded using elements such as <script> and <img>.
... 77 csp: base-uri csp, directive, document directive, http, security the http content-security-policy base-uri directive restricts the urls which can be used in a document's <base> element.
...if this directive is absent, the user agent will use the value in the <base> element.
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Array.prototype.splice() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › splice
the splice() method changes the contents of an array by removing or replacing existing elements and/or adding new elements in place.
...in this case, no element will be deleted but the method will behave as an adding function, adding as many element as item[n*] provided.
... if negative, it will begin that many elements from the end of the array.
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requiredFeatures - SVG: Scalable Vector Graphics
Web › SVG › Attribute › requiredFeatures
it determines whether or not all of the named features are supported by the browser; if all of them are supported, the attribute evaluates to true end the element is rendered; otherwise, the attribute evaluates to false and the current element and its children are skipped and thus will not be rendered.
... requiredfeatures is often used in conjunction with the <switch> element.
... if requiredfeatures is used in other situations, it represents a simple switch on the given element whether to render the element or not.
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Tabbed browser - Archive of obsolete content
Archive › Add-ons › Tabbed browser
within the firefox browser are tabs and inside each tab is a browser, both in the common sense of a web page browser and the xul sense of a browser element.
... furthermore another meaning of 'browser' in this document and in some firefox source is "the tabbrowser element" in a firefox xul window.
... getting access to the browser from main window code running in firefox's global chromewindow, common for extensions that overlay into browser.xul, can access the tabbrowser element using the global variable gbrowser.
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Creating a Microsummary - Archive of obsolete content
Archive › Mozilla › Creating a microsummary
web pages can reference generators via <link rel="microsummary"> elements in their <head> elements.
...then just link to the microsummaries from within the pages themselves using a <link rel="microsummary"> element, f.e.: <head> <link rel="microsummary" href="index.php?view=microsummary"> </head> when firefox encounters a <link rel="microsummary"> element, it loads the url in the href attribute.
... beginnings generators are expressed as xml documents whose root element is the <generator> element in the http://www.mozilla.org/microsummaries/0.1 namespace.
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Drag and Drop JavaScript Wrapper - Archive of obsolete content
Archive › Mozilla › Drag and drop › Drag and Drop JavaScript Wrapper
ondragover(event, flavor, session) this function should be defined when you want something to happen when an element is dragged over.
...you should define this function for elements that allow dragged data to be dropped on them.
... for an observer that is observing an element that can start a drag, you should define at least the ondragstart function.
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Manipulating Lists - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Manipulating Lists
list manipulation the listbox element provides numerous methods to retrieve and manipulate its items.
...here is an example: example 1 : source view <script> function additem(){ document.getelementbyid('thelist').appenditem("thursday", "thu"); } </script> <listbox id="thelist"/> <button label="add" oncommand="additem();"/> the appenditem() takes two arguments, the label, in this case 'thursday', and a value 'thu'.
... the two arguments correspond to the label attribute and the value attribute on the listitem element.
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Stack Positioning - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Stack Positioning
placement of stack children normally, the child elements of a stack stretch to fit the size of the stack.
... the position of a child element may be specified by placing two attributes on the element.
... example 1 : source view <stack> <button label="goblins" left="5" top="5"/> <button label="trolls" left="60" top="20"/> <button label="vampires" left="10" top="60"/> </stack> the stack here contains three elements, each positioned at the coordinates given by the left and top attributes.
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arrowscrollbox - Archive of obsolete content
Archive › Mozilla › XUL › arrowscrollbox
this element is typically used for large popup menus.
... attributes clicktoscroll, disabled, smoothscroll, tabindex properties disabled, scrollboxobject, scrollincrement, smoothscroll, tabindex methods ensureelementisvisible, scrollbyindex, scrollbypixels examples <arrowscrollbox orient="vertical" flex="1"> <button label="red"/> <button label="blue"/> <button label="green"/> <button label="yellow"/> <button label="orange"/> <button label="silver"/> <button label="lavender"/> <button label="gold"/> <button label="turquoise"/> <button label="peach"/> <button label="maroon"/> <button label="black"/> </arrowscrollbox> attributes inherited from xul element align, allowevents, allo...
...wnegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width clicktoscroll type: boolean clicktoscroll, if true, the arrows must be clicked to scroll the scrollbox content.
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Processing XML with E4X - Archive of obsolete content
Archive › Web › E4X › Processing XML with E4X
compatibility issues prior to widespread browser support for the <script> element, it was common for javascript embedded in a page to be surrounded by html comment tags to prevent <script> unaware browsers from displaying javascript code to the user.
... it is possible to interpolate variables into an xml literal to create an element name (or to create content).
...one must instead either calculate the variable with a javascript expression (e.g., bar={'a'+var1+var2}), define a new variable before the element literal which includes the full interpolation and then include that variable or retrieve the attribute after the literal to alter it (see below).
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XForms Switch Module - Archive of obsolete content
Archive › Web › XForms › User Interface Elements › Switch
the module defines for this switch, case and toggle elements.
... switch element the element (see the spec) is used in conjunction with case and toggle elements.
... the switch element contains case elements which in turn contain markup.
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Practical positioning examples - Learn web development
Learn › CSS › CSS layout › Practical positioning examples
and now an ordered list: how exciting!</p> <ol> <li>dui neque eleifend lorem, a auctor libero turpis at sem.</li> <li>aliquam ut porttitor urna.</li> <li>nulla facilisi</li> </ol> </article> </div> </section> so here we've got a <section> element with a class of info-box, which contains a <ul> and a <div>.
...the div contains three <article> elements, which will make up the content panels that correspond to each tab.
...the <a> elements are set to display inline-block so they will sit in a line but still be stylable, and they are styled appropriately for tab buttons, using a variety of other properties.
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How CSS is structured - Learn web development
Learn › CSS › First steps › How CSS is structured
you reference an external css stylesheet from an html <link> element: <!doctype html> <html> <head> <meta charset="utf-8"> <title>my css experiment</title> <link rel="stylesheet" href="styles.css"> </head> <body> <h1>hello world!</h1> <p>this is my first css example</p> </body> </html> the css stylesheet file might look like this: h1 { color: blue; background-color: yellow; border: 1px solid black; } p { color: red; } the h...
...ref attribute of the <link> element needs to reference a file on your file system.
...to create an internal stylesheet, you place css inside a <style> element contained inside the html <head>.
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What are browser developer tools? - Learn web development
Learn › Common questions › What are browser developer tools
opera: developer ➤ developer tools context menu: press-and-hold/right-click an item on a webpage (ctrl-click on the mac), and choose inspect element from the context menu that appears.
... (an added bonus: this method straight-away highlights the code of the element you right-clicked.) the inspector: dom explorer and css editor the developer tools usually open by default to the inspector, which looks something like the following screenshot.
... this tool shows what the html on your page looks like at runtime, as well as what css is applied to each element on the page.
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Build your own function - Learn web development
Learn › JavaScript › Building blocks › Build your own function
we've also provided some basic css to style the custom message box, and an empty <script> element to put our javascript in.
... next, add the following inside the <script> element: function displaymessage() { } we start off with the keyword function, which means we are defining a function.
... finally, add the following code inside the curly braces: const html = document.queryselector('html'); const panel = document.createelement('div'); panel.setattribute('class', 'msgbox'); html.appendchild(panel); const msg = document.createelement('p'); msg.textcontent = 'this is a message box'; panel.appendchild(msg); const closebtn = document.createelement('button'); closebtn.textcontent = 'x'; panel.appendchild(closebtn); closebtn.onclick = function() { panel.parentnode.removechild(panel); } this is quite a lot of code to ...
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A first splash into JavaScript - Learn web development
Learn › JavaScript › First steps › A first splash
= 'last guess was too low!' ; } else if(userguess > randomnumber) { loworhi.textcontent = 'last guess was too high!'; } } guesscount++; guessfield.value = ''; } guesssubmit.addeventlistener('click', checkguess); function setgameover() { guessfield.disabled = true; guesssubmit.disabled = true; resetbutton = document.createelement('button'); resetbutton.textcontent = 'start new game'; document.body.append(resetbutton); resetbutton.addeventlistener('click', resetgame); } function resetgame() { guesscount = 1; const resetparas = document.queryselectorall('.resultparas p'); for(let i = 0 ; i < resetparas.length ; i++) { resetparas[i].textcontent = ''; } resetbu...
... the place where we'll be adding all our code is inside the <script> element at the bottom of the html: <script> // your javascript goes here </script> adding variables to store our data let's get started.
... first of all, add the following lines inside your <script> element: let randomnumber = math.floor(math.random() * 100) + 1; const guesses = document.queryselector('.guesses'); const lastresult = document.queryselector('.lastresult'); const loworhi = document.queryselector('.loworhi'); const guesssubmit = document.queryselector('.guesssubmit'); const guessfield = document.queryselector('.guessfield'); let guesscount = 1; let resetbutton; this section of the code sets up the variables and constants we need to store the data our program will use.
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JavaScript-DOM Prototypes in Mozilla
Mozilla › JavaScript-DOM Prototypes in Mozilla
as an example of this let's look at an html image element in a document.
...here are a few of the properties of obj's prototype: obj.__proto__ parentnode (getter function) src (getter and setter functions) getelementsbytagname (function) text_node (number property, constant) ...
... all those properties come from the interfaces that the c++ image object (nshtmlimageelement) implements and chooses to expose to xpconnect through the object's class info.
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Mozilla Web Developer FAQ
Mozilla › Mozilla Web Developer FAQ
these aspects of the layout can be changed by explicitly setting the display css property of the images (and possible surrounding <a> elements) to block.
... in the standards mode and in the almost standards mode mozilla does not suppress the default margins of the first and last child element in table cells.
... the <link> and <style> elements should be inside the <head> element.
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Using the CSS Painting API - Web APIs
Web › API › CSS Painting API › Guide
the first is the name we give the worklet — this is the name we will use in our css as the parameter of the paint() function when we want to apply this styling to an element.
... .fancy { background-image: paint(headerhighlight); } putting it together we can then add the fancy class to any element on the page to add a yellow box as a background: <h1 class="fancy">my cool header</h1> the following example will look like the image above in browsers supporting the css painting api.
... paintsize in the example above, we created a 20x200 unit box, painted 15 units from the top of the element it is the same regardless of the size of the element.
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Applying styles and colors - Web APIs
Web › API › Canvas API › Tutorial › Applying styles and colors
function draw() { var ctx = document.getelementbyid('canvas').getcontext('2d'); for (var i = 0; i < 6; i++) { for (var j = 0; j < 6; j++) { ctx.fillstyle = 'rgb(' + math.floor(255 - 42.5 * i) + ', ' + math.floor(255 - 42.5 * j) + ', 0)'; ctx.fillrect(j * 25, i * 25, 25, 25); } } } <canvas id="canvas" width="150" height="150"></canvas> draw(); the result looks like this: screenshotlive sample...
... function draw() { var ctx = document.getelementbyid('canvas').getcontext('2d'); for (var i = 0; i < 6; i++) { for (var j = 0; j < 6; j++) { ctx.strokestyle = 'rgb(0, ' + math.floor(255 - 42.5 * i) + ', ' + math.floor(255 - 42.5 * j) + ')'; ctx.beginpath(); ctx.arc(12.5 + j * 25, 12.5 + i * 25, 10, 0, math.pi * 2, true); ctx.stroke(); } } } <canvas id="canvas" width="150" height="150"></canvas> draw(); the result looks like this: screenshotlive sample transparency in addition to drawing opaque shapes ...
... function draw() { var ctx = document.getelementbyid('canvas').getcontext('2d'); // draw background ctx.fillstyle = '#fd0'; ctx.fillrect(0, 0, 75, 75); ctx.fillstyle = '#6c0'; ctx.fillrect(75, 0, 75, 75); ctx.fillstyle = '#09f'; ctx.fillrect(0, 75, 75, 75); ctx.fillstyle = '#f30'; ctx.fillrect(75, 75, 75, 75); ctx.fillstyle = '#fff'; // set transparency value ctx.globalalpha = 0.2; // draw semi transparent circles ...
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Basic usage of canvas - Web APIs
Web › API › Canvas API › Tutorial › Basic usage
« previousnext » let's start this tutorial by looking at the <canvas> html element itself.
... the <canvas> element <canvas id="tutorial" width="150" height="150"></canvas> at first sight a <canvas> looks like the <img> element, with the only clear difference being that it doesn't have the src and alt attributes.
... indeed, the <canvas> element has only two attributes, width and height.
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Window.getComputedStyle() - Web APIs
Web › API › Window › getComputedStyle
the window.getcomputedstyle() method returns an object containing the values of all css properties of an element, after applying active stylesheets and resolving any basic computation those values may contain.
... syntax var style = window.getcomputedstyle(element [, pseudoelt]); element the element for which to get the computed style.
... pseudoeltoptional a string specifying the pseudo-element to match.
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ARIA: gridcell role - Accessibility
Web › Accessibility › ARIA › Roles › Gridcell role
it is intended to mimic the functionality of the html td element for table-style grouping of information.
... <div role="gridcell">potato</div> <div role="gridcell">cabbage</div> <div role="gridcell">onion</div> elements that have role="gridcell" applied to them must be the child of an element with a role of row.
... <div role="row"> <div role="gridcell">jane</div> <div role="gridcell">smith</div> <div role="gridcell">496-619-5098</div> … </div> the first rule of aria is if a native html element or attribute has the semantics and behavior you require, use it instead of re-purposing an element and adding aria.
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ARIA: row role - Accessibility
Web › Accessibility › ARIA › Roles › Row Role
an element with role="row" is a row of cells within a tabular structure.
...span> <span role="columnheader"aria-sort="none">population</span> </div> </div> <div role="rowgroup"> <div role="row"> <span role="cell">finland</span> <span role="cell">5.5 million</span> </div> <div role="row"> <span role="cell">france</span> <span role="cell">67 million</span> </div> </div> </div> description the element role="row" is a row within a grid, table or treegrid, and optionally within a rowgroup, that is a container for one or more cells, gridcells, columnheaders, or rowheaders within a static tabular structure.
... using native html <tr> elements, whenever possible, is strongly encouraged.
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Consistent list indentation - CSS: Cascading Style Sheets
Web › CSS › CSS Lists and Counters › Consistent list indentation
now we wrap these in a parent element; in this case, we'll wrap them in an unordered list (i.e., <ul>).
... according to the css box model, the list items' boxes must be displayed within the parent element's content area.
... here, the dotted blue border shows us the edges of the <ul> element's content area.
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Cross-browser audio basics - Developer guides
Web › Guide › Audio and video delivery › Cross-browser audio basics
here we define an <audio> element with multiple sources — we do this as not all browsers support the same audio formats.
... we do this using the <source> element, which takes the attributes src and type.
... if the <audio> element is not supported then <audio> and <source> will be ignored.
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<input type="number"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › number
<input> elements of type number are used to let the user enter a number.
...you can set a default value for the input by including a number inside the value attribute, like so: <input id="number" type="number" value="42"> additional attributes in addition to the attributes commonly supported by all <input> types, inputs of type number support these attributes: attribute description list the id of the <datalist> element that contains the optional pre-defined autocomplete options max the maximum value to accept for this input min the minimum value to accept for this input placeholder an example value to display inside the field when it's empty readonly a boolean attribute indicating whether the value is read-only step a stepping interval to use when usin...
...g up and down arrows to adjust the value, as well as for validation list the values of the list attribute is the id of a <datalist> element located in the same document.
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Array.prototype.forEach() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › forEach
the foreach() method executes a provided function once for each array element.
... syntax arr.foreach(callback(currentvalue [, index [, array]])[, thisarg]) parameters callback function to execute on each element.
... it accepts between one and three arguments: currentvalue the current element being processed in the array.
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Array.prototype.map() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › map
the map() method creates a new array populated with the results of calling a provided function on every element in the calling array.
... syntax let new_array = arr.map(function callback( currentvalue[, index[, array]]) { // return element for new_array }[, thisarg]) parameters callback function that is called for every element of arr.
... the callback function accepts the following arguments: currentvalue the current element being processed in the array.
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Autoplay guide for media and Web Audio APIs - Web media technologies
Web › Media › Autoplay guide
autoplay blocking is not applied to <video> elements when the source media does not have an audio track, or if the audio track is muted.
... that means that both of the following are considered autoplay behavior, and are therefore subject to the browser's autoplay blocking policy: <audio src="/music.mp4" autoplay> and audioelement.play(); the following web features and apis may be affected by autoplay blocking: the html <audio> and <video> elements the web audio api from the user's perspective, a web page or app that spontaneously starts making noise without warning can be jarring, inconvenient, or off-putting.
... autoplay of media elements now that we've covered what autoplay is and what can prevent autoplay from being allowed, we'll look at how your web site or app can automatically play media upon page load, how to detect when autoplay fails to occur, and tips for coping when autoplay is denied by the browser.
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dominant-baseline - SVG: Scalable Vector Graphics
Web › SVG › Attribute › dominant-baseline
as a presentation attribute, it can be applied to any element but it only has effect on the text content elements, including: <altglyph>, <text>, <textpath>, <tref>, and <tspan> html, body, svg { height: 100%; } text { font: bold 14px verdana, helvetica, arial, sans-serif; } <svg viewbox="0 0 200 120" xmlns="http://www.w3.org/2000/svg"> <path d="m20,20 l180,20 m20,50 l180,50 m20,80 l180,80" stroke="grey" /> <text dominant-baseline="baseli...
...seline</text> <text dominant-baseline="middle" x="30" y="50">middle</text> <text dominant-baseline="hanging" x="30" y="80">hanging</text> </svg> usage notes value auto | text-bottom | alphabetic | ideographic | middle | central | mathematical | hanging | text-top default value auto animatable yes auto if this property occurs on a <text> element, then the computed value depends on the value of the writing-mode attribute.
... if this property occurs on a <tspan>, <tref>, <altglyph>, or <textpath> element, then the dominant-baseline and the baseline-table components remain the same as those of the parent text content element.
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Creating annotations - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Tutorials › Annotator › Creating annotations
we'll use two objects to create annotations: a page-mod to find page elements that the user can annotate, and a panel for the user to enter the annotation text itself.
... its main job is to maintain a matched element: this is the page element that is the current candidate for an annotation.
... the matched element is highlighted and has a click handler bound to it which sends a message to the main add-on code.
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Drag and Drop Example - Archive of obsolete content
Archive › Mozilla › Drag and drop › Drag and Drop Example
dragging elements around here, we'll create a simple board where items from a palette can be dragged onto the board.
... the user can click on one of several xul elements on the palette and drag it onto a stack element to create an element of a particular type.
...the board will be created using a stack element.
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XBL Example - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › XBL Example
« previousnext » this section will describe an example xbl element.
... a slideshow element let's construct a full example of an xbl element.
...we'll call this a slideshow element.
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colorpicker - Archive of obsolete content
Archive › Mozilla › XUL › colorpicker
attributes disabled, color, onchange, preference, tabindex, type properties accessibletype, color, disabled, open, tabindex, value examples <colorpicker/> attributes disabled type: boolean indicates whether the element is disabled or not.
... if this attribute is set, the element is disabled.
... disabled elements are usually drawn with grayed-out text.
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command - Archive of obsolete content
Archive › Mozilla › XUL › command
« xul reference home [ examples | attributes | properties | methods | related ] a command element can be used to invoke an operation that can come from multiple sources.
...typically, this will be the currently focused element.
... like a broadcaster, commands forward attributes to other elements.
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listcell - Archive of obsolete content
Archive › Mozilla › XUL › listcell
attributes crop, disabled, image, label, type properties disabled style classes listcell-iconic, examples (example needed) attributes crop type: one of the values below if the label of the element is too big to fit in its given space, the text will be cropped on the side specified by the crop attribute.
... depending on the platform and theme being used, some elements will have set a maximum width so they will always appear cropped.
...for example, for a menuitem in a menu you can add the following css rule when you want to use the value none: menupopup > menuitem, menupopup > menu { max-width: none; } disabled type: boolean indicates whether the element is disabled or not.
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notificationbox - Archive of obsolete content
Archive › Mozilla › XUL › notificationbox
« xul reference home [ examples | attributes | properties | methods | related ] the notificationbox element is used to display notifications above an element.
... typically the element will be a browser, but any element may be used.
... the notification element is used for each notification, and will be created automatically for each item.
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treecol - Archive of obsolete content
Archive › Mozilla › XUL › treecol
you can also place splitter elements between the columns to allow column resizing.
... you should always place an id attribute on a treecol element to ensure that the column positioning is handled properly.
... attributes crop type: one of the values below if the label of the element is too big to fit in its given space, the text will be cropped on the side specified by the crop attribute.
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Audio for Web games - Game development
Games › Techniques › Audio for Web Games
the htmlmediaelement interface comes with lots of properties to help determine whether a track is in a state to be playable.
...although the situation is soon going to get better with the adoption of the web audio api, the current most widely-supported method — using the vanilla <audio> element — leads to patchy results on mobile devices.
... element — results in patchy results on mobile devices.
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Combinators - Learn web development
Learn › CSS › Building blocks › Selectors › Combinators
descendant combinator the descendant combinator — typically represented by a single space ( ) character — combines two selectors such that elements matched by the second selector are selected if they have an ancestor (parent, parent's parent, parent's parent's parent, etc) element matching the first selector.
... body article p in the example below, we are matching only the <p> element which is inside an element with a class of .box.
...it matches only those elements matched by the second selector that are the direct children of elements matched by the first.
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Sizing items in CSS - Learn web development
Learn › CSS › Building blocks › Sizing items in CSS
understanding how big the different features in your design will be is important, and in this lesson we will summarize the various ways elements get a size via css and define a few terms around sizing that will help you in the future.
... the natural or intrinsic size of things html elements have a natural size, set before they are affected by any css.
...this is the collapsed border on the element — there is no content to hold it open.
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Debugging HTML - Learn web development
Learn › HTML › Introduction to HTML › Debugging HTML
and html's element syntax is arguably a lot easier to understand than a "real programming language" like rust, javascript, or python.
... <ul> <li>unclosed elements: if an element is <strong>not closed properly, then its effect can spread to areas you didn't intend <li>badly nested elements: nesting elements properly is also very important for code behaving correctly.
...let's look at an example: <a href="https://www.mozilla.org/>link to mozilla homepage</a> </ul> let's review the problems: the paragraph and list item elements have no closing tags.
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Responsive images - Learn web development
Learn › HTML › Multimedia and embedding › Responsive images
objective: learn how to use features like srcset and the <picture> element to implement responsive image solutions on websites.
... the content images have been set so that if the body element becomes smaller than the image, the images start to shrink so that they always stay inside the body, rather than overflowing it.
...vector images are great for simple graphics, patterns, interface elements, etc., but it starts to get very complex to create a vector-based image with the kind of detail that you'd find in say, a photo.
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Accessibility in React - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › React accessibility
this outline is your visual indicator that the browser is currently focused on this element.
... when we switch between templates in our <todo /> component, we completely remove the elements that were there before to replace them with something else.
... that means the element that we were focused on vanishes, and nothing is in focus at all.
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Setting up your own test automation environment - Learn web development
Learn › Tools and testing › Cross browser testing › Your own automation environment
there are other ways, but the best way to use selenium is via webdriver, a powerful api that builds on top of selenium and makes calls to a browser to automate it, carrying out actions such as "open this web page", "move over this element on the page", "click this link", "see whether the link opens this url", etc.
... create a new file inside your project directory called google_test.js: give it the following contents, then save it: const webdriver = require('selenium-webdriver'), by = webdriver.by, until = webdriver.until; const driver = new webdriver.builder() .forbrowser('firefox') .build(); driver.get('http://www.google.com'); driver.findelement(by.name('q')).sendkeys('webdriver'); driver.sleep(1000).then(function() { driver.findelement(by.name('q')).sendkeys(webdriver.key.tab); }); driver.findelement(by.name('btnk')).click(); driver.sleep(2000).then(function() { driver.gettitle().then(function(title) { if(title === 'webdriver - google search') { console.log('test passed'); } else { console.log('test failed'); ...
...: const webdriver = require('selenium-webdriver'), by = webdriver.by, until = webdriver.until; let driver_fx = new webdriver.builder() .forbrowser('firefox') .build(); let driver_chr = new webdriver.builder() .forbrowser('chrome') .build(); searchtest(driver_fx); searchtest(driver_chr); function searchtest(driver) { driver.get('http://www.google.com'); driver.findelement(by.name('q')).sendkeys('webdriver'); driver.sleep(1000).then(function() { driver.findelement(by.name('q')).sendkeys(webdriver.key.tab); }); driver.findelement(by.name('btnk')).click(); driver.sleep(2000).then(function() { driver.gettitle().then(function(title) { if(title === 'webdriver - google search') { console.log('test passed'); } else { console.
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JS::CompileOptions
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS::CompileOptions
methods of js::owningcompileoptions method description jsobject *element() const returns the dom element to which this source code belongs, if any, or null if it belongs to no dom element.
... source belongs to a dom element in the following cases: source belongs to a <script> element if it is the element's text content (that is, it is written out as the body of the <script> element in the markup text), or is the source document referenced by its src attribute.
... source belongs to a dom element if it is an event handler content attribute (that is, if it is written out in the markup text as an attribute value).
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Debugger.Source - Firefox Developer Tools
Tools › Debugger-API › Debugger.Source
for example, an html document can contain javascript in multiple <script> elements and event handler content attributes.
... in this case, there may be either a single debugger.source instance for the entire html document, with each debugger.script referring to its substring of the document; or there may be a separate debugger.source instance for each <script> element and attribute.
...source may be loaded from a url in the following ways: the url may appear as the src attribute of a <script> element in markup text.
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Migrating from Firebug - Firefox Developer Tools
Tools › Migrating from Firebug
to open it to inspect an element it is possible to press ctrl+shift+c / cmd+opt+c.
... copy html and related information firebug's html panel allows to copy the inner and outer html of an element as well as the css and xpath to it via the context menu of an element.
... edit css both tools allow to view and edit the css rules related to the element selected within the node view in a similar way.
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Edit fonts - Firefox Developer Tools
Tools › Page Inspector › How to › Edit fonts
the fonts tab has three major sections: "fonts used" by the currently inspected element.
... fonts used the top section of the font editor shows the fonts used by the currently inspected element, grouped by font family.
... fonts are considered "used" when there is text content in the inspected element that has the font applied to it.
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Examine and edit CSS - Firefox Developer Tools
Tools › Page Inspector › How to › Examine and edit CSS
examine css rules the rules view lists all the rules that apply to the selected element, ordered from most-specific to least-specific: the four buttons on the right top of the rules view allow you to change the display of certain css and rules view features.
... highlight matched elements: next to the selector is a target icon: click this to highlight all nodes in the page that match this selector.
... inactive rules (not shown): if a rule is inactive (e.g., padding on a :visited pseudo-element), it is colored gray, with an info icon that gives more information when clicked.
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Constraint validation API - Web APIs
Web › API › Constraint validation
validation of constraints through the constraint validation api is done either on a single form element or at the form level, on the <form> element itself.
... constraint validation interfaces validitystate the validitystate interface represents the validity states that a form control element can have, with respect to its defined constraints.
... together, they help explain whether and why an element's value fails to validate.
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Keyboard - Accessibility
Web › Accessibility › Understanding WCAG › Keyboard
focusable elements should have interactive semantics if an element can be focused using the keyboard, then it should be interactive; that is, the user should be able to do something to it and produce a change of some kind (for example, activating a link or changing an option).
... note: one important exception to this rule is if the element has role="document" applied to it, inside an interactive context (such as role="application").
... most interactive elements are focusable by default; you can make an element focusable by adding a tabindex=0 attribute value to it.
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Using CSS animations - CSS: Cascading Style Sheets
Web › CSS › CSS Animations › Using CSS animations
configuring the animation to create a css animation sequence, you style the element you want to animate with the animation property or its sub-properties.
... animation-delay configures the delay between the time the element is loaded and the beginning of the animation sequence.
...each keyframe describes how the animated element should render at a given time during the animation sequence.
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CSS values and units - CSS: Cascading Style Sheets
Web › CSS › CSS Values and Units
the inherit keyword represents the computed value of the property on the element’s parent, provided it is inherited.
...for example, em is relative to the font size on the element and vh is relative to the viewport height.
... relative length units unit relative to em font size of the element.
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Layout and the containing block - CSS: Cascading Style Sheets
Web › CSS › Containing block
the size and position of an element are often impacted by its containing block.
... most often, the containing block is the content area of an element's nearest block-level ancestor, but this is not always the case.
... in this article, we examine the factors that determine an element's containing block.
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CSS reference - CSS: Cascading Style Sheets
Web › CSS › Reference
use this css reference to browse an alphabetical index of all of the standard css properties, pseudo-classes, pseudo-elements, data types, and at-rules.
...where : selectors-list ::= selector[:pseudo-class] [::pseudo-element] [, selectors-list] properties-list ::= [property : value] [; properties-list] see the index of selectors, pseudo-classes, and pseudo-elements below.
...ecolumn-rule-widthcolumn-spancolumn-widthcolumnsconic-gradient()containcontentcontrast()<counter>counter-incrementcounter-resetcounter-set@counter-stylecounters()cross-fade()cubic-bezier()::cue::cue-regioncursor<custom-ident>d:defaultdeg<dimension>:dirdirection:disableddisplay<display-box><display-inside><display-internal><display-legacy><display-listitem><display-outside>dpcmdpidppxdrop-shadow()eelement()ellipse()em:emptyempty-cells:enabledenv()exffallback (@counter-style)filter<filter-function>:first:first-child::first-letter (:first-letter)::first-line (:first-line):first-of-typefit-content()<flex>flexflex-basisflex-directionflex-flowflex-growflex-shrinkflex-wrapfloat:focusfont@font-facefont-familyfont-family (@font-face)font-feature-settingsfont-feature-settings (@font-face)@font-feature-valu...
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clear - CSS: Cascading Style Sheets
Web › CSS › clear
the clear css property sets whether an element must be moved below (cleared) floating elements that precede it.
... the clear property applies to floating and non-floating elements.
... when applied to non-floating blocks, it moves the border edge of the element down until it is below the margin edge of all relevant floats.
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right - CSS: Cascading Style Sheets
Web › CSS › right
the right css property participates in specifying the horizontal position of a positioned element.
... it has no effect on non-positioned elements.
... syntax /* <length> values */ right: 3px; right: 2.4em; /* <percentage>s of the width of the containing block */ right: 10%; /* keyword value */ right: auto; /* global values */ right: inherit; right: initial; right: unset; values <length> a negative, null, or positive <length> that represents: for absolutely positioned elements, the distance to the right edge of the containing block.
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<form> - HTML: Hypertext Markup Language
Web › HTML › Element › form
the html <form> element represents a document section containing interactive controls for submitting information.
... it is possible to use the :valid and :invalid css pseudo-classes to style a <form> element based on whether or not the elements inside the form are valid.
... content categories flow content, palpable content permitted content flow content, but not containing <form> elements tag omission none, both the starting and ending tag are mandatory.
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<input type="date"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › date
<input> elements of type="date" create input fields that let the user enter a date, either with a textbox that validates the input or a special date picker interface.
... you can get and set the date value in javascript with the input element's value and valueasnumber properties.
... for example: var datecontrol = document.queryselector('input[type="date"]'); datecontrol.value = '2017-06-01'; console.log(datecontrol.value); // prints "2017-06-01" console.log(datecontrol.valueasnumber); // prints 1496275200000, a unix timestamp this code finds the first <input> element whose type is date, and sets its value to 2017-06-01 (june 1st, 2017).
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<input type="email"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › email
<input> elements of type email are used to let the user enter and edit an e-mail address, or, if the multiple attribute is specified, a list of e-mail addresses.
... value a domstring representing an e-mail address, or empty events change and input supported common attributes autocomplete, list, maxlength, minlength, multiple, name,pattern, placeholder, readonly, required, size, and type idl attributes list and value methods select() value the <input> element's value attribute contains a domstring which is automatically validated as conforming to e-mail syntax.
... additional attributes in addition to the attributes that operate on all <input> elements regardless of their type, email inputs support the following attributes: attribute description list the id of the <datalist> element that contains the optional pre-defined autocomplete options maxlength the maximum number of characters the input should accept minlength the minimum number of characters long the input can be and still be conside...
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<input type="month"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › month
<input> elements of type month create input fields that let the user enter a month and year allowing a month and year to be easily entered.
... you can also get and set the date value in javascript using the htmlinputelement.value property, for example: <label for="bday-month">what month were you born in?</label> <input id="bday-month" type="month" name="bday-month" value="2017-06"> var monthcontrol = document.queryselector('input[type="month"]'); monthcontrol.value = '1978-06'; additional attributes in addition to the attributes common to <input> elements, month inputs offer the following attributes: ...
... attribute description list the id of the <datalist> element that contains the optional pre-defined autocomplete options max the latest year and month to accept as a valid input min the earliest year and month to accept as a valid input readonly a boolean which, if present, indicates that the input's value can't be edited step a stepping interval to use when incrementing and decrementing the value of the input field list the values of the list attribute is the id of a <datalist> element located in the same document.
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<keygen> - HTML: Hypertext Markup Language
Web › HTML › Element › keygen
the html <keygen> element exists to facilitate generation of key material, and submission of the public key as part of an html form.
...it is expected that the <keygen> element will be used in an html form along with other information needed to construct a certificate request, and that the result of the process will be a signed certificate.
... content categories flow content, phrasing content, interactive content, listed, labelable, submittable, resettable form-associated element, palpable content.
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Array.prototype.every() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › every
the every() method tests whether all elements in the array pass the test implemented by the provided function.
... syntax arr.every(callback(element[, index[, array]])[, thisarg]) parameters callback a function to test for each element, taking three arguments: element the current element being processed in the array.
... index optional the index of the current element being processed in the array.
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Array.prototype.filter() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › filter
the filter() method creates a new array with all elements that pass the test implemented by the provided function.
... syntax let newarray = arr.filter(callback(element[, index, [array]])[, thisarg]) parameters callback function is a predicate, to test each element of the array.
... return true to keep the element, false otherwise.
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Array.prototype.find() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › find
the find() method returns the value of the first element in the provided array that satisfies the provided testing function.
... if you need the index of the found element in the array, use findindex().
...(it’s similar to findindex(), but checks each element for equality with the value instead of using a testing function.) if you need to find if a value exists in an array, use array.prototype.includes().
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HTML to DOM - Archive of obsolete content
Archive › Add-ons › Code snippets › HTML to DOM
the function below will safely parse simple html and return a dom object which can be manipulated like web page elements.
...it will also remove all javascript, including element attributes that contain javascript.
... function htmlparser(ahtmlstring){ var html = document.implementation.createdocument("http://www.w3.org/1999/xhtml", "html", null), body = document.createelementns("http://www.w3.org/1999/xhtml", "body"); html.documentelement.appendchild(body); body.appendchild(components.classes["@mozilla.org/feed-unescapehtml;1"] .getservice(components.interfaces.nsiscriptableunescapehtml) .parsefragment(ahtmlstring, false, null, body)); return body; } it works by creating a content-level (this is safer than chrome-level) <div> in the current page, then parsing the html fragment and attaching that fragment to the <div>.
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Interaction between privileged and non-privileged pages - Archive of obsolete content
Archive › Add-ons › Interaction between privileged and non-privileged pages
to trigger the alert() in the listener and pass the data from the web page, write code such as this in the web page: var element = document.createelement("myextensiondataelement"); element.setattribute("attribute1", "foobar"); element.setattribute("attribute2", "hello world"); document.documentelement.appendchild(element); var evt = document.createevent("events"); evt.initevent("myextensionevent", true, false); element.dispatchevent(evt); this code creates an arbitrary element -- <myextensiondataelement/> -- and inserts...
...values are set for two arbitrary attributes on the element.
...the event bubbles up from the web page and reaches the extension (privileged code) where your listener catches it and reads the attribute values from the dom element where the event originated.
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Adding sidebars - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › Adding sidebars
one minor difference is that the xul sidebar should be defined using the « xul reference « root element instead of window or dialog.
...for this purpose we'll also look at some handy xul elements in this section.
... the tabbox element the « xul reference « element creates a tabbed view of one or more tabpanel elements.
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Creating a Help Content Pack - Archive of obsolete content
Archive › Mozilla › Help viewer › Creating a Help Content Pack
if you understand the basics of html or (preferably) xml, you'll understand the very basics of the syntax - elements, attributes, and element contents.
...insert into it the following text: <?xml version="1.0"?> <rdf:rdf xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:nc="http://home.netscape.com/nc-rdf#"> </rdf:rdf> if you're familiar with html or xml, you might recognize this as the container element for the whole document.
... next, you'll need to insert a rdf:description element into the file, inside the rdf:rdf element just created: <rdf:description rdf:about="urn:root" nc:title="" nc:defaulttopic="" nc:base=""> </rdf:description> fill in the attributes as follows: rdf:about must be urn:root or your pack won't work.
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Dynamically modifying XUL-based user interface - Archive of obsolete content
Archive › Mozilla › XUL › Dynamically modifying XUL-based user interface
the most well known dom method is probably document.getelementbyid(), which returns an element, given its id.
... you may also have used other calls, such as element.setattribute(), or, if you wrote an extension, the addeventlistener() method.
...there are also dom methods that create, move, or delete elements from a document.
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Actions - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Actions
« previousnext » the content to generate in a template is specified using the <xul:action> element which should either be the next sibling of the <xul:query> element (if no rules need be specified) or be a direct child of a <xul:rule> element.
... the content to generate goes directly inside the action element.
...f" ref="http://www.xulplanet.com/rdf/a"> <template> <query> <content uri="?start"/> <triple subject="?start" predicate="http://www.xulplanet.com/rdf/relateditem" object="?relateditem"/> </query> <action> <button uri="?relateditem" label="?relateditem"/> </action> </template> </vbox> in this example, we omit the <xul:rule> element around the <xul:action> as it is optional when we want to generate content unconditionally.
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Adding Labels and Images - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Adding Labels and Images
in addition, we look at how to include elements into groups.
... text elements you cannot embed text directly into a xul file without tags around it and expect it to be displayed.
... you can use two xul elements for this purpose.
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XUL Questions and Answers - Archive of obsolete content
Archive › Mozilla › XUL › XUL Questions and Answers
overlaying elements without ids the original developers only tend to put ids where they need them.
... as an extension author, you have at least two options: use dom methods to dynamically create or rearrange elements file an enhancement request in bugzilla to have extra ids added.
...json string) from the server, parsing it on client, and building the menupopup using dom methods (such as document.createelementns).
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browser - Archive of obsolete content
Archive › Mozilla › XUL › browser
« xul reference home [ examples | attributes | properties | methods | related ] a xul <browser> element represents a frame which is expected to contain a view of a web document.
... autocompletepopup type: id the id of a popup element used to hold autocomplete results for the element.
... droppedlinkhandler type: function this function is called when links are dropped to the browser element, with the following arguments.
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datepicker - Archive of obsolete content
Archive › Mozilla › XUL › datepicker
attributes disabled, firstdayofweek, readonly, type, tabindex, value properties date, dateleadingzero, datevalue, disabled, month, monthleadingzero, open, readonly, tabindex, value, year, yearleadingzero examples <datepicker type="grid" value="2007-03-26"/> attributes disabled type: boolean indicates whether the element is disabled or not.
... if this attribute is set, the element is disabled.
... disabled elements are usually drawn with grayed-out text.
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timepicker - Archive of obsolete content
Archive › Mozilla › XUL › timepicker
ributes disabled, hideseconds, increment, readonly, tabindex, value properties amindicator, datevalue, disabled, hideseconds, hour, hourleadingzero, increment, is24hourclock, ispm, minute, minuteleadingzero, pmindicator, readonly, second, secondleadingzero, tabindex, value examples <timepicker value="12:05"/> attributes disabled type: boolean indicates whether the element is disabled or not.
... if this attribute is set, the element is disabled.
... disabled elements are usually drawn with grayed-out text.
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Building up a basic demo with A-Frame - Game development
Games › Techniques › 3D on the web › Building up a basic demo with A-Frame
the <script> element includes the a-frame framework in the page; we will write our example code inside the <body> element.
... note: an entity is any element — it can be an object like a box, cylinder or cone, but it can also be a camera, light or sound source.
... let's create the scene by adding an <a-scene> element inside the <body> element: <a-scene> </a-scene> adding a cube adding the cube to the scene is done by adding a simple <a-box> element inside the <a-scene> element.
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HTML table basics - Learn web development
Learn › HTML › Tables › Basics
tables are not automatically responsive: when you use proper layout containers (such as <header>, <section>, <article>, or <div>), their width defaults to 100% of their parent element.
... the smallest container inside a table is a table cell, which is created by a <td> element ('td' stands for 'table data').
...each <td> element creates a single cell and together they make up the first row.
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What is JavaScript? - Learn web development
Learn › JavaScript › First steps › What is JavaScript
audio and video apis like htmlmediaelement and webrtc allow you to do really interesting things with multimedia, such as play audio and video right in a web page, or grab video from your web camera and display it on someone else's computer (try our simple snapshot demo to get the idea).
...whereas css uses <link> elements to apply external stylesheets and <style> elements to apply internal stylesheets to html, javascript only needs one friend in the world of html — the <script> element.
... next, go to your text editor and add the following in your head — just before your closing </head> tag: <script> // javascript goes here </script> now we'll add some javascript inside our <script> element to make the page do something more interesting — add the following code just below the "// javascript goes here" line: document.addeventlistener("domcontentloaded", function() { function createparagraph() { let para = document.createelement('p'); para.textcontent = 'you clicked the button!'; document.body.appendchild(para); } const buttons = document.queryselectorall('butto...
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Focus management with Vue refs - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Vue refs focus management
virtual dom and refs vue, like some other frameworks, uses a virtual dom (vdom) to manage elements.
...however, it also means you often should not edit your html elements directly through native browser apis (like document.getelementbyid) when using frameworks, because it results in the vdom and real dom going out of sync.
... to use a ref in a component, you add a ref attribute to the element that you want to access, with a string identifier for the value of the attribute.
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Using the Browser API
Mozilla › Gecko › Chrome › API › Browser API › Using
the html browser api is an extension of the html <iframe> element that allows web apps to implement browsers or browser-like applications.
... it consists of two major parts: custom <iframe> attributes: by adding a mozbrowser attribute to the <iframe> element we can make it appear like a top-level browser window to the embedded content.
... this means that window.top, window.parent, window.frameelement, etc.
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Bytecode Descriptions
Mozilla › Projects › SpiderMonkey › Internals › Bytecode
array literals newarray operands: (uint32_t length) stack: ⇒ array create and push a new array object with the given length, preallocating enough memory to hold that many elements.
... format: jof_ic initelemarray operands: (uint32_t index) stack: array, val ⇒ array initialize an array element array[index] with value val.
... val may be magicvalue(js_elements_hole).
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JIT Optimization Strategies
Mozilla › Projects › SpiderMonkey › JIT Optimization Strategies
optimization information is currently collected for the following operations: getproperty (obj.prop) setproperty (obj.prop = val) getelement (obj[elemname]) setelement (obj[elemname] = val) call (func(...)) at each operation site, ionmonkey tries a battery of strategies, from the most optimized but most restrictive to the least optimized but least restrictive.
... getelement getelem_typedobject attempts to optimized element accesses on array typed objects.
... getelem_dense attempts to optimize element accesses on densely packed array objects.
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JS::AutoVectorRooter
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS::AutoVectorRooter
bool append(const t &v) appends an element v to the array.
... bool appendall(const autovectorrooter<t> &other) appends all elements of other to the array.
... bool insert(t *p, const t &val) inserts an element val at the position specified by p.
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Shell global objects
Mozilla › Projects › SpiderMonkey › Shell global objects
enumber starting line number for error messages and debug info columnnumber starting column number for error messages and debug info global global in which to execute the code newcontext if true, create and use a new cx (default: false) catchtermination if true, catch termination (failure without an exception value, as for slow scripts or out-of-memory) and return 'terminated' element if present with value v, convert v to an object o and mark the source as being attached to the dom element o.
... if the property is omitted or v is null, don't attribute the source to any dom element.
... elementattributename if present and not undefined, the name of property of element that holds this code.
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Introduction to XPCOM for the DOM
Mozilla › Tech › XPCOM › Introduction to XPCOM for the DOM
here is a simple problem i encountered recently: in a member function of the nshtmlanchorelement class, i had to get a pointer to the nsicontent interface implemented by the nshtmlanchorelement object.
...for example, in idl we'd write getelementbyid, which in c++ would be translated to getelementbyid.
...for instance, we have the following "chain" for the nsidomhtmlanchorelement interface: nsisupports -> nsidomnode -> nsidomelement -> nsidomhtmlelement -> nsidomhtmlanchorelement.
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nsIArray
Mozilla › Tech › XPCOM › Reference › Interface › nsIArray
inherits from: nsisupports last changed in gecko 1.7 an indexed collection of elements.
... provides basic functionality for retrieving elements at a specific position, searching for elements.
... indexes are zero-based, such that the last element in the array is stored at the index length-1.
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Examples of web and XML development using the DOM - Web APIs
Web › API › Document Object Model › Examples
example 1: height and width the following example shows the use of the height and width properties alongside images of varying dimensions: <!doctype html> <html lang="en"> <head> <title>width/height example</title> <script> function init() { var arrimages = new array(3); arrimages[0] = document.getelementbyid("image1"); arrimages[1] = document.getelementbyid("image2"); arrimages[2] = document.getelementbyid("image3"); var objoutput = document.getelementbyid("output"); var strhtml = "<ul>"; for (var i = 0; i < arrimages.length; i++) { strhtml += "<li>image" + (i+1) + ": height=" + arrimages[i].height + ", width=" + arrimages[i].width + ", style.he...
...ght, width, but style="height: 50px; width: 500px;" <img id="image3" src="https://udn.realityripple.com/samples/d2/8ba7141ed1.gif" style="height: 50px; width: 500px;"> </p> <div id="output"> </div> </body> </html> example 2: image attributes <!doctype html> <html lang="en"> <head> <title>modifying an image border</title> <script> function setborderwidth(width) { document.getelementbyid("img1").style.borderwidth = width + "px"; } </script> </head> <body> <p> <img id="img1" src="image1.gif" style="border: 5px solid green;" width="100" height="100" alt="border test"> </p> <form name="formname"> <input type="button" value="make border 20px-wide" onclick="setborderwidth(20);" /> <input type="button" value="make border 5px-wide" onclick="setborderwid...
...th(5);" /> </form> </body> </html> example 3: manipulating styles in this simple example, some basic style properties of an html paragraph element are accessed using the style object on the element and that object's css style properties, which can be retrieved and set from the dom.
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HTML Drag and Drop API - Web APIs
Web › API › HTML Drag and Drop API
the user may select draggable elements with a mouse, drag those elements to a droppable element, and drop them by releasing the mouse button.
... a translucent representation of the draggable elements follows the pointer during the drag operation.
... for web sites, extensions, and xul applications, you can customize which elements can become draggable, the type of feedback the draggable elements produce, and the droppable elements.
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window.location - Web APIs
Web › API › Window › location
example #6: using bookmarks without changing the hash property: <!doctype html> <html> <head> <meta charset="utf-8"/> <title>mdn example</title> <script> function shownode (onode) { document.documentelement.scrolltop = onode.offsettop; document.documentelement.scrollleft = onode.offsetleft; } function showbookmark (sbookmark, busehash) { if (arguments.length === 1 || busehash) { location.hash = sbookmark; return; } var obookmark = document.queryselector(sbookmark); if (obookmark) { shownode(obookmark); } } </script> <style> span.intlink { cursor: pointer; color: #0000ff; text-de...
...curabitur elementum nisi a eros rutrum nec blandit diam placerat.
...nullam tortor nunc, elementum a consectetur et, ultrices eu orci.
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ARIA: textbox role - Accessibility
Web › Accessibility › ARIA › Roles › textbox role
the textbox role is used to identify an element that allows the input of free-form text.
... whenever possible, rather than using this role, use an <input> element with type="text", for single-line input, or a <textarea> element for multi-line input.
... description when an element has the textbox role, the browser sends an accessible textbox event to assistive technologies, which can then notify the user about it.
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font-size - CSS: Cascading Style Sheets
Web › CSS › font-size
ont-size: smaller; font-size: larger; /* <length> values */ font-size: 12px; font-size: 0.8em; /* <percentage> values */ font-size: 80%; /* global values */ font-size: inherit; font-size: initial; font-size: unset; the font-size property is specified in one of the following ways: as one of the absolute-size or relative-size keywords as a <length> or a <percentage>, relative to the parent element's font size values xx-small, x-small, small, medium, large, x-large, xx-large, xxx-large absolute-size keywords, based on the user's default font size (which is medium).
...the font will be larger or smaller relative to the parent element's font size, roughly by the ratio used to separate the absolute-size keywords above.
...for most font-relative units (such as em and ex), the font size is relative to the parent element's font size.
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<length> - CSS: Cascading Style Sheets
Web › CSS › length
font-relative lengths font-relative lengths define the <length> value in terms of the size of a particular character or font attribute in the font currently in effect in an element or its parent.
... cap represents the "cap height" (nominal height of capital letters) of the element’s font.
... ch represents the width, or more precisely the advance measure, of the glyph "0" (zero, the unicode character u+0030) in the element's font.
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Audio and video manipulation - Developer guides
Web › Guide › Audio and video manipulation
video and canvas the <canvas> element provides a surface for drawing graphics onto web pages; it is very powerful and can be coupled tightly with video.
... the general technique is to: write a frame from the <video> element to an intermediary <canvas> element.
... read the data from the intermediary <canvas> element and manipulate it.
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<input type="file"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › file
<input> elements with type="file" let the user choose one or more files from their device storage.
... events change and input supported common attributes required additional attributes accept, capture, files, multiple idl attributes files and value dom interface htmlinputelement properties properties that apply only to elements of type file methods select() value a file input's value attribute contains a domstring that represents the path to the selected file(s).
...the other files can be identified using the input's htmlinputelement.files property.
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<input type="search"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › search
<input> elements of type search are text fields designed for the user to enter search queries into.
...you can retrieve this using the htmlinputelement.value property in javascript.
... additional attributes in addition to the attributes that operate on all <input> elements regardless of their type, search field inputs support the following attributes: attribute description list the id of the <datalist> element that contains the optional pre-defined autocomplete options maxlength the maximum number of characters the input should accept minlength the minimum number of characters long the input can be and still be considered valid pattern a regular expression the input's contents must match in order to be valid placeholder ...
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<th> - HTML: Hypertext Markup Language
Web › HTML › Element › th
the html <th> element defines a cell as header of a group of table cells.
... the end tag may be omitted, if it is immediately followed by a <th> or <td> element or if there are no more data in its parent element.
... permitted parents a <tr> element.
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itemprop - HTML: Hypertext Markup Language
Web › HTML › Global attributes › itemprop
every html element can have an itemprop attribute specified, and an itemprop consists of a name-value pair.
...property values are either a string or a url and can be associated with a very wide range of elements including <audio>, <embed>, <iframe>, <img>, <link>, <object>, <source> , <track>, and <video>.
... examples the example below shows the source for a set of elements marked up with itemprop attributes, followed by a table showing the resulting structured data.
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Array.prototype.findIndex() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › findIndex
the findindex() method returns the index of the first element in the array that satisfies the provided testing function.
... otherwise, it returns -1, indicating that no element passed the test.
... see also the find() method, which returns the value of an array element, instead of its index.
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Array.prototype.some() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › some
the some() method tests whether at least one element in the array passes the test implemented by the provided function.
... syntax arr.some(callback(element[, index[, array]])[, thisarg]) parameters callback a function to test for each element, taking three arguments: element the current element being processed in the array.
... indexoptional the index of the current element being processed in the array.
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Array.prototype.toLocaleString() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › toLocaleString
the tolocalestring() method returns a string representing the elements of the array.
... the elements are converted to strings using their tolocalestring methods and these strings are separated by a locale-specific string (such as a comma “,”).
... return value a string representing the elements of the array.
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display - SVG: Scalable Vector Graphics
Web › SVG › Attribute › display
the display attribute lets you control the rendering of graphical or container elements.
... a value of display="none" indicates that the given element and its children will not be rendered.
... any value other than none or inherit indicates that the given element will be rendered by the browser.
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Adding Toolbars and Toolbar Buttons - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › Adding Toolbars and Toolbar Buttons
--> </overlay> one detail that is easy to overlook is the fact that the toolbarpalette element is outside of the window element.
... if you put the toolbarpalette element inside the window element in your overlay, some weird errors will begin to happen.
...in the case of a toolbaritem element (discussed later), use the title attribute instead of label.
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Adding windows and dialogs - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › Adding windows and dialogs
the dialog element when the prompt service is not enough, you'll have to create you own xul dialogs.
... luckily, you still get a great deal of help from the platform if you use the dialog element as the document root instead of the more generic window element.
... the dialog element handles all of this transparently.
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CSS3 - Archive of obsolete content
Archive › CSS3
pseudo-elements are now characterized by two colons rather than one: :after becomes ::after, :before becomes ::before, :first-letter becomes ::first-letter, and :first-line becomes ::first-line.
... media queries are not only used in css document but also in some attributes of html elements, like the media attribute of the <link> element.
... allow the styling of forms according their content using the css :indeterminate, :default, :valid, :invalid, :in-range, :out-of-range, :required, :optional, :read-only, and :read-write pseudo-classes and the ::value, ::choices, ::repeat-item, and ::repeat-index pseudo-elements.
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Style System Overview - Archive of obsolete content
Archive › Mozilla › Firefox › Style System Overview
selector matches elements in the document.
... rule applies to matched elements.
... “cascaded” value for property + element: if 0 rules matching the element have the property: some properties inherit and some properties use initial value.
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Special Condition Tests - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Special Condition Tests
templates have a means of allowing a rule to match only if the generated content would be inserted inside an element with a particular tag name.
... for instance, if the container was a <vbox>, a rule could be created that would only match a <vbox> element.
...for the bookmarks toolbar, the outer content is inserted into an <hbox>, but at lower levels, the content will be inserted into a <menu> in case you aren't clear, the tag that must match for the outer iteration is the root element, the one with the datasources attribute on it.
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Input Controls - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Input Controls
« previousnext » xul has elements that are similar to the html form controls.
... text entry fields html has an input element which can be used for text entry controls.
... xul has a similar element, textbox, used for text entry fields.
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Using the Editor from XUL - Archive of obsolete content
Archive › Mozilla › XUL › Using the editor from XUL
overview the editor in xul lives on top of a xul <iframe> element; it observes document loading in this <iframe>, and, when document loading is complete, it instantiates an editor on the loaded document.
... note that the <editor> element is really just an <iframe> which takes over some of the task of creating the editor from javascript.
...you can find the relevant xul parts in editor.xul, the javascript parts in editor.js, and the xbl binding for the editor element in editor.xml.
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iframe - Archive of obsolete content
Archive › Mozilla › XUL › iframe
« xul reference home [ examples | attributes | properties | methods | related ] an inner frame that works much like the html <iframe> element.
...if you want to run content in a remote process, use a xul browser element.
...label="mozilla" value="http://mozilla.org" /> <menuitem label="slashdot" value="http://slashdot.org"/> <menuitem label="sourceforge" value="http://sf.net" /> <menuitem label="freshmeat" value="http://freshmeat.net"/> </menupopup> </menulist> <iframe id="myframe" flex="1"/> <script> function donav(obj) { var url = obj.selecteditem.value; // note the firstchild is the menupopup element document.getelementbyid('myframe').setattribute('src', url); } </script> attributes showcaret type: boolean whether or not to cause a typing caret to be visible in the content area.
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listhead - Archive of obsolete content
Archive › Mozilla › XUL › listhead
it is usual to place listheader elements inside the listhead, one for each column.
... attributes disabled properties acesssibletype, disabled examples (example needed) attributes disabled type: boolean indicates whether the element is disabled or not.
... if this attribute is set, the element is disabled.
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listheader - Archive of obsolete content
Archive › Mozilla › XUL › listheader
abel="occupation"/> </listhead> <listitem> <listcell label="george"/> <listcell label="house painter"/> </listitem> <listitem> <listcell label="mary ellen"/> <listcell label="candle maker"/> </listitem> <listitem> <listcell label="roger"/> <listcell label="swashbuckler"/> </listitem> </listbox> attributes disabled type: boolean indicates whether the element is disabled or not.
... if this attribute is set, the element is disabled.
... disabled elements are usually drawn with grayed-out text.
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tabbox - Archive of obsolete content
Archive › Mozilla › XUL › tabbox
« xul reference home [ examples | attributes | properties | methods | related ] a container used to display a set of tabbed pages of elements.
...the tabbox should contain two children, the first a tabs element which contains the tabs and the second a tabpanels element which contains the contents of the pages.
...down, handlectrltab properties accessibletype, eventnode, handlectrlpageupdown, handlectrltab, selectedindex, selectedpanel, selectedtab, tabs, tabpanels examples <tabbox id="mytablist" selectedindex="2"> <tabs> <tab label="a first tab"/> <tab label="second tab"/> <tab label="another tab"/> <tab label="last tab"/> </tabs> <tabpanels> <tabpanel><!-- tabpanel first elements go here --></tabpanel> <tabpanel><!-- tabpanel second elements go here --></tabpanel> <tabpanel><button label="click me"/></tabpanel> <tabpanel><!-- tabpanel fourth elements go here --></tabpanel> </tabpanels> </tabbox> attributes eventnode type: one of the values below indicates where keyboard navigation events are listened to.
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toolbar - Archive of obsolete content
Archive › Mozilla › XUL › toolbar
these are toolbars that are not children of a toolbox element.
...this only has an effect on windows and needs to be combined with type="menubar" and a menubar element.
... height type: string (representing an integer) the preferred height of the element in pixels.
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window - Archive of obsolete content
Archive › Mozilla › XUL › window
disablefastfindtype: booleanput disablefastfind="true" on the root element of a xul document, which is intended to be loaded in a tab, to disable the find bar for the tab with this document.
...this is supported only from window elements, and is ignored on platforms that don't support drawing into the title bar.
... height type: string (representing an integer) the preferred height of the element in pixels.
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nsIContentPolicy - Archive of obsolete content
Archive › Mozilla › nsIContentPolicy
type_image 3 indicates an image (for example, <img> elements).
... type_stylesheet 4 indicates a stylesheet (for example, <style> elements).
... type_subdocument 7 indicates a document contained within another document (for example, <iframe> and <frame> elements).
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Adobe Flash - Archive of obsolete content
Archive › Plugins › Scripting Plugins Adobe Flash
using the right html the object element or the embed element can be used to invoke plugins in netscape gecko browsers.
... the former is part of the w3c html 4 standard, whereas the latter is a deprecated element, as discussed in using the right markup to invoke plugins.
... however, if you wish to use fscommands with the flash plugin to call javascript functions in an html page, then you must use the embed element, as discussed further in the section on fscommands.
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CSS selectors - Learn web development
Learn › CSS › Building blocks › Selectors
previous overview: building blocks next in css, selectors are used to target the html elements on our web pages that we want to style.
... there are a wide variety of css selectors available, allowing for fine-grained precision when selecting elements to style.
...it is a pattern of elements and other terms that tell the browser which html elements should be selected to have the css property values inside the rule applied to them.
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Styling tables - Learn web development
Learn › CSS › Building blocks › Styling tables
this is why we've selected the four different headings with the thead th:nth-child(n) (:nth-child) selector ("select the nth child that is a <th> element in a sequence, inside a <thead> element") and given them set percentage widths.
...by default, when you set borders on table elements, they will all have spacing between them, as the below image illustrates: this doesn't look very nice (although it might be the look you want, who knows?) with border-collapse: collapse; set, the borders collapse down into one, which looks much better: we've put a border around the whole table, which is needed because we'll be putting some borders round the table header and footer later on �...
... we've set some padding on the <th> and <td> elements — this gives the data items some space to breathe, making the table look a lot more legible.
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Flexbox - Learn web development
Learn › CSS › CSS layout › Flexbox
you'll see that we have a <header> element with a top level heading inside it, and a <section> element containing three <article>s.
... specifying what elements to lay out as flexible boxes to start with, we need to select which elements are to be laid out as flexible boxes.
... to do this, we set a special value of display on the parent element of the elements you want to affect.
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Floats - Learn web development
Learn › CSS › CSS layout › Floats
we'll start with a really simple example involving floating a block of text around an element.
...cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p> now apply the following css to your html (using a <style> element or a <link> to a separate .css file — your choice): body { width: 90%; max-width: 900px; margin: 0 auto; font: .9em/1.2 arial, helvetica, sans-serif } .box { width: 150px; height: 100px; border-radius: 5px; background-color: rgb(207,232,220); padding: 1em; } if you save and refresh now, you'll see something much like what you'd expect — the box is sitting above the text, ...
... natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus.</p> body { width: 90%; max-width: 900px; margin: 0 auto; font: .9em/1.2 arial, helvetica, sans-serif } .box { float: left; margin-right: 15px; width: 150px; height: 150px; border-radius: 5px; background-color: rgb(207,232,220); padding: 1em; } so let's think about how the float works — the element with the float set on it (the <div> element in this case) is taken out of the normal layout flow of the document and stuck to the left-hand side of its parent container (<body>, in this case).
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HTML Cheatsheet - Learn web development
Learn › HTML › Cheatsheet
inline elements an "element" is a single part of a webpage.
... some elements are large and hold smaller elements like containers.
... some elements are small and are "nested" inside larger ones.
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Images in HTML - Learn web development
Learn › HTML › Multimedia and embedding › Images in HTML
there are other types of multimedia to consider, but it is logical to start with the humble <img> element, used to embed a simple image in a webpage.
... in order to put a simple image on a webpage, we use the <img> element.
... this is an empty element (meaning that it has no text content or closing tag) that requires a minimum of one attribute to be useful — src (sometimes spoken as its full title, source).
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Client-side storage - Learn web development
Learn › JavaScript › Client-side web APIs › Client-side storage
note: in the line <script src="index.js" defer></script> of the source for our finished version, the defer attribute specifies that the contents of the <script> element will not execute until the page has finished loading.
...the javascript file contains five declared constants containing references to the <ul> element the notes will be displayed in, the title and body <input> elements, the <form> itself, and the <button>.
...add this to your code, below the previous function definition: // define the displaydata() function function displaydata() { // here we empty the contents of the list element each time the display is updated // if you didn't do this, you'd get duplicates listed each time a new note is added while (list.firstchild) { list.removechild(list.firstchild); } // open our object store and then get a cursor - which iterates through all the // different data items in the store let objectstore = db.transaction('notes_os').objectstore('notes_os'); objectstore.o...
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Getting started with React - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › React getting started
the jsx approach allows us to nest our elements within each other, just like we do with html: const header = ( <header> <h1>mozilla developer network</h1> </header> ); note: the parentheses in the previous snippet aren't unique to jsx, and don’t have any effect on your application.
...when compiled (using a tool like babel or parcel), our header expression would look like this: const header = react.createelement("header", null, react.createelement("h1", null, "mozilla developer network") ); it's possible to skip the compilation step and use react.createelement() to write your ui yourself.
... it's possible to add react to a website without create-react-app by copying some <script> elements into an html file, but the create-react-app cli is a common starting point for react applications.
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IME handling guide
Mozilla › IME handling guide
if ime is available on focused elements, we call that state "enabled".
... ecompositionchange new composition string widget (or textcomposition) must not be nullptr text ecompositioncommitasis n/a (must be empty) nobody nullptr none ecompositioncommit commit string widget (or textcomposition) nullptr none presshell presshell receives the widget events and decides an event target from focused document and element.
...therefore, this class guarantees that all composition events for a composition are fired on same element.
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Building the WebLock UI
Mozilla › Tech › XPCOM › Guide › Creating components › Building the WebLock UI
in this tutorial, focusing as it is on the weblock functionality (rather than the ui), we'll assume the strings we get from the ui itself are urls we actually want to write to the white list: function addthissite() { var tf = document.getelementbyid("dialog.input"); // weblock is global and declared above weblock.addsite(tf.value); } this javascript function can be called directly from the xul widget, where the input string is retrieved as the value property of the textbox element.
...elements in the xul markup map to widgets in the interface that gecko renders in a fairly straightforward way - so, for instance, the root element of an application window is the element <window/>, the root element of the dialog we'll be creating here is <dialog/>, and so forth.
... within a xul application file, elements like <button/>, <menu/>, and <checkbox/> can be hooked up to an event model, to scripts, and to the xpcom interfaces that carry out a lot of the browser functionality in mozilla.
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Attr - Web APIs
Web › API › Attr
the attr interface represents one of a dom element's attributes as an object.
... in most dom methods, you will directly retrieve the attribute as a string (e.g., element.getattribute()), but certain functions (e.g., element.getattributenode()) or means of iterating return attr types.
... ownerelement read only the element holding the attribute.
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Background Tasks API - Web APIs
Web › API › Background Tasks API
this code draws any pending updates to the document currently being displayed, runs any javascript code the page needs to run, accepts events from input devices, and dispatches those events to the elements that should receive them.
... tachyon emissions...</div> <progress id="progress" value="0"></progress> <div class="button" id="startbutton"> start </div> <div class="label counter"> task <span id="currenttasknumber">0</span> of <span id="totaltaskcount">0</span> </div> </div> <div class="logbox"> <div class="logheader"> log </div> <div id="log"> </div> </div> the progress box uses a <progress> element to show the progress, along with a label with sections that are changed to present numeric information about the progress.
... let totaltaskcountelem = document.getelementbyid("totaltaskcount"); let currenttasknumberelem = document.getelementbyid("currenttasknumber"); let progressbarelem = document.getelementbyid("progress"); let startbuttonelem = document.getelementbyid("startbutton"); let logelem = document.getelementbyid("log"); next we have variables which reference the dom elements we need to interact with.
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Document.execCommand() - Web APIs
Web › API › Document › execCommand
when an html document has been switched to designmode, its document object exposes an execcommand method to run commands that manipulate the current editable region, such as form inputs or contenteditable elements.
... most commands affect the document's selection (bold, italics, etc.), while others insert new elements (adding a link), or affect an entire line (indenting).
... when using contenteditable, execcommand() affects the currently active editable element.
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Node.textContent - Web APIs
Web › API › Node › textContent
note: textcontent and htmlelement.innertext are easily confused, but the two properties are different in important ways.
... note: to get all of the text and cdata data for the whole document, one could use document.documentelement.textcontent.
... differences from innertext don't get confused by the differences between node.textcontent and htmlelement.innertext.
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Pointer Lock API - Web APIs
Web › API › Pointer Lock API
it gives you access to raw mouse movement, locks the target of mouse events to a single element, eliminates limits on how far mouse movement can go in a single direction, and removes the cursor from view.
...mouse capture provides continued delivery of events to a target element while a mouse is being dragged, but it stops when the mouse button is released.
... requestpointerlock() the pointer lock api, similar to the fullscreen api, extends dom elements by adding a new method, requestpointerlock().
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WebGLRenderingContext - Web APIs
Web › API › WebGLRenderingContext
the webglrenderingcontext interface provides an interface to the opengl es 2.0 graphics rendering context for the drawing surface of an html <canvas> element.
... to get an access to a webgl context for 2d and/or 3d graphics rendering, call getcontext() on a <canvas> element, supplying "webgl" as the argument: var canvas = document.getelementbyid('mycanvas'); var gl = canvas.getcontext('webgl'); once you have the webgl rendering context for a canvas, you can render within it.
... the webgl context the following properties and methods provide general information and functionality to deal with the webgl context: webglrenderingcontext.canvas a read-only back-reference to the htmlcanvaselement.
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ARIA: form role - Accessibility
Web › Accessibility › ARIA › Roles › Form Role
the form landmark role can be used to identify a group of elements on a page that provide equivalent functionality to an html form.
... important: use an html <form> element to contain your form controls, rather than the aria form role, unless you have a very good reason.
... the html <form> element is sufficient to tell assistive technologies that there is a form.
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ARIA: table role - Accessibility
Web › Accessibility › ARIA › Roles › Table Role
the table value of the aria role attribute identifies the element containing the role as having a non-interactive table structure containing data arranged in rows and columns, similar to the native <table> html element.
... <div role="table" aria-label="semantic elements" aria-describedby="semantic_elements_table_desc" aria-rowcount="81"> <div id="semantic_elements_table_desc">semantic elements to use instead of aria's roles</div> <div role="rowgroup"> <div role="row"> <span role="columnheader" aria-sort="none">aria role</span> <span role="columnheader" aria-sort="none">semantic element</span> </div> </div> <div role="rowgroup"> <div role="row" aria-rowindex="11"> <span role="cell">header</span> <span role="cell">h1</span> </div> <div role="row" aria-rowindex="16"> <span role="cell">header</span> <span role="cell">h6</span> </div> <div role="row" aria-rowindex="18"> <span role="cell">rowgroup</span> <span role="cell">thead</span> ...
... </div> <div role="row" aria-rowindex="24"> <span role="cell">term</span> <span role="cell">dt</span> </div> </div> </div> description an element with role="table" is a static tabular structure with rows containing cells.
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ARIA: listbox role - Accessibility
Web › Accessibility › ARIA › Roles › listbox role
the listbox role is used for lists from which a user may select one or more items which are static and, unlike html <select> elements, may contain images.
... description the listbox role is used to identify an element that creates a list from which a user may select one or more static items, similar to the html <select> element.
... it is highly recommended to use the html select element, or a group of radio buttons if only one item can be selected, or a group of checkboxes if multiple items can be selected, because there is a lot of keyboard interactivity to manage focus for all the descendants, and native html elements provide this functionality for you for free.
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Border-image generator - CSS: Cascading Style Sheets
Web › CSS › CSS Background and Borders › Border-image generator
t: bold; text-align: right; float: left; } #output .css-property .value { width: 65%; padding: 0 2.5%; word-break: break-all; float: left; } javascript content 'use strict'; /** * ui-slidersmanager */ var inputslidermanager = (function inputslidermanager() { var subscribers = {}; var sliders = []; var inputcomponent = function inputcomponent(obj) { var input = document.createelement('input'); input.setattribute('type', 'text'); input.style.width = 50 + obj.precision * 10 + 'px'; input.addeventlistener('click', function(e) { this.select(); }); input.addeventlistener('change', function(e) { var value = parsefloat(e.target.value); if (isnan(value) === true) setvalue(obj.topic, obj.value); else setvalue(obj.topic, value); }); return input; ...
...}; var slidercomponent = function slidercomponent(obj, sign) { var slider = document.createelement('div'); var startx = null; var start_value = 0; slider.addeventlistener("click", function(e) { document.removeeventlistener("mousemove", slidermotion); setvalue(obj.topic, obj.value + obj.step * sign); }); slider.addeventlistener("mousedown", function(e) { startx = e.clientx; start_value = obj.value; document.body.style.cursor = "e-resize"; document.addeventlistener("mouseup", slideend); document.addeventlistener("mousemove", slidermotion); }); var slideend = function slideend(e) { document.removeeventlistener("mousemove", slidermotion); document.body.style.cursor = "auto"; slider.style.cursor = "pointer"; }; var slidermotion = function slider...
...this.min : value; var input = new inputcomponent(this); var slider_left = new slidercomponent(this, -1); var slider_right = new slidercomponent(this, 1); slider_left.classname = 'ui-input-slider-left'; slider_right.classname = 'ui-input-slider-right'; if (name) { var info = document.createelement('span'); info.classname = 'ui-input-slider-info'; info.textcontent = name; node.appendchild(info); } node.appendchild(slider_left); node.appendchild(input); node.appendchild(slider_right); this.input = input; sliders[topic] = this; setvalue(topic, value); }; inputslider.prototype.setinputvalue = function setinputvalue() { this.input.value = this.value.tofixed(this.pr...
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box-sizing - CSS: Cascading Style Sheets
Web › CSS › box-sizing
the box-sizing css property sets how the total width and height of an element is calculated.
... by default in the css box model, the width and height you assign to an element is applied only to the element's content box.
... if the element has any border or padding, this is then added to the width and height to arrive at the size of the box that's rendered on the screen.
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contain - CSS: Cascading Style Sheets
Web › CSS › contain
the contain css property allows an author to indicate that an element and its contents are, as much as possible, independent of the rest of the document tree.
... values none indicates the element renders as normal, with no containment applied.
... strict indicates that all containment rules except style are applied to the element.
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float - CSS: Cascading Style Sheets
Web › CSS › float
the float css property places an element on the left or right side of its container, allowing text and inline elements to wrap around it.
... the element is removed from the normal flow of the page, though still remaining a part of the flow (in contrast to absolute positioning).
... a floating element is one where the computed value of float is not none.
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Making content editable - Developer guides
Web › Guide › HTML › Editable content
in html, any element can be editable.
...these are object resizing on <img>, <table>, and absolutely-positioned elements; inline table editing to add or remove rows and columns; and the grabber that allows moving of absolutely-positioned elements.
... all you have to do is set the contenteditable attribute on nearly any html element to make it editable.
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HTML5 Parser - Developer guides
Web › Guide › HTML › HTML5 › HTML5 Parser
some contexts from which you should not call document.write() include: scripts created using document.createelement() event handlers settimeout() setinterval() <script async src="..."> <script defer src="..."> if you use the same mechanism for loading script libraries for all browsers including ie, then your code probably will not be affected by this change.
... lack of reparsing prior to html5, parsers reparsed the document if they hit the end of the file within certain elements or within comments.
... foreignobject and annotation-xml (and various less important elements) establish a nested html scope, so you can nest svg, mathml and html as you’d expect to be able to nest them.
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HTML attribute: rel - HTML: Hypertext Markup Language
Web › HTML › Attributes › rel
valid on <link>, <a>, <area>, and <form>, the supported values depend on the element on which the attribute is found.
... values for the rel attribute, and the elements for which each is relevant rel value description <link> <a> and <area> <form> alternate alternate representations of the current document.
... not allowed link not allowed the rel attribute is relevant to the <link>, <a>, <area>, and <form> elements, but some values only relevant to a subset of those elements.
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<colgroup> - HTML: Hypertext Markup Language
Web › HTML › Element › colgroup
the html <colgroup> element defines a group of columns within a table.
... permitted content if the span attribute is present: none, it is an empty element.
... if the attribute is not present: zero or more <col> element tag omission the start tag may be omitted, if it has a <col> element as its first child and if it is not preceded by a <colgroup> whose end tag has been omitted.
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<input type="submit"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › submit
<input> elements of type submit are rendered as buttons.
... <input type="submit" value="send request"> value a domstring used as the button's label events click supported common attributes type and value idl attributes value methods none value an <input type="submit"> element's value attribute contains a domstring which is displayed as the button's label.
...this label is likely to be something along the lines of "submit" or "submit query." here's an example of a submit button with a default label in your browser: <input type="submit"> additional attributes in addition to the attributes shared by all <input> elements, submit button inputs support the following attributes: attribute description formaction the url to which to submit the form's data; overrides the form's action attribute, if any formenctype a string specifying the encoding type to use for the form data formmethod the http method (get or post) to use when submitting the form.
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<input type="tel"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › tel
<input> elements of type tel are used to let the user enter and edit a telephone number.
... a domstring representing a telephone number, or empty events change and input supported common attributes autocomplete, list, maxlength, minlength, pattern, placeholder, readonly, and size idl attributes list, selectionstart, selectionend, selectiondirection, and value methods select(), setrangetext(), setselectionrange() value the <input> element's value attribute contains a domstring that either represents a telephone number or is an empty string ("").
... additional attributes in addition to the attributes that operate on all <input> elements regardless of their type, telephone number inputs support the following attributes: attribute description list the id of the <datalist> element that contains the optional pre-defined autocomplete options maxlength the maximum length, in utf-16 characters, to accept as a valid input minlength the minimum length that is considered valid for the field's contents pattern a regular expression the entered value must match to pass constraint validation placeholder an example value to display inside the field when it has no value readonly a boolean attribute which, if present, indicates that the field's contents should not be ...
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Array.prototype.sort() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › sort
the sort() method sorts the elements of an array in place and returns the sorted array.
... the default sort order is ascending, built upon converting the elements into strings, then comparing their sequences of utf-16 code units values.
...if omitted, the array elements are converted to strings, then sorted according to each character's unicode code point value.
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TypedArray.prototype.filter() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › filter
the filter() method creates a new typed array with all elements that pass the test implemented by the provided function.
... syntax typedarray.filter(callback[, thisarg]) parameters callback function to test each element of the typed array.
... invoked with arguments (element, index, typedarray).
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TypedArray.prototype.find() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › find
the find() method returns a value in the typed array, if an element satisfies the provided testing function.
... see also the findindex() method, which returns the index of a found element in the typed array instead of its value.
... syntax typedarray.find(callback[, thisarg]) parameters callback function to execute on each value in the typed array, taking three arguments: element the current element being processed in the typed array.
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TypedArray.prototype.findIndex() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › findIndex
the findindex() method returns an index in the typed array, if an element in the typed array satisfies the provided testing function.
... see also the find() method, which returns the value of a found element in the typed array instead of its index.
... syntax typedarray.findindex(callback[, thisarg]) parameters callback function to execute on each value in the typed array, taking three arguments: element the current element being processed in the typed array.
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Web media technologies
Web › Media
today, there are a large number of apis available, as well as html elements, dom interfaces, and other features that make it possible to not only perform these tasks, but use media in tandem with other technologies to do truly remarkable things.
... <audio> the <audio> element is used to play audio in a web context.
...accessible from javascript as htmlaudioelement objects.
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The building blocks of responsive design - Progressive web apps (PWAs)
Web › Progressive web apps › Responsive › responsive design building blocks
the markup is very simple: <x-deck selected-index="0"> <x-card> … </x-card> <x-card> … </x-card> <x-card> … </x-card> </x-deck> note: these weird x- elements may be unfamiliar; they are part of brick, mozilla's ui element library for mobile web apps.
... border-box sizing the padding does not affect the overall width and height of the containers because we have set the box-sizing of all elements to border-box: *, *:before, *:after { -webkit-box-sizing: border-box; -moz-box-sizing: border-box; box-sizing: border-box; } this basically means that width and height will now set the dimensions of an element all the way up to and including the border, not just the content.
... flexible replaced elements things are working fairly well now, but there are still some issues just waiting to present themselves.
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package.json - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Tools › package json
this value will be used as the add-on's em:creator element in the install.rdf file generated by cfx.
... these values will be used as the add-on's em:contributor elements in its install.rdf.
... this value will be used as the add-on's em:description element in its install.rdf.
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Making it into a static overlay - Archive of obsolete content
Archive › Mozilla › Creating a Mozilla extension › Making it into a static overlay
a xul overlay is a xul file containing elements to be inserted into another xul file when the other xul file is rendered into an application interface.
...after that is a xul overlay element.
... this element is the top-level element in a xul overlay file and serves to identify the file as an overlay.
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Drag and Drop - Archive of obsolete content
Archive › Mozilla › Drag and drop
the list below describes the event handlers that can be called, which may be placed on any element.
... ondraggesture called when the user starts dragging the element, which normally happens when the user holds down the mouse button and moves the mouse.
... ondragover this event handler is called for an element when something is being dragged over top of it.
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DOM Interfaces - Archive of obsolete content
Archive › Mozilla › XBL › XBL 1.0 Reference › DOM Interfaces
idl definition interface nsidomdocumentxbl { nodelist getanonymousnodes(in element elt); element getanonymouselementbyattribute(in element elt, in domstring attrname, in domstring attrvalue); element getbindingparent(in node node); void loadbindingdocument(in domstring documenturl); }; methods getanonymousnodes the getanonymousnodes method retrieves the anonymous children of the specified element.
... parameters elt - the element to retrieve anonymous children for.
... return value nodelist - the return value of getanonymousnodes is a nodelist that represents the children of an element after insertion points from its own binding have been applied.
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MenuModification - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › MenuModification
this method will create a new menuitem element and insert it into the popup.
... this method may only be used with the menu element.
... <script> function addtomenu() { var menu = document.getelementbyid("edit-menu"); menu.appenditem("insert", "insert"); } </script> <menu id="edit-menu"/> <button label="add" oncommand="addtomenu()"/> in this example, the addtomenu function is called when the button is pressed.
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Filtering - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Filtering
for instance, to apply a filter, you might add a new <triple> element.
... function applyfilter(country) { var cond = document.getelementbyid("cond"); var triple = document.getelementbyid("filtertriple"); if (country) { if (!triple) { triple = document.createelement("triple"); triple.id = "filtertriple"; triple.setattribute("subject", "?photo"); triple.setattribute("predicate", "http://www.xulplanet.com/rdf/country"); } triple.setattribute("object", country); cond.appendchild(triple); } else if (triple) { cond.removechild(triple); } document.getelementbyid("photoslist").builder.rebuild(); } the 'country' argument to the applyfilter function holds the value to filter by.
...a new <triple> element is created and the object attribute is set to the value to filter by.
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Simple Query Syntax - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Simple Query Syntax
at its simplest, the simple query syntax is equivalent to the following: <query> <content uri="?start"/> <member container="?start" child="?photo"/> </query> the template builder uses the simple query syntax whenever a template does not have a <query> element.
... if a <query> element is present, the full syntax is used instead.
...here is what it might look like: <template> <vbox class="box-padded" uri="rdf:*"> <image src="rdf:*"/> <label value="rdf:http://purl.org/dc/elements/1.1/title"/> </vbox> </template> there is no <query> or <action> element used.
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Groupboxes - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Groupboxes
« previousnext » this section describes a way to include elements into groups groupboxes the groupbox element is used to group related xul elements together, much like the html fieldset element is used to group html elements.
... the groupbox is a type of box, and the elements it contains are aligned according to the xul box rules.
... however, there are several differences between groupboxes and regular boxes: the groupbox can be labeled using the caption element.
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<statusbarpanel> - Archive of obsolete content
Archive › Mozilla › XUL › statusbarpanel
an individual element of a statusbar.
...this element is often used with a short label or icon to indicate status, for instance whether the user is online or whether there are new messages.
...bel properties image, label style classes statusbarpanel-iconic, statusbarpanel-iconic-text, statusbarpanel-menu-iconic examples <statusbar> <statusbarpanel label="left panel"/> <spacer flex="1"/> <progressmeter mode="determined" value="82"/> <statusbarpanel label="right panel"/> </statusbar> attributes crop type: one of the values below if the label of the element is too big to fit in its given space, the text will be cropped on the side specified by the crop attribute.
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XForms Custom Controls - Archive of obsolete content
Archive › Web › XForms › Custom Controls
the xforms specification provides for a nice way to do this using xforms binding attributes (like ref, or nodeset) on your custom control element.
... var control = this; var refreshstub = function() { control.refresh(); } this.ref1.refresh = refreshstub; this.ref2.refresh = refreshstub; </constructor> <property name="ref1" readonly="true" onget="return this.ownerdocument.getanonymouselementbyattribute(this, 'anonid', 'ref1');"/> <property name="ref2" readonly="true" onget="return this.ownerdocument.getanonymouselementbyattribute(this, 'anonid', 'ref2');"/> </implementation> new host language the mozilla xforms implementation currently only supports xforms hosted in xhtml or xul documents.
...interface nsixformsuiwidget : nsidomelement { /** * is called when control should be updated to reflect the value of the bound node.
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Attribute selectors - Learn web development
Learn › CSS › Building blocks › Selectors › Attribute selectors
previous overview: building blocks next as you know from your study of html, elements can have attributes that give further detail about the element being marked up.
... in css you can use attribute selectors to target elements with certain attributes.
... presence and value selectors these selectors enable the selection of an element based on the presence of an attribute alone (for example href), or on various different matches against the value of the attribute.
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Styling links - Learn web development
Learn › CSS › Styling text › Styling links
focus: a link when it has been focused (for example moved to by a keyboard user using the tab key or similar, or programmatically focused using htmlelement.focus()) — this is styled using the :focus pseudo class.
...doing this makes the border adopt the same color as the element's text, which is useful in cases like this where the text is a different color in each case.
...;padding: 10px;border: 1px solid #0095dd;"></div> <div class="controls"> <input id="reset" type="button" value="reset" style="margin: 10px 10px 0 0;"> <input id="solution" type="button" value="show solution" style="margin: 10px 0 0 10px;"> </div> </div> var htmlinput = document.queryselector(".html-input"); var cssinput = document.queryselector(".css-input"); var reset = document.getelementbyid("reset"); var htmlcode = htmlinput.value; var csscode = cssinput.value; var output = document.queryselector(".output"); var solution = document.getelementbyid("solution"); var styleelem = document.createelement('style'); var headelem = document.queryselector('head'); headelem.appendchild(styleelem); function drawoutput() { output.innerhtml = htmlinput.value; styleelem.textcontent = cssi...
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Making decisions in your code — conditionals - Learn web development
Learn › JavaScript › Building blocks › conditionals
best to stay in with a cup of hot chocolate, or go build a snowman.'; } else if (choice === 'overcast') { para.textcontent = 'it isn\'t raining, but the sky is grey and gloomy; it could turn any minute, so take a rain coat just in case.'; } else { para.textcontent = ''; } } here we've got an html <select> element allowing us to make different weather choices, and a simple paragraph.
... in the javascript, we are storing a reference to both the <select> and <p> elements, and adding an event listener to the <select> element so that when its value is changed, the setweather() function is run.
... when this function is run, we first set a variable called choice to the current value selected in the <select> element.
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TypeScript support in Svelte - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Svelte TypeScript
we also had a look at using the transition directive to implement animations on dom elements in svelte.
...replace the first line of the <script> section with the following: import type { todotype } from '../types/todo.type' export let todos: todotype[] we will also specify the headingel, which we used to bind to the heading tag, as an htmlelement.
... update the let headingel line with the following: let headingel: htmlelement finally, you'll notice the following error reported, related to where we set the tabindex attribute.
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Accessibility Inspector - Firefox Developer Tools
Tools › Accessibility inspector
here we are mainly talking about exposing information to people with visual disabilities — this is done via the accessibility apis available inside web browsers, which expose information on what roles the different elements on your page play (e.g., are they just text, or are they buttons, links, form elements, etc.?).
... semantic dom elements have roles assigned to them by default that hint at what their purpose is.
...this is a bit like the dom tree, except that it contains a more limited set of elements and slightly different information about them.
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The JavaScript input interpreter - Firefox Developer Tools
Tools › Web Console › The command line interpreter
you get autocomplete suggestions for array elements, as well: you can enable or disable autocompletion via the settings ("gear") menu in the web console toolbar.
...there are three ways to select an iframe using cd(): you can pass the iframe dom element: var frame = document.getelementbyid("frame1"); cd(frame); you can pass a css selector that matches the iframe: cd("#frame1"); you can pass the iframe's global window object: var frame = document.getelementbyid("frame1"); cd(frame.contentwindow); to switch the context back to the top-level window, call cd() with no arguments: cd(); for example, suppose we have a document that embeds an i...
... $(selector, element) looks up a css selector string selector , returning the first node descended from element that matches.
...And 9 more matches
ParentNode - Web APIs
Web › API › ParentNode
it's implemented by element, document, and documentfragment objects.
... see locating dom elements using selectors to learn how to use css selectors to find nodes or elements of interest.
... properties parentnode.childelementcount read only returns the number of children of this parentnode which are elements.
...And 9 more matches
Window - Web APIs
Web › API › Window
image used for creating an htmlimageelement.
... option used for creating an htmloptionelement.
...for overriding the prototype of built-in elements) are listed in a separate section below.
...And 9 more matches
Web APIs
Web › API
astchannel budgetservice budgetstate buffersource bytelengthqueuingstrategy bytestring c cdatasection css cssconditionrule csscounterstylerule cssgroupingrule cssimagevalue csskeyframerule csskeyframesrule csskeywordvalue cssmathproduct cssmathsum cssmathvalue cssmediarule cssnamespacerule cssnumericvalue cssomstring csspagerule csspositionvalue cssprimitivevalue csspseudoelement cssrule cssrulelist cssstyledeclaration cssstylerule cssstylesheet cssstylevalue csssupportsrule cssunitvalue cssunparsedvalue cssvalue cssvaluelist cssvariablereferencevalue cache cachestorage canvascapturemediastreamtrack canvasgradient canvasimagesource canvaspattern canvasrenderingcontext2d caretposition channelmergernode channelsplitternode characterdata childnode cli...
...ent clients clipboard clipboardevent clipboarditem closeevent comment compositionevent constantsourcenode constrainboolean constraindomstring constraindouble constrainulong contentindex contentindexevent convolvernode countqueuingstrategy crashreportbody credential credentialscontainer crypto cryptokey cryptokeypair customelementregistry customevent d domconfiguration domerror domexception domhighrestimestamp domimplementation domimplementationlist domlocator dommatrix dommatrixreadonly domobject domparser dompoint dompointinit dompointreadonly domquad domrect domrectreadonly domstring domstringlist domstringmap domtimestamp domtokenlist domuserdata datatransfer datatransferitem datatransferitemlist dedicatedworkerglobalscope delaynode deprecationreportbody devi...
...cumenttouch documenttype doublerange dragevent dynamicscompressornode e ext_blend_minmax ext_color_buffer_float ext_color_buffer_half_float ext_disjoint_timer_query ext_float_blend ext_frag_depth ext_srgb ext_shader_texture_lod ext_texture_compression_bptc ext_texture_compression_rgtc ext_texture_filter_anisotropic eckeygenparams eckeyimportparams ecdhkeyderiveparams ecdsaparams effecttiming element elementcssinlinestyle elementtraversal errorevent event eventlistener eventsource eventtarget extendableevent extendablemessageevent f featurepolicy federatedcredential fetchevent file fileentrysync fileerror fileexception filelist filereader filereadersync filerequest filesystem filesystemdirectoryentry filesystemdirectoryreader filesystementry filesystementrysync file...
...And 9 more matches
Using the aria-hidden attribute - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the aria-hidden attribute
description adding aria-hidden="true" to an element removes that element and all of its children from the accessibility tree.
... this can improve the experience for assistive technology users by hiding: purely decorative content, such as icons or images duplicated content, such as repeated text offscreen or collapsed content, such as menus according to the fourth rule of aria, aria-hidden="true" should not be used on a focusable element.
... additionally, since this attribute is inherited by an element's children, it should not be added onto the parent or ancestor of a focusable element.
...And 9 more matches
ARIA: feed role - Accessibility
Web › Accessibility › ARIA › Roles › Feed Role
a feed is a container element whose children are <article>s or have role article.
...an article should be scrolled into view when it, or a descendant element, receives focus.
... another feature of the feed pattern is skim reading: articles within a feed can contain both an accessible name with the aria-label and a description with an aria-describedby, suggesting to screen readers which elements to speak after the label when navigating by article.
...And 9 more matches
ARIA: rowgroup role - Accessibility
Web › Accessibility › ARIA › Roles › Rowgroup Role
an element with role="rowgroup" is a group of rows within a tabular structure.
..."none">population</span> </div> </div> <div role="rowgroup"> <div role="row"> <span role="cell">finland</span> <span role="cell">5.5 million</span> </div> <div role="row"> <span role="cell">france</span> <span role="cell">67 million</span> </div> </div> </div> description rowgroup establishes a relationship between owned row elements and is a structural equivalent to the thead, tfoot and tbody elements in html.
...their elements must be contained in, or owned by, elements with either the table or grid role.
...And 9 more matches
Web applications and ARIA FAQ - Accessibility
Web › Accessibility › ARIA › Web applications and ARIA FAQ
these are specified by adding attributes to the element.
... in this example, the role="progressbar" attribute informs the browser that this element is actually a javascript-powered progress bar widget.
... along with placing them directly in the markup, aria attributes can be added to the element and updated dynamically using javascript code like this: // find the progress bar <div> in the dom.
...And 9 more matches
Relationship of flexbox to other layout methods - CSS: Cascading Style Sheets
Web › CSS › CSS Flexible Box Layout › Relationship of Flexbox to Other Layout Methods
this would be done via html, by adding a dir and lang attribute to the html element to indicate the document language and default text direction.
... an element set to display: flex behaves in most ways like any other block level container that establishes a containing block.
... in this next live example the child elements have been floated, and then their container has had display: flex added.
...And 9 more matches
appearance (-moz-appearance, -webkit-appearance) - CSS: Cascading Style Sheets
Web › CSS › appearance
the appearance css property is used to display an element using platform-native styling, based on the operating system's theme.
...in older browsers, even the keyword none does not have the same effect on all form elements across different browsers, and some do not support it at all.
... auto div{ color: black; -moz-appearance: auto; -webkit-appearance: auto; appearance:auto; } <div>lorem</div> none the user agent selects the appropriate special styling based on the element.
...And 9 more matches
<display-internal> - CSS: Cascading Style Sheets
Web › CSS › display-internal
syntax valid <display-internal> values: table-row-group these elements behave like <tbody> html elements.
... table-header-group these elements behave like <thead> html elements.
... table-footer-group these elements behave like <tfoot> html elements.
...And 9 more matches
left - CSS: Cascading Style Sheets
Web › CSS › left
the left css property participates in specifying the horizontal position of a positioned element.
... it has no effect on non-positioned elements.
... syntax /* <length> values */ left: 3px; left: 2.4em; /* <percentage>s of the width of the containing block */ left: 10%; /* keyword value */ left: auto; /* global values */ left: inherit; left: initial; left: unset; values <length> a negative, null, or positive <length> that represents: for absolutely positioned elements, the distance to the left edge of the containing block.
...And 9 more matches
visibility - CSS: Cascading Style Sheets
Web › CSS › visibility
the visibility css property shows or hides an element without changing the layout of a document.
... to both hide an element and remove it from the document layout, set the display property to none instead of using visibility.
... values visible the element box is visible.
...And 9 more matches
will-change - CSS: Cascading Style Sheets
Web › CSS › will-change
the will-change css property hints to browsers how an element is expected to change.
... browsers may set up optimizations before an element is actually changed.
...l-change: contents; will-change: transform; /* example of <custom-ident> */ will-change: opacity; /* example of <custom-ident> */ will-change: left, top; /* example of two <animateable-feature> */ /* global values */ will-change: inherit; will-change: initial; will-change: unset; proper usage of this property can be a bit tricky: don't apply will-change to too many elements.
...And 9 more matches
disabled - HTML: Hypertext Markup Language
Web › HTML › Attributes › disabled
the boolean disabled attribute, when present, makes the element not mutable, focusable, or even submitted with the form.
...if the disabled attribute is specified on a form control, the element and its form control descendants do not participate in constraint validation.
...if this attribute is not specified, the control inherits its setting from the containing element, for example fieldset; if there is no containing element with the disabled attribute set, and the control itself does not have the attribute, then the control is enabled.
...And 9 more matches
<input type="button"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › button
<input> elements of type button are rendered as simple push buttons, which can be programmed to control custom functionality anywhere on a webpage as required when assigned an event handler function (typically for the click event).
... note: while <input> elements of type button are still perfectly valid html, the newer <button> element is now the favored way to create buttons.
... value a domstring used as the button's label events click supported common attributes type, and value idl attributes value methods none value an <input type="button"> elements' value attribute contains a domstring that is used as the button's label.
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<input type="range"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › range
<input> elements of type range let the user specify a numeric value which must be no less than a given value, and no more than another given value.
... additional attributes in addition to the attributes shared by all <input> elements, range inputs offer the following attributes: attribute description list the id of the <datalist> element that contains optional pre-defined options max the maximum permitted value min the minimum permitted value step the stepping interval, used both for user interface and validation purposes list the values of the list att...
...ribute is the id of a <datalist> element located in the same document.
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<input type="week"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › week
<input> elements of type week create input fields allowing easy entry of a year plus the iso 8601 week number during that year (i.e., week 1 to 52 or 53).
... you can also get and set the value in javascript using the input element's value property, for example: var weekcontrol = document.queryselector('input[type="week"]'); weekcontrol.value = '2017-w45'; additional attributes in addition to the attributes common to <input> elements, week inputs offer the following attributes: attribute description max the latest year and week to accept as valid input min the earliest year and we...
...if the value entered into the element exceeds this, the element fails constraint validation.
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<listing> - HTML: Hypertext Markup Language
Web › HTML › Element › listing
summary the html listing element (<listing>) renders text between the start and end tags without interpreting the html in between and using a monospaced font.
... note: do not use this element.
...even more it is obsoleted in html5 and may be rendered by conforming user-agents as the <pre> element, which will interpret the internal html!
...And 9 more matches
<object> - HTML: Hypertext Markup Language
Web › HTML › Element › object
the html <object> element represents an external resource, which can be treated as an image, a nested browsing context, or a resource to be handled by a plugin.
... content categories flow content; phrasing content; embedded content, palpable content; if the element has a usemap attribute, interactive content; listed, submittable form-associated element.
... permitted content zero or more <param> elements, then transparent.
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tabindex - HTML: Hypertext Markup Language
Web › HTML › Global attributes › tabindex
the tabindex global attribute indicates that its element can be focused, and where it participates in sequential keyboard navigation (usually with the tab key, hence the name).
... it accepts an integer as a value, with different results depending on the integer's value: a negative value (usually tabindex="-1") means that the element is not reachable via sequential keyboard navigation, but could be focused with javascript or visually by clicking with the mouse.
...the user won't be able to focus any element with a negative tabindex using the keyboard, but a script can do so by calling the focus() method.
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Grammar and types - JavaScript
Web › JavaScript › Guide › Grammar and Types
the source text of javascript script gets scanned from left to right, and is converted into a sequence of input elements which are tokens, control characters, line terminators, comments, or whitespace.
...for example, the following code executes the function myfunction because the myarray element is undefined: var myarray = []; if (!myarray[0]) myfunction(); the undefined value converts to nan when used in numeric context.
...objects and functions are the other fundamental elements in the language.
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Performance fundamentals - Web Performance
Web › Performance › Fundamentals
high-level declarative languages), or use low-level imperative interfaces offered by the <canvas> element (which includes webgl).
...text and images reflow automatically, ui elements automatically receive the system theme, and the system provides "built-in" support for some use cases developers may not think of initially, like different-resolution displays or right-to-left languages.
... the canvas element offers a pixel buffer directly for developers to draw on.
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context-menu - Archive of obsolete content
Archive › Add-ons › Add-on SDK › High-Level APIs › context-menu
the example above works because <img> elements can't contain other elements, but in the example below, node.nodename is not guaranteed to be "p" - for example, it won't be "p" if the user context-clicked a link inside a paragraph: var cm = require("sdk/context-menu"); cm.item({ label: "a paragraph", context: cm.selectorcontext("p"), contentscript: 'self.on("context", function (node) {' + ' console.log(node.nodename);...
... (node, data) {" + " console.log('clicked: ' + node.nodename);" + "});"; var cm = require("sdk/context-menu"); cm.item({ label: "body context", context: cm.selectorcontext("body"), contentscript: script }); this add-on creates a context-menu item that uses selectorcontext to display the item whenever the context menu is activated on any descendant of the <body> element.
... if you run this add-on you'll see that it always logs "body", even if you click on a paragraph element inside the page: info: contextmenu-example: clicked: body by contrast, this add-on uses the pagecontext: var script = "self.on('click', function (node, data) {" + " console.log('clicked: ' + node.nodename);" + "});"; var cm = require("sdk/context-menu"); cm.item({ label: "body context", context: cm.pagecontext(), contentscript: script }); it will log the name of the actual node clicked: info: contextmenu-example: clicked: p the "data" argument data is the data property of the menu item that was clicked.
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Dialogs and Prompts - Archive of obsolete content
Archive › Add-ons › Code snippets › Dialogs and Prompts
describing dialog windows dialogs in mozilla whenever you want to create a dialog in your application, use <dialog> (instead of usual <window>) as root element in the xul file.
... for each of these buttons you can set their label, accesskey and oncommand handler by adding buttonlabel<buttonname>, buttonaccesskey<buttonname> and ondialog<buttonname> attributes to the dialog element.
... for example, to add an apply button to your dialog, use the following code: <dialog xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul" id="..." buttons="accept,cancel,extra1" ondialogaccept="onaccept();" ondialogextra1="onapply();" buttonlabelextra1="apply" buttonaccesskeyextra1="a"> <!-- content --> </dialog> you can even get the element object for any of predefined buttons with gdialog.getbutton(dlgtype);, where gdialog is the <dialog> element and dlgtype is one of the six button types listed above.
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Chapter 2: Technologies used in developing extensions - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › Firefox addons developer guide › Technologies used in developing extensions
listing 1: xml syntax <elementname someattribute="somevalue"> content </elementname> as shown in listing 1, xml uses elements, which consist of an opening tag, a closing tag, and content.
... note: elements that take no content can be expressed in compact form as <elementname/>.
... an element can include other elements as well as text in its content, and all information is structured as a tree.
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Namespaces - Archive of obsolete content
Archive › Mozilla › XUL › Namespaces
xml namespaces provide a way to distinguish duplicate element and attribute names.
... duplicates element and attribute names can occur when an xml document contains elements and attributes from two or more different xml schemas (or dtds).
...even if they did accidentally choose it, they may not define the same elements as xul anyway (e.g., <textbox/>) in their schema/dtd.
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Positioning - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › Positioning
second, the position can be specified using several attributes placed on the menupopup, panel or tooltip element.
... these attributes are described below and function the same for all three elements.
... the position attribute specifies the alignment of the popup with respect to the element that the popup is attached to.
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Building Menus With Templates - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Building Menus With Templates
« previousnext » menus may be generated using a template in the same manner as other elements.
... however, unlike with other elements, the content of a menu is only generated once the menu has been opened.
...the uri attribute has not been placed on the menupopup element which is the direct child of the action element but has instead been placed on the menuitem element.
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XML Templates - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › XML Templates
just place an expr attribute on the query element containing an xpath expression returns the set of results to output.
... here is an example: <listbox datasources="people.xml" ref="*" querytype="xml"> <template> <query expr="person"/> <action> <listitem uri="?" label="?name"/> </action> </template> </listbox> the expr attribute is a very simple xpath expression which simply retrieves the person elements from within the datasource.
...the action element defines the content to generate for each result.
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Things I've tried to do with XUL - Archive of obsolete content
Archive › Mozilla › XUL › Things I've tried to do with XUL
so, as soon as you add a label or some other element inside, there will be a different amount of "empty space" to allocate in different boxes.
... obtaining the rect of an element you can't obtain the actual visible rect of an element.
... html elements have the non-standard clientwidth/clientheight properties (see http://www.mozilla.org/docs/dom/domr...entheight.html); no equivalent exists for xul.
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XUL Template Primer - Bindings - Archive of obsolete content
Archive › Mozilla › XUL › XUL Template Primer - Bindings
overview this document expands on the xul template primer by introducing the <bindings> element in the extended xul template syntax.
... the <bindings> element is used to create additional,optional variable bindings, in addition to those that are specified in a rule's <conditions>.
...dr" predicate="http://home.netscape.com/nc-rdf#street" object="?street"/> </bindings> <action> <hbox uri="?friend"> <label value="?name"/> <label value="?street"/> </hbox> </action> </rule> </template> </vbox> </window> the xul template primer covers the <conditions> and <action> elements, so we won't discuss those here.
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The Implementation of the Application Object Model - Archive of obsolete content
Archive › Mozilla › XUL › XUL and RDF › The Implementation of the Application Object Model
nsxmlelement is used to represent a single node in a content tree for an xml language.
...this nsxmlelement implements a whole slew of interfaces, since raptor has multiple apis for referring to these objects.
... examples of these interfaces include nsidomelement, nsidomnode, nsixmlcontent, and nsicontent.
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caption - Archive of obsolete content
Archive › Mozilla › XUL › caption
it may contain either a text label, using the label attribute, or child elements for a more complex caption.
...this should be one of the characters that appears in the label attribute for the element.
... crop type: one of the values below if the label of the element is too big to fit in its given space, the text will be cropped on the side specified by the crop attribute.
...And 8 more matches
keyset - Archive of obsolete content
Archive › Mozilla › XUL › keyset
« xul reference home [ examples | attributes | properties | methods | related ] a container element for key elements.
... attributes disabled examples <keyset> <key id="sample-key" modifiers="shift" key="r"/> </keyset> attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width disabled ty...
...pe: boolean indicates whether the element is disabled or not.
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notification - Archive of obsolete content
Archive › Mozilla › XUL › notification
attributes image, label, priority, persistence, type, value properties accessibletype, control, image, label, priority, persistence, type, value methods close examples <notification label="this is a warning"/> attributes image type: uri the uri of the image to appear on the element.
... label type: string the label that will appear on the element.
...for an editable menuitem element the value of this attribute is copied to the menulist.value property upon user selection of the menuitem.
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treecell - Archive of obsolete content
Archive › Mozilla › XUL › treecell
this element should be placed inside a treerow.
... label type: string the label that will appear on the element.
...for an editable menuitem element the value of this attribute is copied to the menulist.value property upon user selection of the menuitem.
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treeitem - Archive of obsolete content
Archive › Mozilla › XUL › treeitem
« xul reference home [ examples | attributes | properties | methods | related ] a treeitem should be placed inside a treechildren element and should contain treerow elements.
... in a template condition, you should use a treeitem instead of a content element when the dont-build-content flag is specified.
... attributes container, empty, label, open, uri examples (example needed) attributes container type: boolean set to true if the element is to act as a container which can have child elements.
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Gecko Compatibility Handbook - Archive of obsolete content
Archive › Mozilla Gecko Compatibility Handbook
instead, each browser supports its own proprietary api for manipulating the content, style and position of html elements in a web page.
... internet explorer incorrectly specifies height and width of inline elements such as span.
...do not specify heights or widths on inline elements such as spans.
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Accessing XML children - Archive of obsolete content
Archive › Web › E4X tutorial › Accessing XML children
and [] operators provide access to the child nodes of an e4x element.
... var element1 = <foo> <bar/> </foo>; var element2 = <baz/>; element1.bar.appendchild(element2); element1["bar"].appendchild(<quux/>); adds a child to the "bar" child node of element1.
... this gives an xml document of <foo> <bar> <baz/> <quux/> </bar> </foo> note, however, that assigning a non-xml value to a child element that doesn't exist will create that element.
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Introduction - Archive of obsolete content
Archive › Web › E4X tutorial › Introduction
« previousnext » basic syntax with e4x enabled, basic xml elements are valid syntax for variables.
... for instance var element = <foo/>; is perfectly valid in an e4x enabled browser.
... variable declarations are not limited to one element, and as with all javascript, can span multiple lines.
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Mozilla XForms Specials - Archive of obsolete content
Archive › Web › XForms › Mozilla XForms Specials
(limitation tracked in bug 313111)pseudo element support there is no support for the pseudo elements (::value, ::repeat-item, and ::repeat-index ).
... instead you will have to use the following normal classes instead: xf-value xf-repeat-item xf-repeat-index for example, to target the value element of an input control use: @namespace xf url("http://www.w3.org/2002/xforms"); xf|input .xf-value { ...
... } the pseudo elements are defined in the css3 basic user interface specification .
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Backgrounds and borders - Learn web development
Learn › CSS › Building blocks › Backgrounds and borders
background colors the background-color property defines the background color on any element in css.
...a background-color extends underneath the content and padding box of the element.
... in the example below, we have used various color values to add a background color to the box, a heading, and a <span> element.
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From object to iframe — other embedding technologies - Learn web development
Learn › HTML › Multimedia and embedding › Other embedding technologies
at this point we'd like to take somewhat of a sideways step, looking at some elements that allow you to embed a wide variety of content types into your webpages: the <iframe>, <embed> and <object> elements.
...embedding these technologies was achieved through elements like <object>, and the lesser-used <embed>, and they were very useful at the time.
... finally, the <iframe> element appeared (along with other ways of embedding content, such as <canvas>, <video>, etc.) this provides a way to embed an entire web document inside another one, as if it were an <img> or other such element, and is used regularly today.
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Graceful asynchronous programming with Promises - Learn web development
Learn › JavaScript › Asynchronous › Promises
it then calls getusermedia(), asking for a stream that has both video and audio tracks, then once that's been obtained, sets up a video element to show the stream coming from the camera as a "self view," then takes each of the stream's tracks and adds them to the webrtc rtcpeerconnection representing a connection to another user.
... in the first example, we'll use the fetch() method to fetch an image from the web, the blob() method to transform the fetch response's raw body contents into a blob object, and then display that blob inside an <img> element.
... add a <script> element at the bottom of the html <body>.
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Introduction to web APIs - Learn web development
Learn › JavaScript › Client-side web APIs › Introduction
apis for drawing and manipulating graphics are now widely supported in browsers — the most popular ones are canvas and webgl, which allow you to programmatically update the pixel data contained in an html <canvas> element to create 2d and 3d scenes.
... audio and video apis like htmlmediaelement, the web audio api, and webrtc allow you to do really interesting things with multimedia such as creating custom ui controls for playing audio and video, displaying text tracks like captions and subtitles along with your videos, grabbing video from your web camera to be manipulated via a canvas (see above) or displayed on someone else's computer in a web conference, or adding effects to audio tra...
... mediaelementaudiosourcenode, which represents an <audio> element containing sound you want to play and manipulate inside the audio context.
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Mozilla DOM Hacking Guide
Mozilla › Mozilla DOM Hacking
for example, when we ask for |document.getelementbyid("myid");|, xpconnect will find that |document| is a property of the window object, so it will look on the interface nsidomwindow, and it will find the getdocument() method.
...so xpconnect will then try to find a method named getelementbyid() on the nsidomdocument interface.
... const nsiid **minterfaces: pointer to the first element of an array of pointers to all the interfaces available through js for this class.
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Mozilla Web Services Security Model
Mozilla › Mozilla Web Services Security Model
the webscriptaccess element its root element must be a webscriptaccess element in the http://www.mozilla.org/2002/soap/security namespace.
... this element must have either one delegate element child or any number (0 or more) of allow element children.
... all of these children elements must be in the same namespace as the parent, and must be empty.
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Mozilla Quirks Mode Behavior
Mozilla › Mozilla quirks mode behavior
collapse the bottom or top margins of empty elements (bug 97361).
... indent nested dl elements (bug 8749).
... (this also applies to getelementsbyclassname.) stylesheets linked in the document with an advisory mime type of text/css will still be treated as css even if the server gives a content-type header other than text/css.
...And 8 more matches
Mozilla Style System Documentation
Mozilla › Mozilla style system documentation
the css specification describes formatting objects that correspond to elements in the content model and formatting objects that correspond to pseudo-elements.
... (mozilla has a bunch of its pseudo-elements that are not in the css specification.) we also create style contexts for some things that are not css formatting objects: text nodes and placeholder frames.
... these three types of style contexts correspond to the three ways of creating a style context: nsiprescontext::resolvestylecontextfor, nsiprescontext::resolvepseudostylecontextfor, and.nsiprescontext::resolvestylecontextfornonelement there is also a fourth method, nsiprescontext::probepseudostylecontextfor, which creates a style context only if there are style rules that match the pseudo-element.
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nsIIOService
Mozilla › Tech › XPCOM › Reference › Interface › nsIIOService
this is the document/element that will get access to the result of this request.
...if possible, pass in the element which is performing the load.
... but if the load is coming from a js api (such as xmlhttprequest) or if the load might be coalesced across multiple elements (such as for ) then pass in the document node instead.
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XUL Overlays
Mozilla › Tech › XUL › Overlays
though overlays often define ui elements that have been added as a result of an update or enhancement of some kind, they can be used in many different ways.
...when plug-ins, browser extensions, or other applications provide new ui elements to the browser, these elements should be defined in overlay files.
... the installation of a media plug-in, for example, may add new icons and menu items to the interface: in the navigatoroverlay.xul file or in a separate navigatorsspoverlay.xul file (where navigator.xul defines the basic ui for the navigator package), these new plug-in elements would be defined as a collection of elements or subtrees: <menuitem name="super stream player"/> <menupopup name="ss favorites"> <menuitem name="wave" src="mavericks.ssp"/> <menuitem name="soccer" src="brazil_soccer.ssp"/> </menupopup> <titledbutton id="ssp" crop="right" flex="1" value="&ssbutton.label;" onclick="firessp()"/> overlays and id attributes bases and overlays are merged when they share the same id attribute.
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Working with windows in chrome code
Mozilla › Working with windows in chrome code
note however, that the open() call returns before the window is fully loaded, so some calls, like win.document.getelementbyid() will fail.
...the elements above the chrome document opened in the tab are separate from your chrome document.
...accessing elements which are ancestors of your chrome document, or accessing elements which are descendants of your chrome document (but nevertheless in a different context).
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Introduction to DOM Inspector - Firefox Developer Tools
Tools › Add-ons › DOM Inspector › Introduction to DOM Inspector
(note that there are bugs which prevent the flasher from dom inspector apis from working correctly on certain platforms.) if you inspect the main browser window, for example, and select nodes in the dom nodes viewer (other than the elements which have no visible ui as is the case with the endless list of script elements that are loaded into browser.xul), you will see the various parts of the browser interface being highlighted with a blinking red border.
...the rule that applies the search icon to the element uses a class simple selector and uses a list-style-image property to point to a file in the current theme.
... the box model viewer gives various metrics about xul and html elements, including placement and size.
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Web Console Helpers - Firefox Developer Tools
Tools › Web Console › Helpers
$(selector, element) looks up a css selector string selector , returning the first node descended from element that matches.
... if unspecified, element defaults to document.
... $$(selector, element) looks up a css selector string selector, returning an array of dom nodes descended from element that match.
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Using the CSS Typed Object Model - Web APIs
Web › API › CSS Typed OM API › Guide
converting css object model value strings into meaningfully-typed javascript representations and back (via htmlelement.style) can incur a significant performance overhead.
... computedstylemap() with the css typed om api, we can access all the css properties and values — including custom properties — that are impacting an element.
... // get the element const myelement = document.queryselector('a'); // get the <dl> we'll be populating const styleslist = document.queryselector('#regurgitation'); // retrieve all computed styles with computedstylemap() const defaultcomputedstyles = myelement.computedstylemap(); // iterate thru the map of all the properties and values, adding a <dt> and <dd> for each for (const [prop, val] of defaultcomputedstyle...
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Drawing shapes with canvas - Web APIs
Web › API › Canvas API › Tutorial › Drawing shapes
our html skeleton from the previous page had a canvas element 150 pixels wide and 150 pixels high.
...all elements are placed relative to this origin.
... rectangular shape example <html> <body onload="draw();"> <canvas id="canvas" width="150" height="150"></canvas> </body> </html> function draw() { var canvas = document.getelementbyid('canvas'); if (canvas.getcontext) { var ctx = canvas.getcontext('2d'); ctx.fillrect(25, 25, 100, 100); ctx.clearrect(45, 45, 60, 60); ctx.strokerect(50, 50, 50, 50); } } this example's output is shown below.
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Multi-touch interaction - Web APIs
Web › API › Pointer events › Multi-touch interaction
this application uses three arrays to cache event state, one cache per target element.
... function set_handlers(name) { // install event handlers for the given element var el=document.getelementbyid(name); el.onpointerdown = pointerdown_handler; el.onpointermove = pointermove_handler; // use same handler for pointer{up,cancel,out,leave} events since // the semantics for these events - in this app - are the same.
... in this application, when a pointer is placed down on an element, the background color of the element changes, depending on the number of active touch points the element has.
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Pinch zoom gestures - Web APIs
Web › API › Pointer events › Pinch zoom gestures
the pinch in (zoom out) gesture, which moves the two pointers toward each other, changes the target element's background color to lightblue.
... the pinch out (zoom in) gesture, which moves the two pointers away from each other, changes the target element's background color to pink.
... function init() { // install event handlers for the pointer target var el=document.getelementbyid("target"); el.onpointerdown = pointerdown_handler; el.onpointermove = pointermove_handler; // use same handler for pointer{up,cancel,out,leave} events since // the semantics for these events - in this app - are the same.
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Resize Observer API - Web APIs
Web › API › Resize Observer API
the resize observer api provides a performant mechanism by which code can monitor an element for changes to its size, with notifications being delivered to the observer each time the size changes.
... concepts and usage there are a whole raft of use cases for responsive design techniques (and others besides) that respond to changes in an element's size, but previously their implementations have often been hacky and/or brittle.
... for example, media queries / window.matchmedia are great for updating layouts at specific points when the viewport changes sizes, but what if you want to change layout in response to a specific element's size changing, which isn't the outer container?
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ShadowRoot - Web APIs
Web › API › ShadowRoot
you can retrieve a reference to an element's shadow root using its element.shadowroot property, provided it was created using element.attachshadow() with the mode option set to open.
... properties shadowroot.delegatesfocus read only returns a boolean that indicates whether delegatesfocus was set when the shadow was attached (see element.attachshadow()).
... shadowroot.host read only returns a reference to the dom element the shadowroot is attached to.
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Using DTMF with WebRTC - Web APIs
Web › API › WebRTC API › Using DTMF
each time a tone is sent, the rtcpeerconnection receives a tonechange event with a tone property specifying which tone finished playing, which is an opportunity to update interface elements, for example.
... html the html for this example is very basic; there are only three elements of importance: an <audio> element to play the audio received by the rtcpeerconnection being "called." a <button> element to trigger creating and connecting the two rtcpeerconnection objects, then sending the dtmf tones.
... let dialstring = "12024561111"; let callerpc = null; let receiverpc = null; let dtmfsender = null; let hasaddtrack = false; let mediaconstraints = { audio: true, video: false }; let offeroptions = { offertoreceiveaudio: 1, offertoreceivevideo: 0 }; let dialbutton = null; let logelement = null; these are, in order: dialstring the dtmf string the caller will send when the "dial" button is clicked.
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ARIA: contentinfo role - Accessibility
Web › Accessibility › ARIA › Roles › Contentinfo role
using the <footer> element instead is recommended: <footer> <h2>footer</h2> <!-- footer content --> </footer> description the contentinfo role is a landmark used to identify a page footer.
... each page should only include one contentinfo landmark, created by either using the <footer> element or by declaring role="contentinfo".
... contentinfo landmarks present in content embedded via <iframe> elements do not count towards this limit.
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ARIA: figure role - Accessibility
Web › Accessibility › ARIA › Roles › Figure Role
this is wrapped by a <div> element that identifies the content as a figure using role="figure".
... instead of using aria to create a figure, consider using the native, semantic html <figure> element.
... along with the <figcaption> element.
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In Flow and Out of Flow - CSS: Cascading Style Sheets
Web › CSS › CSS Flow Layout › In Flow and Out of Flow
all elements that are in flow, will be laid out using this method.
... in the following example i have a heading, paragraph, a list and a final paragraph which contains a strong element.
... the heading and paragraphs are block level, the strong element inline.
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all - CSS: Cascading Style Sheets
Web › CSS › all
the all shorthand css property resets all of an element's properties except unicode-bidi, direction, and css custom properties.
... values initial specifies that all the element's properties should be changed to their initial values.
... inherit specifies that all the element's properties should be changed to their inherited values.
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border-radius - CSS: Cascading Style Sheets
Web › CSS › border-radius
the border-radius css property rounds the corners of an element's outer border edge.
... the radius applies to the whole background, even if the element has no border; the exact position of the clipping is defined by the background-clip property.
... the border-radius property does not apply to table elements when border-collapse is collapse.
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box-lines - CSS: Cascading Style Sheets
Web › CSS › box-lines
the default value is single, which means that all elements will be placed in a single row or column, and any elements that don't fit will simply be considered overflow.
...the box must attempt to fit its children on as few lines as possible by shrinking all elements down to their minimum widths or heights if necessary.
... if the children in a horizontal box still do not fit on a line after being reduced to their minimum widths, then children are moved one by one onto a new line, until the elements remaining on the previous line fit.
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<display-box> - CSS: Cascading Style Sheets
Web › CSS › display-box
these keywords define whether an element generates display boxes at all.
... syntax valid <display-box> values: contents these elements don't produce a specific box by themselves.
...please note that the css display level 3 spec defines how the contents value should affect "unusual elements" — elements that aren’t rendered purely by css box concepts such as replaced elements.
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margin - CSS: Cascading Style Sheets
Web › CSS › margin
the margin css property sets the margin area on all four sides of an element.
... the top and bottom margins have no effect on non-replaced inline elements, such as <span> or <code>.
... note: margins create extra space around an element.
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resize - CSS: Cascading Style Sheets
Web › CSS › resize
the resize css property sets whether an element is resizable, and if so, in which directions.
... values none the element offers no user-controllable method for resizing it.
... both the element displays a mechanism for allowing the user to resize it, which may be resized both horizontally and vertically.
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unicode-bidi - CSS: Cascading Style Sheets
Web › CSS › unicode-bidi
/* keyword values */ unicode-bidi: normal; unicode-bidi: embed; unicode-bidi: isolate; unicode-bidi: bidi-override; unicode-bidi: isolate-override; unicode-bidi: plaintext; /* global values */ unicode-bidi: inherit; unicode-bidi: initial; unicode-bidi: unset; syntax values normal the element does not offer an additional level of embedding with respect to the bidirectional algorithm.
... for inline elements, implicit reordering works across element boundaries.
... embed if the element is inline, this value opens an additional level of embedding with respect to the bidirectional algorithm.
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User input and controls - Developer guides
Web › Guide › User input methods
using features such as contenteditable elements you can implement fast rich-text editors and with drag&drop let users moving elements inside your app.
...touch events can help you implement interactive elements and common interaction gestures on touchscreen devices.
... if you want to use touch events, you need to add event listeners and specify handler functions, which will be called when the event gets fired: element.addeventlistener("touchstart", handlestart, false);
 element.addeventlistener("touchcancel", handlecancel, false);
 element.addeventlistener("touchend", handleend, false);
 element.addeventlistener("touchmove", handlemove, false); where element is the dom element you want to register the touch events on.
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<input type="color"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › color
<input> elements of type color provide a user interface element that lets a user specify a color, either by using a visual color picker interface or by entering the color into a text field in #rrggbb hexadecimal format.
... the element's presentation may vary substantially from one browser and/or platform to another—it might be a simple textual input that automatically validates to ensure that the color information is entered in the proper format, or a platform-standard color picker, or some kind of custom color picker window.
... value a 7-character domstring specifying a <color> in lower-case hexadecimal notation events change and input supported common attributes autocomplete and list idl attributes list and value methods select() value the value of an <input> element of type color is always a domstring which contains a 7-character string specifying an rgb color in hexadecimal format.
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Preloading content with rel="preload" - HTML: Hypertext Markup Language
Web › HTML › Preloading content
the preload value of the <link> element's rel attribute lets you declare fetch requests in the html's <head>, specifying resources that your page will need very soon, which you want to start loading early in the page lifecycle, before browsers' main rendering machinery kicks in.
...this example is trivial, as the browser probably discovers the <link rel="stylesheet"> and <script> elements in the same chunk of html as the preloads, but the benefits can be seen much more clearly the later resources are discovered and the larger they are.
... embed: a resource to be embedded inside an <embed> element.
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Index - HTTP
Web › HTTP › Headers › Index
29 csp: base-uri csp, directive, document directive, http, security the http content-security-policy base-uri directive restricts the urls which can be used in a document's <base> element.
...if this directive is absent, the user agent will use the value in the <base> element.
... 31 csp: child-src csp, directive, http, reference, security the deprecated http content-security-policy (csp) child-src directive defines the valid sources for web workers and nested browsing contexts loaded using elements such as <frame> and <iframe>.
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Keyed collections - JavaScript
Web › JavaScript › Guide › Keyed collections
« previousnext » this chapter introduces collections of data which are indexed by a key; map and set objects contain elements which are iterable in the order of insertion.
...a map object is a simple key/value map and can iterate its elements in insertion order.
... the iteration of maps is in insertion order of the elements.
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TypedArray.prototype.forEach() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › forEach
the foreach() method executes a provided function once per array element.
... syntax typedarray.foreach(callback[, thisarg]) parameters callback function that produces an element of the new typed array, taking three arguments: currentvalue the current element being processed in the typed array.
... index the index of the current element being processed in the array.
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MathML attribute reference - MathML
Web › MathML › Attribute
more details for each attribute are available on particular element pages.
... notes: the mathml <mstyle> and <math> elements accept all attributes of all mathml presentation elements.
... the xlink attributes on mathml elements: xlink:actuate, xlink:href, xlink:show and xlink:type are deprecated as well.
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<altGlyph> - SVG: Scalable Vector Graphics
Web › SVG › Element › altGlyph
the <altglyph> svg element allows sophisticated selection of the glyphs used to render its child character data.
... usage context categoriestext content element, text content child elementpermitted contentany elements or character data attributes x this attribute defines the corresponding absolute x-coordinates for rendering the element.
... value type: <list-of-coordinates> ; default value: absolute x-coordinate of ancestor <text> or <tspan>; animatable: yes y this attribute defines the corresponding absolute y-coordinates for rendering the element.
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Basic Transformations - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Basic Transformations
but first, let's formally introduce the <g> element.
... with this helper, you can assign properties to a complete set of elements.
...an example: <svg width="30" height="10"> <g fill="red"> <rect x="0" y="0" width="10" height="10" /> <rect x="20" y="0" width="10" height="10" /> </g> </svg> all following transformations are summed up in an element's transform attribute.
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Clipping and masking - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Clipping and masking
clipping refers to removing parts of elements defined by other parts.
... creating clips we create the above mentioned semicircle based on a circle element: <svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <defs> <clippath id="cut-off-bottom"> <rect x="0" y="0" width="200" height="100" /> </clippath> </defs> <circle cx="100" cy="100" r="100" clip-path="url(#cut-off-bottom)" /> </svg> centered at (100,100) a circle with radius 100 is painted.
... the attribute clip-path references a <clippath> element with a single rect element.
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Appendix E: DOM Building and Insertion (HTML & XUL) - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › DOM Building and HTML Insertion
master/gatekeeper/there.is.only.xul" }; jsontodom.defaultnamespace = jsontodom.namespaces.html; function jsontodom(jsontemplate, doc, nodes) { function namespace(name) { var reelemnameparts = /^(?:(.*):)?(.*)$/.exec(name); return { namespace: jsontodom.namespaces[reelemnameparts[1]], shortname: reelemnameparts[2] }; } // note that 'elemnameorarray' is: either the full element name (eg.
... [html:]div) or an array of elements in json notation function tag(elemnameorarray, elemattr) { // array of elements?
... if (array.isarray(elemnameorarray)) { var frag = doc.createdocumentfragment(); array.foreach(arguments, function(thiselem) { frag.appendchild(tag.apply(null, thiselem)); }); return frag; } // single element?
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align - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › align
« xul reference home align type: one of the values below the align attribute specifies how child elements of the box are aligned, when the size of the box is larger than the total size of the children.
... start child elements are aligned starting from the left or top edge of the box.
... center extra space is split equally along each side of the child elements, resulting in the children being placed in the center of the box.
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Popup Guide - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide
popup types xul provides a number of different types of elements which may be used to create popup menus or other types of popup widgets, which vary based on the manner in which they are attached to an element and the manner in which they are opened.
... a menu is created using the menupopup element.
...a menu should only contain menu related elements.
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SQLite Templates - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › SQLite Templates
the query for an sqlite datasource is just an sql select statement, as text inside the query element.
...the uri attribute on the hbox element is required on one element within the action body.
...one possibility is to simply use methods to adjust the text within the query element and rebuild the template.
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Static Content - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Static Content
the static content is any content that is a sibling of the template element.
...ry-ont#country" oncommand="applyfilter(event.target.value);"> <menupopup> <menuitem label="all"/> </menupopup> <template> <query> <content uri="?start"/> <triple subject="?country" predicate="http://www.w3.org/1999/02/22-rdf-syntax-ns#type" object="?start"/> <triple subject="?country" predicate="http://purl.org/dc/elements/1.1/title" object="?countrytitle"/> </query> <action> <menupopup> <menuitem uri="?country" label="?countrytitle" value="?country"/> </menupopup> </action> </template> </menulist> the only difference between the previous example and this one is that the menulist element has some additional content added before the template.
...what's going on here is that the xul parser first creates the outer menulist element.
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Introduction to RDF - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Introduction to RDF
resource description framework we can use the tree elements to display a set of data, such as bookmarks or mail messages.
...rdf can also populate other xul elements as well such as listboxes and menus.
...it contains a fairly simple set of elements.
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Property Files - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Property Files
stringbundles you could write the code to read properties yourself, however xul provides the stringbundle element which does this for you.
... the element has a number of functions which can be used to get strings from the property file and get other locale information.
... this element reads in the contents of a property file and builds a list of properties for you.
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XBL Attribute Inheritance - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › XBL Attribute Inheritance
it would be useful to add attributes to the bound elements that modify the inner elements.
... for example: xul: <searchbox/> xbl: <binding id="searchbinding"> <content> <xul:textbox/> <xul:button label="search"/> </content> </binding> in the example, the label attribute has been placed directly on the button element.
...xbl provides an inherits attribute which can be used to inherit attributes from the bound element.
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XUL Changes for Firefox 1.5 - Archive of obsolete content
Archive › Mozilla › XUL › XUL Changes for Firefox 1.5
<scrollcorner> a <scrollcorner> element is added which is used to create the small box in the intersection of the horizontal and vertical scrollbars.
... <richlistbox> and <richlistitem> the <richlistbox> and <richlistitem> elements are used for creating lists containing arbitrary content.
... this element works similarly to the <listbox> which is designed primarily for lists of textual items.
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Accessibility/XUL Accessibility Reference - Archive of obsolete content
Archive › Mozilla › XUL › XUL accessibility reference
this table is designed to show how to expose text properly for various xul element types.
... element enabled usage comments description <description value="<!-- text -->" /> <description><!--label text--></description> use for non-label text.
... although tutorials claim label and description have the same underlying implementation, description elements appear to not associate correctly with controls whereas labels do.
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attribute.align - Archive of obsolete content
Archive › Mozilla › XUL › attribute.align
summary the align attribute specifies how child elements of the box are aligned, when the size of the box is larger than the total size of the children.
... parameters start child elements are aligned starting from the left or top edge of the box.
... center extra space is split equally along each side of the child elements, resulting the children being placed in the center of the box.
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image - Archive of obsolete content
Archive › Mozilla › XUL › image
« xul reference home [ examples | attributes | properties | methods | related ] summary an element that displays an image, much like the html img element.
...the new behavior aligns more with the html <img> element and shrinks both the width and height down proportionally.
... attributes onerror, onload, src, validate properties accessibletype, src style classes alert-icon, error-icon, message-icon, question-icon examples <image src='firefoxlogo.png' width='135' height='130'/> attributes onerror type: script code this event is sent to an image element when an error occurs loading the image.
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prefwindow - Archive of obsolete content
Archive › Mozilla › XUL › prefwindow
this element should be used in place of the window tag and should contain one or more prefpane elements.
... on platforms where the convention is to apply changes immediately, the preferences are adjusted as soon as the user interface element is changed.
... prefwindow.onload type: script code when a window finishes loading, it calls this event handler on the prefwindow element.
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toolbox - Archive of obsolete content
Archive › Mozilla › XUL › toolbox
the external toolbars associated with a toolbox are listed in the array of elements provided by the toolbox's externaltoolbars property.
... <toolbar> <toolbarbutton label="back"/> <toolbarbutton label="forward"/> <toolbarbutton label="home"/> </toolbar> <toolbar> <toolbarbutton label="stop"/> <toolbarbutton label="reload"/> </toolbar> </toolbox> <textbox multiline="true" value="we have two toolbars inside of one toolbox above." width="20"/> </window> attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, remove...
...element, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties accessible type: nsiaccessible returns the accessibility object for the element.
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display-outside - Archive of obsolete content
Archive › Web › CSS › display-outside
the display-outside css property specifies the outer display type of the box generated by an element, dictating how the element participates in its parent formatting context.
... values block-level the element generates a block-level box, and participates in a block formatting context.
... other formatting contexts, such as flex formatting contexts, may also work with block-level elements.
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create fancy boxes - Learn web development
Learn › CSS › Howto › create fancy boxes
we are about to see many examples, but we will always work on the most simple piece of html possible, a simple element: <div class="fancy">hi!
... i want to be fancy.</div> ok, that's a very small bit of html, what can we tweak on that element?
... its pseudo-element: ::before and ::after and some aside properties like: box-shadow, transform, outline, etc.
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Sending forms through JavaScript - Learn web development
Learn › Forms › Sending forms through JavaScript
using formdata bound to a <form> element.
... the formdata object can be used to build form data for transmission, or to get the data within a form element to manage how it's sent.
...something went wrong.' ); } ); // set up our request xhr.open( 'post', 'https://example.com/cors.php' ); // send our formdata object; http headers are set automatically xhr.send( fd ); } btn.addeventlistener( 'click', function() { senddata( {test:'ok'} ); } ) here's the live result: using formdata bound to a form element you can also bind a formdata object to an <form> element.
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Adding vector graphics to the Web - Learn web development
Learn › HTML › Multimedia and embedding › Adding vector graphics to the Web
it's basically markup, like html, except that you've got many different elements for defining the shapes you want to appear in your image, and the effects you want to apply to those shapes.
...at the simplest end of the spectrum, you've got elements for creating simple shapes, like <circle> and <rect>.
... svgs lend themselves well to styling/scripting, because each component of the image is an element that can be styled via css or scripted via javascript.
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Third-party APIs - Learn web development
Learn › JavaScript › Client-side web APIs › Third party APIs
const audioelement = document.queryselector('audio'); ...
... const audiosource = audioctx.createmediaelementsource(audioelement); // etc.
...this typically involves first linking to a javascript library available on the server via a <script> element, as seen in our mapquest example: <script src="https://api.mqcdn.com/sdk/mapquest-js/v1.3.2/mapquest.js"></script> <link type="text/css" rel="stylesheet" href="https://api.mqcdn.com/sdk/mapquest-js/v1.3.2/mapquest.css"/> you can then start using the objects available in that library.
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Creating our first Vue component - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Vue first component
vue templates are currently only allowed a single root element — one element needs to wrap everything inside the template section (this will change when vue 3 comes out).
... we'll use a <div> for that root element.
... to actually render the todoitem component in the app, you need to go up into your <template> element and call it as a <to-do-item></to-do-item> element.
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Experimental features in Firefox
Mozilla › Firefox › Experimental features
html element: <dialog> the html <dialog> element and its associated dom apis provide support for html-based modal dialog boxes.
... nightly 53 yes developer edition 53 no beta 53 no release 53 no preference name dom.dialog_element.enabled global attribute: inputmode our implementation of the inputmode global attribute has been updated as per the whatwg spec (bug 1509527), but we still need to make other changes too, like making it available on contenteditable content.
... nightly 75 yes developer edition 75 no beta 75 no release 75 no preference name dom.forms.inputmode <link rel="preload"> the <link> element's rel attribute is intended to help provide performance gains by letting you download resources earlier in the page lifecycle, ensuring that they're available earlier and are less likely to block page rendering.
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CustomizableUI.jsm
Mozilla › JavaScript code modules › CustomizableUI.jsm
'special' widgets: these are the representations of xul <toolbarseparator>, <toolbarspring> and <toolbarspacer> elements.
...void beginbatchupdate(); void endbatchupdate(aforcedirty); widgetgroupwrapper createwidget(awidgetspecification); void destroywidget(awidgetid); widgetgroupwrapper getwidget(awidgetid); array getunusedwidgets(awindow); array getwidgetidsinarea(aareaid); array getwidgetsinarea(aareaid); string getareatype(aareaid); domelement getcustomizetargetforarea(aareaid, awindow); void reset(); void undoreset(); void removeextratoolbar(); object getplacementofwidget(awidgetid); bool iswidgetremovable(awidgetnodeorwidgetid); bool canwidgetmovetoarea(awidgetid); void getlocalizedproperty(awidget, aprop, aformatargs, adef); void hidepanelfornode(anode); ...
...ners(apanel); void removepanelcloselisteners(apanel); void onwidgetdrag(awidgetid, aarea); void notifystartcustomizing(awindow); void notifyendcustomizing(awindow); void dispatchtoolboxevent(aevent, adetails, awindow); bool isareaoverflowable(aareaid); void settoolbarvisibility(atoolbarid, aisvisible); string getplaceforitem(aelement); bool isbuiltintoolbar(atoolbarid); methods addlistener() add a listener object that will get fired for various events regarding customization.
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JNI.jsm
Mozilla › JavaScript code modules › JNI.jsm
working with arrays creating/preallocating a typed array methods cdata .get(number aindex); cdata .getelements(number astart, number alength); void .set(number aindex, cdata avalue); void .setelements(number astart, [array, size_is(arr.length > number anynumber > 0)] in cdata avalsarray); .get() gets the value of the element in the array at given aindex.
... .getelements() returns a new cdata object of the section of the array specified by astart and ending at position astart + alength.
... void setelements(number astart, number alength); parameters astart the position to start setting elements of the array in.
...And 7 more matches
Mozilla MathML Status
Mozilla › MathML Project › Status
an overview of the mathml 3 elements/attributes - excluding deprecated ones - and the current status of the native support.
...if only the main features of an element are implemented then its section is marked as supported but details of unsupported attributes are specified below.
... the top-level math element see § 2.2.
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nsICollection
Mozilla › Tech › XPCOM › Reference › Interface › nsICollection
inherits from: nsiserializable last changed in gecko 1.7 method overview void appendelement(in nsisupports item); void clear(); pruint32 count(); nsienumerator enumerate(); nsisupports getelementat(in pruint32 index); void queryelementat(in pruint32 index, in nsiidref uuid, [iid_is(uuid),retval] out nsqiresult result); void removeelement(in nsisupports item); void setelementat(in pruint32 index, in nsisupports item); methods appendelement() appends a new item to the collection.
... void appendelement( in nsisupports item ) parameters item nsisupports item to be appended to the list.
...getelementat() returns the element at the specified index into the collection.
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nsISimpleEnumerator
Mozilla › Tech › XPCOM › Reference › Interface › nsISimpleEnumerator
xpcom/ds/nsisimpleenumerator.idlscriptable this interface represents an enumeration of xpcom objects and provides methods to access elements sequentially.
... inherits from: nsisupports last changed in gecko 0.9.6 method overview nsisupports getnext(); boolean hasmoreelements(); methods getnext() called to retrieve the next element in the enumerator.
... the "next" element is the first element upon the first call.
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Document.querySelector() - Web APIs
Web › API › Document › querySelector
the document method queryselector() returns the first element within the document that matches the specified selector, or group of selectors.
... note: the matching is done using depth-first pre-order traversal of the document's nodes starting with the first element in the document's markup and iterating through sequential nodes by order of the number of child nodes.
... syntax element = document.queryselector(selectors); parameters selectors a domstring containing one or more selectors to match.
...And 7 more matches
Document.querySelectorAll() - Web APIs
Web › API › Document › querySelectorAll
the document method queryselectorall() returns a static (not live) nodelist representing a list of the document's elements that match the specified group of selectors.
... syntax elementlist = parentnode.queryselectorall(selectors); parameters selectors a domstring containing one or more selectors to match against.
...see locating dom elements using selectors for more information about using selectors to identify elements.
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DocumentFragment - Web APIs
Web › API › DocumentFragment
parentnode.children read only returns a live htmlcollection containing all objects of type element that are children of the documentfragment object.
... parentnode.firstelementchild read only returns the element that is the first child of the documentfragment object, or null if there is none.
... parentnode.lastelementchild read only returns the element that is the last child of the documentfragment object, or null if there is none.
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ParentNode.querySelectorAll() - Web APIs
Web › API › ParentNode › querySelectorAll
the parentnode mixin defines the queryselectorall() method as returning a nodelist representing a list of elements matching the specified group of selectors which are descendants of the object on which the method was called.
... note: this method is implemented as element.queryselectorall(), document.queryselectorall(), and documentfragment.queryselectorall() syntax elementlist = parentnode.queryselectorall(selectors); parameters selectors a domstring containing one or more selectors to match against.
...see locating dom elements using selectors for more information about using selectors to identify elements.
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Using the aria-labelledby attribute - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the aria-labelledby attribute
description the aria-labelledby attribute establishes relationships between objects and their label(s), and its value should be one or more element ids, which refer to elements that have the text needed for labeling.
... list multiple element ids in a space delimited fashion.
...without an element id, the assistive technology cannot catalog the object.
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ARIA: application role - Accessibility
Web › Accessibility › ARIA › Roles › Application Role
the application role indicates to assistive technologies that an element and all of its children should be treated similar to a desktop application, and no traditional html interpretation techniques should be used.
... <div role="application">...</div> this defines this div element and all of its descendants to be treated like they are part of a desktop application.
... description the application role indicates to assistive technologies that this part of the web content contains elements that do not conform to any other known html element or wai-aria widget.
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ARIA: article role - Accessibility
Web › Accessibility › ARIA › Roles › Article Role
instead of a div with an article role, use the <article> element.
... always use native element if available.
... instead of using role="article", the <article> element can be used.
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ARIA - Accessibility
Web › Accessibility › ARIA
many of these widgets were later incorporated into html5, and developers should prefer using the correct semantic html element over using aria, if such an element exists.
... for instance, native elements have built-in keyboard accessibility, roles and states.
...these are specified by adding attributes to the element.
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:not() - CSS: Cascading Style Sheets
Web › CSS › :not
the :not() css pseudo-class represents elements that do not match a list of selectors.
... /* selects any element that is not a paragraph */ :not(p) { color: blue; } the :not() pseudo-class has a number of quirks, tricks, and unexpected results that you should be aware of before using it.
...the list must not contain another negation selector or a pseudo-element.
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Border-radius generator - CSS: Cascading Style Sheets
Web › CSS › CSS Background and Borders › Border-radius generator
#999; border-radius: 3px; -moz-user-select: text; -webkit-user-select: text; -ms-user-select: text; user-select: text; float: right; } javascript content 'use strict'; /** * ui-inputslidermanager */ var inputslidermanager = (function inputslidermanager() { var subscribers = {}; var sliders = []; var inputcomponent = function inputcomponent(obj) { var input = document.createelement('input'); input.setattribute('type', 'text'); input.addeventlistener('click', function(e) { this.select(); }); input.addeventlistener('change', function(e) { var value = parseint(e.target.value); if (isnan(value) === true) setvalue(obj.topic, obj.value); else setvalue(obj.topic, value); }); subscribe(obj.topic, function(value) { input.value = value + obj.uni...
...t; }); return input; } var slidercomponent = function slidercomponent(obj, sign) { var slider = document.createelement('div'); var startx = null; var start_value = 0; slider.addeventlistener("click", function(e) { setvalue(obj.topic, obj.value + obj.step * sign); }); slider.addeventlistener("mousedown", function(e) { startx = e.clientx; start_value = obj.value; document.body.style.cursor = "e-resize"; document.addeventlistener("mousemove", slidermotion); }); document.addeventlistener("mouseup", function(e) { document.removeeventlistener("mousemove", slidermotion); document.body.style.cursor = "auto"; slider.style.cursor = "pointer"; }); var slidermotion = function slidermotion(e) { slider.style.cursor = "e-resize"; var delta = (e.clien...
...sensivity : 5; var input = new inputcomponent(this); var slider_left = new slidercomponent(this, -1); var slider_right = new slidercomponent(this, 1); slider_left.classname = 'ui-input-slider-left'; slider_right.classname = 'ui-input-slider-right'; if (name) { var info = document.createelement('span'); info.classname = 'ui-input-slider-info'; info.textcontent = name; node.appendchild(info); } node.appendchild(slider_left); node.appendchild(input); node.appendchild(slider_right); node.classname = 'ui-input-slider ui-input-slider-container'; this.input = input; sliders[topic] = this; setvalue(topic, value); } var setvalue = function setvalue(topic, value, se...
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Using CSS transforms - CSS: Cascading Style Sheets
Web › CSS › CSS Transforms › Using CSS transforms
css transforms are implemented using a set of css properties that let you apply affine linear transformations to html elements.
... only elements positioned by the box model can be transformed.
... as a rule of thumb, an element is positioned by the box model if it has display: block.
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bottom - CSS: Cascading Style Sheets
Web › CSS › bottom
the bottom css property participates in setting the vertical position of a positioned element.
... it has no effect on non-positioned elements.
... the effect of bottom depends on how the element is positioned (i.e., the value of the position property): when position is set to absolute or fixed, the bottom property specifies the distance between the element's bottom edge and the bottom edge of its containing block.
...And 7 more matches
box-shadow - CSS: Cascading Style Sheets
Web › CSS › box-shadow
the box-shadow css property adds shadow effects around an element's frame.
...a box shadow is described by x and y offsets relative to the element, blur and spread radius, and color.
... the box-shadow property enables you to cast a drop shadow from the frame of almost any element.
...And 7 more matches
<color> - CSS: Cascading Style Sheets
Web › CSS › color value
to learn more about using color in html, see applying color to html elements using css.
... currentcolor keyword the currentcolor keyword represents the value of an element's color property.
... buttonhighlight the color of the border facing the light source for 3-d elements that appear 3-d due to that layer of surrounding border.
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Adapting to the new two-value syntax of display - CSS: Cascading Style Sheets
Web › CSS › display › two-value syntax of display
one of the first things we learn about css is that some elements are block-level and some are inline-level.
...changing an element's display value changes the formatting context of its direct children.
... what grid and flexbox demonstrate, however, is that an element has both an outer and an inner display type.
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line-height - CSS: Cascading Style Sheets
Web › CSS › line-height
on block-level elements, it specifies the minimum height of line boxes within the element.
... on non-replaced inline elements, it specifies the height that is used to calculate line box height.
... syntax /* keyword value */ line-height: normal; /* unitless values: use this number multiplied by the element's font size */ line-height: 3.5; /* <length> values */ line-height: 3em; /* <percentage> values */ line-height: 34%; /* global values */ line-height: inherit; line-height: initial; line-height: unset; the line-height property is specified as any one of the following: a <number> a <length> a <percentage> the keyword normal.
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object-position - CSS: Cascading Style Sheets
Web › CSS › object-position
the object-position css property specifies the alignment of the selected replaced element's contents within the element's box.
... areas of the box which aren't covered by the replaced element's object will show the element's background.
... you can adjust how the replaced element's object's intrinsic size (that is, its natural size) is adjusted to fit within the element's box using the object-fit property.
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opacity - CSS: Cascading Style Sheets
Web › CSS › opacity
the opacity css property sets the opacity of an element.
... opacity is the degree to which content behind an element is hidden, and is the opposite of transparency.
... value meaning 0 the element is fully transparent (that is, invisible).
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top - CSS: Cascading Style Sheets
Web › CSS › top
the top css property participates in specifying the vertical position of a positioned element.
... it has no effect on non-positioned elements.
... the effect of top depends on how the element is positioned (i.e., the value of the position property): when position is set to absolute or fixed, the top property specifies the distance between the element's top edge and the top edge of its containing block.
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user-select - CSS: Cascading Style Sheets
Web › CSS › user-select
t; -moz-user-select: all; /* webkit-specific values */ -webkit-user-select: none; -webkit-user-select: text; -webkit-user-select: all; /* doesn't work in safari; use only "none" or "text", or else it will allow typing in the <html> container */ /* microsoft-specific values */ -ms-user-select: none; -ms-user-select: text; -ms-user-select: element; note: user-select is not an inherited property, though the initial auto value makes it behave like it is inherited most of the time.
... syntax none the text of the element and its sub-elements is not selectable.
... note that the selection object can contain these elements.
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<acronym> - HTML: Hypertext Markup Language
Web › HTML › Element › acronym
summary the html acronym element (<acronym>) allows authors to clearly indicate a sequence of characters that compose an acronym or abbreviation for a word.
... usage note: this element has been removed in html5 and shouldn't be used anymore.
... instead web developers should use the <abbr> element.
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<basefont> - HTML: Hypertext Markup Language
Web › HTML › Element › basefont
the obsolete html base font element (<basefont>) sets a default font face, size, and color for the other elements which are descended from its parent element.
... with this set, the font's size can then be varied relative to the base size using the <font> element.
... you should not use this element; instead, you should use css properties such as font, font-family, font-size, and color to change the font configuration for an element and its contents.
...And 7 more matches
<col> - HTML: Hypertext Markup Language
Web › HTML › Element › col
the html <col> element defines a column within a table and is used for defining common semantics on all common cells.
... it is generally found within a <colgroup> element.
... permitted content none, it is an empty element.
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<main> - HTML: Hypertext Markup Language
Web › HTML › Element › main
the html <main> element represents the dominant content of the <body> of a document.
... a document mustn't have more than one <main> element that doesn't have the hidden attribute specified.
... permitted parents where flow content is expected, but only if it is a hierarchically correct main element.
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<s> - HTML: Hypertext Markup Language
Web › HTML › Element › s
the html <s> element renders text with a strikethrough, or a line through it.
... use the <s> element to represent things that are no longer relevant or no longer accurate.
... however, <s> is not appropriate when indicating document edits; for that, use the <del> and <ins> elements, as appropriate.
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hidden - HTML: Hypertext Markup Language
Web › HTML › Global attributes › hidden
the hidden global attribute is a boolean attribute indicating that the element is not yet, or is no longer, relevant.
... for example, it can be used to hide elements of the page that can't be used until the login process has been completed.
... browsers won't render elements with the hidden attribute set.
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Link types - HTML: Hypertext Markup Language
Web › HTML › Link types
in html, link types indicate the relationship between two documents, in which one links to the other using an <a>, <area>, <form>, or <link> element.
... list of the defined link types and their significance in html link type description allowed in these elements not allowed in these elements alternate if the element is <link> and the rel attribute also contains the stylesheet type, the link defines an alternative style sheet; in that case the title attribute must be present and not be the empty string.
... although recognized, the rev attribute on <a>, <area> or<link> elements with a link type of made is incorrect and should be replaced by the rel attribute with this link type.
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Content-Security-Policy - HTTP
Web › HTTP › Headers › Content-Security-Policy
child-src defines the valid sources for web workers and nested browsing contexts loaded using elements such as <frame> and <iframe>.
... frame-src specifies valid sources for nested browsing contexts loading using elements such as <frame> and <iframe>.
... media-src specifies valid sources for loading media using the <audio> , <video> and <track> elements.
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TypedArray.prototype.every() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › every
the every() method tests whether all elements in the typed array pass the test implemented by the provided function.
... syntax typedarray.every(callback[, thisarg]) parameters callback function to test for each element, taking three arguments: currentvalue the current element being processed in the typed array.
... index the index of the current element being processed in the typed array.
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Using images in HTML - Web media technologies
Web › Media › images
the html <img> element lets you embed images into an html document, while the <picture> element enables responsive images.
... references these articles cover some of the html elements and css properties that are used to control how images are displayed on the web.
... html <img> the html <img> element is used to embed an image in a webpage.
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end - SVG: Scalable Vector Graphics
Web › SVG › Attribute › end
five elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, <animatetransform>, and <set> usage notes default value none value <end-value-list> animatable no the <end-value-list> is a semicolon-separated list of values.
...the element's animation end time is defined relative to the begin or active end of another animation.
... a valid syncbase-value consists of an id reference to another animation element followed by a dot and either begin or end to identify whether to synchronize with the beginning or active end of the referenced animation element.
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Example - SVG: Scalable Vector Graphics
Web › SVG › Namespaces Crash Course › Example
</p> <div> (c) 2006 <a id='emailme' href='#'>nick johnson</a> <script type='text/javascript'> <![cdata[ // foil spam bots var email = '@riovia.net'; email ='nick' + email; document.getelementbyid('emailme').href = 'mailto:'+email; ]]> </script> this software is free for you to use in any way whatsoever, and comes with no warranty at all.
...velocity:</label> <input id='max_velocity' value='15'/> <br/> <label>attraction to cursor:</label> <input id='attract_cursor' value='6'/> <br/> <label>repulsion from peers:</label> <input id='repel_peer' value='5'/> <br/> </p> </form> <script type='text/javascript'> <![cdata[ // array of motes var motes; // get the display element.
... function display() { return document.getelementbyid('display'); } // determine dimensions of the display element.
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Basic shapes - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Basic Shapes
some of the parameters that determine their position and size are given, but an element reference would probably contain more accurate and complete descriptions along with other properties that won't be covered in here.
... basic shapes to insert a shape, you create an element in the document.
... different elements correspond to different shapes and take different parameters to describe the size and position of those shapes.
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<xsl:stylesheet> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › stylesheet
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:stylesheet> element (or the equivalent <xsl:transform> element) is the outermost element of a stylesheet.
... syntax <xsl:stylesheet version="number" xmlns:xsl="http://www.w3.org/1999/xsl/transform" id="name" extension-element-prefixes="list-of-names" exclude-result-prefixes="list-of-names"> entire stylesheet </xsl:stylesheet> required attributes version specifies the version of xslt required by this stylesheet.
... extension-element-prefixes specifies a space-separated list of any namespace prefixes for extension elements in this document.
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HTML in XUL for rich tooltips - Archive of obsolete content
Archive › Add-ons › Code snippets › HTML in XUL for rich tooltips
this example demonstrates the dynamic injection of html into a xul element.
...our customized tooltiphtml attribute for each element can be set at any time.
... var htmltip = { onload: function() { //at any point you can save an html string to a xul attribute for later injection into the tooltip document.getelementbyid("htmltip1").setattribute("tooltiphtml", "<font color='red'>red foo</font>") document.getelementbyid("htmltip2").setattribute("tooltiphtml", "<font color='green'>green foo</font>") }, onmousetooltip: function(event) { //get the html tooltip string assigned to the element that the mouse is over (which will soon launch the tooltip) var txt = event.target.getattribute("tooltiphtml"); // get the html div element that is inside the custom xul tooltip var div = document.getelementbyid("myhtmltipdiv"); //clear the html div element of any prior shown custom html while(div.firstchild) div.removechild(div.firstchild); //safely convert ...
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Handling Preferences - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › Handling Preferences
for preferences windows you should always use the prefwindow element instead of window in your xul file.
...if you have many preferences, you can organize them using the prefpane element.
... the prefwindow allows you to use the preferences and preference elements, which facilitate preference handling.
...And 6 more matches
Introducing the Audio API extension - Archive of obsolete content
Archive › Mozilla › Introducing the Audio API Extension
the audio data api extension extends the html5 specification of the <audio> and <video> media elements by exposing audio metadata and raw audio data.
... reading audio streams the loadedmetadata event when the metadata of the media element is available, it triggers a loadedmetadata event.
...the following example extracts the data from an audio element: <!doctype html> <html> <head> <title>javascript metadata example</title> </head> <body> <audio id="audio-element" src="song.ogg" controls="true" style="width: 512px;"> </audio> <script> function loadedmetadata() { channels = audio.mozchannels; rate = audio.mozsamplerate; framebufferlength = audio.mozframebufferlength; } var audio = document.getelementbyid('audio-elemen...
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A XUL Bestiary - Archive of obsolete content
Archive › Mozilla › XUL › A XUL Bestiary
when you create styles in <style> tags, as style attributes for individual elements, or in custom css files, you break the ability of gecko to skin the application to which your xul belongs.
...these widgets can be created and placed within a xul file as simple elements: <menu>, <toolbar>, and so on.
... the syntax for these elements is based for the most part on xml.
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disabled - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › disabled
« xul reference home disabled type: boolean indicates whether the element is disabled or not.
... if this attribute is set, the element is disabled.
... disabled elements are usually drawn with grayed-out text.
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Multiple Rules - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Multiple Rules
this involves using additional rule elements after the first.
...a multiple rule template looks like the following: <hbox id="photoslist" datasources="template-guide-photos3.rdf" ref="http://www.xulplanet.com/rdf/myphotos"> <template> <query> <content uri="?start"/> <member container="?start" child="?photo"/> <triple subject="?photo" predicate="http://purl.org/dc/elements/1.1/title" object="?title"/> </query> <rule> <where subject="?title" rel="equals" value="canal"/> <action> <button uri="?photo" image="?photo" label="view" orient="vertical"/> </action> </rule> <rule> <action> <image uri="?photo" src="?photo"/> </action> </rule> </template> </hbox> this template contains a query ...
...the first rule contains a new element, where which is used to define a condition.
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Content Panels - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Content Panels
second, the elements such the back and next buttons are the same throughout the interface.
...note that xul does have a wizard element which may be used to create wizard interfaces.
...another approach is to use the iframe element, which works much like the html element of the same name.
...And 6 more matches
XML - Archive of obsolete content
Archive › Mozilla › XUL › XUL and XML
html allows some elements, such as <br> and <hr>, to be neither closed nor matched with a closing element.
... in xul, elements must either be of the form <tag></tag> or <tag/> to be valid.
...it will consist of a lexicon of four terms: memo, to, from, body -- all of which fit together into a syntax represented in most xml circles as: <!element memo (from, to, body)> for developers accustomed to reading and using xml, this definition indicates that the root element "memo" is constituted by a "from" element, then a "to" element, then a "body" element.
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content - Archive of obsolete content
Archive › Mozilla › XUL › content
« xul reference home [ examples | attributes | properties | methods | related ] Éste elemento debería pertenecer a query ("consulta").
... la pregunta en una regla debería enlazar a sólo a un elemento del contenido.
... propiedades tag, uri ejemplos (no son necesarios) atributos inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, remove...
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grid - Archive of obsolete content
Archive › Mozilla › XUL › grid
« xul reference home [ examples | attributes | properties | methods | related ] a grid is a layout type that arranges elements in rows and columns.
... the grid is expected to contain both a columns element as a child which defines the structure of the columns and a rows element as child to define the rows.
... the size and attributes defined on columns and rows will affect the size and placement of elements in each cell.
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resizer - Archive of obsolete content
Archive › Mozilla › XUL › resizer
« xul reference home [ examples | attributes | properties | methods | related ] an element used for window resizing.
... note: starting in gecko 2.0, you can also specify a target element using the element attribute, to use the resizer to resize the specified element instead of the window.
... attributes dir, element, type examples resizing a window <window xmlns="http://www.mozilla.org/keymaster/gat...re.is.only.xul" hidechrome="true" windowtype="main" orient="vertical" sizemode="normal" width="400" height="300" persist="screenx screeny width height"> <hbox flex="1"> <vbox width="2" style="background-color: grey;"> <resizer dir="topleft" height="2" style="cursor: nw-resize;"/> <resizer dir="left" flex="1" style="cursor: w-resize;"/> <resizer dir="bottomleft" height="2" style="cursor: sw-resize;"/> </vbox> <vbox flex="1"> <resizer dir="top" height="2" style="background-color: grey; cursor: n-resize;"/> <browser flex="1" id="browser" type="content-primary"/> <resizer dir="bottom" height="2" style="background-color: grey; cursor: s-resize;"/> </...
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wizard - Archive of obsolete content
Archive › Mozilla › XUL › wizard
« xul reference home [ examples | attributes | properties | methods | related ] this element is used to construct a step-by-step wizard found in some applications to guide users through a task.
...this element provides the header and buttons along the bottom, and also handles navigation between the pages.
...in newer versions of mozilla, a statusbar may be placed directly inside the wizard element which will be shared among all pages.
...And 6 more matches
Browser Feature Detection - Archive of obsolete content
Archive › Web › Browser feature detection
0% 100% 100% / 100% 96% / 96% dom css 2 100% 98% 67% 71% / 83% 38% / 42% test results cross reference dom core level 1 support for properties/methods in document name firefox 1.5 ie 6 & 7 opera 8.54 - 9.01 document.doctype true true true document.implementation true true true document.documentelement true true true document.createelement() true true true document.createdocumentfragment() true true true document.createtextnode() true true true document.createcomment() true true true document.createcdatasection() true false true document.createprocessinginstruction() true false t...
...rue document.createattribute() true true true document.createentityreference()obsolete since gecko 7 (method present but only returns null: bug 9850) false false document.getelementsbytagname() true true true dom core level 2 support for properties/methods in document name firefox 1.5 ie 6 & 7 opera 8.54 - 9.01 document.doctype true true true document.implementation true true true document.documentelement true true true document.createelement() true true true document.createdocumentfragment() true true true document.createtextnode() true true true document.createcomment() true true true ...
... document.createcdatasection() true false true document.createprocessinginstruction() true false true document.createattribute() true true true document.createentityreference()obsolete since gecko 7 true false false document.getelementsbytagname() true true true document.importnode() true false true document.createelementns() true false true document.createattributens() true false true document.getelementsbytagnamens() true false true document.getelementbyid() true true true dom level 1 html support for properties/methods in document name firefox 1.5 ie 6 & 7 opera 8.54 - 9.01 document.doc...
...And 6 more matches
Styling the Amazing Netscape Fish Cam Page - Archive of obsolete content
Archive › Web › Styling the Amazing Netscape Fish Cam Page
at the end of it, there were a series of div elements that contained a picture of the fish, the name of the fish, and one or more paragraphs of text about the fish.
...this was most easily accomplished by floating the div elements themselves.
... since i wanted them to be side by side, it was important to be sure the total width of the element boxes (including margins) was less than 50%, so the first step was this: div.card {float: left; width: 45%; margin: 1em 2% 0 2%;} by making the content of each card 45% the width of the containing element, and adding 2% margin to both the left and right sides, each card's element box is 49% as wide as the parent.
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Writing JavaScript for XHTML - Archive of obsolete content
Archive › Web › Writing JavaScript for HTML
problem: names in xhtml and html are represented in different cases scripts that used getelementsbytagname() with an upper case html name no longer work, and attributes like nodename or tagname return upper case in html and lower case in xhtml.
... solution: use or convert to lower case for methods like getelementsbytagname(), passing the name in lower case will work in both html and xhtml.
... solution: use dom methods many people avoided dom methods because of the typing to create one simple element, when document.write() worked.
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Organizing your CSS - Learn web development
Learn › CSS › Building blocks › Organizing
this means all of the styles which will generally apply unless you do something special with that element.
...if you have a few things you know you will want to apply to lots of different elements, they can come in this section.
... avoid overly-specific selectors if you create very specific selectors you will often find that you need to duplicate chunks of your css to apply the same rules to another element.
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Test your skills: Selectors - Learn web development
Learn › CSS › Building blocks › Selectors › Selectors Tasks
selectors two without changing the html, make the following changes to the look of the content in this example: give the element with an id of special a yellow background.
... give the element with a class of alert a 1px grey border.
... if the element with a class of alert also has a class of stop, make the background red.
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HTML forms in legacy browsers - Learn web development
Learn › Forms › HTML forms in legacy browsers
just check the support of the elements (or dom interface) you want to use.
... mdn has compatibility tables available for most elements, properties and apis that can be used in a web page.
...if a browser does not know the value of the type attribute of an <input> element, it will fall back as if the value were text.
...And 6 more matches
JavaScript basics - Learn web development
Learn › Getting started with the web › JavaScript basics
in your index.html file, enter this code on a new line, just before the closing </body> tag: <script src="scripts/main.js"></script> this is doing the same job as the <link> element for css.
...you should see something like this: note: the reason the instructions (above) place the <script> element near the bottom of the html file is that the browser reads code in the order it appears in the file.
...when you want to do something to an element, you need to select it first.
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Useful string methods - Learn web development
Learn › JavaScript › First steps › Useful string methods
love', 'a happy christmas to all the family', 'you\'re all i want for christmas', 'get well soon']; for (let i = 0; i < greetings.length; i++) { let input = greetings[i]; // your conditional test needs to go inside the parentheses // in the line below, replacing what's currently there if (greetings[i]) { let listitem = document.createelement('li'); listitem.textcontent = input; list.appendchild(listitem); } } </textarea> <div class="playable-buttons"> <input id="reset" type="button" value="reset"> <input id="solution" type="button" value="show solution"> </div> html { font-family: sans-serif; } h2 { font-size: 16px; } .a11y-label { margin: 0; text-align: right; font-size: 0.7rem; width: 98%; } body { ...
... margin: 10px; background: #f5f9fa; } const textarea = document.getelementbyid('code'); const reset = document.getelementbyid('reset'); const solution = document.getelementbyid('solution'); let code = textarea.value; let userentry = textarea.value; function updatecode() { eval(textarea.value); } reset.addeventlistener('click', function() { textarea.value = code; userentry = textarea.value; solutionentry = jssolution; solution.value = 'show solution'; updatecode(); }); solution.addeventlistener('click', function() { if(solution.value === 'show solution') { textarea.value = solutionentry; solution.value = 'hide solution'; } else { textarea.value = userentry; solution.value = 'show solution'; } updatecode(); }); const jssolution = 'const list = document.que...
...y love\',' + '\n \'a happy christmas to all the family\',' + '\n \'you\\\'re all i want for christmas\',' + '\n \'get well soon\'];' + '\n' + '\nfor (let i = 0; i < greetings.length; i++) {' + '\n let input = greetings[i];' + '\n if (greetings[i].indexof(\'christmas\') !== -1) {' + '\n let result = input;' + '\n let listitem = document.createelement(\'li\');' + '\n listitem.textcontent = result;' + '\n list.appendchild(listitem);' + '\n }' + '\n}'; let solutionentry = jssolution; textarea.addeventlistener('input', updatecode); window.addeventlistener('load', updatecode); // stop tab key tabbing out of textarea and // make it write a tab at the caret position instead textarea.onkeydown = function(e){ if (e.keycode === 9) { e.
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Introduction to client-side frameworks - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Introduction
the verbosity of dom changes building html elements and rendering them in the browser at the appropriate time takes a surprising amount of code.
...we want to represent each task as a list item – an html <li> element inside of an unordered list element (a <ul>).
...that could look something like this: function buildtodoitemel(id, name) { const item = document.createelement('li'); const span = document.createelement('span'); const textcontent = document.createtextnode(name); span.appendchild(textcontent) item.id = id; item.appendchild(span); item.appendchild(builddeletebuttonel(id)); return item; } here, we use the document.createelement() method to make our <li>, and several more lines of code to create the properties and children it needs.
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Getting started with Svelte - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Svelte getting started
highly interactive pages or complex visualizations: if you are building data-visualizations that need to display a large number of dom elements, the performance gains that come from a framework with no runtime overhead will ensure that user interactions are snappy and responsive.
... <script> // logic goes here </script> <style> /* styles go here */ </style> <!-- markup (zero or more html elements) goes here --> note: for more information on the component format, have a look at the svelte documentation.
... <main> <h1>hello {name}!</h1> <p>visit the <a href="https://svelte.dev/tutorial">svelte tutorial</a> to learn how to build svelte apps.</p> </main> svelte also supports tags like {#if...}, {#each...}, and {#await...} — these examples allow you to conditionally render a portion of the markup, iterate through a list of elements, and work with async values, respectively.
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Performance best practices for Firefox front-end engineers
Mozilla › Firefox › Performance best practices for Firefox fe engineers
always keep in mind the side effects your changes may have, from blocking other tasks, to interfering with other user interface elements.
... when css is applied to a document (html or xul, it doesn’t matter), the browser does calculations to figure out which css styles will apply to each element.
... javascript code might, for example, change dom node attributes (either directly or by adding or removing classes from elements), and can also add, remove, or delete dom nodes.
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Creating localizable web applications
Mozilla › Localization › Web Localizability › Creating localizable web applications
you can put the locale code as the top-most element of the url's path (e.g.
...use the dir attribute on the <html/> element and consider using a rtl class on <html/> or <body/> as well, in order to easily change css rules like in the example below.
...good: css: html[dir='rtl'] foo { /* rtl-specific rules for the foo element */ } body.rtl foo { /* rtl-specific rules for the foo element */ } html/php: <?php function isrtl($locale) { $rtl_locales = array('ar', 'fa', 'he'); return in_array($locale, $rtl_locales); } ?> <html lang="<?= $locale?>" dir="<?= isrtl($locale) ?
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Investigating leaks using DMD heap scan mode
Mozilla › Performance › DMD › Heap Scan Mode
the output will look something like this, after a message about loading progress: 0x7f0882fe3230 [fragmentorelement (xhtml) script https://www.example.com] --[[via hash] mlistenermanager]--> 0x7f0899b4e550 [eventlistenermanager] --[mlisteners event=onload listenertype=3 [i]]--> 0x7f0882ff8f80 [callbackobject] --[mincumbentglobal]--> 0x7f0897082c00 [nsglobalwindowinner # 2147483662 inner https://www.example.com] root 0x7f0882fe3230 is a ref counted object with 1 unknown edge(s).
... known edges: 0x7f08975a24c0 [fragmentorelement (xhtml) head https://www.example.com] --[mattrsandchildren[i]]--> 0x7f0882fe3230 0x7f08967e7b20 [js object (htmlscriptelement)] --[unwrapdomobject(obj)]--> 0x7f0882fe3230 the first two lines mean that the script element 0x7f0882fe3230 contains a strong reference to the eventlistenermanager 0x7f0899b4e550.
...in this case, a head element and a js object (the js reflector of the script element).
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L20n HTML Bindings
Mozilla › Projects › L20n › HTML Bindings
download l20n with html bindings we maintain a repository with l20n optimized for production use: one file (~110kb) one file, minified (~35kb) it's recommended to include the l20n.js file as the last script in the head element.
... <link rel="localization" href="../locales/manifest.json"> an example of the manifest file (all keys are required): { "locales": [ "en-us", "pl"], "default_locale": "en-us", "resources": [ "../locales/{{locale}}/strings.l20n", "/shared/{{locale}}/date.l20n"¨ ] } make html elements localizable use the data-l10n-id attribute on an html element to mark it as localizable.
... a safe subset of html elements (e.g.
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JS::HandleValueArray
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS::HandleValueArray
syntax js::handlevaluearray(const js::rootedvalue& value); js::handlevaluearray(const js::autovaluevector& values); js::handlevaluearray(const js::autovaluearray<n>& values); js::handlevaluearray(const js::callargs& args); js::handlevaluearray::frommarkedlocation(size_t len, const js::value *elements); js::handlevaluearray::subarray(const js::handlevaluearray& values, size_t startindex, size_t len); js::handlevaluearray::empty(); name type description value js::rootedvalue &amp; an element of newly created 1-length array.
... values js::autovaluevector &amp; elements of newly created array.
... values js::autovaluearray &amp; elements of newly created array.
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nsIParserUtils
Mozilla › Tech › XPCOM › Reference › Interface › nsIParserUtils
ce: var parserutils = components.classes["@mozilla.org/parserutils;1"] .getservice(components.interfaces.nsiparserutils); method overview astring converttoplaintext(in astring src, in unsigned long flags, in unsigned long wrapcol); nsidomdocumentfragment parsefragment(in astring fragment, in unsigned long flags, in boolean isxml, in nsiuri baseuri, in nsidomelement element); astring sanitize(in astring src, in unsigned long flags); constants constant value description sanitizerallowcomments (1 << 0) flag for sanitizer: allow comment nodes.
... sanitizerallowstyle (1 << 1) flag for sanitizer: allow <style> elements and style attributes (with contents sanitized in case of -moz-binding).
... sanitizerdropnoncsspresentation (1 << 3) flag for sanitizer: drops non-css presentational html elements and attributes, such as <font>, <center>, and the bgcolor attribute.
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XPCOM Interface Reference by grouping
Mozilla › Tech › XPCOM › Reference › Reference by grouping
(i'm fully aware that this will be a great point of discussion and probably will end in tears, but since i'm the first person to apparently take a swing at this, i get first dibs.) the primary sections consist of: browser this section contains elements associated with the view pane or the content of the "browser window" proper.
... security this section contains apis for secure channel communications system this section contains application level interfaces including calls to external support elements (such as device calls).
... this is the root element and may contain some functions defined in other groups.
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Address Book examples
Mozilla › Thunderbird › Address Book Examples
let abmanager = components.classes["@mozilla.org/abmanager;1"] .getservice(components.interfaces.nsiabmanager); let alladdressbooks = abmanager.directories; while (alladdressbooks.hasmoreelements()) { let addressbook = alladdressbooks.getnext() .queryinterface(components.interfaces.nsiabdirectory); if (addressbook instanceof components.interfaces.nsiabdirectory) { // or nsiabitem or nsiabcollection // alert ("directory name:" + addressbook.dirname); ...
... assuming you wish to search across multiple directories: let abmanager = components.classes["@mozilla.org/abmanager;1"] .getservice(components.interfaces.nsiabmanager); let alladdressbooks = abmanager.directories; while (alladdressbooks.hasmoreelements()) { let ab = alladdressbooks.getnext(); if (ab instanceof components.interfaces.nsiabdirectory && !ab.isremote) { let searchresult = abmanager.getdirectory(ab.uri + "?" + searchquery).childcards; // ...
... addressbook.modifycard(card); deleting contacts once you have obtained a card(s) from an nsiabdirectory (see above) you can delete one or more simply by calling the deletecards function: let cardstodelete = components.classes["@mozilla.org/array;1"] .createinstance(components.interfaces.nsimutablearray); cardstodelete.appendelement(card); // repeat append as necessary addressbook.deletecards(cardstodelete); how do i add and use my own properties?
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Index - Firefox Developer Tools
Tools › Index
61 examine event listeners guide, inspector, tools the inspector shows the word "event" next to elements in the html pane, that have event listeners bound to them: 62 examine and edit css guide, inspector, tools you can examine and edit css in the inspector's css pane.
... 64 examine and edit the box model guide, tools with the select element button pressed, if you hover over an element in the page, the box model for the element is shown overlaid on the page: 65 inspect and select colors guide, inspector, tools in the css pane's rules view, if a rule contains a color value, you'll see a sample of the color next to the value: 66 open the inspector guide, inspector, tools there are two main ways to open the inspector: 67 reposition elements in the page starting in firefox 48 you can move absolutely positioned elements by draggi...
... 68 select an element guide, inspector, tools the selected element is the element in the page that the inspector is currently focused on.
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Work with animations - Firefox Developer Tools
Tools › Page Inspector › How to › Work with animations
starting in firefox 48, it will show animations applied to the ::before and ::after pseudo-elements.
... right-click in the box and select "inspect element" make sure the selected element is the <div class="channel"> switch over to the "animations" tab play the animation let's take a closer look at the contents of the animation inspector here: it shows a synchronized timeline for every animation applied to the selected element or its children.
... the animation's fill the playback rate of the animation information about the animated element to the left of each bar is a selector for the element that the animation applies to.
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UI Tour - Firefox Developer Tools
Tools › Page Inspector › UI Tour
it covers the three top-level components of the inspector's ui: the "select element" button the html pane the css pane this guide is intentionally kept as short as possible.
... select element button the inspector gives you detailed information about the currently selected element.
... the select element button is one way you can select an element for inspection: note that it's actually part of the main toolbox toolbar, so it's immediately accessible from any tool, not just the inspector.
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DOMMatrixReadOnly - Web APIs
Web › API › DOMMatrixReadOnly
if no matrix is specified as the multiplier, the matrix is multiplied by a matrix in which every element is 0 except the bottom-right corner and the element immediately above and to its left: m33 and m34.
... dommatrixreadonly.tofloat32array() returns a new float32array containing all 16 elements (m11, m12, m13, m14, m21, m22, m23, m24, m31, m32, m33, m34, m41, m42, m43, m44) which comprise the matrix.
... the elements are stored into the array as single-precision floating-point numbers in column-major (colexographical access, or "colex") order.
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Media Source API - Web APIs
Web › API › Media Source Extensions API
using mse, media streams can be created via javascript, and played using <audio> and <video> elements.
...mse allows us to replace the usual single track src value fed to media elements with a reference to a mediasource object, which is a container for information like the ready state of the media for being played, and references to multiple sourcebuffer objects that represent the different chunks of media that make up the entire stream.
... interfaces mediasource represents a media source to be played via an htmlmediaelement object.
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TextRange - Web APIs
Web › API › TextRange
it is implemented in ie, then a textrange object can be created by element.createtextrange() or document.selection.createrange().
... textrange.movetoelementtext() causes the range to contain the text of the specified element.
... can only be used on element objects.
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Using the Web Animations API - Web APIs
Web › API › Web Animations API › Using the Web Animations API
we no longer need to rely on dom-heavy techniques such as writing css properties and scoping classes onto elements to control playback direction.
...if your keyframe list has only one entry, element.animate() may throw a notsupportederror exception in some browsers until they are updated.
... bring the pieces together now it’s time to bring them both together with the element.animate() method: document.getelementbyid("alice").animate( alicetumbling, alicetiming ) and boom: the animation starts playing (see the finished version on codepen).
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Using the Web Speech API - Web APIs
Web › API › Web Speech API › Using the Web Speech API
but it is not needed for this simple demo, so we are just specifying one (which is actually the default anyway.) recognition.grammars = speechrecognitionlist; recognition.continuous = false; recognition.lang = 'en-us'; recognition.interimresults = false; recognition.maxalternatives = 1; starting the speech recognition after grabbing references to the output <div> and the html element (so we can output diagnostic messages and update the app background color later on), we implement an onclick handler so that when the screen is tapped/clicked, the speech recognition service will start.
...the <select> element is initially empty, but is populated with <option>s via javascript (see later on.) <h1>speech synthesiser</h1> <p>enter some text in the input below and press return to hear it.
... setting variables first of all, we capture references to all the dom elements involved in the ui, but more interestingly, we capture a reference to window.speechsynthesis.
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Using the alert role - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the alert role
when this role is added to an element, the browser will send out an accessible alert event to assistive technology products which can then notify the user about it.
... possible effects on user agents and assistive technology when the alert role is added to an element, or such an element becomes visible, the user agent should do the following: expose the element as having an alert role in the operating system's accessibility api.
...the moment the element finishes loading the screen reader should be notified of the alert.
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Using the link role - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the link role
the link role is used to identify an element that creates a hyperlink to a resource that is in the application or external.
... when this role is added to an element, tab can be used to change focus to the link, and enter used to execute the link.
... note: where possible, it is recommended that you use a native <a> element rather than the link role, as native elements are more widely supported by older user agents and assistive technology.
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ARIA: dialog role - Accessibility
Web › Accessibility › ARIA › Roles › dialog role
<div role="dialog" aria-labelledby="dialog1title" aria-describedby="dialog1desc"> <h2 id="dialog1title">your personal details were successfully updated</h2> <p id="dialog1desc">you can change your details at any time in the user account section.</p> <button>close</button> </div> description marking up a dialog element with the dialog role helps assistive technology identify the dialog's content as being grouped and separated from the rest of the page content.
...in other words, the dialog's label acts like a grouping label for the controls inside it (similar to how a <legend> element provides a grouping label for the controls inside a <fieldset> element).
...the best way to achieve this is by using the aria-labelledby attribute to the role="dialog" element.
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::after (:after) - CSS: Cascading Style Sheets
Web › CSS › ::after
in css, ::after creates a pseudo-element that is the last child of the selected element.
... it is often used to add cosmetic content to an element with the content property.
... /* add an arrow after links */ a::after { content: "→"; } note: the pseudo-elements generated by ::before and ::after are contained by the element's formatting box, and thus don't apply to replaced elements such as <img>, or to <br> elements.
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::slotted() - CSS: Cascading Style Sheets
Web › CSS › ::slotted
the ::slotted() css pseudo-element represents any element that has been placed into a slot inside an html template (see using templates and slots for more information).
...note also that this selector won't select a text node placed into a slot; it only targets actual elements.
... /* selects any element placed inside a slot */ ::slotted(*) { font-weight: bold; } /* selects any <span> placed inside a slot */ ::slotted(span) { font-weight: bold; } syntax ::slotted( <compound-selector-list> )where <compound-selector-list> = <compound-selector>#where <compound-selector> = [ <type-selector>?
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:host-context() - CSS: Cascading Style Sheets
Web › CSS › :host-context()
the :host-context() css pseudo-class function selects the shadow host of the shadow dom containing the css it is used inside (so you can select a custom element from inside its shadow dom) — but only if the selector given as the function's parameter matches the shadow host's ancestor(s) in the place it sits inside the dom hierarchy.
... in other words, this allows a custom element, or anything within that custom element's shadow dom, to apply different styles based on its position within the outer dom or classes/attributes applied to ancestor elements.
... one typical use of this is with a descendant selector expression — for example h1 — to select only instances of the custom element that are inside an <h1>.
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:scope - CSS: Cascading Style Sheets
Web › CSS › :scope
the :scope css pseudo-class represents elements that are a reference point for selectors to match against.
... /* selects a scoped element */ :scope { background-color: lime; } currently, when used in a stylesheet, :scope is the same as :root, since there is not at this time a way to explicitly establish a scoped element.
... when used from a dom api such as queryselector(), queryselectorall(), matches(), or element.closest(), :scope matches the element on which the method was called.
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Attribute selectors - CSS: Cascading Style Sheets
Web › CSS › Attribute selectors
the css attribute selector matches elements based on the presence or value of a given attribute.
... /* <a> elements with a title attribute */ a[title] { color: purple; } /* <a> elements with an href matching "https://example.org" */ a[href="https://example.org"] { color: green; } /* <a> elements with an href containing "example" */ a[href*="example"] { font-size: 2em; } /* <a> elements with an href ending ".org" */ a[href$=".org"] { font-style: italic; } /* <a> elements whose class attribute contains the word "logo" */ a[class~="logo"] { padding: 2px; } syntax [attr] represents elements with an attribute name of attr.
... [attr=value] represents elements with an attribute name of attr whose value is exactly value.
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Spanning and Balancing Columns - CSS: Cascading Style Sheets
Web › CSS › CSS Columns › Spanning Columns
in this guide we look at how to make elements span across columns inside the multicol container and how to control how the columns are filled.
...this will cause the element to span all of the columns.
... any descendant element of the multicol container may become a spanner including both direct and indirect children.
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CSS Containment - CSS: Cascading Style Sheets
Web › CSS › CSS Containment
if we give each <article> the contain property with a value of content, when new elements are inserted the browser understands it does not need to relayout or repaint any area outside of the containing element's subtree, although if the <article> is styled such that its size depends on its contents (e.g.
...it tells the browser that the internal layout of the element is totally separate from the rest of the page, and that everything about the element is painted inside its bounds.
...the values for this property indicate the type of containment that you want to apply to that element.
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border-image - CSS: Cascading Style Sheets
Web › CSS › border-image
the border-image css property draws an image around a given element.
... it replaces the element's regular border.
... <'border-image-outset'> the distance of the border image from the element's outside edge.
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<display-inside> - CSS: Cascading Style Sheets
Web › CSS › display-inside
these keywords specify the element’s inner display type, which defines the type of formatting context that lays out its contents (assuming it is a non-replaced element).
... syntax valid <display-inside> values: flow the element lays out its contents using flow layout (block-and-inline layout).
... flow-root the element generates a block element box that establishes a new block formatting context, defining where the formatting root lies.
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page-break-after - CSS: Cascading Style Sheets
Web › CSS › page-break-after
the page-break-after css property adjusts page breaks after the current element.
... /* keyword values */ page-break-after: auto; page-break-after: always; page-break-after: avoid; page-break-after: left; page-break-after: right; page-break-after: recto; page-break-after: verso; /* global values */ page-break-after: inherit; page-break-after: initial; page-break-after: unset; this property applies to block elements that generate a box.
... always always force page breaks after the element.
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page-break-before - CSS: Cascading Style Sheets
Web › CSS › page-break-before
the page-break-before css property adjusts page breaks before the current element.
... this property applies to block elements that generate a box.
... always always force page breaks before the element.
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DOM onevent handlers - Developer guides
Web › Guide › Events › Event handlers
registering onevent handlers the onevent handlers are properties on certain dom elements to manage how that element reacts to events.
... elements can be interactive (links, buttons, images, forms, and so forth) or non-interactive (such as the base <body> element).
... when an event occurs that applies to an element, each of its event handlers is called to allow them to handle the event, one after another.
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Rich-Text Editing in Mozilla - Developer guides
Web › Guide › HTML › Editable content › Rich-Text Editing in Mozilla
starting in firefox 3, mozilla also supports internet explorer's contenteditable attribute which allows any element to become editable or non-editable (the latter for when preventing change to fixed elements in an editable environment).
... similarly, setting contenteditable to "true" allows you to make individual elements of a document editable.
...most commands affect the document's selection (bold, italics, etc), while others insert new elements (adding a link) or affect an entire line (indenting).
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Allowing cross-origin use of images and canvas - HTML: Hypertext Markup Language
Web › HTML › CORS enabled image
html provides a crossorigin attribute for images that, in combination with an appropriate cors header, allows images defined by the <img> element that are loaded from foreign origins to be used in a <canvas> as if they had been loaded from the current origin.
... if the source of the foreign content is an html <img> or svg <svg> element, attempting to retrieve the contents of the canvas isn't allowed.
... if the foreign content comes from an image obtained from either as htmlcanvaselement or imagebitmap, and the image source doesn't meet the same origin rules, attempts to read the canvas's contents are blocked.
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<header> - HTML: Hypertext Markup Language
Web › HTML › Element › header
the html <header> element represents introductory content, typically a group of introductory or navigational aids.
... it may contain some heading elements but also a logo, a search form, an author name, and other elements.
... permitted parents any element that accepts flow content.
...And 6 more matches
<menuitem> - HTML: Hypertext Markup Language
Web › HTML › Element › menuitem
the html <menuitem> element represents a command that a user is able to invoke through a popup menu.
... a command can either be defined explicitly, with a textual label and optional icon to describe its appearance, or alternatively as an indirect command whose behavior is defined by a separate element.
...(menu items for indirect commands gain checkboxes or radio buttons when defined against elements <input type="checkbox"> and <input type="radio">.) content categories none.
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Microformats - HTML: Hypertext Markup Language
Web › HTML › microformats
the properties are carried in class attributes that can be added to any html element, while the data values re-use html element content and semantic attributes.
..."p-name", "p-summary" generic plain text parsing, element text in general.
... on certain html elements, use special attributes first, e.g.
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Array.prototype.indexOf() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › indexOf
the indexof() method returns the first index at which a given element can be found in the array, or -1 if it is not present.
... syntax arr.indexof(searchelement[, fromindex]) parameters searchelement element to locate in the array.
... return value the first index of the element in the array; -1 if not found.
...And 6 more matches
Array.prototype.lastIndexOf() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › lastIndexOf
the lastindexof() method returns the last index at which a given element can be found in the array, or -1 if it is not present.
... syntax arr.lastindexof(searchelement[, fromindex]) parameters searchelement element to locate in the array.
... return value the last index of the element in the array; -1 if not found.
...And 6 more matches
Set - JavaScript
Web › JavaScript › Reference › Global Objects › Set
you can iterate through the elements of a set in insertion order.
... set.prototype.clear() removes all elements from the set object.
... set.prototype.delete(value) removes the element associated to the value and returns the value that set.prototype.has(value) would have previously returned.
...And 6 more matches
TypedArray.prototype.map() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › map
the map() method creates a new typed array with the results of calling a provided function on every element in this typed array.
... syntax typedarray.map(mapfn[, thisarg]) parameters mapfn a callback function that produces an element of the new typed array, taking three arguments: currentvalue the current element being processed in the typed array.
... index optional the index of the current element being processed in the typed array.
...And 6 more matches
TypedArray.prototype.some() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › some
the some() method tests whether some element in the typed array passes the test implemented by the provided function.
... syntax typedarray.some(callback[, thisarg]) parameters callback function to test for each element, taking three arguments: currentvalue the current element being processed in the typed array.
... index the index of the current element being processed in the typed array.
...And 6 more matches
WebAssembly.Table() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › WebAssembly › Table › Table
the webassembly.table() constructor creates a new table object of the given size and element type.
... syntax new webassembly.table(tabledescriptor); parameters tabledescriptor an object that can contain the following members: element a string representing the type of value to be stored in the table.
... initial the initial number of elements of the webassembly table.
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WebAssembly.Table - JavaScript
Web › JavaScript › Reference › Global Objects › WebAssembly › Table
the number of elements.
... instance methods table.prototype.get() accessor function — gets the element stored at a given index.
... table.prototype.grow() increases the size of the table instance by a specified number of elements.
...And 6 more matches
Animation performance and frame rate - Web Performance
Web › Performance › Animation performance and frame rate
with css animations you specify a number of keyframes, each of which uses css to define the appearance of the element at a particular stage of the animation.
... compared with animating elements using javascript, css animations can be easier to create.
... the rendering waterfall the process a browser uses to paint changes to a page when an element is animating css properties can be described as a waterfall consisting of the following steps: recalculate style: when a property for an element changes, the browser must recalculate computed styles.
...And 6 more matches
in - SVG: Scalable Vector Graphics
Web › SVG › Attribute › in
the value can be either one of the six keywords defined below, or a string which matches a previous result attribute value within the same <filter> element.
... if the value for result appears multiple times within a given <filter> element, then a reference to that result will use the closest preceding filter primitive with the given value for attribute result.
... fourteen elements are using this attribute: <feblend>, <fecolormatrix>, <fecomponenttransfer>, <fecomposite>, <feconvolvematrix>, <fediffuselighting>, <fedisplacementmap>, <fedropshadow>, <fegaussianblur>, <femergenode>, <femorphology>, <feoffset>, <fespecularlighting>, <fetile> usage notes value sourcegraphic | sourcealpha | backgroundimage | backgroundalpha | fillpaint | strokepaint | <filter-primitive-reference> default value sourcegraphic for first filter primitive, otherwise result of previous filter primitive animatable yes sourcegraphic this keyword represents the graphics elements that were the original input into the <filter> element.
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text-anchor - SVG: Scalable Vector Graphics
Web › SVG › Attribute › text-anchor
the text-anchor attribute is applied to each individual text chunk within a given <text> element.
... each text chunk has an initial current text position, which represents the point in the user coordinate system resulting from (depending on context) application of the x and y attributes on the <text> element, any x or y attribute values on a <tspan>, <tref> or <altglyph> element assigned explicitly to the first rendered character in a text chunk, or determination of the initial current text position for a <textpath> element.
... as a presentation attribute, it can be applied to any element but it has effect only on the following five elements: <altglyph>, <text>, <textpath>, <tref>, and <tspan> html, body, svg { height: 100%; } <svg viewbox="0 0 120 120" xmlns="http://www.w3.org/2000/svg"> <!-- materialisation of anchors --> <path d="m60,15 l60,110 m30,40 l90,40 m30,75 l90,75 m30,110 l90,110" stroke="grey" /> <!-- anchors in action --> <text text-anchor="start" x="60" y="40">a</text> <text text-anchor="middle" x="60" y="75">a</text> <text text-anchor="end" x="60" y="110">a</text> <!-- materialisation of anchors --> <circle cx="60" cy="40" r="3" fill="red" /> <circle cx="60" cy="75" r="3" fill="red" /> <circle cx=...
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<svg> - SVG: Scalable Vector Graphics
Web › SVG › Element › svg
the svg element is a container that defines a new coordinate system and viewport.
... it is used as the outermost element of svg documents, but it can also be used to embed an svg fragment inside an svg or html document.
... note: the xmlns attribute is only required on the outermost svg element of svg documents.
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SVG fonts - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › SVG fonts
the base for defining an svg font is the <font> element.
...glyph --></glyph> <glyph unicode="@"><!-- outline of @ glyph --></glyph> <!-- more glyphs --> </font> we start with the <font> element.
... the <font-face> element is the svg equivalent of the css @font-face declaration.
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page-mod - Archive of obsolete content
Archive › Add-ons › Add-on SDK › High-Level APIs › page-mod
the main add-on code sends the desired tag to the content script, and the content script replies by sending the html content of all the elements with that tag.
... /lib/main.js: var tag = "p"; var data = require("sdk/self").data; var pagemod = require("sdk/page-mod"); pagemod.pagemod({ include: "*.mozilla.org", contentscriptfile: data.url("element-getter.js"), onattach: function(worker) { worker.port.emit("getelements", tag); worker.port.on("gotelement", function(elementcontent) { console.log(elementcontent); }); } }); /data/element-getter.js: self.port.on("getelements", function(tag) { var elements = document.getelementsbytagname(tag); for (var i = 0; i < elements.length; i++) { self.port.emit("gotelement", elements[i].innerhtml); } }); when the user loads a document hosted at "mozilla.org": the content script "element-getter.js" is attached to the document and runs.
... it adds a listener to the getelements message.
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panel - Archive of obsolete content
Archive › Add-ons › Add-on SDK › High-Level APIs › panel
the panel just contains a <textarea> element: when the user presses the return key, the contents of the <textarea> is sent to the main add-on code.
...var textarea = document.getelementbyid("edit-box"); textarea.addeventlistener('keyup', function onkeyup(event) { if (event.keycode == 13) { // remove the newline.
...self.port.on("show", function onshow() { textarea.focus(); }); finally, the "text-entry.html" file defines the <textarea> element: <html> <head> <style type="text/css" media="all"> textarea { margin: 10px; } body { background-color: gray; } </style> </head> <body> <textarea rows="13" cols="33" id="edit-box"></textarea> </body> </html> finally, save these three icon files to the "data" directory: icon-16.png icon-32.png icon-64...
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remote/parent - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › remote parent
this includes the content of every tab in an application like firefox and also some other ui elements.
...=> { // ask for the process id process.port.emit("fetchid"); // first argument is always the process, then the message payload process.port.once("id", (process, id) => { console.log("child process is remote:" + process.isremote); console.log("child process id:" + id); }); }); content frame manipulation this demonstrates telling every current frame to link to a specific anchor element: // remote.js const { frames } = require("sdk/remote/child"); // listeners receive the frame the event was for as the first argument frames.port.on("changelocation", (frame, ref) => { frame.content.location += "#" + ref; }); // main.js const { frames, remoterequire } = require("sdk/remote/parent"); remoterequire("./remote.js", module); frames.port.emit("changelocation", "foo"); tab infor...
...rames.addeventlistener("pageshow", function() { // `this` is bound to the frame the event came from let frame = this; frame.port.emit("pageshow"); }, true); // main.js const { frames, remoterequire } = require("sdk/remote/parent"); remoterequire("./remote.js", module); // the first argument is the frame the message came from frames.port.on("pageshow", (frame) => { console.log(frame.frameelement.currenturi.host + ": pageshow"); }); globals functions remoterequire(id, module = null) loads a module in any existing and future child processes.
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Chapter 4: Using XPCOM—Implementing advanced processes - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › Firefox addons developer guide › Using XPCOM—Implementing advanced processes
passing the name of the window type as the parameter of the nsiwindowmediator.getmostrecentwindow() method returns the most recently active window from among the root element's windows with that type set for the windowtype attribute value.
... listing 5: closing all browser windows var browsers = windowmediator.getenumerator('navigator:browser'); var browser; while (browsers.hasmoreelements()) { browser = browsers.getnext().queryinterface(components.interfaces.nsidomwindowinternal); browser.browsertrytoclosewindow(); } this method returns an overview of the specified window type in the form of an iterator pattern object called nsisimpleenumerator.
... after getting an element with the nsisimpleenumerator.getnext() method, use the queryinterface method to get the interface, which allows you to handle each element as a window object.
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Appendix F: Monitoring DOM changes - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › Appendix F: Monitoring DOM changes
in particular, the ::before and ::after pseudo-elements, and pseudo-classes like :hover and :active can be used to achieve extremely complex dynamic behavior.
... late binding and event delegation often times, it suffices to bind event listeners to top-level elements and check for matching elements when the event fires.
... for instance, rather than watching for the creation of <a> elements and adding event listeners to them as they are created, an event listener can be added to the root <html> element, and when the event fires, the event.target and its parents can be searched for a matching element.
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Supporting search suggestions in search plugins - Archive of obsolete content
Archive › Add-ons › Supporting search suggestions in search plugins
implementing suggestion support in the search plugin to support search suggestions, a search plugin needs to define an extra <url> element with its type attribute set to "application/x-suggestions+json".
... (this means that a suggestion-supporting engine plugin will have two <url> elements, the other one being the main text/html search url.) for example, the yahoo search plugin has this <url> entry: <url type="application/x-suggestions+json" template="http://ff.search.yahoo.com/gossip?output=fxjson&command={searchterms}"/> if the user types "fir" into the search bar, then pauses, firefox inserts "fir" in place of {searchterms} and queries that url: <url type="application/x-suggestions+json" template="http://ff.search.yahoo.com/gossip?output=fxjson&command=fir"/> the results are used to construct the suggestion list box.
... when the browser wants to fetch possible matches for a search term, it then sends an http get request to the url specified by the <url> element.
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Example Sticky Notes - Archive of obsolete content
Archive › Mozilla › XBL › XBL 1.0 Reference › Example Sticky Notes
--> <resources> <!-- obtaining the stylesheet we'll use to (re)style the bound element.
... --> <stylesheet src="notes.css"/> </resources> <content> <!-- this svg graphics will be added automatically around each bound element.
... * "this" in this context refers to the bound element.
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Extensions - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › Extensions
instead of having separate context menus depending on what type of element was the target of the context menu, only one context menu is used and items that don't apply to that type of element are hidden from the menu as needed.
... <popup id="contentareacontextmenu"> <menuitem id="thumbnail-show" label="view thumbnail" oncommand="thumbnails.view();"/> </popup> note that the popup element is used rather than the menupopup element as this is the element that firefox uses.
... function init() { var contextmenu = document.getelementbyid("contentareacontextmenu"); if (contextmenu) contextmenu.addeventlistener("popupshowing", thumbnailsshowhideitems, false); } function thumbnailsshowhideitems(event) { var show = document.getelementbyid("thumbnail-show"); show.hidden = (document.popupnode.localname != "img"); } the init function should be called within the handler for the load event so that the popupshowing event h...
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MenuItems - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › MenuItems
features of the menuitem element the menuitem element has a number of features beyond just being a label for a menu command.
...a shortcut key can be created using the key element.
... in reality, the keyboard shortcut is handled by the key element, however, the menu item will display the shortcut next to its label.
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Building Trees - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Building Trees
« previousnext » the most common element to use with a template is the tree.
...<tree id="photoslist" flex="1" datasources="template-guide-photos5.rdf" ref="http://www.xulplanet.com/rdf/myphotos" flags="dont-build-content"> <treecols> <treecol id="name" label="name" flex="1"/> <treecol id="date" label="date" flex="1"/> </treecols> <template> <treechildren> <treeitem uri="rdf:*"> <treerow> <treecell label="rdf:http://purl.org/dc/elements/1.1/title"/> <treecell label="rdf:http://purl.org/dc/elements/1.1/date"/> </treerow> </treeitem> </treechildren> </template> </tree> note: the tree columns (treecols) are declared outside the template as static content, since they only need to be declared once.
...when using the tree builder, the uri attribute must be declared on the treeitem element.
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Multiple Queries - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Multiple Queries
to use multiple queries, place each query element along with its rules inside a queryset element.
... the queryset element is a bit of a misnomer, it actually only contains one query each.
...if there is only rule, the rule element may be omitted as is the case when only one query is used.
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Creating a Window - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Creating a Window
the simplest xul file has the following structure: <?xml version="1.0"?> <?xml-stylesheet href="chrome://global/skin/" type="text/css"?> <window id="findfile-window" title="find files" orient="horizontal" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <!-- other elements go here --> </window> this window will not do anything since it doesn't contain any ui elements.
...this file contains all the default declarations for all of the xul elements.
... because xml does not have any knowledge of how elements should be displayed, the file indicates how.
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More Tree Features - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › More Tree Features
hierarchical trees the tree element is also used to create hierarchical lists, like that found in a file manager or a browser's bookmarks list.
...to create a set of nested rows, all we need to do is add a second treechildren element inside the parent treeitem.
...don't put the inner treechildren element inside the treerow as this won't work.
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menubar - Archive of obsolete content
Archive › Mozilla › XUL › menubar
« xul reference home [ examples | attributes | properties | methods | related ] a container that usually contains menu elements.
... on the macintosh, the menubar is displayed along the top of the screen, and all non-menu related elements inside the menubar will be ignored.
... to look native (at least on windows), the menubar element needs to be placed inside a toolbox element.
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preferences - Archive of obsolete content
Archive › Mozilla › XUL › preferences
« xul reference home [ examples | attributes | properties | methods | related ] overview <preferences> is a container for <preference> elements.
... it's supposed to be a child of <prefpane> element.
... <preferences> element should contain one or more <preference> elements.
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rows - Archive of obsolete content
Archive › Mozilla › XUL › rows
child row elements define the individual rows to appear in the grid.
... each child of a rows element should be a row element.
... the rows element may be nested inside another rows element.
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rule - Archive of obsolete content
Archive › Mozilla › XUL › rule
a rule may contain where, binding and/or action elements.
... a condition is defined used a where element.
...the bindings element is optional and may specify additional variable bindings to be used.
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separator - Archive of obsolete content
Archive › Mozilla › XUL › separator
« xul reference home [ examples | attributes | properties | methods | related ] creates a small separating gap between elements.
... horizontal the separator separates vertically placed elements.
... vertical the separator separates horizontally placed elements.
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stack - Archive of obsolete content
Archive › Mozilla › XUL › stack
« xul reference home [ examples | attributes | properties | methods | related ] an element that renders its children on top of each other.
... the first element is placed on the bottom and each successive child is placed above the previous.
... all elements are displayed at once.
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tabpanels - Archive of obsolete content
Archive › Mozilla › XUL › tabpanels
the tabpanels element should be placed in a tabbox although it does not have to be a direct child.
... the children of the tabpanels element become the panels of the tabbox.
... in most cases you would use a vbox, but they can be any element, although some people like to use tabpanel elements.
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titlebar - Archive of obsolete content
Archive › Mozilla › XUL › titlebar
« xul reference home [ examples | attributes | properties | methods | related ] boxes created with the titlebar element behave just like a normal window titlebar: when the element is clicked and dragged, the window moves with it.
... this element can't be used to change the platform-native titlebar of normal windows; instead, it's used to create custom titlebars for chromeless windows.
... if the titlebar is in a panel element, dragging it will move the panel.
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Why RSS Content Module is Popular - Including HTML Contents - Archive of obsolete content
Archive › RSS › Article › Why RSS Content Module is Popular - Including HTML Contents
rss has long had the <description> element that can be used to include the contents of an <item>.
...however, the rss <description> element is only suppose to be used to includeplain text data.
...and since many peoplewrite in html information and formatting is lost with the rss <description> element.
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display-inside - Archive of obsolete content
Archive › Web › CSS › display-inside
the display-inside css property specifies the inner display type of the box generated by an element, dictating how its contents lay out inside the box.
... values auto if the element's computed <display-outside> value is inline-level, the element is an inline element, and lays out its contents using inline layout.
... if the element's computed <display-outside> value is an layout-specific internal type, this elements acts as normal for its given <display-outside> value.
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Advanced styling effects - Learn web development
Learn › CSS › Building blocks › Advanced styling effects
box shadows box-shadow allows you to apply one or more drop shadows to an element's box.
... you can apply filters to any element and not just images.
... blend modes css blend modes allow us to add blend modes to elements that specify a blending effect when two elements overlap — the final color shown for each pixel will be the result of a combination of the original pixel color, and that of the pixel in the layer underneath it.
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Fundamental CSS comprehension - Learn web development
Learn › CSS › Building blocks › Fundamental CSS comprehension
you could paste the html and fill in the css into one of these online editors, and use this url to point the <img> element to the image file.
... if the online editor you are using doesn't have a separate css panel, feel free to put it in a <style> element in the head of the document.
... link your css to your html file via a <link> element.
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Styling lists - Learn web development
Learn › CSS › Styling text › Styling lists
ther ingredients.</dd> <dt>pita</dt> <dd>a soft, slightly leavened flatbread.</dd> <dt>halloumi</dt> <dd>a semi-hard, unripened, brined cheese with a higher-than-usual melting point, usually made from goat/sheep milk.</dd> <dt>green salad</dt> <dd>that green healthy stuff that many of us just use to garnish kebabs.</dd> </dl> if you go to the live example now and investigate the list elements using browser developer tools, you'll notice a couple of styling defaults: the <ul> and <ol> elements have a top and bottom margin of 16px (1em) and a padding-left of 40px (2.5em.) the list items (<li> elements) have no set defaults for spacing.
... the <dl> element has a top and bottom margin of 16px (1em), but no padding set.
... the <dd> elements have margin-left of 40px (2.5em.) the <p> elements we've included for reference have a top and bottom margin of 16px (1em), the same as the different list types.
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Cooperative asynchronous JavaScript: Timeouts and intervals - Learn web development
Learn › JavaScript › Asynchronous › Timeouts and intervals
it then runs the function once per second using setinterval(), creating the effect of a digital clock that updates once per second (see this live, and also see the source): function displaytime() { let date = new date(); let time = date.tolocaletimestring(); document.getelementbyid('demo').textcontent = time; } const createclock = setinterval(displaytime, 1000); just like settimeout(), setinterval() returns an identifying value you can use later when you need to clear the interval.
... put an empty <div> element inside the <body>, then add a ↻ character inside it.
... html { background-color: white; height: 100%; } body { height: inherit; background-color: red; margin: 0; display: flex; justify-content: center; align-items: center; } div { display: inline-block; font-size: 10rem; } insert a <script> element just above the closing </body> tag.
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Looping code - Learn web development
Learn › JavaScript › Building blocks › Looping code
let's say we wanted to draw 100 random circles on a <canvas> element (press the update button to run the example again and again to see different random sets): hidden code <!doctype html> <html> <head> <meta charset="utf-8"> <title>random canvas circles</title> <style> html { width: 100%; height: inherit; background: #ddd; } canvas { display: block; } body { margin: 0; }...
... button { position: absolute; top: 5px; left: 5px; } </style> </head> <body> <button>update</button> <canvas></canvas> <script> const btn = document.queryselector('button'); const canvas = document.queryselector('canvas'); const ctx = canvas.getcontext('2d'); let width = document.documentelement.clientwidth; let height = document.documentelement.clientheight; canvas.width = width; canvas.height = height; function random(number) { return math.floor(math.random()*number); } function draw() { ctx.clearrect(0,0,width,height); for (let i = 0; i < 100; i++) { ctx.beginpath(); ctx.fillstyle = 'rgba(255,0,0,0.5)'; ctx.arc(random(width), random(height), random(50),...
...first, some simple html — a text <input> allowing us to enter a name to search for, a <button> element to submit a search, and a <p> element to display the results in: <label for="search">search by contact name: </label> <input id="search" type="text"> <button>search</button> <p></p> now on to the javascript: const contacts = ['chris:2232322', 'sarah:3453456', 'bill:7654322', 'mary:9998769', 'dianne:9384975']; const para = document.queryselector('p'); const input = document.queryselector('inpu...
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Arrays - Learn web development
Learn › JavaScript › First steps › Arrays
creating arrays arrays consist of square brackets and elements that are separated by commas.
...paste the following code into the console: let shopping = ['bread', 'milk', 'cheese', 'hummus', 'noodles']; shopping; in the above example, each element is a string, but in an array we can store various data types — strings, numbers, objects, and even other arrays.
...selector('.output p'); let total = 0; list.innerhtml = ''; totalbox.textcontent = ''; // number 1 'underpants:6.99' 'socks:5.99' 't-shirt:14.99' 'trousers:31.99' 'shoes:23.99'; for (let i = 0; i <= 0; i++) { // number 2 // number 3 // number 4 // number 5 let itemtext = 0; const listitem = document.createelement('li'); listitem.textcontent = itemtext; list.appendchild(listitem); } totalbox.textcontent = 'total: $' + total.tofixed(2); </textarea> <div class="playable-buttons"> <input id="reset" type="button" value="reset"> <input id="solution" type="button" value="show solution"> </div> const textarea = document.getelementbyid('code'); const reset = document.getelementbyid('reset'); const solu...
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Working with JSON - Learn web development
Learn › JavaScript › Objects › JSON
the latter contains some simple css to style our page, while the former contains some very simple body html: <header> </header> <section> </section> plus a <script> element to contain the javascript code we will be writing in this exercise.
... at the moment it only contains two lines, which grab references to the <header> and <section> elements and store them in variables: const header = document.queryselector('header'); const section = document.queryselector('section'); we have made our json data available on our github, at https://mdn.github.io/learning-area/javascript/oojs/json/superheroes.json.
...first of all, add the following function definition below the previous code: function populateheader(jsonobj) { const myh1 = document.createelement('h1'); myh1.textcontent = jsonobj['squadname']; header.appendchild(myh1); const mypara = document.createelement('p'); mypara.textcontent = 'hometown: ' + jsonobj['hometown'] + ' // formed: ' + jsonobj['formed']; header.appendchild(mypara); } we named the parameter jsonobj, to remind ourselves that this javascript object originated from json.
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Rendering a list of Vue components - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Vue rendering lists
directives are applied to elements like other attributes.
... in case of v-for, you use a special syntax similar to a for...in loop in javascript — v-for="item in items" — where items is the array you want to iterate over, and item is a reference to the current element in the array.
... v-for attaches to the element you want to repeat, and renders that element and its children.
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Styling Vue components with CSS - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Vue styling
these styles do a few things — adding some styling to buttons and inputs, and customizing the #app element and its children.
... update your app.vue file’s <style> element so it looks like so: <style> /* global styles */ .btn { padding: 0.8rem 1rem 0.7rem; border: 0.2rem solid #4d4d4d; cursor: pointer; text-transform: capitalize; } .btn__danger { color: #fff; background-color: #ca3c3c; border-color: #bd2130; } .btn__filter { border-color: lightgrey; } .btn__danger:focus { outline-color: #c82333; } .btn__primary { color: #fff; background-color: #000; } .btn-group { display: flex; justify-content: space-between; } .btn-group > * { flex: 1 1 auto; } .btn-group > * + * { margin-left: 0.8rem; } .label-wrapper { margin: 0; flex: 0 0 100%; text-align: center; } [class*="__lg"] { display: inline-block; width: 100%; font-size: 1.9rem; } [class*="__lg"]:not(:last-child) { margin-botto...
...since vue templates are valid html, this is done in the same way to how you might do it in plain html — by adding a class="" attribute to the element.
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Gecko info for Windows accessibility vendors
Mozilla › Accessibility › Gecko info for Windows accessibility vendors
in total, gecko supports the following window classes: mozillauiwindowclass - root ui window, at the root of the window hierarchy mozillacontentwindowclass -- root document window mozillacontentframewindowclass - root of a subdocument created by a <frame> or <iframe> element mozillahiddenwindowclass - ignore these windows, they are used to help manage other windows mozillawindowclass - general filler window, a catch all starting in firefox 2, however, you should begin switching your code to use navrelation_embeds.
... the role string may be an html tag name followed by comma, space and the namespace of the current element.
...this makes it important to check the state_readonly flag when encountering a role_list, because the html list form element also uses role_list, but without state_readonly set.
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The Firefox codebase: CSS Guidelines
Mozilla › Developer guide › CSS Guidelines
some examples to avoid: absolutely positioned elements hardcoded values such as: vertical-align: -2px; .
... also, it is good practice to introduce a common class when the new element you are styling reuses some styles from another element, this allows the maintenance cost and the amount of code duplication to be reduced.
...if this isn't possible, you can also try introducing a :not() to prevent the other rule from applying, this is especially relevant for different element states (:hover, :active, [checked] or [disabled]).
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JS_SetArrayLength
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS SetArrayLength
length uint32_t number of array elements to set.
...length indicates the number of elements.
...you can call js_setarraylength either to set the number of elements for an array object you created without specifying an initial number of elements, or to change the number of elements allocated for an array.
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nsIWindowMediator
Mozilla › Tech › XPCOM › Reference › Interface › nsIWindowMediator
("type" is the |windowtype| attribute of the xml <window> element.) if null, all windows will be enumerated.
...("type" is the |windowtype| attribute of the xml <window> element.) if null, return the topmost window of any type.
... nsisimpleenumerator getxulwindowenumerator( in wstring awindowtype ); parameters awindowtype the returned enumerator will enumerate only windows of this type; that is, the windowtype attribute of the xul window element.
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ArrayType
Mozilla › js-ctypes › js-ctypes reference › ArrayType
ctype arraytype() type[ length] ); parameters type: it represents the type of the elements or variable which is going to be present in an array length optional it denotes the number of entries present in an array or the number of elements that an array should contain.
... properties property type description elementtype ctype the data type of the elements in an array type.
... length number the number of elements in the array, or undefined if the array type doesn't have a specified length.
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Break on DOM mutation - Firefox Developer Tools
Tools › Debugger › Break on DOM mutation
there are three choices: subtree modification execution pauses if any of the elementʼs descendant nodes are modified.
... that means, the script execution is stopped whenever a child node or descendant node deeper in the dom structure is added to or removed from the element the option is set on.
... examples for when this breakpoint is triggered are calling node.appendchild() and node.removechild(), calling childnode.remove() or setting element.innerhtml on one of the subnodes.
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CSS Flexbox Inspector: Examine Flexbox layouts - Firefox Developer Tools
Tools › Page Inspector › How to › Examine Flexbox layouts
discovering flex containers when an html element on your page has display: flex applied to it, a number of features are made available in the devtools to provide easy access to flexbox layout features.
... in the html pane in the html pane, an element laid out with flexbox has the word flex next to it as shown in the following image: click the word flex in the html pane to keep the overlay visible when you move the mouse away from the container.
... in the infobar when you hover over an element in the html pane, you will see a tooltip that gives you more information about the element.
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Animating CSS properties - Firefox Developer Tools
Tools › Performance › Scenarios › Animating CSS properties
with css animations you specify a number of keyframes, each of which uses css to define the appearance of the element at a particular stage of the animation.
... compared with animating elements using javascript, css animations can be easier to create.
... the css rendering waterfall the process the browser uses to update the page when a css property has changed can be described as a waterfall consisting of the following steps: recalculate style: every time a css property for an element changes, the browser must recalculate computed styles.
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AbstractRange - Web APIs
Web › API › AbstractRange
contents of elements when trying to access the contents of an element, keep in mind that the element itself is a node, but so is any text inside it.
... in order to set a range endpoint within the text of an element, be sure to find the text node inside the element: let startelem = document.queryselector("p"); let endelem = startelem.queryselector("span"); let range = document.createrange(); range.setstart(startelem, 0); range.setend(endelem, endelem.childnodes[0].length/2); let contents = range.clonecontents(); document.body.appendchild(contents); this example creates a new range, rng, and sets its starting point to the third child node of the first element whose class is elementclass.
...g thing happened on the way to the forum...</p> <aside class="callout"> <h2>aside</h2> <p>an interesting aside to share with you...</p> </aside> </section> </article> <pre id="log"></pre> </div> after loading the html and constructing the dom representation of the document, the resulting dom tree looks like this: in this diagram, the nodes representing html elements are shown in green.
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AudioTrackList - Web APIs
Web › API › AudioTrackList
the audiotracklist interface is used to represent a list of the audio tracks contained within a given html media element, with each track represented by a separate audiotrack object in the list.
... retrieve an instance of this object with htmlmediaelement.audiotracks.
... event handlers onaddtrack an event handler to be called when the addtrack event is fired, indicating that a new audio track has been added to the media element.
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Basic animations - Web APIs
Web › API › Canvas API › Tutorial › Basic animations
« previousnext » since we're using javascript to control <canvas> elements, it's also very easy to make (interactive) animations.
... var sun = new image(); var moon = new image(); var earth = new image(); function init() { sun.src = 'https://mdn.mozillademos.org/files/1456/canvas_sun.png'; moon.src = 'https://mdn.mozillademos.org/files/1443/canvas_moon.png'; earth.src = 'https://mdn.mozillademos.org/files/1429/canvas_earth.png'; window.requestanimationframe(draw); } function draw() { var ctx = document.getelementbyid('canvas').getcontext('2d'); ctx.globalcompositeoperation = 'destination-over'; ctx.clearrect(0, 0, 300, 300); // clear canvas ctx.fillstyle = 'rgba(0, 0, 0, 0.4)'; ctx.strokestyle = 'rgba(0, 153, 255, 0.4)'; ctx.save(); ctx.translate(150, 150); // earth var time = new date(); ctx.rotate(((2 * math.pi) / 60) * time.getseconds() + ((2 * math.pi) / 60000) * time.getmilliseco...
... function clock() { var now = new date(); var ctx = document.getelementbyid('canvas').getcontext('2d'); ctx.save(); ctx.clearrect(0, 0, 150, 150); ctx.translate(75, 75); ctx.scale(0.4, 0.4); ctx.rotate(-math.pi / 2); ctx.strokestyle = 'black'; ctx.fillstyle = 'white'; ctx.linewidth = 8; ctx.linecap = 'round'; // hour marks ctx.save(); for (var i = 0; i < 12; i++) { ctx.beginpath(); ctx.rotate(math.pi / 6); ctx.moveto(100, 0); ...
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Document Object Model (DOM) - Web APIs
Web › API › Document Object Model
dom interfaces attr cdatasection characterdata childnode comment customevent document documentfragment documenttype domerror domexception domimplementation domstring domtimestamp domstringlist domtokenlist element event eventtarget htmlcollection mutationobserver mutationrecord namednodemap node nodefilter nodeiterator nodelist nondocumenttypechildnode parentnode processinginstruction selection range text textdecoder textencoder timeranges treewalker url window worker xmldocument obsolete dom interfaces the document object model has been highly simplified.
...it is uncertain whether some may be reintroduced in the future or not, but for the time being they should be considered obsolete and should be avoided: documenttouch domconfiguration domerrorhandler domimplementationlist domimplementationregistry domimplementationsource domlocator domobject domsettabletokenlist domuserdata elementtraversal entity entityreference namelist notation typeinfo userdatahandler html dom a document containing html is described using the document interface, which is extended by the html specification to include various html-specific features.
... in particular, the element interface is enhanced to become htmlelement and various subclasses, each representing one of (or a family of closely related) elements.
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DragEvent - Web APIs
Web › API › DragEvent
the user initiates a drag by placing a pointer device (such as a mouse) on the touch surface and then dragging the pointer to a new location (such as another dom element).
... event types drag this event is fired when an element or text selection is being dragged.
... dragenter this event is fired when a dragged element or text selection enters a valid drop target.
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Audio() - Web APIs
Web › API › HTMLAudioElement › Audio
the audio() constructor creates and returns a new htmlaudioelement which can be either attached to a document for the user to interact with and/or listen to, or can be used offscreen to manage and play audio.
... syntax audioobj = new audio(url); parameters url optional an optional domstring containing the url of an audio file to be associated with the new audio element.
... return value a new htmlaudioelement object, configured to be used for playing back the audio from the file specified by url.the new object's preload property is set to auto and its src property is set to the specified url or null if no url is given.
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Using microtasks in JavaScript with queueMicrotask() - Web APIs
Web › API › HTML DOM API › Microtask guide
tasks get added to the task queue when: a new javascript program or subprogram is executed (such as from a console, or by running the code in a <script> element) directly.
...consider code such as this: customelement.prototype.getdata = url => { if (this.cache[url]) { this.data = this.cache[url]; this.dispatchevent(new event("load")); } else { fetch(url).then(result => result.arraybuffer()).then(data => { this.cache[url] = data; this.data = data; this.dispatchevent(new event("load")); }); } }; the problem introduced here is that by using a task in one branch of the if.
... element.addeventlistener("load", () => console.log("loaded data")); console.log("fetching data..."); element.getdata(); console.log("data fetched"); executing this code twice in a row gives the results shown in the table below: results when data isn't cached (left) vs.
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LargestContentfulPaint - Web APIs
Web › API › LargestContentfulPaint
properties largestcontentfulpaint.element the element that is the current largest contentful paint.
... largestcontentfulpaint.rendertime the time the element was rendered to the screen.
... may not be available if the element is a cross-origin image loaded without the timing-allow-origin header.
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Node.insertBefore() - Web APIs
Web › API › Node › insertBefore
example example 1 <div id="parentelement"> <span id="childelement">foo bar</span> </div> <script> // create the new node to insert let newnode = document.createelement("span") // get a reference to the parent node let parentdiv = document.getelementbyid("childelement").parentnode // begin test case [ 1 ] : existing childelement (all works correctly) let sp2 = document.getelementbyid("childelement") parentdiv.insertbefore(newnode, ...
...sp2) // end test case [ 1 ] // begin test case [ 2 ] : childelement is of type undefined let sp2 = undefined // non-existent node of id "childelement" parentdiv.insertbefore(newnode, sp2) // implicit dynamic cast to type node // end test case [ 2 ] // begin test case [ 3 ] : childelement is of type "undefined" ( string ) let sp2 = "undefined" // non-existent node of id "childelement" parentdiv.insertbefore(newnode, sp2) // generates "type error: invalid argument" // end test case [ 3 ] </script> example 2 <div id="parentelement"> <span id="childelement">foo bar</span> </div> <script> // create a new, plain <span> element let sp1 = document.createelement("span") // get the reference element let sp2 = document.getelementbyid("childelement") // get the parent element let parentdiv = sp2.par...
...entnode // insert the new element into before sp2 parentdiv.insertbefore(sp1, sp2) </script> note: there is no insertafter() method.
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NonDocumentTypeChildNode - Web APIs
Web › API › NonDocumentTypeChildNode
nondocumenttypechildnode is a raw interface and no object of this type can be created; it is implemented by element, and characterdata objects.
... nondocumenttypechildnode.previouselementsibling read only returns the element immediately prior to this node in its parent's children list, or null if there is no element in the list prior to this node.
... nondocumenttypechildnode.nextelementsibling read only returns the element immediately following this node in its parent's children list, or null if there is no element in the list following this node.
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Using Pointer Events - Web APIs
Web › API › Pointer events › Using Pointer Events
this guide demonstrates how to use pointer events and the html <canvas> element to build a multi-touch enabled drawing application.
... <canvas id="canvas" width="600" height="600" style="border:solid black 1px; touch-action:none"> your browser does not support canvas element.
... </canvas> <br> <button onclick="startup()">initialize</button> <br> log: <pre id="log" style="border: 1px solid #ccc;"></pre> setting up the event handlers when the page loads, the startup() function shown below should be called by our <body> element's onload attribute (but in the example we use a button to trigger it, due to limitations of the mdn live example system).
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Text - Web APIs
Web › API › Text
the text interface represents the textual content of element or attr.
... if an element has no markup within its content, it has a single child implementing text that contains the element's text.
... however, if the element contains markup, it is parsed into information items and text nodes that form its children.
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TextTrackList - Web APIs
Web › API › TextTrackList
the texttracklist interface is used to represent a list of the text tracks defined by the <track> element, with each track represented by a separate texttrack object in the list.
... retrieve an instance of this object with htmlmediaelement.texttracks.
... event handlers onaddtrack an event handler to be called when the addtrack event is fired, indicating that a new text track has been added to the media element.
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Touch.target - Web APIs
Web › API › Touch › target
summary returns the element (eventtarget) on which the touch contact started when it was first placed on the surface, even if the touch point has since moved outside the interactive area of that element or even been removed from the document.
... note that if the target element is removed from the document, events will still be targeted at it, and hence won't necessarily bubble up to the window or document anymore.
... if there is any risk of an element being removed while it is being touched, the best practice is to attach the touch listeners directly to the target.
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Using Touch Events - Web APIs
Web › API › Touch events › Using Touch Events
a touch point's properties include a unique identifier, the touch point's target element as well as the x and y coordinates of the touch point's position relative to the viewport, page, and screen.
... targettouches - a list of the touch points on the target dom element.
...for example, if an application supports a single touch (tap) on one element, it would use the targettouches list in the touchstart event handler to process the touch point in an application-specific manner.
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VideoTrackList - Web APIs
Web › API › VideoTrackList
the videotracklist interface is used to represent a list of the video tracks contained within a <video> element, with each track represented by a separate videotrack object in the list.
... retrieve an instance of this object with htmlmediaelement.videotracks.
... event handlers onaddtrack an event handler to be called when the addtrack event is fired, indicating that a new video track has been added to the media element.
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WebGL best practices - Web APIs
Web › API › WebGL API › WebGL best practices
take advantage of universally supported webgl 1 extensions these webgl 1 extensions are universally supported: angle_instanced_arrays ext_blend_minmax oes_element_index_uint oes_standard_derivatives oes_vertex_array_object webgl_debug_renderer_info webgl_lose_context (see also: https://jdashg.github.io/misc/webgl/webgl-feature-levels.html) consider polyfilling these into webglrenderingcontext, like: https://github.com/jdashg/misc/blob/master/webgl/webgl-v1.1.js universally supported limits the minimum requirements for webgl are quite low.
...if you have 1000 sprites to paint, try to do it as a single drawarrays() or drawelements() call.
... teximage/texsubimage uploads (particularly with videos) can cause pipeline flushes most texture uploads from dom elements will incur a processing pass that will temporarily switch gl progams internally, causing a pipeline flush.
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Using the Web Audio API - Web APIs
Web › API › Web Audio API › Using Web Audio API
the web audio api does not replace the <audio> media element, but rather complements it, just like <canvas> coexists alongside the <img> element.
...if you simply want to control playback of an audio track, the <audio> media element provides a better, quicker solution than the web audio api.
...we'll expose the song on the page using an <audio> element.
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Window.pageYOffset - Web APIs
Web › API › Window › pageYOffset
ut auctor eros tortor, vel elementum arcu rhoncus nec.
...etiam sodales suscipit urna, eget hendrerit neque elementum a.
...integer euismod lectus a ipsum pellentesque lacinia.</p> `; document.getelementbyid("frame").contentdocument .body.innerhtml = contenthtml; in this example, an <iframe> is created and filled with content, then a specific element within the document is scrolled into view in the frame.
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ARIA: Navigation Role - Accessibility
Web › Accessibility › ARIA › Roles › Navigation Role
like the html <nav> element, navigation landmarks provide a way to identify groups (e.g.
... it is preferable to use the html5 <nav> element to define a navigation landmark.
... if the html5 nav element technique is not being used, use a role="navigation" attribute to define a navigation landmark.
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ARIA: switch role - Accessibility
Web › Accessibility › ARIA › Roles › Switch role
if the role is applied to a non-focusable element, use the tabindex attribute to change this.
... possible effects on user agents and assistive technology when the switch role is added to an element, the user agent handles it like this: the element is exposed to the system's accessibility infrastructure as having the switch role.
... all elements that are descendants of an element with the switch role applied to it are automatically assigned role presentation.
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ARIA: checkbox role - Accessibility
Web › Accessibility › ARIA › Roles › checkbox role
elements containing role="checkbox" must also include the aria-checked attribute to expose the checkbox's state to assistive technology.
... <span role="checkbox" aria-checked="false" tabindex="0" aria-labelledby="chk1-label"> </span> <label id="chk1-label">remember my preferences</label> the first rule of aria is if a native html element or attribute has the semantics and behavior you require, use it instead of re-purposing an element and adding aria.
...similarly, an element with role="checkbox" can expose three states through the aria-checked attribute: true, false, or mixed.
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Basic form hints - Accessibility
Web › Accessibility › ARIA › forms › Basic form hints
when implementing forms using traditional html form-related elements, it is important to provide labels for controls, and explicitly associate a label with its control.
...note that each <input> element has an id, and each <label> element has a for attribute, indicating the id of the associated <input>.
..." value="pinot-blanc"/> <label for="wine-2">pinot blanc</label> </li> <li> <input id="wine-3" type="checkbox" value="pinot-grigio"/> <label for="wine-3">pinot grigio</label> </li> <li> <input id="wine-4" type="checkbox" value="gewurztraminer"/> <label for="wine-4">gewürztraminer</label> </li> </ul> </form> labeling with aria the html <label> element is appropriate for form-related elements, but many form controls are implemented as a dynamic javascript widget, using <div>s or <span>s.
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HTML To MSAA - Accessibility
Web › Accessibility › HTML To MSAA
remarks the table below shows how gecko maps html elements to msaa.
... this table reflects mapping rules for specific elements only, it doesn't reflect any general rules applicable to all elements.
... for example, if name column has n/a value then it means specific elements doesn't provide own rules to calculate name but name can be computed from aria markup or @title attribute.
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-moz-user-focus - CSS: Cascading Style Sheets
Web › CSS › -moz-user-focus
the -moz-user-focus css property is used to indicate whether an element can have the focus.
... /* keyword values */ -moz-user-focus: normal; -moz-user-focus: ignore; /* global values */ -moz-user-focus: inherit; -moz-user-focus: initial; -moz-user-focus: unset; by setting its value to ignore, you can disable focusing the element, which means that the user will not be able to activate the element.
... the element will be skipped in the tab sequence.
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::before (:before) - CSS: Cascading Style Sheets
Web › CSS › ::before
in css, ::before creates a pseudo-element that is the first child of the selected element.
... it is often used to add cosmetic content to an element with the content property.
... /* add a heart before links */ a::before { content: "♥"; } note: the pseudo-elements generated by ::before and ::after are contained by the element's formatting box, and thus don't apply to replaced elements such as <img>, or to <br> elements.
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::first-letter (:first-letter) - CSS: Cascading Style Sheets
Web › CSS › ::first-letter
the ::first-letter css pseudo-element applies styles to the first letter of the first line of a block-level element, but only when not preceded by other content (such as images or inline tables).
... /* selects the first letter of a <p> */ p::first-letter { font-size: 130%; } the first letter of an element is not always trivial to identify: punctuation that precedes or immediately follows the first letter is included in the match.
...in these cases, both letters of the digraph should be matched by the ::first-letter pseudo-element.
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:host() - CSS: Cascading Style Sheets
Web › CSS › :host()
the :host() css pseudo-class function selects the shadow host of the shadow dom containing the css it is used inside (so you can select a custom element from inside its shadow dom) — but only if the selector given as the function's parameter matches the shadow host.
... the most obvious use of this is to put a class name only on certain custom element instances, and then include the relevant class selector as the function argument.
... you can't use this with a descendant selector expression to select only instances of the custom element that are inside a particular ancestor.
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CSS Grid Layout and Accessibility - CSS: Cascading Style Sheets
Web › CSS › CSS Grid Layout › CSS Grid Layout and Accessibility
if we need to add an element we can use something with no semantic meaning.
...grid can be really very useful here, elements deprioritized in the mobile source order can be moved into a sidebar in a desktop layout, for example.
... returning to the source if at any time in the design process you find yourself using grid to relocate the position of an element, consider whether you should return to your document and make a change to the logical order too.
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Using CSS transitions - CSS: Cascading Style Sheets
Web › CSS › CSS Transitions › Using CSS transitions
for example, if you change the color of an element from white to black, usually the change is instantaneous.
...x1"); el.classname = "box"; } return el; } var intervalid = window.setinterval(updatetransition, 7000); the shorthand css syntax is written as follows: div { transition: <property> <duration> <timing-function> <delay>; } examples simple example this example performs a four-second font size transition with a two-second delay between the time the user mouses over the element and the beginning of the animation effect: #delay { font-size: 14px; transition-property: font-size; transition-duration: 4s; transition-delay: 2s; } #delay:hover { font-size: 36px; } multiple animated properties example html content <body> <p>the box below combines transitions for: width, height, background-color, transform.
...the relevant portions are shown here: a { color: #fff; background-color: #333; transition: all 1s ease-out; } a:hover, a:focus { color: #333; background-color: #fff; } this css establishes the look of the menu, with the background and text colors both changing when the element is in its :hover and :focus states.
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box-flex-group - CSS: Cascading Style Sheets
Web › CSS › box-flex-group
the box-flex-group css property assigns the flexbox's child elements to a flex group.
... /* <integer> values */ box-flex-group: 1; box-flex-group: 5; /* global values */ box-flex-group: inherit; box-flex-group: initial; box-flex-group: unset; for flexible elements assigned to flex groups, the first flex group is 1 and higher values specify subsequent flex groups.
...when dividing up the box's extra space, the browser first considers all elements within the first flex group.
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box-flex - CSS: Cascading Style Sheets
Web › CSS › box-flex
notes the containing box allocates the available extra space in proportion to the flex value of each of the content elements.
... content elements that have zero flex do not grow.
... if only one content element has nonzero flex, then it grows to fill the available space.
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<display-outside> - CSS: Cascading Style Sheets
Web › CSS › display-outside
the <display-outside> keywords specify the element’s outer display type, which is essentially its role in flow layout.
... syntax valid <display-outside> values: block the element generates a block element box, generating line breaks both before and after the element when in the normal flow.
... inline the element generates one or more inline element boxes that do not generate line breaks before or after themselves.
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Inheritance - CSS: Cascading Style Sheets
Web › CSS › inheritance
in css, inheritance controls what happens when no value is specified for a property on an element.
... css properties can be categorized in two types: inherited properties, which by default are set to the computed value of the parent element non-inherited properties, which by default are set to initial value of the property refer to any css property definition to see whether a specific property inherits by default ("inherited: yes") or not ("inherited: no").
... inherited properties when no value for an inherited property has been specified on an element, the element gets the computed value of that property on its parent element.
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outline-offset - CSS: Cascading Style Sheets
Web › CSS › outline-offset
the outline-offset css property sets the amount of space between an outline and the edge or border of an element.
... syntax /* <length> values */ outline-offset: 3px; outline-offset: 0.2em; /* global values */ outline-offset: inherit; outline-offset: initial; outline-offset: unset; values <length> the width of the space between the element and its outline.
... a negative value places the outline inside the element.
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transform-style - CSS: Cascading Style Sheets
Web › CSS › transform-style
the transform-style css property sets whether children of an element are positioned in the 3d space or are flattened in the plane of the element.
... if flattened, the element's children will not exist on their own in the 3d-space.
... as this property is not inherited, it must be set for all non-leaf descendants of the element.
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Media events - Developer guides
Web › Guide › Events › Media events
various events are sent when handling media that are embedded in html documents using the <audio> and <video> elements; this section lists them and provides some helpful information about using them.
... the element's error attribute contains more information.
... see htmlmediaelement.error for details.
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<area> - HTML: Hypertext Markup Language
Web › HTML › Element › area
the html <area> element defines a hot-spot region on an image, and optionally associates it with a hypertext link.
... this element is used only within a <map> element.
... permitted content none, it is an empty element.
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<font> - HTML: Hypertext Markup Language
Web › HTML › Element › font
summary the html font element (<font>) defines the font size, color and face for its content.
... usage note: do not use this element!
... though once normalized in html 3.2, it was deprecated in html 4.01, at the same time as all elements related to styling only, then made obsolete in html5.
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<footer> - HTML: Hypertext Markup Language
Web › HTML › Element › footer
the html <footer> element represents a footer for its nearest sectioning content or sectioning root element.
... permitted parents any element that accepts flow content.
... note that a <footer> element must not be a descendant of an <address>, <header> or another <footer> element.
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<hgroup> - HTML: Hypertext Markup Language
Web › HTML › Element › hgroup
the html <hgroup> element represents a multi-level heading for a section of a document.
... it groups a set of <h1>–<h6> elements.
... permitted parents any element that accepts flow content.
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<input type="password"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › password
<input> elements of type password provide a way for the user to securely enter a password.
... the element is presented as a one-line plain text editor control in which the text is obscured so that it cannot be read, usually by replacing each character with a symbol such as the asterisk ("*") or a dot ("•").
... additional attributes in addition to the attributes that operate on all <input> elements regardless of their type, password field inputs support the following attributes: attribute description maxlength the maximum length the value may be, in utf-16 characters minlength the minimum length in characters that will be considered valid pattern a regular expression the value must match in order to be valid placeholder an ex...
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<time> - HTML: Hypertext Markup Language
Web › HTML › Element › time
the html <time> element represents a specific period in time.
... permitted parents any element that accepts phrasing content.
... implicit aria role no corresponding role permitted aria roles any dom interface htmltimeelement attributes like all other html elements, this element supports the global attributes.
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HTML reference - HTML: Hypertext Markup Language
Web › HTML › Reference
this html reference describes all elements and attributes of html, including global attributes that apply to all elements.
... html element reference this page lists all the html elements, which are created using tags.
... html attribute reference elements in html have attributes; these are additional values that configure the elements or adjust their behavior in various ways to meet the criteria the users want.
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Closures - JavaScript
Web › JavaScript › Closures
one way of doing this is to specify the font-size of the body element (in pixels), and then set the size of the other elements on the page (such as headers) using the relative em unit: body { font-family: helvetica, arial, sans-serif; font-size: 12px; } h1 { font-size: 1.5em; } h2 { font-size: 1.2em; } such interactive text size buttons can change the font-size property of the body element, and the adjustments are picked up by other elements on the pag...
... document.getelementbyid('size-12').onclick = size12; document.getelementbyid('size-14').onclick = size14; document.getelementbyid('size-16').onclick = size16; <a href="#" id="size-12">12</a> <a href="#" id="size-14">14</a> <a href="#" id="size-16">16</a> run the code using jsfiddle.
... <p id="help">helpful notes will appear here</p> <p>e-mail: <input type="text" id="email" name="email"></p> <p>name: <input type="text" id="name" name="name"></p> <p>age: <input type="text" id="age" name="age"></p> function showhelp(help) { document.getelementbyid('help').innerhtml = help; } function setuphelp() { var helptext = [ {'id': 'email', 'help': 'your e-mail address'}, {'id': 'name', 'help': 'your full name'}, {'id': 'age', 'help': 'your age (you must be over 16)'} ]; for (var i = 0; i < helptext.length; i++) { var item = helptext[i]; document.getelementbyid(item.id).onfocus = function() { showhelp(ite...
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Array.prototype.join() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › join
the join() method creates and returns a new string by concatenating all of the elements in an array (or an array-like object), separated by commas or a specified separator string.
... syntax arr.join([separator]) parameters separator optional specifies a string to separate each pair of adjacent elements of the array.
...if omitted, the array elements are separated with a comma (",").
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alignment-baseline - SVG: Scalable Vector Graphics
Web › SVG › Attribute › alignment-baseline
this property specifies which baseline of this element is to be aligned with the corresponding baseline of the parent.
... as a presentation attribute, it can be applied to any element but it has effect only on the following four elements: <tspan>, <tref>, <altglyph>, and <textpath> usage notes value auto | baseline | before-edge | text-before-edge | middle | central | after-edge | text-after-edge | ideographic | alphabetic | hanging | mathematical | top | center | bottom default value auto animatable yes auto the value is the dominant-baseline of the script to which the characte...
... before-edge the alignment-point of the object being aligned is aligned with the "before-edge" baseline of the parent text content element.
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path - SVG: Scalable Vector Graphics
Web › SVG › Attribute › path
the path attribute has two different meanings, either it defines a text path along which the characters of a text are rendered, or a motion path along which a referenced element is animated.
... two elements are using this attribute: <animatemotion> and <textpath> html, body, svg { height: 100%; } <svg viewbox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"> <path id="mypath" fill="none" stroke="silver" d="m10,90 q90,90 90,45 q90,10 50,10 q10,10 10,40 q10,70 45,70 q70,70 75,50" /> <text> <textpath path="m10,90 q90,90 90,45 q90,10 50,10 q10,10 10,40 q10,70 45,70 q70,70 75,50"> quick brown fox jumps over the lazy dog.
... </textpath> </text> </svg> animatemotion for <animatemotion>, path defines the motion path, expressed in the same format and interpreted the same way as the d geometric property for the <path> element.
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textLength - SVG: Scalable Vector Graphics
Web › SVG › Attribute › textLength
the textlength attribute, available on svg <text> and <tspan> elements, lets you specify the width of the space into which the text will draw.
... four elements are using this attribute: <text>, <textpath>, <tref>, and <tspan> html, body, svg { height: 100%; } <svg viewbox="0 0 200 60" xmlns="http://www.w3.org/2000/svg"> <text y="20" textlength="6em">small text length</text> <text y="40" textlength="120%">big text length</text> </svg> usage notes value <length-percentage> | <number> default value none ani...
... example let's create a simple example that presents text you can resize using an <input> element of type "range".
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SVG 1.1 Support in Firefox - SVG: Scalable Vector Graphics
Web › SVG › SVG 1.1 Support in Firefox
element implementation status a quick overview of the svg 1.1 elements and the current status of the native support.
... element notes structure module svg implemented.
... svgsvgelement unimplemented attributes: contentscripttype, contentstyletype, viewport, currentview unimplemented bindings: getintersectionlist, getenclosurelist, checkintersection, checkenclosure g implemented.
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SVG animation with SMIL - SVG: Scalable Vector Graphics
Web › SVG › SVG animation with SMIL
smil allows you to: animate the numeric attributes of an element (x, y, ...) animate transform attributes (translation or rotation) animate color attributes follow a motion path this is done adding an svg element like <animate> inside the svg element to animate.
... animating attributes of an element the following example animates the cx attribute of a circle.
... to do so, we add an <animate> element inside the <circle> element.
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Specification Deviations - SVG: Scalable Vector Graphics
Web › SVG › Specification Deviations
the 'class' and 'style' attributes unlike html and mathml, the svg specification does not specify the 'style' and 'class' attributes on all svg elements.
... nevertheless, to allow mozilla to more cleanly share internal 'class' and 'style' related code, we will implement these attributes on all svg elements as of firefox 3.
... in general this change will not be visible to svg authors (the elements for which the svg specification does not define the 'class' and 'style' attribute are elements that are not displayed directly).
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Paths - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Paths
« previousnext » the <path> element is the most powerful element in the svg library of basic shapes.
... the shape of a <path> element is defined by one parameter: d.
...we will start with a rectangle (the same type that could be more easily made with a <rect> element).
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Patterns - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Patterns
like gradients, the <pattern> element should be put in the <defs> section of your svg file.
..." y="0" width=".25" height=".25"> <rect x="0" y="0" width="50" height="50" fill="skyblue"/> <rect x="0" y="0" width="25" height="25" fill="url(#gradient2)"/> <circle cx="25" cy="25" r="20" fill="url(#gradient1)" fill-opacity="0.5"/> </pattern> </defs> <rect fill="url(#pattern)" stroke="black" width="200" height="200"/> </svg> screenshotlive sample inside the <pattern> element, you can include any of the other basic shapes you've included before, and each of them can be styled using any of the styles you've learned before, including gradients and opacity.
... here, we've just drawn two rectangle elements inside the pattern (which overlap, and one of which is twice the size of the other and is used to fill in the entire pattern), and one circle.
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SVG and CSS - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › SVG and CSS
note: elements referenced by <use> elements inherit the styles from that element.
...er petals */ #outer-petals { opacity: .75; --segment-fill-fill: azure; --segment-fill-stroke: lightsteelblue; --segment-fill-stroke-width: 1; --segment-edge-fill: none; --segment-edge-stroke: deepskyblue; --segment-edge-stroke-width: 3; --segment-fill-fill-hover: plum; --segment-fill-stroke-hover: none; --segment-edge-stroke-hover: slateblue; } /* non-standard way of styling elements referenced via <use> elements, supported by some older browsers */ #outer-petals .segment-fill { fill: azure; stroke: lightsteelblue; stroke-width: 1; } #outer-petals .segment-edge { fill: none; stroke: deepskyblue; stroke-width: 3; } #outer-petals .segment:hover > .segment-fill { fill: plum; stroke: none; } #outer-petals .segment:hover > .segment-edge { stroke: slateblue; ...
...} /* inner petals */ #inner-petals { --segment-fill-fill: yellow; --segment-fill-stroke: yellow; --segment-fill-stroke-width: 1; --segment-edge-fill: none; --segment-edge-stroke: yellowgreen; --segment-edge-stroke-width: 9; --segment-fill-fill-hover: darkseagreen; --segment-fill-stroke-hover: none; --segment-edge-stroke-hover: green; } /* non-standard way of styling elements referenced via <use> elements, supported by some older browsers */ #inner-petals .segment-fill { fill: yellow; stroke: yellow; stroke-width: 1; } #inner-petals .segment-edge { fill: none; stroke: yellowgreen; stroke-width: 9; } #inner-petals .segment:hover > .segment-fill { fill: darkseagreen; stroke: none; } #inner-petals .segment:hover > .segment-edge { stroke: green; } open the ...
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An Overview - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Transforming XML with XSLT › An Overview
the outermost element in an xslt stylesheet must be the <xsl:stylesheet> element (an acceptable alternate is the <xsl:transform> element).
... this element will include at least one namespace declaration and the mandatory version attribute.
...instead they are simply a way of specifying a unique identifier for a known set of elements.
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Using the WebAssembly JavaScript API - WebAssembly
WebAssembly › Using the JavaScript API
create a <script></script> element in your html file, and add the following code to it: var importobject = { imports: { imported_func: arg => console.log(arg) } }; streaming the webassembly module new in firefox 58 is the ability to compile and instantiate webassembly modules directly from underlying sources.
...add a <script></script> element to the page.
... tables have an element type, which limits the types of reference that can be stored in the table.
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Interacting with page scripts - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Guides › Content Scripts › Interacting with page scripts
expose objects to page scripts until firefox 30, you could use unsafewindow to perform the reverse procedure, and make objects defined in content scripts available to page scripts: // content-script.js unsafewindow.contentscriptobject = {"greeting" : "hello from add-on"}; // page-script.js var button = document.getelementbyid("show-content-script-var"); button.addeventlistener("click", function() { // access object defined by content script console.log(window.contentscriptobject.greeting); // "hello from add-on" }, false); after firefox 30, you can still do this for primitive values, but can no longer do it for objects.
... the "page.html" file adds two buttons and assigns an event listener to each: one listener displays a property of the cloned object, and the other listener displays a property of the assigned object: <html> <head> </head> <body> <input id="works" type="button" value="i will work"/> <input id="fails" type="button" value="i will not work"/> <script> var works = document.getelementbyid("works"); works.addeventlistener("click", function() { alert(clonedcontentscriptobject.greeting); }, false); var fails = document.getelementbyid("fails"); fails.addeventlistener("click", function() { alert(assignedcontentscriptobject.greeting); }, false); </script> </body> </html> if you run the example, clicking "i will work" displays th...
...tation = "hello, "; function greetme(user) { return salutation + user; } exportfunction(greetme, unsafewindow, {defineas: "greetme"}); finally, the "page.html" file adds a button and a page script that calls the exported function when the user pushes the button: <html> <head> </head> <body> <input id="test" type="button" value="click me"/> <script> var test = document.getelementbyid("test"); test.addeventlistener("click", function() { alert(window.greetme("page script")); }, false); </script> </body> </html> exportfunction() works by structured cloning the arguments and return value of the function from one scope to the other.
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ui/frame - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › ui frame
for example, this html document defines a <select> element and a couple of <span> elements, and includes a css file to style the content and a javascript script to implement behavior: <!doctype html> <html> <head> <link href="city-info.css" rel="stylesheet"></link> </head> <body> <select name="city" id="city-selector"></select> <span id="time" class="info-element"></span> <span id="weather" class="info-element"></span> <scrip...
...); if the frame script has received a message from the add-on already, it can use the origin property of the event object passed to the message hander: // listen for messages from the add-on, and send a reply window.addeventlistener("message", function(event) { event.source.postmessage("pong", event.origin) }, false); this frame script listens to change events on the "city-selector" <select> element, and sends a message to the add-on containing the value for the newly selected element.
... // city-info.js var cityselector = window.document.getelementbyid("city-selector"); cityselector.addeventlistener("change", citychanged); function citychanged() { window.parent.postmessage(cityselector.value, "*"); } to listen for these messages in the main add-on code, you can assign a listener to the frame's message event.
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Canvas code snippets - Archive of obsolete content
Archive › Add-ons › Code snippets › Canvas
function canvas2dcontext(canvas) { if (typeof canvas === 'string') { canvas = document.getelementbyid(canvas); } if (!(this instanceof canvas2dcontext)) { return new canvas2dcontext(canvas); } this.context = this.ctx = canvas.getcontext('2d'); if (!canvas2dcontext.prototype.arc) { canvas2dcontext.setup.call(this, this.ctx); } } canvas2dcontext.setup = function() { var methods = ['arc', 'arcto', 'beginpath', 'beziercurveto', 'clearrect', 'clip', 'closepath', 'drawimag...
...ods) { let method = m; canvas2dcontext.prototype[method] = function() { return this.ctx[method].apply(this.ctx, arguments); }; } for (let p of props) { let prop = p; canvas2dcontext.prototype[prop] = function(value) { if (value === undefined) return this.ctx[prop]; this.ctx[prop] = value; return this; }; } }; var canvas = document.getelementbyid('canvas'); // use context to get access to underlying context var ctx = canvas2dcontext(canvas) .strokestyle('rgb(30, 110, 210)') .transform(10, 3, 4, 5, 1, 0) .strokerect(2, 10, 15, 20) .context; // use property name as a function (but without arguments) to get the value var strokestyle = canvas2dcontext(canvas) .strokestyle('rgb(50, 110, 210)') .strokestyle(); code usable on...
...reader; var blob = yield new promise(accept => canvas.toblob(accept, type, options)); reader.readasarraybuffer(blob); yield new promise(accept => { reader.onloadend = accept }); return yield os.file.writeatomic(path, new uint8array(reader.result), { tmppath: path + '.tmp' }); }); } loading a remote page onto a canvas element the following class first creates a hidden iframe element and attaches a listener to the frame's load event.
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Forms related code snippets - Archive of obsolete content
Archive › Add-ons › Code snippets › Forms
|*| http://www.gnu.org/licenses/gpl-3.0-standalone.html |*| \*/ (function () { function datepicker (otarget) { const otable = document.createelement("table"), ohrow = document.createelement("tr"), othead = document.createelement("thead"), ocapt = document.createelement("caption"), odecryear = document.createelement("span"), oincryear = document.createelement("span"), odecrmonth = document.createelement("span"), oincrmonth = document.createelement("span"); var nid = ainstances.length, oth; this.target = otarg...
...et; this.display = document.createelement("span"); this.current = new date(); this.container = otable; this.display.classname = sprefs + "-current-month"; this.id = nid; otable.classname = sprefs + "-calendar"; otable.id = sprefs + "-cal-" + nid; odecryear.classname = sprefs + "-decrease-year"; odecrmonth.classname = sprefs + "-decrease-month"; oincrmonth.classname = sprefs + "-increase-month"; oincryear.classname = sprefs + "-increase-year"; odecryear.innerhtml = "\u00ab"; /* &laquo; */ odecrmonth.innerhtml = "\u003c"; /* &lt; */ oincrmonth.innerhtml = "\u003e"; /* &gt; */ oincryear.innerhtml = "\u00bb"; /* &raquo; */ odecryear.id = sprefs + "-decr-year-" + nid; odecrmonth.id = sprefs + "-decr-month-" + nid; oincrmonth.id = ...
...sprefs + "-incr-month-" + nid; oincryear.id = sprefs + "-incr-year-" + nid; odecryear.onmousedown = oincryear.onmousedown = odecrmonth.onmousedown = oincrmonth.onmousedown = onheadclick; for (var nthid = 0; nthid < 7; nthid++) { oth = document.createelement("th"); oth.innerhtml = sdays[nthid]; ohrow.appendchild(oth); } othead.appendchild(ohrow); ocapt.appendchild(odecryear); ocapt.appendchild(odecrmonth); ocapt.appendchild(oincryear); ocapt.appendchild(oincrmonth); ocapt.appendchild(this.display); this.container.appendchild(ocapt); this.container.appendchild(othead); this.current.setdate(1); this.writedays(); otarget.onclick = function () { if (otable.parentnode) { otable.parentnode.removechild(otable); return; ...
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Sidebar - Archive of obsolete content
Archive › Add-ons › Code snippets › Sidebar
to open a page in the "viewwebpanelssidebar" from chrome code (browser/addon/extension) such as from menuitem, it can call: openwebpanel(atitle, auri); accessing the sidebar from a browser.xul script the sidebar content is always in a document separate from the main browser document (the sidebar is actually implemented as a xul browser element).
... to access your sidebar's window or document objects, you need to use the contentwindow or contentdocument properties of document.getelementbyid("sidebar") respectively.
... for example the code below calls a function defined in the sidebar's context: var sidebarwindow = document.getelementbyid("sidebar").contentwindow; // verify that our sidebar is open at this moment: if (sidebarwindow.location.href == "chrome://yourextension/content/whatever.xul") { // call "yournotificationfunction" in the sidebar's context: sidebarwindow.yournotificationfunction(anyarguments); } testing which sidebar is open the sidebar content may contain different panels (bookmarks, history, webpanel, etc.) and sometimes one wants to only act on the sidebar when it contains a specific panel.
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Communication between HTML and your extension - Archive of obsolete content
Archive › Add-ons › Communication between HTML and your extension
in my html i have an input element in a form.
...the onreadystatechange was set to another little javascript function that would update a specific element on the html page with the result.
...some of the events only apply to certain types of elements so i included trying to modify the result of the ajax request to be of the appropriate element type (img, which supports "onload," rather than span, which doesn't, for example).
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How to convert an overlay extension to restartless - Archive of obsolete content
Archive › Add-ons › How to convert an overlay extension to restartless
figure out what xul elements you need to create for your add-on to add your interface, where it needs to go into a xul window, and how to do it.
... docs: document.getelementbyid(), document.createelement(), element reference, node reference (dom elements are also nodes).
...one to take a xul window object and then create and add your elements, and then another to find your elements and remove them from the window object.
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Adding menus and submenus - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › Adding menus and submenus
the menubar element should be a child of a toolbox element because it is treated like another toolbar on systems other than mac os x.
...the separator is usually displayed as a horizontal line that creates a logical division between different types of menuitem elements, keeping everything more organized.
... a menubar can hold one or more menu elements.
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XBL 1.0 Reference - Archive of obsolete content
Archive › Mozilla › XBL › XBL 1.0 Reference
extensible binding language is a xml-based markup language to implement reusable components (bindings) that can be bound to elements in other documents.
... the element with a binding specified, called the bound element, acquires the new behavior specified by the binding.
... bindings can be bound to elements using cascading style sheets (css) or dom.
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datasources - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › datasources
« xul reference home datasources type: space separated list of datasource uris a space-separated list of datasources that an element's template will use for content generation.
...the datasources attribute may be placed on most elements, although it will usually be found on trees and menu related elements.
... the element should have a template element as a child.
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mousethrough - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › mousethrough
« xul reference home mousethrough type: one of the values below determines whether mouse events are passed to the element or not.
... if this attribute is not specified, the value is inherited from the parent of the element.
... always mouse events are transparent to the element.
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showPopup - Archive of obsolete content
Archive › Mozilla › XUL › Method › showPopup
« xul reference home showpopup( element, x, y, popuptype, anchor, align ) deprecated since gecko 1.9 return type: no return value deprecated in favor of openpopup and openpopupatscreen opens a popup element.
... there are two ways of specifying where the popup appears, either at a specific screen position, or relative to some element in the window.
...if x and y are -1, the popup will be positioned relative to the element specified as the first argument.
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Additional Navigation - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Additional Navigation
here is an example triple that we could use in the photos example: <query> <content uri="?start"/> <member container="?start" child="?photo"/> <triple subject="?photo" predicate="http://purl.org/dc/elements/1.1/title" object="canal"/> </query> this new triple has a static value for the object attribute instead of a variable reference.
...for the first result, the value of the ?photo variable 'http://www.xulplanet.com/ndeakin/images/t/palace.jpg' will be used as the subject, the predicate will be 'http://purl.org/dc/elements/1.1/title', and the object will be 'canal'.
...another thing that you cannot have is a triple where both variables would be unknown as in the following: <query> <content uri="?start"/> <member container="?start" child="?photo"/> <triple subject="?category" predicate="http://purl.org/dc/elements/1.1/title" object="?title"/> </query> in this case when the template builder gets to the triple, neither the ?category nor the ?title variables can be filled in so the builder doesn't know what to generate.
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Bindings - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Bindings
to do this all we need to do is add the necessary data to the rdf datasource and add another <triple> element to the template's statements.
... <query> <content uri="?start"/> <member container="?start" child="?photo"/> <triple subject="?photo" predicate="http://purl.org/dc/elements/1.1/title" object="?title"/> <triple subject="?photo" predicate="http://purl.org/dc/elements/1.1/description" object="?description"/> </query> it works similarly to the previous triple.
...this is done with a binding element.
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Creating Dialogs - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Creating Dialogs
var somefile=document.getelementbyid('enterfile').value; window.opendialog("chrome://findfile/content/showdetails.xul","showmore", "chrome",somefile); in this example the dialog showdetails.xul is displayed.
... it's passed one argument, somefile, which was taken from the value of an element with the id enterfile.
...for example: var fl = window.arguments[0]; document.getelementbyid('thefile').value = fl; this is an effective way to pass values to the new window.
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Creating a Wizard - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Creating a Wizard
xul provides a wizard element which can be used to create wizards.
... the content of the wizard element includes the content of each page of the wizard.
... the pages of the wizard are created using the wizardpage element.
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Persistent Data - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Persistent Data
xul allows you to save the state of any element.
...persist attribute to allow the saving of state, you simply add a persist attribute to the element which holds a value you want to save.
... the persist attribute should be set to a space-separated list of attributes of the element that you want to save.
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Tree View Details - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Tree View Details
<window onload="init();" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <tree id="elementlist" flex="1"> <treecols> <treecol id="element" label="element" primary="true" flex="1"/> </treecols> <treechildren/> </tree> </window> we use a simple tree here with no data in the treechildren.
... function init() { document.getelementbyid("elementlist").view = treeview; } the custom tree view will need to implement a number of methods, of which the important ones will be examined individually.
... the getcelltext, iscontainer and iscontaineropen functions just return the corresponding element from the visibledata array.
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XPCOM Examples - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › XPCOM Examples
the template generates an id attribute on each menuitem element.
...that means that in order to switch the window focus, we need to do the following: determine the element that the user clicked on.
... get the value of the id attribute from the element.
...And 4 more matches
box - Archive of obsolete content
Archive › Mozilla › XUL › box
« xul reference home [ examples | attributes | properties | methods | related ] a container element which can contain any number of child elements.
... if the box has an orient attribute that is set to horizontal, the child elements are laid out from left to right in the order that they appear in the box.
... if orient is set to vertical, the child elements are laid out from top to bottom.
...And 4 more matches
column - Archive of obsolete content
Archive › Mozilla › XUL › column
« xul reference home [ examples | attributes | properties | methods | related ] a single column in a columns element.
... each child of the column element is placed in each successive cell of the grid.
... the column with the most child elements determines the number of rows in each column.
...And 4 more matches
commandset - Archive of obsolete content
Archive › Mozilla › XUL › commandset
« xul reference home [ examples | attributes | properties | methods | related ] this element is not displayed and serves as a container for command elements.
... in addition, this element can hold a command updater which is used to update commands when certain events occur.
... focus: occurs when the focused element changes.
...And 4 more matches
observes - Archive of obsolete content
Archive › Mozilla › XUL › observes
« xul reference home [ examples | attributes | properties | methods | related ] the observes element can be used to listen to a broadcaster and receive events and attributes from it.
... the observes element should be placed inside the element that wants to observe the broadcaster.
... when an observed attribute is modified on the broadcaster, the attribute's value will be forwarded and set on the parent element of the observer.
...And 4 more matches
panel - Archive of obsolete content
Archive › Mozilla › XUL › panel
noautofocus type: boolean if false, the default value, the currently focused element will be unfocused whenever the popup is opened or closed.
... position type: string the position attribute determines where the popup appears relative to the element the user clicked to invoke the popup.
...should be one of the following: autocomplete specify this for a panel that provides a tree for an autocomplete element.
...And 4 more matches
scrollbox - Archive of obsolete content
Archive › Mozilla › XUL › scrollbox
this may also be used with any other container element.
...if their container doesn't give enough room to hold them (geometrically) what happens depends on the enclosing elements; often the content is just clipped off on the bottom or right (depending on what's too big to fit).
...in our case an enclosing element also was overflow:auto.
...And 4 more matches
stringbundle - Archive of obsolete content
Archive › Mozilla › XUL › stringbundle
« xul reference home [ examples | attributes | properties | methods | related ] an element which can be used to load localized resources from property files.
... stringbundles should be placed inside a stringbundleset element.
... inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, remove...
...And 4 more matches
treerow - Archive of obsolete content
Archive › Mozilla › XUL › treerow
it should be placed inside a treeitem element.
... children of the treerow should be treecell elements.
... if child rows are necessary, they should be placed in a treechildren element inside the parent treeitem.
...And 4 more matches
triple - Archive of obsolete content
Archive › Mozilla › XUL › triple
« xul reference home [ examples | attributes | properties | methods | related ] a triple can be included inside a rule's conditions element.
...in an rdf file this would usually be an rdf description element.
... the predicate would be a child element or property.
...And 4 more matches
Theme changes in Firefox 4 - Archive of obsolete content
Archive › Themes › Theme changes in Firefox 4
controlling the actual icon size used by add-on toolbar buttons the iconsize attribute of the browser's toolbar elements now has a different default value on each toolbar independently.
... the iconsize attribute of the toolbox element in the main browser window (#navigator-toolbox) still reflects the user preference in the toolbar customization palette.
... use of the iconsize attribute on toolbar elements add-ons use the iconsize attribute to determine which icon they should display when a button is placed in a specific toolbar.
...And 4 more matches
Browser Detection and Cross Browser Support - Archive of obsolete content
Archive › Web › Browser Detection and Cross Browser Support
if (document.all) { // ie4 height = document.body.offsetheight; } else if (document.layers) { // nn4 height = window.innerheight; } else { // other height = 0; } with the introduction of the w3c dom, the standard method document.getelementbyid became available in internet explorer 5 and later in netscape 6 (gecko).
...if (document.all) { // ie4 height = document.body.offsetheight; } else if (document.layers) { // nn4 height = window.innerheight; } else if (document.getelementbyid) { // they think this is gecko // but could be wrong!
... height = window.innerheight; } else { // other height = 0; } the approach is incorrect since it assumes that the only other browser besides internet explorer 5+ that implements document.getelementbyid is gecko.
...And 4 more matches
-ms-overflow-style - Archive of obsolete content
Archive › Web › CSS › -ms-overflow-style
the -ms-overflow-style css property is a microsoft extension controlling the behavior of scrollbars when the content of an element overflows.
... initial valueautoapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values auto the initial value.
... none scrollbars are never displayed, although the element can still be scrolled if the element's content overflows.
...And 4 more matches
-ms-wrap-flow - Archive of obsolete content
Archive › Web › CSS › -ms-wrap-flow
the -ms-wrap-flow css property is a microsoft extension that specifies how exclusions impact inline content within block-level elements.
... initial valueautoapplies toblock-level elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values auto for floated elements, an exclusion is created; for all other elements, an exclusion is not created.
... remarks the -ms-wrap-flow property makes an element an exclusion element when it has a computed value other than auto.
...And 4 more matches
-ms-wrap-through - Archive of obsolete content
Archive › Web › CSS › -ms-wrap-through
the -ms-wrap-through css property is a microsoft extension that specifies how content should wrap around an exclusion element.
... initial valuewrapapplies toblock-level elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values wrap the exclusion element inherits its parent node's wrapping context.
... its descendant inline content wraps around exclusions defined outside the element.
...And 4 more matches
Back to the Server: Server-Side JavaScript On The Rise - Archive of obsolete content
Archive › Web › Server-Side JavaScript › Walkthrough
n the raw data var s = new java.io.inputstreamreader( c.getinputstream() ); var b = new java.io.bufferedreader( s ); var l, str = ""; while( ( l = b.readline() ) != null ) { // skip if( l != "" ) { str = str + l + "\n"; } } // define the namespaces, first the default, // then additional namespaces default xml namespace = "http://purl.org/rss/1.0/"; var dc = new namespace( "http://purl.org/dc/elements/1.1/" ); var rdf = new namespace( "http://www.w3.org/1999/02/22-rdf-syntax-ns#" ); // use e4x to process the feed var x = new xml( str ); for each( var i in x..item ) { print( "title: " + i.title + "\n" ); print( "about: " + i.@rdf::about + "\n" ); print( "link: " + i.link + "\n" ); print( "date: " + i.dc::date + "\n" ); } the first half of this script is standard ...
...defining these namespaces becomes important if we want to be able to access any data elements in the feed defined in these namespaces.
...notice during the processing of the item element where we use the rdf and dc namespace to access the about attribute of the item element, and the date element respectively.
...And 4 more matches
Implementation Status - Archive of obsolete content
Archive › Web › XForms › Implementation Status
supported 3.2.4 node-set binding attributes supported 3.2.5 model item property attributes partial in some cases a loop error can occur on valid bindings 302168; 3.3.1 model supported 3.3.2 instance partial instance element with two child element does not trigger exception 337302; 3.3.3 submission partial no support for @indent and complex schema validation 278761; 278762; 3.3.4 bind partial using the index() function in binds does not work.
... 4.6.7 sequence: value change with focus change supported 4.6.8 sequence: activating a trigger supported 4.6.9 sequence: submission supported 4.7 resolving id references in xforms unsupported 4.7.1 references to elements within a repeat element unsupported 4.7.2 references to elements within a bind element unsupported 4.8 dom interface for access to instance data supported 4.8.1 getinstancedocument() supported 4.8.2 rebuild() support...
...ties section title status notes bugs 6.1.1 type partial limited to types mentioned above 6.1.2 readonly supported 6.1.3 required supported 6.1.4 relevant partial relevancy applied via a bind to an element fails to apply to child attributes 342319; 6.1.5 calculate supported 6.1.6 constraint supported 6.1.7 p3ptype unsupported 279049; 6.2.1 atomic datatype partial we will support simpletype's using length, minlength, maxlength, patt...
...And 4 more matches
Fixing Table Inheritance in Quirks Mode - Archive of obsolete content
Archive › Web Standards › Fixing Table Inheritance in Quirks Mode
summary: when in quirks mode, gecko-based browsers will appear to ignore inheritance of font styles into tables from parent elements.
...if the author had set a font size on the body element, for example, the font size of text within a table would match the user's default, not the body style.
... tables and inheritance in css terms, tables are like any other element when it comes to inheritance.
...And 4 more matches
XUL Parser in Python - Archive of obsolete content
Archive › XUL Parser in Python
v.00001 to celebrate activestate's recent announcement about support for perl and python in mozilla, i have put together this little python script that parses your local xul and builds a list of all the xul elements and their attributes in an html page.
... with new widgets and attributes landing all the time, i wanted to get some quicker way of looking at the xul--at particular builds, at particular widgets, at which elements had which attributes, etc.
... the script writes out all the attributes and none of the values, but the parser itself is seeing the elements, their attributes, and the values of those attributes, and you just have to ask for them if you want them.
...And 4 more matches
Building up a basic demo with Babylon.js - Game development
Games › Techniques › 3D on the web › Building up a basic demo with Babylon.js
l structure here's the html structure we will use: <!doctype html> <html> <head> <meta charset="utf-8"> <title>mdn games: babylon.js demo</title> <style> html,body,canvas { margin: 0; padding: 0; width: 100%; height: 100%; font-size: 0; } </style> </head> <body> <script src="babylon.js"></script> <canvas id="render-canvas"></canvas> <script> var canvas = document.getelementbyid("render-canvas"); /* all our javascript code goes here */ </script> </body> </html> it contains some basic information like the document <title>, and some css to set the width and height of the <canvas> element (which babylon.js will use to render the content on) to fill the entire available viewport space.
... the first <script> element includes the babylon.js library in the page; we will write our example code in the second one.
... there is one helper variable already included, which will store a reference to the <canvas> element.
...And 4 more matches
Semantics - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Semantics
in programming, semantics refers to the meaning of a piece of code — for example "what effect does running that line of javascript have?", or "what purpose or role does that html element have" (rather than "what does it look like?".) semantics in javascript in javascript, consider a function that takes a string parameter, and returns an <li> element with that string as its textcontent.
... semantics in css in css, consider styling a list with li elements representing different types of fruits.
... semantics in html in html, for example, the <h1> element is a semantic element, which gives the text it wraps around the role (or meaning) of "a top level heading on your page." <h1>this is a top level heading</h1> by default, most browser's user agent stylesheet will style an <h1> with a large font size to make it look like a heading (although you could style it to look like anything you wanted).
...And 4 more matches
Accessible multimedia - Learn web development
Learn › Accessibility › Multimedia
multimedia and accessibility so far in this module we have looked at a variety of content and what needs to be done to ensure its accessibility, ranging from simple text content to data tables, images, native controls such as form elements and buttons, and even more complex markup structures (with wai-aria attributes).
...images, videos, <canvas> elements, flash movies, etc., aren't as easily understood by screenreaders or navigated by the keyboard, and we need to give them a helping hand.
... creating custom audio and video controls html5 video and audio share an api — html media element — which allows you to map custom functionality to buttons and other controls — both of which you define yourself.
...And 4 more matches
Advanced form styling - Learn web development
Learn › Forms › Advanced form styling
to recap what we said in the previous article, we have: the bad: some elements are more difficult to style, requiring more complex css or some more specific tricks: checkboxes and radio buttons <input type="search"> the ugly: some elements can't be styled thoroughly using css.
... these include: elements involved in creating dropdown widgets, including <select>, <option>, <optgroup> and <datalist>.
... what can be done about the "ugly" elements?
...And 4 more matches
The HTML5 input types - Learn web development
Learn › Forms › HTML5 input types
previous overview: forms next in the previous article we looked at the <input> element, covering the original values of the type attribute available since the early days of html.
...if you want more detail on browser support, you should consult our html forms element reference, and in particular our extensive <input> types reference.
...this is why we've included an <output> element — to contain the current value (we'll also look at this element in the next article).
...And 4 more matches
Web forms — Working with user data - Learn web development
Learn › Forms
the above text is a good indicator as to why we've put web forms into its own standalone module, rather than trying to mix bits of it into the html, css, and javascript topic areas — form elements are more complex than most other html elements, and they also require a close marriage of related css and javascript techniques to get the most out of them.
... introductory guides your first form the first article in our series provides your very first experience of creating a web form, including designing a simple form, implementing it using the right html elements, adding some very simple styling via css, and how data is sent to a server.
... how to structure a web form with the basics out of the way, we now look in more detail at the elements used to provide structure and meaning to the different parts of a form.
...And 4 more matches
Add a hitmap on top of an image - Learn web development
Learn › HTML › Howto › Add a hit map on top of an image
you insert your image much the same way as always (with an <img> element and alt text).
... if the image is only present as a navigation device, you may write alt="", provided you furnish appropriate alt text in the <area> elements later on.
...then assign that name (preceded by a hash) as the value for the usemap attribute: <img src="image-map.png" alt="" usemap="#example-map-1" /> step 2: activate your hotspots in this step, put all your code inside a <map> element.
...And 4 more matches
Define terms with HTML - Learn web development
Learn › HTML › Howto › Define terms with HTML
we use <dfn>, which is a special element just for marking the first occurrence of keywords.
...in other words, there's an implicit relationship between the <dfn> element and its container.
...you can use aria-describedby on any tag enclosing a keyword to be defined (not just the <dfn> element).
...And 4 more matches
Fetching data from the server - Learn web development
Learn › JavaScript › Client-side web APIs › Fetching data
just inside the <script> element, add the following code.
... this stores a reference to the <select> and <pre> elements in constants and defines an onchange event handler function so that when the select's value is changed, its value is passed to an invoked function updatedisplay() as a parameter.
...the value of the <select> element at any time is the same as the text inside the selected <option> (unless you specify a different value in a value attribute) — so for example "verse 1".
...And 4 more matches
Handling common JavaScript problems - Learn web development
Learn › Tools and testing › Cross browser testing › JavaScript
read brian birtles' animating like you just don’t care with element.animate for some really useful theory on why animation is expensive, tips on how to improve animation performance, and information on the web animations api.
...as an example, the fetch api (a modern equivalent to xmlhttprequest) uses promises to fetch resources across the network and make sure that the response has been returned before they are used (for example, displaying an image inside an <img> element).
...s geolocation or not by using something like the following: if("geolocation" in navigator) { navigator.geolocation.getcurrentposition(function(position) { // show the location on a map, perhaps using the google maps api }); } else { // give the user a choice of static maps instead perhaps } you could also write such a test for a css feature, for example by testing for the existence of element.style.property (e.g.
...And 4 more matches
Mozilla's Section 508 Compliance
Mozilla › Accessibility › Mozilla s Section 508 Compliance
(c) a well-defined on-screen indication of the current focus shall be provided that moves among interactive interface elements as the input focus changes.
... (d) sufficient information about a user interface element including the identity, operation and state of the element shall be available to assistive technology.
... when an image represents a program element, the information conveyed by the image must also be available in text.
...And 4 more matches
Creating reftest-based unit tests
Mozilla › Creating reftest-based unit tests
but the test should not fail, unless the "<blockquote>" element did not cause any indentation at all.
...for example, it occurs to me that we assume that spaces between a element name and an attribute name have no effect, but do we know this is true?
...i can create 50 or 100 test files that have spaces between the element name and the attribute of a element for a bunch of different elements, add those to the list of tests to be run, and it causes no problems for anyone.
...And 4 more matches
Listening to events on all tabs
Mozilla › Developer guide › Listening to events on all tabs
void onlocationchange( nsidomxulelement abrowser, nsiwebprogress awebprogress, nsirequest arequest, nsiuri alocation [optional] in unsigned long aflags ); parameters abrowser the browser representing the tab whose location changed.
...void onprogresschange( nsidomxulelement abrowser, nsiwebprogress awebprogress, nsirequest arequest, print32 acurselfprogress, print32 amaxselfprogress, print32 acurtotalprogress, print32 amaxtotalprogress ); parameters abrowser the browser representing the tab for which updated progress information is being provided.
...void onsecuritychange( nsidomxulelement abrowser, nsiwebprogress awebprogress, nsirequest arequest, unsigned long astate ); parameters abrowser the browser that fired the notification.
...And 4 more matches
JavaScript Tips
Mozilla › JavaScript Tips
for instance, windowmanager.getenumerator(atype).hasmoreelements() may be replaced with windowmanager.getmostrecentwindow(atype) != null for a single window.
... dom elements dom elements are just xpcom objects with some of the interfaces precached.
...similarly prefer document.getelementsbytagname(atag).item(0) != null to document.getelementsbytagname(atag).length > 0.
...And 4 more matches
source-editor.jsm
Mozilla › JavaScript code modules › source-editor.jsm
method overview initialization and destruction void destroy(); void init(element aelement, object aconfig, function acallback); search operations number find(string astring, [optional] object options); number findnext(boolean awrap); number findprevious(boolean awrap); event management void addeventlistener(string aeventtype, function acallback); void removeeventlistener(string aeventtype, function acallback); ...
... editorelement element the element containing the editor.
... when using the default orion editor, this is a xul <xul:iframe> element.
...And 4 more matches
NSS API Guidelines
Mozilla › Projects › NSS › NSS API Guidelines
accessor functions, for these data elements, should be added to the api.
... lock over single element with retry: for medium sized lists, you can secure the reference to each element, complete a test, then detect if the given element has been removed from the list.
...this method is a more complicated than the other methods: requiring the calling of search code tolerant to often repeated element inspection.
...And 4 more matches
JS_DefineConstDoubles
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS DefineConstDoubles
the last array element must contain zero-valued members.
...the last array element must contain zero-valued members.
... cds and cis are pointers to the first element of an array of jsconstdoublespec/jsconstintegerspec structures.
...And 4 more matches
JS_DefineProperties
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS DefineProperties
ps const jspropertyspec * pointer to the first element of an array containing names, ids, flags, and getproperty and setproperty method for the properties to create.
... the last array element must contain 0-valued members.
...ps is a pointer to the first element of an array of jspropertyspec structures.
...And 4 more matches
JS_NewArrayObject
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS NewArrayObject
contents js::handlevaluearray&amp; reference to the initial values for the array's elements.
... vector jsval * pointer to the initial values for the array's elements, or null.
... obsolete since jsapi 30 description js_newarrayobject with contents parameter creates a new array object with the specified contents elements.
...And 4 more matches
XUL Accessibility
Mozilla › Tech › Accessibility › XUL
introduction this article shows how xul control elements are mapped to accessibility api.
...aggregating the text from element subtree if the child node is hidden then it's ignored excepting the case when the element used as label is hidden itself if the child node is text node then its rendered value is appended if the child node is element then if it implements nsidomxullabeledcontrolelement then the value of label property is appended otherwise if it's a label element then then value attribute is appended otherwise append tooltiptext attribute append the accessible value searching specific element in neighbour of the element search inside the element subtree go up through parents (max level is 5) and search inside theirs subtrees if the element is...
... anonymous then search in whole anonymous subtree, here the attribute anonid is used instead of id attribute accessible properties this section describes common rules how accessibility properties are formed for xul elements.
...And 4 more matches
nsIBoxObject
Mozilla › Tech › XPCOM › Reference › Interface › nsIBoxObject
where possible, element.getclientrects and element.getboundingclientrect should be used instead.
...wstring propertyname); obsolete since gecko 1.9 wstring getproperty(in wstring propertyname); nsisupports getpropertyassupports(in wstring propertyname); void removeproperty(in wstring propertyname); void setproperty(in wstring propertyname, in wstring propertyvalue); void setpropertyassupports(in wstring propertyname, in nsisupports value); attributes attribute type description element nsidomelement read only.
... firstchild nsidomelement the first child of the box, in box-ordinal-group order.
...And 4 more matches
nsICacheEntryDescriptor
Mozilla › Tech › XPCOM › Reference › Interface › nsICacheEntryDescriptor
inherits from: nsicacheentryinfo last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) method overview void close(); void doom(); void doomandfailpendingrequests(in nsresult status); string getmetadataelement(in string key); void markvalid(); nsiinputstream openinputstream(in unsigned long offset); nsioutputstream openoutputstream(in unsigned long offset); void setdatasize(in unsigned long size); void setexpirationtime(in pruint32 expirationtime); void setmetadataelement(in string key, in string value); void visitmetadata(in nsicachemetadatavisitor visitor); attributes attribute type description accessgranted nscacheaccessmode get th...
... cacheelement nsisupports get or set the cache data element.
... getmetadataelement() this method retrieves the meta data.
...And 4 more matches
nsILoginManager
Mozilla › Tech › XPCOM › Reference › Interface › nsILoginManager
to create an instance, use: var loginmanager = components.classes["@mozilla.org/login-manager;1"] .getservice(components.interfaces.nsiloginmanager); method overview void addlogin(in nsilogininfo alogin); nsiautocompleteresult autocompletesearch(in astring asearchstring, in nsiautocompleteresult apreviousresult, in nsidomhtmlinputelement aelement); unsigned long countlogins(in astring ahostname, in astring aactionurl, in astring ahttprealm); boolean fillform(in nsidomhtmlformelement aform); void findlogins(out unsigned long count, in astring ahostname, in astring aactionurl, in astring ahttprealm, [retval, array, size_is(count)] out nsilogininfo logins); void getalldisabledhosts([optional] out...
... nsiautocompleteresult autocompletesearch( in astring asearchstring, in nsiautocompleteresult apreviousresult, in nsidomhtmlinputelement aelement ); parameters asearchstring missing description apreviousresult missing description aelement missing description return value missing description countlogins() returns the number of logins matching the specified criteria.
... boolean fillform( in nsidomhtmlformelement aform ); parameters aform the htmlform to attempt to fill out.
...And 4 more matches
nsIScriptableUnescapeHTML
Mozilla › Tech › XPCOM › Reference › Interface › nsIScriptableUnescapeHTML
implemented by: @mozilla.org/feed-unescapehtml;1 as a service: var scriptableunescapehtml = components.classes["@mozilla.org/feed-unescapehtml;1"] .getservice(components.interfaces.nsiscriptableunescapehtml); method overview nsidomdocumentfragment parsefragment(in astring fragment, in prbool isxml, in nsiuri baseuri, in nsidomelement element); astring unescape(in astring src); methods parsefragment() parses a string of html or xml source into a sanitized documentfragment.
... this is equivalent to calling nsiparserutils::parsefragment(fragment, 0, isxml, baseuri, element).
... nsidomdocumentfragment parsefragment( in astring fragment, in prbool isxml, in nsiuri baseuri, in nsidomelement element ); parameters fragment a string of html or xml source to parse as a fragment.
...And 4 more matches
nsISupportsArray
Mozilla › Tech › XPCOM › Reference › Interface › nsISupportsArray
inherits from: nsicollection last changed in gecko 1.7 method overview boolean appendelements(in nsisupportsarray aelements); violates the xpcom interface guidelines nsisupportsarray clone(); void compact(); void deleteelementat(in unsigned long aindex); void deletelastelement(in nsisupports aelement); nsisupports elementat(in unsigned long aindex); violates the xpcom interface guidelines boolean enumeratebackwards(in nsisupportsarrayenumfunc afunc, in voidptr adata); violates the xpcom interface guidelines boolean enumerateforwards(in nsisupportsarrayenumfunc afunc, in voidptr adata); violates the xpcom interface guidelines boolean equals([const] in nsisupportsarray other); violates t...
...he xpcom interface guidelines long getindexof(in nsisupports apossibleelement); long getindexofstartingat(in nsisupports apossibleelement, in unsigned long astartindex); long getlastindexof(in nsisupports apossibleelement); long indexof([const] in nsisupports apossibleelement); violates the xpcom interface guidelines long indexofstartingat([const] in nsisupports apossibleelement, in unsigned long astartindex); violates the xpcom interface guidelines boolean insertelementat(in nsisupports aelement, in unsigned long aindex); violates the xpcom interface guidelines boolean insertelementsat(in nsisupportsarray aother, in unsigned long aindex); violates the xpcom interface guidelines long lastindexof([const] in nsisupports apossibleelement); violates the xpcom interface guidelines bo...
...olean moveelement(in long afrom, in long ato); violates the xpcom interface guidelines boolean removeelementat(in unsigned long aindex); violates the xpcom interface guidelines boolean removeelementsat(in unsigned long aindex, in unsigned long acount); violates the xpcom interface guidelines boolean removelastelement([const] in nsisupports aelement); violates the xpcom interface guidelines boolean replaceelementat(in nsisupports aelement, in unsigned long aindex); violates the xpcom interface guidelines boolean sizeto(in long asize); violates the xpcom interface guidelines methods violates the xpcom interface guidelines appendelements() boolean appendelements( in nsisupportsarray aelements ); parameters aelements return value clone() nsisupportsarray clone(); parameters...
...And 4 more matches
nsITreeView
Mozilla › Tech › XPCOM › Reference › Interface › nsITreeView
each property, x, that the view gives back will cause the css ::moz-tree-cell-*(x) pseudoelement to be matched on the treechildren element.
...each property, x, that the view gives back will cause the css ::moz-tree-column(x) to be matched on the treechildren element.
...if the empty string is returned, the ::moz-tree-image pseudoelement will be used.
...And 4 more matches
WebIDL bindings
Mozilla › WebIDL bindings
any dictionary members and sequence elements become js::value.
... the dictionary members and sequence elements are guaranteed to be marked by whomever puts the sequence or dictionary on the stack, using sequencerooter and dictionaryrooter.
... object dictionary members and sequence elements become jsobject*.
...And 4 more matches
Working with data
Mozilla › js-ctypes › Using js-ctypes › Working with data
this is the same as new arraytype(type.elementtype, value).
... example: creating an array of strings var cstr1 = ctypes.jschar.array()('rawr'); var cstr2 = ctypes.jschar.array()('boo'); var mycarray_ofstrings = ctypes.jschar.ptr.array(2)([cstr1, cstr2]); // specifying length of 2 is optional, can omit it, so can just do `ctypes.jschar.ptr.array()([cstr1, cstr2])` mycarray_ofstrings.addressofelement(0).contents.readstring(); // outputs: "rawr" mycarray_ofstrings.addressofelement(1).contents.readstring(); // outputs: "boo" example: creating an array of integers var jsarr = [4, 10]; var mycarr = ctypes.int.array(jsarr.length)(jsarr); // specifying length is optional, can omit.
... this will also work: `ctypes.int.array()(jsarr)` mycarr.addressofelement(0).contents; // outputs: 4 mycarr.addressofelement(1).contents; // outputs: 10 type casting you can type cast data from one type to another by using the ctypes.cast() function: var newobj = ctypes.cast(origobj, newtype); this will return a new object whose data block is shared with the original object, but whose type is newtype.
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CSS Grid Inspector: Examine grid layouts - Firefox Developer Tools
Tools › Page Inspector › How to › Examine grid layouts
discovering css grids when an html element on your page has display: grid applied to it, a number of features are made available in the devtools to provide easy access to grid features.
... in the html pane in the html pane, elements laid out using a grid have a "grid" marker beside them.
... clicking the icon toggles the display of a grid overlay on the page, which appears over the element, laid out like a grid to show the position of its grid lines and tracks: the overlay is still shown when you select other elements, so you can edit related css properties and see how the grid is affected.
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Waterfall - Firefox Developer Tools
Tools › Performance › Waterfall
recalculate style calculating the computed styles that apply to page elements.
...the hint may be any of: self subtree latersiblings csstransitions cssanimations svgattranimations styleattribute styleattribute_animations force forcedescendants layout calculating the position and size of page elements.
... recalculate style: if the browser thinks the computed styles for page elements have changed, it must then recalculate them.
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CanvasRenderingContext2D.drawImage() - Web APIs
Web › API › CanvasRenderingContext2D › drawImage
syntax void ctx.drawimage(image, dx, dy); void ctx.drawimage(image, dx, dy, dwidth, dheight); void ctx.drawimage(image, sx, sy, swidth, sheight, dx, dy, dwidth, dheight); parameters image an element to draw into the context.
... the specification permits any canvas image source (canvasimagesource), specifically, a cssimagevalue, an htmlimageelement, an svgimageelement, an htmlvideoelement, an htmlcanvaselement, an imagebitmap, or an offscreencanvas.
... type_mismatch_err the specified source element isn't supported.
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CanvasRenderingContext2D - Web APIs
Web › API › CanvasRenderingContext2D
the canvasrenderingcontext2d interface, part of the canvas api, provides the 2d rendering context for the drawing surface of a <canvas> element.
... basic example to get a canvasrenderingcontext2d instance, you must first have an html <canvas> element to work with: <canvas id="my-house" width="300" height="300"></canvas> to get the canvas' 2d rendering context, call getcontext() on the <canvas> element, supplying '2d' as the argument: const canvas = document.getelementbyid('my-house'); const ctx = canvas.getcontext('2d'); with the context in hand, you can draw anything you like.
... canvasrenderingcontext2d.drawfocusifneeded() if a given element is focused, this method draws a focus ring around the current path.
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Manipulating video using canvas - Web APIs
Web › API › Canvas API › Manipulating video using canvas
by combining the capabilities of the video element with a canvas, you can manipulate video data in real time to incorporate a variety of visual effects to the video being displayed.
...div> <video id="video" src="media/video.mp4" controls="true" crossorigin="anonymous"/> </div> <div> <canvas id="c1" width="160" height="96"></canvas> <canvas id="c2" width="160" height="96"></canvas> </div> <script type="text/javascript" src="processor.js"></script> </body> </html> the key bits to take away from this are: this document establishes two canvas elements, with the ids c1 and c2.
... var processor; processor.doload = function doload() { this.video = document.getelementbyid('video'); this.c1 = document.getelementbyid('c1'); this.ctx1 = this.c1.getcontext('2d'); this.c2 = document.getelementbyid('c2'); this.ctx2 = this.c2.getcontext('2d'); let self = this; this.video.addeventlistener('play', function() { self.width = self.video.videowidth / 2; self.height = self.video.videoheight / 2; self.timercallback(); }, ...
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Hit regions and accessibility - Web APIs
Web › API › Canvas API › Tutorial › Hit regions and accessibility
« previousnext » the <canvas> element on its own is just a bitmap and does not provide information about any drawn objects.
...you can use aria attributes to describe the behavior and purpose of the canvas element.
...it allows you to make hit detection easier and lets you route events to dom elements.
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Event - Web APIs
Web › API › Event
it can also be triggered programmatically, such as by calling the htmlelement.click() method of an element, or by defining the event, then sending it to a specified target using eventtarget.dispatchevent().
... many dom elements can be set up to accept (or "listen" for) these events, and execute code in response to process (or "handle") them.
... event-handlers are usually connected (or "attached") to various html elements (such as <button>, <div>, <span>, etc.) using eventtarget.addeventlistener(), and this generally replaces using the old html event handler attributes.
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FileList - Web APIs
Web › API › FileList
an object of this type is returned by the files property of the html <input> element; this lets you access the list of files selected with the <input type="file"> element.
... note: prior to gecko 1.9.2, the input element only supported a single file being selected at a time, meaning that the filelist would contain only one file.
... starting with gecko 1.9.2, if the input element's multiple attribute is true, the filelist may contain multiple files.
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Option() - Web APIs
Web › API › HTMLOptionElement › Option
the option() constructor creates a new htmloptionelement.
... syntax var optionelementreference = new option(text, value, defaultselected, selected); parameters text optional a domstring representing the content of the element, i.e.
... value optional a domstring representing the value of the htmloptionelement, i.e.
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IntersectionObserver.observe() - Web APIs
Web › API › IntersectionObserver › observe
the intersectionobserver method observe() adds an element to the set of target elements being watched by the intersectionobserver.
... one observer has one set of thresholds and one root, but can watch multiple target elements for visibility changes in keeping with those.
... to stop observing the element, call intersectionobserver.unobserve().
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IntersectionObserver - Web APIs
Web › API › IntersectionObserver
the intersectionobserver interface of the intersection observer api provides a way to asynchronously observe changes in the intersection of a target element with an ancestor element or with a top-level document's viewport.
... the ancestor element or viewport is referred to as the root.
...the configuration cannot be changed once the intersectionobserver is created, so a given observer object is only useful for watching for specific changes in degree of visibility; however, you can watch multiple target elements with the same observer.
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ParentNode.querySelector() - Web APIs
Web › API › ParentNode › querySelector
the parentnode mixin defines the queryselector() method as returning an element representing the first element matching the specified group of selectors which are descendants of the object on which the method was called.
... if you need all the elements matching the selector list, use queryselectorall() instead.
... note: this method is implemented as document.queryselector(), documentfragment.queryselector() and element.queryselector().
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PointerEvent - Web APIs
Web › API › PointerEvent
a pointer's hit test is the process a browser uses to determine the target element for a pointer event.
... typically, this is determined by considering the pointer's location and also the visual layout of elements in a document on screen media.
... pointerover this event is fired when a pointing device is moved into an element's hit test boundaries.
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getBBox() - Web APIs
Web › API › SVGGraphicsElement › getBBox
the svggraphicselement.getbbox() allows us to determine the coordinates of the smallest rectangle in which the object fits.
... the coordinates returned are with respect to the current svg space (after the application of all geometry attributes on all the elements contained in the target element).
... note: getbbox() must return the actual bounding box at the time the method was called—even in case the element has not yet been rendered.
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Selection - Web APIs
Web › API › Selection
if anchornode is an element, this is the number of child nodes of the anchornode preceding the anchor.
...if focusnode is an element, this is the number of child nodes of the focusnode preceding the focus.
... selection and input focus selection and input focus (indicated by document.activeelement) have a complex relationship that varies by browser.
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Multi-touch interaction - Web APIs
Web › API › Touch events › Multi-touch interaction
define touch targets the application uses <div> elements to represent four touch areas.
... function set_handlers(name) { // install event handlers for the given element var el=document.getelementbyid(name); el.ontouchstart = start_handler; el.ontouchmove = move_handler; // use same handler for touchcancel and touchend el.ontouchcancel = end_handler; el.ontouchend = end_handler; } function init() { set_handlers("target1"); set_handlers("target2"); set_handlers("target3"); set_handlers("target4"); } move/pinch/zoom handler this function provides very...
... // // this function sets the target element's border to "dashed" to visually // indicate the target received a move event.
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WebGL2RenderingContext - Web APIs
Web › API › WebGL2RenderingContext
the webgl2renderingcontext interface provides the opengl es 3.0 rendering context for the drawing surface of an html <canvas> element.
... to get an object of this interface, call getcontext() on a <canvas> element, supplying "webgl2" as the argument: var canvas = document.getelementbyid('mycanvas'); var gl = canvas.getcontext('webgl2'); webgl 2 is an extension to webgl 1.
... drawing buffers webgl2renderingcontext.vertexattribdivisor() modifies the rate at which generic vertex attributes advance when rendering multiple instances of primitives with gl.drawarraysinstanced() and gl.drawelementsinstanced().
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Keyframe Formats - Web APIs
Web › API › Web Animations API › Keyframe Formats
element.animate(), keyframeeffect.keyframeeffect(), and keyframeeffect.setkeyframes() all accept objects formatted to represent a set of keyframes.
... element.animate([ { // from opacity: 0, color: "#fff" }, { // to opacity: 1, ​ color: "#000" } ], 2000); offsets for each keyframe can be specified by providing an offset value.
... element.animate([ { opacity: 1 }, { opacity: 0.1, offset: 0.7 }, { opacity: 0 } ], 2000); note: offset values, if provided, must be between 0.0 and 1.0 (inclusive) and arranged in ascending order.
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Web Animations API - Web APIs
Web › API › Web Animations API
animation of dom elements.
... concepts and usage the web animations api provides a common language for browsers and developers to describe animations on dom elements.
... effecttiming element.animate(), keyframeeffectreadonly.keyframeeffectreadonly(), and keyframeeffect.keyframeeffect() all accept an optional dictionary object of timing properties.
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Using Web Workers - Web APIs
Web › API › Web Workers API › Using web workers
when you want to send a message to the worker, you post messages to it like this (main.js): first.onchange = function() { myworker.postmessage([first.value,second.value]); console.log('message posted to worker'); } second.onchange = function() { myworker.postmessage([first.value,second.value]); console.log('message posted to worker'); } so here we have two <input> elements represented by the variables first and second; when the value of either is changed, myworker.postmessage([first.value,second.value]) is used to send the value inside both to the worker, as an array.
... listeners[event.data.querymethodlistener].apply(instance, event.data.querymethodarguments); } else { this.defaultlistener.call(instance, event.data); } } } // your custom "queryable" worker var mytask = new queryableworker('my_task.js'); // your custom "listeners" mytask.addlistener('printstuff', function (result) { document.getelementbyid('firstlink').parentnode.appendchild(document.createtextnode('the difference is ' + result + '!')); }); mytask.addlistener('doalert', function (time, unit) { alert('worker waited for ' + time + ' ' + unit + ' :-)'); }); </script> </head> <body> <ul> <li><a id="firstlink" href="javascript:mytask.sendquery('getdifference', 5, 3);">what is the difference between 5 and 3?<...
... embedded workers there is not an "official" way to embed the code of a worker within a web page, like <script> elements do for normal scripts.
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WindowOrWorkerGlobalScope.setInterval() - Web APIs
Web › API › WindowOrWorkerGlobalScope › setInterval
<!doctype html> <html> <head> <meta charset="utf-8" /> <title>setinterval/clearinterval example</title> <script> var nintervid; function changecolor() { nintervid = setinterval(flashtext, 1000); } function flashtext() { var oelem = document.getelementbyid('my_box'); oelem.style.color = oelem.style.color == 'red' ?
...amap = []; this.rate = nrate || 100; this.play = function () { if (btyping) { return; } if (bstart) { var aitems = document.queryselectorall(sselector); if (aitems.length === 0) { return; } for (var nitem = 0; nitem < aitems.length; nitem++) { asheets.push(new sheet(aitems[nitem])); /* uncomment the following line if you have previously hidden your elements via css: */ // aitems[nitem].style.visibility = "visible"; } bstart = false; } nintervid = setinterval(typewrite, this.rate); btyping = true; }; this.pause = function () { clearinterval(nintervid); btyping = false; }; this.terminate = function () { ocurrent.nodevalue += spart; spart = ""; for (nidx; nidx < asheets.length; scroll(ash...
...eets[nidx++], 0, false)); clean(); }; } /* usage: */ var otwexample1 = new typewriter(/* elements: */ '#article, h1, #info, #copyleft', /* frame rate (optional): */ 15); /* default frame rate is 100: */ var otwexample2 = new typewriter('#controls'); /* you can also change the frame rate value modifying the "rate" property; for example: */ // otwexample2.rate = 150; onload = function () { otwexample1.play(); otwexample2.play(); }; </script> <style type="text/css"> span.intlink, a, a:visited { cursor: pointer; color: #000000; text-decoration: underline; } #info { width: 180px; height: 150px; float: right; background-color: #eeeeff; padding: 4px; overflow: auto; font-size: 12px; margin: 4px; border-radius: 5px; /* visibility: hidden; */ } </style> </head> <b...
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Generating HTML - Web APIs
Web › API › XSLTProcessor › Generating HTML
the <body> element of the article now contains html elements (a <b> and <u> tag, see figure 2).
... the xml document contains both html elements and xml elements, but only one namespace is needed, namely for the xml elements.
...for the xml elements, our own namespace is needed, http://devedge.netscape.com/2002/de, and it is given the prefix myns (xmlns:myns="http://devedge.netscape.com/2002/de").
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ARIA: List role - Accessibility
Web › Accessibility › ARIA › Roles › List role
<section role="list"> <div role="listitem">list item 1</div> <div role="listitem">list item 2</div> <div role="listitem">list item 3</div> </section> description any content that consists of an outer container with a list of elements inside it can be identified to assistive technologies using the list and listitem containers respectively.
... there are no hard and fast rules about which elements you should use to markup the list and list items, but you should make sure that the list items make sense in the context of a list, e.g.
... warning: if at all possible in your work, you should use the appropriate semantic html elements to mark up a list and its listitems — <ul>/<ol> and <li>.
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Cognitive accessibility - Accessibility
Web › Accessibility › Cognitive accessibility
cognitive impairments includes: delivering content in more than one way, such as by text-to-speech or by video; providing easily-understood content, such as text written using plain-language standards; focusing attention on important content; minimizing distractions, such as unnecessary content or advertisements; providing consistent web page layout and navigation; incorporating familiar elements, such as underlined links that are blue when not visited and purple when visited; dividing processes into logical, essential steps with progress indicators; making website authentication as easy as possible without compromising security; and making forms easy to complete, such as with clear error messages and simple error recovery.
... focus order makes sense the order of focus for interactive elements should make sense.
... focused elements should be visibly focused when a user navigates using a keyboard, the ui should make it obvious which element currently has focus.
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-moz-user-input - CSS: Cascading Style Sheets
Web › CSS › -moz-user-input
in mozilla applications, -moz-user-input determines if an element will accept user input.
... /* keyword values */ -moz-user-input: none; -moz-user-input: enabled; -moz-user-input: disabled; /* global values */ -moz-user-input: inherit; -moz-user-input: initial; -moz-user-input: unset; for elements that normally take user input, such as a <textarea>, the initial value of -moz-user-input is enabled.
... syntax values none the element does not respond to user input, and it does not become :active.
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::backdrop - CSS: Cascading Style Sheets
Web › CSS › ::backdrop
the ::backdrop css pseudo-element is a box the size of the viewport which is rendered immediately beneath any element being presented in full-screen mode.
... this includes both elements which have been placed in full-screen mode using the fullscreen api and <dialog> elements.
... when multiple elements have been placed into full-screen mode, the backdrop is drawn immediately beneath the frontmost such element, and on top of the older full-screen elements.
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:checked - CSS: Cascading Style Sheets
Web › CSS › :checked
the :checked css pseudo-class selector represents any radio (<input type="radio">), checkbox (<input type="checkbox">), or option (<option> in a <select>) element that is checked or toggled to an on state.
... /* matches any checked/selected radio, checkbox, or option */ :checked { margin-left: 25px; border: 1px solid blue; } the user can engage this state by checking/selecting an element, or disengage it by unchecking/deselecting the element.
... note: because browsers often treat <option>s as replaced elements, the extent to which they can be styled with the :checked pseudo-class varies from browser to browser.
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@namespace - CSS: Cascading Style Sheets
Web › CSS › @namespace
syntax /* default namespace */ @namespace url(xml-namespace-url); @namespace "xml-namespace-url"; /* prefixed namespace */ @namespace prefix url(xml-namespace-url); @namespace prefix "xml-namespace-url"; description the defined namespaces can be used to restrict the universal, type, and attribute selectors to only select elements within that namespace.
...when a default namespace is defined, all universal and type selectors (but not attribute selectors, see note below) apply only to elements in that namespace.
...when a universal, type, or attribute selector is prefixed with a namespace prefix, then that selector only matches if the namespace and name of the element or attribute matches.
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Introduction to the CSS basic box model - CSS: Cascading Style Sheets
Web › CSS › CSS Box Model › Introduction to the CSS box model
when laying out a document, the browser's rendering engine represents each element as a rectangular box according to the standard css basic box model.
... the content area, bounded by the content edge, contains the "real" content of the element, such as text, an image, or a video player.
... if the box-sizing property is set to content-box (default) and if the element is a block element, the content area's size can be explicitly defined with the width, min-width, max-width, height, min-height, and max-height properties.
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Realizing common layouts using CSS Grid Layout - CSS: Cascading Style Sheets
Web › CSS › CSS Grid Layout › Realizing common layouts using CSS Grid Layout
my mark-up is a container with elements inside for a header, footer, main content, navigation, sidebar, and a block into which i am intending to place advertising.
...i find this named areas method very helpful at a prototyping stage, it is easy to play around with the location of elements.
... .wrapper { max-width: 1024px; margin: 0 auto; font: 1.2em helvetica, arial, sans-serif; } .wrapper > * { border: 2px solid #f08c00; background-color: #ffec99; border-radius: 5px; padding: 10px; } .wrapper { display: grid; grid-template-columns: repeat(12, [col-start] 1fr); grid-gap: 20px; } to demonstrate how this grid system works i have four child elements inside my wrapper.
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Using CSS custom properties (variables) - CSS: Cascading Style Sheets
Web › CSS › Using CSS custom properties
like any other property, this is written inside a ruleset, like so: element { --main-bg-color: brown; } note that the selector given to the ruleset defines the scope that the custom property can be used in.
... as mentioned earlier, you use the custom property value by specifying your custom property name inside the var() function, in place of a regular property value: element { background-color: var(--main-bg-color); } first steps with custom properties let's start with this simple css that applies the same color to elements of different classes: .one { color: white; background-color: brown; margin: 10px; width: 50px; height: 50px; display: inline-block; } .two { color: white; background-color: black; margin: 10px; width: 150px; height: 7...
...this means that if no value is set for a custom property on a given element, the value of its parent is used.
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background-clip - CSS: Cascading Style Sheets
Web › CSS › background-clip
the background-clip css property sets whether an element's background extends underneath its border box, padding box, or content box.
... if the element has no background-image or background-color, this property will only have a visual effect when the border has transparent regions or partially opaque regions (due to border-style or border-image); otherwise, the border masks the difference.
... note: because the root element has a different background painting area, the background-clip property has no effect when specified on it.
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clip-path - CSS: Cascading Style Sheets
Web › CSS › clip-path
the clip-path css property creates a clipping region that sets what part of an element should be shown.
... values <clip-source> a <url> referencing an svg <clippath> element.
...if a viewbox attribute is specified for the element creating the svg viewport, the reference box is positioned at the origin of the coordinate system established by the viewbox attribute and the dimension of the size of the reference box is set to the width and height values of the viewbox attribute.
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column-span - CSS: Cascading Style Sheets
Web › CSS › column-span
the column-span css property makes it possible for an element to span across all columns when its value is set to all.
... /* keyword values */ column-span: none; column-span: all; /* global values */ column-span: inherit; column-span: initial; column-span: unset; an element that spans more than one column is called a spanning element.
... values none the element does not span multiple columns.
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filter - CSS: Cascading Style Sheets
Web › CSS › filter
the filter css property applies graphical effects like blur or color shift to an element.
...you can also reference an svg filter with a url to an svg filter element.
...-rotate(90deg); filter: invert(75%); filter: opacity(25%); filter: saturate(30%); filter: sepia(60%); /* multiple filters */ filter: contrast(175%) brightness(3%); /* use no filter */ filter: none; /* global values */ filter: inherit; filter: initial; filter: unset; with a function, use the following: filter: <filter-function> [<filter-function>]* | none for a reference to an svg <filter> element, use the following: filter: url(file.svg#filter-element-id) interpolation if both the beginning and end filters have a function list of the same length without <url>, each of their filter functions is interpolated according to its specific rules.
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font - CSS: Cascading Style Sheets
Web › CSS › font
the font css shorthand property sets all the different properties of an element's font.
... alternatively, it sets an element's font to a system font.
... formal definition initial valueas each of the properties of the shorthand:font-style: normalfont-variant: normalfont-weight: normalfont-stretch: normalfont-size: mediumline-height: normalfont-family: depends on user agentapplies toall elements.
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height - CSS: Cascading Style Sheets
Web › CSS › height
the height css property specifies the height of an element.
... auto the browser will calculate and select a height for the specified element.
... accessibility concerns ensure that elements set with a height are not truncated and/or do not obscure other content when the page is zoomed to increase text size.
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mask - CSS: Cascading Style Sheets
Web › CSS › mask
the mask css shorthand property hides an element (partially or fully) by masking or clipping the image at specific points.
... constituent properties this property is a shorthand for the following css properties: mask-clip mask-composite mask-image mask-mode mask-origin mask-position mask-repeat mask-size syntax /* keyword values */ mask: none; /* image values */ mask: url(mask.png); /* pixel image used as mask */ mask: url(masks.svg#star); /* element within svg graphic used as mask */ /* combined values */ mask: url(masks.svg#star) luminance; /* element within svg graphic used as luminance mask */ mask: url(masks.svg#star) 40px 20px; /* element within svg graphic used as mask positioned 40px from the top and 20px from the left */ mask: url(masks.svg#star) 0 0/50px 50px; /* element within svg graphic used as mask with a width an...
...d height of 50px */ mask: url(masks.svg#star) repeat-x; /* element within svg graphic used as horizontally repeated mask */ mask: url(masks.svg#star) stroke-box; /* element within svg graphic used as mask extending to the box enclosed by the stroke */ mask: url(masks.svg#star) exclude; /* element within svg graphic used as mask and combined with background using non-overlapping parts */ /* global values */ mask: inherit; mask: initial; mask: unset; /* multiple masks */ mask: url(masks.svg#star) left / 16px repeat-y, /* element within svg graphic is used as a mask on the left-hand side with a width of 16px */ url(masks.svg#circle) right / 16px repeat-y; /* element within svg graphic is used as a mask on the right-hand side with a width of 16px */ values <mask-re...
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max-height - CSS: Cascading Style Sheets
Web › CSS › max-height
the max-height css property sets the maximum height of an element.
... auto the browser will calculate and select a max-height for the specified element.
... accessibility concerns ensure that elements set with a max-height are not truncated and/or do not obscure other content when the page is zoomed to increase text size.
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max-width - CSS: Cascading Style Sheets
Web › CSS › max-width
the max-width css property sets the maximum width of an element.
... auto the browser will calculate and select a max-width for the specified element.
... accessibility concerns ensure that elements set with a max-width are not truncated and/or do not obscure other content when the page is zoomed to increase text size.
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min-width - CSS: Cascading Style Sheets
Web › CSS › min-width
the min-width css property sets the minimum width of an element.
... the element's width is set to the value of min-width whenever min-width is larger than max-width or width.
... auto the browser will calculate and select a min-width for the specified element.
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object-fit - CSS: Cascading Style Sheets
Web › CSS › object-fit
the object-fit css property sets how the content of a replaced element, such as an <img> or <video>, should be resized to fit its container.
... you can alter the alignment of the replaced element's content object within the element's box using the object-position property.
... values contain the replaced content is scaled to maintain its aspect ratio while fitting within the element’s content box.
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overflow - CSS: Cascading Style Sheets
Web › CSS › overflow
the overflow css shorthand property sets the desired behavior for an element's overflow — i.e.
... when an element's content is too big to fit in its block formatting context — in both directions.
...the content can be scrolled programmatically (for example, by setting the value of a property such as offsetleft), so the element is still a scroll container.
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perspective - CSS: Cascading Style Sheets
Web › CSS › perspective
the perspective css property determines the distance between the z=0 plane and the user in order to give a 3d-positioned element some perspective.
...it is used to apply a perspective transform to the element and its content.
... description each 3d element with z>0 becomes larger; each 3d-element with z<0 becomes smaller.
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text-justify - CSS: Cascading Style Sheets
Web › CSS › text-justify
the text-justify css property sets what type of justification should be applied to text when text-align: justify; is set on an element.
... formal definition initial valueautoapplies toinline-level and table-cell elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax auto | inter-character | inter-word | none examples <p class="none"><code>text-justify: none</code> —<br>lorem ipsum dolor sit amet, consectetur adipiscing elit.
...cras eu elementum dui.</p> <p class="auto"><code>text-justify: auto</code> —<br>lorem ipsum dolor sit amet, consectetur adipiscing elit.
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translateZ() - CSS: Cascading Style Sheets
Web › CSS › transform-function › translateZ
the translatez() css function repositions an element along the z-axis in 3d space, i.e., closer to or farther away from the viewer.
... this transformation is defined by a <length> which specifies how far inward or outward the element or elements move.
...a positive value moves the element towards the viewer, and a negative value farther away.
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HTML attribute: multiple - HTML: Hypertext Markup Language
Web › HTML › Attributes › multiple
the multiple attribute on the <select> element represents a control for selecting zero or more options from the list of options.
... otherwise, the <select> element represents a control for selecting a single <option> from the list of options.
...see the <form> element and sending form data for more information.
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<input type="checkbox"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › checkbox
<input> elements of type checkbox are rendered by default as boxes that are checked (ticked) when activated, like you might see in an official government paper form.
... additional attributes in addition to the common attributes shared by all <input> elements, "checkbox" inputs support the following attributes: attribute description checked boolean; if present, the checkbox is toggled on by default indeterminate a boolean which, if present, indicates that the value of the checkbox is indeterminate rather than true or false value the string to use as the value of the checkbox when submitting the for...
...(only the htmlinputelement’s checked idl attribute is updated.) note: unlike other input controls, a checkboxes value is only included in the submitted data if the checkbox is currently checked.
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<input type="radio"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › radio
<input> elements of type radio are generally used in radio groups—collections of radio buttons describing a set of related options.
...they each also have a unique id, which is used by the <label> element's for attribute to associate the labels with the radio buttons.
... additional attributes in addition to the common attributes shared by all <input> elements, radio inputs support the following attributes: attribute description checked a boolean indicating whether or not this radio button is the currently-selected item in the group value the string to use as the value of the radio when submitting the form, if the radio is currently toggled on checked a boolean attribute which, if present, indicates tha...
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<ins> - HTML: Hypertext Markup Language
Web › HTML › Element › ins
the html <ins> element represents a range of text that has been added to a document.
... you can use the <del> element to similarly represent a range of text that has been deleted from the document.
... permitted parents any element that accepts phrasing content.
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<li> - HTML: Hypertext Markup Language
Web › HTML › Element › li
the html <li> element is used to represent an item in a list.
... it must be contained in a parent element: an ordered list (<ol>), an unordered list (<ul>), or a menu (<menu>).
... tag omission the end tag can be omitted if the list item is immediately followed by another <li> element, or if there is no more content in its parent element.
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<optgroup> - HTML: Hypertext Markup Language
Web › HTML › Element › optgroup
the html <optgroup> element creates a grouping of options within a <select> element.
... permitted content zero or more <option> elements.
...the end tag is optional if this element is immediately followed by another <optgroup> element, or if the parent element has no more content.
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<span> - HTML: Hypertext Markup Language
Web › HTML › Element › span
the html <span> element is a generic inline container for phrasing content, which does not inherently represent anything.
... it can be used to group elements for styling purposes (using the class or id attributes), or because they share attribute values, such as lang.
... it should be used only when no other semantic element is appropriate.
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<xmp> - HTML: Hypertext Markup Language
Web › HTML › Element › xmp
summary the html example element (<xmp>) renders text between the start and end tags without interpreting the html in between and using a monospaced font.
... note: do not use this element.
... use the <pre> element or, if semantically adequate, the <code> element instead.
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JavaScript technologies overview - JavaScript
Web › JavaScript › JavaScript technologies overview
however, the umbrella term "javascript" as understood in a web browser context contains several very different elements.
...among the things defined by the dom, we can find: the document structure, a tree model, and the dom event architecture in dom core: node, element, documentfragment, document, domimplementation, event, eventtarget, … a less rigorous definition of the dom event architecture, as well as specific events in dom events.
...layered above the abstract concepts defined in dom core, html also defines the meaning of elements.
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TypeError: Reduce of empty array with no initial value - JavaScript
Web › JavaScript › Reference › Errors › Reduce of empty array with no initial value
however, if no initial value is provided, it will use the first element of the array or typedarray as the initial value.
... examples invalid cases this problem appears frequently when combined with a filter (array.prototype.filter(), typedarray.prototype.filter()) which will remove all elements of the list.
... var ints = [0, -1, -2, -3, -4, -5]; ints.filter(x => x > 0) // removes all elements .reduce((x, y) => x + y) // no more elements to use for the initial value.
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Array.prototype.shift() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › shift
the shift() method removes the first element from an array and returns that removed element.
... syntax arr.shift() return value the removed element from the array; undefined if the array is empty.
... description the shift method removes the element at the zeroeth index and shifts the values at consecutive indexes down, then returns the removed value.
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Array.prototype.slice() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › slice
slice(-2) extracts the last two elements in the sequence.
...for example, slice(1,4) extracts the second element through the fourth element (elements indexed 1, 2, and 3).
...slice(2,-1) extracts the third element through the second-to-last element in the sequence.
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<semantics> - MathML
Web › MathML › Element › semantics
the mathml elements <semantics>, <annotation> and <annotation-xml> are used to combine presentation and content markup and to provide both, layout information and semantic meaning of mathematical expressions.
... the <semantics> element acts as a container element associating annotations and must have child elements (it will raise an invalid markup error otherwise).
... the <annotation> element is the container element containing semantic information in a non-xml format, whereas the <annotation-xml> element contains content in an xml format, e.g.
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Image file type and format guide - Web media technologies
Web › Media › Formats › Image types
additionally, their use for favicons has subsided in favor of using a png file and the <link> element, as described in providing icons for different usage contexts in <link>: the external resource link element.
...as such, svg is popular for user interface elements in modern web design.
...for instance, this example defines an drawing area with initial size 100 by 100 units, containing a line drawn diagonally through the box: <svg viewbox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"> <line x1="0" y1="80" x2="100" y2="20" stroke="black" /> </svg> svg can be used in web content in two ways: you can directly write the <svg> element within the html, containing svg elements to draw the image.
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Critical rendering path - Web Performance
Web › Performance › Critical rendering path
after the render tree is complete, layout occurs, defining the location and size of all the render tree elements.
...nodes contain all relevant information about the html element.
...if there's a display: none; set on an element, neither it, nor any of its descendants, are in the render tree.
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Populating the page: how browsers work - Web Performance
Web › Performance › How browsers work
the <html> element is the first tag and root node of the document tree.
... waiting to obtain css doesn't block html parsing or downloading, but it does block javascript, because javascript is often used to query css properties’ impact on elements.
...the cssom and dom trees created in the parsing step are combined into a render tree which is then used to compute the layout of every visible element, which is then painted to the screen.
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externalResourcesRequired - SVG: Scalable Vector Graphics
Web › SVG › Attribute › externalResourcesRequired
the externalresourcesrequired attribute specifies whether referenced resources that are not part of the current document are required for proper rendering of the given container or graphics element.
... this attribute applies to all types of resource references, including style sheets, color profiles and fonts specified by a reference using a <font-face> element or a css @font-face specification.
... in particular, if an element sets externalresourcesrequired="true", then all style sheets must be available since any style sheet might affect the rendering of that element.
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patternContentUnits - SVG: Scalable Vector Graphics
Web › SVG › Attribute › patternContentUnits
the patterncontentunits attribute indicates which coordinate system to use for the contents of the <pattern> element.
... note: that this attribute has no effect if attribute viewbox is specified on the <pattern> element.
... only one element is using this attribute: <pattern> html,body,svg { height:100% } <svg viewbox="0 0 200 100" xmlns="http://www.w3.org/2000/svg"> <!-- a pattern tile that content coordinates and values are computed against the current coordinate user space.
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type - SVG: Scalable Vector Graphics
Web › SVG › Attribute › type
for the <animatetransform> element, it defines the type of transformation, whose values change over time.
... for the <fecolormatrix> element, it indicates the type of matrix operation.
... for the <fefuncr>, <fefuncg>, <fefuncb>, and <fefunca> elements, it indicates the type of component transfer function.
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viewBox - SVG: Scalable Vector Graphics
Web › SVG › Attribute › viewBox
the numbers separated by whitespace and/or a comma, which specify a rectangle in user space which is mapped to the bounds of the viewport established for the associated svg element (not the browser viewport).
... note: values for width or height lower or equal to 0 disable rendering of the element.
... five elements are using this attribute: <marker>, <pattern>, <svg>, <symbol>, and <view>.
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visibility - SVG: Scalable Vector Graphics
Web › SVG › Attribute › visibility
the visibility attribute lets you control the visibility of graphical elements.
... with a value of hidden or collapse the current graphics element is invisible.
... note: if the visibility attribute is set to hidden on a text element, then the text is invisible but still takes up space in text layout calculations.
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<a> - SVG: Scalable Vector Graphics
Web › SVG › Element › a
the <a> svg element creates a hyperlink to other web pages, files, locations in the same page, email addresses, or any other url.
... it is very similar to html’s <a> element.
... svg's <a> element is a container, which means you can create a link around text (like in html) but also around any shape.
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Scripting - SVG: Scalable Vector Graphics
Web › SVG › Scripting
one can override default browser behaviors with the evt.preventdefault( ) method, add eventlisteners to objects with the syntax element.addeventlistener(event, function, usecapture), and set element properties with syntax svgelement.style.setproperty("fill-opacity", "0.0", "").
... function myrect(x,y,w,h,message){ this.message=message this.rect=document.createelementns("http://www.w3.org/2000/svg","rect") this.rect.setattributens(null,"x",x) this.rect.setattributens(null,"y",y) this.rect.setattributens(null,"width",w) this.rect.setattributens(null,"height",h) document.documentelement.appendchild(this.rect) this.rect.addeventlistener("click",this,false) this.handleevent= function(evt){ switch (evt.type){ case "click": alert(this.message)...
... the best way to get access to the document representing an svg document is to look at htmliframeelement.contentdocument (if the document is presented in an <iframe>) or htmlobjectelement.contentdocument (if the document is presented in an <object> element), like this: var svgdoc = document.getelementbyid("iframe_element").contentdocument; in addition, the <iframe>, <embed>, and <object> elements offer a method, getsvgdocument(), which returns the xmldocument representing the element's embedded sv...
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Introduction - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Introduction
basic ingredients html provides elements for defining headers, paragraphs, tables, and so on.
... in much the same way svg provides elements for circles, rectangles, and simple and complex curves.
... a simple svg document consists of nothing more than the <svg> root element and several basic shapes that build a graphic together.
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Other content in SVG - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Other content in SVG
« previousnext » apart from graphic primitives like rectangles and circles, svg offers a set of elements to embed other types of content in images as well.
... embedding raster images much like the img element in html svg has an image element to serve the same purpose.
... the embedded picture becomes a normal svg element.
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SVG In HTML Introduction - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › SVG In HTML Introduction
source here is the source to the example: <html> <head> <title>xtech svg demo</title> <style> stop.begin { stop-color:yellow; } stop.end { stop-color:green; } body.invalid stop.end { stop-color:red; } #err { display:none; } body.invalid #err { display:inline; } </style> <script> function signalerror() { document.getelementbyid('body').setattribute("class", "invalid"); } </script> </head> <body id="body" style="position:absolute; z-index:0; border:1px solid black; left:5%; top:5%; width:90%; height:90%;"> <form> <fieldset> <legend>html form</legend> <p><label>enter something:</label> <input type="text"> <span id="err">incorrect value!</span></p> <p><input type="button" value="activate!" onc...
...the only interesting part is the <svg> element it contains.
... this element and its children are declared to be in the svg namespace.
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Texts - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Texts
basics we have seen in the introducing example, that the text element can be used to put arbitrary text in svg documents: <text x="10" y="10">hello world!</text> the x and y attributes determine, where in the viewport the text will appear.
... like with the shape elements text can be colorized with the fill attribute and given a stroke with the stroke attribute.
... other text-related elements tspan this element is used to mark up sub-portions of a larger text.
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Understanding WebAssembly text format - WebAssembly
WebAssembly › Understanding the text format
) in (table 2 funcref), the 2 is the initial size of the table (meaning it will store two references) and funcref declares that the element type of these references are function reference.
... note: uninitialized elements are given a default throw-on-call value.
... in javascript, the equivalent calls to create such a table instance would look something like this: function() { // table section var tbl = new webassembly.table({initial:2, element:"funcref"}); // function sections: var f1 = ...
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Miscellaneous - Archive of obsolete content
Archive › Add-ons › Code snippets › Miscellaneous
example for firefox: services.startup.quit(services.startup.eforcequit|services.startup.erestart); mouse and keyboard detecting mouse wheel events when scrolling the mouse wheel on an element, the dommousescroll event fires.
...</div> <script type="text/javascript"> var elm = document.getelementbyid("scrollarea"); elm.addeventlistener("dommousescroll", function scroll(event){ //event.detail is positive for a downward scroll, negative for an upward scroll alert("scrolling " + event.detail + " lines"); }, false); </script> if you do not receive a dommousescroll event while holding any of the modifier keys (ctrl,shift,alt,meta) you should check the mousewheel.withcontrolkey.ac...
... see also http://mxr.mozilla.org/seamonkey/source/browser/base/content/browser.js#4674 discovering which element in the loaded document has focus // focusedcontrol stores the focused field, or null if there is none.
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Windows - Archive of obsolete content
Archive › Add-ons › Code snippets › Windows
the following code does not care which element is clicked on, simply responding to all mousedown events equally.
... you could improve this code by checking the event.target element and only setting the startpos if the element matches some criteria.
...} function mousemove(event) { if (startpos) { var newx = event.screenx - startpos[0]; var newy = event.screeny - startpos[1]; window.moveto(newx, newy); } } function mouseup(event) { startpos = null; } window.addeventlistener("mousedown", mousedown, false); window.addeventlistener("mouseup", mouseup, false); window.addeventlistener("mousemove", mousemove, false); xul titlebar element xul applications can take advantage of the titlebar element to achieve a similar result without extra javascript code.
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Displaying web content in an extension without security issues - Archive of obsolete content
Archive › Add-ons › Displaying web content in an extension without security issues
note: dynamic changes of the "type" attribute have no effect, the frame type is read out when the frame element is inserted into the document and never again.
...but if you really have to do this, you will also have to remove the frame element from the document and insert it back.
...cted document and can execute without restrictions): <iframe type="content" onclick="handleclick(event);"/> and the event handler would look like that: function handlebrowserclick(event) { // only react to left mouse clicks if (event.button != 0) return; // default action on link clicks is to go to this link, cancel it event.preventdefault(); if (event.target instanceof htmlanchorelement && event.target.href) openlinkinbrowser(event.target.href); } safe html manipulation functions when it comes to displaying the data, it is tempting to generate some html code and to insert it into the document via innerhtml.
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Defining Cross-Browser Tooltips - Archive of obsolete content
Archive › Misc top level › Defining Cross-Browser Tooltips
in other words, alt text should only be displayed when a user agent cannot display the primary content of the element (e.g., a text-mode browser that cannot display images).
... on the other hand, the html 4.01 definition of the title attribute states: title = text cs this attribute offers advisory information about the element for which it is set.
... unlike the title element, which provides information about an entire document and may only appear once, the title attribute may annotate any number of elements.
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Adding the structure - Archive of obsolete content
Archive › Mozilla › Creating a Mozilla extension › Adding the structure
to implement this ui, we'll add a statusbarpanel element to the statusbar element in the navigator.xul file.
... id="statusbar-icon" mode="normal" value="0"/> </statusbarpanel> <statusbarpanel class="statusbarpanel-iconic" id="tinderbox-status" status="none"/> <statusbarpanel class="statusbarpanel-iconic" id="offline-status"/> <statusbarpanel class="statusbarpanel-iconic" id="security-button" onclick="browserpageinfo(null, 'securitytab')"/> </statusbar> the statusbar xul element defines a horizontal status bar where informative messages about an application's state can be displayed.
... status bars comprise a series of panels, each one defined by a statusbarpanel xul element.
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Using microformats - Archive of obsolete content
Archive › Mozilla › Firefox › Using microformats
var nummicroformats = microformats.count(name, rootelement, options); parameters name the name of the microformat to count.
... rootelement required.
... the dom element at which to begin the search.
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XBL - Archive of obsolete content
Archive › Mozilla › XBL
xml binding language (xbl, sometimes also called extensible bindings language) is a language for describing bindings that can be attached to elements in other documents.
... the element that the binding is attached to, called the bound element, acquires the new behavior specified by the binding.
... bindings can contain event handlers that are registered on the bound element, an implementation of new methods and properties that become accessible from the bound element, and anonymous content that is inserted underneath the bound element.
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XML in Mozilla - Archive of obsolete content
Archive › Mozilla › XML in Mozilla
nology documentation xhtml w3c recommendation xml base w3c recommendation xlink (simple xlinks only) obsolete since gecko 2.0 w3c recommendation fixptr obsolete since gecko 1.9.1 w3c "proposal" xpointer framework obsolete since gecko 1.9.1 w3c recommendation xpointer element() scheme obsolete since gecko 1.9.1 w3c recommendation xpointer xmlns() scheme obsolete since gecko 1.9.1 w3c recommendation xpointer fixptr() scheme obsolete since gecko 1.9.1 this scheme is simply a wrapper for fixptr xpointer xpath1() scheme obsolete since gecko 1.9.1 internet-draft document.load(), documen...
...you can use xhtml elements inside an arbitrary xml document by using the xhtml namespace.
...you can make any xml element into an xlink by using the xlink namespace http://www.w3.org/1999/xlink.
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allowevents - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › allowevents
« xul reference home allowevents type: boolean if true, events are passed to children of the element.
... otherwise, events are passed to the element only.
... on listitem and titlebar elements, mouse events normally do not get sent to their children; instead they are retargeted to the listitem and titlebar element itself.
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right - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › right
« xul reference home right type: string (representing an integer) for elements placed directly within a stack, specifies the pixel position of the right edge of the element relative to the right edge of the stack.
...this location is specified with respect to the right edge of the stack prior to the element being evaluated, or added to the stack.
... placing the element which contains this attribute within the stack may result in the stack changing size.
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Recursive Generation - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Recursive Generation
naturally, the parent will be the new result's content, rather than the outer containing element, and the starting point will be the endpoint of the previous iteration.
... for the top level generation the parent insertion point is the element with the datasources attribute, in this example a <vbox>.
... for nested results, the insertion point is the generated element.
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Sorting Results - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Sorting Results
sorting tree results we'll examine sorting of trees first since trees are the most common element used with sorted items.
...to do this, place a sort attribute on a treecol element referring to the variable to sort by for that column.
...for instance: <treecol id="name" label="name" sort="rdf:http://purl.org/dc/elements/1.1/title" flex="1"/> note that all of this discussion about sorting only applies to tree builders.
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Using Recursive Templates - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Using Recursive Templates
<groupbox type="menu" datasources="people.xml" ref="*" querytype="xml"> <template> <query expr="*"/> <action> <vbox uri="?" class="indent"> <label value="?name"/> </vbox> </action> </template> </groupbox> in this simplified example, the xpath expression just gets the list of child elements of the reference node.
...since the initial reference node is the root of the xml source document, the results are two elements, one for each group element.
...the content is always inserted directly inside the element with the uri attribute.
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Adding Buttons - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Adding Buttons
like html, xul has a number of tags that can be used to create user interface elements.
...this element is used to create simple buttons.
... the button element has two main properties associated with it, a label and an image.
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Introduction - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Introduction
xul provides the ability to create most elements found in modern graphical interfaces.
... some elements that can be created are: input controls such as textboxes and checkboxes toolbars with buttons or other content menus on a menu bar or pop up menus tabbed dialogs trees for hierarchical or tabular information keyboard shortcuts the displayed content can be created from the contents of a xul file or with data from a datasource.
...the contents of menus, trees and other elements can be populated with this data, or with your own data supplied in an rdf file.
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Modifying the Default Skin - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Modifying the Default Skin
support for the userchrome.css file and any of its elements described below are not guaranteed in future versions of firefox.
... a skin is described using css, allowing you to define the colors, borders and images used to draw elements.
...the global directory within this archive contains the main style definitions for how to display the various xul elements.
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Toolbars - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Toolbars
adding a toolbar like a number of elements, xul toolbars are a type of box.
... usually, a row of buttons would appear in the toolbar, but any element can be placed in a toolbar.
... the toolbar is the main element that creates the actual toolbar.
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Updating Commands - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Updating Commands
invoking commands if a command has an oncommand attribute, you can invoke it just by using the docommand method of the command or an element which links to it.
...note that we don't need to figure out which element to use or which controller to use.
...command updaters a command updater is a feature of the commandset element which allows it to update commands when certain events happen.
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columns - Archive of obsolete content
Archive › Mozilla › XUL › columns
child column elements define the individual columns to appear in the grid.
... the columns element may be nested inside another columns element.
... other elements placed inside a columns element occupy the full height of the grid and are placed in their corresponding positions between the columns.
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deck - Archive of obsolete content
Archive › Mozilla › XUL › deck
« xul reference home [ examples | attributes | properties | methods | related ] an element that displays only one of its children at a time.
... inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, remove...
...element, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties selectedindex type: integer returns the index of the currently selected item.
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editor - Archive of obsolete content
Archive › Mozilla › XUL › editor
ment, contentwindow, docshell, editingsession, editortype, webbrowserfind, webnavigation methods geteditor, gethtmleditor, makeeditable examples this example shows how to made the editor editable by setting the designmode property of the loaded html document: <script language="javascript"> function initeditor(){ // this function is called to set up the editor var editor = document.getelementbyid("myeditor"); editor.contentdocument.designmode = 'on'; } </script> <editor id="myeditor" editortype="html" src="about:blank" flex="1" type="content-primary"/> once editable, the document can have special formatting and other html pieces added to it using the document.execcommand method: var editor = document.getelementbyid("myeditor"); // toggle bold for the current selection edit...
... src type: uri the uri of the content to appear in the element.
... properties accessibletype type: integer a value indicating the type of accessibility object for the element.
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listcols - Archive of obsolete content
Archive › Mozilla › XUL › listcols
« xul reference home [ examples | attributes | properties | methods | related ] a container for the columns of a listbox, each of which are created with the listcol element.
... there should be only one listcols element in a list box.
... if there is no listcols element, the list box has a single column.
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promptBox - Archive of obsolete content
Archive › Mozilla › XUL › promptBox
method overview nsidomelement appendprompt(args, onclosecallback); void removeprompt(nsidomelement aprompt); nodelist listprompts(nsidomelement aprompt); methods appendprompt() creates a new prompt, adding it to the tab.
... nsidomelement appendprompt( args, onclosecallback ); parameters args arguments for the prompt.
... return value an nsidomelement object representing the new prompt.
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row - Archive of obsolete content
Archive › Mozilla › XUL › row
« xul reference home [ examples | attributes | properties | methods | related ] a single row in a rows element.
... each child of the row element is placed in each successive cell of the grid.
... the row with the most child elements determines the number of columns in each row, which may be smaller or larger than the number of column elements defined in the grid.
...And 3 more matches
template - Archive of obsolete content
Archive › Mozilla › XUL › template
« xul reference home [ examples | attributes | properties | methods | related ] used to declare a template for rule-based construction of elements.
... elements are constructed from a datasource.
... for more information see the rule element.
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toolbaritem - Archive of obsolete content
Archive › Mozilla › XUL › toolbaritem
this element should wrap all customizable items (unless they're instances of toolbarbutton).
... if you don't need the thing you're placing in the toolbar to be customized then it doesn't need to be in a toolbaritem element.
... the element is used, for example, to hold the location bar's textbox in firefox.
...And 3 more matches
treechildren - Archive of obsolete content
Archive › Mozilla › XUL › treechildren
« xul reference home [ examples | attributes | properties | methods | related ] this element is the body of the tree.
... for content trees, the content will be placed inside this element.
... this element is also used to define container rows in the tree.
...And 3 more matches
treecols - Archive of obsolete content
Archive › Mozilla › XUL › treecols
« xul reference home [ examples | attributes | properties | methods | related ] a group of treecol elements.
... there should one and only one treecols element in a tree.
... inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, w...
...And 3 more matches
Windows and menus in XULRunner - Archive of obsolete content
Archive › Mozilla › XULRunner › Windows and menus in XULRunner
<window> is the basic windowing element in xul.
...although i have not seen it mentioned yet, i am assuming that you can only have one <window> element per xul file.
...the css is used to apply formatting to elements, just as it would in html.
...And 3 more matches
Archived Mozilla and build documentation - Archive of obsolete content
Archive › Mozilla
web pages can reference generators via <link rel="microsummary"> elements in their <head> elements.
... introducing the audio api extension the audio data api extension extends the html5 specification of the <audio> and <video> media elements by exposing audio metadata and raw audio data.
... space manager high level design the space manager and associated classes and structures are used by block and line layout to manage rectangular regions that are occupied and available, for correct handling of floated elements and the elements that flow around them.
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Extentsions FAQ - Archive of obsolete content
Archive › Newsgroup summaries › mozilla-dev-extensions › Extentsions FAQ
var newnode = document.createelement(" ...
..."); var replaceme = document.getelementbyid("replaceme"); replaceme.parentnode.replacechild(newnode, replaceme); is it possible to place an image in the window that can be moved to anywhere in the window, and always remain on top of everything else?(similiar to using position:absolute and-index:100000 in html) you can almost do this with a stack: <window ...> <stack flex="1"> <image top="40" left="80"/> <vbox> other content here </vbox> </stack> </window> the only restriction is that your image can't overlap the right or bottom of the window.
... //setting the state document.getelementbyid("toolbar-button").setattribute("toolbar-button", "on"); //or document.getelementbyid("toolbar-button").setattribute("toolbar-button","off"); //css #myexten-toolbar-button[myexten-toolbar-button="on"] { list-style-image: url("chrome://myexten/skin/toolbar-button.png"); -moz-image-region: rect(0px 24px 24px 0px);} #myexten-toolbar-button[myexten-toolbar-button="off"] { list-style-im...
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Why RSS Slash is Popular - Counting Your Comments - Archive of obsolete content
Archive › RSS › Article › Why RSS Slash is Popular - Counting Your Comments
an example using the most popular element of the rss slash module is shown below: <?xml version="1.0"> <rss version="2.0" xmlns:slash="http://purl.org/rss/1.0/modules/slash/" > <channel> <title>example</title> <description>an rss example with slash</description> <lastbuilddate>sun, 15 may 2005 13:02:08 -0500</lastbuilddate> <link>http://www.example.com</link> ...
... <title>first article!</title> <guid>d77d2e80-0487-4e8c-a35d-a93f12a0ff7d:2005/05/15/112</guid> <pubdate>sun, 15 may 2005 08:14:11 -0500</lastbuilddate></pubdate> <link>http://www.example.com/blog/2005/05/15/112</link> <slash:comments>118</slash:comments> </item> </channel> </rss> the <slash:comments> element is it reason that the rss slash module is popular.
... this element gives the (current) total number of comments made for the item -- for the blog post.
...And 3 more matches
-ms-content-zooming - Archive of obsolete content
Archive › Web › CSS › -ms-content-zooming
initial valuezoom for the top level element, none for all other elementsapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values none the initial value of all elements except the top-level element.
... the element is not zoomable.
... zoom the initial value of the top-level element.
...And 3 more matches
-ms-scroll-chaining - Archive of obsolete content
Archive › Web › CSS › -ms-scroll-chaining
initial valuechainedapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values chained initial value.
... the nearest scrollable parent element begins scrolling when the user hits a scroll limit during any manipulation.
...in this case the image container has its -ms-scroll-chaining property set to chained, which means that when a user is scrolling through a nested scrollable element and it hits its boundary the parent scrollable element will begin to scroll in the same direction.
...And 3 more matches
-ms-scroll-translation - Archive of obsolete content
Archive › Web › CSS › -ms-scroll-translation
the -ms-scroll-translation css property is a microsoft extension that specifies whether vertical-to-horizontal scroll wheel translation occurs on the specified element.
... initial valuenoneapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values vertical-to-horizontal vertical to horizontal translation, as described in remarks, will take place when appropriate.
...the value is inherited from the element's parent element.
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Styling Abbreviations and Acronyms - Archive of obsolete content
Archive › Web Standards › Styling Abbreviations and Acronyms
summary: the html elements abbr and acronym are useful accessibility aids, but their styling can come as a surprise to authors.
... see how you can take control of their presentation without sacrificing the benefits these elements provide.
... many authors are beginning to use the html elements abbr (abbreviation) and acronym in their web pages.
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Create the Canvas and draw on it - Game development
Games › Tutorials › 2D Breakout game pure JavaScript › Create the Canvas and draw on it
this can be done using html and the <canvas> element.
... the game's html the html document structure is quite simple, as the game will be rendered entirely on the <canvas> element.
...the body contains <canvas> and <script> elements — we will render the game inside the first one and write the javascript code that controls it in the second one.
...And 3 more matches
Initialize the framework - Game development
Games › Tutorials › 2D breakout game Phaser › Initialize the framework
this can be done using html — the phaser framework will generate the required <canvas> element.
... the game's html the html document structure is quite simple, as the game will be rendered entirely on the <canvas> element generated by the framework.
... update the src value of the first <script> element as shown above.
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Marking up a letter - Learn web development
Learn › HTML › Introduction to HTML › Marking up a letter
in this assignment, you'll have a letter to mark up as a test for your html text formatting skills, as well as hyperlinks and proper use of the html <head> element.
... block/structural semantics use appropriate document structure including doctype, and <html>, <head> and <body> elements.
... put the two addresses inside <address> elements.
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Mozilla splash page - Learn web development
Learn › HTML › Multimedia and embedding › Mozilla splash page
you don't need to touch the css, just the html inside the <body> element — as long as you insert the correct markup, the styling will make it look correct.
... adding a logo to the header inside the <header> element, add an <img> element that will embed the small version of the firefox logo in the header.
... adding a video to the main article content just inside the <article> element (right below the opening tag), embed the youtube video found at https://www.youtube.com/watch?v=ojcncvb1olg, using the appropriate youtube tools to generate the code.
...And 3 more matches
Making asynchronous programming easier with async and await - Learn web development
Learn › JavaScript › Asynchronous › Async await
status: ${response.status}`); } else { return response.blob(); } }) .then(myblob => { let objecturl = url.createobjecturl(myblob); let image = document.createelement('img'); image.src = objecturl; document.body.appendchild(image); }) .catch(e => { console.log('there has been a problem with your fetch operation: ' + e.message); }); by now, you should have a reasonable understanding of promises and how they work, but let's convert this to use async/await to see how much simpler it makes things: async function myfetch() { let response = await fetch('co...
...status: ${response.status}`); } else { let myblob = await response.blob(); let objecturl = url.createobjecturl(myblob); let image = document.createelement('img'); image.src = objecturl; document.body.appendchild(image); } } myfetch() .catch(e => { console.log('there has been a problem with your fetch operation: ' + e.message); }); it makes code much simpler and easier to understand — no more .then() blocks everywhere!
...status: ${response.status}`); } else { return await response.blob(); } } myfetch().then((blob) => { let objecturl = url.createobjecturl(blob); let image = document.createelement('img'); image.src = objecturl; document.body.appendchild(image); }).catch(e => console.log(e)); you can try typing in the example yourself, or running our live example (see also the source code).
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Choosing the right approach - Learn web development
Learn › JavaScript › Asynchronous › Choosing the right approach
le that loads a resource via the xmlhttprequest api (run it live, and see the source): function loadasset(url, type, callback) { let xhr = new xmlhttprequest(); xhr.open('get', url); xhr.responsetype = type; xhr.onload = function() { callback(xhr.response); }; xhr.send(); } function displayimage(blob) { let objecturl = url.createobjecturl(blob); let image = document.createelement('img'); image.src = objecturl; document.body.appendchild(image); } loadasset('coffee.jpg', 'blob', displayimage); pitfalls nested callbacks can be cumbersome and hard to read (i.e.
...we then run it once per second using setinterval(), creating the effect of a digital clock that updates once per second (see this live, and also see the source): function displaytime() { let date = new date(); let time = date.tolocaletimestring(); document.getelementbyid('demo').textcontent = time; } const createclock = setinterval(displaytime, 1000); pitfalls the frame rate isn't optimized for the system the animation is running on, and can be somewhat inefficient.
... single delayed operation repeating operation multiple sequential operations multiple simultaneous operations no no yes see promise.all(), below code example the following code fetches an image from the server and displays it inside an <img> element; see it live also, and see also the source code: fetch('coffee.jpg') .then(response => response.blob()) .then(myblob => { let objecturl = url.createobjecturl(myblob); let image = document.createelement('img'); image.src = objecturl; document.body.appendchild(image); }) .catch(e => { console.log('there has been a problem with your fetch operation: ' + e.message); }); pitfalls promise ...
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Componentizing our React app - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › React components
that second bullet is especially valuable: making a component out of common ui elements allows you to change your code in one place and see those changes everywhere that component is used.
...in app.js, add the following line near the top of the file to import todo: import todo from "./components/todo"; with this component imported, you can replace all of the <li> elements in app.js with <todo /> component calls.
...once you’re done, the todo component's <input /> element will read like this: <input id="todo-0" type="checkbox" defaultchecked={props.completed} /> and your browser should update to show only eat being checked: if you change each <todo /> component’s completed prop, your browser will check or uncheck the equivalent rendered checkboxes accordingly.
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React interactivity: Events and state - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › React interactivity events state
for example: const btn = document.queryselector('button'); btn.addeventlistener('click', () => { alert("hi!"); }); in react, we write event handlers directly on the elements in our jsx, like this: <button type="button" onclick={() => alert("hi!")} > say hi!
... in the above example, we're adding an onclick attribute to the <button> element.
...it should end up looking something like this: function handlesubmit(e) { e.preventdefault(); alert('hello, world!'); } to use this function, add an onsubmit attribute to the <form> element, and set its value to the handlesubmit function: <form onsubmit={handlesubmit}> now if you head back to your browser and click on the "add" button, your browser will show you an alert dialog with the words "hello, world!" — or whatever you chose to write there.
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Starting our Svelte Todo list app - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Svelte Todo list beginning
create a file named src/components/todos.svelte with the following content: <h1>svelte to-do list</h1> change the title element in public/index.html to contain the text svelte to-do list: <title>svelte to-do list</title> open src/app.svelte and replace its contents with the following: <script> import todos from './components/todos.svelte' </script> <todos /> in development mode, svelte will issue a warning in the browser console when specifying a prop that doesn't exist in the component; in this case ...
...once we have put our styles in place, though, any element with this class will be hidden from sighted users and still available to screen reader users — this is because these words are not needed by sighted users; they are there to provide more information about what the button does for screenreader users that do not have the extra visual context to help them.
... further down, you can find the following <ul> element: <ul role="list" classname="todo-list stack-large" aria-labelledby="list-heading"> the role attribute helps assistive technology explain what kind of semantic value an element has — or what its purpose is.
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Adding a new todo form: Vue events, methods, and models - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Vue methods events models
go back to app.vue and add the following import statement just below the previous one, inside your <script> element: import todoform from './components/todoform'; you also need to register the new component in your app component — update the components property of the component object so that it looks like this: components: { todoitem, todoform } finally for this section, render your todoform component inside your app by adding the <to-do-form /> element inside your app's <template>, li...
... add this like so: export default { methods: { onsubmit() { console.log('form submitted') } } } next we need to bind the method to our <form> element's submit event handler.
...add the submit handler to your <form> element like so: <form @submit="onsubmit"> when you run this, the app still posts the data to the server, causing a refresh.
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Accessibility information for UI designers and developers
Mozilla › Accessibility › Accessibility information for UI designers
only one element has focus at a given time, typically revealed by browsers with a dotted outline.
...this includes form elements like inputs and select boxes, but also buttons.
... for form elements, it should be clear what kind of input is expected.
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Limitations of chrome scripts
Mozilla › Firefox › Multiprocess Leftovers › Limitations of chrome scripts
for this reason, add-ons that try to access content objects in fresh <browser> elements may run into trouble.
... however, you must listen to content-document-global-created and document-element-inserted in a frame script.
...in an http observer, you can get the browser message manager for the window using code like this: observe: function (subject, topic, data) { if (topic == "http-on-modify-request") { var httpchannel = subject.queryinterface(ci.nsihttpchannel); var loadcontext = httpchannel.notificationcallbacks.getinterface(ci.nsiloadcontext); // topframeelement is the <browser> element var topframeelement = loadcontext.topframeelement; var browsermm = topframeelement.messagemanager; console.log("browsermm: " + browsermm); } } however, before firefox 38, this technique will not work if multiprocess firefox is disabled: specifically, topframeelement will be null.
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PopupNotifications.jsm
Mozilla › JavaScript code modules › PopupNotifications.jsm
notification getnotification( string id xulelement browser ); parameters id the notification id to search for.
... browser the xul <xul:browser> element whose notifications should be searched.
... notification show( browser, id, message, anchorid, mainaction, secondaryactions, options ); parameters browser the xul <xul:browser> element with which the notification is associated.
...And 3 more matches
Gecko object attributes
Mozilla › Tech › Accessibility › AT-APIs › Gecko › Attrs
object attributes list aria attributes all aria attributes used on dom element (i.e., any attribute prefixed by 'aria-') are exposed as object attributes; name is preserved except the 'aria-' prefix is cut.
... common attributes class the class name for an element from html, xul, svg, etc.
... this is useful for retrieving microformat semantics for an element.
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Avoiding leaks in JavaScript XPCOM components
Mozilla › Tech › XPCOM › Guide › Avoiding leaks in JavaScript components
this means that neither the element nor any of the properties nor any of the objects reachable from those properties can be freed until the document is no longer displayed.
...xbl fields are implemented as javascript properties on the bound element's wrapper, so they have all the hazards of javascript properties.
...tion _filterradiogroup(anode) { switch (anode.localname) { case "radio": return nodefilter.filter_accept; case "template": case "radiogroup": return nodefilter.filter_reject; default: return nodefilter.filter_skip; } } var iterator = this.ownerdocument.createtreewalker(this, nodefilter.show_element, _filterradiogroup, true); while (iterator.nextnode()) radiochildren.push(iterator.currentnode); return this.mradiochildren = radiochildren; in this example, the iterator object is an xpcom object that is wrapped so the javascript code can use it.
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nsIDocShell
Mozilla › Tech › XPCOM › Reference › Interface › nsIDocShell
instead, retrieve an nsidocshell from a browser or other document container element.
...called by the focus manager when the user tabs to the frame rather than an element.
...in the case of a chrome frame this is the same as the frame element.
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nsITreeBoxObject
Mozilla › Tech › XPCOM › Reference › Interface › nsITreeBoxObject
void invalidaterange(in long startindex, in long endindex); void invalidatecolumnrange(in long startindex, in long endindex, in nsitreecolumn col); long getrowat(in long x, in long y); void getcellat(in long x, in long y, out long row, out nsitreecolumn col, out acstring childelt); void getcoordsforcellitem(in long row, in nsitreecolumn col, in acstring element, out long x, out long y, out long width, out long height); boolean iscellcropped(in long row, in nsitreecolumn col); void rowcountchanged(in long index, in long count); void beginupdatebatch(); void endupdatebatch(); void clearstyleandimagecaches(); attributes attribute type description columns nsitreecolumns readonl...
... treebody nsidomelement readonly: obtain the treebody content node.
... childelt the pseudoelement hit: this can have values of "cell", "twisty", "image", and "text".
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XPCOM Interface Reference
Mozilla › Tech › XPCOM › Reference › Interface
anagernsicookiemanager2nsicookiepermissionnsicookiepromptservicensicookieservicensicookiestoragensicrashreporternsicryptohmacnsicryptohashnsicurrentcharsetlistenernsicyclecollectorlistenernsidbchangelistenernsidbfolderinfonsidnslistenernsidnsrecordnsidnsrequestnsidnsservicensidomcanvasrenderingcontext2dnsidomchromewindownsidomclientrectnsidomdesktopnotificationnsidomdesktopnotificationcenternsidomelementnsidomeventnsidomeventgroupnsidomeventlistenernsidomeventtargetnsidomfilensidomfileerrornsidomfileexceptionnsidomfilelistnsidomfilereadernsidomfontfacensidomfontfacelistnsidomgeogeolocationnsidomgeopositionnsidomgeopositionaddressnsidomgeopositioncallbacknsidomgeopositioncoordsnsidomgeopositionerrornsidomgeopositionerrorcallbacknsidomgeopositionoptionsnsidomglobalpropertyinitializernsidomhtmlaudio...
...elementnsidomhtmlformelementnsidomhtmlmediaelementnsidomhtmlsourceelementnsidomhtmltimerangesnsidomjswindownsidommousescrolleventnsidommoznetworkstatsnsidommoznetworkstatsdatansidommoznetworkstatsmanagernsidommoztoucheventnsidomnshtmldocumentnsidomnavigatordesktopnotificationnsidomnodensidomofflineresourcelistnsidomorientationeventnsidomparsernsidomprogresseventnsidomserializernsidomsimplegestureeventnsidomstoragensidomstorage2nsidomstorageeventobsoletensidomstorageitemnsidomstoragelistnsidomstoragemanagernsidomstoragewindownsidomuserdatahandlernsidomwindownsidomwindow2nsidomwindowinternalnsidomwindowutilsnsidomxpathevaluatornsidomxpathexceptionnsidomxpathexpressionnsidomxpathresultnsidomxulcontrolelementnsidomxulelementnsidomxullabeledcontrolelementnsidomxulselectcontrolelementnsidomxulselectcon...
...trolitemelementnsidatasignatureverifiernsidebugnsidebug2nsidevicemotionnsidevicemotiondatansidevicemotionlistenernsidialogcreatornsidialogparamblocknsidictionarynsidirindexnsidirindexlistenernsidirindexparsernsidirectoryenumeratornsidirectoryiteratornsidirectoryservicensidirectoryserviceprovidernsidirectoryserviceprovider2nsidiskcachestreaminternalnsidispatchsupportnsidocshellnsidocumentloadernsidownloadnsidownloadhistorynsidownloadmanagernsidownloadmanageruinsidownloadobservernsidownloadprogresslistenernsidownloadernsidragdrophandlernsidragservicensidragsessionnsidroppedlinkhandlernsidroppedlinkitemnsidynamiccontainernsieditornsieditorboxobjectnsieditordocshellnsieditorimesupportnsieditorloggingnsieditormailsupportnsieditorobservernsieditorspellchecknsieffectivetldservicensienumeratornsienvironm...
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Mozilla
Mozilla
the style system is the part of the code in gecko that is responsible for producing a computed value for every property for every element.
... chrome registration chrome is the set of user interface elements of the application window that are outside the window's content area.
... toolbars, menu bars, progress bars, and window title bars are all examples of elements that are typically part of the chrome.
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Flash Activation: Browser Comparison - Plugins
Plugins › Flash Activation: Browser Comparison
the user can click on the flash object or the location bar icon to activate flash: users have the choice to allow flash just for the current session, or to remember their choice: google chrome in-page ui is displayed when the site attempts to use flash without fallback content: a user can click the plugin element to show a prompt for allowing flash: if the site provides fallback content for an object element, chrome will display that content and will not prompt the user to enable flash.
... if a flash element is not visible to the user, the user will not get a visible prompt.
...the user can click the flash object to show activation options: users have the choice to allow flash just for the current session, or to remember their choice: site authoring tips if a flash element is very small, hidden, or covered by other content, users will probably not notice that flash is required and will become confused.
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Paint Flashing Tool - Firefox Developer Tools
Tools › Paint Flashing Tool
for example, a repaint will be needed if the user scrolls the page or moves the mouse pointer over an element with a :hover pseudo-class that changes the element's style.
...the example below shows two different ways to move an element using a css transition.
... the first way applies the transition to the element's margin-left, while the second way moves the element using the transform property.
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Advanced animations - Web APIs
Web › API › Canvas API › Tutorial › Advanced animations
var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); var ball = { x: 100, y: 100, radius: 25, color: 'blue', draw: function() { ctx.beginpath(); ctx.arc(this.x, this.y, this.radius, 0, math.pi * 2, true); ctx.closepath(); ctx.fillstyle = this.color; ctx.fill(); } }; ball.draw(); nothing special here, the ball is actually a simple circle and gets drawn with the help...
... var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); var raf; var ball = { x: 100, y: 100, vx: 5, vy: 2, radius: 25, color: 'blue', draw: function() { ctx.beginpath(); ctx.arc(this.x, this.y, this.radius, 0, math.pi * 2, true); ctx.closepath(); ctx.fillstyle = this.color; ctx.fill(); } }; function draw() { ctx.clearrect(0,0, canvas.width, canvas.height); bal...
... <canvas id="canvas" style="border: 1px solid" width="600" height="300"></canvas> var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); var raf; var ball = { x: 100, y: 100, vx: 5, vy: 2, radius: 25, color: 'blue', draw: function() { ctx.beginpath(); ctx.arc(this.x, this.y, this.radius, 0, math.pi * 2, true); ctx.closepath(); ctx.fillstyle = this.color; ctx.fill(); } }; function draw() { ctx.clearrect(0,0, canvas.width, canvas.height); bal...
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Optimizing canvas - Web APIs
Web › API › Canvas API › Tutorial › Optimizing canvas
« previousnext » the <canvas> element is one of the most widely used tools for rendering 2d graphics on the web.
...this article provides suggestions for optimizing your use of the canvas element to ensure that your graphics perform well.
... mycanvas.offscreencanvas = document.createelement('canvas'); mycanvas.offscreencanvas.width = mycanvas.width; mycanvas.offscreencanvas.height = mycanvas.height; mycanvas.getcontext('2d').drawimage(mycanvas.offscreencanvas, 0, 0); avoid floating-point coordinates and use integers instead sub-pixel rendering occurs when you render objects on a canvas without whole values.
...And 3 more matches
Canvas API - Web APIs
Web › API › Canvas API
the canvas api provides a means for drawing graphics via javascript and the html <canvas> element.
...the webgl api, which also uses the <canvas> element, draws hardware-accelerated 2d and 3d graphics.
... html <canvas id="canvas"></canvas> javascript the document.getelementbyid() method gets a reference to the html <canvas> element.
...And 3 more matches
Document.forms - Web APIs
Web › API › Document › forms
the forms read-only property of the document interface returns an htmlcollection listing all the <form> elements contained in the document.
... note: similarly, you can access a list of a form's component user input elements using the htmlformelement.elements property.
...each item in the collection is a htmlformelement representing a single <form> element.
...And 3 more matches
Document.hasFocus() - Web APIs
Web › API › Document › hasFocus
the hasfocus() method of the document interface returns a boolean value indicating whether the document or any element inside the document has focus.
... this method can be used to determine whether the active element in a document has focus.
... when viewing a document, an element with focus is always the active element in the document, but an active element does not necessarily have focus.
...And 3 more matches
GlobalEventHandlers.onclick - Web APIs
Web › API › GlobalEventHandlers › onclick
the onclick property of the globaleventhandlers mixin is the eventhandler for processing click events on a given element.
... the click event is raised when the user clicks on an element.
...within the function, this will be the element upon which the event was triggered.
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GlobalEventHandlers.ondragend - Web APIs
Web › API › GlobalEventHandlers › ondragend
syntax var dragendhandler = targetelement.ondragend; return value dragendhandler the dragend event handler for element targetelement.
... example this example shows two ways to use the ondragend attribute handler to set an element's dragend event handler.
...tml> <html lang=en> <title>examples of using the drag and drop global event attribute</title> <meta content="width=device-width"> <style> div { margin: 0em; padding: 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; } </style> </head> <script> function dragstart_handler(ev) { console.log("dragstart"); // change the source element's background color to signify drag has started ev.currenttarget.style.border = "dashed"; ev.datatransfer.setdata("text", ev.target.id); } function dragover_handler(ev) { console.log("dragover"); // change the target element's border to signify a drag over event // has occurred ev.currenttarget.style.background = "lightblue"; ev.preventdefault(); } function drop_handler(ev) { console.log...
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GlobalEventHandlers.ondragenter - Web APIs
Web › API › GlobalEventHandlers › ondragenter
syntax var dragenterhandler = targetelement.ondragenter; return value dragenterhandler the dragenter event handler for element targetelement.
... example this example demonstrates using the ondragenter attribute handler to set an element's dragenter event handler.
...tml> <html lang=en> <title>examples of using the drag and drop global event attribute</title> <meta content="width=device-width"> <style> div { margin: 0em; padding: 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; } </style> </head> <script> function dragstart_handler(ev) { console.log("dragstart"); // change the source element's background color to signify drag has started ev.currenttarget.style.border = "dashed"; ev.datatransfer.setdata("text", ev.target.id); } function dragover_handler(ev) { console.log("dragover"); // change the target element's border to signify a drag over event // has occurred ev.currenttarget.style.background = "lightblue"; ev.preventdefault(); } function drop_handler(ev) { console.log...
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GlobalEventHandlers.ondragexit - Web APIs
Web › API › GlobalEventHandlers › ondragexit
syntax var dragexithandler = targetelement.ondragexit; return value dragexithandler the dragexit event handler for element targetelement.
... example this example demonstrates using the ondragexit attribute handler to set an element's dragexit event handler.
...tml> <html lang=en> <title>examples of using the drag and drop global event attribute</title> <meta content="width=device-width"> <style> div { margin: 0em; padding: 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; } </style> </head> <script> function dragstart_handler(ev) { console.log("dragstart"); // change the source element's background color to signify drag has started ev.currenttarget.style.border = "dashed"; ev.datatransfer.setdata("text", ev.target.id); } function dragover_handler(ev) { console.log("dragover"); // change the target element's border to signify a drag over event // has occurred ev.currenttarget.style.background = "lightblue"; ev.preventdefault(); } function drop_handler(ev) { console.log...
...And 3 more matches
GlobalEventHandlers.ondragleave - Web APIs
Web › API › GlobalEventHandlers › ondragleave
syntax var dragleavehandler = targetelement.ondragleave; return value dragleavehandler the dragleave event handler for element targetelement.
... example this example demonstrates using the ondragleave attribute handler to set an element's dragleave event handler.
...tml> <html lang=en> <title>examples of using the drag and drop global event attribute</title> <meta content="width=device-width"> <style> div { margin: 0em; padding: 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; } </style> </head> <script> function dragstart_handler(ev) { console.log("dragstart"); // change the source element's border to signify drag has started ev.currenttarget.style.border = "dashed"; ev.datatransfer.setdata("text", ev.target.id); } function dragover_handler(ev) { console.log("dragover"); // change the target element's background color to signify a drag over event // has occurred ev.currenttarget.style.background = "lightblue"; ev.preventdefault(); } function drop_handler(ev) { console.log...
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IntersectionObserver.IntersectionObserver() - Web APIs
Web › API › IntersectionObserver › IntersectionObserver
syntax var observer = new intersectionobserver(callback[, options]); parameters callback a function which is called when the percentage of the target element is visible crosses a threshold.
...you can provide any combination of the following options: root an element or document object which is an ancestor of the intended target, whose bounding rectangle will be considered the viewport.
...the syntax is approximately the same as that for the css margin property; see the root element and root margin in intersection observer api for more information on how the margin works and the syntax.
...And 3 more matches
IntersectionObserver.rootMargin - Web APIs
Web › API › IntersectionObserver › rootMargin
each side of the rectangle represented by rootmargin is added to the corresponding side in the root element's bounding box before the intersection test is performed.
... this lets you, for example, adjust the bounds outward so that the target element is considered 100% visible even if a certain number of pixels worth of width or height is clipped away, or treat the target as partially hidden if an edge is too close to the edge of the root's bounding box.
... see the root element and root margin in intersection observer api for a more in-depth look at the root margin and how it works with the root's bounding box.
...And 3 more matches
IntersectionObserver.unobserve() - Web APIs
Web › API › IntersectionObserver › unobserve
the intersectionobserver method unobserve() instructs the intersectionobserver to stop observing the specified target element.
... syntax intersectionobserver.unobserve(target); parameters target the element to cease observing.
... if the specified element isn't being observed, this method does nothing and no exception is thrown.
...And 3 more matches
KeyframeEffect.KeyframeEffect() - Web APIs
Web › API › KeyframeEffect › KeyframeEffect
syntax var keyframes = new keyframeeffect(element, keyframeset, keyframeoptions); var keyframes = new keyframeeffect(sourcekeyframes); parameters the first type of constructor (see above) creates a completely new keyframeeffect object instance.
... its parameters are: element the dom element to be animated, or null.
... fill optional dictates whether the animation's effects should be reflected by the element(s) prior to playing ("backwards"), retained after the animation has completed playing ("forwards"), or both.
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KeyframeEffect.setKeyframes() - Web APIs
Web › API › KeyframeEffect › setKeyframes
element.animate([ { // from opacity: 0, color: "#fff" }, { // to opacity: 1, ​ color: "#000" } ], 2000); offsets for each keyframe can be specified by providing an offset value.
... element.animate([ { opacity: 1 }, { opacity: 0.1, offset: 0.7 }, { opacity: 0 } ], 2000); note: offset values, if provided, must be between 0.0 and 1.0 (inclusive) and arranged in ascending order.
... element.animate([ { opacity: 1, easing: 'ease-out' }, { opacity: 0.1, easing: 'ease-in' }, { opacity: 0 } ], 2000); in this example, the specified easing only applies from the keyframe where it is specified until the next keyframe.
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Using the MediaStream Recording API - Web APIs
Web › API › MediaStream Recording API › Using the MediaStream Recording API
first of all, we style the <label> how we want it, making sure that it has enough z-index to always sit above the other elements and therefore be focusable/clickable: label { font-family: 'notocoloremoji'; font-size: 3rem; position: absolute; top: 2px; right: 3px; z-index: 5; cursor: pointer; } then we hide the actual checkbox, because we don't want it cluttering up our ui: input[type=checkbox] { position: absolute; top: -100px; } next, we style the information screen (wrapped in an <...
...aside> element) how we want it, give it fixed position so that it doesn't appear in the layout flow and affect the main ui, transform it to the position we want it to sit in by default, and give it a transition for smooth showing/hiding: aside { position: fixed; top: 0; left: 0; text-shadow: 1px 1px 1px black; width: 100%; height: 100%; transform: translatex(100%); transition: 0.6s all; background-color: #999; background-image: linear-gradient(to top right, rgba(0,0,0,0), rgba(0,0,0,0.5)); } last, we write a rule to say that when the checkbox is checked (when we click/focus the label), the adjacent <aside> element will have its horizontal translation value changed and transition smoothly into view: input[type=checkbox]:checked ~ aside { transform: translatex(0)...
...we then use the mediarecorder api to record the stream, and output each recorded snippet into the source of a generated <audio> element so it can be played back.
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MediaStream Recording API - Web APIs
Web › API › MediaStream Recording API
the mediastream recording api makes it possible to capture the data generated by a mediastream or htmlmediaelement object for analysis, processing, or saving to disk.
... overview of the recording process the process of recording a stream is simple: set up a mediastream or htmlmediaelement (in the form of an <audio> or <video> element) to serve as the source of the media data.
... } } function download() { var blob = new blob(recordedchunks, { type: "video/webm" }); var url = url.createobjecturl(blob); var a = document.createelement("a"); document.body.appendchild(a); a.style = "display: none"; a.href = url; a.download = "test.webm"; a.click(); window.url.revokeobjecturl(url); } // demo: to download after 9sec settimeout(event => { console.log("stopping"); mediarecorder.stop(); }, 9000); examining and controlling the recorder status you can also use the properties of the mediarecorder object to determine ...
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Node.childNodes - Web APIs
Web › API › Node › childNodes
the node.childnodes read-only property returns a live nodelist of child nodes of the given element where the first child node is assigned index 0.
... syntax let nodelist = elementnodereference.childnodes; examples simple usage // parg is an object reference to a <p> element // first check that the element has child nodes if (parg.haschildnodes()) { let children = parg.childnodes; for (let i = 0; i < children.length; i++) { // do something with each child as children[i] // note: list is live!
... adding or removing children will change the list's `length` } } remove all children from a node // this is one way to remove all children from a node // box is an object reference to an element while (box.firstchild) { //the list is live so it will re-index each call box.removechild(box.firstchild); } notes the items in the collection of nodes are objects, not strings.
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Node.localName - Web APIs
Web › API › Node › localName
in dom4 this api was moved from node to the element and attr interfaces.
... syntax name = element.localname name is the local name as a string (see notes below for details) example (must be served with xml content type, such as text/xml or application/xhtml+xml.) <html xmlns="http://www.w3.org/1999/xhtml" xmlns:svg="http://www.w3.org/2000/svg"> <head> <script type="application/javascript"><![cdata[ function test() { var text = document.getelementbyid('text'); var circle = document.getelementbyid('circle'); text.value = "<svg:circle> has:\n" + "localname = '" + circle.localname + "'\n" + "namespaceuri = '" + circle.namespaceuri + "'"; } ]]></script> </head> <body onload="test()"> <svg:svg version="1.1" width="100px" height="100px" viewbox="0 0 100 100"> <svg:circle cx="50" cy="50" r="30...
...comm:partners, partners is the local name and ecomm is the prefix: <ecomm:business id="soda_shop" type="brick_n_mortar" xmlns:ecomm="http://example.com/ecomm"> <ecomm:partners> <ecomm:partner id="1001">tony's syrup warehouse </ecomm:partner> </ecomm:partners> </ecomm:business> note: in gecko 1.9.2 and earlier, the property returns the upper-cased version of the local name for html elements in html doms (as opposed to xhtml elements in xml doms).
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Node.nodeType - Web APIs
Web › API › Node › nodeType
it distinguishes different kind of nodes from each other, such as elements, text and comments.
... constants node type constants constant value description node.element_node 1 an element node like <p> or <div>.
... node.text_node 3 the actual text inside an element or attr.
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ResizeObserver - Web APIs
Web › API › ResizeObserver
the resizeobserver interface reports changes to the dimensions of an element's content or border box, or the bounding box of an svgelement.
...it does this by only processing elements deeper in the dom in subsequent frames.
... methods resizeobserver.disconnect() unobserves all observed element targets of a particular observer.
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SVGAngle - Web APIs
Web › API › SVGAngle
an svgangle object can be associated with a particular element.
... the associated element is used to determine which element's content attribute to update if the object reflects an attribute.
... unless otherwise described, an svgangle object is not associated with any element.
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Using the Screen Capture API - Web APIs
Web › API › Screen Capture API › Using Screen Capture
examples simple screen capture in this example, the contents of the captured screen area are simply streamed into a <video> element on the same page.
... setup first, some constants are set up to reference the elements on the page to which we'll need access: the <video> into which the captured screen contents will be streamed, a box into which logged output will be drawn, and the start and stop buttons that will turn on and off capture of screen imagery.
... const videoelem = document.getelementbyid("video"); const logelem = document.getelementbyid("log"); const startelem = document.getelementbyid("start"); const stopelem = document.getelementbyid("stop"); // options for getdisplaymedia() var displaymediaoptions = { video: { cursor: "always" }, audio: false }; // set event listeners for the start and stop buttons startelem.addeventlistener("click", function(evt) { startcap...
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TouchEvent - Web APIs
Web › API › TouchEvent
touches are represented by the touch object; each touch is described by a position, size and shape, amount of pressure, and target element.
... touchevent.targettouchesread only a touchlist of all the touch objects that are both currently in contact with the touch surface and were also started on the same element that is the target of the event.
...the event's target will be the element in which the touch occurred.
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Touch events - Web APIs
Web › API › Touch events
create a canvas <canvas id="canvas" width="600" height="600" style="border:solid black 1px;"> your browser does not support canvas element.
... function startup() { var el = document.getelementbyid("canvas"); el.addeventlistener("touchstart", handlestart, false); el.addeventlistener("touchend", handleend, false); el.addeventlistener("touchcancel", handlecancel, false); el.addeventlistener("touchmove", handlemove, false); } document.addeventlistener("domcontentloaded", startup); this simply sets up all the event listeners for our <canvas> element so we can handle the touch events as they occur.
... function handlestart(evt) { evt.preventdefault(); console.log("touchstart."); var el = document.getelementbyid("canvas"); var ctx = el.getcontext("2d"); var touches = evt.changedtouches; for (var i = 0; i < touches.length; i++) { console.log("touchstart:" + i + "..."); ongoingtouches.push(copytouch(touches[i])); var color = colorfortouch(touches[i]); ctx.beginpath(); ctx.arc(touches[i].pagex, touches[i].pagey, 4, 0, 2 * math.pi, false); // a circle at the start ctx.fillstyle = color; ctx.fill(); console.log("touchstart:" + i...
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WebGLRenderingContext.getParameter() - Web APIs
Web › API › WebGLRenderingContext › getParameter
constant returned type description gl.active_texture glenum gl.aliased_line_width_range float32array (with 2 elements) gl.aliased_point_size_range float32array (with 2 elements) gl.alpha_bits glint gl.array_buffer_binding webglbuffer gl.blend glboolean gl.blend_color float32array (with 4 values) gl.blend_dst_alpha glenum gl.blend_dst_rgb glenum gl.blend_equation glenum gl.
... gl.depth_bits glint gl.depth_clear_value glfloat gl.depth_func glenum gl.depth_range float32array (with 2 elements) gl.depth_test glboolean gl.depth_writemask glboolean gl.dither glboolean gl.element_array_buffer_binding webglbuffer gl.framebuffer_binding webglframebuffer or null null corresponds to a binding to the default framebuffer.
... glint gl.max_renderbuffer_size glint gl.max_texture_image_units glint gl.max_texture_size glint gl.max_varying_vectors glint gl.max_vertex_attribs glint gl.max_vertex_texture_image_units glint gl.max_vertex_uniform_vectors glint gl.max_viewport_dims int32array (with 2 elements) gl.pack_alignment glint gl.polygon_offset_factor glfloat gl.polygon_offset_fill glboolean gl.polygon_offset_units glfloat gl.red_bits glint gl.renderbuffer_binding webglrenderbuffer or null see bindrenderbuffer.
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WebGLRenderingContext.texImage2D() - Web APIs
Web › API › WebGLRenderingContext › texImage2D
pixels); void gl.teximage2d(target, level, internalformat, format, type, htmlimageelement?
... pixels); void gl.teximage2d(target, level, internalformat, format, type, htmlcanvaselement?
... pixels); void gl.teximage2d(target, level, internalformat, format, type, htmlvideoelement?
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A basic 2D WebGL animation example - Web APIs
Web › API › WebGL API › Basic 2D animation example
let uscalingfactor; let uglobalcolor; let urotationvector; let avertexposition; // animation timing let previoustime = 0.0; let degreespersecond = 90.0; initializing the program is handled through a load event handler called startup(): window.addeventlistener("load", startup, false); function startup() { glcanvas = document.getelementbyid("glcanvas"); gl = glcanvas.getcontext("webgl"); const shaderset = [ { type: gl.vertex_shader, id: "vertex-shader" }, { type: gl.fragment_shader, id: "fragment-shader" } ]; shaderprogram = buildshaderprogram(shaderset); aspectratio = glcanvas.width/glcanvas.height; currentrotation = [0, 1]; currentscale = [1.0, aspectratio]; vertexarr...
...each function has a type (one of gl.vertex_shader or gl.fragment_shader) and an id (the id of the <script> element containing the shader's code).
...each of those objects includes, as mentioned before, the id of the <script> element the shader code is found in and the type of shader it is.
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Creating 3D objects using WebGL - Web APIs
Web › API › WebGL API › Tutorial › Creating 3D objects using WebGL
to do this efficiently, we're going to switch from drawing using the vertices directly by calling the gl.drawarrays() method to using the vertex array as a table, and referencing individual vertices in that table to define the positions of each face's vertices, by calling gl.drawelements().
... var colors = []; for (var j = 0; j < facecolors.length; ++j) { const c = facecolors[j]; // repeat each color four times for the four vertices of the face colors = colors.concat(c, c, c, c); } const colorbuffer = gl.createbuffer(); gl.bindbuffer(gl.array_buffer, colorbuffer); gl.bufferdata(gl.array_buffer, new float32array(colors), gl.static_draw); define the element array once the vertex arrays are generated, we need to build the element array.
... const indexbuffer = gl.createbuffer(); gl.bindbuffer(gl.element_array_buffer, indexbuffer); // this array defines each face as two triangles, using the // indices into the vertex array to specify each triangle's // position.
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A simple RTCDataChannel sample - Web APIs
Web › API › WebRTC API › Simple RTCDataChannel sample
in this example, we will open an rtcdatachannel connection linking two elements on the same page.
... function startup() { connectbutton = document.getelementbyid('connectbutton'); disconnectbutton = document.getelementbyid('disconnectbutton'); sendbutton = document.getelementbyid('sendbutton'); messageinputbox = document.getelementbyid('message'); receivebox = document.getelementbyid('receivebox'); // set event listeners for user interface widgets connectbutton.addeventlistener('click', connectpeers, false); disconnectbutton.addeventli...
...we grab references to all the page elements we'll need to access, then set event listeners on the three buttons.
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Web Video Text Tracks Format (WebVTT) - Web APIs
Web › API › WebVTT API
web video text tracks format (webvtt) is a format for displaying timed text tracks (such as subtitles or captions) using the <track> element.
... 3 00:02:25.000 --> 00:02:30.000 - ta en kopp styling webvtt cues you can style webvtt cues by looking for elements which match the ::cue pseudo-element.
... within site css video::cue { background-image: linear-gradient(to bottom, dimgray, lightgray); color: papayawhip; } video::cue(b) { color: peachpuff; } here, all video elements are styled to use a gray linear gradient as their backgrounds, with a foreground color of "papayawhip".
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Movement, orientation, and motion: A WebXR example - Web APIs
Web › API › WebXR Device API › Movement and motion
the last four variables declared are storage for references to the <div> elements into which we'll output the matrices when we want to show them to the user.
...the xrcompatible property is requested when calling getcontext() on the element to gain access to the webgl rendering context for the canvas.
... next, we add event handlers for the mousemove and element.contextmenu_event, but only if the allowmouserotation constant is true.
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Window.getDefaultComputedStyle() - Web APIs
Web › API › Window › getDefaultComputedStyle
the getdefaultcomputedstyle() method gives the default computed values of all the css properties of an element, ignoring author styling.
... syntax var style = window.getdefaultcomputedstyle(element [, pseudoelt]); parameters element the element for which to get the computed style.
... pseudoelt optional a string specifying the pseudo-element to match.
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Using XMLHttpRequest - Web APIs
Web › API › XMLHttpRequest › Using XMLHttpRequest
|*| https://www.gnu.org/licenses/gpl-3.0-standalone.html |*| |*| syntax: |*| |*| ajaxsubmit(htmlformelement); \*/ var ajaxsubmit = (function () { function ajaxsuccess () { /* console.log("ajaxsubmit - success!"); */ console.log(this.responsetext); /* you can get the serialized data through the "submitteddata" custom property: */ /* console.log(json.stringify(this.submitteddata)); */ } function submitdata (odata) { /* the ajax request...
...plainescape : escape; for (var nitem = 0; nitem < otarget.elements.length; nitem++) { ofield = otarget.elements[nitem]; if (!ofield.hasattribute("name")) { continue; } sfieldtype = ofield.nodename.touppercase() === "input" ?
.../* enctype is multipart/form-data */ "content-disposition: form-data; name=\"" + ofield.name + "\"\r\n\r\n" + ofield.value + "\r\n" : /* enctype is application/x-www-form-urlencoded or text/plain or method is get */ ffilter(ofield.name) + "=" + ffilter(ofield.value) ); } } processstatus(this); } return function (oformelement) { if (!oformelement.action) { return; } new submitrequest(oformelement); }; })(); </script> </head> <body> <h1>sending forms with pure ajax</h1> <h2>using the get method</h2> <form action="register.php" method="get" onsubmit="ajaxsubmit(this); return false;"> <fieldset> <legend>registration example</legend> <p> first name: <input type="text" name="firstname" /><br ...
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msRegionOverflow - Web APIs
Web › API › msRegionOverflow
syntax string = object.msregionoverflow values type:domstring overflow: the region element's content overflows the region's content box.
... fit: the region element's content fits into the region's content box.
... empty: the region element has no content and is empty.
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Using the aria-describedby attribute - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the aria-describedby attribute
description the aria-describedby attribute is used to indicate the ids of the elements that describe the object.
... the aria-describedby attribute is not used only for form elements; it is also used to associate static text with widgets, groups of elements, panes, regions that have a heading, definitions, and more.
... this attribute can be used with any typical html form element; it is not limited to elements that have an aria role assigned.
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ARIA: timer role - Accessibility
Web › Accessibility › ARIA › Roles › ARIA timer role
the timer role indicates to assistive technologies that an element is a numerical counter listing the amount of elapsed time from a starting point or the remaining time until an end point.
... <div role="timer" id="eggtimer">0</div> this defines this div element as a timer with no remaining time.
... aria-live elements with the role timer have an implicit aria-live value of off.
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ARIA: banner role - Accessibility
Web › Accessibility › ARIA › Roles › Banner Role
<div role="banner"> <img src="companylogo.svg" alt="my company name" /> <h1>title</h1> <h2>subtitle</h2> </div> by default, the html5 <header> element has an identical meaning to the banner landmark, unless it is a descendant of <aside>, <article>, <main>, <nav>, or <section>.
... description a banner landmark role converts the container element upon which it is applied into a header.
...if the header element technique is not being used for that banner, a declaration of role="banner" should be used to define a banner landmark to assistive technologies.
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ARIA: document role - Accessibility
Web › Accessibility › ARIA › Roles › Document Role
generally used in complex composite widgets or applications, the document role can inform assistive technologies to switch context to a reading mode: the document role tells assistive technologies with reading or browse modes to use the document mode to read the content contained within this element.
... because ats with reading mode default to that mode for all elements except for those with a widget or application role set, document role is only useful for focusable elements within a widget or application that should be read as static rich text.
... adding role="document" and tabindex="0" to the element containing the text within a widget enables the screen reader user to press the tab key to place focus on the document element and read the text with the screen reader's reading cursor.
...And 3 more matches
ARIA: Region role - Accessibility
Web › Accessibility › ARIA › Roles › Region role
every element with a region role should include a label that describes the purpose of the content in the region, preferably with an aria-labelledby referencing a visible header.
... using the <section> element will automatically communicate a section has a role of region if it is given an accessible name.
... developers should always prefer using the correct semantic html element, in this case <section>, over using aria.
...And 3 more matches
Alerts - Accessibility
Web › Accessibility › ARIA › forms › alerts
below is example javascript code which could be inserted above the closing “head” tag: <script type="application/javascript"> function removeoldalert() { var oldalert = document.getelementbyid("alert"); if (oldalert){ document.body.removechild(oldalert); } } function addalert(amsg) { removeoldalert(); var newalert = document.createelement("div"); newalert.setattribute("role", "alert"); newalert.setattribute("id", "alert"); var msg = document.createtextnode(amsg); newalert.appendchild(msg); document.body.appendchild(newalert); } function checkv...
...alidity(aid, asearchterm, amsg) { var elem = document.getelementbyid(aid); var invalid = (elem.value.indexof(asearchterm) < 0); if (invalid) { elem.setattribute("aria-invalid", "true"); addalert(amsg); } else { elem.setattribute("aria-invalid", "false"); removeoldalert(); } } </script> the checkvalidity function the primary method in javascript used for form validation is the checkvalidity function.
... if invalid, the function does two things: it sets the element’s aria-invalid attribute to “true”, which will indicate to screen readers that there is invalid content in here.
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Understandable - Accessibility
Web › Accessibility › Understanding WCAG › Understandable
the simplest way to achieve this is to set the lang attribute on the page's <html> element, giving it a value equal to the language code that best represents the language the page is written in.
... 3.1.2 language of parts (aa) in cases where the content of a page includes words or phrases that are in a different language to the primary language, use the lang attribute on an element wrapped around the term in question (e.g.
... a <span> if no semantic element is available) to set an appropriate language for it.
...And 3 more matches
-moz-context-properties - CSS: Cascading Style Sheets
Web › CSS › -moz-context-properties
the -moz-context-properties property can be used within privileged contexts in firefox to share the values of specified properties of the element with a child svg image.
... if you reference an svg image in a webpage (such as with the <img> element or as a background image), the svg image can coordinate with the embedding element (its context) to have the image adopt property values set on the embedding element.
... to do this the embedding element needs to list the properties that are to be made available to the image by listing them as values of the -moz-context-properties property, and the image needs to opt in to using those properties by using values such as the context-fill value.
...And 3 more matches
-moz-orient - CSS: Cascading Style Sheets
Web › CSS › -moz-orient
the -moz-orient css property specifies the orientation of the element to which it's applied.
... values inline the element is rendered in the same direction as the axis of the text: horizontally for horizontal writing modes, vertically for vertical writing modes.
... block the element is rendered orthogonally to the axis of the text: vertically for horizontal writing modes, horizontal for vertical writing modes.
...And 3 more matches
-webkit-box-reflect - CSS: Cascading Style Sheets
Web › CSS › -webkit-box-reflect
the -webkit-box-reflect css property lets you reflect the content of an element in one specific direction.
...to achieve reflection on the web, the standard way is to use the css element() function.
... formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax [ above | below | right | left ]?
...And 3 more matches
::placeholder - CSS: Cascading Style Sheets
Web › CSS › ::placeholder
the ::placeholder css pseudo-element represents the placeholder text in an <input> or <textarea> element.
... ::placeholder { color: blue; font-size: 1.5em; } only the subset of css properties that apply to the ::first-line pseudo-element can be used in a rule using ::placeholder in its selector.
...placeholder text will also disappear when a person enters content into an <input> element.
...And 3 more matches
:defined - CSS: Cascading Style Sheets
Web › CSS › :defined
the :defined css pseudo-class represents any element that has been defined.
... this includes any standard element built in to the browser, and custom elements that have been successfully defined (i.e.
... with the customelementregistry.define() method).
...And 3 more matches
Box alignment for block, absolutely positioned and table layout - CSS: Cascading Style Sheets
Web › CSS › CSS Box Alignment › Box Alignment In Block Abspos Tables
in this page we explore how box alignment works in the context of block layout, including floated, positioned, and table elements.
... this property does not apply to floated elements or table cells.
... absolutely positioned elements the alignment container is the positioned block, accounting for the offset values of top, left, bottom, and right.
...And 3 more matches
CSS Flow Layout - CSS: Cascading Style Sheets
Web › CSS › CSS Flow Layout
normal flow, or flow layout, is the way that block and inline elements are displayed on a page before any changes are made to their layout.
... in normal flow, inline elements display in the inline direction, that is in the direction words are displayed in a sentence according to the writing mode of the document.
... block elements display one after the other, as paragraphs do in the writing mode of that document.
...And 3 more matches
Basic Concepts of grid layout - CSS: Cascading Style Sheets
Web › CSS › CSS Grid Layout › Basic Concepts of Grid Layout
grids can be used to lay out major page areas or small user interface elements.
...elements can be placed onto the grid within these column and row lines.
... the grid container we create a grid container by declaring display: grid or display: inline-grid on an element.
...And 3 more matches
Overview of CSS Shapes - CSS: Cascading Style Sheets
Web › CSS › CSS Shapes › Overview of CSS Shapes
as in this level of the specification an element has to be floated in order to apply <basic-shape> to it; this has the side-effect of creating a simple fallback for many cases.
... using generated content as the floated item in the examples above we have used images or a visible element to define the shape, meaning that you can see the shape on the page.
...that could be a redundant element inserted into the document, an empty <div> or <span> perhaps, but our preference is to use generated content.
...And 3 more matches
Syntax - CSS: Cascading Style Sheets
Web › CSS › Syntax
the basic goal of the cascading stylesheet (css) language is to allow a browser engine to paint elements of the page with specific features, like colors, positioning, or decorations.
...a property and value pair is called a declaration, and any css engine calculates which declarations apply to every single element of a page in order to appropriately lay it out, and to style it.
... css rulesets if style sheets could only apply a declaration to each element of a web page, they would be pretty useless.
...And 3 more matches
Cubic Bezier Generator - CSS: Cascading Style Sheets
Web › CSS › Tools › Cubic Bezier Generator
"updatecanvas();return true;" type="text" maxlength=6 id="x2" value="0.14" class='field'> <label for="y2">y2 = </label><input onchange="updatecanvas();return true;" type="text" maxlength=6 id="y2" value="0.53" class='field'> <br> <output id="output">log</output> </form> </html> .field { width: 40px; } function updatecanvas() { var x1 = document.getelementbyid('x1').value; var y1 = document.getelementbyid('y1').value; var x2 = document.getelementbyid('x2').value; var y2 = document.getelementbyid('y2').value; drawbeziercurve(x1, y1, x2, y2); } const radius = 4; // place needed to draw the rulers const rulers = 30.5; const margin = 10.5; const basic_scale_size = 5; // size of 0.1 tick on the rulers var scaling; //limitation: scaling...
... is computed once: if canvas.height/canvas.width change it won't be recalculated var dragsm = 0; // drag state machine: 0 = nodrag, others = object being dragged function initcanvas() { // get the canvas element using the dom var canvas = document.getelementbyid('bezier'); // make sure we don't execute when canvas isn't supported if (canvas.getcontext) { // use getcontext to use the canvas for drawing var ctx = canvas.getcontext('2d'); scaling = math.min(canvas.height - rulers - margin, canvas.width - rulers - margin); canvas.onmousedown = mousedown; canvas.onmouseup = mouseup; } else { alert('you need safari or firefox 1.5+ to see this demo.'); } } function cx(x) { return x * scaling + rulers; } function reversex(x...
...result + 0.5 : result; } function drawbeziercurve(x1, y1, x2, y2) { // get the canvas element using the dom var canvas = document.getelementbyid('bezier'); // make sure we don't execute when canvas isn't supported if (canvas.getcontext) { // use getcontext to use the canvas for drawing var ctx = canvas.getcontext('2d'); // clear canvas ctx.clearrect(0, 0, canvas.width, canvas.height); // draw the rulers ctx.beginpath(); ...
...And 3 more matches
background-size - CSS: Cascading Style Sheets
Web › CSS › background-size
the background-size css property sets the size of the element's background image.
...if the proportions of the image differ from the element, it is cropped either vertically or horizontally so that no empty space remains.
... background images created with the element() function use the intrinsic dimensions and proportions of the generating element.
...And 3 more matches
border-image-outset - CSS: Cascading Style Sheets
Web › CSS › border-image-outset
the border-image-outset css property sets the distance by which an element's border image is set out from its border box.
... the parts of the border image that are rendered outside the element's border box with border-image-outset do not trigger overflow scrollbars and don't capture mouse events.
... <number> the size of the border-image outset as a multiple of the element's corresponding border-widths.
...And 3 more matches
clamp() - CSS: Cascading Style Sheets
Web › CSS › clamp
the <body> element's width is set as min(1000px, calc(70% + 100px)).
... the <p> element's font-size is set as max(1.2rem, 1.2vw).
... the <h1> element's font-size is set as clamp(1.8rem, 2.5vw, 2.8rem).
...And 3 more matches
clip - CSS: Cascading Style Sheets
Web › CSS › clip
the clip css property defines a visible portion of an element.
... the clip property applies only to absolutely positioned elements — that is, elements with position:absolute or position:fixed.
...if any side's value is auto, the element is clipped to that side's inside border edge.
...And 3 more matches
direction - CSS: Cascading Style Sheets
Web › CSS › direction
the property sets the base text direction of block-level elements and the direction of embeddings created by the unicode-bidi property.
... it also sets the default alignment of text, block-level elements, and the direction that cells flow within a table row.
... syntax /* keyword values */ direction: ltr; direction: rtl; /* global values */ direction: inherit; direction: initial; direction: unset; values ltr text and other elements go from left to right.
...And 3 more matches
<image> - CSS: Cascading Style Sheets
Web › CSS › image
syntax the <image> data type can be represented with any of the following: an image denoted by the <url> data type a <gradient> data type a part of the webpage, defined by the element() function an image, image fragment or solid patch of color, defined by the image() function a blending of two or more images defined by the cross-fade() function.
... css determines an object's concrete size using (1) its intrinsic dimensions; (2) its specified size, defined by css properties like width, height, or background-size; and (3) its default size, determined by the kind of property the image is used with: kind of object (css property) default object size background-image the size of the element's background positioning area list-style-image the size of a 1em character border-image-source the size of the element's border image area cursor the browser-defined size matching the usual cursor size on the client's system mask-image ?
...if supported, the browser-defined size matching the usual cursor size on the client's system content for a pseudo-element (::after/::before) a 300px × 150px rectangle the concrete object size is calculated using the following algorithm: if the specified size defines both the width and the height, these values are used as the concrete object size.
...And 3 more matches
image() - CSS: Cascading Style Sheets
Web › CSS › imagefunction
disambiguation: image(), the htmlimageelement constructor.
...if included, and the image is used on an element with opposite directionality, the image will be flipped horizontally in horizontal writing modes.
...the syntax looks like so: background-image: image('myimage.webp#xywh=0,20,40,60'); the background image of the element will be the portion of the image myimage.webp that starts at the coordinate 0px, 20px (the top left hand corner) and is 40px wide and 60px tall.
...And 3 more matches
list-style-position - CSS: Cascading Style Sheets
Web › CSS › list-style-position
note: this property is applied to list items, i.e., elements with display: list-item;.
... by default this includes <li> elements.
... because this property is inherited, it can be set on the parent element (normally <ol> or <ul>) to let it apply to all list items.
...And 3 more matches
padding - CSS: Cascading Style Sheets
Web › CSS › padding
the padding css shorthand property sets the padding area on all four sides of an element at once.
... an element's padding area is the space between its content and its border.
... note: padding creates extra space within an element.
...And 3 more matches
shape-outside - CSS: Cascading Style Sheets
Web › CSS › shape-outside
,1,1,1,1,0.3 c1,0.7,0.5,1,0.5,1 z'); /* <url> value */ shape-outside: url(image.png); /* <gradient> value */ shape-outside: linear-gradient(45deg, rgba(255, 255, 255, 0) 150px, red 150px); /* global values */ shape-outside: initial; shape-outside: inherit; shape-outside: unset; the shape-outside property is specified using the values from the list below, which define the float area for float elements.
... the float area determines the shape around which inline content (float elements) wrap.
...inline content wraps around the element's margin box, like usual.
...And 3 more matches
transform - CSS: Cascading Style Sheets
Web › CSS › transform
the transform css property lets you rotate, scale, skew, or translate an element.
...in that case, the element will act as a containing block for any position: fixed; or position: absolute; elements that it contains.
... only transformable elements can be transformed.
...And 3 more matches
Index - Developer guides
Web › Guide › Index
6 audio and video delivery audio, guide, html, html5, media, video whether we are dealing with pre-recorded audio files or live streams, the mechanism for making them available through the browser's <audio> and <video> elements remains pretty much the same.
... 7 adding captions and subtitles to html5 video html5, media, webvtt, captions, subtitles, track in other articles we looked at how to build a cross browser video player using the htmlmediaelement and window.fullscreen apis, and also at how to style the player.
... this article will take the same player and show how to add captions and subtitles to it, using the webvtt format and the <track> element.
...And 3 more matches
HTML attribute: crossorigin - HTML: Hypertext Markup Language
Web › HTML › Attributes › crossorigin
the crossorigin attribute, valid on the <audio>, <img>, <link>, <script>, and <video> elements, provides support for cors, defining how the element handles crossorigin requests, thereby enabling the configuration of the cors requests for the element's fetched data.
... depending on the element, the attribute can be a cors settings attribute.
... the crossorigin content attribute on media elements is a cors settings attribute.
...And 3 more matches
<wbr> - HTML: Hypertext Markup Language
Web › HTML › Element › wbr
the html <wbr> element represents a word break opportunity—a position within text where the browser may optionally break a line, though its line-breaking rules would not otherwise create a break at that location.
... permitted content empty tag omission it is an empty element; it must have a start tag, but must not have an end tag.
... permitted parents any element that accepts phrasing content.
...And 3 more matches
dir - HTML: Hypertext Markup Language
Web › HTML › Global attributes › dir
the dir global attribute is an enumerated attribute that indicates the directionality of the element's text.
...it uses a basic algorithm as it parses the characters inside the element until it finds a character with a strong directionality, then applies that directionality to the whole element.
... usage notes: this attribute is mandatory for the <bdo> element where it has a different semantic meaning.
...And 3 more matches
List of default Accept values - HTTP
Web › HTTP › Content negotiation › List of default Accept values
this is typically used for requests initiated via the address bar of a browser, or via an html <a> element.
... edge text/html, application/xhtml+xml, image/jxr, */* opera text/html, application/xml;q=0.9, application/xhtml+xml, image/png, image/webp, image/jpeg, image/gif, image/x-xbitmap, */*;q=0.1 values for an image when requesting an image, like through an html <img> element, user-agent often sets a specific list of media types to be welcomed.
... chrome image/webp,image/apng,image/*,*/*;q=0.8 source internet explorer 8 or earlier */* see ie and the accept header (ieinternals' msdn blog) internet explorer 9 image/png,image/svg+xml,image/*;q=0.8, */*;q=0.5 see fiddler is better with internet explorer 9 (ieinternals' msdn blog) values for a video when a video is requested, via the <video> html element, most browsers use specific values.
...And 3 more matches
CSP: object-src - HTTP
Web › HTTP › Headers › Content-Security-Policy › object-src
the http content-security-policy object-src directive specifies valid sources for the <object>, <embed>, and <applet> elements.
... to set allowed types for <object>, <embed>, and <applet> elements, use the plugin-types directive.
... elements controlled by object-src are perhaps coincidentally considered legacy html elements and aren't receiving new standardized features (such as the security attributes sandbox or allow for <iframe>).
...And 3 more matches
JavaScript data types and data structures - JavaScript
Web › JavaScript › Data structures
it is a set of "elements" of 16-bit unsigned integer values.
... each element in the string occupies a position in the string.
... the first element is at index 0, the next at index 1, and so on.
...And 3 more matches
Expressions and operators - JavaScript
Web › JavaScript › Guide › Expressions and Operators
for example, if a is a 2-dimensional array with 10 elements on a side, the following code uses the comma operator to update two variables at once.
... the code prints the values of the diagonal elements in the array: var x = [0,1,2,3,4,5,6,7,8,9] var a = [x, x, x, x, x]; for (var i = 0, j = 9; i <= j; i++, j--) // ^ console.log('a[' + i + '][' + j + ']= ' + a[i][j]); unary operators a unary operation is an operation with only one operand.
...2; // implicitly creates window.x var y = 43; var myobj = {h: 4}; // create object with property h delete x; // returns true (can delete if created implicitly) delete y; // returns false (cannot delete if declared with var) delete math.pi; // returns false (cannot delete non-configurable properties) delete myobj.h; // returns true (can delete user-defined properties) deleting array elements since arrays are just objects, it's technically possible to delete elements from them.
...And 3 more matches
Loops and iteration - JavaScript
Web › JavaScript › Guide › Loops and iteration
example in the example below, the function contains a for statement that counts the number of selected options in a scrolling list (a <select> element that allows multiple selections).
...it checks that i is less than the number of options in the <select> element, performs the succeeding if statement, and increments i by after each pass through the loop.
...ical</option> <option>opera</option> </select> </p> <p><input id="btn" type="button" value="how many are selected?" /></p> </form> <script> function howmany(selectobject) { let numberselected = 0; for (let i = 0; i < selectobject.options.length; i++) { if (selectobject.options[i].selected) { numberselected++; } } return numberselected; } let btn = document.getelementbyid('btn'); btn.addeventlistener('click', function() { alert('number of options selected: ' + howmany(document.selectform.musictypes)); }); </script> do...while statement the do...while statement repeats until a specified condition evaluates to false.
...And 3 more matches
Memory Management - JavaScript
Web › JavaScript › Memory Management
memory for a number var s = 'azerty'; // allocates memory for a string var o = { a: 1, b: null }; // allocates memory for an object and contained values // (like object) allocates memory for the array and // contained values var a = [1, null, 'abra']; function f(a) { return a + 2; } // allocates a function (which is a callable object) // function expressions also allocate an object someelement.addeventlistener('click', function() { someelement.style.backgroundcolor = 'blue'; }, false); allocation via function calls some function calls result in object allocation.
... var d = new date(); // allocates a date object var e = document.createelement('div'); // allocates a dom element some methods allocate new values or objects: var s = 'azerty'; var s2 = s.substr(0, 3); // s2 is a new string // since strings are immutable values, // javascript may decide to not allocate memory, // but just store the [0, 3] range.
... var a = ['ouais ouais', 'nan nan']; var a2 = ['generation', 'nan nan']; var a3 = a.concat(a2); // new array with 4 elements being // the concatenation of a and a2 elements.
...And 3 more matches
Array.prototype.reduce() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › Reduce
the reduce() method executes a reducer function (that you provide) on each element of the array, resulting in single output value.
... syntax arr.reduce(callback( accumulator, currentvalue, [, index[, array]] )[, initialvalue]) parameters callback a function to execute on each element in the array (except for the first, if no initialvalue is supplied).
... currentvalue the current element being processed in the array.
...And 3 more matches
Array.prototype.concat() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › concat
description the concat method creates a new array consisting of the elements in the object on which it is called, followed in order by, for each argument, the elements of that argument (if the argument is an array) or the argument itself (if the argument is not an array).
... the concat method does not alter this or any of the arrays provided as arguments but instead returns a shallow copy that contains copies of the same elements combined from the original arrays.
... elements of the original arrays are copied into the new array as follows: object references (and not the actual object): concat copies object references into the new array.
...And 3 more matches
Array.prototype.flatMap() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › flatMap
the flatmap() method first maps each element using a mapping function, then flattens the result into a new array.
... syntax var new_array = arr.flatmap(function callback(currentvalue[, index[, array]]) { // return element for new_array }[, thisarg]) parameters callback function that produces an element of the new array, taking three arguments: currentvalue the current element being processed in the array.
... indexoptional the index of the current element being processed in the array.
...And 3 more matches
Array.prototype.pop() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › pop
the pop() method removes the last element from an array and returns that element.
... syntax arrname.pop() return value the removed element from the array; undefined if the array is empty.
... description the pop method removes the last element from an array and returns that value to the caller.
...And 3 more matches
Map - JavaScript
Web › JavaScript › Reference › Global Objects › Map
description a map object iterates its elements in insertion order — a for...of loop returns an array of [key, value] for each iteration.
... map.prototype.delete(key) returns true if an element in the map object existed and has been removed, or false if the element does not exist.
... iteration methods map.prototype[@@iterator]() returns a new iterator object that contains an array of [key, value] for each element in the map object in insertion order.
...And 3 more matches
TypedArray.prototype.slice() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › slice
slice(-2) extracts the last two elements in the sequence.
... for example, slice(1,4) extracts the second element through the fourth element (elements indexed 1, 2, and 3).
...slice(2,-1) extracts the third element through the second-to-last element in the sequence.
...And 3 more matches
Property accessors - JavaScript
Web › JavaScript › Reference › Operators › Property Accessors
const variable = object.property_name; object.property_name = value; const object = {}; object.$1 = 'foo'; console.log(object.$1); // 'foo' object.1 = 'bar'; // syntaxerror console.log(object.1); // syntaxerror here, the method named createelement is retrieved from document and is called.
... document.createelement('pre') if you use a method for a numeric literal, and the numeric literal has no exponent and no decimal point, you should leave white-space(s) before the dot preceding the method call, so that the dot is not interpreted as a decimal point.
... document['createelement']('pre') a space before bracket notation is allowed.
...And 3 more matches
<math> - MathML
Web › MathML › Element › math
the top-level element in mathml is <math>.
...in addition you must not nest a second <math> element in another, but you can have an arbitrary number of other child elements in it.
... attributes in addition to the following attributes, the <math> element accepts any attributes of the <mstyle> element.
...And 3 more matches
<mo> - MathML
Web › MathML › Element › mo
the mathml <mo> element represents an operator in a broad sense.
... besides operators in strict mathematical meaning, this element also includes "operators" like parentheses, separators like comma and semicolon, or "absolute value" bars.
...(it is the default value if the operator is the first argument in a <mrow> element with more than one argument.) infix, for separators.
...And 3 more matches
<mtable> - MathML
Web › MathML › Element › mtable
the mathml <mtable> element allows you to create tables or matrices.
... inside a <mtable> only <mtr> and <mtd> elements may appear.
... these elements are similar to <table> , <tr> and <td> elements of html.
...And 3 more matches
Web video codec guide - Web media technologies
Web › Media › Formats › Video codecs
codec name (short) full codec name container support av1 aomedia video 1 mp4, webm avc (h.264) advanced video coding 3gp, mp4, webm h.263 h.263 video 3gp hevc (h.265) high efficiency video coding mp4 mp4v-es mpeg-4 video elemental stream 3gp, mp4 mpeg-1 mpeg-1 part 2 visual mpeg, quicktime mpeg-2 mpeg-2 part 2 visual mp4, mpeg, quicktime theora theora ogg vp8 video processor 8 3gp, ogg, webm vp9 video processor 9 mp4, ogg, webm factors affecting the encoded video as is the case with any encoder, there are two basic groups of factors aff...
...av1 is fully royalty-free and is designed for use by both the <video> element and by webrtc.
... for example, each coding tree unit (ctu)—similar to the macroblock used in previous codecs—consists of a tree of luma values for each sample as well as a tree of chroma values for each chroma sample used in the same coding tree unit, as well as any required syntax elements.
...And 3 more matches
Media - Progressive web apps (PWAs)
Web › Progressive web apps › Responsive › Media types
in the markup language, the navigation area's parent element has the id nav-area.
... (in html5, this can be marked up with the <nav> element instead of <div> with an id attribute.) when printing the document, the navigation area has no purpose.
...for example, in html, you have the option to specify the media type with a media attribute in the link element.
...And 3 more matches
Structural overview of progressive web apps - Progressive web apps (PWAs)
Web › Progressive web apps › Structural overview
it's different with html, as the browser is actually streaming the data already and you can see when the elements are loaded and rendered on the website.
...the <body> is split into the <header> (which displays an image) and the body of the app, which is found inside a <main> element.
... the app displays its title, a description, and then a place for the app content to be shown (a <section> element with the id content.
...And 3 more matches
Applying SVG effects to HTML content - SVG: Scalable Vector Graphics
Web › SVG › Applying SVG effects to HTML content
applying the svg effect to (x)html is accomplished by assigning the target class defined above to an element, like this: <p class="target" style="background:lime;"> lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
...the clip path can be assigned to any element with the target class.
...for example, you can resize the circle in the clip path established above: function toggleradius() { var circle = document.getelementbyid("circle"); circle.r.baseval.value = 0.40 - circle.r.baseval.value; } example: filtering this demonstrates applying a filter to html content using svg.
...And 3 more matches
SVG Core Attributes - SVG: Scalable Vector Graphics
Web › SVG › Attribute › Core
the svg core attributes are all the common attributes that can be specified on any svg element.
...its purpose is to identify the element when linking (using a fragment identifier), scripting, or styling (with css).
... value: any valid id string; animatable: no lang participates in defining the language of the element, the language that non-editable elements are written in or the language that editable elements should be written in.
...And 3 more matches
enable-background - SVG: Scalable Vector Graphics
Web › SVG › Attribute › enable-background
as a presentation attribute, it can be applied to any element but it has effect only on the following eleven elements: <a>, <defs>, <glyph>, <g>, <marker>, <mask>, <missing-glyph>, <pattern>, <svg>, <switch>, and <symbol> context notes value accumulate | new [ <x> <y> <width> <height> ]?
... default value accumulate animatable no accumulate if an ancestor container element has a property value of enable-background: new, then all graphics elements within the current container element are rendered both onto the parent container elementʼs background image canvas and onto the target device.
... otherwise, there is no current background image canvas, so graphics elements are only rendered onto the target device.
...And 3 more matches
gradientUnits - SVG: Scalable Vector Graphics
Web › SVG › Attribute › gradientUnits
the gradientunits attribute defines the coordinate system used for attributes specified on the gradient elements.
... two elements are using this attribute: <lineargradient> and <radialgradient> lineargradient for <lineargradient>, gradientunits defines the coordinate system used for the attributes x1, y1, x2, and y2.
... value userspaceonuse | objectboundingbox default value objectboundingbox animatable yes userspaceonuse this value indicates that the attributes represent values in the coordinate system that results from taking the current user coordinate system in place at the time when the gradient element is referenced (i.e., the user coordinate system for the element referencing the gradient element via a fill or stroke property) and then applying the transform specified by attribute gradienttransform.
...And 3 more matches
lang - SVG: Scalable Vector Graphics
Web › SVG › Attribute › lang
the lang attribute specifies the primary language used in contents and attributes containing text content of particular elements.
... in svg 1.1 there was a lang attribute defined with a different meaning and only applying to <glyph> elements.
... all elements are using this attribute.
...And 3 more matches
Content type - SVG: Scalable Vector Graphics
Web › SVG › Content type
in svg 1.1, an icc color specification is given by a name, which references a <color-profile> element, and one or more color component values.
...for example, an svg file called somedrawing.svg located at http://example.com might have the following iri: http://example.com/somedrawing.svg an iri can also address a particular element within an xml document by including an iri fragment identifier as part of the iri.
...for example, the following iri can be used to specify the element whose id is "lamppost" within file somedrawing.svg: http://example.com/somedrawing.svg#lamppost iris are used in the xlink:href attribute.
...And 3 more matches
<clipPath> - SVG: Scalable Vector Graphics
Web › SVG › Element › clipPath
the <clippath> svg element defines a clipping path, to be used by the clip-path property.
...*/ @keyframes openyourheart {from {r: 0} to {r: 60px}} #myclip circle { animation: openyourheart 15s infinite; } a clipping path is conceptually equivalent to a custom viewport for the referencing element.
... thus, it affects the rendering of an element, but not the element's inherent geometry.
...And 3 more matches
<defs> - SVG: Scalable Vector Graphics
Web › SVG › Element › defs
the <defs> element is used to store graphical objects that will be used at a later time.
... objects created inside a <defs> element are not rendered directly.
... to display them you have to reference them (with a <use> element for example).
...And 3 more matches
<desc> - SVG: Scalable Vector Graphics
Web › SVG › Element › desc
the <desc> element provides an accessible, long-text description of any svg container element or graphics element.
... text in a <desc> element is not rendered as part of the graphic.
... if the element can be described by visible text, it is possible to reference that text with the aria-describedby attribute.
...And 3 more matches
<linearGradient> - SVG: Scalable Vector Graphics
Web › SVG › Element › linearGradient
the <lineargradient> element lets authors define linear gradients that can be applied to fill or stroke of graphical elements.
... don't be confused with css linear-gradient() as css gradients can only apply to html elements where svg gradient can only apply to svg elements.
... value type: <transform-list> ; default value: identity transform; animatable: yes href this attribute defines a reference to another <lineargradient> element that will be used as a template.
...And 3 more matches
<symbol> - SVG: Scalable Vector Graphics
Web › SVG › Element › symbol
the <symbol> element is used to define graphical template objects which can be instantiated by a <use> element.
... the use of symbol elements for graphics that are used multiple times in the same document adds structure and semantics.
... value type: <length>|<percentage> ; default value: 0; animatable: yes global attributes core attributes most notably: id styling attributes class, style event attributes global event attributes, document element event attributes, graphical event attributes presentation attributes most notably: clip-path, clip-rule, color, color-interpolation, color-rendering, cursor, display, fill, fill-opacity, fill-rule, filter, mask, opacity, pointer-events, shape-rendering, stroke, stroke-dasharray, stroke-dashoffset, stroke-linecap, stroke-linejoin, stroke-miterlimit, stroke-opacity, stroke-width, transform, vecto...
...And 3 more matches
<text> - SVG: Scalable Vector Graphics
Web › SVG › Element › text
the svg <text> element draws a graphics element consisting of text.
... it's possible to apply a gradient, pattern, clipping path, mask, or filter to <text>, like any other svg graphics element.
... if text is included in svg not inside of a <text> element, it is not rendered.
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Axes - XPath
Web › XPath › Axes
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes there are thirteen different axes in the xpath specification.
...only elements have attributes.
...since only the root node or element nodes have children, any other use will select nothing.
...And 3 more matches
Content Scripts - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Guides › Content Scripts
it takes one of: "start": load the scripts immediately after the document element for the page is inserted into the dom.
... for example, this content script will fail with the error "themessage is not defined": var themessage = "hello from content script!"; anelement.setattribute("onclick", "alert(themessage);"); second, if you define an event listener by direct assignment to a global event handler like onclick, then the assignment might be overridden by the page.
...on most pages, but will fail on pages which also assign to onclick: <html> <head> </head> <body> <script> window.onclick = function() { window.alert("it's my click now!"); } </script> </body> </html> for these reasons, it's better to add event listeners using addeventlistener(), defining the listener as a function: var themessage = "hello from content script!"; anelement.onclick = function() { alert(themessage); }; anotherelement.addeventlistener("click", function() { alert(themessage); }); communicating with the add-on to enable add-on scripts and content scripts to communicate with each other, each end of the conversation has access to a port object.
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widget - Archive of obsolete content
Archive › Add-ons › Add-on SDK › High-Level APIs › widget
next, we write a content script that listens for click events on each icon and sends the corresponding message to the main add-on code: var play_button = document.getelementbyid("play-button"); play_button.onclick = function() { self.port.emit("play"); } var pause_button = document.getelementbyid("pause-button"); pause_button.onclick = function() { self.port.emit("pause"); } var stop_button = document.getelementbyid("stop-button"); stop_button.onclick = function() { self.port.emit("stop"); } we save this file in the add-on's data directory as "button-script.
... first, in the content script, change self to addon, and wrap it in a function: function init() { var play_button = document.getelementbyid("play-button"); play_button.onclick = function() { addon.port.emit("play"); } var pause_button = document.getelementbyid("pause-button"); pause_button.onclick = function() { addon.port.emit("pause"); } var stop_button = document.getelementbyid("stop-button"); stop_button.onclick = function() { addon.port.emit("stop"); } } next, add a script tag to reference "but...
...this may take one of the following values: "start": load content scripts immediately after the document element for the widget is inserted into the dom, but before the dom content itself has been loaded "ready": load content scripts once dom content has been loaded, corresponding to the domcontentloaded event "end": load content scripts once all the content (dom, js, css, images) for the widget has been loaded, at the time the window.onload event fires this property is optional and defa...
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util/list - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › util list
globals constructors list(element1, element2, ...) constructor can takes any number of elements and creates an instance of list populated with the specified elements.
... parameters element1 : object|string|number element2 : object|string|number ...
... removelistitem(list, item) function removes an item from a list list an ordered collection (also known as a sequence) disallowing duplicate elements.
...And 2 more matches
Overview - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Tutorials › Annotator › Overview
the selector enables the user to choose an element to annotate.
... it identifies page elements which are eligible for annotation, highlights them on mouseover, and tells the main add-on code when the user clicks a highlighted element.
... the matcher is responsible for finding annotated elements: it is initialized with the list of annotations and searches web pages for the elements they are associated with.
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Examples and demos from articles - Archive of obsolete content
Archive › Add-ons › Code snippets › From articles
determine if an element has been totally scrolled [html] this example shows how to determine whether a user has completely scrolled an element or not.
...[article] pure-css tooltips [html] this shows the use of the ::after pseudo-element in conjunction with the attr() css expression and a data-descr custom data attribute to create a pure-css, glossary-like tooltip.
... [article] pure-css lightbox [html] the :target pseudo-class is useful to switch on/off some invisible elements.
...And 2 more matches
SVG General - Archive of obsolete content
Archive › Add-ons › Code snippets › SVG General
svg template here is a basic markup template to start building an svg document: <svg xmlns="http://www.w3.org/2000/svg"> <!-- svg elements go here --> </svg> note: it is recommended that you do not use dtd's with svg documents.
... dynamic scripting helper this little helper script can be used to simplify creation of svg elements in script.
... svg requires you to use setattributens to add attributes to a newly created svg dom element.
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Appendix C: Avoiding using eval in Add-ons - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › Appendix C: Avoid using eval in Add-ons
// do not use eval(document.getelementbyid("mymenu").getattribute("oncommand")); eval(document.getelementbyid("mylabel").getattribute("onclick")); alternative: dispatch real events dispatching real events has the added bonus that all other event listeners for that element (and the corresponding bubbling/capturing chain) will fire as well, so this method will have the closed resemblance to a real user event.
... // fake a command event var event = document.createevent("events"); event.initevent("command", true, true); document.getelementbyid("mymenu").dispatchevent(event); // fake a mouse click var mouseevent = document.createevent("mouseevents"); event.initmouseevent("click", true, true, window, 0, 0, 0, 0, 0, false, false, false, false, 0, null); document.getelementbyid("mylabel").dispatchevent(mouseevent); please see the corresponding documentation on how to use and initialize particular event types.
... alternative: element.click() xul and html elements have a pre-defined .click() method that will fire a synthesized click event.
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Intercepting Page Loads - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › Intercepting Page Loads
this._loadhandler = function() {that._onpageload(); }; gbrowser.addeventlistener("load", this._loadhandler, true); gbrowser is a global object that corresponds to the tabbrowser element in the main browser window.
... if (doc.defaultview.frameelement) { // frame within a tab was loaded.
... // find the root document: while (doc.defaultview.frameelement) { doc = doc.defaultview.frameelement.ownerdocument; } } } } the second if validation is necessary if you need to make a distinction for html documents being loaded in inner page frames.
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Index of archived content - Archive of obsolete content
Archive › Index of archived content
dows and dialogs appendix a: add-on performance appendix b: install and uninstall scripts appendix c: avoiding using eval in add-ons appendix d: loading scripts appendix e: dom building and insertion (html & xul) appendix f: monitoring dom changes connecting to remote content custom xul elements with xbl getting started with firefox extensions handling preferences intercepting page loads introduction javascript object management local storage mozilla documentation roadmap observer notifications setting up a development environment the box model ...
...pt generators in firefox window.importdialog() writing javascript for xhtml xforms building mozilla xforms community developing mozilla xforms implementation status mozilla xforms specials mozilla xforms user interface xforms alert element xforms group element xforms help element xforms hint element xforms input element xforms label element xforms message element xforms output element xforms range element xforms repeat element xforms secret element xforms select element ...
... xforms select1 element xforms submit element xforms switch module xforms textarea element xforms trigger element xforms upload element other resources requests for enhancement rfe to the custom controls rfe to the custom controls interfaces rfe to the xforms api troubleshooting xforms forms using xforms and php xforms api reference xforms config variables xforms custom controls xforms custom controls examples xforms styling background-size foreach ...
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Notes on HTML Reflow - Archive of obsolete content
Archive › Misc top level › Notes on HTML Reflow
the html formatting objects are called frames : a frame corresponds to the geometric information for (roughly) a single element in the content model; the frames are arranged into a hierarchy that parallels the containment hierarchy in the content model.
...more than one frame may be needed to represent a single element from the content model; for example, text that wraps is broken into several frames, one per wrapped line.
...elements later "in the flow" typically do not affect the geometry of elements that are earlier "in the flow", so layout can proceed left-to-right, top-to-bottom through the document.
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Space Manager High Level Design - Archive of obsolete content
Archive › Mozilla › Space Manager High Level Design
overview the space manager and associated classes and structures are used by block and line layout to manage rectangular regions that are occupied and available, for correct handling of floated elements and the elements that flow around them.
... when elements are floated to the left or right in a layout, they take up space and influence where other elements can be placed.
...this information is used by block layout to correctly compute where other floated elements should be placed, and how much space is available to normal in-flow elements that flow around the floated bits.
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Event Handlers - Archive of obsolete content
Archive › Mozilla › XBL › XBL 1.0 Reference › Event Handlers
event handlers are defined using handler elements.
...this action can be specified either using an action attribute or by specifying the script as a child of the handler element.
...(note that there is a possibility that this may change in the future.) handlers are attached to the bound element, and they are registered by default for bubbling events.
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flex - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › flex
« xul reference home flex type: string (representing an integer) indicates the flexibility of the element, which indicates how an element's container distributes remaining empty space among its children.
... flexible elements grow and shrink to fit their given space.
... elements with larger flex values will be made larger than elements with lower flex values, at the ratio determined by the two elements.
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resizeafter - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › resizeafter
« xul reference home resizeafter type: one of the values below this attribute indicates which element to the right or below the splitter should be resized when the splitter is repositioned.
... closest the element immediately to the right or below the splitter resizes.
... farthest the element that is the farthest away from the splitter to the right or below the splitter resizes.
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Deprecated and defunct markup - Archive of obsolete content
Archive › Mozilla › XUL › Deprecated and defunct markup
{many elements on this page are wrongly marked as deprecated, this page needs review} the following xul tags and attribute should be considered deprecated, if not defunct.
... the list below may include a few elements which are actually in use, but at a deeper level in the code.
... elements <actions> (listed here by mistake or was it a container tag?) typo for <action> --neil 03 march 2011 <autorepeatbutton> (action occurs repeatedly on mouse hover--used to construct other elements; used in <arrowscrollbox> and large drop-down menus) so, not deprecated?
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Additional Template Attributes - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Additional Template Attributes
« previousnext » referencing templates all the templates used so far have had the template placed inside the root element with the datasources attribute.
...to use this technique, place a template attribute on the root element set to the id of a template.
...</template> this template will be shared with any other element that references the id 'phototemplate'.
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RDF Modifications - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › RDF Modifications
for instance, an assert call looks like the following: var source = rdf.getresource("http://www.xulplanet.com/ndeakin/images/t/obelisk.jpg"); var predicate = rdf.getresource("http://purl.org/dc/elements/1.1/description"); var target = rdf.getliteral("one of the thirty or so egyptian obelisks"); datasource.assert(source, predicate, target, true); the assert call adds a new triple to the rdf datasource.
... subject: http://www.xulplanet.com/ndeakin/images/t/obelisk.jpg predicate: http://purl.org/dc/elements/1.1/description object: one of the thirty or so egyptian obelisks the template builder will be notified through the rdf observer mechanism of the change.
...let's assume we have single query with as follows: <query> <content uri="?start"/> <member container="?start" child="?photo"/> <triple subject="?photo" predicate="http://purl.org/dc/elements/1.1/title" object="?title"/> <triple subject="?photo" predicate="http://purl.org/dc/elements/1.1/description" object="?description"/> </query> these query statements will cause any photos with both a title and a description to be displayed.
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Rule Compilation - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Rule Compilation
an attribute substitution syntax, explained later, is used to modify the attributes of elements generated from the template, to correspond with the data for each result.
...if only one rule is needed, the rule element is optional.
...thus, changing the rule elements around dynamically doesn't affect anything.
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Simple Example - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Simple Example
<?xml version="1.0"?> <rdf:rdf xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#" xmlns:dc="http://purl.org/dc/elements/1.1/"> <rdf:seq rdf:about="http://www.xulplanet.com/rdf/myphotos"> <rdf:li rdf:resource="http://www.xulplanet.com/ndeakin/images/t/palace.jpg"/> <rdf:li rdf:resource="http://www.xulplanet.com/ndeakin/images/t/canal.jpg"/> <rdf:li rdf:resource="http://www.xulplanet.com/ndeakin/images/t/obelisk.jpg"/> </rdf:seq> <rdf:description rdf:about="http://www.xulplanet.com/ndeakin/images/t/palace.jpg" dc:title="palace from above"/> <r...
... <query> <content uri="?start"/> <member container="?start" child="?photo"/> <triple subject="?photo" predicate="http://purl.org/dc/elements/1.1/title" object="?title"/> </query> the seed is set in a similar manner as the previous examples, effectively creating a single result with the ?start variable set to the reference resource 'http://www.xulplanet.com/rdf/myphotos'.
... (?start = http://www.xulplanet.com/rdf/myphotos) the member element is used to iterate over the children of a container (or the reverse).
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XML Assignments - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › XML Assignments
to do this, we use an additional element, the assign element.
... this element allows the use of additional xpath expressions to get more data from the xml data.
...<query expr="person"> <assign var="?namelength" expr="string-length(@name)"/> <assign var="?siblings" expr="count(../*) - 1"/> </query> <action> <hbox uri="?" align="center"> <button label="?name"/> <label value="?gender"/> <label value="?namelength"/> <label value="?siblings"/> </hbox> </action> </template> </vbox> two assign elements are placed as children of the query element.
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Creating toolbar buttons (Customize Toolbar Window) - Archive of obsolete content
Archive › Mozilla › XUL › Toolbars › Creating toolbar buttons
lette"> <toolbarbutton id="myextension-button" class="toolbarbutton-1" label="&toolbarbutton.label;" tooltiptext="&toolbarbutton.tooltip;" onclick="myextension.onclick(event);"/> </toolbarpalette> onclick: function(event) { switch(event.button) { case 0: // left click break; case 1: // middle click break; case 2: // right click break; } } to add more buttons, put more <toolbarbutton> elements inside the <toolbarpalette> element.
... wrap elements other than <toolbarbutton> in <toolbaritem>.
...a simple document.getelementbyid('browsertoolbarpalette') will not work.
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Custom Tree Views - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Custom Tree Views
naturally, since a custom tree view is being used, the content tree view will not be used, so the treeitem, treerow, and treecell elements will have no purpose since the custom view will get its data from elsewhere.
... thus, you can just leave the treechildren element empty.
... settree( tree ) this method is called once to set the tree element on the view.
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More Button Features - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › More Button Features
in general, it can be used on all xul elements.
...you probably wouldn't use this very often, but you might use it when creating custom elements.
... for example, the following will create a button where two of the words are red: example 4 : source view <button> <description value="this is a"/> <description value="rather strange" style="color: red;"/> <description value="button"/> </button> any xul element may be placed inside the button.
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More Menu Features - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › More Menu Features
« previousnext » in this section, we'll look at creating submenus and checked menus creating submenus you can create submenus inside other menus (nested menus) using the existing elements.
... remember that you can put any element inside a menupopup.
...however, you can create submenus by simply placing the menu element inside the menupopup element.
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Numeric Controls - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Numeric Controls
« previousnext » xul has two elements used for the entry of numeric values or ranges, and well as two elements for entering dates and times.
... these elements are only available in firefox 3 and later.
...scales a scale element may also be used to select from a range of values.
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RDF Datasources - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › RDF Datasources
instead, only the files and directories that the tree element (or other elements) will need to display at a given time will be determined.
...the attributes on the rule element will match if they match the attributes on an rdf description element.
...the ref attribute has been set to the root element in the rdf file, which is the top-level seq.
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Scrolling Menus - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Scrolling Menus
« previousnext » this section will describe scrolling menus and how to use the mechanism with other elements.
...it is implemented using an arrowscrollbox element.
... this element can be used to create a scrolling box with arrows.
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XUL FAQ - Archive of obsolete content
Archive › Mozilla › XUL › XUL FAQ
are there any elements inside the <prefwindow>, before the <prefpane>s?
... (putting any elements there triggers bug 296418.) are prefpanes nested correctly?
... does script outside <prefpane> refer to any element in <prefpane>?
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binding - Archive of obsolete content
Archive › Mozilla › XUL › binding
« xul reference home [ examples | attributes | properties | methods | related ] should be contained within a bindings element.
...like the triple element in syntax, it can be used to bind a particular property of a matched node to a particular variable name.
... properties object, predicate, subject examples fixme: (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties object type: string the object of the element.
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bindings - Archive of obsolete content
Archive › Mozilla › XUL › bindings
this element should be contained within a rule element and contain one or more binding elements.
... this element is optional in firefox 3/mozilla 1.9 and later; instead binding elements may be placed directly inside the rule element.
... examples (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width object type: string the object of the element.
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broadcaster - Archive of obsolete content
Archive › Mozilla › XUL › broadcaster
« xul reference home [ examples | attributes | properties | methods | related ] a broadcaster is used when you want multiple elements to share one or more attribute values, or when you want elements to respond to a state change.
... any elements that are observing the broadcaster will share the attributes placed on the broadcaster.
... for menuitems or buttons that just want to have their disabled status set when the feature should be disabled, you should use a command element instead.
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conditions - Archive of obsolete content
Archive › Mozilla › XUL › conditions
« xul reference home [ examples | attributes | properties | methods | related ] this element should appear directly inside a rule element and is used to define conditions for the rule.
... within the conditions can be placed content, member and triple elements.
... this element is used with firefox 2/mozilla 1.8 and earlier instead of the query element.
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dialogheader - Archive of obsolete content
Archive › Mozilla › XUL › dialogheader
this element should be placed inside a dialog element.
....0"?> <?xml-stylesheet href="chrome://global/skin/global.css" type="text/css"?> <dialog id="donothing" title="dialog example" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <dialogheader title="my dialog" description="example dialog"/> <!-- other widgets --> </dialog> attributes crop type: one of the values below if the label of the element is too big to fit in its given space, the text will be cropped on the side specified by the crop attribute.
... depending on the platform and theme being used, some elements will have set a maximum width so they will always appear cropped.
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groupbox - Archive of obsolete content
Archive › Mozilla › XUL › groupbox
« xul reference home [ examples | attributes | properties | methods | related ] the groupbox is used to group related elements together.
... if a caption element is placed inside the groupbox, it will be used as a caption which appears along the top of the groupbox.
... properties accessibletype examples <groupbox> <caption label="settings"/> <radiogroup> <radio label="black and white"/> <radio label="colour"/> </radiogroup> <checkbox label="enabled"/> </groupbox> attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, remove...
...And 2 more matches
hbox - Archive of obsolete content
Archive › Mozilla › XUL › hbox
« xul reference home [ examples | attributes | properties | methods | related ] a container element which can contain any number of child elements.
... this is equivalent to the box element, except it defaults to horizontal orientation.
... example <!-- two button on the right --> <hbox> <spacer flex="1"/> <button label="connect"/> <button label="ping"/> </hbox> attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties al...
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member - Archive of obsolete content
Archive › Mozilla › XUL › member
« xul reference home [ examples | attributes | properties | methods | related ] used within a rule's conditions element to match elements that are containers or are contained within another element.
... properties child, container examples (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties child type: ?
... a variable reference to a node that is expected to be a child of the element that is referred to by the container element.
...And 2 more matches
popupset - Archive of obsolete content
Archive › Mozilla › XUL › popupset
« xul reference home [ examples | attributes | properties | methods | related ] a container for menupopup, panel and tooltip elements.
... this element is optional; the given elements need not appear in a popupset container.
... examples <popupset> <menupopup id="clipmenu"> <menuitem label="cut"/> <menuitem label="copy"/> <menuitem label="paste"/> </menupopup> </popupset> <label value="right click for popup" context="clipmenu"/> attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, toolt...
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progressmeter - Archive of obsolete content
Archive › Mozilla › XUL › progressmeter
ies accessibletype, max, mode, value examples <progressmeter mode="determined" value="82"/> <progressmeter mode="undetermined"/> <!-- switching modes while the mouse is over a button --> <progressmeter mode="determined" id="myprogress"/> <button label="example" onmouseover="setloading(true)" onmouseout="setloading(false)"/> function setloading(state){ document.getelementbyid('myprogress').mode = (state) ?
... inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, remove...
...element, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties accessibletype type: integer a value indicating the type of accessibility object for the element.
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query - Archive of obsolete content
Archive › Mozilla › XUL › query
for rdf datasources, the query should contain one content element as well as member and/or triple elements.
... for xml datasources, the query should have an expr attribute and may optionally contain assign elements.
...any namespace prefixes declared on the element may be used within the expression.
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statusbar - Archive of obsolete content
Archive › Mozilla › XUL › statusbar
« xul reference home [ examples | attributes | properties | methods | related ] an element used to create a status bar, usually placed along the bottom of a window.
... properties accessibletype examples <statusbar> <statusbarpanel label="left panel"/> <spacer flex="1"/> <progressmeter mode="determined" value="82"/> <statusbarpanel label="right panel"/> </statusbar> attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortres...
...ource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties accessibletype type: integer a value indicating the type of accessibility object for the element.
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tabpanel - Archive of obsolete content
Archive › Mozilla › XUL › tabpanel
« xul reference home [ examples | attributes | properties | methods | related ] a individual panel in a tabpanels element.
... this element is optional and you may just use any other container in place of it.
... examples (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, d...
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textnode - Archive of obsolete content
Archive › Mozilla › XUL › textnode
in the case of the textnode element, the entire node is replaced with text corresponding to the result of the value attribute.
... this is useful if you want to use the html element or other elements that have text content inside them instead of in attributes.
... this element does nothing outside of a template.
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vbox - Archive of obsolete content
Archive › Mozilla › XUL › vbox
« xul reference home [ examples | attributes | properties | methods | related ] a container element which can contain any number of child elements.
... this is equivalent to the box element, except it defaults to vertical orientation.
... example <!-- two labels at bottom --> <vbox> <spacer flex="1"/> <label value="one"/> <label value="two"/> </vbox> attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , a...
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wizardpage - Archive of obsolete content
Archive › Mozilla › XUL › wizardpage
« xul reference home [ examples | attributes | properties | methods | related ] this element defines a page in a wizard.
... the content in the pages should be placed inside the wizardpage element.
... label type: string the label that will appear on the element.
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Dialogs in XULRunner - Archive of obsolete content
Archive › Mozilla › XULRunner › Dialogs in XULRunner
xul provides a dialog element to act as the container for the dialog.
...alogheader title="my dialog" description="example dialog"/> <groupbox flex="1"> <caption label="select favorite fruit"/> <radiogroup> <radio id="1" label="oranges because they are fruity"/> <radio id="2" selected="true" label="strawberries because of color"/> <radio id="3" label="bananna because it pre packaged"/> </radiogroup> </groupbox> </dialog> xul window elements have a special method to open dialogs, called window.opendialog().
... here is the code needed to open a dialog: function opendialog() { window.opendialog("chrome://basicapp/content/dialog.xul", "newdlg", "modal"); } the resulting dialog looks like this on windows 2000, and will look similar on other operating systems: the first thing that caught my eye about dialog is the button-related attributes on the element.
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Why Well-Formed Web RSS Module is Popular - Syndicating Your Comments - Archive of obsolete content
Archive › RSS › Article › Why Well-Formed Web RSS Module is Popular - Syndicating Your Comments
sure rss has the <comments> element, but it points to a html page that isn't machine readable.
... an example using the most popular element of the well-formed web rss module is shown below: <?xml version="1.0"> <rss version="2.0" xmlns:wfw="http://wellformedweb.org/commentapi/" > <channel> <title>example</title> <description>an rss example with wfw</description> <lastbuilddate>sun, 15 may 2005 13:02:08 -0500</lastbuilddate> <link>http://www.example.com</link> <item> <title>i like root beer</title> <guid>d77d2e80-0487-4e8c-a35d-a93f12a0ff7d:article:54321</guid> <pubdate>sun, 15 may 2005 13:02:08 -0500</pubdate> <link>http://www.example.com/article/54321</link> <wfw:commentrss>http://www.ex...
...e.com/feed/rss/54320/comments</wfw:commentrss> </item> <item> <title>huh?!</title> <guid>d77d2e80-0487-4e8c-a35d-a93f12a0ff7d:article:54319</guid> <pubdate>sun, 15 may 2005 08:14:11 -0500</pubdate> <link>http://www.example.com/article/54319</link> <wfw:commentrss>http://www.example.com/feed/rss/54319/comments</wfw:commentrss> </item> </channel> </rss> the <wfw:commentrss> element is the reason that the well-formed web rss module is popular.
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Syndicating content with RSS - Archive of obsolete content
Archive › RSS › Getting Started › Syndicating
adding a special <link> element to html page(s).
... adding a special <a> element to html page(s).
...when this is the case, the html web page can let people and machines know about the feed by using the <link> element, like this: <link rel="alternate" type="application/rss+xml" href="http://example.com/feed" /> adding the <a> while use of the html <link> element is powerful, it is mostly hidden.
...And 2 more matches
title - Archive of obsolete content
Archive › RSS elements › title
rsstitle element <title>...</title> - the rss title element has 4 uses.
... the rsstitle element contain onlyplain text data.
... why can't i get any tang?</description> </item> </channel> </rss> attributes none sub-elements none parent elements the table below shows a list of rss elements that this element can be a child of.
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Table Reflow Internals - Archive of obsolete content
Archive › Table Reflow Internals
absolutely positioned elements) reflows reflowee and passes a reflow state (in) and a reflow metrics (in/out) review of reflow the reflow state: is a node in a tree structurally equivalent to the frame tree of reflow participants contains: reflow type, avail size, various computed values, resolved style structs possible request for preferred size and more.
... review of reflow the reflow metrics contains: max element size (if requested) - the minimum size it can be preferred size (if requested) - the size it would like to be given no size constraints.
...the table figures out the column widths (balances) given the style width constraints on the table, col groups, cols, cells the preferred and max element sizes of the cells (from the pass 1 reflow), and considers colspans pass 2 - cell widths are constrained by the column widths (heights are only constrained in paginated mode).
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Building a Theme - Archive of obsolete content
Archive › Themes › Building a Theme
these xul elements are styled using css.
... the browser ui has absolutely no styling on its own - if you try to start up with an empty theme, firefox will be unusable, as the button elements will be drawn as plain text.
...you can use this to inspect any element in a web page or an xul document, which makes it invaluable for themes.
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Developing cross-browser and cross-platform pages - Archive of obsolete content
Archive › Using Web Standards in your Web Pages › Developing cross-browser and cross-platform pages
function hideelement(id_attribute_value) { if (document.getelementbyid && document.getelementbyid(id_attribute_value) && document.getelementbyid(id_attribute_value).style ) { document.getelementbyid(id_attribute_value).style.visibility = "hidden"; }; } // example: // <button type="button" onclick="hideelement('d1');">hide div</button> // <div id="d1">some text</div> these repeated calls to doc...
...ument.getelementbyid are not the most efficient way to check for the existence of particular objects or features in the browser's dom implementation, but they serve to illustrate clearly how object support detection works.
... the top-level if clause looks to see if there is support for a method called getelementbyid on the document object, which is the one of the most basic levels of support for the dom in a browser.
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RFE to the XForms API - Archive of obsolete content
Archive › Web › XForms › RFE › XForms API
xforms dom is a list of interfaces that are available from xforms elements directly.
... this means those interfaces available to be queried from the xforms element that resides in the dom.
... for example, every visual xforms element exposes the nsixformsdelegate interface.
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Building up a basic demo with the PlayCanvas engine - Game development
Games › Techniques › 3D on the web › Building up a basic demo with PlayCanvas › engine
<!doctype html> <html> <head> <meta charset="utf-8"> <title>mdn games: playcanvas demo</title> <style> body { margin: 0; padding: 0; } canvas { width: 100%; height: 100%; } </style> </head> <body> <script src="playcanvas-latest.js"></script> <canvas id="application-canvas"></canvas> <script> var canvas = document.getelementbyid("application-canvas"); /* all our javascript code goes here */ </script> </body> </html> it contains some basic information like the document <title>, and some css to set the width and height of the <canvas> element that playcanvas will use to 100% so that it will fill the entire available viewport space.
... the first <script> element includes the playcanvas library in the page; we will write our example code in the second one.
... there is one helper variable already included, which will store a reference to the <canvas> element.
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GLSL Shaders - Game development
Games › Techniques › 3D on the web › GLSL Shaders
body> <script id="vertexshader" type="x-shader/x-vertex"> // vertex shader's code goes here </script> <script id="fragmentshader" type="x-shader/x-fragment"> // fragment shader's code goes here </script> <script> // scene setup goes here </script> </body> </html> it contains some basic information like the document <title>, and some css to set the width and height of the <canvas> element that three.js will insert on the page to be the full size of the viewport.
... the <script> element in the <head> includes the three.js library in the page; we will write our code into three script tags in the <body> tag: the first one will contain the vertex shader.
... go to the cube.html file on github, copy all the javascript code from inside the second <script> element, and paste it into the third <script> element of the current example.
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2D maze game with device orientation - Game development
Games › Tutorials › HTML5 Gamedev Phaser Device Orientation
if there's nothing specified in that last argument or the element is not found, the canvas will be added to the <body> tag.
... without the framework, to add the canvas element to the page, you would have to write something like this inside the <body> tag: <canvas id='game' width='320' height='480'></canvas> the important thing to remember is that the framework is setting up helpful methods to speed up a lot of things like image manipulation or assets management, which would be a lot harder to do manually.
... this.game.scale.scalemode = phaser.scalemanager.show_all; this.game.scale.pagealignhorizontally = true; this.game.scale.pagealignvertically = true; this.game.state.start('preloader'); } }; the main ball object is defined and we're adding two variables called _width and _height that are the width and the height of the game canvas — they will help us position the elements on the screen.
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Accessibility tree (AOM) - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › AOM
the accessibility tree, or accessibility object model (aom), contains accessibility-related information for most html elements.
...the dom tree contains objects for all the markup’s elements, attributes, and text nodes.
... description how do we describe this element, if we want to add anything to the name?
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XInclude - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › XInclude
code sample the following code aims to let <xi:include> and <xi:fallback> tags (the two elements in the language) with all of the attributes of <xi:include> be included in an xml document so as to be resolvable into a single xml document.
...should become: var href = getxmlbaselink (/* xlink sans xml:base */ xinclude.getattribute('href'), /* element to query from */ xinclude); function resolvexincludes(docu) { // http://www.w3.org/tr/xinclude/#xml-included-items var xincludes = docu.getelementsbytagnamens('http://www.w3.org/2001/xinclude', 'include'); if (xincludes) { for (i=0; i < xincludes.length; i++) { var xinclude = xincludes[i]; var href = xinclude.getattribute('href'); var parse = xinclude.getattribute('parse'); ...
... var encoding = xinclude.getattribute('encoding'); // e.g., utf-8 // "text/xml or application/xml or matches text/*+xml or application/*+xml" before encoding (then utf-8) var accept = xinclude.getattribute('accept'); // header "accept: "+x var acceptlanguage = xinclude.getattribute('accept-language'); // "accept-language: "+x var xifallback = xinclude.getelementsbytagnamens('http://www.w3.org/2001/xinclude', 'fallback')[0]; // only one such child is allowed if (href === '' || href === null) { // points to same document if empty (null is equivalent to empty string) href = null; // set for uniformity in testing below if (parse === 'xml' && xpointer === null) { alert('there must be an xpointer ...
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Assessment: Accessibility troubleshooting - Learn web development
Learn › Accessibility › Accessibility troubleshooting
if the online editor you are using doesn't have a separate css/js panel, feel free to put them in appropriate <style> / <script> elements.
... the navigation menu part of the site (wrapped in <div class="nav"></div>) could be made more accessible by putting it in a proper html5 semantic element.
...once you add paragraph elements, you'll notice the styling looking better.
...And 2 more matches
CSS building blocks - Learn web development
Learn › CSS › Building blocks
css selectors there are a wide variety of css selectors available, allowing for fine-grained precision when selecting elements to style.
...the sub-articles are as follows: type, class, and id selectors attribute selectors pseudo-classes and pseudo-elements combinators the box model everything in css has a box around it, and understanding these boxes is key to being able to create layouts with css, or to align items with other items.
...understanding how big the different features in your design will be is important, and in this lesson, we will summarize the various ways elements get a size via css and define a few terms around sizing that will help you in the future.
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Test your skills: floats - Learn web development
Learn › CSS › CSS layout › Floats skills
you will be working through three small tasks which use different elements of the material you have just covered.
... floats one in this task you need to float the two elements with a class of float1 and float2 left and right respectively.
... float two in this example the element with a class of float should be floated left.
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How CSS works - Learn web development
Learn › CSS › First steps › How CSS works
element, class, id, and so on.
...each element, attribute, and piece of text in the markup language becomes a dom node in the tree structure.
...some elements are parents of child nodes, and child nodes have siblings.
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What is CSS? - Learn web development
Learn › CSS › First steps › What is CSS
using css you can control exactly how html elements look in the browser, presenting your markup using whatever design you like.
... css syntax css is a rule-based language — you define rules specifying groups of styles that should be applied to particular elements or groups of elements on your web page.
...this selects the html element that we are going to style.
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Creating hyperlinks - Learn web development
Learn › HTML › Introduction to HTML › Creating hyperlinks
anatomy of a link a basic link is created by wrapping the text or other content, see block level links, inside an <a> element and using the href attribute, also known as a hypertext reference, or target, that contains the web address.
... block level links as mentioned before, almost any content can be made into a link, even block-level elements.
... if you have an image you want to make into a link, use the <a> element and reference the image file with the <img> element.
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Structuring a page of content - Learn web development
Learn › HTML › Introduction to HTML › Structuring a page of content
project brief for this project, your task is to take the content for the homepage of a bird watching website and add structural elements to it so it can have a page layout applied to it.
... you need to add a suitable wrapper for: the header the navigation menu the main content the welcome text the image sidebar the footer you should also: apply the provided css to the page by adding another <link> element just below the existing one provided at the start.
... you don't need to know any css to do this assessment; you just need to put the provided css inside an html element.
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Introduction to HTML - Learn web development
Learn › HTML › Introduction to HTML
at its heart, html is a fairly simple language made up of elements, which can be applied to pieces of text to give them different meaning in a document (is it a paragraph?
... getting started with html covers the absolute basics of html, to get you started — we define elements, attributes, and other important terms, and show where they fit in the language.
... we also show how a typical html page is structured and how an html element is structured, and explain other important basic language features.
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Introducing asynchronous JavaScript - Learn web development
Learn › JavaScript › Asynchronous › Introducing
let's look at a simple example (see it live here, and see the source): const btn = document.queryselector('button'); btn.addeventlistener('click', () => { alert('you clicked me!'); let pelem = document.createelement('p'); pelem.textcontent = 'this is a newly-added paragraph.'; document.body.appendchild(pelem); }); in this block, the lines are executed one after the other: we grab a reference to a <button> element that is already available in the dom.
... once the alert is dismissed, we create a <p> element.
... an example of an async callback is the second parameter of the addeventlistener() method (as we saw in action above): btn.addeventlistener('click', () => { alert('you clicked me!'); let pelem = document.createelement('p'); pelem.textcontent = 'this is a newly-added paragraph.'; document.body.appendchild(pelem); }); the first parameter is the type of event to be listened for, and the second parameter is a callback function that is invoked when the event is fired.
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Image gallery - Learn web development
Learn › JavaScript › Building blocks › Image gallery
if the online editor you are using doesn't have separate javascript/css panels, feel free to put them inline <script>/<style> elements inside the html page.
...the html body looks like this: <h1>image gallery example</h1> <div class="full-img"> <img class="displayed-img" src="images/pic1.jpg"> <div class="overlay"></div> <button class="dark">darken</button> </div> <div class="thumb-bar"> </div> the example looks like this: the most interesting parts of the example's css file: it absolutely positions the three elements inside the full-img <div> — the <img> in which the full-sized image is displayed, an empty <div> that is sized to be the same size as the <img> and put right over the top of it (this is used to apply a darkening effect to the image via a semi-transparent background color), and a <button> that is used to control the darkening effect.
... your javascript needs to: loop through all the images, and for each one insert an <img> element inside the thumb-bar <div> that embeds that image in the page.
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Solve common problems in your JavaScript code - Learn web development
Learn › JavaScript › Howto
some common built-in browser functions that cause problems are: correct wrong getelementsbytagname() getelementbytagname() getelementsbyname() getelementbyname() getelementsbyclassname() getelementbyclassname() getelementbyid() getelementsbyid() semi-colon position you need to make sure you don't place any semi-colons incorrectly.
... how do you iterate over the elements in an array?
... how do you iterate over the elements in a multidimensional array?
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Beginning our React todo list - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › React todo list beginning
<button type="button" classname="btn"> edit <span classname="visually-hidden">repeat</span> </button> <button type="button" classname="btn btn__danger"> delete <span classname="visually-hidden">repeat</span> </button> </div> </li> </ul> </div> ); } now open public/index.html and change the <title> element’s text to todomatic.
...first, consider the jsx we have, and how it corresponds to our user stories: we have a <form> element, with an <input type="text"> for writing out a new task, and a button to submit the form.
...once we have put our styles in place, though, any element with this class will be hidden from sighted users and still available to screen reader users — this is because these words are not needed by sighted users; they are there to provide more information about what the button does for screenreader users that do not have the extra visual context to help them.
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Dynamic behavior in Svelte: working with variables and props - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Svelte variables props
replace the existing <ul> element with the following simplified version to get an idea of how it works: <ul> {#each todos as todo, index (todo.id)} <li> <input type="checkbox" checked={todo.completed}/> {index}.
... update the <input type="checkbox"> element inside src/components/todos.svelte as follows: <input type="checkbox" id="todo-{todo.id}" on:click={() => todo.completed = !todo.completed} checked={todo.completed} /> next we'll add a function to remove a todo from our todos array.
...that means that the addtodo() function is executed, the element is added to the todos array, but svelte won't detect that the push method modified the array, so it won't refresh the tasks <ul>.
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HTML parser threading
Mozilla › Gecko › HTML parser threading
each tree op represents a small operation, such as element creation or appending a node into another, that can later be performed on the main thread.
...(aside: it would make more sense to make the parser deal with nsstringbuffers directly without having heap-allocated nsstrings involved.) element names, attribute names and the doctype name are represented as nsiatoms.
... pre-interned attribute and element names hold atoms that are actually app-wide nsstaticatoms.
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MathML Torture Test
Mozilla › MathML Project › MathML Torture Test
i> <mtext>&nbsp;</mtext> <mi>b</mi> <mtext>'s</mtext> </mrow> </mover> </mover> </mrow> <munder> <mo>&underbrace;</mo> <mrow> <mi>k</mi> <mo>+</mo> <mi>&ell;</mi> <mtext>&nbsp;elements</mtext> </mrow> </munder> </munder> <mo stretchy="false">}</mo> </mrow> </math> </td> </tr> <tr> <td>23</td> <td><img src="https://udn.realityripple.com/samples/45/c73ac26e1d.png" width="213" height="108" alt="texbook, 18.42" /></td> <td> <math display="block"> <mrow> <mo>(</mo> <mta...
... <mtext>&nbsp;</mtext> <mi>&#x1ee1c;</mi> <mtext>'s</mtext> </mrow> </mover> </mover> </mrow> <munder> <mo>&underbrace;</mo> <mrow> <mi>&#x1ee1f;</mi> <mo>+</mo> <mi>&ell;</mi> <mtext>&nbsp;elements</mtext> </mrow> </munder> </munder> <mo stretchy="false">}</mo> </mrow> </math> </td> <td> <math dir="rtl" display="block"> <mrow> <mo stretchy="false">{</mo> <munder> <mrow> <mover> <mrow> <mpadded width="0em"><mphantom><mo>(</mo></mph...
... <mtext>&nbsp;</mtext> <mi>&#x1ee1c;</mi> <mtext>'s</mtext> </mrow> </mover> </mover> </mrow> <munder> <mo>&underbrace;</mo> <mrow> <mi>&#x1ee1f;</mi> <mo>+</mo> <mi>&ell;</mi> <mtext>&nbsp;elements</mtext> </mrow> </munder> </munder> <mo stretchy="false">}</mo> </mrow> </math> </td> <td> <math display="block"> <mrow> <mo stretchy="false">{</mo> <munder> <mrow> <mover> <mrow> <mpadded width="0em"><mphantom><mo>(</mo></mphantom></mp...
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MathML Demo: <mspace> - space
Mozilla › MathML Project › mspace
mathml demo: <mspace> - space the background color of <mspace> elements has been set to yellow for easier viewing.
... you can set the width ∑ x y height ∫ x y and depth [ x y ] of mspace elements (click the math text to view the numeric values that are set).
... interactive sizing html content <p> use the control buttons below to adjust the parameters of the <code>mspace</code> element and see the effects.
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Profiling with the Firefox Profiler
Mozilla › Performance › Profiling with the Built-in Profiler
elements in the timeline are spaced at the sampling frequency with an attempt to align them with time.
...also note that you can click on timeline elements (the selected element gets darker when selected) and the tree view (see below) reflects the selected element.
...there are lighter grey names to the right of tree elements that indicate where the code comes from.
...And 2 more matches
PR_NEXT_LINK
Mozilla › Projects › NSPR › Reference › PR NEXT LINK
returns the next element in a list.
... syntax #include <prclist.h> prclist *pr_next_link (prclist *elemp); parameter elemp a pointer to the element.
... returns a pointer to a list element.
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PR_PREV_LINK
Mozilla › Projects › NSPR › Reference › PR PREV LINK
returns the preceding element in a list.
... syntax #include <prclist.h> prclist *pr_prev_link (prclist *elemp); parameter elemp a pointer to the element.
... returns a pointer to a list element.
...And 2 more matches
Python binding for NSS
Mozilla › Projects › NSS › Python binding for NSS
python also provides an abstraction of common operating system services but because nss and nspr are tightly bound python-nss exposes elements of nspr.
... nss/nspr objects whose collection elements can be referenced by name support associative indexing.
... deprecated elements of the python-nss api are marked with python deprecation warnings as well as being documented in the nss module documentation.
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JS_DefineFunctions
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS DefineFunctions
each element of the array defines an individual function.
... fs is a pointer to the first element of an array of jsfunctionspec records.
...each array element defines a single function: its name, the native c/c++ implementation, the number of javascript arguments the function expects, and any property attributes.
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Parser API
Mozilla › Projects › SpiderMonkey › Parser API
interface arrayexpression <: expression { type: "arrayexpression"; elements: [ expression | null ]; } an array expression.
... interface arraypattern <: pattern { type: "arraypattern"; elements: [ pattern | null ]; } an array-destructuring pattern.
... interface xmlelement <: xml, expression { type: "xmlelement"; contents: [ xml ]; } an e4x literal representing a single xml element.
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nsIControllers
Mozilla › Tech › XPCOM › Reference › Interface › nsIControllers
content/xul/document/public/nsicontrollers.idlscriptable represents a list of nsicontroller elements.
...windows and text inputs have default controllers that allow commands such as cmd_copy to act on the focused element or window.
... xul elements can also have controllers, although they do not have any default controllers.
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nsIFeedTextConstruct
Mozilla › Tech › XPCOM › Reference › Interface › nsIFeedTextConstruct
some extension elements also include "type" parameters, and this interface could be used to represent those as well.
... method overview nsidomdocumentfragment createdocumentfragment(in nsidomelement element); astring plaintext(); attributes attribute type description base nsiuri if the text construct contains html or xhtml, relative references in the content should be resolved against this base uri.
... methods createdocumentfragment() creates a new document fragment on a given dom element, containing the text and (if the text construct contains html or xhtml) its markup.
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nsIMacDockSupport
Mozilla › Tech › XPCOM › Reference › Interface › nsIMacDockSupport
this can be done like this: var docksupport = cc['@mozilla.org/widget/macdocksupport;1'].getservice(ci.nsimacdocksupport); console.log('docksupport:', docksupport); var win = services.wm.getmostrecentwindow('navigator:browser'); var macmenu = win.document.createelementns('http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul', 'menupopup'); macmenu.setattribute('id', 'mymacmenu'); var macmenuitem = win.document.createelementns('http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul', 'menuitem'); macmenuitem.setattribute('label', 'show most recent window'); macmenuitem.setattribute('id', 'mymacmenuitem'); macmenuitem.addeventlistener('command', f...
...unction(){ var docksupport = cc['@mozilla.org/widget/macdocksupport;1'].getservice(ci.nsimacdocksupport); docksupport.activateapplication(true); services.wm.getmostrecentwindow(null).focus() }) macmenu.appendchild(macmenuitem); var mainpopupset = win.document.getelementbyid('mainpopupset'); mainpopupset.appendchild(macmenu); let dockmenuelement = macmenu; //document.getelementbyid("menu_mac_dockmenu");66 let nativemenu = cc["@mozilla.org/widget/standalonenativemenu;1"].createinstance(ci.nsistandalonenativemenu); console.log('dockmenuelement:', dockmenuelement); nativemenu.init(dockmenuelement); docksupport.dockmenu = nativemenu; this replaces the default menu with this one menuitem that says "show most recent window".
...this is the recommended way to add to the native menu, just maniuplate the default menu dom element.
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nsIVariant
Mozilla › Tech › XPCOM › Reference › Interface › nsIVariant
violates the xpcom interface guidelines getasarray() nsresult getasarray( out pruint16 type, out nsiid iid, out pruint32 count, out voidptr ptr ); parameters type the type of the array elements.
... iid the iid of the array elements, if they are interface pointers.
... count the number of elements in the array.
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Building a Thunderbird extension 3: install manifest
Mozilla › Thunderbird › Thunderbird extensions › Building a Thunderbird extension 3: install manifest
<em:id>{3550f703-e582-4d05-9a08-453d09bdfdc6}</em:id>: this element contains the version id of the application that this add on is developed for.
... <em:minversion>1.5</em:minversion>: this element indicates the earliest version of thunderbird for which the extension is intended to work.
... <em:maxversion>5.0.*</em:maxversion>: this element indicates the most recent version of thunderbird for which the extension is intended to work.
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Initialization and Destruction - Plugins
Plugins › Guide › Initialization and Destruction
the next three parameters pass parameters from the embed element that called the plug-in.
... the argc parameter is the number of html arguments in the element.
... the arguments in the embed element are name-value pairs made up of the attribute name (for example, align) and its value (for example, top).
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3D view - Firefox Developer Tools
Tools › 3D View
off-screen elements become visible, so that you can see where your elements are located in relation to the visible content.
... you can click on elements to see their html in the html panel or the style panel.
... conversely, you can click on elements in the breadcrumb bar to change which element is selected in the 3d view.
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DOM Inspector FAQ - Firefox Developer Tools
Tools › Add-ons › DOM Inspector › DOM Inspector FAQ
those text nodes are actually the newlines and spacing between the elements.
...scroll the node into view, choose the select-by-click toolbar button, and then click on the element you wish to inspect.
... the edit menu also includes a select element by click menu item.
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DOM Inspector internals - Firefox Developer Tools
Tools › Add-ons › DOM Inspector › Internals
shared structure overlays taking a look at the contents of inspector.xul, dom inspector's primary ui, will reveal that it contains almost no visible elements.
...even most of the elements that aren't visible, such as key- and commandsets, are not defined in inspector.xul.
...the preference menuitems in the view menu that affect only the dom nodes viewer ("blink selected element", et cetera) are added by that viewer's popup overlay (resources/content/viewers/dom/popupoverlay.xul).
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Debugger.Script - Firefox Developer Tools
Tools › Debugger-API › Debugger.Script
the contents of a <script> element.
... a dom event handler, whether embedded in html or attached to the element by other javascript code.
... the elements of the array are objects, each of which describes a single entry point, and contains the following properties: linenumber: the line number for which offset is an entry point columnnumber: the column number for which offset is an entry point offset: the bytecode instruction offset of the entry point for example, suppose we have a script for the following source c...
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Tips - Firefox Developer Tools
Tools › Tips
when selecting elements: shift + click to select an element but keep selecting (picker mode doesn't disengage).
... use ←/→ to navigate to parents/children elements (if they're hard to select).
... in the rules view: click the inspector icon () next to any selector to highlight all elements that match it.
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AnalyserNode.getFloatFrequencyData() - Web APIs
Web › API › AnalyserNode › getFloatFrequencyData
if the array has fewer elements than the analysernode.frequencybincount, excess elements are dropped.
... if it has more elements than needed, excess elements are ignored.
...xt(); const analyser = audioctx.createanalyser(); // float32array should be the same length as the frequencybincount const mydataarray = new float32array(analyser.frequencybincount); // fill the float32array with data returned from getfloatfrequencydata() analyser.getfloatfrequencydata(mydataarray); drawing a spectrum the following example shows basic usage of an audiocontext to connect a mediaelementaudiosourcenode to an analysernode.
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AudioContext.createMediaStreamSource() - Web APIs
Web › API › AudioContext › createMediaStreamSource
example in this example, we grab a media (audio + video) stream from navigator.getusermedia, feed the media into a <video> element to play then mute the audio, but then also feed the audio into a mediastreamaudiosourcenode.
... the range slider below the <video> element controls the amount of gain given to the lowpass filter — increase the value of the slider to make the audio sound more bass heavy!
... var pre = document.queryselector('pre'); var video = document.queryselector('video'); var myscript = document.queryselector('script'); var range = document.queryselector('input'); // getusermedia block - grab stream // put it into a mediastreamaudiosourcenode // also output the visuals into a video element if (navigator.mediadevices) { console.log('getusermedia supported.'); navigator.mediadevices.getusermedia ({audio: true, video: true}) .then(function(stream) { video.srcobject = stream; video.onloadedmetadata = function(e) { video.play(); video.muted = true; }; // create a mediastreamaudiosourcenode // feed the htmlmediaelement into it var ...
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AudioTrackList.onremovetrack - Web APIs
Web › API › AudioTrackList › onremovetrack
the audiotracklist onremovetrack event handler is called when the removetrack event occurs, indicating that an audio track has been removed from the media element, and therefore also from the audiotracklist.
... the event is passed into the event handler in the form of a trackevent object, whose track property identifies the track that was removed from the media element's audiotracklist.
... syntax audiotracklist.onremovetrack = eventhandler; value set onremovetrack to a function that accepts as input a trackevent object which indicates in its track property which audio track has been removed from the media element.
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CanvasRenderingContext2D.addHitRegion() - Web APIs
Web › API › CanvasRenderingContext2D › addHitRegion
they let you route events to dom elements, and make it possible for users to explore the canvas without seeing it.
...inherits the cursor of the parent hit region, if any, or the canvas element's cursor.
... control an element (descendant of the canvas) to which events are to be routed.
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Compositing example - Web APIs
Web › API › Canvas API › Tutorial › Compositing › Example
var canvas1 = document.createelement("canvas"); var canvas2 = document.createelement("canvas"); var gco = [ 'source-over','source-in','source-out','source-atop', 'destination-over','destination-in','destination-out','destination-atop', 'lighter', 'copy','xor', 'multiply', 'screen', 'overlay', 'darken', 'lighten', 'color-dodge', 'color-burn', 'hard-light', 'soft-light', 'difference', 'exclusion', 'hue', 'saturation', 'color', 'luminosity' ].reverse(); var gcotext = [ 'this is the default setting and draws new shapes on top of the existing canvas conten...
... function createcanvas() { var canvas = document.createelement("canvas"); canvas.style.background = "url("+op_8x8.data+")"; canvas.style.border = "1px solid #000"; canvas.style.margin = "5px"; canvas.width = width/2; canvas.height = height/2; return canvas; } function runcomposite() { var dl = document.createelement("dl"); document.body.appendchild(dl); while(gco.length) { var pop = gco.pop(); var dt = doc...
...ument.createelement("dt"); dt.textcontent = pop; dl.appendchild(dt); var dd = document.createelement("dd"); var p = document.createelement("p"); p.textcontent = gcotext.pop(); dd.appendchild(p); var canvastodrawon = createcanvas(); var canvastodrawfrom = createcanvas(); var canvastodrawresult = createcanvas(); var ctx = canvastodrawresult.getcontext('2d'); ctx.clearrect(0, 0, width, height) ctx.save(); ctx.drawimage(canvas1, 0, 0, width/2, height/2); ctx.globalcompositeoperation = pop; ctx.drawimage(canvas2, 0, 0, width/2, height/2); ctx.globalcompositeoperation = "source-over"; ctx.fillstyle = "rgba(0,0,0,0.8)"; ctx.fillrect(0, height/2 - 20, width/2, ...
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Pixel manipulation with canvas - Web APIs
Web › API › Canvas API › Tutorial › Pixel manipulation with canvas
<canvas id="canvas" width="300" height="227" style="float:left"></canvas> <div id="color" style="width:200px;height:50px;float:left"></div> var img = new image(); img.src = 'https://mdn.mozillademos.org/files/5397/rhino.jpg'; var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); img.onload = function() { ctx.drawimage(img, 0, 0); img.style.display = 'none'; }; var color = document.getelementbyid('color'); function pick(event) { var x = event.layerx; var y = event.layery; var pixel = ctx.getimagedata(x, y, 1, 1); var data = pixel.data; var rgba = 'rgba(' + data[0] + ', ' + data[1] + ', ' + data[2...
... <canvas id="canvas" width="300" height="227"></canvas> <div> <input id="grayscalebtn" value="grayscale" type="button"> <input id="invertbtn" value="invert" type="button"> </div> var img = new image(); img.src = 'https://mdn.mozillademos.org/files/5397/rhino.jpg'; img.onload = function() { draw(this); }; function draw(img) { var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); ctx.drawimage(img, 0, 0); img.style.display = 'none'; var imagedata = ctx.getimagedata(0, 0, canvas.width, canvas.height); var data = imagedata.data; var invert = function() { for (var i = 0; i < data.length; i += 4) { data[i] = 255 - data[i]; // red data[i + 1] = 255 - data[i + 1]; // green data[i + 2] =...
... 255 - data[i + 2]; // blue } ctx.putimagedata(imagedata, 0, 0); }; var grayscale = function() { for (var i = 0; i < data.length; i += 4) { var avg = (data[i] + data[i + 1] + data[i + 2]) / 3; data[i] = avg; // red data[i + 1] = avg; // green data[i + 2] = avg; // blue } ctx.putimagedata(imagedata, 0, 0); }; var invertbtn = document.getelementbyid('invertbtn'); invertbtn.addeventlistener('click', invert); var grayscalebtn = document.getelementbyid('grayscalebtn'); grayscalebtn.addeventlistener('click', grayscale); } zooming and anti-aliasing with the help of the drawimage() method, a second canvas and the imagesmoothingenabled property, we are able to zoom into our picture and see the details.
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Transformations - Web APIs
Web › API › Canvas API › Tutorial › Transformations
function draw() { var ctx = document.getelementbyid('canvas').getcontext('2d'); ctx.fillrect(0, 0, 150, 150); // draw a rectangle with default settings ctx.save(); // save the default state ctx.fillstyle = '#09f'; // make changes to the settings ctx.fillrect(15, 15, 120, 120); // draw a rectangle with new settings ctx.save(); // save the current state ctx.fillstyle = '#fff'; // make ...
... function draw() { var ctx = document.getelementbyid('canvas').getcontext('2d'); for (var i = 0; i < 3; i++) { for (var j = 0; j < 3; j++) { ctx.save(); ctx.fillstyle = 'rgb(' + (51 * i) + ', ' + (255 - 51 * i) + ', 255)'; ctx.translate(10 + j * 50, 10 + i * 50); ctx.fillrect(0, 0, 25, 25); ctx.restore(); } } } <canvas id="canvas" width="150" height="150"></canvas> draw(); screenshotlive sample r...
... function draw() { var ctx = document.getelementbyid('canvas').getcontext('2d'); // left rectangles, rotate from canvas origin ctx.save(); // blue rect ctx.fillstyle = '#0095dd'; ctx.fillrect(30, 30, 100, 100); ctx.rotate((math.pi / 180) * 25); // grey rect ctx.fillstyle = '#4d4e53'; ctx.fillrect(30, 30, 100, 100); ctx.restore(); // right rectangles, rotate from rectangle center // draw blue rect ctx.fillstyle = '#00...
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ChildNode - Web APIs
Web › API › ChildNode
it's implemented by element, documenttype, and characterdata objects.
... living standard split the elementtraversal interface in parentnode and childnode.
... previouselementsibling and nextelementsibling are now defined on the latter.
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DataTransfer.setDragImage() - Web APIs
Web › API › DataTransfer › setDragImage
when a drag occurs, a translucent image is generated from the drag target (the element the dragstart event is fired at), and follows the mouse pointer during the drag.
...the image will typically be an <image> element but it can also be a <canvas> or any other visible element.
... syntax void datatransfer.setdragimage(img | element, xoffset, yoffset); arguments img | element an image element element to use for the drag feedback image.
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DataTransferItem.webkitGetAsEntry() - Web APIs
Web › API › DataTransferItem › webkitGetAsEntry
html content the html establishes the drop zone itself, which is a <div> element with the id "dropzone", and an unordered list element with the id "listing".
...this function takes as input a filesystementry representing an entry in the file system to be scanned and processed (the item parameter), and an element into which to insert the list of contents (the container parameter).
... let dropzone = document.getelementbyid("dropzone"); let listing = document.getelementbyid("listing"); function scanfiles(item, container) { let elem = document.createelement("li"); elem.innerhtml = item.name; container.appendchild(elem); if (item.isdirectory) { let directoryreader = item.createreader(); let directorycontainer = document.createelement("ul"); container.appendchild(directorycontainer); directoryreader.readentries(function(entries) { entries.foreach(function(entry) { scanfiles(entry, directorycontainer); }); }); } } sc...
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Document.getBoxObjectFor() - Web APIs
Web › API › Document › getBoxObjectFor
returns a boxobject (x, y, width, height) for a specified element.
...you should use the element.getboundingclientrect() method instead.
... syntax boxobject = document.getboxobjectfor(element); boxobject is an nsiboxobject.
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DocumentOrShadowRoot - Web APIs
Web › API › DocumentOrShadowRoot
properties documentorshadowroot.activeelementread only returns the element within the shadow tree that has focus.
... documentorshadowroot.fullscreenelementread only returns the element that's currently in full screen mode for this document.
... documentorshadowroot.pointerlockelement read only returns the element set as the target for mouse events while the pointer is locked.
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Events and the DOM - Web APIs
Web › API › Document Object Model › Events
registering event listeners there are 3 ways to register event handlers for a dom element.
... eventtarget.addeventlistener // assuming mybutton is a button element mybutton.addeventlistener('click', greet, false) function greet(event){ // print and have a look at the event object // always print arguments in case of overlooking any other arguments console.log('greet:', arguments) alert('hello world') } this is the method you should use in modern web pages.
... dom element properties // assuming mybutton is a button element mybutton.onclick = function(event){alert('hello world')} the function can be defined to take an event parameter.
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Event.composed - Web APIs
Web › API › Event › composed
examples in our composed-composed-path example (see it live), we define two trivial custom elements, <open-shadow> and <closed-shadow>, both of which take the contents of their text attribute and insert them into the element's shadow dom as the text content of a <p> element.
... the first definition looks like this, for example: customelements.define('open-shadow', class extends htmlelement { constructor() { super(); let pelem = document.createelement('p'); pelem.textcontent = this.getattribute('text'); let shadowroot = this.attachshadow({mode: 'open'}) .appendchild(pelem); } }); we then insert one of each element into our page: <open-shadow text="i have an open shadow root"></open-shadow> <closed-shadow text="i have a closed shadow root"></closed-shadow> then include a click event listener on the <html> element: document.queryselector('html').addeventlistener('click',function(e) { console.lo...
...g(e.composed); console.log(e.composedpath()); }); when you click on the <open-shadow> element and then the <closed-shadow> element, you'll notice two things.
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Event.composedPath() - Web APIs
Web › API › Event › composedPath
examples in our composed-composed-path example (see it live), we define two trivial custom elements, <open-shadow> and <closed-shadow>, both of which take the contents of their text attribute and insert them into the element's shadow dom as the text content of a <p> element.
... the first definition looks like this, for example: customelements.define('open-shadow', class extends htmlelement { constructor() { super(); let pelem = document.createelement('p'); pelem.textcontent = this.getattribute('text'); let shadowroot = this.attachshadow({mode: 'open'}) .appendchild(pelem); } }); we then insert one of each element into our page: <open-shadow text="i have an open shadow root"></open-shadow> <closed-shadow text="i have a closed shadow root"></closed-shadow> then include a click event listener on the <html> element: document.queryselector('html').addeventlistener('click',function(e) { console.lo...
...g(e.composed); console.log(e.composedpath()); }); when you click on the <open-shadow> element and then the <closed-shadow> element, you'll notice two things.
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FileSystemDirectoryReader.readEntries() - Web APIs
Web › API › FileSystemDirectoryReader › readEntries
html content the html establishes the drop zone itself, which is a <div> element with the id "dropzone", and an unordered list element with the id "listing".
...this function takes as input a filesystementry representing an entry in the file system to be scanned and processed (the item parameter), and an element into which to insert the list of contents (the container parameter).
... let dropzone = document.getelementbyid("dropzone"); let listing = document.getelementbyid("listing"); function scanfiles(item, container) { let elem = document.createelement("li"); elem.innerhtml = item.name; container.appendchild(elem); if (item.isdirectory) { let directoryreader = item.createreader(); let directorycontainer = document.createelement("ul"); container.appendchild(directorycontainer); directoryreader.readentries(function(entries) { entries.foreach(function(entry) { scanfiles(entry, directorycontainer); }); }); } } sc...
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Using FormData Objects - Web APIs
Web › API › FormData › Using FormData Objects
object from scratch you can build a formdata object yourself, instantiating it then appending fields to it by calling its append() method, like this: var formdata = new formdata(); formdata.append("username", "groucho"); formdata.append("accountnum", 123456); // number 123456 is immediately converted to a string "123456" // html file input, chosen by user formdata.append("userfile", fileinputelement.files[0]); // javascript file-like object var content = '<a id="a"><b id="b">hey!</b></a>'; // the body of the new file...
... retrieving a formdata object from an html form to construct a formdata object that contains the data from an existing <form>, specify that form element when creating the formdata object: note: formdata will only use input fields that use the name attribute.
... var formdata = new formdata(someformelement); for example: var formelement = document.queryselector("form"); var request = new xmlhttprequest(); request.open("post", "submitform.php"); request.send(new formdata(formelement)); you can also append additional data to the formdata object between retrieving it from a form and sending it, like this: var formelement = document.queryselector("form"); var formdata = new formdata(formelement); var request = new xmlhttprequest(); request.open("post", "submitform.php"); formdata.append("serialnumber", serialnumber++); request.send(formdata); this lets you augment the form's data before sending it along, to include additional information that's not necessarily user-editable.
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FullscreenOptions.navigationUI - Web APIs
Web › API › FullscreenOptions › navigationUI
the fullscreenoptions dictionary's navigationui property is used when calling requestfullscreen() to specify to what extent the user agent should include its standard user interface while the element is presented in full-screen mode.
... "hide" the browser's navigation interface will be hidden and the entire dimensions of the screen will be allocated to the display of the element.
... "show" the browser will present page navigation controls and possibly other user interface; the dimensions of the element (and the perceived size of the screen) will be clamped to leave room for this user interface.
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Using the Gamepad API - Web APIs
Web › API › Gamepad API › Using the Gamepad API
var gamepadinfo = document.getelementbyid("gamepad-info"); var ball = document.getelementbyid("ball"); var start; var a = 0; var b = 0; next we use the gamepadconnected event to check for a gamepad being connected.
... var haveevents = 'ongamepadconnected' in window; var controllers = {}; function connecthandler(e) { addgamepad(e.gamepad); } function addgamepad(gamepad) { controllers[gamepad.index] = gamepad; var d = document.createelement("div"); d.setattribute("id", "controller" + gamepad.index); var t = document.createelement("h1"); t.appendchild(document.createtextnode("gamepad: " + gamepad.id)); d.appendchild(t); var b = document.createelement("div"); b.classname = "buttons"; for (var i = 0; i < gamepad.buttons.length; i++) { var e = document.createelement("span"); e.classname = "button"; //e.id = "...
...b" + i; e.innerhtml = i; b.appendchild(e); } d.appendchild(b); var a = document.createelement("div"); a.classname = "axes"; for (var i = 0; i < gamepad.axes.length; i++) { var p = document.createelement("progress"); p.classname = "axis"; //p.id = "a" + i; p.setattribute("max", "2"); p.setattribute("value", "1"); p.innerhtml = i; a.appendchild(p); } d.appendchild(a); // see https://github.com/luser/gamepadtest/blob/master/index.html var start = document.getelementbyid("start"); if (start) { start.style.display = "none"; } document.body.appendchild(d); requestanimationframe(updatestatus); } function disconnecthandler(e) { removegamepad(e.gamepad); } function removegamepad(gamepad) { var d = document.getelementbyid("contro...
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GlobalEventHandlers.oninput - Web APIs
Web › API › GlobalEventHandlers › oninput
the oninput property of the globaleventhandlers mixin is an eventhandler that processes input events on the <input>, <select>, and <textarea> elements.
... it also handles these events on elements where contenteditable or designmode are turned on.
... note: unlike oninput, the onchange event handler is not necessarily called for each alteration to an element's value.
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Image() - Web APIs
Web › API › HTMLImageElement › Image
the image() constructor creates a new htmlimageelement instance.
... it is functionally equivalent to document.createelement('img').
... syntax var htmlimageelement = new image(width, height); parameters width the width of the image (i.e., the value for the width attribute).
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File drag and drop - Web APIs
Web › API › HTML Drag and Drop API › File drag and drop
a target element for the file drop) and to define event handlers for the drop and dragover events.
... define the drop zone the target element of the drop event needs an ondrop global event handler.
... the following code snippet shows how this is done with a <div> element: <div id="drop_zone" ondrop="drophandler(event);"> <p>drag one or more files to this drop zone ...</p> </div> typically, an application will include a dragover event handler on the drop target element and that handler will turn off the browser's default drag behavior.
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IntersectionObserverEntry - Web APIs
Web › API › IntersectionObserverEntry
the intersectionobserverentry interface of the intersection observer api describes the intersection between the target element and its root container at a specific moment of transition.
... properties intersectionobserverentry.boundingclientrect read only returns the bounds rectangle of the target element as a domrectreadonly.
... the bounds are computed as described in the documentation for element.getboundingclientrect().
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KeyframeEffect - Web APIs
Web › API › KeyframeEffect
properties keyframeeffect.target gets and sets the element, or originating element of the pseudo-element, being animated by this object.
... this may be null for animations that do not target a specific element or pseudo-element.
... keyframeeffect.pseudoelement gets and sets the selector of the pseudo-element being animated by this object.
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MediaError.message - Web APIs
Web › API › MediaError › message
example this example creates a <audio> element, establishes an error handler for it, then lets the user click buttons to choose whether to assign a valid audio file or a missing file to the element's src attribute.
... the example creates an <audio> element and lets the user assign either a valid music file to it, or a link to a file which doesn't exist.
... this lets us see the behavior of the error event handler, which is received by an event handler we add to the <audio> element itself.
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MediaStreamAudioSourceNode - Web APIs
Web › API › MediaStreamAudioSourceNode
example in this example, we grab a media (audio + video) stream from navigator.getusermedia, feed the media into a <video> element to play then mute the audio, but then also feed the audio into a mediastreamaudiosourcenode.
... the range slider below the <video> element controls the amount of gain given to the lowpass filter — increase the value of the slider to make the audio sound more bass heavy!
... var pre = document.queryselector('pre'); var video = document.queryselector('video'); var myscript = document.queryselector('script'); var range = document.queryselector('input'); // getusermedia block - grab stream // put it into a mediastreamaudiosourcenode // also output the visuals into a video element if (navigator.mediadevices) { console.log('getusermedia supported.'); navigator.mediadevices.getusermedia ({audio: true, video: true}) .then(function(stream) { video.srcobject = stream; video.onloadedmetadata = function(e) { video.play(); video.muted = true; }; // create a mediastreamaudiosourcenode // feed the htmlmediaelement into it var ...
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MediaStreamTrackAudioSourceNode - Web APIs
Web › API › MediaStreamTrackAudioSourceNode
example in this example, we grab a media (audio + video) stream from navigator.getusermedia, feed the media into a <video> element to play then mute the audio, but then also feed the audio into a mediastreamaudiosourcenode.
... the range slider below the <video> element controls the amount of gain given to the lowpass filter — increase the value of the slider to make the audio sound more bass heavy!
... var pre = document.queryselector('pre'); var video = document.queryselector('video'); var myscript = document.queryselector('script'); var range = document.queryselector('input'); // getusermedia block - grab stream // put it into a mediastreamaudiosourcenode // also output the visuals into a video element if (navigator.mediadevices) { console.log('getusermedia supported.'); navigator.mediadevices.getusermedia ({audio: true, video: true}) .then(function(stream) { video.srcobject = stream; video.onloadedmetadata = function(e) { video.play(); video.muted = true; }; // create a mediastreamaudiosourcenode // feed the htmlmediaelement into it var ...
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msPlayToSource - Web APIs
Web › API › MsPlayToSource
msplaytosource is a read-only property which gets the source associated with the media element for use by the playtomanager.
... syntax ptr = object.msplaytosource; value playto is a means through which an app can connect local playback/display for audio, video, and img elements to a remote device.
... msplaytosource is used in the sourcerequested handler -- get the playtosource object from an audio, video, or img element using the msplaytosource property and pass it to e.setsource, then set the playtosource.next property to the msplaytosource of another element for continual playing.
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Node.baseURI - Web APIs
Web › API › Node › baseURI
the base url is used to resolve relative urls when the browser needs to obtain an absolute url, for example when processing the html <img> element's src attribute or xml xlink:href attribute.
... in most cases the base url is simply the location of the document, but it can be affected by many factors, including the <base> element in html and the xml:base attribute in xml.
... the base url of an element the base url of an element in html normally equals the base url of the document the node is in.
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Node.cloneNode() - Web APIs
Web › API › Node › cloneNode
deep has no effect on empty elements (such as the <img> and <input> elements).
... example let p = document.getelementbyid("para1") let p_prime = p.clonenode(true) notes cloning a node copies all of its attributes and their values, including intrinsic (inline) listeners.
... it does not copy event listeners added using addeventlistener() or those assigned to element properties (e.g., node.onclick = somefunction).
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Node.firstChild - Web APIs
Web › API › Node › firstChild
<p id="para-01"> <span>first span</span> </p> <script> var p01 = document.getelementbyid('para-01'); console.log(p01.firstchild.nodename); </script> in the above, the console will show '#text' because a text node is inserted to maintain the whitespace between the end of the opening <p> and <span> tags.
... if this whitespace is removed from the source, the #text nodes are not inserted and the span element becomes the paragraph's first child.
... <p id="para-01"><span>first span</span></p> <script> var p01 = document.getelementbyid('para-01'); console.log(p01.firstchild.nodename); </script> now the console will show 'span'.
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Node.namespaceURI - Web APIs
Web › API › Node › namespaceURI
in dom4 this api was moved from node to the element and attr interfaces.
... in firefox 3.5 and earlier, the namespace uri for html elements in html documents is null.
... for nodes of any node.nodetype other than element_node and attribute_node the value of namespaceuri is always null.
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Node.nextSibling - Web APIs
Web › API › Node › nextSibling
the node.nextsibling read-only property returns the node immediately following the specified one in their parent's childnodes, or returns null if the specified node is the last child in the parent element.
...therefore a node obtained, for example, using node.firstchild or node.previoussibling may refer to a whitespace text node rather than the actual element the author intended to get.
... element.nextelementsibling may be used to obtain the next element skipping any whitespace nodes, other between-element text, or comments.
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OffscreenCanvas - Web APIs
Web › API › OffscreenCanvas
to display the imagebitmap, you can use a imagebitmaprenderingcontext context, which can be created by calling canvas.getcontext("bitmaprenderer") on a (visible) canvas element.
... given these two <canvas> elements <canvas id="one"></canvas> <canvas id="two"></canvas> the following code will provide the rendering using an offscreencanvas as described above.
... var one = document.getelementbyid("one").getcontext("bitmaprenderer"); var two = document.getelementbyid("two").getcontext("bitmaprenderer"); var offscreen = new offscreencanvas(256, 256); var gl = offscreen.getcontext('webgl'); // ...
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ParentNode.children - Web APIs
Web › API › ParentNode › children
the parentnode property children is a read-only property that returns a live htmlcollection which contains all of the child elements of the node upon which it was called.
... syntax let children = node.children; value an htmlcollection which is a live, ordered collection of the dom elements which are children of node.
... if the node has no element children, then children is an empty list with a length of 0.
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PasswordCredential - Web APIs
Web › API › PasswordCredential › PasswordCredential
syntax var mycredential = new passwordcredential(passwordcredentialdata) var mycredential = new passwordcredential(htmlformelement) parameters either of the following: passwordcredentialdata a passwordcredentialdata dictionary containing the following fields: iconurl: (optional) the url of a user's avatar image.
... htmlformelement a reference to an htmlformelement with appropriate input fields.
... examples this example shows how to set up an htmlformelement to caputure data which we'll use to create a passwordcredential object.
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Range.setStart() - Web APIs
Web › API › Range › setStart
examples highlight part of an element this example uses the range.setstart() and range.setend() methods to add part of an address to a range.
... the address contains nine nodes: five text nodes, and four <br> elements.
...main st.<br> dodge city, ks<br> 67801<br> usa</p> <hr> <p>nodes in the original address:</p> <ol id="log"></ol> javascript const address = document.getelementbyid('address'); const log = document.getelementbyid('log'); // log info address.childnodes.foreach(node => { const li = document.createelement('li'); li.textcontent = `${node.nodename}, ${node.nodevalue}`; log.appendchild(li); }); // highlight the street and city const startoffset = 2; // start at third node: 101 e.
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ResizeObserverEntry.borderBoxSize - Web APIs
Web › API › ResizeObserverEntry › borderBoxSize
the borderboxsize read-only property of the resizeobserverentry interface returns an array containing the new border box size of the observed element when the callback is run.
... syntax var myborderboxsize = resizeobserverentry.borderboxsize; value an array containing objects with the new border box size of the observed element.
... the array is necessary to support elements that have multiple fragments, which occur in multi-column scenarios.
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ResizeObserverEntry - Web APIs
Web › API › ResizeObserverEntry
the resizeobserverentry interface represents the object passed to the resizeobserver() constructor's callback function, which allows you to access the new dimensions of the element or svgelement being observed.
... properties resizeobserverentry.borderboxsize read only an object containing the new border box size of the observed element when the callback is run.
... resizeobserverentry.contentboxsize read only an object containing the new content box size of the observed element when the callback is run.
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SVGFilterPrimitiveStandardAttributes - Web APIs
Web › API › SVGFilterPrimitiveStandardAttributes
"181" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgfilterprimitivestandardattributes</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties svgfilterprimitivestandardattributes.x read only an svganimatedlength corresponding to the x attribute of the given element.
... svgfilterprimitivestandardattributes.y read only an svganimatedlength corresponding to the y attribute of the given element.
... svgfilterprimitivestandardattributes.width read only an svganimatedlength corresponding to the width attribute of the given element.
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Slottable: assignedSlot - Web APIs
Web › API › Slottable › assignedSlot
the assignedslot read-only property of the slottable interface returns an htmlslotelement representing the <slot> element the node is inserted in.
... syntax var slotelement = elementinstance.assignedslot value an htmlslotelement instance, or null if the element is not assigned to a slot, or if the associated shadow root was attached with its mode set to closed (see element.attachshadow for further details).
... examples in our simple-template example (see it live), we create a trivial custom element example called <my-paragraph> in which a shadow root is attached and then populated using the contents of a template that contains a slot named my-text.
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StylePropertyMapReadOnly - Web APIs
Web › API › StylePropertyMapReadOnly
retrieve an instance of this interface using element.computedstylemap().
... stylepropertymapreadonly.foreach() executes a provided function once for each element of stylepropertymapreadonly.
... examples we have to have an element to observe: <p> this is a paragraph with some text.
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TextTrack: cuechange event - Web APIs
Web › API › TextTrack › cuechange event
the event is fired at both the texttrack and at the htmltrackelement in which it's being presented, if any.
...n the texttrack you can set up a listener for the cuechange event on a texttrack using the addeventlistener() method: track.addeventlistener('cuechange', function () { let cues = track.activecues; // array of current cues }); or you can just set the oncuechange event handler property: track.oncuechange = function () { let cues = track.activecues; // array of current cues } on the track element the underlying texttrack, indicated by the track property, receives a cuechange event every time the currently-presented cue is changed.
... this happens even if the track isn't associated with a media element.
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TextTrackList.onremovetrack - Web APIs
Web › API › TextTrackList › onremovetrack
the texttracklist onremovetrack event handler is called when the removetrack event occurs, indicating that a text track has been removed from the media element, and therefore also from the texttracklist.
... the event is passed into the event handler in the form of a trackevent object, whose track property identifies the track that was removed from the media element's texttracklist.
... syntax texttracklist.onremovetrack = eventhandler; value set onremovetrack to a function that accepts as input a trackevent object which indicates in its track property which text track has been removed from the media element.
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VideoPlaybackQuality - Web APIs
Web › API › VideoPlaybackQuality
a videoplaybackquality object is returned by the htmlvideoelement.getvideoplaybackquality() method and contains metrics that can be used to determine the playback quality of a video.
... droppedvideoframes read only an unsigned long giving the number of video frames dropped since the creation of the associated htmlvideoelement.
... totalvideoframes read only an unsigned long giving the number of video frames created and dropped since the creation of the associated htmlvideoelement.
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VideoTrackList.onremovetrack - Web APIs
Web › API › VideoTrackList › onremovetrack
the videotracklist onremovetrack event handler is called when the removetrack event occurs, indicating that a video track has been removed from the media element, and therefore also from the videotracklist.
... the event is passed into the event handler in the form of a trackevent object, whose track property identifies the track that was removed from the media element's videotracklist.
... syntax videotracklist.onremovetrack = eventhandler; value set onremovetrack to a function that accepts as input a trackevent object which indicates in its track property which video track has been removed from the media element.
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VisualViewport - Web APIs
Web › API › VisualViewport
for an <iframe>, visual viewport metrics like visualviewport.width always correspond to layout viewport metrics like document.documentelement.clientwidth.
... var bottombar = document.getelementbyid('bottombar'); var viewport = window.visualviewport; function resizehandler() { if (viewport.scale > 1.3) bottombar.style.display = "none"; else bottombar.style.display = "block"; } window.visualviewport.addeventlistener('resize', resizehandler); simulating position: device-fixed this example, also taken from the visual viewport readme, shows how to use this api to simulate...
... position: device-fixed, which fixes elements to the visual viewport.
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Visual Viewport API - Web APIs
Web › API › Visual Viewport API
the layout viewport covers all the elements on a page and the visual viewport is what is actually visible on the screen.
... what happens when a web page element needs to be visible on screen regardless of the visible portion of a web page?
...the visual viewport lets web developers solve this by positioning elements relative to what's shown on screen.
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WebGLRenderingContext.texSubImage2D() - Web APIs
Web › API › WebGLRenderingContext › texSubImage2D
pixels); void gl.texsubimage2d(target, level, xoffset, yoffset, format, type, htmlimageelement?
... pixels); void gl.texsubimage2d(target, level, xoffset, yoffset, format, type, htmlcanvaselement?
... pixels); void gl.texsubimage2d(target, level, xoffset, yoffset, format, type, htmlvideoelement?
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Writing WebSocket client applications - Web APIs
Web › API › WebSockets API › Writing WebSocket client applications
var msg = { type: "message", text: document.getelementbyid("text").value, id: clientid, date: date.now() }; // send the msg object as a json-formatted string.
... examplesocket.send(json.stringify(msg)); // blank the text input element, ready to receive the next line of text from the user.
... document.getelementbyid("text").value = ""; } receiving messages from the server websockets is an event-driven api; when messages are received, a message event is sent to the websocket object.
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Window.requestAnimationFrame() - Web APIs
Web › API › Window › requestAnimationFrame
example in this example, an element is animated for 2 seconds (2000 milliseconds).
... the element moves at a speed of 0.1px/ms to the right, so its relative position (in css pixels) can be calculated in function of the time elapsed since the start of the animation (in milliseconds) with 0.1 * elapsed.
... the element's final position is 200px (0.1 * 2000) to the right of its initial position.
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XMLSerializer - Web APIs
Web › API › XMLSerializer
serializetostream() the subtree rooted by the specified element is serialized to a byte stream using the character set specified.
... inserting nodes into a dom based on xml this example uses the element.insertadjacenthtml() method to insert a new dom node into the body of the document, based on xml created by serializing an element object.
... note: in the real world, you should usually instead call importnode() method to import the new node into the dom, then call one of the following methods to add the node to the dom tree: the document and element methods append() and prepend() the node.replacewith() method (to replace an existing node with the new one) the document.insertadjacentelement() and element.insertadjacentelement() methods.
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ARIA: alert role - Accessibility
Web › Accessibility › ARIA › Roles › Alert Role
the alert role can be used to tell the user an element has been dynamically updated.
... description one of the five live region roles, the alert role is used to provide the user with important, and usually time-sensitive, information, and often to tell the user an element has been dynamically updated.
... the alert role is added to the node containing an alert message, not the element causing the alert to be triggered.
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ARIA: Complementary role - Accessibility
Web › Accessibility › ARIA › Roles › Complementary role
if possible, use the html <aside> element instead.
... using the <aside> element will automatically communicate a section has a role of complementary.
... developers should always prefer using the correct semantic html element over using aria.
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ARIA: grid role - Accessibility
Web › Accessibility › ARIA › Roles › Grid Role
while it does not imply a specific visual presentation, it implies a relationship among elements.
...see aria authoring practices for more details cell elements have the role gridcell, unless they are a row or column header.
... then the elements are rowheader and columnheader, respectively.
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ARIA: Listitem role - Accessibility
Web › Accessibility › ARIA › Roles › Listitem role
<section role="list"> <div role="listitem">list item 1</div> <div role="listitem">list item 2</div> <div role="listitem">list item 3</div> </section> description any content that consists of an outer container with a list of elements inside it can be identified to assistive technologies using the list and listitem containers respectively.
... there are no hard and fast rules about which elements you should use to markup the list and list items, but you should make sure that the list items make sense in the context of a list, e.g.
... warning: if at all possible in your work, you should use the appropriate semantic html elements to mark up a list and its listitems — <ul>/<ol> and <li>.
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ARIA: Main role - Accessibility
Web › Accessibility › ARIA › Roles › Main role
the <main> element has a role of main.
... developers should always prefer using the correct semantic html element over using aria.
... documents and applications can be nested in the dom, which may lead to having more than one main element as dom descendants.
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ARIA: Mark role - Accessibility
Web › Accessibility › ARIA › Roles › Mark role
the mark landmark role semantically denotes html elements containing text that is marked/highlighted for reference purposes.
... this is semantically equivalent to the html <mark> element.
... if possible, you should use this element instead.
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Perceivable - Accessibility
Web › Accessibility › Understanding WCAG › Perceivable
ui controls such as form elements and buttons should have text labels that describe their purpose.
... if you have to include an image via an <img> element, give it a blank alt (alt="").
...the main situations in which this is relevant are: text labels and the form elements they describe.
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::first-line (:first-line) - CSS: Cascading Style Sheets
Web › CSS › ::first-line
the ::first-line css pseudo-element applies styles to the first line of a block-level element.
... note that the length of the first line depends on many factors, including the width of the element, the width of the document, and the font size of the text.
... /* selects the first line of a <p> */ p::first-line { color: red; } css3 introduced the ::first-line notation (with two colons) to distinguish pseudo-classes from pseudo-elements.
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:dir() - CSS: Cascading Style Sheets
Web › CSS › :dir
the :dir() css pseudo-class matches elements based on the directionality of the text contained in them.
... /* selects any element with right-to-left text */ :dir(rtl) { background-color: red; } the :dir() pseudo-class uses only the semantic value of the directionality, i.e., the one defined in the document itself.
...the latter match the html dir attribute, and ignore elements that lack it — even if they inherit a direction from their parent.
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:empty - CSS: Cascading Style Sheets
Web › CSS › :empty
the :empty css pseudo-class represents any element that has no children.
... children can be either element nodes or text (including whitespace).
... comments, processing instructions, and css content do not affect whether an element is considered empty.
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:fullscreen - CSS: Cascading Style Sheets
Web › CSS › :fullscreen
the :fullscreen css pseudo-class matches every element which is currently in full-screen mode.
... if multiple elements have been put into full-screen mode, this selects them all.
... syntax :fullscreen usage notes the :fullscreen pseudo-class lets you configure your stylesheets to automatically adjust the size, style, or layout of content when elements switch back and forth between full-screen and traditional presentations.
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:has() - CSS: Cascading Style Sheets
Web › CSS › :has
the :has() css pseudo-class represents an element if any of the selectors passed as parameters (relative to the :scope of the given element) match at least one element.
... /* selects any <a>, as long as it has an <img> element directly inside it */ /* note that this is not supported in any browser yet */ let test = document.queryselector('a:has(> img)'); syntax :has( <relative-selector-list> )where <relative-selector-list> = <relative-selector>#where <relative-selector> = <combinator>?
...<subclass-selector>* [ <pseudo-element-selector> <pseudo-class-selector>* ]* ]!where <type-selector> = <wq-name> | <ns-prefix>?
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:hover - CSS: Cascading Style Sheets
Web › CSS › :hover
the :hover css pseudo-class matches when the user interacts with an element with a pointing device, but does not necessarily activate it.
... it is generally triggered when the user hovers over an element with the cursor (mouse pointer).
... /* selects any <a> element when "hovered" */ a:hover { color: orange; } styles defined by the :active pseudo-class will be overridden by any subsequent link-related pseudo-class (:link, :visited, or :active) that has at least equal specificity.
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:is() (:matches(), :any()) - CSS: Cascading Style Sheets
Web › CSS › :is
the :is() css pseudo-class function takes a selector list as its argument, and selects any element that can be selected by one of the selectors in that list.
... /* selects any paragraph inside a header, main or footer element that is being hovered */ :is(header, main, footer) p:hover { color: red; cursor: pointer; } /* the above is equivalent to the following */ header p:hover, main p:hover, footer p:hover { color: red; cursor: pointer; } /* backwards-compatible version with :-*-any() and :matches() (it is not possible to group selectors into single rule, because presence of invalid selector would inva...
...<subclass-selector>* [ <pseudo-element-selector> <pseudo-class-selector>* ]* ]!<combinator> = '>' | '+' | '~' | [ '|' ]where <type-selector> = <wq-name> | <ns-prefix>?
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:visited - CSS: Cascading Style Sheets
Web › CSS › :visited
the alpha component of the element's non-:visited state will be used instead, except when that component is 0, in which case the style set in :visited will be ignored entirely.
... recommendation lifts the restriction to only apply :visited to the <a> element.
... full support 18firefox android full support 4opera android full support 10.1safari ios full support 1samsung internet android full support 1.0:visited no longer matches <link> elementschrome full support 1notes full support 1notes notes chromium has never matched <link> elements with link pseudo-classes.edge full support 12firefox full support 70ie no support ...
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:where() - CSS: Cascading Style Sheets
Web › CSS › :where
the :where() css pseudo-class function takes a selector list as its argument, and selects any element that can be selected by one of the selectors in that list.
...they differ by the classes used to mark the child elements.
... footer a { color: blue; } this won't work for the red links, because the selectors inside :is() count towards the specificity of the overall selector, and class selectors have a higher specificity than element selectors.
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Detecting CSS animation support - CSS: Cascading Style Sheets
Web › CSS › CSS Animations › Detecting CSS animation support
testing for css animation support this code will check to see if css animation support is available: var animation = false, animationstring = 'animation', keyframeprefix = '', domprefixes = 'webkit moz o ms khtml'.split(' '), pfx = '', elem = document.createelement('div'); if( elem.style.animationname !== undefined ) { animation = true; } if( animation === false ) { for( var i = 0; i < domprefixes.length; i++ ) { if( elem.style[ domprefixes[i] + 'animationname' ] !== undefined ) { pfx = domprefixes[ i ]; animationstring = pfx + 'animation'; keyframeprefix = '-' + pfx.tolowercase() + '-'; animation = true; break; } ...
... then we check if the css animation-name property on the style collection for the element specified by the variable elem is set.
... keyframes = '@' + keyframeprefix + 'keyframes rotate { '+ 'from {' + keyframeprefix + 'transform:rotate( 0deg ) }'+ 'to {' + keyframeprefix + 'transform:rotate( 360deg ) }'+ '}'; if( document.stylesheets && document.stylesheets.length ) { document.stylesheets[0].insertrule( keyframes, 0 ); } else { var s = document.createelement( 'style' ); s.innerhtml = keyframes; document.getelementsbytagname( 'head' )[ 0 ].appendchild( s ); } } this code looks at the value of animation; if it's false, we know we need to use our javascript fallback code to perform our animation.
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CSS Animations tips and tricks - CSS: Cascading Style Sheets
Web › CSS › CSS Animations › Tips
css animations make it possible to do incredible things with the elements that make up your documents and apps.
...there's no magic resetanimation() method on elements, and you can't even just set the element's animation-play-state to "running" again.
...that's because the only way to play an animation again is to remove the animation effect, let the document recompute styles so that it knows you've done that, then add the animation effect back to the element.
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Handling content breaks in multicol - CSS: Cascading Style Sheets
Web › CSS › CSS Columns › Handling content breaks in multicol
there are various places we might want to control our breaks: breaks inside boxes, for example inside a figure element.
...this property takes values of: auto avoid avoid-page avoid-column avoid-region in the example below, we have applied break-inside to the figure element to prevent the caption from becoming separated from the image.
... breaks before and after boxes the break-before and break-after properties are used to control breaks before and after elements.
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Typical use cases of Flexbox - CSS: Cascading Style Sheets
Web › CSS › CSS Flexible Box Layout › Typical Use Cases of Flexbox
as in the above example, make a container into a flex container, and then use either align-items on the parent element or target the flex item itself with align-self.
... media objects the media object is a common pattern in web design — this pattern has an image or other element to one side and text to the right.
...forms have lots of markup and lots of small elements that we typically want to align with each other.
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Using z-index - CSS: Cascading Style Sheets
Web › CSS › CSS Positioning › Understanding z index › Adding z-index
if you want to create a custom stacking order, you can use the z-index property on a positioned element.
... the z-index property can be specified with an integer value (positive, zero, or negative), which represents the position of the element along the z-axis.
... top layer (closest to the observer) notes: when no z-index property is specified, elements are rendered on the default rendering layer 0 (zero).
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Stacking context example 1 - CSS: Cascading Style Sheets
Web › CSS › CSS Positioning › Understanding z index › Stacking context example 1
without z-indexes, elements are stacked in order of occurrence.
... in this last example you can see that div #2 and div #4 are not siblings, because they belong to different parents in the html elements' hierarchy.
... in terms of stacking contexts, div #1 and div #3 are simply assimilated into the root element, and the resulting hierarchy is the following: root stacking context div #2 (z-index 1) div #4 (z-index 2) note: div #1 and div #3 are not translucent.
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Basic concepts of CSS Scroll Snap - CSS: Cascading Style Sheets
Web › CSS › CSS Scroll Snap › Basic concepts
the scroll-snap-align property must be used on child elements in order to set the position that scrolling will snap to.
... the below example demonstrates scroll snapping along the y axis, with scroll-snap-align used on the section element to dictate the point the scrolling should stop.
... this is potentially useful if you have a fixed element, for example a navigation bar, which could end up overlapping scrolled content.
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Using the :target pseudo-class in selectors - CSS: Cascading Style Sheets
Web › CSS › CSS Selectors › Using the :target pseudo-class in selectors
picking a target the pseudo-class :target is used to style the target element of a url containing a fragment identifier.
... suppose you wish to style any h2 element that is the target of a url, but do not want any other kind of element to get a target style.
...thus, to add a border to the #example fragment, we would write: #example:target { border: 1px solid black; } targeting all elements if the intent is to create a "blanket" style that will apply to all targeted elements, then the universal selector comes in handy: :target { color: red; } example in the following example, there are five links that point to elements in the same document.
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Shorthand properties - CSS: Cascading Style Sheets
Web › CSS › Shorthand properties
inherit sets the property value applied to a selected element to be the same as that of its parent element.
... initial sets the property value applied to a selected element to the initial value of that property.
...this sets the color of the <a> element nested inside to inherit.
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Viewport concepts - CSS: Cascading Style Sheets
Web › CSS › Viewport concepts
if you query the width or height of the window and document in chrome or firefox, you may get: document.documentelement.clientwidth /* 1200 */ window.innerwidth /* 1200 */ window.outerwidth /* 1200 */ document.documentelement.clientheight /* 800 */ window.innerheight /* 800 */ window.outerheight /* 900 */ there are several dom properties that can help you query viewport size, and other similar lengths: the document element's element.clientwidth is the inner width of a document in css pixels, including paddi...
...when zoomed in you may get: document.documentelement.clientwidth /* 800 */ window.innerwidth /* 800 */ window.outerwidth /* 800 in firefox, 1200 in chrome */ document.documentelement.clientheight /* 533 */ window.innerheight /* 533 */ window.outerheight /* 596 in firefox, 900 in chrome */ the viewport was originally 1200 x 800 pixels.
...they are actually relative to the viewport, which is the window in the main document but is the intrinsic size of the element's parent in a nested browsing context like objects, iframes and svg.
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animation-delay - CSS: Cascading Style Sheets
Web › CSS › animation-delay
the animation-delay css property specifies the amount of time to wait from applying the animation to an element before beginning to perform the animation.
... syntax /* single animation */ animation-delay: 3s; animation-delay: 0s; animation-delay: -1500ms; /* multiple animations */ animation-delay: 2.1s, 480ms; values <time> the time offset, from the moment at which the animation is applied to the element, at which the animation should begin.
...if you specify a negative value for the animation delay, but the starting value is implicit, the starting value is taken from the moment the animation is applied to the element.
...And 2 more matches
backface-visibility - CSS: Cascading Style Sheets
Web › CSS › backface-visibility
the backface-visibility css property sets whether the back face of an element is visible when turned towards the user.
... an element's back face is a mirror image of its front face.
... though invisible in 2d, the back face can become visible when a transformation causes the element to be rotated in 3d space.
...And 2 more matches
background-attachment - CSS: Cascading Style Sheets
Web › CSS › background-attachment
even if an element has a scrolling mechanism, the background doesn't move with the element.
... (this is not compatible with background-clip: text.) local the background is fixed relative to the element's contents.
... if the element has a scrolling mechanism, the background scrolls with the element's contents, and the background painting area and background positioning area are relative to the scrollable area of the element rather than to the border framing them.
...And 2 more matches
background-image - CSS: Cascading Style Sheets
Web › CSS › background-image
the background-image css property sets one or more background images on an element.
... the borders of the element are then drawn on top of them, and the background-color is drawn beneath them.
... mdn understanding wcag, guideline 1.1 explanations understanding success criterion 1.1.1 | w3c understanding wcag 2.0 formal definition initial valuenoneapplies toall elements.
...And 2 more matches
border-image-slice - CSS: Cascading Style Sheets
Web › CSS › border-image-slice
these regions form the components of an element's border image.
...these are repeated, scaled, or otherwise modified in the final border image to match the dimensions of the element.
...for vector images, the number is relative to the element's size, not the size of the source image, so percentages are generally preferable in these cases.
...And 2 more matches
box-decoration-break - CSS: Cascading Style Sheets
Web › CSS › box-decoration-break
the box-decoration-break css property specifies how an element's fragments should be rendered when broken across multiple lines, columns, or pages.
... values slice the element is initially rendered as if its box were not fragmented, after which the rendering for this hypothetical box is sliced into pieces for each line/column/page.
... formal definition initial valuesliceapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax slice | clone examples inline box fragments an inline element that contains line breaks styled with: .example { background: linear-gradient(to bottom right, yellow, green); box-shadow: 8px 8px 10px 0px deeppink, -5px -5px 5px 0px blue, 5px 5px 15px 0px yellow; padding: 0em 1em; border-radius: 16px;...
...And 2 more matches
box-ordinal-group - CSS: Cascading Style Sheets
Web › CSS › box-ordinal-group
the box-ordinal-group css property assigns the flexbox's child elements to an ordinal group.
...when the computed box-direction is normal, a box will display its elements starting from the lowest numbered ordinal group and ensure that those elements appear to the left (for horizontal boxes) or at the top (for vertical boxes) of the container.
... elements with the same ordinal group are flowed in the order they appear in the source document tree.
...And 2 more matches
break-after - CSS: Cascading Style Sheets
Web › CSS › break-after
ter: avoid-page; break-after: page; break-after: left; break-after: right; break-after: recto; break-after: verso; /* column break values */ break-after: avoid-column; break-after: column; /* region break values */ break-after: avoid-region; break-after: region; /* global values */ break-after: inherit; break-after: initial; break-after: unset; each possible break point (in other words, each element boundary) is affected by three properties: the break-after value of the previous element, the break-before value of the next element, and the break-inside value of the containing element.
...if more than one of them are such a break, the one of the element that appears the latest in the flow is taken (i.e., the break-before value has precedence over the break-after value, which itself has precedence over the break-inside value).
... once forced breaks have been applied, soft breaks may be added if needed, but not on element boundaries that resolve in a corresponding avoid value.
...And 2 more matches
break-before - CSS: Cascading Style Sheets
Web › CSS › break-before
age; break-before: page; break-before: left; break-before: right; break-before: recto; break-before: verso; /* column break values */ break-before: avoid-column; break-before: column; /* region break values */ break-before: avoid-region; break-before: region; /* global values */ break-before: inherit; break-before: initial; break-before: unset; each possible break point (in other words, each element boundary) is affected by three properties: the break-after value of the previous element, the break-before value of the next element, and the break-inside value of the containing element.
...if more than one of them are such a break, the one of the element that appears the latest in the flow is taken (i.e., the break-before value has precedence over the break-after value, which itself has precedence over the break-inside value).
... once forced breaks have been applied, soft breaks may be added if needed, but not on element boundaries that resolve in a corresponding avoid value.
...And 2 more matches
color-adjust - CSS: Cascading Style Sheets
Web › CSS › color-adjust
the color-adjust css property sets what, if anything, the user agent may do to optimize the appearance of the element on the output device.
... by default, the browser is allowed to make any adjustments to the element's appearance it determines to be necessary and prudent given the type and capabilities of the output device.
... values economy the user agent is allowed to make adjustments to the element as it deems appropriate and prudent in order to optimize the output for the device it's being rendered for.
...And 2 more matches
list-style-type - CSS: Cascading Style Sheets
Web › CSS › list-style-type
the list-style-type css property sets the marker (such as a disc, character, or custom counter style) of a list item element.
... the color of the marker will be the same as the computed color of the element it applies to.
... only a few elements (<li> and <summary>) have a default value of display: list-item.
...And 2 more matches
margin-left - CSS: Cascading Style Sheets
Web › CSS › margin-left
the margin-left css property sets the margin area on the left side of an element.
...in this case, it is set to the value centering the element inside its parent.
... block layout mode block, inline, inline-block, block, table, inline-table, list-item, table-caption left or right static or relative 0 block layout mode (floating element) any table-*, except table-caption any any 0 internal table-* elements don't have margins, use border-spacing instead any, except flex, inline-flex, or table-* any fixed or absolute 0, except if both margin-left and margin-right are set to auto.
...And 2 more matches
margin-right - CSS: Cascading Style Sheets
Web › CSS › margin-right
the margin-right css property sets the margin area on the right side of an element.
...in this case, it is set to the value centering the element inside its parent.
... block layout mode block, inline, inline-block, block, table, inline-table, list-item, table-caption left or right static or relative 0 block layout mode (floating element) any table-*, except table-caption any any 0 internal table-* elements don't have margins, use border-spacing instead any, except flex, inline-flex, or table-* any fixed or absolute 0, except if both margin-left and margin-right are set to auto.
...And 2 more matches
mask-border-slice - CSS: Cascading Style Sheets
Web › CSS › mask-border-slice
these regions are used to form the components of an element's mask border.
...for vector images, the number is relative to the element's size, not the size of the source image, so percentages are generally preferable in these cases.
...these are repeated, scaled, or otherwise modified in the final border image to match the dimensions of the element.
...And 2 more matches
mask-border - CSS: Cascading Style Sheets
Web › CSS › mask-border
the mask-border css shorthand property lets you create a mask along the edge of an element's border.
... <'mask-border-outset'> the distance of the border mask from the element's outside edge.
... formal definition initial valueas each of the properties of the shorthand:mask-border-mode: alphamask-border-outset: 0mask-border-repeat: stretchmask-border-slice: 0mask-border-source: nonemask-border-width: autoapplies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednopercentagesas each of the properties of the shorthand:mask-border-slice: refer to size of the mask border imagemask-border-width: relative to width/height of the mask border image areacomputed valueas each of the properties of the shorthand:mask-border-mode: as specifiedmask-border-outset: as...
...And 2 more matches
mask-clip - CSS: Cascading Style Sheets
Web › CSS › mask-clip
the painted content of an element must be restricted to this area.
...if a viewbox attribute is specified for the element creating the svg viewport, the reference box is positioned at the origin of the coordinate system established by the viewbox attribute and the dimension of the reference box is set to the width and height values of the viewbox attribute.
... text this keyword clips the mask image to the text of the element.
...And 2 more matches
mask-origin - CSS: Cascading Style Sheets
Web › CSS › mask-origin
n-box; mask-origin: fill-box; mask-origin: stroke-box; mask-origin: view-box; /* multiple values */ mask-origin: padding-box, content-box; mask-origin: view-box, fill-box, border-box; /* non-standard keyword values */ -webkit-mask-origin: content; -webkit-mask-origin: padding; -webkit-mask-origin: border; /* global values */ mask-origin: inherit; mask-origin: initial; mask-origin: unset; for elements rendered as a single box, this property specifies the mask positioning area.
...for elements rendered as multiple boxes, such as inline boxes on several lines or boxes on several pages, it specifies which boxes box-decoration-break operates upon to determine the mask positioning area.
...if a viewbox attribute is specified for the element creating the svg viewport, the reference box is positioned at the origin of the coordinate system established by the viewbox attribute and the dimension of the reference box is set to the width and height values of the viewbox attribute.
...And 2 more matches
min-height - CSS: Cascading Style Sheets
Web › CSS › min-height
the min-height css property sets the minimum height of an element.
... the element's height is set to the value of min-height whenever min-height is larger than max-height or height.
... auto the browser will calculate and select a min-height for the specified element.
...And 2 more matches
offset-anchor - CSS: Cascading Style Sheets
Web › CSS › offset-anchor
the offset-anchor css property specifies the point inside the box of an element travelling along an offset-path that is actually moving along the path.
... /* <percentage> values */ offset-anchor: 25% 75%; /* <length> values */ offset-anchor: 0 0; offset-anchor: 1cm 2cm; offset-anchor: 10ch 8em; /* edge offsets values */ offset-anchor: bottom 10px right 20px; offset-anchor: right 3em bottom 10px; /* global values */ offset-anchor: inherit; offset-anchor: initial; offset-anchor: unset; values auto offset-anchor is given the same value as the element's transform-origin, unless offset-path is none, in which case it takes its value from offset-position.
... <position> a <position> defines an x/y coordinate, to place an item relative to the edges of an element's box.
...And 2 more matches
offset-path - CSS: Cascading Style Sheets
Web › CSS › offset-path
the offset-path css property specifies a motion path for an element to follow and defines the element's positioning within the parent container or svg coordinate system.
... description this property defines a path an animated element can follow.
...the element’s exact position on the offset path is determined by the offset-distance property.
...And 2 more matches
offset-rotate - CSS: Cascading Style Sheets
Web › CSS › offset-rotate
the offset-rotate css property defines the orientation/direction of the element as it is positioned along the offset-path.
... syntax /* follow the path direction, with optional additional angle */ offset-rotate: auto; offset-rotate: auto 45deg; /* follow the path direction but facing the opposite direction of `auto` */ offset-rotate: reverse; /* keep a constant rotation regardless the position on the path */ offset-rotate: 90deg; offset-rotate: .5turn; auto the element is rotated by the angle of the direction of the offset-path, relative to the positive x-axis.
... <angle> the element has a constant clockwise rotation transformation applied to it by the specified rotation angle.
...And 2 more matches
outline - CSS: Cascading Style Sheets
Web › CSS › outline
note: the outline will be invisible for many elements if its style is not defined.
...a notable exception is input elements, which are given default styling by browsers.
...however, outlines differ from borders in the following ways: outlines never take up space, as they are drawn outside of an element's content.
...And 2 more matches
page-break-inside - CSS: Cascading Style Sheets
Web › CSS › page-break-inside
the page-break-inside css property adjusts page breaks inside the current element.
... avoid avoid page breaks inside the element.
...a subset of values should be aliased as follows: page-break-inside break-inside auto auto avoid avoid formal definition initial valueautoapplies toblock-level elements in the normal flow of the root element.
...And 2 more matches
scroll-snap-coordinate - CSS: Cascading Style Sheets
Web › CSS › scroll-snap-coordinate
the scroll-snap-coordinate css property defines the x and y coordinate positions within an element that will align with its nearest ancestor scroll container's scroll-snap-destination for each respective axis.
... /* keyword value */ scroll-snap-coordinate: none; /* <position> values */ scroll-snap-coordinate: 50px 50px; /* single coordinate */ scroll-snap-coordinate: 100px 100px, 100px bottom; /* multiple coordinates */ /* global values */ scroll-snap-coordinate: inherit; scroll-snap-coordinate: initial; scroll-snap-coordinate: unset; if the element has been transformed, the snap coordinates are likewise transformed, thus aligning the snap points with the element as it is displayed.
... syntax values none specifies that the element does not contribute to a snap point.
...And 2 more matches
<shape> - CSS: Cascading Style Sheets
Web › CSS › shape
the region represents the part of an element to which the clip property applies.
... rect() rect(top, right, bottom, left) values top is a <length> representing the offset for the top of the rectangle relative to the top border of the element's box.
... right is a <length> representing the offset for the right of the rectangle relative to the left border of the element's box.
...And 2 more matches
text-decoration-skip - CSS: Cascading Style Sheets
Web › CSS › text-decoration-skip
the text-decoration-skip css property sets what parts of an element’s content any text decoration affecting the element must skip over.
... it controls all text decoration lines drawn by the element and also any text decoration lines drawn by its ancestors.
... objects the entire margin box of the element is skipped if it is an atomic inline such as an image or inline-block.
...And 2 more matches
text-underline-offset - CSS: Cascading Style Sheets
Web › CSS › text-underline-offset
while an element can have multiple text-decoration lines, text-underline-offset only impacts underlining, and not other possible line decoration options such as overline or line-through.
... <percentage> specifies the offset of underlines as a <percentage> of 1 em in the element's font.
...for a given application of this property, the offset is constant across the whole box that the underline is applied to, even if there are child elements with different font sizes or vertical alignment.
...And 2 more matches
width - CSS: Cascading Style Sheets
Web › CSS › width
the width css property sets an element's width.
... auto the browser will calculate and select a width for the specified element.
... accessibility concerns ensure that elements set with a width aren't truncated and don't obscure other content when the page is zoomed to increase text size.
...And 2 more matches
zoom - CSS: Cascading Style Sheets
Web › CSS › zoom
the non-standard zoom css property can be used to control the magnification level of an element.
...however, unlike css transforms, zoom affects the layout size of the element.
... /* keyword values */ zoom: normal; zoom: reset; /* <percentage> values */ zoom: 50%; zoom: 200%; /* <number> values */ zoom: 1.1; zoom: 0.7; /* global values */ zoom: inherit; zoom: initial; zoom: unset; syntax values normal render this element at its normal size.
...And 2 more matches
Getting Started - Developer guides
Web › Guide › AJAX › Getting Started
<button id="ajaxbutton" type="button">make a request</button> <script> (function() { var httprequest; document.getelementbyid("ajaxbutton").addeventlistener('click', makerequest); function makerequest() { httprequest = new xmlhttprequest(); if (!httprequest) { alert('giving up :( cannot create an xmlhttp instance'); return false; } httprequest.onreadystatechange = alertcontents; httprequest.open('get', 'test.html'); httprequest.send(); } function alertcontents() { if ...
...if you do not set header content-type: application/xml, ie will throw a javascript "object expected" error after the line where you tried to access an xml element.
... then in alertcontents(), we need to replace the line alert(httprequest.responsetext); with: var xmldoc = httprequest.responsexml; var root_node = xmldoc.getelementsbytagname('root').item(0); alert(root_node.firstchild.data); this code takes the xmldocument object given by responsexml and uses dom methods to access some of the data contained in the xml document.
...And 2 more matches
WAI ARIA Live Regions/API Support - Developer guides
Web › Guide › AJAX › WAI ARIA Live Regions API Support
retrieving author-supplied aria live region semantics from an event for any mutation event in a page, the author can get the following object attributes from the event object, if they are defined on some ancestor element (closest ancestor wins): object attribute name possible values default value if not specified meaning aria markup if required container-live "off" | "polite" | "assertive" "off" interruption policy aria-live on ancestor element container-relevant "[additions] [removals] [text]" | "all" "additions text" what types of mutations are possibl...
... aria-relevant on ancestor element container-busy "true" | "false" | "error" "false" the current changes are not yet complete.
... aria-busy on ancestor element container-atomic "true" | "false" "false" is this change inside a region that should always be presented at once.
...And 2 more matches
Web Audio playbackRate explained - Developer guides
Web › Guide › Audio and video delivery › WebAudio playbackRate explained
the playbackrate property of the <audio> and <video> elements allows us to change the speed, or rate, at which a piece of web audio or video is playing.
... playbackrate basics let's starting by looking at a brief example of playbackrate usage: var myaudio = document.createelement('audio'); myaudio.setattribute('src','audiofile.mp3'); myaudio.playbackrate = 0.5; here we create an <audio> element, and set its src to a file of our choice.
... next we set playbackrate to 0.5, which represents half normal speed (the playbackrate is a multiplier applied to the original rate.) a complete example let's create a <video> element first, and set up video and playback rate controls in html: <video id="myvideo" controls> <source src="https://udn.realityripple.com/samples/6f/08625b424a.m4v" type='video/mp4' /> <source src="https://udn.realityripple.com/samples/5b/8cd6da9c65.webm" type='video/webm' /> </video> <form> <input id="pbr" type="range" value="1" min="0.5" max="4" step="0.1" > <p>playback rate <span id="currentpbr">1</span></p> </form> and apply some javascript to it: window.onload = function () { var v = document.getelementbyid("myvideo"); var p = document.getelementbyid("pbr"); var c = document.getelementbyid("curr...
...And 2 more matches
Overview of events and handlers - Developer guides
Web › Guide › Events › Overview of Events and Handlers
button event handler demo for example, browser <button> elements are intended to emit events named 'click' in response to a mouse click or, when displayed in touch sensitive surfaces, to a finger tap.
..."eventprototype" : "objectprototype"; alert("we got a click event at " + ev.timestamp + " with an argument object derived from: " + objkind ); }; and second register our function with the the button object, either on the scripting side using the dom (document object model) representation of the html page: var buttondomelement = document.queryselector('#buttonone'); buttondomelement.addeventlistener('click', example_click_handler); or within the html page by adding the function as the value of the 'onclick' attribute, although this second approach is usually only used in very simple web pages.
... this code relies on the agreement that there is a kind of event called 'click' which will call any listener (or 'handler') function with an event object argument (actually, in this case a derivative mouseevent object) and which will be fired by html button elements after user interaction.
...And 2 more matches
Parsing and serializing XML - Developer guides
Web › Guide › Parsing and serializing XML
parsing strings into dom trees this example converts an xml fragment in a string into a dom tree using a domparser: var smystring = '<a id="a"><b id="b">hey!</b></a>'; var oparser = new domparser(); var odom = oparser.parsefromstring(smystring, "application/xml"); // print the name of the root element or error message console.log(odom.documentelement.nodename == "parsererror" ?
... "error while parsing" : odom.documentelement.nodename); parsing url-addressable resources into dom trees using xmlhttprequest here is sample code that reads and parses a url-addressable xml file into a dom tree: var xhr = new xmlhttprequest(); xhr.onload = function() { dump(xhr.responsexml.documentelement.nodename); } xhr.onerror = function() { dump("error while getting xml."); } xhr.open("get", "example.xml"); xhr.responsetype = "document"; xhr.send(); the value returned in the xhr object's responsexml field is a document constructed by parsing the xml.
... to serialize the dom tree doc into xml text, call xmlserializer.serializetostring(): var oserializer = new xmlserializer(); var sxml = oserializer.serializetostring(doc); serializing html documents if the dom you have is an html document, you can serialize using serializetostring(), but there is a simpler option: just use the element.innerhtml property (if you want just the descendants of the specified node) or the element.outerhtml property if you want the node and all its descendants.
...And 2 more matches
HTML attribute: max - HTML: Hypertext Markup Language
Web › HTML › Attributes › max
if the value of the element is greater than this, the element fails constraint validation.
... valid for the numeric input types, including the date, month, week, time, datetime-local, number and range types, and both the <progress> and <meter> elements, the max attribute is a number that specifies the most positive value a form control to be considered valid.
... for the<progress> element, the max attribute describes how much work the task indicated by the progress element requires.
...And 2 more matches
HTML attribute: readonly - HTML: Hypertext Markup Language
Web › HTML › Attributes › readonly
the boolean readonly attribute, when present, makes the element not mutable, meaning the user can not edit the control.
... if the readonly attribute is specified on an input element, because the user can not edit the input, the element does not participate in constraint validation.
... the readonly attribute is supported by text, search, url, tel, email, password, date, month, week, time, datetime-local, and number<input> types and the <textarea> form control elements.
...And 2 more matches
<data> - HTML: Hypertext Markup Language
Web › HTML › Element › data
the html <data> element links a given piece of content with a machine-readable translation.
... if the content is time- or date-related, the <time> element must be used.
... permitted parents any element that accepts phrasing content.
...And 2 more matches
<frame> - HTML: Hypertext Markup Language
Web › HTML › Element › frame
<frame> is an html element which defines a particular area in which another html document can be displayed.
... using the <frame> element is not encouraged because of certain disadvantages such as performance problems and lack of accessibility for users with screen readers.
... instead of the <frame> element, <iframe> may be preferred.
...And 2 more matches
<isindex> - HTML: Hypertext Markup Language
Web › HTML › Element › isindex
summary <isindex> was an obsolete html element that put a text field in a page for querying the document.
... attributes like all other html elements, this element accepted the global attributes.
...the user fills in the fields, clicks ok, and the query results come up in the table of contents window." a thread about isindex in november 1992, kevin hoadley questioned the need for an isindex element and proposed to drop it.
...And 2 more matches
<map> - HTML: Hypertext Markup Language
Web › HTML › Element › map
the html <map> element is used with <area> elements to define an image map (a clickable link area).
... permitted content any transparent element.
... permitted parents any element that accepts phrasing content.
...And 2 more matches
<noscript> - HTML: Hypertext Markup Language
Web › HTML › Element › noscript
the html <noscript> element defines a section of html to be inserted if a script type on the page is unsupported or if scripting is currently turned off in the browser.
... permitted content when scripting is disabled and when it is a descendant of the <head> element: in any order, zero or more <link> elements, zero or more <style> elements, and zero or more <meta> elements.
... when scripting is disabled and when it isn't a descendant of the <head> element: any transparent content, but no <noscript> element must be among its descendants.
...And 2 more matches
<slot> - HTML: Hypertext Markup Language
Web › HTML › Element › slot
the html <slot> element—part of the web components technology suite—is a placeholder inside a web component that you can fill with your own markup, which lets you create separate dom trees and present them together.
... permitted parents any element that accepts phrasing content implicit aria role no corresponding role permitted aria roles no role permitted dom interface htmlslotelement attributes this element includes the global attributes.
... a named slot is a <slot> element with a name attribute.
...And 2 more matches
class - HTML: Hypertext Markup Language
Web › HTML › Global attributes › class
the class global attribute is a space-separated list of the case-sensitive classes of the element.
... classes allow css and javascript to select and access specific elements via the class selectors or functions like the dom method document.getelementsbyclassname.
... though the specification doesn't put requirements on the name of classes, web developers are encouraged to use names that describe the semantic purpose of the element, rather than the presentation of the element.
...And 2 more matches
data-* - HTML: Hypertext Markup Language
Web › HTML › Global attributes › data-*
all such custom data are available via the htmlelement interface of the element the attribute is set on.
... the htmlelement.dataset property gives access to them.
... note that the htmlelement.dataset property is a domstringmap, and the name of the custom data attribute data-test-value will be accessible via htmlelement.dataset.testvalue (or by htmlelement.dataset["testvalue"]) as any dash (u+002d) is replaced by the capitalization of the next letter, converting the name to camelcase.
...And 2 more matches
itemscope - HTML: Hypertext Markup Language
Web › HTML › Global attributes › itemscope
specifying the itemscope attribute for an element creates a new item, which results in a number of name-value pairs that are associated with the element.
... every html element may have an itemscope attribute specified.
... an itemscope element that does not have an associated itemtype must have an associated itemref.
...And 2 more matches
spellcheck - HTML: Hypertext Markup Language
Web › HTML › Global attributes › spellcheck
the spellcheck global attribute is an enumerated attribute defines whether the element may be checked for spelling errors.
... it may have the following values: true, which indicates that the element should be, if possible, checked for spelling errors; false, which indicates that the element should not be checked for spelling errors.
... if this attribute is not set, its default value is element-type and browser-defined.
...And 2 more matches
title - HTML: Hypertext Markup Language
Web › HTML › Global attributes › title
the title global attribute contains text representing advisory information related to the element it belongs to.
... some typical uses: labeling <iframe> elements for assistive technology providing a programmatically associated label for an <input> element as a fallback for a real <label> labeling controls in data tables additional semantics are attached to the title attributes of the <link>, <abbr>, <input>, and <menuitem> elements.
...some caution must be taken, as this means the following renders across two lines: html <p>newlines in <code>title</code> should be taken into account, like <abbr title="this is a multiline title">example</abbr>.</p> result title attribute inheritance if an element has no title attribute, then it inherits it from its parent node, which in turn may inherit it from its parent, and so on.
...And 2 more matches
Microdata - HTML: Hypertext Markup Language
Web › HTML › Microdata
microdata is an attempt to provide a simpler way of annotating html elements with machine-readable tags than the similar approaches of using rdfa and classic microformats.
...items and properties are represented by regular elements.
...every html element may have an itemprop attribute specified, where an itemprop consists of a name and value pair.
...And 2 more matches
CSP: base-uri - HTTP
Web › HTTP › Headers › Content-Security-Policy › base-uri
the http content-security-policy base-uri directive restricts the urls which can be used in a document's <base> element.
...if this directive is absent, the user agent will use the value in the <base> element.
...if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method than using the unsafe-inline expression.
...And 2 more matches
CSP: script-src - HTTP
Web › HTTP › Headers › Content-Security-Policy › script-src
this includes not only urls loaded directly into <script> elements, but also things like inline script event handlers (onclick) and xslt stylesheets which can trigger script execution.
...if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method than using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
...And 2 more matches
Feature-Policy - HTTP
Web › HTTP › Headers › Feature-Policy
the http feature-policy header provides a mechanism to allow and deny the use of browser features in its own frame, and in content within any <iframe> elements in the document.
... autoplay controls whether the current document is allowed to autoplay media requested through the htmlmediaelement interface.
... when this policy is disabled and there were no user gestures, the promise returned by htmlmediaelement.play() will reject with a domexception.
...And 2 more matches
JavaScript modules - JavaScript
Web › JavaScript › Guide › Modules
these examples demonstrate a simple set of modules that create a <canvas> element on a webpage, and then draw (and report information about) different shapes on the canvas.
... the modules directory's two modules are described below: canvas.js — contains functions related to setting up the canvas: create() — creates a canvas with a specified width and height inside a wrapper <div> with a specified id, which is itself appended inside a specified parent element.
... createreportlist() — creates an unordered list appended inside a specified wrapper element, which can be used to output report data into.
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Text formatting - JavaScript
Web › JavaScript › Guide › Text formatting
it is a set of "elements" of 16-bit unsigned integer values (utf-16 code units).
... each element in the string occupies a position in the string.
... the first element is at index 0, the next at index 1, and so on.
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Array.prototype.reduceRight() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › ReduceRight
(see below.) currentvalue the current element being processed in the array.
... indexoptional the index of the current element being processed in the array.
...if no initial value is supplied, the last element in the array will be used and skipped.
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Array.prototype.push() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › push
the push() method adds one or more elements to the end of an array and returns the new length of the array.
... syntax arr.push([element1[, ...[, elementn]]]) parameters elementn the element(s) to add to the end of the array.
... examples adding elements to an array the following code creates the sports array containing two elements, then appends two elements to it.
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String.prototype.split() - JavaScript
Web › JavaScript › Reference › Global Objects › String › split
if separator is omitted or does not occur in str, the returned array contains one element consisting of the entire string.
...after splitting the string, the function logs messages indicating the original string (before the split), the separator used, the number of elements in the array, and the individual array elements.
... function splitstring(stringtosplit, separator) { const arrayofstrings = stringtosplit.split(separator) console.log('the original string is: ', stringtosplit) console.log('the separator is: ', separator) console.log('the array has ', arrayofstrings.length, ' elements: ', arrayofstrings.join(' / ')) } const tempeststring = 'oh brave new world that has such people in it.' const monthstring = 'jan,feb,mar,apr,may,jun,jul,aug,sep,oct,nov,dec' const space = ' ' const comma = ',' splitstring(tempeststring, space) splitstring(tempeststring) splitstring(monthstring, comma) this example produces the following output: the original string is: "oh brave new world that has such people in it." the separator is: " " the array has 10 elements: oh / brave / new / world / that / has / such / people...
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TypedArray.from() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › from
mapfn optional map function to call on every element of the typed array.
... description typedarray.from() lets you create typed arrays from: array-like objects (objects with a length property and indexed elements); or iterable objects (objects where you can get its elements, such as map and set).
... typedarray.from() has the optional parameter mapfn, which allows you to execute a map() function on each element of the typed array (or subclass object) that is being created.
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delete operator - JavaScript
Web › JavaScript › Reference › Operators › delete
console.log(foo.bar); // undefined deleting array elements when you delete an array element, the array length is not affected.
... this holds even if you delete the last element of the array.
... when the delete operator removes an array element, that element is no longer in the array.
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Authoring MathML - MathML
Web › MathML › Authoring
t insert one line in your document header: <script src="https://fred-wang.github.io/mathml.css/mspace.js"></script> if you need more complex constructions, you might instead consider using the heavier mathjax library as a mathml polyfill: <script src="https://fred-wang.github.io/mathjax.js/mpadded-min.js"></script> note that these two scripts perform feature detection of the mspace or mpadded elements (see the browser compatibility table on these pages).
...for example the following function verifies the mathml support by testing the mspace element (you may replace mspace with mpadded): function hasmathmlsupport() { var div = document.createelement("div"), box; div.innerhtml = "<math><mspace height='23px' width='77px'/></math>"; document.body.appendchild(div); box = div.firstchild.firstchild.getboundingclientrect(); document.body.removechild(div); return math.abs(box.height - 23) <= 1 && math.abs(box.width - 77) <= 1; } alte...
... texzilla has an <x-tex> custom element, that can be used to write things like <x-tex>\frac{x^2}{a^2} + \frac{y^2}{b^2} = 1</x-tex> and get it automatically converted into mathml.
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<maction> - MathML
Web › MathML › Element › maction
the mathml <maction> element provides a possibility to bind actions to (sub-) expressions.
...to specify which child elements are addressed by the action, you can make use of the selection attribute.
... attributes actiontype the action which specifies what happens for this element.
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CSS and JavaScript animation performance - Web Performance
Web › Performance › CSS JavaScript animation performance
even if an element is in the middle of a transition, the new transition starts from the current style immediately instead of jumping to the end css state.
...developers can create an animation by simply changing an element's style each time the loop is called (or updating the canvas draw, or whatever.) note: like css transitions and animations, requestanimationframe() pauses when the current tab is pushed into the background.
...this can occur because css transitions/animations are simply resampling element styles in the main ui thread before each repaint event happens, which is almost the same as resampling element styles via a requestanimationframe() callback, also triggered before the next repaint.
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SVG Conditional Processing Attributes - SVG: Scalable Vector Graphics
Web › SVG › Attribute › Conditional Processing
the svg conditional processing attributes are all the attributes that can be specified on some svg elements to control whether or not the element on which it appears should be rendered.
... externalresourcesrequired requiredextensions requiredfeatures systemlanguage attributes externalresourcesrequired deprecated since svg 2 if set to true, it indicates that the browser must wait for all the external resources necessary to render that element to be loaded before processing the associated element.
... value: false|true; animatable: no requiredextensions list all the browser specific capabilities that must be supported by the borwser to be allowed to render the associated element.
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clip-path - SVG: Scalable Vector Graphics
Web › SVG › Attribute › clip-path
the clip-path presentation attribute defines or associates a clipping path with the element it is related to.
... as a presentation attribute, it can be applied to any element but it has noticeable effects mostly on the following nineteen elements: <a>, <circle>, <clippath>, <ellipse>, <g>, <glyph>, <image>, <line>, <marker>, <mask>, <path>, <pattern>, <polygon>, <polyline>, <rect>, <svg>, <symbol>, <text>, <use> html,body,svg { height:100% } <svg viewbox="0 0 20 20" xmlns="http://www.w3.org/2000/svg"> <clippath id="myclip" clippathunits="objectboundingbox"> <circle cx=".5" cy=".5" r=".5" /> </clippath> <!-- top-left: apply a custom defined clipping path --> <rect x="1" y="1" width="8" height="8" stroke="green" clip-path="url(#myclip)" /> <!-- top-right: apply a css basic shape on a fill-box geom...
... path with a clippathunits set to userspaceonuse --> <rect x="11" y="11" width="8" height="8" stroke="green" clip-path="circle() view-box" /> </svg> usage notes value <url> | [ <basic-shape> || <geometry-box> ] | none default value none animatable yes <geometry-box> an extra information to tell how a <basic-shape> is applied to an element: fill-box indicates to use the object bounding box; stroke-box indicates to use the object bounding box extended with the stroke; view-box indicates to use the nearest svg viewport as the reference box.
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clip-rule - SVG: Scalable Vector Graphics
Web › SVG › Attribute › clip-rule
« svg attribute reference home the clip-rule attribute only applies to graphics elements that are contained within a <clippath> element.
... the following fragment of code will cause an evenodd clipping rule to be applied to the clipping path because clip-rule is specified on the <path> element that defines the clipping shape: <g> <clippath id="myclip"> <path d="..." clip-rule="evenodd" /> </clippath> <rect clip-path="url(#myclip)" ...
... /> </g> whereas the following fragment of code will not cause an evenodd clipping rule to be applied because the clip-rule is specified on the referencing element, not on the object defining the clipping shape: <g> <clippath id="myclip"> <path d="..." /> </clippath> <rect clip-path="url(#myclip)" clip-rule="evenodd" ...
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clip - SVG: Scalable Vector Graphics
Web › SVG › Attribute › clip
the clip attribute is a presentation attribute defining the visible region of an element.
...the value of auto defines a clipping path along the bounds of the viewport created by the given element.
... as a presentation attribute, it can be applied to any element but it has effect only on the following six elements: <svg>, <symbol>, <image>, <foreignobject>, <pattern>, <marker> html,body,svg { height:100% } <svg viewbox="0 0 20 10" xmlns="http://www.w3.org/2000/svg"> <!-- auto clipping --> <svg x="0" width="10" height="10" clip="auto"> <circle cx="5" cy="5" r="4" stroke="green" /> </svg> <!-- rect(top, right, bottom, left) clipping --> <svg x="10" width="10" height="10" clip="rect(1, 9, 8, 2)"> <circle cx="5" cy="5" r="4" stroke="green" /> </svg> </svg> usage notes warning: this property is deprecated.
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clipPathUnits - SVG: Scalable Vector Graphics
Web › SVG › Attribute › clipPathUnits
the clippathunits attribute indicates which coordinate system to use for the contents of the <clippath> element.
... only one element is using this attribute: <clippath> html,body,svg { height:100% } <svg viewbox="0 0 100 100"> <clippath id="myclip1" clippathunits="userspaceonuse"> <circle cx="50" cy="50" r="35" /> </clippath> <clippath id="myclip2" clippathunits="objectboundingbox"> <circle cx=".5" cy=".5" r=".35" /> </clippath> <!-- some reference rect to materialized to clip path --> <rect id="r1" x="0" y="0" width="45" height="45" /> <rect id="r2" x="0" y="55" width="45" height="45" /> <rect id="r3" x="55" y="55" width="45" height="45" /> <rect id="r4" x="55" y="0" width="45" height="45" /> <!-- the first 3 rect are clipped with usespaceonuse units --> <use clip-path="url(#myclip1)" xlink:href="#r1" fill="red" /> <use clip-path="url(#myclip1)" xlink:href="#r2" f...
...ill="red" /> <use clip-path="url(#myclip1)" xlink:href="#r3" fill="red" /> <!-- the last rect is clipped with objectboundingbox units --> <use clip-path="url(#myclip2)" xlink:href="#r4" fill="red" /> </svg> clippath for <clippath>, clippathunits define the coordinate system in use for the content of the element.
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height - SVG: Scalable Vector Graphics
Web › SVG › Attribute › height
the height attribute defines the vertical length of an element in the user coordinate system.
... twenty five elements are using this attribute: <feblend>, <fecolormatrix>, <fecomponenttransfer>, <fecomposite>, <feconvolvematrix>, <fediffuselighting>, <fedisplacementmap>, <fedropshadow>, <feflood>, <fegaussianblur>, <feimage>, <femerge>, <femorphology>, <feoffset>, <fespecularlighting>, <fetile>, <feturbulence>, <filter>, <foreignobject>, <image>, <mask>, <pattern>, <rect>, <svg>, and <use> html,body,svg { height:100% } <svg viewbox="0 0 300 100" xmlns="http://www.w3.org/2000/svg"> <!-- with a height of 0 or less, nothing will be rendered --> <rect y="0" x="0" width="90" height="0"/> <rect y="0" x="100" width="90" height="60"/> <rect y="0" x="200" width="90" height="100%"/> </svg> feblend for <feblend>, height defines the vertical length for the rendering area of the primi...
... note: in an html document if both the viewbox and height attributes are omitted, the svg element will be rendered with a height of 150px value auto | <length> | <percentage> default value auto (treated as 100%) animatable yes note: starting with svg2, height is a geometry property meaning this attribute can also be used as a css property for <svg>.
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maskContentUnits - SVG: Scalable Vector Graphics
Web › SVG › Attribute › maskContentUnits
the maskcontentunits attribute indicates which coordinate system to use for the contents of the <mask> element.
... only one element is using this attribute: <mask> html,body,svg { height:100% } <svg viewbox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"> <mask id="mymask1" maskcontentunits="userspaceonuse"> <rect fill="black" x="0" y="0" width="100%" height="100%" /> <circle fill="white" cx="50" cy="50" r="35" /> </mask> <mask id="mymask2" maskcontentunits="objectboundingbox"> <rect fill="black" x="0" y="0" width="100%" height="100%" /> <circle fill="white" cx=".5" cy=".5" r=".35" /> </mask> <!-- some reference rect to materialized the mask --> <rect id="r1" x="0" y="0" width="45" height="45" /> <rect id="r2" x="0" y="55" width="45" height="45" /> <rect id="r3" x="55" y="55" width="45" height="45" /> <rect id="r4" x="55" y="0" width="45" height="45" /> <...
...mask="url(#mymask1)" xlink:href="#r1" fill="red" /> <use mask="url(#mymask1)" xlink:href="#r2" fill="red" /> <use mask="url(#mymask1)" xlink:href="#r3" fill="red" /> <!-- the last rect is masked with objectboundingbox units --> <use mask="url(#mymask2)" xlink:href="#r4" fill="red" /> </svg> mask for <mask>, maskcontentunits defines the coordinate system in use for the content of the element.
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overflow - SVG: Scalable Vector Graphics
Web › SVG › Attribute › overflow
the overflow attribute sets what to do when an element's content is too big to fit in its block formatting context.
... when scroll is specified on an <svg> element, a scrollbar or panner is normally shown for the svg viewport whether or not any of its content is clipped.
... within svg content, the value auto implies that all rendered content for child elements must be visible, either through a scrolling mechanism, or by rendering with no clip.
...And 2 more matches
vector-effect - SVG: Scalable Vector Graphics
Web › SVG › Attribute › vector-effect
as a presentation attribute, it can be applied to any element but it has effect only on the following ten elements: <circle>, <ellipse>, <foreignobject>, <image>, <line>, <path>, <polygon>, <polyline>, <rect>, <text>, <textpath> <tspan>, and <use> usage notes value none | non-scaling-stroke | non-scaling-size | non-rotation | fixed-position default value none animatable yes none this value specifies that no vector effect shall be applied, i.e.
...the resulting visual effect of this value is that the stroke width is not dependant on the transformations of the element (including non-uniform scaling and shear transformations) and zoom level.
... non-scaling-size this value specifies a special user coordinate system used by the element and its descendants.
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width - SVG: Scalable Vector Graphics
Web › SVG › Attribute › width
the width attribute defines the horizontal length of an element in the user coordinate system.
... twenty five elements are using this attribute: <feblend>, <fecolormatrix>, <fecomponenttransfer>, <fecomposite>, <feconvolvematrix>, <fediffuselighting>, <fedisplacementmap>, <fedropshadow>, <feflood>, <fegaussianblur>, <feimage>, <femerge>, <femorphology>, <feoffset>, <fespecularlighting>, <fetile>, <feturbulence>, <filter>, <foreignobject>, <image>, <mask>, <pattern>, <rect>, <svg>, and <use> html,body,svg { height:100% } <svg viewbox="0 0 100 300" xmlns="http://www.w3.org/2000/svg"> <!-- with a width of 0 or less, nothing will be rendered --> <rect x="0" y="0" width="0" height="90"/> <rect x="0" y="100" width="60" height="90"/> <rect x="0" y="200" width="100%" height="90"/> </svg> feblend for <feblend>, width defines the horizontal length for the rendering area of the primi...
... note: in an html document if both the viewbox and width attributes are omitted, the svg element will be rendered with a width of 300px value auto | <length> | <percentage> default value auto (treated as 100%) animatable yes note: starting with svg2, width is a geometry property meaning this attribute can also be used as a css property for <svg>.
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x - SVG: Scalable Vector Graphics
Web › SVG › Attribute › x
thirty seven elements are using this attribute: <altglyph>, <feblend>, <fecolormatrix>, <fecomponenttransfer>, <fecomposite>, <feconvolvematrix>, <fediffuselighting>, <fedisplacementmap>, <fedropshadow>, <feflood>, <fefunca>, <fefuncb>, <fefuncg>, <fefuncr>, <fegaussianblur>, <feimage>, <femerge>, <femergenode>, <femorphology>, <feoffset>, <fepointlight>, <fespecularlighting>, <fespotlight>, <fetile>, <feturbulence>, <filter>, <foreignobject>, <glyphref>, <image>, <mask>, <pattern>, <rect>, <svg>, <text>, <tref>, <tspan>, and <use> html,body,svg { height:100% } <svg viewbox="0 0 300 100" xmlns="http://www.w3.org/2000/svg"> <rect x="20" y="20" width="60" height="60" /> <rect x="120" y="20" width="60" height="60"...
... value <length> | <percentage> default value 0% animatable yes fepointlight for <fepointlight>, x defines the x location for the light source in the coordinate system defined by the primitiveunits attribute on the <filter> element.
... value <length> | <percentage> default value 0% animatable yes fespotlight for <fespotlight>, x defines the x location for the light source in the coordinate system defined by the primitiveunits attribute on the <filter> element.
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xml:lang - SVG: Scalable Vector Graphics
Web › SVG › Attribute › xml:lang
the xml:lang attribute specifies the primary language used in contents and attributes containing text content of particular elements.
... it is a universal attribute allowed in all xml dialects to mark up the natural human language that an element contains.
... all elements are using this attribute.
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y - SVG: Scalable Vector Graphics
Web › SVG › Attribute › y
thirty seven elements are using this attribute: <altglyph>, <feblend>, <fecolormatrix>, <fecomponenttransfer>, <fecomposite>, <feconvolvematrix>, <fediffuselighting>, <fedisplacementmap>, <fedropshadow>, <feflood>, <fefunca>, <fefuncb>, <fefuncg>, <fefuncr>, <fegaussianblur>, <feimage>, <femerge>, <femergenode>, <femorphology>, <feoffset>, <fepointlight>, <fespecularlighting>, <fespotlight>, <fetile>, <feturbulence>, <filter>, <foreignobject>, <glyphref>, <image>, <mask>, <pattern>, <rect>, <svg>, <text>, <tref>, <tspan>, and <use> html,body,svg { height:100% } <svg viewbox="0 0 100 300" xmlns="http://www.w3.org/2000/svg"> <rect y="20" x="20" width="60" height="60" /> <rect y="120" x="20" width="60" height="60"...
... value <length> | <percentage> default value 0% animatable yes fepointlight for <fepointlight>, y defines the y location for the light source in the coordinate system defined by the primitiveunits attribute on the <filter> element.
... value <length> | <percentage> default value 0% animatable yes fespotlight for <fespotlight>, y defines the y location for the light source in the coordinate system defined by the primitiveunits attribute on the <filter> element.
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<animateColor> - SVG: Scalable Vector Graphics
Web › SVG › Element › animateColor
this element has been deprecated in svg 1.1 second edition and may be removed in a future version of svg.
... it provides no features not already available by using the <animate> element.
... so, authors should use the <animate> element instead.
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<feDiffuseLighting> - SVG: Scalable Vector Graphics
Web › SVG › Element › feDiffuseLighting
usage context categoriesfilter primitive elementpermitted contentany number of descriptive elements and exactly one light source element, in any order.
... attributes global attributes core attributes presentation attributes filter primitive attributes class style specific attributes in surfacescale diffuseconstant kernelunitlength dom interface this element implements the svgfediffuselightingelement interface.
... example the following example show the effect of the <fediffuselighting> element on a circle with each light source available.
...And 2 more matches
<g> - SVG: Scalable Vector Graphics
Web › SVG › Element › g
the <g> svg element is a container used to group other svg elements.
... transformations applied to the <g> element are performed on its child elements, and its attributes are inherited by its children.
... it can also group multiple elements to be referenced later with the <use> element.
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<image> - SVG: Scalable Vector Graphics
Web › SVG › Element › image
the <image> svg element includes images inside svg documents.
...to include dynamic svg elements, try <use> with an external url.
...this specific element and its behavior only apply inside svg documents or inline svg.
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<radialGradient> - SVG: Scalable Vector Graphics
Web › SVG › Element › radialGradient
the <radialgradient> element lets authors define radial gradients that can be applied to fill or stroke of graphical elements.
... don't be confused with css radial-gradient() as css gradients can only apply to html elements where svg gradient can only apply to svg elements.
... value type: <transform-list> ; default value: identity transform; animatable: yes href this attribute defines a reference to another <lineargradient> element that will be used as a template.
...And 2 more matches
<switch> - SVG: Scalable Vector Graphics
Web › SVG › Element › switch
the <switch> svg element evaluates any requiredfeatures, requiredextensions and systemlanguage attributes on its direct child elements in order, and then renders the first child where these attributes evaluate to true.
...if a child element is a container element, like <g>, then its subtree is also processed/rendered or bypassed/not rendered.
... the display and visibility properties have no effect on <switch> element processing.
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Getting started - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Getting Started
(firefox users: click here) the rendering process involves the following: we start with the <svg> root element: a doctype declaration as known from (x)html should be left off because dtd based svg validation leads to more problems than it solves before svg 2, to identify the version of the svg for other types of validation the version and baseprofile attributes should always be used instead.
... basic properties of svg files the first important thing to notice is the order of rendering elements.
... the globally valid rule for svg files is, that later elements are rendered atop previous elements.
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Gradients in SVG - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Gradients
you must give the gradient an id attribute; otherwise it can't be referenced by other elements inside the file.
...-color: red; } .stop2 { stop-color: black; stop-opacity: 0; } .stop3 { stop-color: blue; } ]]></style> </defs> <rect id="rect1" x="10" y="10" rx="15" ry="15" width="100" height="100"/> <rect x="10" y="120" rx="15" ry="15" width="100" height="100" fill="url(#gradient2)"/> </svg> screenshotlive sample above is an example of a linear gradient being applied to a <rect> element.
...this is done the same way you reference elements in css, using a url.
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Positions - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Positions
the grid for all elements, svg uses a coordinate system or grid system similar to the one used by canvas (and by a whole lot of other computer drawing routines).
...however, this is the same way elements in html are positioned (by default, ltr documents are considered not the rtl documents which position x from right-to-left).
... example: the element <rect x="0" y="0" width="100" height="100" /> defines a rectangle from the upper left corner, that spans from there 100px to the right and to the bottom.
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xml:base - XML: Extensible Markup Language
Web › XML › xml:base
xml:base is like the html <base> element, but can specify the base uri per element as well as the entire document.
... the base url of a element can be queried from a script using node.baseuri.
... the base uri of an element is: the base uri specified by an xml:base attribute on the element, if one exists, otherwise the base uri of the element's parent element within the document entity or external entity, if one exists, otherwise the base uri of the document entity or external entity containing the element.
...And 2 more matches
Index - XPath
Web › XPath › Index
only elements have attributes.
...since only the root node or element nodes have children, any other use will select nothing.
...attribute and namespace nodes are not included - the parent of an attribute node is an element node, but attribute nodes are not the children of their parents.
...And 2 more matches
XPath snippets - XPath
Web › XPath › Snippets
anode.documentelement : anode.ownerdocument.documentelement); var result = xpe.evaluate(aexpr, anode, nsresolver, 0, null); var found = []; var res; while (res = result.iteratenext()) found.push(res); return found; } this function uses the new xpathevaluator() constructor, which is supported in firefox, chrome, opera and safari, but not in edge or internet explorer.
...cripts in a web document which might be accessed by edge or internet explorer users should replace the call to new xpathevaluator() with the following fragment: // xpathevaluator is implemented on objects that implement document var xpe = anode.ownerdocument || anode; in that case the creation of the xpathnsresolver can be simplified as: var nsresolver = xpe.creatensresolver(xpe.documentelement); note however that creatensresolver should only be used if you are sure the namespace prefixes in the xpath expression match those in the document you want to query (and that no default namespace is being used (though see document.creatensresolver for a workaround)).
...if you can rely on id attributes, document.getelementbyid() is still powerful, but it's not nearly as powerful as xpath.
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<xsl:attribute> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › attribute
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:attribute> element creates an attribute in the output document, using any values that can be accessed from the stylesheet.
... the element must be defined before any other output document element inside the output document element for which it establishes attribute values.
... but it may be after or inside elements that won't be part of the output (like <xsl:choose> or <xsl:apply-templates> etc.).
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<xsl:output> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › output
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:output> element controls the characteristics of the output document.
... to function correctly in netscape, this element, with the method attribute, must be used.
... syntax <xsl:output method="xml" | "html" | "text" version=string encoding=string omit-xml-declaration="yes" | "no" standalone="yes" | "no" doctype-public=string doctype-system=string cdata-section-elements=list-of-names indent="yes" | "no" media-type=string /> required attributes none.
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<xsl:param> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › param
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:param> element establishes a parameter by name and, optionally, a default value for that parameter.
... when used as a top-level element, the parameter is global .
... when used inside an <xsl:template> element, the parameter is local to that template.
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<xsl:template> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › template
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:template> element defines an output producing template.
... this element must have either the match attribute or the name attribute set.
... optional attributes match specifies a pattern that determines the elements for which this template should be used.
...And 2 more matches
addon-page - Archive of obsolete content
Archive › Add-ons › Add-on SDK › High-Level APIs › addon-page
create a page that does not contain navigational elements.
... for pages like this, navigational elements such as the awesome bar, search bar, or bookmarks toolbar are not usually relevant and distract from the content you are presenting.
... the addon-page module provides a simple way to have a page which excludes these elements.
...after this, the page loaded from "data/index.html" will not contain navigational elements: var addontab = require("sdk/addon-page"); var data = require("sdk/self").data; require("sdk/tabs").open(data.url("index.html")); this only affects the page at "data/index.html": all other pages are displayed normally.
page-worker - Archive of obsolete content
Archive › Add-ons › Add-on SDK › High-Level APIs › page-worker
in this example we fetch the first paragraph of a page from wikipedia, then the first paragraph of a different page: var getfirstparagraph = "var paras = document.getelementsbytagname('p');" + "console.log(paras[0].textcontent);" + "self.port.emit('loaded');" pageworker = require("sdk/page-worker").page({ contentscript: getfirstparagraph, contenturl: "http://en.wikipedia.org/wiki/chalk" }); pageworker.port.on("loaded", function() { pageworker.contenturl = "http://en.wikipedia.org/wiki/cheese" }); scripting page...
... for example, this add-on loads a page from wikipedia, and runs a content script in it to send all the headers back to the main add-on code: var pageworkers = require("sdk/page-worker"); // this content script sends header titles from the page to the add-on: var script = "var elements = document.queryselectorall('h2 > span'); " + "for (var i = 0; i < elements.length; i++) { " + " postmessage(elements[i].textcontent) " + "}"; // create a page worker that loads wikipedia: pageworkers.page({ contenturl: "http://en.wikipedia.org/wiki/internet", contentscript: script, contentscriptwhen: "ready", onmessage: function(message) { co...
...this may take one of the following values: "start": load content scripts immediately after the document element for the page is inserted into the dom, but before the dom content itself has been loaded "ready": load content scripts once dom content has been loaded, corresponding to the domcontentloaded event "end": load content scripts once all the content (dom, js, css, images) for the page has been loaded, at the time the window.onload event fires this property is optional and defaults...
...this may have one of the following values: "start": load content scripts immediately after the document element for the page is inserted into the dom, but before the dom content itself has been loaded "ready": load content scripts once dom content has been loaded, corresponding to the domcontentloaded event "end": load content scripts once all the content (dom, js, css, images) for the page has been loaded, at the time the window.onload event fires contentscriptoptions read-only value exposed to conte...
core/namespace - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › core namespace
let { ns } = require('sdk/core/namespace'); let anamespace = ns(); anamespace(publicapi).secret = secret; one namespace may be used with multiple objects: let { ns } = require('sdk/core/namespace'); let dom = ns(); function view(element) { let view = object.create(view.prototype); dom(view).element = element; // ....
... } view.prototype.destroy = function destroy() { let { element } = dom(this); element.parentnode.removechild(element); // ...
... let sandboxes = ns(); function widget(options) { let { element, contentscript } = options; let widget = object.create(widget.prototype); view.call(widget, options.element); sandboxes(widget).sandbox = cu.sandbox(element.ownerdocument.defaultview); // ...
... let { dom } = require('./view'); widget.prototype.setinnerhtml = function setinnerhtml(html) { dom(this).element.innerhtml = string(html); }; ...
window/utils - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › window utils
: var { ci } = require('chrome'); var utils = require('sdk/window/utils'); var browserwindow = utils.getmostrecentbrowserwindow(); var window = browserwindow.content; // `window` object for the current webpage utils.gettoplevelwindow(window) == browserwindow // => true parameters window : nsidomwindow returns nsidomwindow getwindowdocshell(window) returns the nsidocshell for the tabbrowser element.
... returns nsidomwindow getfocusedelement() get the element that is currently focused.
... this will always be an element within the document loaded in the focused window, or null if no element in that document is focused.
... returns nsidomelement getframes(window) get the frames contained by the given window.
JavaScript Daemons Management - Archive of obsolete content
Archive › Add-ons › Code snippets › Timers › Daemons
lem.style.top = math.sin(oletter.pos) * ndist + "px"; oletter.elem.style.left = math.cos(oletter.pos) * ndist * 5 + "px"; } } function prepare () { // build letters list // http://tyleregeto.com/text-animation-in-javascript this.textcontent = ""; aletters.length = 0; for (var ospan, oletter, nletter = 0, nlen = stext.length; nletter < nlen; nletter++) { ospan = document.createelement("span"); ospan.textcontent = stext[nletter]; oletter = { "elem": ospan, "parent": this }; aletters.push(oletter); oletter.pos = math.random() * 50; oletter.elem.style.position = "relative"; this.appendchild(ospan); } } var nmaxdist = 25, aletters = [], stext = "do you feel lucky, punk?", orecompose = new daemon(document.createelement("p"), perform, 33, 30, prepare);...
... "perform": function () { [custom code] }, // required |*| }, 200, 30); |*| \*/ var stext = "do you feel lucky, punk?", ounhide = daemon.buildaround({ // http://tyleregeto.com/text-animation-in-javascript "letters": [], "numletters": 0, "clock": 0, "interval": 0.0, "delta": 33, "letters": [], "pool": ["0","1","2","3","4","5","6","7","8","9"], "target": document.createelement("p"), "create": function () { // build letters list this.target.textcontent = ""; this.letters.length = 0; for (var ospan, oletter, nletter = 0, nlen = stext.length; nletter < nlen; nletter++) { ospan = document.createelement("span"); ospan.textcontent = stext[nletter]; oletter = { "elem": ospan, "parent": this.target }; this.letters.push(oletter); ...
...lem.style.top = math.sin(oletter.pos) * ndist + "px"; oletter.elem.style.left = math.cos(oletter.pos) * ndist * 5 + "px"; } } function prepare () { // build letters list // http://tyleregeto.com/text-animation-in-javascript this.textcontent = ""; aletters.length = 0; for (var ospan, oletter, nletter = 0, nlen = stext.length; nletter < nlen; nletter++) { ospan = document.createelement("span"); ospan.textcontent = stext[nletter]; oletter = { "elem": ospan, "parent": this }; aletters.push(oletter); oletter.pos = math.random() * 50; oletter.elem.style.position = "relative"; this.appendchild(ospan); } } var nmaxdist = 25, aletters = [], stext = "do you feel lucky, punk?", orecompose = new daemon.safe(document.createelement("p"), perform, 33, 30, prep...
...erform": function () { [custom code] }, // required |*| }, 200, 30); |*| \*/ var stext = "do you feel lucky, punk?", ounhide = daemon.safe.buildaround({ // http://tyleregeto.com/text-animation-in-javascript "letters": [], "numletters": 0, "clock": 0, "interval": 0.0, "delta": 33, "letters": [], "pool": ["0","1","2","3","4","5","6","7","8","9"], "target": document.createelement("p"), "create": function () { // build letters list this.target.textcontent = ""; this.letters.length = 0; for (var ospan, oletter, nletter = 0, nlen = stext.length; nletter < nlen; nletter++) { ospan = document.createelement("span"); ospan.textcontent = stext[nletter]; oletter = { "elem": ospan, "parent": this.target }; this.letters.push(oletter); ...
Toolbar - Archive of obsolete content
Archive › Add-ons › Code snippets › Toolbar
you must not insert your toolbar button between any of the following elements: the combined back/forward button, the location bar, the stop botton, or the reload button.
... these elements have special behaviors when placed next to eachother, and will break if separated by another element.
... * @param {string} afterid the id of the element to insert after.
... @optional */ function installbutton(toolbarid, id, afterid) { if (!document.getelementbyid(id)) { var toolbar = document.getelementbyid(toolbarid); // if no afterid is given, then append the item to the toolbar var before = null; if (afterid) { let elem = document.getelementbyid(afterid); if (elem && elem.parentnode == toolbar) before = elem.nextelementsibling; } toolbar.insertitem(id, before); toolbar.setattribute("currentset", toolbar.currentset); document.persist(toolbar.id, "currentset"); if (toolbarid == "addon-bar") toolbar.collapsed = false; } } if (firstrun) { installbutton("nav-bar", "my-extension-navbar-button"); // the "addon-bar" is availabl...
getAttributeNS - Archive of obsolete content
Archive › Add-ons › Code snippets › getAttributeNS
while namespaced attributes are less common than namespaced elements, some standards such as xlink depend on them.
... note that all gecko-based browsers (including firefox) support dom:element.getattributens.
... && attrs2[i].nodevalue === ns ) { // e.g., 'xmlns:xlink' and 'http://www.w3.org/1999/xlink' return attrs[j].nodevalue; } } thisitem = thisitem.parentnode; } } } return ''; // if not found (some implementations return 'null' but this is not standard) } alert(getattributenswrapper (someelement, 'http://www.w3.org/1999/xlink', 'href')); // gets xlink:href, xl:href, etc.
... on current element, conditionally on whether its prefix matches a declared namespace see also http://www.w3.org/tr/dom-level-3-cor...mespaceurialgo ...
Extension Etiquette - Archive of obsolete content
Archive › Add-ons › Extension etiquette
other ui elements in general, toolbar items are very useful to end users because they can be removed or added to various toolbars as necessary.
...likewise, use context menu items sparingly — only for tasks that are done frequently or on specific elements of a web page.
... ids and class names in html and xul documents, when extensions add elements to web pages or browser windows.
...class names for html elements created by the cool beans extension, for instance, might all be prefixed with cool-beans-.
Listening to events in Firefox extensions - Archive of obsolete content
Archive › Add-ons › Listening to events in Firefox extensions
types of events there are multiple types of events that application and extension authors can use to receive notifications from <xul:browser> and <xul:tabbrowser> elements to hear about changes relating to loads of the content contained within them.
... some of the more interesting dom events you may wish to monitor are listed here: event description domlinkadded dispatched when a new html <link> element is detected in the document.
...both browser and tabbrowser elements support the following: var progresslistener = { // add nsiwebprogressimplementation here } b.addprogresslistener(progresslistener); where b is the browser or tabbrowser you want to listen to events for.
... pageshoweventhandlers the pageshoweventhandlers() function is called by the pageshow event and is used to populate the character set menu and update the ui elements associated with any detected feeds or opensearch plugins for the website.
JavaScript Object Management - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › JavaScript Object Management
this allows you to manipulate and possibly change elements in the window without the user noticing the changes.
... */ init : function(aevent) { this._stringbundle = document.getelementbyid("xulschoolhello-string-bundle"); // you can make changes to the window dom here.
...if you really need to do something like this anyway, one way to do it is to have a timeout execute the code after a delay: init : function(aevent) { let that = this; this._stringbundle = document.getelementbyid("xs-hw-string-bundle"); window.settimeout( function() { window.alert(that._stringbundle.getstring("xulschoolhello.greeting.label")); }, 0); } the settimeout function executes the function in the first parameter, after a delay in miliseconds specified by the second parameter.
... a javascript code module is a regular js file that specifies which of the declared elements in it are public.
XUL user interfaces - Archive of obsolete content
Archive › Beginner tutorials › XUL user interfaces
copy and paste the content from here, making sure that you scroll to get all of it: // xul demonstration var datebox, daybox, currentday, status; // elements // called by window onload function init() { datebox = document.getelementbyid("date-text") daybox = document.getelementbyid("day-box") status = document.getelementbyid("status") settoday(); } // called by clear button function cleardate() { datebox.value = "" refresh() } // called by today button function settoday() { var d = new date() datebox.value = (d.getmonth() + 1) ...
...it is made up of other elements that are generated by its xbl binding.
... discover the class of its html:input element.
... this is the element that actually receives user input.
Case Sensitivity in class and id Names - Archive of obsolete content
Archive › Case Sensitivity in class and id Names
in the authoring of both css and javascript/dom (otherwise known as dhtml) routines, it is a near-certainty that class and id names will be used to identify elements.
...in section 7.5.2, which defines class and ids, we find the following text: id = name [cs] this attribute assigns a name to an element.
...class = cdata-list [cs] this attribute assigns a class name or set of class names to an element.
... any number of elements may be assigned the same class name or names.
Creating a dynamic status bar extension - Archive of obsolete content
Archive › Creating a dynamic status bar extension
function inforeceived() { var samplepanel = document.getelementbyid('stockwatcher'); var output = httprequest.responsetext; if (output.length) { // remove whitespace from the end of the string; // this gets rid of the end-of-line characters output = output.replace(/\w*$/, ''); // build the tooltip string var fieldarray = output.split(','); // assert that fieldarray[0] == 'goog' samplepanel.label = 'goog: ' + fieldarray[1]; ...
... samplepanel.tooltiptext = 'chg: ' + fieldarray[4] + ' | ' + 'open: ' + fieldarray[5] + ' | ' + 'low: ' + fieldarray[6] + ' | ' + 'high: ' + fieldarray[7] + ' | ' + 'vol: ' + fieldarray[8]; } } the first thing we do here is get the status bar panel into the variable samplepanel by calling the document.getelementbyid() dom function.
...we use the split() string function to split the comma-separated value string into its individual parts, with each field in a separate element in the array fieldarray.
...the string is built from a combination of static strings and various elements from the fieldarray array.
Using XML Data Islands in Mozilla - Archive of obsolete content
Archive › Misc top level › Using XML Data Islands in Mozilla
javascript can use the content of a <script> element as a data block if the src attribute is omitted and the type attribute does not specify an executable script type.
...ike this: <script id="purchase-order" type="application/xml"> <purchaseorder xmlns="http://example.mozilla.org/purchaseorderml"> <lineitem> <name>line item 1</name> <price>1.25</price> </lineitem> <lineitem> <name>line item 2</name> <price>2.48</price> </lineitem> </purchaseorder> </script> the xml source text can then be retrieved like this: var ordersource = document.getelementbyid("purchase-order").textcontent; the xml source text can be parsed into a dom tree using the domparser api: var parser = new domparser(); var doc = parser.parsefromstring(ordersource, "application/xml"); the html5 data block-based way shown here works in firefox, opera, webkit-based browsers such as chrome and safari, and ie9 while ie's xml data islands work only in ie.
...tle>xml data block demo</title> <script id="purchase-order" type="application/xml"> <purchaseorder xmlns="http://example.mozilla.org/purchaseorderml"> <lineitem> <name>line item 1</name> <price>1.25</price> </lineitem> <lineitem> <name>line item 2</name> <price>2.48</price> </lineitem> </purchaseorder> </script> <script> function rundemo() { var ordersource = document.getelementbyid("purchase-order").textcontent; var parser = new domparser(); var doc = parser.parsefromstring(ordersource, "application/xml"); var lineitems = doc.getelementsbytagnamens("http://example.mozilla.org/purchaseorderml", "lineitem"); var firstprice = lineitems[0].getelementsbytagnamens("http://example.mozilla.org/purchaseorderml", "price")[0].textcontent; document.body.textcontent = "the...
...for this demo, you must create an external document called purchase_order.xml: <!doctype html> <html> <head> <title>xml data block demo</title> <script> function rundemo() { var doc = document.getelementbyid("purchase-order").contentdocument; var lineitems = doc.getelementsbytagnamens("http://example.mozilla.org/purchaseorderml", "lineitem"); var firstprice = lineitems[0].getelementsbytagnamens("http://example.mozilla.org/purchaseorderml", "price")[0].textcontent; document.getelementbyid("output-box").textcontent = "the purchase order contains " + lineitems.length + " line items.
Block and Line Layout Cheat Sheet - Archive of obsolete content
Archive › Mozilla › Firefox › Block and Line Layout Cheat Sheet
ns_frame_external_reference ns_frame_replaced_element ns_frame_generated_content ns_frame_has_loaded_images ns_frame_out_of_flow ns_frame_selected_content ns_frame_is_dirty ns_frame_is_unflowable an unflowable frame is an error condition; for example, due to system limitations.
... maxelementwidth the maximum width for elements within the frame that cannot be broken down further; e.g., the longest word in a paragraph.
... brs_computemaxelementsize this flag is set if reflow should recompute an element's maximum size.
... it is set in the nsblockreflowstate constructor if the "maxelementsize" member of the nshtmlreflowmetrics object has been provided by (the parent frame?).
Monitoring downloads - Archive of obsolete content
Archive › Mozilla › Monitoring downloads
onload: function() { // initialization code this.initialized = true; this.strings = document.getelementbyid("downloadlogger-strings"); this.dlmgr = components.classes["@mozilla.org/download-manager;1"] .getservice(components.interfaces.nsidownloadmanager); this.dlmgr.addlistener(downloadlogger); // open the database, placing its file in the profile directory this.dbfile = components.classes["@mozilla.org/file/directory_service;1"] .getse...
...ofd", components.interfaces.nsifile); this.dbfile.append("downloadlogger.sqlite"); // get access to the storage service and open the database this.storageservice = components.classes["@mozilla.org/storage/service;1"] .getservice(components.interfaces.mozistorageservice); var dbconn = this.storageservice.opendatabase(this.dbfile); var loglist = document.getelementbyid("loglist"); var statement = dbconn.createstatement("select * from items"); // get all items in table try { while (statement.executestep()) { var row = document.createelement('listitem'); // add the cells to the row var cell = document.createelement('listcell'); var sourcestr = statement.getstring(0); row.setattribute("tooltiptext", sourcestr)...
...; sourcestr = sourcestr.slice(sourcestr.lastindexof("/")+1); cell.setattribute("label", sourcestr); // source row.appendchild(cell); cell = document.createelement('listcell'); cell.setattribute("label", (statement.getint64(1) / 1024).tofixed(1) + "kb"); // size cell.setattribute("style", "text-align:right"); row.appendchild(cell); var thedate = new date(statement.getint64(2) / 1000); // start time cell = document.createelement('listcell'); var datestr = thedate.tolocalestring(); cell.setattribute("label", datestr); row.appendchild(cell); thedate = new date(statement.getint64(3)); // end time cell = document.createelement('listcell'); datestr = thedate.tolocalestring()...
...; cell.setattribute("label", datestr); row.appendchild(cell); var speed = statement.getdouble(4) / 1024.0; cell = document.createelement('listcell'); cell.setattribute("label", speed.tofixed(1) + "kb/sec"); cell.setattribute("style", "text-align:right"); row.appendchild(cell); var status = statement.getint32(5); var style = "color:black"; cell = document.createelement('listcell'); var statusstr; switch(status) { case 0: statusstr = "downloading"; break; case 1: statusstr = "complete"; style = "color:green"; break; case 2: statusstr = "failed"; style = "color:red"; break; case 3: ...
Mozilla Application Framework in Detail - Archive of obsolete content
Archive › Mozilla › Mozilla Application Framework › Mozilla Application Framework in Detail
themes are simply collections of images and css which can augment or replace your current ui elements.
...xbl (extensible binding language) allows you to expand your library of interface elements, and even construct your own xml language for defining your ui.
...you could easily create xml elements such as <chessboard> or <chesspiece> and via xbl map these to images and application logic.
...rdf, a core element to the framework, allows you to define dynamic elements in your ui (elements that may change after you have completed the application, such as a "history" menu item).
PyDOM - Archive of obsolete content
Archive › Mozilla › PyDOM
for example, let's say you have xul similar to pyxultest: top-level script code says something like: button = document.getelementbyid("some-button") button.foo = 0 and the button itself might look like: <button id="some-button" label="click here" onclick="event.target.foo += 1; print 'foo is now', event.target.foo"/> note that (a) we have stuck an arbitrary attribute on a dom element and (b) in all cases (e.g., event handler and top-level script), the dom node needs to be explicitly specified - the globals are th...
...the event handler could also have used getelementbyid - the point is that both the event handler and top-level script share the same namespace.
...this means that if you set the script-type to python for the window, python is the default script type for all child elements in the window.
... xul use a script-type attribute on your elements.
Properties - Archive of obsolete content
Archive › Mozilla › XPInstall › Reference › InstallVersion Object › Properties
properties major most siginificant element of the installversion object.
...major version of netscape 6 is "6" minor second most siginificant element of the installversion object.e.g.
... minor version of netscape communicator 4.7 is "7" release second least siginificant element of the installversion object.
... build least siginificant element of the installversion object.e.g.
Flexgroup - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › Flexgroup
"flexgroup" is used to group flexible elements together and should be set to an integer.
... elements with a lower flexgroup are flexed first.
... when those elements have reached their maximum sizes, the elements with the next higher flexgroup are flexed.
... this process continues until there are no more elements remaining.
browser.type - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › browser.type
subdocuments of chrome documents are of chrome type, unless the container element (one of iframe, browser or editor) has one of the special type attribute values (the common ones are content, content-targetable and content-primary) indicating that the subdocument is of content type.
... warning: the type attribute must be set before the element is inserted into the document.
...for instance, in a web browser, this would be the element that displays the web page.
...this is the preferred value for any browser element in an application, which will use multiple browsers of equal privileges, and is unselected at the moment.
collapse - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › collapse
you should put a grippy element inside the splitter when it is used for collapsing.
... before when the grippy is clicked, the element immediately before the splitter in the same parent is collapsed so that its width or height is 0.
... after when the grippy is clicked, the element immediately after the splitter in the same parent is collapsed so that its width or height is 0.
... both either the element immediately before the splitter, or the element immediately after the splitter can be collapsed, if the size of that element would fall below the minimum size due to the position of the splitter.
orient - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › orient
« xul reference home orient type: one of the values below used to specify whether the children of the element are oriented horizontally or vertically.
... the default value depends on the element.
... horizontal child elements of the element are placed next to each other in a row in the order that they appear in the xul source.
... vertical child elements of the element are placed under each other in a column in the order that they appear in the xul source.
pack - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › pack
« xul reference home pack type: one of the values below the pack attribute specifies where child elements of the box are placed when the box is larger that the size of the children.
... start child elements are placed starting from the left or top edge of the box.
... center extra space is split equally along each side of the child elements, resulting the children being placed in the center of the box.
... end child elements are placed on the right or bottom edge of the box.
preference-editable - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › preference-editable
« xul reference home preference-editable mozilla 1.8 type: boolean if true, the element may be used as one that modifies a preference in a prefwindow.
... the preference attribute may be used to connect to a preference element.
... this is useful for custom elements implemented in xbl.
... the element should fire change, command, or input event when the value is changed so that the preference will update accordingly.
resizebefore - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › resizebefore
« xul reference home resizebefore type: one of the values below this attribute indicates which element to the left or above the splitter should be resized when the splitter is repositioned.
... closest the element immediately to the left or above the splitter resizes.
... farthest the element that is the farthest away from the splitter to the left or above the splitter resizes.
... flex the closest flexible element resizes.
uri - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › uri
« xul reference home uri type: string for template-generated content, the attribute should be placed on the element where content generation should begin.
... thus, it should be placed on an element that is a descendant of a template.
... elements that appear inside the element with the attribute will be repeated for each node in the rdf datasource.
... elements outside will appear only once.
value - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › value
« xul reference home value type: string the string attribute allows you to associate a data value with an element.
...be aware, however, that some elements, such as textbox will display the value visually, so in order to merely associate data with an element, you could 1) use another attribute like "value2" or "data-myatt" (as in the html5 draft), as xul does not require validation (less future-proof); 2) use setattributens() to put custom attributes in a non-xul namespace (serializable and future-proof); 3) use setuserdata() (future-proof and clean, but not easily serializable).
... for user editable menulist elements, the contents, as visible to the user, are read and set using the menulist.value syntax.
... for those elements, setattribute("value", myvalue) and getattribute("value") do not access or affect the contents displayed to the user.
command - Archive of obsolete content
Archive › Mozilla › XUL › Events › command
the command event is executed when an element is activated.
... how it is activated varies for each element and in many cases, there are several ways to activate an element.
...command elements can be activated by any of their observing elements being activated.
... general info specification xul interface xulcommandevent bubbles yes cancelable yes target element default action none properties property type description target read only eventtarget the event target (the topmost target in the dom tree).
findbar - Archive of obsolete content
Archive › Mozilla › XUL › Findbar
for example, the standard findbar in firefox 3.5 looks like this on the mac: you may attach a findbar to a particular browser element by either setting the findbar's browserid attribute to the id of the browser element before the findbar element is bound, or by setting the findbar's browser property to the browser element itself.
...nextaccesskey, findpreviousaccesskey, highlightaccesskey, matchcaseaccesskey properties browser, findmode methods close, onfindagaincommand, open, startfind, togglehighlight example <browser type="content-primary" flex="1" id="content" src="about:blank"/> <findbar id="findtoolbar" browserid="content"/> attributes browserid type: string the id of the browser element to which the findbar is attached.
...ies align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, database, datasources, dir, , , flex, height, hidden, id, , , left, , maxheight, maxwidth, menu, minheight, minwidth, , , , , , , observes, ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width browser type: browser element lets you set and get the browser in which the findbar is located.
... possible values are: find_normal (0): normal find find_typeahead (1): typeahead find find_links (2): link find methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
insertItem - Archive of obsolete content
Archive › Mozilla › XUL › Method › insertItem
« xul reference home insertitem( id, beforenode, wrapper, beforepermanent ) not in seamonkey 1.x return type: element add an item with the given id to the toolbar.
...the third argument can be used to wrap the new item in another element.
... the id should match an element in the toolbar's toolbarpalette.
... the method returns the dom element for the created item.
Methods - Archive of obsolete content
Archive › Mozilla › XUL › Method
« xul reference home acceptdialog additemtoselection addpane addprogresslistener addsession addtab addtabsprogresslistener advance advanceselectedtab appendcustomtoolbar appendgroup appenditem appendnotification blur cancel canceldialog centerwindowonscreen checkadjacentelement clearresults clearselection click close collapsetoolbar contains decrease decreasepage docommand ensureelementisvisible ensureindexisvisible ensureselectedelementisvisible expandtoolbar extra1 extra2 focus getbrowseratindex getbrowserfordocument getbrowserfortab getbrowserindexfordocument getbutton getdefaultsession geteditor getelementsbyattribute getelementsbyattributens getformattedstring gethtmleditor getindexoffirstvi...
...goforward goforwardgroup gohome goto gotoindex goup hidepopup increase increasepage insertitem insertitemat invertselection loadgroup loadonetab loadtabs loaduri loaduriwithflags makeeditable movebyoffset moveto movetoalertposition onsearchcomplete ontextentered ontextreverted openpopup openpopupatscreen opensubdialog openwindow preferenceforelement reload reloadalltabs reloadtab reloadwithflags removeallitems removeallnotifications removealltabsbut removecurrentnotification removecurrenttab removeitemat removeitemfromselection removenotification removeprogresslistener removesession removetab removetabsprogresslistener removetransientnotifications replacegroup reset rewind scrollbyindex scrollbypix...
...els scrolltoindex select selectall selectitem selectitemrange selecttabatindex setselectionrange showpane showpopup sizeto startediting stop stopediting swapdocshells syncsessions timedselect toggleitemselection related dom element methods dom:element.addeventlistener dom:element.appendchild dom:element.comparedocumentposition dom:element.dispatchevent dom:element.getattribute dom:element.getattributenode dom:element.getattributenodens dom:element.getattributens dom:element.getelementsbytagname dom:element.getelementsbytagnamens dom:element.getfeature fixme: brokenlink dom:element.getuserdata dom:element.hasattribute dom:element.hasattributens dom:element.hasattributes dom:element.haschildnodes dom:element.insertbefore dom:el...
...ement.isequalnode dom:element.issamenode dom:element.issupported dom:element.lookupnamespaceuri dom:element.lookupprefix dom:element.normalize dom:element.removeattribute dom:element.removeattributenode dom:element.removeattributens dom:element.removechild dom:element.removeeventlistener dom:element.replacechild dom:element.setattribute dom:element.setattributenode dom:element.setattributenodens dom:element.setattributens dom:element.setuserdata ...
MenuButtons - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › MenuButtons
both the button and the toolbar button elements support two special types used for creating menu buttons.
... in either case, a menupopup element should be placed as a direct child of the button.
... when the command is fired, it bubbles up through the chain of elements to the top of the document.
... as with the 'menu' type, the 'menu-button' type may be applied to either the button or the toolbarbutton element.
PopupEvents - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › PopupEvents
this event will be fired even for elements that don't have a context menu associated with them.
...<script> function openfilemenu() { var filemenu = document.getelementbyid("file-menu"); filemenu.addeventlistener("popupshown", filemenuopened, false); filemenu.open = true; } function filemenuopened(event) { if (event.target != document.getelementbyid("file-menupopup")) return; var filemenu = document.getelementbyid("file-menu"); filemenu.removeeventlistener("popupshown", filemenuopened, false); var openmenu = document.getelementbyid("open-menu"...
...<panel onpopuphiding="document.getelementbyid('search').value = '';"> <textbox id="search"/> <button label="search" oncommand="dosearch();"/> </panel> you can prevent a popup from hiding by calling the event's preventdefault method.
...this is because there is no longer an element to send the events to.
PopupKeys - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › PopupKeys
handling keys within menus when using a menupopup element, a keyboard listener is attached to the window that will handle keypresses for the menu.
...unlike with a menu, when a panel is opened, the focus is removed from any element that has it.
... this allows the focus to be shifted to elements within the panel.
...when the ignorekeys attribute is placed on a <menupopup> or <panel> element, and its value is set to the value true, the key listener is not used.
tag - Archive of obsolete content
Archive › Mozilla › XUL › Property › tag
if set, the conditions will only match if the template builder is parsing content for an element directly inside this tag.
... for example, by using a value of treechildren, the condition will only match when placing elements directly inside a treechildren tag.
... thus, nested elements will not match because they are directly inside a treeitem.
... this attribute is useful to provide different rules for outer and inner elements.
Property - Archive of obsolete content
Archive › Mozilla › XUL › Property
node firstordinalcolumn firstpermanentchild flex focused focuseditem forcecomplete group handlectrlpageupdown handlectrltab hasuservalue height hidden hideseconds highlightnonmatches homepage hour hourleadingzero id ignoreblurwhilesearching image increment inputfield inverted is24hourclock ispm issearching iswaiting itemcount label labelelement lastpermanentchild lastselected left linkedpanel listboxobject locked markupdocumentviewer max maxheight maxlength maxrows maxwidth menu menuboxobject menupopup min minheight minresultsforpopup minwidth minute minuteleadingzero mode month monthleadingzero name next nomatch notificationshidden object observes onfirstpage onlastpage ...
...open ordinal orient pack pagecount pageid pageincrement pageindex pagestep parentcontainer palette persist persistence placeholder pmindicator popup popupboxobject popupopen position predicate preferenceelements preferencepanes preferences priority radiogroup readonly readonly ref resource resultspopup scrollboxobject scrollincrement scrollheight scrollwidth searchbutton searchcount searchlabel searchparam searchsessions second secondleadingzero securityui selected selectedbrowser selectedcount selectedindex selecteditem selecteditems selectedpanel selectedtab selectionend selectionstart selstyle seltype sessioncount sessionhistory showcommentcolumn showpopup size smoothscroll ...
...ings style subject suppressonselect tabcontainer tabindex tabs tabscrolling tabpanels tag textlength textvalue timeout title toolbarname toolbarset tooltip tooltiptext top treeboxobject type uri useraction value valuenumber view webbrowserefind webnavigation webprogress width wizardpages wraparound year yearleadingzero related dom element properties dom:element.attributes dom:element.baseuri dom:element.childelementcount dom:element.childnodes dom:element.children dom:element.clientheight dom:element.clientleft dom:element.clienttop dom:element.clientwidth dom:element.clonenode dom:element.firstchild dom:element.firstelementchild dom:element.lastchild dom:element.lastelementchild dom:element.localnam...
...e dom:element.namespaceuri dom:element.nextelementsibling dom:element.nextsibling dom:element.nodename dom:element.nodetype dom:element.nodevalue dom:element.ownerdocument dom:element.parentnode dom:element.prefix dom:element.previouselementsibling dom:element.previoussibling dom:element.scrollheight dom:element.scrollleft dom:element.scrolltop dom:element.scrollwidth dom:element.tagname dom:element.textcontent ...
Sorting and filtering a custom tree view - Archive of obsolete content
Archive › Mozilla › XUL › Sorting and filtering a custom tree view
sort(this)" class="sortdirectionindicator"/> <splitter class="tree-splitter"/> <treecol id="weapon" label="weapon" flex="1" persist="width ordinal hidden" onclick="sort(this)" class="sortdirectionindicator"/> </treecols> <treechildren id="tree-children"/> </tree> </window> sort.js var table = null; var data = null; var tree; var filtertext = ""; function init() { tree = document.getelementbyid("tree"); loadtable(); } //this function is called every time the tree is sorted, filtered, or reloaded function loadtable() { //remember scroll position.
...h({name: "shredder", description: "armored man", weapon: "blades"}); data.push({name: "casey jones", description: "goalie masked man", weapon: "hockey stick"}); data.push({name: "april o'neil", description: "journalist", weapon: "none"}); } if (filtertext == "") { //show all of them table = data; } else { //filter out the ones we want to display table = []; data.foreach(function(element) { //we'll match on every property for (var i in element) { if (prepareforcomparison(element[i]).indexof(filtertext) != -1) { table.push(element); break; } } }); } sort(); //restore scroll position if (topvisiblerow) { settopvisiblerow(topvisiblerow); } } //generic custom tree view stuff function treeview(table) { this.rowcount = table.length; this.getcell...
..."ascending" : "descending"); tree.setattribute("sortresource", columnname); tree.view = new treeview(table); //set the appropriate attributes to show to indicator var cols = tree.getelementsbytagname("treecol"); for (var i = 0; i < cols.length; i++) { cols[i].removeattribute("sortdirection"); } document.getelementbyid(columnname).setattribute("sortdirection", order == 1 ?
... return o.tolowercase(); } return o; } function gettopvisiblerow() { return tree.treeboxobject.getfirstvisiblerow(); } function settopvisiblerow(topvisiblerow) { return tree.treeboxobject.scrolltorow(topvisiblerow); } function inputfilter(event) { //do this now rather than doing it at every comparison var value = prepareforcomparison(event.target.value); setfilter(value); document.getelementbyid("clearfilter").disabled = value.length == 0; } function clearfilter() { document.getelementbyid("clearfilter").disabled = true; var filterelement = document.getelementbyid("filter"); filterelement.focus(); filterelement.value = ""; setfilter(""); } function setfilter(text) { filtertext = text; loadtable(); } ...
Introduction - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Introduction
in xul, the datasource is specified by placing the datasources attribute on an element.
...when the xul parser sees an element with this attribute, it constructs a template builder for the element and attaches it to the element.
... it is expected that there will be a template inside the element.
...you can get this composite datasource in a script by using an element's 'database' property if you want to add or remove datasources from it.
Tree Widget Changes - Archive of obsolete content
Archive › Mozilla › XUL › Tree Widget Changes
there are no changes to xul tree tags, however the id attribute is no longer required on treecol elements just to get them to work.
...a tree will have one of these objects for each column (each treecol element) in the tree.
... to get a column in javascript: tree.columns.getcolumnfor(treecolelement); tree.columns.getnamedcolumn(treecolid); tree.columns.getcolumnat(index); you can also just use array syntax to get a column: tree.columns["lastname"]; tree.columns[5]; once you have a column, you can get various properties of it: column.index - the index of the column in displayed order column.id - the id attribute of the column column.element - the treecol element column.x - the x p...
... the nsitreeview.cycleheader() method has been changed, cycleheader(colid, element) is now just cycleheader(column), since the code can get the element from the column object.
Accesskey display rules - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Accesskey display rules
xul elements display their accesskeys in their label automatically if it's necessary.
...xul elements don't display any accesskeys on mac xul elements don't display any accesskeys on mac.
... if a label doesn't have the character, xul elements append the accesskey character with parentheses.
...xul elements check "intl.menuitems.alwaysappendaccesskeys" pref value whether they should append accesskey text always.
Creating a Skin - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Creating a Skin
four elements, the menubar, the menupopup, the toolbar and the tabpanels appear in light blue.
... the border around these four elements has been changed to give a heavier 3d appearance.
...opensearch { list-style-image: url("chrome://editor/skin/icons/btn1.gif"); -moz-image-region: rect(48px 16px 64px 0); -moz-box-orient: vertical; } #savesearch { list-style-image: url("chrome://editor/skin/icons/btn1.gif"); -moz-image-region: rect(80px 16px 96px 0); -moz-box-orient: vertical; } mozilla provides a custom style property -moz-image-region which can be used to make an element use part of an image.
...we could continue by changing the menus, the grippies on the toolbar and the input and checkbox elements.
Features of a Window - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Features of a Window
for example: var mywin = window.open("chrome://findfile/content/findfile.xul", "findfile", "chrome"); specifying the width and height you should have noticed that whenever elements were added to a window, the window's width expanded to fit the new elements.
...if you leave it out, the size is determined by the elements that are in it.
...even if there aren't enough elements to fit this size, the window will still open at this size and there will be blank space in the remaining area.
... if there are too many elements, the window will not be large enough to fit the elements.
Tree Box Objects - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Tree Box Objects
example 1 : source view <script> function doscroll(){ var value = document.getelementbyid("tbox").value; var tree = document.getelementbyid("thetree"); var boxobject = tree.boxobject; boxobject.queryinterface(components.interfaces.nsitreeboxobject); boxobject.scrolltorow(value); } </script> <tree id="thetree" rows="4"> <treecols> <treecol id="row" label="row" primary="true" flex="1"/> </treecols> <treechildren> <treeitem label="row 0"/> <treeitem label=...
... example 2 : source view <script> function updatefields(event){ var row = {}, column = {}, part = {}; var tree = document.getelementbyid("thetree"); var boxobject = tree.boxobject; boxobject.queryinterface(components.interfaces.nsitreeboxobject); boxobject.getcellat(event.clientx, event.clienty, row, column, part); if (column.value && typeof column.value != "string") column.value = column.value.id; document.getelementbyid("row").value = row.value; document.getelementbyid("column").value = column.value; doc...
...ument.getelementbyid("part").value = part.value; } </script> <tree id="thetree" flex="1" onmousemove="updatefields(event);"> <treecols> <treecol id="utensil" label="utensil" primary="true" flex="1"/> <treecol id="count" label="count" flex="1"/> </treecols> <treechildren> <treeitem> <treerow> <treecell label="fork"/> <treecell label="5"/> </treerow> </treeitem> <treeitem> <treerow> <treecell label="knife"/> <treecell label="2"/> </treerow> </treeitem> <treeitem> <treerow> <treecell label="spoon"/> <treecell label="8"/> </treerow> </treeitem> </treechildren> </tree> <label value="row:"/> <label id="row"/> <label value="column:"/> <label id="column"/> <label value="child typ...
... next, we'll look at rdf which can be used to automatically populate trees and other elements.
Using Visual Studio as your XUL IDE - Archive of obsolete content
Archive › Mozilla › XUL › Using Visual Studio as your XUL IDE
compared to a simple text-editor, visual studio gives you some special features when writing xul: intellisense / autocompletion for elements and attributes validation syntax coloring (okay, more sophisticated editors like notepad++ provide this as well) before you can use all of this, you have to adjust visual studio a little.
...visual studio will use the schema based on the namespace, so make sure your window element uses the correct xul namespace http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul.
...xbl if you are writing your own elements in xbl, you can download a xbl schema from mozilla.doslash.org/xblschema.
...to combine both, you can also add your own xbl elements to the xul schema to get autocompletion-support and validation for those in your xul files.
XUL Reference - Archive of obsolete content
Archive › Mozilla › XUL › XUL Reference
« xul reference « alphabetical list of all xul elements action arrowscrollbox assign bbox binding bindings box broadcaster broadcasterset button browser checkbox caption clicktoscroll colorpicker column columns commandset command conditions content datepicker deck description dialog dialogheader dropmarker editor grid grippy groupbox hbox iframe image key keyset label listbox listcell listcol listcols listhead listheader listitem member menu menubar menuitem menulist menupopup menuseparator notification notificationbox observes overlay page panel param popupset preference preferences prefpane prefwindow progressmeter query queryset radio radiogroup resizer richlistbox richlistitem row rows rule scale script ...
...tbox textbox (firefox autocomplete) textbox (mozilla autocomplete) timepicker titlebar toolbar toolbarbutton toolbargrippy toolbaritem toolbarpalette toolbarseparator toolbarset toolbarspacer toolbarspring toolbox tooltip tree treecell treechildren treecol treecols treeitem treerow treeseparator triple vbox where window wizard wizardpage categorical list of all xul elements « xul reference « windows window wizard wizardpage titlebar window structure --- menus and popups --- toolbars toolbar toolbarbutton toolbargrippy toolbaritem toolbarpallete toolbarseperator toolbarspring tabs and grouping tab tabbox tabpanel tabpanels tabs controls --- text and images label caption image lists --- trees ...
... --- layout --- templates --- scripting --- helper elements other xul lists dialog overlay page window wizard wizardpage preference preferences prefpane prefwindow browser tabbrowser editor iframe titlebar resizer statusbar statusbarpanel dialogheader notification notificationbox menubar menu menuitem menuseparator menupopup panel tooltip popupset toolbar toolbarbutton toolbargrippy toolbaritem toolbarpalette toolbarseparator toolbarset toolbarspacer toolbarspring toolbox tabbox tabs tab tabpanels tabpanel groupbox caption separator spacer button checkbox colorpicker datepicker menulist progressmeter radio radiogroup scale splitter textbox textbox (firefox autocomplete) textbox (mozilla autocomplete) ti...
...rollbox action assign binding bindings conditions content member param query queryset rule template textnode triple where script commandset command broadcaster broadcasterset observes key keyset stringbundle stringbundleset arrowscrollbox dropmarker grippy scrollbar scrollcorner spinbuttons all attributes all properties all methods attributes defined for all xul elements style classes event handlers deprecated/defunct markup ...
action - Archive of obsolete content
Archive › Mozilla › XUL › action
the action should be contained within a query or rule element.
...this element and its descendants may use variables in place of attribute values.
... examples example needed attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, s...
..., ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
dialog - Archive of obsolete content
Archive › Mozilla › XUL › dialog
« xul reference home [ examples | attributes | properties | methods | related ] this element should be used in place of the window element for dialog boxes.
... methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattributenode(),...
... getbutton( type ) return type: button element returns the button element in the dialog corresponding to the given type.
... related elements dialogheader ...
dropmarker - Archive of obsolete content
Archive › Mozilla › XUL › dropmarker
a dropmarker is not intended to be used as a separate element, but as part of another element.
... examples properties accessibletype attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties accessibletype type: integer ...
... a value indicating the type of accessibility object for the element.
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
script - Archive of obsolete content
Archive › Mozilla › XUL › script
« xul reference home [ examples | attributes | properties | methods | related ] much like the html script element, this is used to declare a script to be used by the xul window.
... inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, remove...
...element, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, database, datasources, dir, , , flex, height, hidden, id, , , left, , maxheight, maxwidth, menu, minheight, minwidth, , , , , , , observes, ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getcli...
...entrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattributenode(), removeattributens(), removechild(), removeeventlistener(), replacechild(), setattribute(), setattributenode(), setattributenodens(), setattributens(), setuserdata ...
spacer - Archive of obsolete content
Archive › Mozilla › XUL › spacer
« xul reference home [ examples | attributes | properties | methods | related ] an element that takes up space but does not display anything.
... examples <box> <button label="left"/> <spacer flex="1"/> <button label="right"/> </box> attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, remove...
...element, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, database, datasources, dir, , , flex, height, hidden, id, , , left, , maxheight, maxwidth, menu, minheight, minwidth, , , , , , , observes, ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getcli...
...entrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattributenode(), removeattributens(), removechild(), removeeventlistener(), replacechild(), setattribute(), setattributenode(), setattributenodens(), setattributens(), setuserdata related elements separator, splitter ...
toolbargrippy - Archive of obsolete content
Archive › Mozilla › XUL › toolbargrippy
this element is used internally by the toolbar and should only be used directly when modifying its theme.
... properties accessible examples (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties accessible type: nsiaccessible returns the accessibility object for the element.
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
...ibutenode(), removeattributens(), removechild(), removeeventlistener(), replacechild(), setattribute(), setattributenode(), setattributenodens(), setattributens(), setuserdata related elements toolbar, toolbarbutton, toolbaritem, toolbarpalette, toolbarseparator, toolbarset, toolbarspacer, toolbarspring, toolbox interfaces nsiaccessibleprovider ...
toolbarseparator - Archive of obsolete content
Archive › Mozilla › XUL › toolbarseparator
properties accessibletype examples <toolbox> <toolbar> <toolbarbutton label="button 1"/> <toolbarseparator /> <toolbarbutton label="button 2"/> </toolbar> </toolbox> attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, remove...
...element, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties accessibletype type: integer a value indicating the type of accessibility object for the element.
...s, ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
...ibutenode(), removeattributens(), removechild(), removeeventlistener(), replacechild(), setattribute(), setattributenode(), setattributenodens(), setattributens(), setuserdata related elements toolbar, toolbarbutton, toolbargrippy, toolbaritem, toolbarpalette, toolbarset, toolbarspacer, toolbarspring, toolbox ...
toolbarset - Archive of obsolete content
Archive › Mozilla › XUL › toolbarset
« xul reference home [ examples | attributes | properties | methods | related ] firefox only this element is used as a container for custom toolbars, which are added in the custom toolbar dialog.
... examples (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, database, datasources, dir, , , flex, height, hidden, id, ,...
...s, ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
...ibutenode(), removeattributens(), removechild(), removeeventlistener(), replacechild(), setattribute(), setattributenode(), setattributenodens(), setattributens(), setuserdata related elements toolbar, toolbarbutton, toolbargrippy, toolbaritem, toolbarpalette, toolbarseparator, toolbarspacer, toolbox ...
toolbarspacer - Archive of obsolete content
Archive › Mozilla › XUL › toolbarspacer
properties accessibletype examples (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties ...
...accessibletype type: integer a value indicating the type of accessibility object for the element.
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
...ibutenode(), removeattributens(), removechild(), removeeventlistener(), replacechild(), setattribute(), setattributenode(), setattributenodens(), setattributens(), setuserdata related elements toolbar, toolbarbutton, toolbargrippy, toolbaritem, toolbarpalette, toolbarseparator, toolbarset, toolbarspring, toolbox interfaces nsiaccessibleprovider ...
toolbarspring - Archive of obsolete content
Archive › Mozilla › XUL › toolbarspring
properties accessibletype examples (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width prope...
...rties accessibletype type: integer a value indicating the type of accessibility object for the element.
...s, ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
...ibutenode(), removeattributens(), removechild(), removeeventlistener(), replacechild(), setattribute(), setattributenode(), setattributenodens(), setattributens(), setuserdata related elements toolbar, toolbarbutton, toolbargrippy, toolbaritem, toolbarpalette, toolbarseparator, toolbarset, toolbarspacer, toolbox interfaces nsiaccessibleprovider ...
treeseparator - Archive of obsolete content
Archive › Mozilla › XUL › treeseparator
attributes properties examples (example needed) attributes properties type: space-separated list of property names sets the properties of the element, which can be used to style the element.
... inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, database, datasources, dir, , , flex, height, hidd...
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
...ibutenode(), removeattributens(), removechild(), removeeventlistener(), replacechild(), setattribute(), setattributenode(), setattributenodens(), setattributens(), setuserdata related elements tree, treecols, treecol, treechildren, treeitem, treerow and treecell.
where - Archive of obsolete content
Archive › Mozilla › XUL › where
for more information, see where elements.
... inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, remove...
...element, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, database, datasources, dir, , , flex, height, hidden, id, , , left, , maxheight, maxwidth, menu, minheight, minwidth, , , , , , , observes, ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getcli...
...entrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattributenode(), removeattributens(), removechild(), removeeventlistener(), replacechild(), setattribute(), setattributenode(), setattributenodens(), setattributens(), setuserdata ...
2006-09-29 - Archive of obsolete content
Archive › Newsgroup summaries › mozilla-dev-tech-layout › 2006-09-29
discussions discussion on how the firefox 1.5.0.7 dom generates xhtml inline elements using wordpress.
... it was determined that the generated elements from wordpress do not follow the wc3 guidelines in appendix c of xhtml 1.0.
... although the w3 validation accepted the generated xhtml as valid, a bug identified within the html working group ignored the invalid elements.
... * * @param aavailwidth the available width into which the element is * being placed (i.e., the width of its containing * block).
SAX - Archive of obsolete content
Archive › SAX
elements, attributes, whitespace, and processing instructions).
... an example implementation of the most commonly used content handler: function print(s) { dump(s + "\n"); } xmlreader.contenthandler = { // nsisaxcontenthandler startdocument: function() { print("startdocument"); }, enddocument: function() { print("enddocument"); }, startelement: function(uri, localname, qname, /*nsisaxattributes*/ attributes) { var attrs = []; for(var i=0; i<attributes.length; i++) { attrs.push(attributes.getqname(i) + "='" + attributes.getvalue(i) + "'"); } print("startelement: namespace='" + uri + "', localname='" + localname + "', qname='" + qname + "', attributes={" + attrs.join(",") + "}")...
...; }, endelement: function(uri, localname, qname) { print("endelement: namespace='" + uri + "', localname='" + localname + "', qname='" + qname + "'"); }, characters: function(value) { print("characters: " + value); }, processinginstruction: function(target, data) { print("processinginstruction: target='" + target + "', data='" + data + "'"); }, ignorablewhitespace: function(whitespace) { // don't care }, startprefixmapping: function(prefix, uri) { // don't care }, endprefixmapping: function(prefix) { // don't care }, // nsisupports queryinterface: function(iid) { if(!iid.equals(components.interfaces.nsisupports) && !iid.equals(components.interfaces.nsisaxcontenthandler)) throw components.results.ns_e...
...below is an example of parsing from a string: xmlreader.parsefromstring("<f:a xmlns:f='g' d='1'><bbq/></f:a>", "text/xml"); this call results in the following output (assuming the content handler from the example above is used): startdocument startelement: namespace='g', localname='a', qname='f:a', attributes={d='1'} startelement: namespace='', localname='bbq', qname='bbq', attributes={} endelement: namespace='', localname='bbq', qname='bbq' endelement: namespace='g', localname='a', qname='f:a' enddocument ...
-moz-stack-sizing - Archive of obsolete content
Archive › Web › CSS › -moz-stack-sizing
normally, a <xul:stack> will change its size so that all of its child elements are completely visible.
... /* keyword values */ -moz-stack-sizing: auto; -moz-stack-sizing: ignore; /* global values */ -moz-stack-sizing: inherit; -moz-stack-sizing: initial; -moz-stack-sizing: unset; if you wish to prevent the stack from resizing automatically to accommodate its children, you can set -moz-stack-sizing to ignore on the child element.
... note: in previous versions of gecko it was possible to work around the problem by setting very large negative bottom and right margins on the stack element and equally large positive bottom and right margins on the children whose size you didn't want to ignore.
... (the problem does not affect children moved above or to the left of the stack.) initial valuestretch-to-fitapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values stretch-to-fit the child will influence the stack's size.
-ms-content-zoom-chaining - Archive of obsolete content
Archive › Web › CSS › -ms-content-zoom-chaining
initial valuenoneapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values none the initial value.
... chained the nearest zoomable parent element begins zooming when the user hits a zoom limit during page manipulation.
... remarks this property has no effect on non-zoomable elements.
... for information on zoomable elements, see -ms-content-zooming.
-ms-content-zoom-limit-max - Archive of obsolete content
Archive › Web › CSS › -ms-content-zoom-limit-max
the -ms-content-zoom-limit-max css property is a microsoft extension that specifies the selected elements' maximum zoom factor.
... initial value400%applies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednopercentagesthe largest allowed zoom factor.
...this property has no effect on non-zoomable elements.
... see -ms-content-zooming for details on zoomable elements.
Descendants and Filters - Archive of obsolete content
Archive › Web › E4X tutorial › Descendants and Filters
« previousnext » accessing descendants in many cases, the node that you're interested in is not the direct child of the top xml element.
...for instance var element = <pets> <dogs> <fido color="red"/> <spike color="blue"/> </dogs> </pets>; element..fido.@color = "green"; element..spike.@color = "purple"; changes the colors of both of our pet dogs.
...that is, if there are multiple descendants of the requested type, an xml list is returned, instead of the normal element.
...consider var element = <dogs> <fido color="brown"/> <spike color="black"/> <killer color="brown"/> </dogs>; var list = element.*.(@color == "brown"); originally, elements.* returns a list with all 3 dogs in it.
Namespaces - Archive of obsolete content
Archive › Web › E4X tutorial › Namespaces
« previousnext » e4x and namespaces oftentimes, xml documents will contain elements from a variety of namespaces.
...the localname property returns the name of the element, without any namespace prefix.
... the uri property returns the uri of the namespace that the element is in.
...info.uri; // returns "http://www.w3.org/1999/xhtml" elements in no namespace return the empty string as their uri.
The global XML object - Archive of obsolete content
Archive › Web › E4X tutorial › The global XML object
xml elements will remember the settings of the xml object from the time of their creation.
...the following example defines the foocount() method, which returns the amount of <foo> elements in the xml: xml.prototype.function::foocount = function foocount() { return this..foo.length(); }; <foobar><foo/><foo/><foo/></foobar>.foocount() // returns 3 ignorecomments true by default.
...observe: var element = <foo> <!-- my comment --> <bar/> </foo>; element.comments().length(); // returns 0 element.toxmlstring(); // returns <foo><bar/></foo> xml.ignorecomments = false; element = <foo> <!-- my comment --> <bar/> </foo>; element.comments().length(); // returns 1 element.toxmlstring(); // returns <foo><!-- my comment --><bar/></foo> ignoreprocessinginstructions true by default.
...for example var element = <foo> <?process x="true"?> <bar/> <?process x="false"?> </foo>; element.toxmlstring(); // returns <foo><bar/></foo> xml.ignoreprocessinginstructions = false; var element = <foo> <?process x="true"?> <bar/> <?process x="false"?> </foo>; element.toxmlstring(); // returns <foo><?process x="true"?><bar/><?process x="false"?></foo> ignorewhitespace true by default.
New in JavaScript 1.3 - Archive of obsolete content
Archive › Web › JavaScript › New in JavaScript › 1.3
array.prototype.push(): in javascript 1.2, the push method returned the last element added to an array.
... array.prototype.slice(): in javascript 1.2, the splice method returned the element removed, if only one element was removed (howmany parameter is 1).
... in javascript 1.3, splice always returns an array containing the removed elements.
... if one element is removed, an array of one element is returned.
JSObject - Archive of obsolete content
Archive › Web › LiveConnect › LiveConnect Reference › JSObject
getslot retrieves the value of an array element of a javascript object.
... setslot sets the value of an array element of a javascript object.
...retrieves the value of an array element of a javascript object.
...sets the value of an array element of a javascript object.
Examples - Archive of obsolete content
Archive › Web › Properly Using CSS and JavaScript in XHTML Documents › Examples
</p> <p> this document contains inline css rules contained in a <code>style</code> element and surrounded by a comment and javascript contained in a <code>script</code> element and surrounded by a comment.
... </p> <p> this document contains inline css rules contained in a <code>style</code> element and surrounded by a sgml comment.
... </p> <p> this document contains inline css rules contained in a <code>style</code> element and surrounded by a sgml comment.
... </p> <p> this document contains inline css rules contained in a <code>style</code> element and surrounded by a sgml comment.
Troubleshooting XForms Forms - Archive of obsolete content
Archive › Web › XForms › Form Troubleshooting
ensure that your <html> element contains the supported namespace declaration: xmlns="http://www.w3.org/1999/xhtml" (instead of the newer, unratified version, xhtml 2.0, located at http://www.w3.org/2002/06/xhtml2 ) inline instance, no controls get bound have you remembered to use the correct namespace for the instance nodes?
... if your binding expression contains a /, look for any containing xf:group, xf:repeat, xf:input or other elements that set the context node.
... instance(...) not working be aware that the instance(...) returns an element node, and not the document node.
... so with an instance like this: <xf:instance id="ins2" xmlns=""> <data> <value>42</value> </data> </xf:instance> you should use <output ref="instance('ins2')/value"/> to show the contents of the value element.
RDF in Mozilla FAQ - Archive of obsolete content
Archive › Web Standards › RDF in Mozilla FAQ
xul templates xul templates are created by specifying a datasources attribute on an element in a xul document.
...*/; // get the dom element for 'my-tree' var tree = document.getelementbyid('my-tree'); // add our datasource to it tree.database.adddatasource(ds); // force the tree to rebuild *now*.
...tree.builder.rebuild(); any xul element with a datasources attribute will "get" a database property and a builder property.
... to insert plaintext in a template, use the <text> element.
Building up a basic demo with Three.js - Game development
Games › Techniques › 3D on the web › Building up a basic demo with Three.js
body { margin: 0; padding: 0; } canvas { width: 100%; height: 100%; } </style> </head> <body> <script src="three.min.js"></script> <script> var width = window.innerwidth; var height = window.innerheight; /* all our javascript code goes here */ </script> </body> </html> it contains some basic information like the document <title>, and some css to set the width and height of the <canvas> element, that three.js will insert on the page to 100% to fill the entire available viewport space.
... the first <script> element includes the three.js library in the page, and we will write our example code inside the second.
... var renderer = new three.webglrenderer({antialias:true}); renderer.setsize(width, height); renderer.setclearcolor(0xdddddd, 1); document.body.appendchild(renderer.domelement); we are creating a new webgl renderer, setting its size to fit the whole available space on the screen, and appending the dom structure to the page.
... add this code into our second <script> element, just below the javascript comment.
Plug-in Development Overview - Gecko Plugin API Reference
Gecko Plugin API Reference › Plug-in Development Overview
for information about the html elements to use, see using html to display plug-ins.
...the data can come from either an object element in an html file (where the object or embed element either specifies the mime type directly or references a file of that type), from a separate non-html file of that mime type, or from the server.
... making plug-ins scriptable scriptable plug-ins are plug-ins that have been extended to provide methods that can be called from javascript and the dom when accessed through the object or embed element.
... consider the following example, where a media player plug-in can be controlled with an advancetonextsong() method called inside the script element: <object id="myplugin" type="audio/wav" data="music.wav"> </object> <script type="application/javascript"> var theplugin = document.getelementbyid('myplugin'); if (theplugin && theplugin.advancetonextsong) theplugin.advancetonextsong(); else alert("plugin not installed correctly"); </script> in the past, liveconnect and later xpconnect were used to make plug-ins scriptable.
Block (CSS) - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Block › CSS
a block on a webpage is an html element that appears on a new line, i.e.
... underneath the preceding element in a horizontal writing mode, and above the following element (commonly known as a block-level element).
... for example, <p> is by default a block-level element, whereas <a> is an inline element — you can put several links next to one another in your html source and they will sit on the same line as one another in the rendered output.
... using the display property you can change whether an element displays inline or as a block (among many other options); blocks are also subject to the effects of positioning schemes and use of the position property.
IDL - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › IDL
the content attribute is the attribute as you set it from the content (the html code) and you can set it or get it via element.setattribute() or element.getattribute().
...for example, to set an <input> element's maxlength to 42 using the content attribute, you have to call setattribute("maxlength", "42") on that element.
...these are the attributes you can read or set using javascript properties like element.foo.
...for example, the default type for <input> elements is "text", so if you set input.type="foobar", the <input> element will be of type text (in the appearance and the behavior) but the "type" content attribute's value will be "foobar".
Intrinsic Size - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Intrinsic Size
in css, the intrinsic size of an element is the size it would be based on its content, if no external factors were applied to it.
... for example, inline elements are sized intrinsically: width, height, and vertical margin and padding have no impact, though horizontal margin and padding do.
... intrinsic sizing takes into account the min-content and max-content size of an element.
...the keyword value of min-content for the width property will size an element according to the min-content size.
Tag - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Tag
in html, a tag is used for creating an element.
... the name of an html element is the name used in angle brackets such as <p> for paragraph.
... note that the end tag's name is preceded by a slash character, </p>, and that in empty elements, the end tag is neither required nor allowed.
... learn more general knowledge html element on wikipedia html elements syntax on whatwg technical reference introduction to html ...
caret - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › caret
on the web, a caret is used to represent the insertion point in <input> and <textarea> elements, as well as any elements whose contenteditable attribute is set, thereby allowing the contents of the element to be edited by the user.
... learn more general knowledge caret navigation on wikipedia css related to the caret you can set the color of the caret for a given element's editable content by setting the element's css caret-color property to the appropriate <color> value.
... html elements that may present a caret these elements provide text entry fields or boxes and therefore make use of the caret.
... <input type="text"> <input type="password"> <input type="search"> <input type="date">, <input type="time">, <input type="datetime">, and <input type="datetime-local"> <input type="number">, <input type="range"> <input type="email">, <input type="tel">, and <input type="url"> <textarea> any element with its contenteditable attribute set ...
Grids - Learn web development
Learn › CSS › CSS layout › Grids
a grid is a collection of horizontal and vertical lines creating a pattern against which we can line up our design elements.
... they help us to create designs where elements don’t jump around or change width as we move from page to page, providing greater consistency on our websites.
... we will instead place all of the elements for our site on the grid, using the grid lines.
... positioning with grid-template-areas an alternative way to place items on your grid is to use the grid-template-areas property and giving the various elements of your design a name.
Beginner's guide to media queries - Learn web development
Learn › CSS › CSS layout › Media queries
this feature means you can test if the user has the ability to hover over an element, which essentially means they are using some kind of pointing device; touchscreen and keyboard navigation does not hover.
... @media screen and (min-width: 40em) { article { display: grid; grid-template-columns: 3fr 1fr; column-gap: 20px; } nav ul { display: flex; } nav li { flex: 1; } } this css gives us a two-column layout inside the article, of the article content and related information in the aside element.
...inside a media query we'll make the main element into a two column grid.
... the viewport meta tag if you look at the html source in the above example, you'll see the following element included in the head of the document: <meta name="viewport" content="width=device-width,initial-scale=1"> this is the viewport meta tag — it exists as a way control how mobile browsers render content.
Multiple-column layout - Learn web development
Learn › CSS › CSS layout › Multiple-column Layout
spanning columns you can cause an element to span across all of the columns.
... in this case the content breaks when the spanning element is introduced and continues below creating a new set of column boxes.
... to cause an element to span all of the columns use the column-span property set to all.
... note that it isn't possible to cause an element to span some columns.
Responsive design - Learn web development
Learn › CSS › CSS layout › Responsive Design
flexible floated layouts were achieved by giving each element a percentage width, and ensuring that across the layout the totals were not more than 100%.
... responsive images, using the <picture> element and the <img> srcset and sizes attributes solve both of these problems.
... responsive typography an element of responsive design not covered in earlier work was the idea of responsive typography.
...they can be used to tweak any element to make it more usable or attractive at alternate screen sizes.
How can we design for all types of users? - Learn web development
Learn › Common questions › Design for all types of users
relative units also called proportional units, relative units are computed relative to a parent element.
... relative units are expressed in em, % and rem: percent-based sizes: % this unit tells your browser that an element's font size must be n% of the previous element whose font size was expressed.
... rem-based sizes: rem this unit is proportional to the root element's font size and is expressed as portions of 1, like em.
...this unit is relative to the root element's size and not to any other parent.
Using data attributes - Learn web development
Learn › HTML › Howto › Use data attributes
html5 is designed with extensibility in mind for data that should be associated with a particular element but need not have any defined meaning.
... data-* attributes allow us to store extra information on standard, semantic html elements without other hacks such as non-standard attributes, extra properties on dom, or node.setuserdata().
...any attribute on any element whose attribute name starts with data- is a data attribute.
... that said, though, for custom element-associated metadata, they are a great solution.
Silly story generator - Learn web development
Learn › JavaScript › First steps › Silly story generator
if the online editor you are using doesn't have a separate javascript panel, feel free to put it inline in a <script> element inside the html page.
... apply the external javascript file to your html by inserting a <script> element into your html referencing main.js.
...this gives you three variables that store references to the "enter custom name" text field (customname), the "generate random story" button (randomize), and the <p> element at the bottom of the html body that the story will be copied into (story), respectively.
...the following for example turns the background of the <html> element red — so the entire browser window should go red if the javascript is applied properly: document.queryselector('html').style.backgroundcolor = 'red'; math.round() is a built-in javascript method that simply rounds the result of a calculation to the nearest whole number.
Object building practice - Learn web development
Learn › JavaScript › Objects › Object building practice
these contain the following, respectively: a very simple html document featuring an <h1> element, a <canvas> element to draw our balls on, and elements to apply our css and javascript to our html.
... some javascript that serves to set up the <canvas> element and provide a general function that we're going to use.
... the first part of the script looks like so: const canvas = document.queryselector('canvas'); const ctx = canvas.getcontext('2d'); const width = canvas.width = window.innerwidth; const height = canvas.height = window.innerheight; this script gets a reference to the <canvas> element, then calls the getcontext() method on it to give us a context on which we can start to draw.
... next, we set constants called width and height, and the width and height of the canvas element (represented by the canvas.width and canvas.height properties) to equal the width and height of the browser viewport (the area that the webpage appears on — this can be gotten from the window.innerwidth and window.innerheight properties).
CSS performance optimization - Learn web development
Learn › Performance › CSS
some elements, including <video>, <canvas> and <iframe>, are also on their own layer.
... when an element is promoted as a layer, also known as composited, animating transform properties is done in the gpu, resulting in improved performance, especially on mobile.
... will-change property the css will-change property tells browsers which properties of an element are expected to change enabling browsers to set up optimizations before the element is actually changed, improving performance by doing potentially expensive work before it is required.
... @font-face { font-family: somefont; src: url(/path/to/fonts/somefont.woff) format('woff'); font-weight: 400; font-style: normal; font-display: fallback; } the contain property the contain css property allows an author to indicate that an element and its contents are, as much as possible, independent of the rest of the document tree.
Multimedia: Images - Learn web development
Learn › Performance › Multimedia
this can be done via the <picture> element with the help of a <source> element equipped with a type attribute.
... and finally, should you want to include animated images into your page, then know that safari allows using video files within <img> and <picture> elements.
...that's where you would need to upgrade your <picture> and <source> elements with media and/or sizes attributes.
... the first thing to check is that your content images use <img> elements and your background images are defined in css with background-image — images referenced in <img> elements are assigned a higher loading priority than background images.
Perceived performance - Learn web development
Learn › Performance › Perceived performance
largest contentful paint (lcp) metric, definited in the largest contentful paint api, reports the render time of the largest content element visible in the viewport.
...if some assets are going to be slower to load than others, with elements loading after other content has already been painted to the screen, plan ahead and leave space in the layout for them so that content doesn't jump or resize, especially after the site has become interactive.
... interactive elements are interactive make sure visible interactive elements are always interactive and responsive.
... if input elements are visible, the user should be able to interact with them without a lag.
Framework main features - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Main features
the following shows a simple jsx example: const subject = "world"; const header = ( <header> <h1>hello, {subject}!</h1> </header> ); this expression represents an html <header> element with a <h1> element inside.
... when used with react, the jsx from the previous snippet would be compiled into this: var subject = "world"; var header = react.createelement("header", null, react.createelement("h1", null, "hello, ", subject, "!") ); when ultimately rendered by the browser, the above snippet will produce html that looks like this: <header> <h1>hello, world!</h1> </header> handlebars the handlebars templating language is not specific to ember applications, but it is heavily utilized in ember apps.
...to render this component, we would write code like this in the place where we want it rendered (which will probably be inside another component): <authorcredit src="./assets/zelda.png" alt="portrait of zelda schiff" byline="zelda schiff is editor-in-chief of the library times." /> this will ultimately render the following <figure> element in the browser, with its structure as defined in the authorcredit component, and its content as defined in the props included on the authorcredit component call: <figure> <img src="assets/zelda.png" alt="portrait of zelda schiff" > <figcaption> zelda schiff is editor-in-chief of the library times.
... rendering elements just as with lifecycles, frameworks take different-but-similar approaches to how they render your applications.
Working with Svelte stores - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Svelte stores
the problem is elements that are dynamically added and removed from the page.
... a transition is applied with the transition:fn directive, and is triggered by an element entering or leaving the dom as a result of a state change.
...svelte also supports specifying different transitions to apply when the element is added or removed from the dom with the in:fn/out:fn directives, and it also allows you to define your custom css and javascript transitions.
... at the end we had a look at using the svelte transition directive to implement animations on dom elements.
Getting started with Vue - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Vue getting started
installation to use vue in an existing site, you can drop one of the following <script> elements onto a page.
...currently, this file initializes your vue application and signifies which html element in the index.html file your app should be attached to.
...open the app.vue file, and delete the <img> element from the template section: <img alt="vue logo" src="./assets/logo.png"> if your server is still running, you should see the logo removed from the rendered site almost instantly.
...we also need to remove the lines from inside the <script> element that import and register the component: delete these lines now: import helloworld from './components/helloworld.vue' components: { helloworld } your rendered app should no longer show an error, just a blank page, as we currently have no visible content inside <template>.
Mozilla accessibility architecture
Mozilla › Accessibility › Accessibility architecture
xul elements are checked for support of the nsiaccessibleprovider interface, which can return an accessible.
... html elements ask the node's primary frame for an accessible via nsiframe::getaccessible().
... nsouterdocaccessible: used for elements such as <iframe>, <browser> and <editor>, which spawn an entire new document, but don't actually have any child nodes in their own dom.
...we need to listen to some attribute changes because they might signal the need to invalidate parts of our cache; for example, if the name or href attribute on an anchor element changes, or the usemap attribute of an img changes.
A bird's-eye view of the Mozilla framework
Mozilla › Bird s Eye View of the Mozilla Framework
javascript client example suppose the javascript service in figure 2 is getlink() in help.js, which responds to the user clicking on a link in thecontents panel within thehelp viewer window by obtaining the link from thecontents panel elements stored in a dom tree.
... as a client, getlink() begins by obtaining the xulelement in the dom tree representing thecontents panel.
... var toctree = document.getelementbyid("help-toc-panel"); the document object is a xuldocument, and toctree is thecontents panel xulelement.
... using the database attribute of the xulelement, getlink() obtains an nsirdfcompositedatasource, which presents the individual datasources of the xulelement as a single rdf graph.
Chrome registration
Mozilla › Chrome Registration
chrome is the set of user interface elements of the application window that are outside the window's content area.
... toolbars, menu bars, progress bars, and window title bars are all examples of elements that are typically part of the chrome.
... contentaccessible chrome resources can no longer be referenced from within <img>, <script>, or other elements contained in, or added to, content that was loaded from an untrusted source.
... this restriction applies to both elements defined by the untrusted source and to elements added by trusted extensions.
Eclipse CDT
Mozilla › Developer guide › Eclipse › Eclipse CDT
for example, in content/svg/content/src/nssvgellipseelement.cpp eclipse shows a parse error due to ns_dom_interface_map_entry_classinfo not being defined.
... this define is in nsdomclassinfoid.h, which is included via the following include chain: content/svg/content/src/nssvgellipseelement.cpp content/svg/content/src/nssvgpathgeometryelement.h content/svg/content/src/nssvggraphicelement.h content/svg/content/src/nssvgstylableelement.h content/svg/content/src/nssvgelement.h content/base/src/nsgenericelement.h obj-debug/dist/include/nsdomclassinfoid.h in nsdomclassinfoid.h the ns_dom_interface_map_entry_classinfo define is behind an |ifdef _impl_ns_layout|.
... the properties for nssvgellipseelement.cpp show that this define was picked up by the build option discovery and set on nssvgellipseelement.cpp, but somehow it's not set for nsdomclassinfoid.h.
... however, if you right click on nsdomclassinfoid.h in the project explorer and select "index > create parser log file", the log shows "context" is set to "accessible/src/base/accevent.cpp", not "content/svg/content/src/nssvgellipseelement.cpp", and if you check the properties for accevent.cpp, indeed it is not built with the _impl_ns_layout define.
SVG Guidelines
Mozilla › Developer guide › SVG Guidelines
you should avoid line breaks between every single element or within attribute values.
... unused attributes on root <svg> element the root <svg> element can also host many useless attributes.
... here's an example taking into account the list below: version x="0" and y="0" enable-background (unsupported by gecko and now deprecated by the filter effects specification) id (id on root element has no effect) xmlns:xlink attribute when there are no xlink:href attributes used throughout the file other unused xml namespace definitions xml:space when there is no text used in the file other empty tags, this may be obvious, but those are sometimes found in svgs unreferenced ids (usually on gradient stops, but also on shapes or paths) clip-rule attribute when the element is not a descendant of a <clippath> fill-rule attribute when the element is a descendant of a <clippath> unreferenced/unused clip paths, masks or defs (example) styling basics privilege short lowercase hex f...
...here are some commonly seen examples: style="display: none;" on <defs> elements (a <defs> element is hidden by default) type="text/css" on <style> elements stroke: none or stroke-width: 0 svg grouping style grouping group similarly styled shapes under one <g> tag; this avoids having to set the same class/styles on many shapes.
Localization Use Cases
Mozilla › Projects › L20n › Localization Use Cases
first, there is devicestoragehelper.showformatedsize (sic): function showformatedsize(element, l10nid, size) { if (size === undefined || isnan(size)) { element.textcontent = ''; return; } // kb - 3 kb (nearest ones), mb, gb - 1.2 mb (nearest tenth) var fixeddigits = (size < 1024 * 1024) ?
... 0 : 1; var sizeinfo = filesizeformatter.getreadablefilesize(size, fixeddigits); var _ = navigator.mozl10n.get; element.textcontent = _(l10nid, { size: sizeinfo.size, unit: _('byteunit-' + sizeinfo.unit) }); } the function is used like so: // application storage updateappfreespace: function storage_updateappfreespace() { var self = this; this.getfreespace(this.appstorage, function(freespace) { devicestoragehelper.showformatedsize(self.appstoragedesc, 'availablesize', freespace); }); }, problem definition for all values of freespace, the following string is enough to construct a grammatically-correct sentence in english: availablesize = {{$size}} {{$unit}} available however, other languages might need to pluralize this string with different forms of the av...
... you'll notice that devicestoragehelper.showformatedsize passes a localized name of the unit to availablesize: function showformatedsize(element, l10nid, size) { // … var _ = navigator.mozl10n.get; element.textcontent = _(l10nid, { size: sizeinfo.size, unit: _('byteunit-' + sizeinfo.unit) }); } problem definition even though there's no need to localize the units in english at all, we still need to do it, because in other languages we might need to use localized names.
... in the javascript code, the developer needs to pass sizeinfo.unit instead of a localized value: function showformatedsize(element, l10nid, size) { // … element.textcontent = document.l10n.get(l10nid, { size: sizeinfo.size, unit: sizeinfo.unit }); } and then use the $unit variable verbatim in the english message: <availablesize "{{ $size }} {{ $unit }} available"> in french, the localizer can then use the value of $unit to match it against a translated abbreviation, like so: <_unitedemesure { b: "o", ...
AsyncTestUtils extended framework
Mozilla › Projects › MailNews › AsyncTestUtils Extended Framework
to: (automatically generated single recipient) a list of recipients, where each recipient is a list whose first element is a (display) name and second element is an email address.
... from: (automatically generated) a list whose first element is a (display) name and second element is an email address.
... folderswithmsghdrs [getter] return a list where each element is a list with two sub-elements.
... folderswithxpcomhdrarrays [getter] same as folderswithmsghdrs but the second element in each sub-list is an nsimutablearray instead of a js list.
PR_INSERT_AFTER
Mozilla › Projects › NSPR › Reference › PR INSERT AFTER
inserts an element after another element in a circular list.
... syntax #include <prclist.h> pr_insert_after ( prclist *elemp1 prclist *elemp2); parameters elemp1 a pointer to the element to be inserted.
... elemp2 a pointer to the element after which elemp1 is to be inserted.
... description pr_insert_after inserts the element specified by elemp1 into the circular list, after the element specified by elemp2.
PR_INSERT_BEFORE
Mozilla › Projects › NSPR › Reference › PR INSERT BEFORE
inserts an element before another element in a circular list.
... syntax #include <prclist.h> pr_insert_before ( prclist *elemp1 prclist *elemp2); parameters elemp1 a pointer to the element to be inserted.
... elemp2 a pointer to the element before which elemp1 is to be inserted.
... description pr_insert_before inserts the element specified by elemp1 into the circular list, before the element specified by elemp2.
JSAPI User Guide
Mozilla › Projects › SpiderMonkey › JSAPI User Guide
the spidermonkey universe in order to run any javascript code in spidermonkey, an application must have three key elements: a jsruntime, a jscontext, and a global object.
... a minimal example each of the three key elements described in the previous section requires a few jsapi calls: the runtime: use js_newruntime to create it and js_destroyruntime to clean it up when you're done.
... if you just need the value to remain reachable for the duration of a jsnative call, store it in *rval or an element of the argv array.
....; break; } } return true; } defining classes this pulls together the above api elements by defining a constructor function, a prototype object, and properties of the prototype and of the constructor, all with one api call.
JS_InitClass
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS InitClass
ps jspropertyspec * either null or a pointer to the first element of an array of jspropertyspecs, terminated by the null jspropertyspec, which can be written {0, 0, 0, 0, 0}.
... fs jsfunctionspec * either null or a pointer to the first element of an array of jsfunctionspecs, terminated by js_fs_end.
...(this is the javascript equivalent of public, non-static methods in c++ or java.) static_ps jspropertyspec * either null or a pointer to the first element of an array of jspropertyspecs, terminated by the null jspropertyspec.
...(this is the nearest javascript equivalent of public static member variables in c++ or public static fields in java.) static_fs jsfunctionspec * either null or a pointer to the first element of an array of jsfunctionspecs, terminated by js_fs_end.
nsIComponentRegistrar
Mozilla › Tech › XPCOM › Reference › Interface › nsIComponentRegistrar
elements of the enumeration can be queryinterfaced for the nsisupportsid interface.
...elements of the enumerator implement nsisupportsid.
...elements of the enumeration can be queryinterfaced for the nsisupportscstring interface.
...elements of the enumerator implement nsisupportscstring.
nsIDOMChromeWindow
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMChromeWindow
inherits from: nsisupports last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) method overview void beginwindowmove(in nsidomevent mousedownevent); void getattention(); void getattentionwithcyclecount(in long acyclecount); void maximize(); void minimize(); void notifydefaultbuttonloaded(in nsidomelement defaultbutton); void restore(); void setcursor(in domstring cursor); attributes attribute type description browserdomwindow nsibrowserdomwindow the related nsibrowserdomwindow instance which provides access to yet another layer of utility functions by chrome script.
...this method is called automatically on dialog element or wizard element of xul.
... if some xul applications create a dialog like window which has a default button but it's not created by the dialog/wizard element, the applications should call this method for the accessibility and the usability on windows at onload event.
... void notifydefaultbuttonloaded( in nsidomelement defaultbutton ); parameters defaultbutton the default button element of the window.
nsIDOMNSHTMLDocument
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMNSHTMLDocument
embeds nsidomhtmlcollection equivalent to getelementsbytagname("embed") read only.
... fgcolor domstring same as body.text head nsidomhtmlheadelement returns the first child element of the html element that is a head element, or null if there is no html or head element.
... height long the height of the body element.
... vlinkcolor domstring same as body.vlink width long the width of the body element.
nsIDragService
Mozilla › Tech › XPCOM › Reference › Interface › nsIDragService
if aimage is null, aimagex and aimagey are not used and the image is instead determined from the source node adomnode, and the offset calculated so that the initial location for the image appears in the same screen position as where the element is located.
...if this is an html <image> or <canvas> element, the drag image is taken from the image data.
... if the element is in a document, it will be rendered at its displayed size, otherwise, it will be rendered at its real size.
... for other types of elements, the element is rendered into an offscreen buffer in the same manner as it is currently displayed.
nsIEditor
Mozilla › Tech › XPCOM › Reference › Interface › nsIEditor
66 introduced gecko 1.0 inherits from: nsisupports last changed in gecko 18.0 (firefox 18.0 / thunderbird 18.0 / seamonkey 2.15) method overview [noscript] void init(in nsidomdocument doc, in nsicontent aroot, in nsiselectioncontroller aselcon, in unsigned long aflags); void setattributeorequivalent(in nsidomelement element, in astring sourceattrname, in astring sourceattrvalue, in boolean asuppresstransaction); void removeattributeorequivalent(in nsidomelement element, in domstring sourceattrname, in boolean asuppresstransaction); void postcreate(); void predestroy(in boolean adestroyingframes); selected content removal void deleteselection(in short action, in ...
...anpaste(in long aselectiontype); selection methods void selectall(); void beginningofdocument(); void endofdocument(); drag/drop methods boolean candrag(in nsidomevent aevent); void dodrag(in nsidomevent aevent); void insertfromdrop(in nsidomevent aevent); node manipulation methods void setattribute(in nsidomelement aelement, in astring attributestr,in astring attvalue); boolean getattributevalue(in nsidomelement aelement, in astring attributestr, out astring resultvalue); void removeattribute(in nsidomelement aelement, in astring aattribute); void cloneattribute(in astring aattribute, in nsidomnode asourcenode); void cloneattributes(in nsidomnode destnode, in nsidomnode s...
... rootelement nsidomelement read only.
... the root editable element, which for a document is its body.
nsISyncMessageSender
Mozilla › Tech › XPCOM › Reference › Interface › nsISyncMessageSender
principal nsiprincipal returns array: an array of structured clones of the objects returned by all the listeners to this message, one element for each listener.
... if there was only one listener, it is an array with a single element.
... principal nsiprincipal returns array: an array of structured clones of the objects returned by all the listeners to this message, one element for each listener.
... if there was only one listener, it is an array with a single element.
nsITreeContentView
Mozilla › Tech › XPCOM › Reference › Interface › nsITreeContentView
last changed in gecko 1.8.0 inherits from: nsisupports method overview long getindexofitem(in nsidomelement item); nsidomelement getitematindex(in long index); attributes attribute type description root nsidomelement the element in the dom which this view uses as root content.
...long getindexofitem( in nsidomelement item ); parameters item a tree row for which to find the row index.
...nsidomelement getitematindex( in long index ); parameters index the row index for which to get the item return value the nsidomelement item.
... remarks the nsitreecontentview interface only applies to trees with dom element children, and does not apply to trees with flags="dontbuildcontent".
nsIUpdate
Mozilla › Tech › XPCOM › Reference › Interface › nsIUpdate
1.0 66 introduced gecko 1.8 inherits from: nsisupports last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) method overview nsiupdatepatch getpatchat(in unsigned long index); nsidomelement serialize(in nsidomdocument updates); attributes attribute type description appversion astring the application version of this update.
...serialize() serializes the update object into a dom element.
... nsidomelement serialize( in nsidomdocument updates ); parameters updates the dom document into which to serialize the update.
... return value the patch object serialized into an nsidomelement.
nsIUpdatePatch
Mozilla › Tech › XPCOM › Reference › Interface › nsIUpdatePatch
1.0 66 introduced gecko 1.8 inherits from: nsisupports last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) method overview nsidomelement serialize(in nsidomdocument updates); attributes attribute type description finalurl astring the final url this patch was being downloaded from.
... methods serialize() serializes the patch object into a dom element.
... nsidomelement serialize( in nsidomdocument updates ); parameters updates the dom document into which to serialize the patch.
... return value the patch object serialized into an nsidomelement.
nsIWebBrowserChromeFocus
Mozilla › Tech › XPCOM › Reference › Interface › nsIWebBrowserChromeFocus
inherits from: nsisupports last changed in gecko 1.7 method overview void focusnextelement(); void focusprevelement(); methods focusnextelement() set the focus at the next focusable element in the chrome.
... void focusnextelement(); parameters none.
... focusprevelement() set the focus at the previous focusable element in the chrome.
... void focusprevelement(); parameters none.
nsIXULTemplateQueryProcessor
Mozilla › Tech › XPCOM › Reference › Interface › nsIXULTemplateQueryProcessor
a template query is the contents inside a <query> element within the template.
...the reference variable may be specified in a template by setting the "container" attribute on the <template> element to the variable to use.
... the member variable may be specified in a similar way using the "member" attribute, or it may be specified in the first <action> body in the template as the value of a uri attribute on an element.
... a breadth-first search of the first action is performed to find this element.
Index
Mozilla › Thunderbird › Index
we add widgets by inserting new xul dom elements into the application window and modify them using scripts and attaching event handlers.
... while xul provides the elements of the user interface, actions are written in javascript.
...an alternative to these methods is to directly access the element by it's id as in the detect when a folder opens example.
... 111 working with the folder pane add-ons, extensions, thunderbird the "folder pane" refers to the main navigation element that appears on the left side of the main thunderbird window.
Add to iPhoto
Mozilla › js-ctypes › Examples › Add to iPhoto
a pointer to an lsapplicationparameters structure that describes what application to launch a pointer to the first element of an array to receive the serial numbers of the launched applications; we're not using this field, but if you do, you'll probably have to declare this differently.
... if (document.getelementbyid("contentareacontextmenu")) { document.getelementbyid("contentareacontextmenu").addeventlistener("popupshowing", iphoto.onpopup, false); } responding when the context menu is clicked when the user right-clicks an image, our handler gets called: onpopup: function() { var node = iphoto.getcurrentnode(); var item = document.getelementbyid("add-to-iphoto_menuitem"); if (item) { i...
... otherwise, we fetch the name of the element and look to see if it's an <img> element.
...null, null, null); var appstr = "file:///applications/iphoto.app"; var appstrcf = corefoundation.cfstringcreatewithcharacters(null, appstr, appstr.length); var appurl = corefoundation.cfurlcreatewithstring(null, appstrcf, null); corefoundation.cfrelease(appstrcf); var b = corefoundation.cfurlgetfsref(appurl, ref.address()); if (!b) { var stringsbundle = document.getelementbyid("string-bundle"); alert(stringsbundle.getstring('alert_download_error_string')); } else { var array = ctypes.cast(mutablearray, corefoundation.cfarrayref); appservices.lsopenurlswithrole(array, 0, null, appparams.address(), null, 0); } corefoundation.cfrelease(appurl); // clean up corefoundation.cfrelease(array); } appservices.shutdown(); carbon...
Declaring types
Mozilla › js-ctypes › Using js-ctypes › Declaring types
in order to accomplish this you can either set the type of next to ctypes.voidptr_t, or to be more accurate, use the define technique: var struct = ctypes.structtype('struct'); struct.define([{ next: struct.ptr }]); arrays to declare a new array type, you use the ctypes.arraytype() method.when declaring a new array type, you provide a ctype indicating the type of each element in the array as well as an optional array length.
... you may declare your array either with a specific number of elements, or with no predetermined size.
... declaring an array type with unspecified length to declare a new array type without specifying a length, you simply pass in the ctype specifying the element type when calling ctypes.arraytype().
... declaring an array type with a specific length declaring an array type that specifies the array length is as simple as adding a length when calling ctypes.arraytype(), like this: const filearray = new ctypes.arraytype(file, 20); this declares filearray as an array type that can hold 20 elements.
Plug-in Development Overview - Plugins
Plugins › Guide › Plug-in Development Overview
for information about the html elements to use, see using html to display plug-ins.
...the data can come from either an object element in an html file (where the object or embed element either specifies the mime type directly or references a file of that type), from a separate non-html file of that mime type, or from the server.
... making plug-ins scriptable scriptable plug-ins are plug-ins that have been extended to provide methods that can be called from javascript and the dom when accessed through the object or embed element.
... consider the following example, where a media player plug-in can be controlled with an advancetonextsong() method called inside the script element: <object id="myplugin" type="audio/wav" data="music.wav"> </object> <script type="application/javascript"> var theplugin = document.getelementbyid('myplugin'); if (theplugin && theplugin.advancetonextsong) theplugin.advancetonextsong(); else alert("plugin not installed correctly"); </script> in the past, liveconnect and later xpconnect were used to make plug-ins scriptable.
Scripting plugins - Plugins
Plugins › Guide › Scripting plugins
« previousnext » xxx: dummy p element this document describes the new cross-browser npapi extensions, commonly called npruntime, that have been developed by a group of browser and plugin vendors, including the mozilla foundation, adobe, apple, opera, and sun microsystems (see press release).
...echanism needs to return the appropriate npobject (which is created by calling npn_createobject) when the browser requests it by calling: npp_getvalue(npp, nppvpluginscriptablenpobject, ...); accessing browser objects from a plugin a plugin that wishes to access objects in the browser window that loaded the plugin can do this by getting the npobject for the browser's window object, or the dom element that loaded the plugin.
...the extensions are two additions to the npnvariables enumeration; the new enumerations are npnvwindownpobject and npnvpluginelementnpobject.
... the new npnvariable enumerations are defined in npapi.h as: npnvwindownpobject = 15, npnvpluginelementnpobject = 16 how to call plugin native methods the following html code will do the job: <embed type="application/plugin-mimetype"> <script> var embed = document.embeds[0]; embed.nativemethod(); alert(embed.nativeproperty); embed.nativeproperty.anothernativemethod(); </script> the api extensions the api extensions are based on four new structs: npstring npvariant npn_relea...
Debugger.Object - Firefox Developer Tools
Tools › Debugger-API › Debugger.Object
for example, in firefox, code in privileged compartments sees content dom element objects without redefinitions or extensions made to that object’s properties by content code.
... (in firefox terminology, privileged code sees the element through an “xray wrapper”.) to ensure that debugger code sees each object just as the debuggee would, each debugger.object instance presents its referent as it would be seen from a particular compartment.
... if the referent is a host function for which parameter names are not available, return an array with one element per parameter, each of which is undefined.
... if the referent uses destructuring parameters, then the array’s elements reflect the structure of the parameters.
Debugger.Object - Firefox Developer Tools
Tools › Debugger.Object
for example, in firefox, code in privileged compartments sees content dom element objects without redefinitions or extensions made to that object's properties by content code.
... (in firefox terminology, privileged code sees the element through an "xray wrapper".) to ensure that debugger code sees each object just as the debuggee would, each debugger.object instance presents its referent as it would be seen from a particular compartment.
... if the referent is a host function for which parameter names are not available, return an array with one element per parameter, each of which is undefined.
... if the referent uses destructuring parameters, then the array's elements reflect the structure of the parameters.
All keyboard shortcuts - Firefox Developer Tools
Tools › Keyboard shortcuts
lbox is in a separate window and not in foreground) ctrl + shift + i or f12 cmd + opt + i or f12 ctrl + shift + i or f12 close toolbox (if the toolbox is in a separate window and in foreground) ctrl + shift + i or f12 cmd + opt + i or f12 ctrl + shift + i or f12 open web console 1 ctrl + shift + k cmd + opt + k ctrl + shift + k toggle "pick an element from the page" (opens the toolbox and/or focus the inspector tab) ctrl + shift + c cmd + opt + c ctrl + shift + c open style editor shift + f7 shift + f7 * shift + f7 open profiler shift + f5 shift + f5 * shift + f5 open network monitor 2 ctrl + shift + e cmd + opt + e ctrl + shift + e toggle responsive design mode ctrl + ...
... / ctrl + y indent tab tab tab unindent shift + tab shift + tab shift + tab move line(s) up alt + up alt + up alt + up move line(s) down alt + down alt + down alt + down comment/uncomment line(s) ctrl + / cmd + / ctrl + / page inspector command windows macos linux inspect element ctrl + shift + c cmd + shift + c ctrl + shift + c node picker these shortcuts work while the node picker is active.
... command windows macos linux select the element under the mouse and cancel picker mode click click click select the element under the mouse and stay in picker mode shift+click shift+click shift+click html pane these shortcuts work while you're in the inspector's html pane.
... command windows macos linux move to the previous element in the breadcrumbs bar left arrow left arrow left arrow move to the next element in the breadcrumbs bar right arrow right arrow right arrow focus the html pane shift + tab shift + tab shift + tab focus the css pane tab tab tab css pane these shortcuts work when you're in the inspector's css pane.
Taking screenshots - Firefox Developer Tools
Tools › Taking screenshots
you can use the developer tools to take a screenshot of the entire page, or of a single element in the page.
...the screenshot is saved to your browser's "downloads" directory: taking a screenshot of an element to take a screenshot of a single element in the page, activate the context menu on that element in the inspector's html pane, and select "screenshot node".
... --selector string a css selector that selects a single element on the page.
... when supplied, only this element and its descendants will be included in the screenshot.
AnalyserNode.getByteFrequencyData() - Web APIs
Web › API › AnalyserNode › getByteFrequencyData
if the array has fewer elements than the analysernode.frequencybincount, excess elements are dropped.
... if it has more elements than needed, excess elements are ignored.
... if the array has fewer elements than the analysernode.frequencybincount, excess elements are dropped.
... if it has more elements than needed, excess elements are ignored.
AnalyserNode.getByteTimeDomainData() - Web APIs
Web › API › AnalyserNode › getByteTimeDomainData
if the array has fewer elements than the analysernode.fftsize, excess elements are dropped.
... if it has more elements than needed, excess elements are ignored.
... if the array has fewer elements than the analysernode.fftsize, excess elements are dropped.
... if it has more elements than needed, excess elements are ignored.
AnalyserNode.getFloatTimeDomainData() - Web APIs
Web › API › AnalyserNode › getFloatTimeDomainData
if the array has fewer elements than the analysernode.fftsize, excess elements are dropped.
... if it has more elements than needed, excess elements are ignored.
... if the array has fewer elements than the analysernode.frequencybincount, excess elements are dropped.
... if it has more elements than needed, excess elements are ignored.
Animation - Web APIs
Web › API › Animation
animation.commitstyles() commits the end styling state of an animation to the element being animated, even after that animation has been removed.
... it will cause the end styling state to be written to the element being animated, in the form of properties inside a style attribute.
... automatically removing filling animations it is possible to trigger a large number of animations on the same element.
...the related javascript features are: animation.commitstyles() for commiting the end styling state of an animation to the element being animated, even after that animation has been removed.
BaseAudioContext.createStereoPanner() - Web APIs
Web › API › BaseAudioContext › createStereoPanner
example in our stereopannernode example (see source code) html we have a simple <audio> element along with a slider <input> to increase and decrease pan value.
... in the javascript we create a mediaelementaudiosourcenode and a stereopannernode, and connect the two together using the connect() method.
... var audioctx = new (window.audiocontext || window.webkitaudiocontext)(); var myaudio = document.queryselector('audio'); var pancontrol = document.queryselector('.panning-control'); var panvalue = document.queryselector('.panning-value'); pre.innerhtml = myscript.innerhtml; // create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a stereo panner var pannode = audioctx.createstereopanner(); // event handler function to increase panning to the right and left // when the slider is moved pancontrol.oninput = function() { pannode.pan.setvalueattime(pancontrol.value, audioctx.currenttime); panvalue.inner...
...html = pancontrol.value; } // connect the mediaelementaudiosourcenode to the pannode // and the pannode to the destination, so we can play the // music and adjust the panning using the controls source.connect(pannode); pannode.connect(audioctx.destination); specifications specification status comment web audio apithe definition of 'createstereopanner()' in that specification.
CanvasCaptureMediaStreamTrack.canvas - Web APIs
Web › API › CanvasCaptureMediaStreamTrack › canvas
the canvascapturemediastreamtrack canvas read-only property returns the htmlcanvaselement from which frames are being captured.
... syntax var elt = stream.canvas; value an htmlcanvaselement indicating the canvas which is the source of the frames being captured.
... example // find the canvas element to capture var canvaselt = document.getelementsbytagname("canvas")[0]; // get the stream var stream = canvaselt.capturestream(25); // 25 fps // do things to the stream ...
... // obtain the canvas associated with the stream var canvas = stream.canvas; specifications specification status comment media capture from dom elementsthe definition of 'canvascapturemediastreamtrack.canvas' in that specification.
CanvasRenderingContext2D.arcTo() - Web APIs
Web › API › CanvasRenderingContext2D › arcTo
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // tangential lines ctx.beginpath(); ctx.strokestyle = 'gray'; ctx.moveto(200, 20); ctx.lineto(200, 130); ctx.lineto(50, 20); ctx.stroke(); // arc ctx.beginpath(); ctx.strokestyle = 'black'; ctx.linewidth = 5; ctx.moveto(200, 20); ctx.arcto(200,130, 50,20, 40); ctx.stroke(); // start point ctx.beginpath(); ctx.fillstyle = 'blue'; ctx.arc(200,...
... const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const p0 = { x: 230, y: 20 } const p1 = { x: 90, y: 130 } const p2 = { x: 20, y: 20 } const labelpoint = function (p) { const offset = 15; ctx.filltext('(' + p.x + ',' + p.y + ')', p.x + offset, p.y + offset); } ctx.beginpath(); ctx.moveto(p0.x, p0.y); ctx.arcto(p1.x, p1.y, p2.x, p2.y, 50); ctx.lineto(p2.x, p2.y); labelpoint(p0); lab...
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.beginpath(); ctx.moveto(180, 90); ctx.arcto(180,130, 110,130, 130); ctx.lineto(110, 130); ctx.stroke(); result live demo more sophisticated demo of the method.
... html <div> <label for="radius">radius: </label> <input name="radius" type="range" id="radius" min=0 max=100 value=50> <label for="radius" id="radius-output">50</label> </div> <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const controlout = document.getelementbyid('radius-output'); const control = document.getelementbyid('radius'); control.oninput = () => { controlout.textcontent = r = control.value; }; const mouse = { x: 0, y: 0 }; let r = 100; // radius const p0 = { x: 0, y: 50 }; const p1 = { x: 100, y: 100 }; const p2 = { x: 150, y: 50 }; const p3 = { x: 200, y: 100 }; const labelpoint = function (p, off...
CanvasRenderingContext2D.canvas - Web APIs
Web › API › CanvasRenderingContext2D › canvas
the canvasrenderingcontext2d.canvas property, part of the canvas api, is a read-only reference to the htmlcanvaselement object that is associated with a given context.
... it might be null if there is no associated <canvas> element.
... syntax ctx.canvas; examples given this <canvas> element: <canvas id="canvas"></canvas> ...
... you can get a reference to the canvas element within the canvasrenderingcontext2d by using the canvas property: var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); ctx.canvas // htmlcanvaselement specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.canvas' in that specification.
CanvasRenderingContext2D.drawFocusIfNeeded() - Web APIs
Web › API › CanvasRenderingContext2D › drawFocusIfNeeded
the canvasrenderingcontext2d.drawfocusifneeded() method of the canvas 2d api draws a focus ring around the current or given path, if the specified element is focused.
... syntax void ctx.drawfocusifneeded(element); void ctx.drawfocusifneeded(path, element); parameters element the element to check whether it is focused or not.
... html <canvas id="canvas"> <button id="button1">continue</button> <button id="button2">quit</button> </canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const button1 = document.getelementbyid('button1'); const button2 = document.getelementbyid('button2'); document.addeventlistener('focus', redraw, true); document.addeventlistener('blur', redraw, true); canvas.addeventlistener('click', handleclick, false); redraw(); function redraw() { ctx.clearrect(0, 0, canvas.width, canvas.height); drawbutton(button1, 20, 20); drawbutton(button2, 20, 80); ...
...const x = e.clientx - canvas.offsetleft; const y = e.clienty - canvas.offsettop; // focus button1, if appropriate drawbutton(button1, 20, 20); if (ctx.ispointinpath(x, y)) { button1.focus(); } // focus button2, if appropriate drawbutton(button2, 20, 80); if (ctx.ispointinpath(x, y)) { button2.focus(); } } function drawbutton(el, x, y) { const active = document.activeelement === el; const width = 150; const height = 40; // button background ctx.fillstyle = active ?
Drawing text - Web APIs
Web › API › Canvas API › Tutorial › Drawing text
function draw() { var ctx = document.getelementbyid('canvas').getcontext('2d'); ctx.font = '48px serif'; ctx.filltext('hello world', 10, 50); } <canvas id="canvas" width="300" height="100"></canvas> draw(); a stroketext example the text is filled using the current strokestyle.
... function draw() { var ctx = document.getelementbyid('canvas').getcontext('2d'); ctx.font = '48px serif'; ctx.stroketext('hello world', 10, 50); } <canvas id="canvas" width="300" height="100"></canvas> draw(); styling text in the examples above we are already making use of the font property to make the text a bit larger than the default size.
...e code <canvas id="canvas" width="400" height="200" class="playable-canvas"></canvas> <div class="playable-buttons"> <input id="edit" type="button" value="edit" /> <input id="reset" type="button" value="reset" /> </div> <textarea id="code" class="playable-code"> ctx.font = "48px serif"; ctx.textbaseline = "hanging"; ctx.stroketext("hello world", 0, 100);</textarea> var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); var textarea = document.getelementbyid('code'); var reset = document.getelementbyid('reset'); var edit = document.getelementbyid('edit'); var code = textarea.value; function drawcanvas() { ctx.clearrect(0, 0, canvas.width, canvas.height); eval(textarea.value); } reset.addeventlistener('click', function() { textarea.value = code; drawcanv...
... function draw() { var ctx = document.getelementbyid('canvas').getcontext('2d'); var text = ctx.measuretext('foo'); // textmetrics object text.width; // 16; } gecko-specific notes in gecko (the rendering engine of firefox, firefox os and other mozilla based applications), some prefixed apis were implemented in earlier versions to draw text on a canvas.
Canvas tutorial - Web APIs
Web › API › Canvas API › Tutorial
<canvas> is an html element which can be used to draw graphics via scripting (usually javascript).
... this tutorial describes how to use the <canvas> element to draw 2d graphics, starting with the basics.
... before you start using the <canvas> element is not very difficult, but you do need a basic understanding of html and javascript.
... the <canvas> element is not supported in some older browsers, but is supported in recent versions of all major browsers.
ChildNode.after() - Web APIs
Web › API › ChildNode › after
examples inserting an element var parent = document.createelement("div"); var child = document.createelement("p"); parent.appendchild(child); var span = document.createelement("span"); child.after(span); console.log(parent.outerhtml); // "<div><p></p><span></span></div>" inserting text var parent = document.createelement("div"); var child = document.createelement("p"); parent.appendchild(child); child.after("text"); c...
...onsole.log(parent.outerhtml); // "<div><p></p>text</div>" inserting an element and text var parent = document.createelement("div"); var child = document.createelement("p"); parent.appendchild(child); var span = document.createelement("span"); child.after(span, "text"); console.log(parent.outerhtml); // "<div><p></p><span></span>text</div>" childnode.after() is unscopable the after() method is not scoped into the with statement.
...argitem : document.createtextnode(string(argitem))); }); this.parentnode.insertbefore(docfrag, this.nextsibling); } }); }); })([element.prototype, characterdata.prototype, documenttype.prototype]); another polyfill // from: https://github.com/fabiovergani/js-polyfill_element.prototype.after/blob/master/after.js (function(x){ var o=x.prototype,p='after'; if(!o[p]){ o[p]=function(){ var e, m=arguments, l=m.length, i=0, t=this, p=t.parentnode, n=node, s=string, d=document; if(p!==null){ while(i<l){ ...
... e=m[i]; if(e instanceof n){ t=t.nextsibling; if(t!==null){ p.insertbefore(e,t); }else{ p.appendchild(e); }; }else{ p.appendchild(d.createtextnode(s(e))); }; ++i; }; }; }; }; })(element); /* minified: (function(x){ var o=x.prototype; o.after||(o.after=function(){var e,m=arguments,l=m.length,i=0,t=this,p=t.parentnode,n=node,s=string,d=document;if(p!==null){while(i<l){((e=m[i]) instanceof n)?(((t=t.nextsibling )!==null)?p.insertbefore(e,t):p.appendchild(e)):p.appendchild(d.createtextnode(s(e)));++i;}}}); }(element)); */ specification specification status comment domthe definition of 'childnode.after()' in that specificati...
DataTransfer.clearData() - Web APIs
Web › API › DataTransfer › clearData
html <span class="tweaked" id="source" draggable="true"> select this element, drag it to the drop zone and then release the selection to move the element.
...op zone</span> <div>status: <span id="status">drag to start</span></div> <div>data is: <span id="data">uninitialized</span></div> css span.tweaked { display: inline-block; margin: 1em 0; padding: 1em 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; } javascript window.addeventlistener('domcontentloaded', function () { // select html elements var draggable = document.getelementbyid('source'); var dropable = document.getelementbyid('target'); var status = document.getelementbyid('status'); var data = document.getelementbyid('data'); var dropped = false; // register event handlers draggable.addeventlistener('dragstart', dragstarthandler); draggable.addeventlistener('dragend', dragendhandler); dropable.addeventlistene...
...r('dragover', dragoverhandler); dropable.addeventlistener('dragleave', dragleavehandler); dropable.addeventlistener('drop', drophandler); function dragstarthandler (event) { status.innerhtml = 'drag in process'; // change target element's border to signify drag has started event.currenttarget.style.border = '1px dashed blue'; // start by clearing existing clipboards; this will affect all types since we // don't give a specific type.
...event.preventdefault(); } function dragleavehandler (event) { status.innerhtml = 'drag in process (drop was available)'; event.preventdefault(); } function drophandler (event) { dropped = true; status.innerhtml = 'drop done'; event.preventdefault(); // get data linked to event format « text » var _data = event.datatransfer.getdata('text/plain'); var element = document.getelementbyid(_data); // append drag source element to event's target element event.target.appendchild(element); // change css styles and displayed text element.style.csstext = 'border: 1px solid black;display: block; color: red'; element.innerhtml = "i'm in the drop zone!"; } }) specifications specification status comment html livi...
DataTransfer.dropEffect - Web APIs
Web › API › DataTransfer › dropEffect
for example, when the user hovers over a target drop element, the browser's cursor may indicate which type of operation will occur.
... html content <div> <p id="source" ondragstart="dragstart_handler(event);" draggable="true"> select this element, drag it to the drop zone and then release the selection to move the element.
...ndragover="dragover_handler(event);">drop zone</div> css content div { margin: 0em; padding: 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; } javascript content function dragstart_handler(ev) { console.log("dragstart: dropeffect = " + ev.datatransfer.dropeffect + " ; effectallowed = " + ev.datatransfer.effectallowed); // add this element's id to the drag payload so the drop handler will // know which element to add to its tree ev.datatransfer.setdata("text", ev.target.id); ev.datatransfer.effectallowed = "move"; } function drop_handler(ev) { console.log("drop: dropeffect = " + ev.datatransfer.dropeffect + " ; effectallowed = " + ev.datatransfer.effectallowed); ev.preventdefault(); // get the id of the target and add...
... the moved element to the target's dom var data = ev.datatransfer.getdata("text"); ev.target.appendchild(document.getelementbyid(data)); } function dragover_handler(ev) { console.log("dragover: dropeffect = " + ev.datatransfer.dropeffect + " ; effectallowed = " + ev.datatransfer.effectallowed); ev.preventdefault(); // set the dropeffect to move ev.datatransfer.dropeffect = "move" } specifications specification status comment html living standardthe definition of 'dropeffect' in that specification.
Document.body - Web APIs
Web › API › Document › body
the document.body property represents the <body> or <frameset> node of the current document, or null if no such element exists.
... syntax const objref = document.body document.body = objref example // given this html: <body id="oldbodyelement"></body> alert(document.body.id); // "oldbodyelement" const anewbodyelement = document.createelement("body"); anewbodyelement.id = "newbodyelement"; document.body = anewbodyelement; alert(document.body.id); // "newbodyelement" notes document.body is the element that contains the content for the document.
... in documents with <body> contents, returns the <body> element, and in frameset documents, this returns the outermost <frameset> element.
... though the body property is settable, setting a new body on a document will effectively remove all the current children of the existing <body> element.
Document.createTreeWalker() - Web APIs
Web › API › Document › createTreeWalker
typically this will be an element owned by the document.
... nodefilter.show_element 1 shows element nodes.
... example the following example goes through all nodes in the body, reduces the set of nodes to elements, simply passes through as acceptable each node (it could reduce the set in the acceptnode() method instead), and then makes use of tree walker iterator that is created to advance through the nodes (now all elements) and push them into an array.
... var treewalker = document.createtreewalker( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); var nodelist = []; var currentnode = treewalker.currentnode; while(currentnode) { nodelist.push(currentnode); currentnode = treewalker.nextnode(); } specifications specification status comment domthe definition of 'document.createtreewalker' in that specification.
Document.fullscreenEnabled - Web APIs
Web › API › Document › fullscreenEnabled
full-screen mode is available only for a page that has no windowed plug-ins in any of its documents, and if all <iframe> elements which contain the document have their allowfullscreen attribute set.
... syntax var isfullscreenavailable = document.fullscreenenabled; value a boolean value which is true if the document and the elements within can be placed into full-screen mode by calling element.requestfullscreen().
... example in this example, before attempting to request full-screen mode for a <video> element, the value of fullscreenenabled is checked, in order to avoid making the attempt when not available.
... function requestfullscreen() { if (document.fullscreenenabled) { videoelement.requestfullscreen(); } else { console.log('your browser cannot use fullscreen right now'); } } specifications specification status comment fullscreen apithe definition of 'document.fullscreenenabled' in that specification.
Document: fullscreenchange event - Web APIs
Web › API › Document › fullscreenchange event
bubbles yes cancelable no interface event event handler property onfullscreenchange the event is sent to the element that is transitioning into or out of full-screen mode, and this event then bubbles up to the document.
... to find out whether the element is entering or exiting full-screen mode, check the value of documentorshadowroot.fullscreenelement: if this value is null then the element is exiting full-screen mode, otherwise it is entering full-screen mode.
... document.addeventlistener('fullscreenchange', (event) => { // document.fullscreenelement will point to the element that // is in fullscreen mode if there is one.
... if (document.fullscreenelement) { console.log(`element: ${document.fullscreenelement.id} entered full-screen mode.`); } else { console.log('leaving full-screen mode.'); } }); see element: fullscreenchange event for another example.
Document.releaseCapture() - Web APIs
Web › API › Document › releaseCapture
the releasecapture() method releases mouse capture if it's currently enabled on an element within this document.
... enabling mouse capture on an element is done by calling element.setcapture().
... syntax document.releasecapture(); once mouse capture is released, mouse events will no longer all be directed to the element on which capture is enabled.
... example see the example for element.setcapture().
DocumentFragment.querySelector() - Web APIs
Web › API › DocumentFragment › querySelector
the documentfragment.queryselector() method returns the first element, or null if no matches are found, within the documentfragment (using depth-first pre-order traversal of the document's nodes) that matches the specified group of selectors.
... if the selector matches an id and this id is erroneously used several times in the document, it returns the first matching element.
... syntax element = documentfragment.queryselector(selectors); parameters selectors is a domstring containing one or more css selectors separated by commas.
... examples basic example in this basic example, the first element in the documentfragment with the class "myclass" is returned: var el = documentfragment.queryselector(".myclass"); css syntax and the method's argument the string argument pass to queryselector must follow the css syntax.
Comparison of Event Targets - Web APIs
Web › API › Event › Comparison of Event Targets
there are five targets to consider: property defined in purpose event.target dom event interface the dom element on the lefthand side of the call that triggered this event, eg: element.dispatchevent(event) event.currenttarget dom event interface the eventtarget whose eventlisteners are currently being processed.
...on-standard { background-color: #902d37; } </style> </head> <body> <table> <thead> <tr> <td class="standard">original target dispatching the event <small>event.target</small></td> <td class="standard">target who's event listener is being processed <small>event.currenttarget</small></td> <td class="standard">identify other element (if any) involved in the event <small>event.relatedtarget</small></td> <td class="non-standard">if there was a retargetting of the event for some reason <small> event.explicitoriginaltarget</small> contains the target before retargetting (never contains anonymous targets)</td> <td class="non-standard">if there was a retargetting of the event for some reason <small> event.o...
... </thead> <tr> <td id="target"></td> <td id="currenttarget"></td> <td id="relatedtarget"></td> <td id="explicitoriginaltarget"></td> <td id="originaltarget"></td> </tr> </table> <p>clicking on the text will show the difference between explicitoriginaltarget, originaltarget, and target</p> <script> function handleclicks(e) { document.getelementbyid('target').innerhtml = e.target; document.getelementbyid('currenttarget').innerhtml = e.currenttarget; document.getelementbyid('relatedtarget').innerhtml = e.relatedtarget; document.getelementbyid('explicitoriginaltarget').innerhtml = e.explicitoriginaltarget; document.getelementbyid('originaltarget').innerhtml = e.originaltarget; } function handlemouse...
...over(e) { document.getelementbyid('target').innerhtml = e.target; document.getelementbyid('relatedtarget').innerhtml = e.relatedtarget; } document.addeventlistener('click', handleclicks, false); document.addeventlistener('mouseover', handlemouseover, false); </script> </body> </html> use of target and relatedtarget the relatedtarget property for the mouseover event holds the node that the mouse was previously over.
EventListener - Web APIs
Web › API › EventListener
example html <button id="btn">click here!</button> javascript const buttonelement = document.getelementbyid('btn'); // add a handler for the 'click' event by providing a callback function.
... // whenever the element is clicked, a pop-up with "element clicked!" will // appear.
... buttonelement.addeventlistener('click', function (event) { alert('element clicked through function!'); }); // for compatibility, a non-function object with a `handleevent` property is // treated just the same as a function itself.
... buttonelement.addeventlistener('click', { handleevent: function (event) { alert('element clicked through handleevent property!'); } }); result see also: addeventlistener specifications specification status comment domthe definition of 'eventlistener' in that specification.
EventTarget.removeEventListener() - Web APIs
Web › API › EventTarget › removeEventListener
for example, consider this call to addeventlistener(): element.addeventlistener("mousedown", handlemousedown, true); now consider each of these two calls to removeeventlistener(): element.removeeventlistener("mousedown", handlemousedown, false); // fails element.removeeventlistener("mousedown", handlemousedown, true); // succeeds the first call fails because the value of usecapture doesn't match.
... now consider this: element.addeventlistener("mousedown", handlemousedown, { passive: true }); here, we specify an options object in which passive is set to true, while the other options are left to the default value of false.
... element.removeeventlistener("mousedown", handlemousedown, { passive: true }); // succeeds element.removeeventlistener("mousedown", handlemousedown, { capture: false }); // succeeds element.removeeventlistener("mousedown", handlemousedown, { capture: true }); // fails element.removeeventlistener("mousedown", handlemousedown, { passive: false }); // succeeds element.removeeventlistener("mousedown", handlemousedown, false); // succeeds element.removeeventlistener("mousedown", handlemousedown, true); // fails it's worth noting that some browser relea...
... const body = document.queryselector('body') const clicktarget = document.getelementbyid('click-target') const mouseovertarget = document.getelementbyid('mouse-over-target') let toggle = false; function makebackgroundyellow() { if (toggle) { body.style.backgroundcolor = 'white'; } else { body.style.backgroundcolor = 'yellow'; } toggle = !toggle; } clicktarget.addeventlistener('click', makebackgroundyellow, false ); mouseovertarget.addev...
GlobalEventHandlers.ondblclick - Web APIs
Web › API › GlobalEventHandlers › ondblclick
the ondblclick property of the globaleventhandlers mixin is an eventhandler that processes dblclick events on the given element.
... the dblclick event is raised when the user double clicks an element.
...within the function, this will be the element upon which the event was triggered.
... html <p>double click anywhere in this example.</p> <p id="log"></p> javascript let log = document.getelementbyid('log'); document.ondblclick = logdoubleclick; function logdoubleclick(e) { log.textcontent = `position: (${e.clientx}, ${e.clienty})`; } result specifications specification status comment html living standardthe definition of 'ondblclick' in that specification.
GlobalEventHandlers.ondrag - Web APIs
Web › API › GlobalEventHandlers › ondrag
syntax var draghandler = targetelement.ondrag; return value draghandler the drag event handler for element targetelement.
... example this example includes the use of the ondrag attribute handler to set an element's drag event handler.
... } </style> </head> <script> function drag_handler(ev) { console.log("drag"); } function dragstart_handler(ev) { console.log("dragstart"); ev.datatransfer.setdata("text", ev.target.id); } function drop_handler(ev) { console.log("drop"); ev.currenttarget.style.background = "lightyellow"; ev.preventdefault(); var data = ev.datatransfer.getdata("text"); ev.target.appendchild(document.getelementbyid(data)); } function dragover_handler(ev) { console.log("dragover"); ev.preventdefault(); } </script> <body> <h1>examples of <code>ondrag</code>, <code>ondrop</code>, <code>ondragstart</code>, <code>ondragover</code></h1> <div> <!-- <div class="source"> --> <p id="source" ondrag="drag_handler(event);" ondragstart="dragstart_handler(event);" draggable="true"> select this element, dra...
...g it to the drop zone and then release the selection to move the element.</p> </div> <div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">drop zone</div> </body> </html> specifications specification status comment html living standardthe definition of 'ondrag' in that specification.
GlobalEventHandlers.ondragover - Web APIs
Web › API › GlobalEventHandlers › ondragover
syntax var dragoverhandler = targetelement.ondragover; return value dragoverhandler the dragover event handler for element targetelement.
... example this example demonstrates using the ondragover attribute handler to set an element's dragover event handler.
... } </style> </head> <script> function drag_handler(ev) { console.log("drag"); } function dragstart_handler(ev) { console.log("dragstart"); ev.datatransfer.setdata("text", ev.target.id); } function drop_handler(ev) { console.log("drop"); ev.currenttarget.style.background = "lightyellow"; ev.preventdefault(); var data = ev.datatransfer.getdata("text"); ev.target.appendchild(document.getelementbyid(data)); } function dragover_handler(ev) { console.log("dragover"); ev.preventdefault(); } </script> <body> <h1>examples of <code>ondrag</code>, <code>ondrop</code>, <code>ondragstart</code>, <code>ondragover</code></h1> <div> <p id="source" ondrag="drag_handler(event);" ondragstart="dragstart_handler(event);" draggable="true"> select this element, drag it to the drop zone and then...
... release the selection to move the element.</p> </div> <div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">drop zone</div> </body> </html> specifications specification status comment html living standardthe definition of 'ondragover' in that specification.
GlobalEventHandlers.ondragstart - Web APIs
Web › API › GlobalEventHandlers › ondragstart
syntax var dragstarthandler = targetelement.ondragstart; return value dragstarthandler the dragstart event handler for element targetelement.
... example this example demonstrates using the ondragstart attribute handler to set an element's dragstart event handler.
... } </style> </head> <script> function drag_handler(ev) { console.log("drag"); } function dragstart_handler(ev) { console.log("dragstart"); ev.datatransfer.setdata("text", ev.target.id); } function drop_handler(ev) { console.log("drop"); ev.currenttarget.style.background = "lightyellow"; ev.preventdefault(); var data = ev.datatransfer.getdata("text"); ev.target.appendchild(document.getelementbyid(data)); } function dragover_handler(ev) { console.log("dragover"); ev.preventdefault(); } </script> <body> <h1>examples of <code>ondrag</code>, <code>ondrop</code>, <code>ondragstart</code>, <code>ondragover</code></h1> <div> <p id="source" ondrag="drag_handler(event);" ondragstart="dragstart_handler(event);" draggable="true"> select this element, drag it to the drop zone and then...
... release the selection to move the element.</p> </div> <div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">drop zone</div> </body> </html> specifications specification status comment html living standardthe definition of 'ondragstart' in that specification.
GlobalEventHandlers.ondrop - Web APIs
Web › API › GlobalEventHandlers › ondrop
syntax var drophandler = targetelement.ondrop; return value drophandler the drop event handler for element targetelement.
... example this example demonstrates the use of the ondrop attribute to define an element's drop event handler.
... } </style> </head> <script> function drag_handler(ev) { console.log("drag"); } function dragstart_handler(ev) { console.log("dragstart"); ev.datatransfer.setdata("text", ev.target.id); } function drop_handler(ev) { console.log("drop"); ev.currenttarget.style.background = "lightyellow"; ev.preventdefault(); var data = ev.datatransfer.getdata("text"); ev.target.appendchild(document.getelementbyid(data)); } function dragover_handler(ev) { console.log("dragover"); ev.preventdefault(); } </script> <body> <h1>examples of <code>ondrag</code>, <code>ondrop</code>, <code>ondragstart</code>, <code>ondragover</code></h1> <div class="source"> <p id="source" ondrag="drag_handler(event);" ondragstart="dragstart_handler(event);" draggable="true"> select this element, drag it to the dro...
...p zone and then release the selection to move the element.</p> </div> <div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">drop zone</div> </body> </html> specifications specification status comment html living standardthe definition of 'ondrop' in that specification.
GlobalEventHandlers.onerror - Web APIs
Web › API › GlobalEventHandlers › onerror
when a resource (such as an <img> or <script>) fails to load, an error event using interface event is fired at the element that initiated the load, and the onerror() handler on the element is invoked.
... syntax for historical reasons, different arguments are passed to window.onerror and element.onerror handlers (as well as on error-type window.addeventlistener handlers).
... element.onerror element.onerror = function(event) { ...
... } element.onerror accepts a function with a single argument of type event.
GlobalEventHandlers.onfocus - Web APIs
Web › API › GlobalEventHandlers › onfocus
the onfocus property of the globaleventhandlers mixin is an eventhandler that processes focus events on the given element.
... the focus event is raised when the user sets focus on an element.
... for onfocus to fire on non-input elements, they must be given the tabindex attribute (see building keyboard accessibility back in for more details).
... example this example uses onblur and onfocus to change the text within an <input> element.
GlobalEventHandlers.onmouseout - Web APIs
Web › API › GlobalEventHandlers › onmouseout
the mouseout event fires when the mouse leaves an element.
... for example, when the mouse moves off of an image in the web page, the mouseout event is raised for that image element.
... syntax element.onmouseout = function; example this example adds an onmouseout and an onmouseover event to a paragraph.
... try moving your mouse over and out of the element.
GlobalEventHandlers.onpointerdown - Web APIs
Web › API › GlobalEventHandlers › onpointerdown
this event can be sent to window, document, and element objects.
... syntax target.onpointerdown = downhandler; var downhandler = target.onpointerdown; value a function to handle the pointerdown event for the target element, document, or window.
... var targetbox = document.getelementbyid("target"); targetbox.onpointerdown = handledown; function handledown(evt) { var action; switch(evt.pointertype) { case "mouse": action = "clicking"; break; case "pen": action = "tapping"; break; case "touch": action = "touching"; break; default: action = "interacting with"; break; } targetbox.innerhtml = "<strong>thanks for " + action + " me!</strong>"; evt.preventde...
... we also have a handler for pointerup events: targetbox.onpointerup = handleup; function handleup(evt) { targetbox.innerhtml = "tap me, click me, or touch me!"; evt.preventdefault(); } this code's job is to just restore the original text into the target box after the user's interaction with the element ends (for example, when they release the mouse button, or when they lift the stylus or finger from the screen).
HTMLCollection - Web APIs
Web › API › HTMLCollection
the htmlcollection interface represents a generic collection (array-like object similar to arguments) of elements (in document order) and offers methods and properties for selecting from the list.
... note: this interface is called htmlcollection for historical reasons (before the modern dom, collections implementing this interface could only have html elements as their items).
...matching by name is only done as a last resort, only in html, and only if the referenced element supports the name attribute.
... for example, assuming there is one <form> element in the document and its id is myform: var elem1, elem2; // document.forms is an htmlcollection elem1 = document.forms[0]; elem2 = document.forms.item(0); alert(elem1 === elem2); // shows: "true" elem1 = document.forms.myform; elem2 = document.forms.nameditem("myform"); alert(elem1 === elem2); // shows: "true" elem1 = document.forms["named.item.with.periods"]; specifications spec...
IntersectionObserver.root - Web APIs
Web › API › IntersectionObserver › root
the intersectionobserver interface's read-only root property identifies the element or document whose bounds are treated as the bounding box of the viewport for the element which is the observer's target.
... syntax var root = intersectionobserver.root; value a element or document object whose bounding box is used as the bounds of the viewport for the purposes of determining how much of the target element is visible.
... the intersection of this bounding rectangle, offset by any margins specified in the options passed to the intersectionobserver() constructor, the target element's bounds, minus the bounds of every element or other object which overlaps the target element, is considered to be the visible area of the target element.
... example this example sets the border of the intersection observer's root element to be a 2-pixel medium green line.
IntersectionObserverEntry.boundingClientRect - Web APIs
Web › API › IntersectionObserverEntry › boundingClientRect
the intersectionobserverentry interface's read-only boundingclientrect property returns a domrectreadonly which in essence describes a rectangle describing the smallest rectangle that contains the entire target element.
... syntax var boundsrect = intersectionobserverentry.boundingclientrect; value a domrectreadonly which describes the smallest rectangle that contains every part of the target element whose intersection change is being described.
... this value is obtained using the same algorithm as element.getboundingclientrect(), so refer to that article for details on precisely what is done to obtain this rectangle and what is and is not included within its bounds.
... in the general case, however, it's safe to simply think of this as the bounds rectangle of the target element.
IntersectionObserverEntry.intersectionRatio - Web APIs
Web › API › IntersectionObserverEntry › intersectionRatio
the intersectionobserverentry interface's read-only intersectionratio property tells you how much of the target element is currently visible within the root's intersection ratio, as a value between 0.0 and 1.0.
... syntax var intersectionratio = intersectionobserverentry.intersectionratio; value a number between 0.0 and 1.0 which indicates how much of the target element is actually visible within the root's intersection rectangle.
... example in this simple example, an intersection callback sets each target element's opacity to the intersection ratio of that element with the root.
... function intersectioncallback(entries) { entries.foreach(function(entry) { entry.target.style.opacity = entry.intersectionratio; }); } to see a more concrete example, take a look at handling intersection changes in timing element visibility with the intersection observer api.
IntersectionObserverEntry.intersectionRect - Web APIs
Web › API › IntersectionObserverEntry › intersectionRect
the intersectionobserverentry interface's read-only intersectionrect property is a domrectreadonly object which describes the smallest rectangle that contains the entire portion of the target element which is currently visible within the intersection root.
... syntax var intersectionrect = intersectionobserverentry.intersectionrect; value a domrectreadonly which describes the part of the target element that's currently visible within the root's intersection rectangle.
... example in this simple example, an intersection callback stores the intersection rectangle for later use by the code that draws the target elements' contents, so that only the visible area is redrawn.
... function intersectioncallback(entries) { entries.foreach(function(entry) { refreshzones.push({ element: entry.target, rect: entry.intersectionrect }); }); } specifications specification status comment intersection observerthe definition of 'intersectionobserverentry.intersectionrect' in that specification.
IntersectionObserverEntry.isIntersecting - Web APIs
Web › API › IntersectionObserverEntry › isIntersecting
the intersectionobserverentry interface's read-only isintersecting property is a boolean value which is true if the target element intersects with the intersection observer's root.
... syntax var isintersecting = intersectionobserverentry.isintersecting; value a boolean value which indicates whether the target element has transitioned into a state of intersection (true) or out of a state of intersection (false).
... example in this simple example, an intersection callback is used to update a counter of how many targeted elements are currently intersecting with the intersection root.
... function intersectioncallback(entries) { entries.foreach(function(entry) { if (entry.isintersecting) { intersectingcount += 1; } else { intersectingcount -= 1; } }); } to see a more concrete example, take a look at handling intersection changes in timing element visibility with the intersection observer api.
IntersectionObserverEntry.target - Web APIs
Web › API › IntersectionObserverEntry › target
the intersectionobserverentry interface's read-only target property indicates which targeted element has changed its amount of intersection with the intersection root.
... syntax var target = intersectionobserverentry.target; value the intersectionobserverentry's target property specifies which element previously targeted by calling intersectionobserver.observe() experienced a change in intersection with the root.
... example in this simple example, each targeted element's opacity is set to its intersectionratio.
... function intersectioncallback(entries) { entries.foreach(function(entry) { entry.target.opacity = entry.intersectionratio; }); } to see a more concrete example, take a look at handling intersection changes in timing element visibility with the intersection observer api.
KeyboardLayoutMap - Web APIs
Web › API › KeyboardLayoutMap
keyboardlayoutmap.size read only returns the number of elements in the keyboardlayoutmap object.
... methods keyboardlayoutmap.foreach() read only executes a provided function once for each element of keyboardlayoutmap.
... keyboardlayoutmap.get() returns the element with the given key from the keyboardlayoutmap object.
... keyboardlayoutmap.has() returns a boolean indicating whether the keyboardlayoutmap object has an element with the specified key.
KeyframeEffect.target - Web APIs
Web › API › KeyframeEffect › target
the target property of a keyframeeffect interface represents the element or pseudo-element being animated.
... it may be null for animations that do not target a specific element.
... syntax var targetelement = document.getelementbyid("elementtoanimate"); var keyframes = new keyframeeffect( targetelement, keyframeblock, timingoptions ); // returns #elementtoanimate keyframes.target; // assigns keyframes a new target keyframes.target = newtargetelement; value an element, csspseudoelement, or null.
... examples in the follow the white rabbit example, whiterabbit sets the target element to be animated: var whiterabbit = document.getelementbyid("rabbit"); var rabbitdownkeyframes = new keyframeeffect( whiterabbit, [ { transform: 'translatey(0%)' }, { transform: 'translatey(100%)' } ], { duration: 3000, fill: 'forwards' } ); // returns <div id=​"rabbit">​click the rabbit's ears!​</div>​ rabbitdownkeyframes.target; specifications specification status comment web animationsthe definition of 'keyframeeffect' in that specification.
KeyframeEffectOptions - Web APIs
Web › API › KeyframeEffectOptions
the keyframeeffectoptions dictionary, part of the web animations api, is used by element.animate(), keyframeeffectreadonly() and keyframeeffect() to describe timing properties for animation effects.
... pseudoelement optional the selector of the pseudo-element to be targeted, if any.
... fill optional dictates whether the animation's effects should be reflected by the element(s) prior to playing ("backwards"), retained after the animation has completed playing ("forwards"), or both.
...defaults to 1, and can also take a value of infinity to make it repeat for as long as the element exists.
LayoutShiftAttribution - Web APIs
Web › API › LayoutShiftAttribution
the layoutshiftattribution interface of the layout instability api provides debugging information about elements which have shifted.
... properties layoutshiftattribution.node returns the element that has shifted (null if it has been removed).
... layoutshiftattribution.previousrect returns a domrect representing the position of the element before the shift.
... layoutshiftattribution.currentrect returns a domrect representing the position of the element after the shift.
MediaDevices.getUserMedia() - Web APIs
Web › API › MediaDevices › getUserMedia
for example, this line in the http headers will enable use of a camera for the document and any embedded <iframe> elements that are loaded from the same origin: feature-policy: camera 'self' this will request access to the microphone for the current origin and the specific origin https://developer.mozilla.org: feature-policy: microphone 'self' https://developer.mozilla.org if you're using getusermedia() within an <iframe>, you can request permission just for that frame, which is clearly more secure than requesti...
...the following are examples of situations in which getusermedia() is not permitted to be called: a document loaded into a sandboxed <iframe> element cannot call getusermedia() unless the <iframe> has its sandbox attribute set to allow-same-origin.
... examples width and height this example gives a preference for camera resolution, and assigns the resulting mediastream object to a video element.
... var front = false; document.getelementbyid('flip-button').onclick = function() { front = !front; }; var constraints = { video: { facingmode: (front?
MediaKeyStatusMap - Web APIs
Web › API › MediaKeyStatusMap
methods mediakeystatusmap.entries() read only returns a new iterator object containing an array of [key, value] for each element in the status map, in insertion order.
... mediakeystatusmap.keys() read only returns a new iterator object containing keys for each element in the status map, in insertion order.
... mediakeystatusmap.values() read only returns a new iterator object containing values for each element in the status map, in insertion order.
... mediakeystatusmap.[@@iterator]() read only returns a new iterator object containing an array of [key, value] for each element in the status map, in insertion order.
MediaSource - Web APIs
Web › API › MediaSource
the mediasource interface of the media source extensions api represents a source of media data for an htmlmediaelement object.
... a mediasource object can be attached to a htmlmediaelement to be played in the user agent.
... mediasource.readystate read only returns an enum representing the state of the current mediasource, whether it is not currently attached to a media element (closed), attached and ready to receive sourcebuffer objects (open), or attached but the stream has been ended via mediasource.endofstream() (ended.) mediasource.duration gets and sets the duration of the current media being presented.
... mediasource.setliveseekablerange() sets the range that the user can seek to in the media element.
Using the Media Capabilities API - Web APIs
Web › API › Media Capabilities API › Using the Media Capabilities API
in short, this api replaces—and improves upon—the mediasource method istypesupported() or the htmlmediaelement method canplaytype().
...n> <option>2500</option> <option>800</option> </select> </li> </ul> <p><input type="button" value="test this video configuration" id="tryit"></p> </form> <ul id="results"></ul> javascript let mc = { videoconfiguration : new object(), tryit: function () { mc.createconfiguration(); mc.testit(); }, createconfiguration: function () { var size = document.getelementbyid('size').value.split('x'); mc.videoconfiguration = { type: 'file', video: { contenttype: document.getelementbyid('codec').value, width: size[0], height: size[1], bitrate: document.getelementbyid('bitrate').value, framerate: document.getelementbyid('framerate').value, } } }, testit: function () { let content = ''; na...
...vigator.mediacapabilities.decodinginfo(mc.videoconfiguration).then(result => { var li = document.createelement('li'), mcv = mc.videoconfiguration.video; content = 'a ' + mcv.width + 'x' + mcv.height + ', ' + mcv.contenttype + ' at ' + mcv.framerate + 'fps and ' + mcv.bitrate + ' bps video ' + (result.supported ?
...' is ' : ' is not ') + 'power efficient.'; var ul = document.getelementbyid("results") li.innerhtml = content; ul.appendchild(li); }).catch((error) => { var li = document.createelement('li'), ul = document.getelementbyid("results"); li.innertext = 'codec ' + mc.videoconfiguration.video.contenttype + ' threw an error: ' + error; ul.appendchild(li); }); } } document.getelementbyid('tryit').addeventlistener('click', mc.tryit); live result ...
MutationObserver.MutationObserver() - Web APIs
Web › API › MutationObserver › MutationObserver
example this example simply creates a new mutationobserver configured to watch a node and all of its children for additions and removals of elements to the tree, as well as any changes to attributes on any of the elements in the tree.
... (see mutation.addednodes and mutation.removednodes.) */ break; case 'attributes': /* an attribute value changed on the element in mutation.target.
... const targetnode = document.queryselector("#someelement"); const observeroptions = { childlist: true, attributes: true, // omit (or set to false) to observe only changes to the parent node subtree: true } const observer = new mutationobserver(callback); observer.observe(targetnode, observeroptions); the desired subtree is located by finding an element with the id someelement.
... from this point until disconnect() is called, callback() will be called each time an element is added to or removed from the dom tree rooted at targetnode, or any of those elements' attributes are changed.
Node.nodeName - Web APIs
Web › API › Node › nodeName
values for the different types of nodes are: interface nodename value attr the value of attr.name cdatasection "#cdata-section" comment "#comment" document "#document" documentfragment "#document-fragment" documenttype the value of documenttype.name element the value of element.tagname entity the entity name entityreference the name of entity reference notation the notation name processinginstruction the value of processinginstruction.target text "#text" example given the following markup: <div id="d1">hello world</div> <input type="text" id="t"> and the following script: var...
... div1 = document.getelementbyid("d1"); var text_field = document.getelementbyid("t"); text_field.value = div1.nodename; in xhtml (or any other xml format), text_field's value would read "div".
... however, in html, text_field's value would read "div", because nodename and tagname return in upper case on html elements in doms flagged as html documents.
... note that the element.tagname property could have been used instead, since nodename has the same value as tagname for an element.
Node.removeChild() - Web APIs
Web › API › Node › removeChild
if child is actually not a child of the element node, the method throws an exception.
... this will also happen if child was in fact a child of element at the time of the call, but was removed by an event handler invoked in the course of trying to remove the element (e.g., blur.) errors thrown the method throws an exception in 2 different ways: if the child was in fact a child of element and so existing on the dom, but was removed the method throws the following exception: uncaught notfounderror: failed to execute 'removechild' on 'node': the node to be removed is not a child of this node.
... examples simple examples given this html: <div id="top"> <div id="nested"></div> </div> to remove a specified element when knowing its parent node: let d = document.getelementbyid("top"); let d_nested = document.getelementbyid("nested"); let throwawaynode = d.removechild(d_nested); to remove a specified element without having to specify its parent node: let node = document.getelementbyid("nested"); if (node.parentnode) { node.parentnode.removechild(node); } to remove all children from an element: let element = document.getelementbyid("top"); while (element.firstchild) { el...
...ement.removechild(element.firstchild); } causing a typeerror <!--sample html code--> <div id="top"> </div> <script type="text/javascript"> let top = document.getelementbyid("top"); let nested = document.getelementbyid("nested"); // throws uncaught typeerror let garbage = top.removechild(nested); </script> causing a notfounderror <!--sample html code--> <div id="top"> <div id="nested"></div> </div> <script type="text/javascript"> let top = document.getelementbyid("top"); let nested = document.getelementbyid("nested"); // this first call correctly removes the node let garbage = top.removechild(nested); // throws uncaught notfounderror garbage = top.removechild(nested); </script> specifications specification status comment domthe defini...
NodeList.prototype.forEach() - Web APIs
Web › API › NodeList › forEach
syntax somenodelist.foreach(callback[, thisarg]); parameters callback a function to execute on each element of somenodelist.
... it accepts 3 parameters: currentvalue the current element being processed in somenodelist.
... example let node = document.createelement("div"); let kid1 = document.createelement("p"); let kid2 = document.createtextnode("hey"); let kid3 = document.createelement("span"); node.appendchild(kid1); node.appendchild(kid2); node.appendchild(kid3); let list = node.childnodes; list.foreach( function(currentvalue, currentindex, listobj) { console.log(currentvalue + ', ' + currentindex + ', ' + this); }, 'mythisarg' ); the above code results in the following: [object htmlparagraphelement], 0, mythisarg [object text], 1, mythisar...
...g [object htmlspanelement], 2, mythisarg polyfill this polyfill adds compatibility to all browsers supporting es5: if (window.nodelist && !nodelist.prototype.foreach) { nodelist.prototype.foreach = function (callback, thisarg) { thisarg = thisarg || window; for (var i = 0; i < this.length; i++) { callback.call(thisarg, this[i], i, this); } }; } or if (window.nodelist && !nodelist.prototype.foreach) { nodelist.prototype.foreach = array.prototype.foreach; } the above behavior is how many browsers actually implement nodelist.prototype.foreach() (chrome, for example).
ParentNode.prepend() - Web APIs
Web › API › ParentNode › prepend
examples prepending an element var parent = document.createelement("div"); var p = document.createelement("p"); var span = document.createelement("span"); parent.append(p); parent.prepend(span); console.log(parent.childnodes); // nodelist [ <span>, <p> ] prepending text var parent = document.createelement("div"); parent.append("some text"); parent.prepend("headline: "); console.log(parent.textcontent); // "headline: some...
... text" appending an element and text var parent = document.createelement("div"); var p = document.createelement("p"); parent.prepend("some text", p); console.log(parent.childnodes); // nodelist [ #text "some text", <p> ] parentnode.prepend() is unscopable the prepend() method is not scoped into the with statement.
... var parent = document.createelement("div"); with(parent) { prepend("foo"); } // referenceerror: prepend is not defined polyfill you can polyfill the prepend() method if it's not available: // source: https://github.com/jserz/js_piece/blob/master/dom/parentnode/prepend()/prepend().md (function (arr) { arr.foreach(function (item) { if (item.hasownproperty('prepend')) { return; } object.defineproperty(item, 'prepend', { configurable: true, enumerable: true, writable: true, value: function prepend() { var argarr = array.prototype.slice.call(arguments), docfrag = document.createdocumentfragment(); argarr.foreach(function (argitem) { var isnode = argitem instanceof node...
...argitem : document.createtextnode(string(argitem))); }); this.insertbefore(docfrag, this.firstchild); } }); }); })([element.prototype, document.prototype, documentfragment.prototype]); specification specification status comment domthe definition of 'parentnode.prepend()' in that specification.
PublicKeyCredentialCreationOptions.pubKeyCredParams - Web APIs
Web › API › PublicKeyCredentialCreationOptions › pubKeyCredParams
the pubkeycredparams property of the publickeycredentialcreationoptions dictionary is an array whose elements are objects describing the desired features of the credential to be created.
... if this array contains multiple elements, they are sorted by descending order of preference.
... syntax pubkeycredparams = publickeycredentialcreationoptions.pubkeycredparams value an array whose elements are objects with the following properties: type a string describing type of public-key credential to be created.
... though those elements are sorted by preference (the first element being the most prefered), it is up to the client to choose among those elements for building the credential.
RTCPeerConnection.addTrack() - Web APIs
Web › API › RTCPeerConnection › addTrack
otherwise, the first time ontrack is called, a new stream is created and attached to the video element, and then the track is added to the new stream.
... peer: async opencall(pc) { const gumstream = await navigator.mediadevices.getusermedia( {video: true, audio: true}); for (const track of gumstream.gettracks()) { pc.addtrack(track, gumstream); } } the remote peer might then use a track event handler that looks like this: pc.ontrack = ({streams: [stream]} => videoelem.srcobject = stream; this sets the video element's current stream to the one that contains the track that's been added to the connection.
... var mediaconstraints = { audio: true, // we want an audio track video: true // ...and we want a video track }; var desc = new rtcsessiondescription(sdp); pc.setremotedescription(desc).then(function () { return navigator.mediadevices.getusermedia(mediaconstraints); }) .then(function(stream) { previewelement.srcobject = stream; stream.gettracks().foreach(track => pc.addtrack(track, stream)); }) this code takes sdp which has been received from the remote peer and constructs a new rtcsessiondescription to pass into setremotedescription().
... if that succeeds, the resulting stream is assigned as the source for a <video> element which is referenced by the variable previewelement.
ResizeObserverEntry.contentBoxSize - Web APIs
Web › API › ResizeObserverEntry › contentBoxSize
the contentboxsize read-only property of the resizeobserverentry interface returns an array containing the new content box size of the observed element when the callback is run.
... syntax var mycontentboxsize = resizeobserverentry.contentboxsize; value an object containing the new content box size of the observed element.
... this object contains two properties: blocksize the length of the observed element's content box in the block dimension.
... inlinesize the length of the observed element's content box in the inline dimension.
ResizeObserverEntry.contentRect - Web APIs
Web › API › ResizeObserverEntry › contentRect
the contentrect read-only property of the resizeobserverentry interface returns a domrectreadonly object containing the new size of the observed element when the callback is run.
... syntax var contentrect = resizeobserverentry.contentrect; value a domrectreadonly object containing the new size of the element indicated by the target property.
... if the target is an html element, the returned contentrect is the element's content box.
... if the target is an svgelement, the returned contentrect is the svg's bounding box.
cx - Web APIs
Web › API › SVGCircleElement › cx
the cx read-only property of the svgcircleelement interface reflects the cx attribute of a <circle> element and by that defines the x-coordinate of the circleʼs center.
... syntax var xcoordinate = element.cx; value an svganimatedlength representing the x-coordinate of the circleʼs center.
... example svg <svg xmlns="http://www.w3.org/2000/svg" viewbox="0 0 100 100" width="200" height="200"> <circle cx="50" cy="50" r="50" fill="gold" id="circle"/> </svg> javascript const circle = document.getelementbyid('circle'); console.log(circle.cx); specifications specification status comment scalable vector graphics (svg) 2the definition of 'svgcircleelement.cx' in that specification.
... candidate recommendation no change scalable vector graphics (svg) 1.1 (second edition)the definition of 'svgcircleelement.cx' in that specification.
cy - Web APIs
Web › API › SVGCircleElement › cy
the cy read-only property of the svgcircleelement interface reflects the cy attribute of a <circle> element and by that defines the y-coordinate of the circleʼs center.
... syntax var ycoordinate = element.cy; value an svganimatedlength representing the y-coordinate of the circleʼs center.
... example svg <svg xmlns="http://www.w3.org/2000/svg" viewbox="0 0 100 100" width="200" height="200"> <circle cy="50" cy="50" r="50" fill="gold" id="circle"/> </svg> javascript const circle = document.getelementbyid('circle'); console.log(circle.cy); specifications specification status comment scalable vector graphics (svg) 2the definition of 'svgcircleelement.cy' in that specification.
... candidate recommendation no change scalable vector graphics (svg) 1.1 (second edition)the definition of 'svgcircleelement.cy' in that specification.
r - Web APIs
Web › API › SVGCircleElement › r
the r read-only property of the svgcircleelement interface reflects the r attribute of a <circle> element and by that defines the radius of the circle.
... syntax var radius = element.r; value an svganimatedlength representing the radius of the circle.
... example svg <svg xmlns="http://www.w3.org/2000/svg" viewbox="0 0 100 100" width="200" height="200"> <circle r="50" r="50" r="50" fill="gold" id="circle"/> </svg> javascript const circle = document.getelementbyid('circle'); console.log(circle.r); specifications specification status comment scalable vector graphics (svg) 2the definition of 'svgcircleelement.r' in that specification.
... candidate recommendation no change scalable vector graphics (svg) 1.1 (second edition)the definition of 'svgcircleelement.r' in that specification.
SVGDocument - Web APIs
Web › API › SVGDocument
svg document interface when an "svg" element is embedded inline as a component of a document from another namespace, such as when an "svg" element is embedded inline within an xhtml document, then an svgdocument object will not exist; instead, the root object in the document object hierarchy will be a document object of a different type, such as an htmldocument object.
... interface overview also implement none methods none properties domstring domain domstring referrer svgsvgelement rootelement domstring title domstring url normative document svg 1.1 (2nd edition) properties name type description domain domstring the domain name of the server that served the document, or a null string if the server cannot be identified by a domain name.
... rootelement svgsvgelement the root "svg" in the document hierarchy.
... title domstring the title of a document as specified by the "title" sub-element of the "svg" root element (i.e., <svg><title>here is the title</title>...</svg>) url domstring the complete uri of the document.
SVGTests - Web APIs
Web › API › SVGTests
the svgtests interface is used to reflect conditional processing attributes and is mixed into other interfaces for elements that support these attributes.
... properties svgtests.requiredfeatures read only an svgstringlist corresponding to the requiredfeatures attribute of the given element.
... svgtests.requiredextensions read only an svgstringlist corresponding to the requiredextensions attribute of the given element.
... svgtests.systemlanguage read only an svgstringlist corresponding to the systemlanguage attribute of the given element.
SVGTransformList - Web APIs
Web › API › SVGTransformList
example using multiple svgtransform objects in this example we create a function that will apply three different transformations to the svg element that has been clicked on.
...we apply multiple transformation by appending the transform object to the svgtransformlist associated with an svg element.
... <svg id="my-svg" viewbox="0 0 300 280" xmlns="http://www.w3.org/2000/svg" version="1.1"> <desc>example showing how to transform svg elements that using svgtransform objects</desc> <script type="application/ecmascript"> <![cdata[ function transformme(evt) { // svg root element to access the createsvgtransform() function var svgroot = evt.target.parentnode; // svgtransformlist of the element that has been clicked on var tfmlist = evt.target.transform.baseval; // create a seperate transform object for each transform var translate = svgroot.createsvgtransform(); translate.settranslate(50,5); var rotate = svgroot.createsvgtransform(); rotate.setrotate(10,0,0); var scale = svgroot.createsvgtransform(); scale.setscale(0...
....8,0.8); // apply the transformations by appending the svgtranform objects to the svgtransformlist associated with the element tfmlist.appenditem(translate); tfmlist.appenditem(rotate); tfmlist.appenditem(scale); } ]]> </script> <polygon fill="orange" stroke="black" stroke-width="5" points="100,225 100,115 130,115 70,15 70,15 10,115 40,115 40,225" onclick="transformme(evt)"/> <rect x="200" y="100" width="100" height="100" fill="yellow" stroke="black" stroke-width="5" onclick="transformme(evt)"/> <text x="40" y="250" font-family="verdana" font-size="16" fill="green" > click on a shape to transform it </text> </svg> live preview: specifications specification status comment scalable...
ShadowRoot.host - Web APIs
Web › API › ShadowRoot › host
the host read-only property of the shadowroot returns a reference to the dom element the shadowroot is attached to.
... syntax const someelement = shadowroot.host value a dom element.
... examples let customelem = document.queryselector('my-shadow-dom-element'); let shadow = customelem.shadowroot; ...
... // return the original host element some time later let hostelem = shadow.host; specifications specification status comment domthe definition of 'shadowroot.host' in that specification.
StereoPannerNode.pan - Web APIs
Web › API › StereoPannerNode › pan
example in our stereopannernode example (see source code) html we have a simple <audio> element along with a slider <input> to increase and decrease pan value.
... in the javascript we create a mediaelementaudiosourcenode and a stereopannernode, and connect the two together using the connect() method.
... var audioctx = new (window.audiocontext || window.webkitaudiocontext)(); var myaudio = document.queryselector('audio'); var pancontrol = document.queryselector('.panning-control'); var panvalue = document.queryselector('.panning-value'); pre.innerhtml = myscript.innerhtml; // create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a stereo panner var pannode = audioctx.createstereopanner(); // event handler function to increase panning to the right and left // when the slider is moved pancontrol.oninput = function() { pannode.pan.setvalueattime(pancontrol.value, audioctx.currenttime); panvalue.inner...
...html = pancontrol.value; } // connect the mediaelementaudiosourcenode to the pannode // and the pannode to the destination, so we can play the // music and adjust the panning using the controls source.connect(pannode); pannode.connect(audioctx.destination); specifications specification status comment web audio apithe definition of 'pan' in that specification.
StereoPannerNode - Web APIs
Web › API › StereoPannerNode
example in our stereopannernode example (see source code) html we have a simple <audio> element along with a slider <input> to increase and decrease pan value.
... in the javascript we create a mediaelementaudiosourcenode and a stereopannernode, and connect the two together using the connect() method.
... var audioctx = new (window.audiocontext || window.webkitaudiocontext)(); var myaudio = document.queryselector('audio'); var pancontrol = document.queryselector('.panning-control'); var panvalue = document.queryselector('.panning-value'); pre.innerhtml = myscript.innerhtml; // create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a stereo panner var pannode = audioctx.createstereopanner(); // event handler function to increase panning to the right and left // when the slider is moved pancontrol.oninput = function() { pannode.pan.setvalueattime(pancontrol.value, audioctx.currenttime); panvalue.inner...
...html = pancontrol.value; } // connect the mediaelementaudiosourcenode to the pannode // and the pannode to the destination, so we can play the // music and adjust the panning using the controls source.connect(pannode); pannode.connect(audioctx.destination); specifications specification status comment web audio apithe definition of 'stereopannernode' in that specification.
SubmitEvent.submitter - Web APIs
Web › API › SubmitEvent › submitter
the read-only submitter property found on the submitevent interface specifies the submit button or other element that was invoked to cause the form to be submitted.
... syntax let submitter = submitevent.submitter; value an element, indicating the element that sent the submit event to the form.
... while this is often an <input> element whose type or a <button> whose type is submit, it could be some other element which has initiated a submission process.
...each of the submit elements' id is used to identify which payment processor the button corresponds to.
Text.wholeText - Web APIs
Web › API › Text › wholeText
what happened was you removed the strong element, but the removed sentence’s element separated two text nodes.
...not separated by an element boundary) text nodes combined.
...what we have now is this: <p>thru-hiking is great, but <a href="http://en.wikipedia.org/wiki/absentee_ballot">casting a ballot</a> is tricky.</p> some uses of the whole-text functionality may be better served by using node.textcontent, or the longstanding element.innerhtml; that’s fine and probably clearer in most circumstances.
... if you have to work with mixed content within an element, as seen here, wholetext and replacewholetext() may be useful.
TouchEvent.targetTouches - Web APIs
Web › API › TouchEvent › targetTouches
the targettouches read-only property is a touchlist listing all the touch objects for touch points that are still in contact with the touch surface and whose touchstart event occurred inside the same target element as the current target element.
... syntax var touches = touchevent.targettouches; return value touches a touchlist listing all the touch objects for touch points that are still in contact with the touch surface and whose touchstart event occurred inside the same target element as the current target element.
...the touchevent.targettouches property is a touchlist object that includes those tps that are currently touching the surface and started on the element that is the target of the current event.
... function touches_in_target(ev) { // return true if all of the touches are within the target element; // otherwise return false.
TrackEvent - Web APIs
Web › API › TrackEvent
the trackevent interface, which is part of the html dom specification, is used for events which represent changes to a set of available tracks on an html media element; these events are addtrack and removetrack.
... events based on trackevent are always sent to one of the media track list types: events involving video tracks are always sent to the videotracklist found in htmlmediaelement.videotracks events involving audio tracks are always sent to the audiotracklist specified in htmlmediaelement.audiotracks events affecting text tracks are sent to the texttracklist object indicated by htmlmediaelement.texttracks.
... example this example sets up a function, handletrackevent(), which is callled for any addtrack or removetrack event on the first <video> element found in the document.
... console.log("added a " + trackkind + " track"); break; case "removetrack": console.log("removed a " + trackkind + " track"); break; } } the event handler uses the javascript instanceof operator to determine which type of track the event occurred on, then outputs to console a message indicating what kind of track it is and whether it's being added to or removed from the element.
UIEvent.layerX - Web APIs
Web › API › UIEvent › layerX
this property takes scrolling of the page into account and returns a value relative to the whole of the document unless the event occurs inside a positioned element, where the returned value is relative to the top left of the positioned element.
...owcoords(event)"> <p>to display the mouse coordinates please click anywhere on the page.</p> <div id="d1"> <span>this is an un-positioned div so clicking it will return layerx/layery values almost the same as pagex/pagey values.</span> </div> <div id="d2"> <span>this is a positioned div so clicking it will return layerx/layery values that are relative to the top-left corner of this positioned element.
...this is a positioned div so clicking it will return layerx/layery values that are relative to the top-left corner of this positioned element.
... note the pagex\pagey properties still return the absolute position in the document, including page scrolling.</span> </div> <div id="d3"> <form name="form_coords" id="form1"> parent element id: <input type="text" name="parentid" size="7" /><br /> pagex:<input type="text" name="pagexcoords" size="7" /> pagey:<input type="text" name="pageycoords" size="7" /><br /> layerx:<input type="text" name="layerxcoords" size="7" /> layery:<input type="text" name="layerycoords" size="7" /> </form> </div> </body> </html> specifications this property is not part of any specification.
UIEvent.layerY - Web APIs
Web › API › UIEvent › layerY
this property takes scrolling of the page into account, and returns a value relative to the whole of the document, unless the event occurs inside a positioned element, where the returned value is relative to the top left of the positioned element.
...owcoords(event)"> <p>to display the mouse coordinates please click anywhere on the page.</p> <div id="d1"> <span>this is an un-positioned div so clicking it will return layerx/layery values almost the same as pagex/pagey values.</span> </div> <div id="d2"> <span>this is a positioned div so clicking it will return layerx/layery values that are relative to the top-left corner of this positioned element.
...this is a positioned div so clicking it will return layerx/layery values that are relative to the top-left corner of this positioned element.
... note the pagex\pagey properties still return the absolute position in the document, including page scrolling.</span> </div> <div id="d3"> <form name="form_coords" id="form1"> parent element id: <input type="text" name="parentid" size="7" /><br /> pagex:<input type="text" name="pagexcoords" size="7" /> pagey:<input type="text" name="pageycoords" size="7" /><br /> layerx:<input type="text" name="layerxcoords" size="7" /> layery:<input type="text" name="layerycoords" size="7" /> </form> </div> </body> </html> specifications this property is not part of any specification.
VideoPlaybackQuality.droppedVideoFrames - Web APIs
Web › API › VideoPlaybackQuality › droppedVideoFrames
the read-only droppedvideoframes property of the videoplaybackquality interface returns the number of video frames which have been dropped rather than being displayed since the last time the media was loaded into the htmlvideoelement.
... syntax value = videoplaybackquality.droppedvideoframes; value an unsigned 64-bit value indicating the number of frames that have been dropped since the last time the media in the <video> element was loaded or reloaded.
...that value is then presented in an element for the user's reference.
... var videoelem = document.getelementbyid("my_vid"); var percentelem = document.getelementbyid("percent"); var quality = videoelem.getvideoplaybackquality(); var droppercent = (quality.droppedvideoframes/quality.totalvideoframes)*100; percentelem.innertext = math.trunc(droppercent).tostring(10); specifications specification status comment media playback qualitythe definition of 'videoplaybackquality.droppedvideoframes' in that specification.
WebGL2RenderingContext.texSubImage3D() - Web APIs
Web › API › WebGL2RenderingContext › texSubImage3D
pixels); void gl.texsubimage3d(target, level, xoffset, yoffset, zoffset, width, height, depth, format, type, htmlimageelement?
... pixels); void gl.texsubimage3d(target, level, xoffset, yoffset, zoffset, width, height, depth, format, type, htmlcanvaselement?
... pixels); void gl.texsubimage3d(target, level, xoffset, yoffset, zoffset, width, height, depth, format, type, htmlvideoelement?
... imagebitmap, imagedata, htmlimageelement, htmlcanvaselement, htmlvideoelement.
WebGLRenderingContext.bufferData() - Web APIs
Web › API › WebGLRenderingContext › bufferData
gl.element_array_buffer: buffer used for element indices.
... srcoffset a gluint specifying the element index offset where to start reading the buffer.
... examples using bufferdata var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var buffer = gl.createbuffer(); gl.bindbuffer(gl.array_buffer, buffer); gl.bufferdata(gl.array_buffer, 1024, gl.static_draw); getting buffer information to check the current buffer usage and buffer size, use the webglrenderingcontext.getbufferparameter() method.
... var dataarray = new float32array([1, 2, 3, 4]); var sizeinbytes = dataarray.length * dataarray.bytes_per_element; specifications specification status comment webgl 1.0the definition of 'bufferdata' in that specification.
WebGLRenderingContext.canvas - Web APIs
Web › API › WebGLRenderingContext › canvas
the webglrenderingcontext.canvas property is a read-only reference to the htmlcanvaselement or offscreencanvas object that is associated with the context.
... it might be null if it is not associated with a <canvas> element or an offscreencanvas object.
... syntax gl.canvas; return value either a htmlcanvaselement or offscreencanvas object or null.
... examples canvas element given this <canvas> element: <canvas id="canvas"></canvas> you can get back a reference to it from the webglrenderingcontext using the canvas property: var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); gl.canvas; // htmlcanvaselement offscreen canvas example using the experimental offscreencanvas object.
WebGLRenderingContext.getVertexAttrib() - Web APIs
Web › API › WebGLRenderingContext › getVertexAttrib
gl.vertex_attrib_array_size: returns a glint indicating the size of an element of the vertex array.
... gl.vertex_attrib_array_stride: returns a glint indicating the number of bytes between successive elements in the array.
... 0 means that the elements are sequential.
... gl.current_vertex_attrib: returns a float32array (with 4 elements) representing the current value of the vertex attribute at the given index.
Canvas size and WebGL - Web APIs
Web › API › WebGL API › By example › Canvas size and WebGL
« previousnext » this webgl example explores the effect of setting (or not setting) the canvas size to its element size in css pixels, as it appears in the browser window.
... the size of the first canvas is set to the styled element size, determined by css.
...the internal width and height properties of the canvas remain at default values, which are different than the actual size of the canvas element in the browser window.
...oes not seem to support html5 canvas.</canvas> <canvas>your browser does not seem to support html5 canvas.</canvas> body { text-align : center; } canvas { display : inline-block; width : 120px; height : 80px; margin : auto; padding : 0; border : none; background-color : black; } window.addeventlistener("load", function() { "use strict" var firstcanvas = document.getelementsbytagname("canvas")[0], secondcanvas = document.getelementsbytagname("canvas")[1]; firstcanvas.width = firstcanvas.clientwidth; firstcanvas.height = firstcanvas.clientheight; [firstcanvas, secondcanvas].foreach(function(canvas) { var gl = canvas.getcontext("webgl") || canvas.getcontext("experimental-webgl"); if (!gl) { document.queryselector("p").innerhtml = ...
WebGL tutorial - Web APIs
Web › API › WebGL API › Tutorial
webgl elements can be mixed with other html elements and composited with other parts of the page or page background.
... this tutorial describes how to use the <canvas> element to draw webgl graphics, starting with the basics.
... before you start using the <canvas> element is not very difficult, but you do need a basic understanding of html and javascript.
... the <canvas> element and webgl are not supported in some older browsers, but are supported in recent versions of all major browsers.
Web Animations API Concepts - Web APIs
Web › API › Web Animations API › Web Animations API Concepts
while four out of five browsers supported smil, it only animated svg elements, could not be used from css, and was very complex — often leading to inconsistent implementations.
... assembling the animation from disparate pieces we can assemble all these pieces together to create a working animation with the animation() constructor or we can use the element.animate() shortcut function.
... (read more about how to use element.animate() in using the web animations api.) uses the api allows for the creation of dynamic animations that can be updated on the fly as well as more straightforward, declarative animations like those css creates.
...(see animating like you just don’t care with element.animate.) in some instances, it may negate the need for a fully fledged library entirely in the same way vanilla javascript can be used without jquery for many purposes.
Using the Web Storage API - Web APIs
Web › API › Web Storage API › Using the Web Storage API
for example: function setstyles() { var currentcolor = localstorage.getitem('bgcolor'); var currentfont = localstorage.getitem('font'); var currentimage = localstorage.getitem('image'); document.getelementbyid('bgcolor').value = currentcolor; document.getelementbyid('font').value = currentfont; document.getelementbyid('image').value = currentimage; htmlelem.style.backgroundcolor = '#' + currentcolor; pelem.style.fontfamily = currentfont; imgelem.setattribute('src', currentimage); } here, the first three lines grab the values from local storage.
... next, we set the values displayed in the form elements to those values, so that they keep in sync when you reload the page.
... function populatestorage() { localstorage.setitem('bgcolor', document.getelementbyid('bgcolor').value); localstorage.setitem('font', document.getelementbyid('font').value); localstorage.setitem('image', document.getelementbyid('image').value); setstyles(); } the populatestorage() function sets three items in local storage — the background color, font, and image path.
... we've also included an onchange handler on each form element so that the data and styling are updated whenever a form value is changed: bgcolorform.onchange = populatestorage; fontform.onchange = populatestorage; imageform.onchange = populatestorage; responding to storage changes with the storageevent the storageevent is fired whenever a change is made to the storage object (note that this event is not fired for sessionstorage changes).
Using the aria-invalid attribute - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the aria-invalid attribute
this attribute can be used with any typical html form element; it is not limited to elements that have an aria role assigned.
... the snippet below shows a very simple validation function, which only checks for the presence of a particular character (in the real world, validation will likely be more sophisticated): function checkvalidity(aid, asearchterm, amsg){ var elem = document.getelementbyid(aid); var invalid = (elem.value.indexof(asearchterm) < 0); if (invalid) { elem.setattribute("aria-invalid", "true"); updatealert(amsg); } else { elem.setattribute("aria-invalid", "false"); updatealert(); } } the snippet below shows the alert functions, which add (or remove) the error message: function updatealert(msg) { var oldalert = doc...
...ument.getelementbyid("alert"); if (oldalert) { document.body.removechild(oldalert); } if (msg) { var newalert = document.createelement("div"); newalert.setattribute("role", "alert"); newalert.setattribute("id", "alert"); var content = document.createtextnode(msg); newalert.appendchild(content); document.body.appendchild(newalert); } } note that the alert has the aria role attribute set to "alert." working examples: alert role example (uses the aria-invalid attribute) notes when aria-invalid is used in conjunction with the aria-required attribute, aria-invalid should not be set to true before the form is submitted - only in response to validation.
... used in aria roles all elements of the base markup related aria techniques using the aria-required attribute using the alert role compatibility tbd: add support information for common ua and at product combinations additional resources wai-aria specification for the aria-invalid property wai authoring practices for forms ...
Using the aria-label attribute - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the aria-label attribute
the aria-label attribute is used to define a string that labels the current element.
...if there is visible text labeling the element, use aria-labelledby instead.
... this attribute can be used with any typical html element; it is not limited to elements that have an aria role assigned.
... used by aria roles all elements of the base markup related aria techniques using the aria-labelledby attribute compatibility tbd: add support information for common ua and at product combinations additional resources wai-aria specification for aria-label ...
Using the group role - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the group role
when the role is added to an element, the browser will send out an accessible group event to assistive technology products which can then notify the user about it.
...however, when a group is used in the context of list, authors must limit its children to listitem elements.
... group elements may be nested.
... possible effects on user agents and assistive technology when the group role is added to an element, or such an element becomes visible, the user agent should do the following: expose the element as having a group role in the operating system's accessibility api.
Using the log role - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the log role
the log role is used to identify an element that creates a live region where new information is added in a meaningful order and old information may disappear.
...when this role is added to an element, the browser will send out an accessible log event to assistive technology products which can then notify the user about it.
... possible effects on user agents and assistive technology when the log role is added to an element, or such an element becomes visible, the user agent should do the following: expose the element as having a log role in the operating system's accessibility api.
... <div id="chatarea" role="log"> <ul id="chatregion" aria-live="polite" aria-atomic="false"> <li>please choose a user name to begin using ajax chat.</li> </ul> <ul id="userlistregion" aria-live="off" aria-relevant="additions removals text"> </ul> </div> working examples: http://websiteaccessibility.donaldevans.com/2011/07/12/aria-log/ notes using the log role on an element implies that element has aria-live="polite".
x-ms-aria-flowfrom - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › x-ms-aria-flowfrom
the x-ms-aria-flowfrom property specifies the id of the previous element in an alternative reading order, allowing assistive technology to override the general default of reading in document source order.
... the property serves to define element relationships utilizing aria relationship attributes and the aria-flowto property.
... syntax x-ms-aria-flowfrom="elementid"; value the x-ms-aria-flowfrom property value uses an id selector to define which previous element the reading order will flow from.
... example <div tabindex="0" class="foo" id="element2" role="option" aria-posinset="1" aria-setsize="15" aria-flowto="element8" x-ms-aria-flowfrom="element5"> see also aria relationship attributes microsoft api extensions ...
ARIA: img role - Accessibility
Web › Accessibility › ARIA › Roles › Role Img
the aria img role can be used to identify multiple elements inside page content that should be considered as a single image.
... these elements could be images, code snippets, text, emojis, or other content that can be combined to deliver information in a visual manner.
... you shouldn't count on the alt text of individual elements images for conveying context to assistive technologies; most screenreaders will consider the element with role="img" set on it to be to be like a black box, and not access the individual elements inside it.
... <p id="image-1">text that describes the group of images.</p> </div> svg and role="img" if you are using embedded svg images in your page, it is a good idea to set role="img" on the outer <svg> element and give it a label.
ARIA: Suggestion role - Accessibility
Web › Accessibility › ARIA › Roles › Suggestion role
this should be used on an element that wraps an element with an insertion role, and one with a deletion role.
...this is the job of role="suggestion", which should be set on an element wrapping both of them like so: <p>freida’s pet is a <span role="suggestion"> <span role="deletion">black cat called luna</span> <span role="insertion">purple tyrannosaurus rex called tiny</span> </span>.
... best practices prefer html using the <ins> and <del> element will automatically communicate a section has a role of insertion or deletion.
... if at all possible, prefer using the html elements.
ARIA: heading role - Accessibility
Web › Accessibility › ARIA › Roles › heading role
the heading role defines this element as a heading to a page or section.
... description the heading role indicates to assistive technologies that this element should be treated like a heading.
... instead of using a <div> or <span> with a heading role and aria-level, consider using a native <h1> through <h6> element instead to indicate that this text is a heading, and what part of the structure it represents.
... recommendation precedence order the heading role overrides the native semantic meaning of the element it is being used for.
Operable - Accessibility
Web › Accessibility › Understanding WCAG › Operable
if you need to place elements in an unusual layout, it is better to make sure the source order is sensible, then use css features like positioning to handle the layout.
...<h2>) and <label> elements clearly describe the purpose of the content and form elements they are supposed to be describing.
... see ui controls, meaningful text labels, the basics of headings and paragraphs, the <label> element.
... 2.4.7 visible focus for focusable elements (aa) when tabbing through focusable elements such as links or form inputs, there should be a visual indicator to show you which element currently has focus.
-moz-image-rect - CSS: Cascading Style Sheets
Web › CSS › -moz-image-rect
function rotate() { var prevstyle = window.getcomputedstyle(document.getelementbyid("box4"), null).getpropertyvalue("background-image"); // now that we've saved the last one, start rotating for (var i=1; i<=4; i++) { var curid = "box" + i; // shift the background images var curstyle = window.getcomputedstyle(document.getelementbyid(curid), null).getpropertyvalue("background-image"); document.getelementbyid(curid).style.backgroundimage = prevstyle; ...
... prevstyle = curstyle; } } this uses window.getcomputedstyle() to fetch the style of each element, shifting it to the following element.
... notice that before it begins doing so it saves a copy of the last box's style since it will be overwritten by the third element's style.
... by simply copying the values of the background-image property from one element to the next with each mouse click, we achieve the desired effect.
-moz-image-region - CSS: Cascading Style Sheets
Web › CSS › -moz-image-region
for certain xul elements and pseudo-elements that use an image from the list-style-image property, this property specifies a region of the image that is used in place of the whole image.
... this allows elements to use different pieces of the same image to improve performance.
... formal definition initial valueautoapplies toxul <image> elements and :-moz-tree-image, :-moz-tree-twisty, and :-moz-tree-checkbox pseudo-elements.
... note: -moz-image-region only works with <image> elements where the icon is specified using list-style-image.
-moz-outline-radius-bottomleft - CSS: Cascading Style Sheets
Web › CSS › -moz-outline-radius-bottomleft
in mozilla applications, the -moz-outline-radius-bottomleft css property can be used to round the bottom-left corner of an element's outline.
... values <length> the radius of the circle defining the curvature of the bottom and left edges of the element, specified as a css <length>.
... <percentage> the radius of the circle defining the rounding of the bottom-left corner of the element, specified as the percentages of the bottom and left sides of the border box.
... formal definition initial value0applies toall elementsinheritednopercentagesrefer to the corresponding dimension of the border boxcomputed valueas specifiedanimation typea length, percentage or calc(); formal syntax <outline-radius>where <outline-radius> = <length> | <percentage> examples rounding a outline since this is a firefox-only property, this example will not display the desired effect if you are viewing this in a browser other than firefox.
-moz-outline-radius-bottomright - CSS: Cascading Style Sheets
Web › CSS › -moz-outline-radius-bottomright
in mozilla applications, the -moz-outline-radius-bottomright css property can be used to round the bottom-right corner of an element's outline.
... values <length> the radius of the circle defining the curvature of the bottom and right edges of the element, specified as a css <length>.
... <percentage> the radius of the circle defining the rounding of the bottom-right corner of the element, specified as the percentages of the bottom and right sides of the border box.
... formal definition initial value0applies toall elementsinheritednopercentagesrefer to the corresponding dimension of the border boxcomputed valueas specifiedanimation typea length, percentage or calc(); formal syntax <outline-radius>where <outline-radius> = <length> | <percentage> examples html <p>look at this paragraph's bottom-right corner.</p> css p { margin: 5px; border: solid cyan; outline: dotted red; -moz-outline-radius-bottomright: 2em; } result the example above will not display the desired effect if you are viewing this in a browser other than firefox.
-moz-outline-radius-topleft - CSS: Cascading Style Sheets
Web › CSS › -moz-outline-radius-topleft
in mozilla applications, the -moz-outline-radius-topleft css property can be used to round the top-left corner of an element's outline.
... values <length> the radius of the circle defining the curvature of the top and left edges of the element, specified as a css <length>.
... <percentage> the radius of the circle defining the rounding of the top-left corner of the element, specified as the percentages of the top and left sides of the border box.
... formal definition initial value0applies toall elementsinheritednopercentagesrefer to the corresponding dimension of the border boxcomputed valueas specifiedanimation typea length, percentage or calc(); formal syntax <outline-radius>where <outline-radius> = <length> | <percentage> examples the example below will not display the desired effect if you are viewing this in a browser other than firefox.
-moz-outline-radius-topright - CSS: Cascading Style Sheets
Web › CSS › -moz-outline-radius-topright
in mozilla applications, the -moz-outline-radius-topright css property can be used to round the top-right corner of an element's outline.
... values <length> the radius of the circle defining the curvature of the top and right edges of the element, specified as a css <length>.
... <percentage> the radius of the circle defining the rounding of the top-right corner of the element, specified as the percentages of the top and right sides of the border box.
... formal definition initial value0applies toall elementsinheritednopercentagesrefer to the corresponding dimension of the border boxcomputed valueas specifiedanimation typea length, percentage or calc(); formal syntax <outline-radius>where <outline-radius> = <length> | <percentage> examples html <p>look at this paragraph's top-right corner.</p> css p { margin: 5px; border: solid cyan; outline: dotted red; -moz-outline-radius-topright: 2em; } result the example above will not display the desired effect if you are viewing this in a browser other than firefox.
:-moz-focusring - CSS: Cascading Style Sheets
Web › CSS › :-moz-focusring
the :-moz-focusring css pseudo-class is a mozilla extension that is similar to the :focus pseudo-class, but it only matches an element if it's currently focused and a focus ring or other indicator should be drawn around it.
... if :-moz-focusring matches, then :focus also matches, but the converse is not always true: it depends on whether the user agent has focus ring drawing enabled and how the element was focused.
... note: developers tend to use :-moz-focusring to differentiate between the focus state when the user focuses an element via a mouse click versus keyboard tabbing.
... it is also potentially useful if you are creating a custom element and you want to change its style based on its behavior.
::-webkit-progress-bar - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-progress-bar
the ::-webkit-progress-bar css pseudo-element represents the entire bar of a <progress> element.
... normally it's only visible as the unfilled portion of the bar, since by default it's rendered below the ::-webkit-progress-value pseudo-element.
... it is a child of the ::-webkit-progress-inner-element pseudo-element and the parent of the ::-webkit-progress-value pseudo-element.
... note: for ::-webkit-progress-value to take effect, appearance needs to be set to none on the <progress> element.
::-webkit-scrollbar - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-scrollbar
the ::-webkit-scrollbar css pseudo-element affects the style of the scrollbar of an element.
... css scrollbar selectors you can use the following pseudo elements to customize various parts of the scrollbar for webkit browsers: ::-webkit-scrollbar — the entire scrollbar.
... ::-webkit-resizer — the draggable resizing handle that appears at the bottom corner of some elements.
... proin at nulla elementum, consectetur ex eget, commodo ante.
::selection - CSS: Cascading Style Sheets
Web › CSS › ::selection
the ::selection css pseudo-element applies styles to the part of a document that has been highlighted by the user (such as clicking and dragging the mouse across text).
...(wcag defines large text as between 18.66px and 24px and bold, or 24px or larger.) webaim: color contrast checker mdn understanding wcag, guideline 1.4 explanations understanding success criterion 1.4.3 | w3c understanding wcag 2.0 specifications specification status comment css pseudo-elements level 4the definition of '::selection' in that specification.
... note: ::selection was in drafts of css selectors level 3, but it was removed in the candidate recommendation phase because its was under-specified (especially with nested elements) and interoperability wasn't achieved (based on discussion in the w3c style mailing list).
... it returned in pseudo-elements level 4.
:active - CSS: Cascading Style Sheets
Web › CSS › :active
the :active css pseudo-class represents an element (such as a button) that is being activated by the user.
... /* selects any <a> that is being activated */ a:active { color: red; } the :active pseudo-class is commonly used on <a> and <button> elements.
... other common targets of this pseudo-class include elements that contain an activated element, and form elements that are being activated through their associated <label>.
...</p> css a:link { color: blue; } /* unvisited links */ a:visited { color: purple; } /* visited links */ a:hover { background: yellow; } /* hovered links */ a:active { color: red; } /* active links */ p:active { background: #eee; } /* active paragraphs */ result active form elements html <form> <label for="my-button">my button: </label> <button id="my-button" type="button">try clicking me or my label!</button> </form> css form :active { color: red; } form button { background: white; } result specifications specification status comment html living standardthe definition of ':active' in that specification.
:any-link - CSS: Cascading Style Sheets
Web › CSS › :any-link
the :any-link css pseudo-class selector represents an element that acts as the source anchor of a hyperlink, independent of whether it has been visited.
... in other words, it matches every <a>, <area>, or <link> element that has an href attribute.
... thus, it matches all elements that match :link or :visited.
... /* selects any element that would be matched by :link or :visited */ :any-link { color: green; } syntax :any-link examples html <a href="https://example.com">external link</a><br> <a href="#">internal target link</a><br> <a>placeholder link (won't get styled)</a> css a:any-link { border: 1px solid blue; color: orange; } /* webkit browsers */ a:-webkit-any-link { border: 1px solid blue; color: orange; } result specifications specification status comment selectors level 4the definition of ':any-link' in that specification.
:disabled - CSS: Cascading Style Sheets
Web › CSS › :disabled
the :disabled css pseudo-class represents any disabled element.
... an element is disabled if it can't be activated (selected, clicked on, typed into, etc.) or accept focus.
... the element also has an enabled state, in which it can be activated or accept focus.
...xt" placeholder="name" disabled> <input type="text" placeholder="address" disabled> <input type="text" placeholder="zip code" disabled> </fieldset> </form> css input[type="text"]:disabled { background: #ccc; } javascript // wait for the page to finish loading document.addeventlistener('domcontentloaded', function () { // attach `change` event listener to checkbox document.getelementbyid('billing-checkbox').onchange = togglebilling; }, false); function togglebilling() { // select the billing text fields var billingitems = document.queryselectorall('#billing input[type="text"]'); // toggle the billing text fields for (var i = 0; i < billingitems.length; i++) { billingitems[i].disabled = !billingitems[i].disabled; } } result specifications specifi...
:enabled - CSS: Cascading Style Sheets
Web › CSS › :enabled
the :enabled css pseudo-class represents any enabled element.
... an element is enabled if it can be activated (selected, clicked on, typed into, etc.) or accept focus.
... the element also has a disabled state, in which it can't be activated or accept focus.
...this helps the user understand which elements can be interacted with.
:first-of-type - CSS: Cascading Style Sheets
Web › CSS › :first-of-type
the :first-of-type css pseudo-class represents the first element of its type among a group of sibling elements.
... /* selects any <p> that is the first element of its type among its siblings */ p:first-of-type { color: red; } note: as originally defined, the selected element had to have a parent.
... syntax :first-of-type examples styling the first paragraph html <h2>heading</h2> <p>paragraph 1</p> <p>paragraph 2</p> css p:first-of-type { color: red; font-style: italic; } result nested elements this example shows how nested elements can also be targeted.
... working draft matching elements are not required to have a parent.
:focus-visible - CSS: Cascading Style Sheets
Web › CSS › :focus-visible
the :focus-visible pseudo-class applies while an element matches the :focus pseudo-class and the ua (user agent) determines via heuristics that the focus should be made evident on the element.
...note the difference in behavior from elements styled with :focus.
...nly">:focus only</button><br> <input class="focus-visible-only" value=":focus-visible only"><br> <button class="focus-visible-only">:focus-visible only</button> input, button { margin: 10px; } .focus-only:focus { outline: 2px solid black; } .focus-visible-only:focus-visible { outline: 4px dashed darkorange; } selectively showing the focus indicator a custom control, such as a custom element button, can use :focus-visible to selectively apply a focus indicator only on keyboard-focus.
...for users with cognitive concerns, or who are less technologically literate, this lack of consistent behavior for interactive elements may be confusing.
:focus - CSS: Cascading Style Sheets
Web › CSS › :focus
the :focus css pseudo-class represents an element (such as a form input) that has received focus.
... it is generally triggered when the user clicks or taps on an element or selects it with the keyboard's tab key.
... /* selects any <input> when focused */ input:focus { color: red; } note: this pseudo-class applies only to the focused element itself.
... use :focus-within if you want to select an element that contains a focused element.
:in-range - CSS: Cascading Style Sheets
Web › CSS › :in-range
the :in-range css pseudo-class represents an <input> element whose current value is within the range limits specified by the min and max attributes.
... note: this pseudo-class only applies to elements that have (and can take) a range limitation.
... in the absence of such a limitation, the element can neither be "in-range" nor "out-of-range." syntax :in-range examples html <form action="" id="form1"> <ul>values between 1 and 10 are valid.
... living standard defines when :in-range matches elements in html.
:last-of-type - CSS: Cascading Style Sheets
Web › CSS › :last-of-type
the :last-of-type css pseudo-class represents the last element of its type among a group of sibling elements.
... /* selects any <p> that is the last element of its type among its siblings */ p:last-of-type { color: lime; } note: as originally defined, the selected element had to have a parent.
... syntax :last-of-type examples styling the last paragraph html <h2>heading</h2> <p>paragraph 1</p> <p>paragraph 2</p> css p:last-of-type { color: red; font-style: italic; } result nested elements this example shows how nested elements can also be targeted.
... working draft matching elements are not required to have a parent.
:link - CSS: Cascading Style Sheets
Web › CSS › :link
the :link css pseudo-class represents an element that has not yet been visited.
... it matches every unvisited <a>, <area>, or <link> element that has an href attribute.
... note: use :any-link to select an element independent of whether it has been visited or not.
... recommendation lift the restriction to only apply it for <a> element.
:nth-last-of-type() - CSS: Cascading Style Sheets
Web › CSS › :nth-last-of-type
the :nth-last-of-type() css pseudo-class matches elements of a given type, based on their position among a group of siblings, counting from the end.
... /* selects every fourth <p> element among any group of siblings, counting backwards from the last one */ p:nth-last-of-type(4n) { color: lime; } note: this pseudo-class is essentially the same as :nth-of-type, except it counts items backwards from the end, not forwards from the beginning.
... syntax the nth-last-of-type pseudo-class is specified with a single argument, which represents the pattern for matching elements, counting from the end.
... working draft matching elements are not required to have a parent.
:nth-of-type() - CSS: Cascading Style Sheets
Web › CSS › :nth-of-type
the :nth-of-type() css pseudo-class matches elements of a given type (tag name), based on their position among a group of siblings.
... /* selects every fourth <p> element among any group of siblings */ p:nth-of-type(4n) { color: lime; } syntax the nth-of-type pseudo-class is specified with a single argument, which represents the pattern for matching elements.
... formal syntax :nth-of-type( <nth> )where <nth> = <an-plus-b> | even | odd examples basic example html <div> <div>this element isn't counted.</div> <p>1st paragraph.</p> <p>2nd paragraph.</p> <div>this element isn't counted.</div> <p>3rd paragraph.</p> <p class="fancy">4th paragraph.</p> </div> css /* odd paragraphs */ p:nth-of-type(2n+1) { color: red; } /* even paragraphs */ p:nth-of-type(2n) { color: blue; } /* first paragraph */ p:nth-of-type(1) { font-weight: bold; } /* this has no effect, as the .fancy class is only on the 4th p element, not the 1st */ p.fancy:nth-of-type(1) { text-decoration: underline; } result specifications specification status comment selector...
... working draft matching elements are not required to have a parent.
:only-child - CSS: Cascading Style Sheets
Web › CSS › :only-child
the :only-child css pseudo-class represents an element without any siblings.
... /* selects each <p>, but only if it is the */ /* only child of its parent */ p:only-child { background-color: lime; } note: as originally defined, the selected element had to have a parent.
... <div>i am an only child.</div> </div> <div> <div>i am the 1st sibling.</div> <div>i am the 2nd sibling.</div> <div>i am the 3rd sibling, <div>but this is an only child.</div></div> </div> css div:only-child { color: red; } div { display: inline-block; margin: 6px; outline: 1px solid; } result a list example html <ol> <li>first <ul> <li>this list has just one element.</li> </ul> </li> <li>second <ul> <li>this list has three elements.</li> <li>this list has three elements.</li> <li>this list has three elements.</li> </ul> </li> </ol> css li li { list-style-type: disc; } li:only-child { color: red; list-style-type: square; } result specifications specification status comment selector...
... working draft matching elements are not required to have a parent.
:only-of-type - CSS: Cascading Style Sheets
Web › CSS › :only-of-type
the :only-of-type css pseudo-class represents an element that has no siblings of the same type.
... /* selects each <p>, but only if it is the */ /* only <p> element inside its parent */ p:only-of-type { background-color: lime; } note: as originally defined, the selected element had to have a parent.
... syntax :only-of-type examples styling elements with no siblings of the same type html <main> <div>i am `div` #1.</div> <p>i am the only `p` among my siblings.</p> <div>i am `div` #2.</div> <div>i am `div` #3.
... working draft matching elements are not required to have a parent.
:out-of-range - CSS: Cascading Style Sheets
Web › CSS › :out-of-range
the :out-of-range css pseudo-class represents an <input> element whose current value is outside the range limits specified by the min and max attributes.
... note: this pseudo-class only applies to elements that have (and can take) a range limitation.
... in the absence of such a limitation, the element can neither be "in-range" nor "out-of-range." syntax :out-of-range examples html <form action="" id="form1"> <p>values between 1 and 10 are valid.</p> <ul> <li> <input id="value1" name="value1" type="number" placeholder="1 to 10" min="1" max="10" value="12"> <label for="value1">your value is </label> </li> </ul> </form> css li { list-style: none; margin-bottom: 1em; } input { border: 1px solid black; } input:in-range { background-color: rgba(0, 255, 0, 0.25); } input:out-of-range { background-color: rgba(255, 0, 0, 0.25); border: 2px solid red; } input:in-range + label::after { content: 'okay.'; } input:out-of-range + label::after { content: 'out of range!'; } result specifications ...
... living standard defines when :out-of-range matches elements in html.
:target - CSS: Cascading Style Sheets
Web › CSS › :target
the :target css pseudo-class represents a unique element (the target element) with an id matching the url's fragment.
... /* selects an element with an id matching the current url's fragment */ :target { border: 2px solid black; } for example, the following url has a fragment (denoted by the # sign) that points to an element called section2: http://www.example.com/index.html#section2 the following element would be selected by a :target selector when the current url is equal to the above: <section id="section2">example</section> syntax :target examples a table of contents the :target pseudo-class can be used to highlight the portion of a page that has been linked to from a table of contents.
...isn't that delightful?</p> css p:target { background-color: gold; } /* add a pseudo-element inside the target element */ p:target::before { font: 70% sans-serif; content: "►"; color: limegreen; margin-right: .25em; } /* style italic elements within the target element */ p:target i { color: red; } result pure-css lightbox you can use the :target pseudo-class to create a lightbox without using any javascript.
... this technique relies on the ability of anchor links to point to elements that are initially hidden on the page.
Coordinate systems - CSS: Cascading Style Sheets
Web › CSS › CSSOM View › Coordinate systems
offset coordinates specified using the "offset" model use the top-left corner of the element being examined, or on which an event has occurred.
...that means that a given point in an element within the document will keep the same coordinates in the page model unless the element moves (either directly by changing its position or indirectly by adding or resizing other content).
... let inner = document.queryselector(".inner"); let log = document.queryselector(".log"); function setcoords(e, type) { let idx = type + "x"; let idy = type + "y"; document.getelementbyid(idx).innertext = e[idx]; document.getelementbyid(idy).innertext = e[idy]; } a reference to the <div> inside the inner box which contains the paragraphs that will show the coordinate information is fetched into log.
...note that within the <div> with the id "log", we have a paragraph for each coordinate system, with span used for each of the elements to receive and display the coordinates in each model.
Resizing background images with background-size - CSS: Cascading Style Sheets
Web › CSS › CSS Backgrounds and Borders › Resizing background images
the background-size css property lets you resize the background image of an element, overriding the default behavior of tiling the image at its full size by specifying the width and/or height of the image.
...we want (for some reason likely involving horrifyingly bad site design) to tile four copies of this image into a 300x300-pixel element.
... html <div class="bgsizecontain"> <p>try resizing this element!</p> </div> css .bgsizecontain { background-image: url(https://www.mozilla.org/media/img/logos/firefox/logo-quantum.9c5e96634f92.png); background-size: contain; width: 160px; height: 160px; border: 2px solid; color: pink; resize: both; overflow: scroll; } result cover the cover value specifies that the background image should be sized so that it is as small as possible whil...
... html <div class="bgsizecover"> <p>try resizing this element!</p> </div> css .bgsizecover { background-image: url(https://www.mozilla.org/media/img/logos/firefox/logo-quantum.9c5e96634f92.png); background-size: cover; width: 160px; height: 160px; border: 2px solid; color: pink; resize: both; overflow: scroll; } result see also background-size background scaling of svg backgrounds ...
CSS Backgrounds and Borders - CSS: Cascading Style Sheets
Web › CSS › CSS Backgrounds and Borders
(additionally, element boxes can be decorated with a shadow.) reference css properties background background-attachment background-clip background-color background-image background-origin background-position background-position-x background-position-y background-repeat background-size border border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-collapse border-color border-image border-image-outset border-image-repeat border-image-slice border-i...
...der-left border-left-color border-left-style border-left-width border-radius border-right border-right-color border-right-style border-right-width border-style border-top border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-width box-shadow tools using multiple backgrounds explains how to set one or more backgrounds on an element.
... applying color to html elements using css an overview of how css color can be used in html, including for borders.
... box-shadow generator this interactive tool lets you visually create shadows behind elements (the box-shadow property).
Mastering margin collapsing - CSS: Cascading Style Sheets
Web › CSS › CSS Box Model › Mastering margin collapsing
note that the margins of floating and absolutely positioned elements never collapse.
...this applies to both adjacent elements and nested elements.
... examples html <p>the bottom margin of this paragraph is collapsed …</p> <p>… with the top margin of this paragraph, yielding a margin of <code>1.2rem</code> in between.</p> <div>this parent element contains two paragraphs!
... <p>this paragraph has a <code>.4rem</code> margin between it and the text above.</p> <p>my bottom margin collapses with my parent, yielding a bottom margin of <code>2rem</code>.</p> </div> <p>i am <code>2rem</code> below the element above.</p> css div { margin: 2rem 0; background: lavender; } p { margin: .4rem 0 1.2rem 0; background: yellow; } result specifications specification status comment css level 2 (revision 1)the definition of 'margin collapsing' in that specification.
Basic Concepts of Multicol - CSS: Cascading Style Sheets
Web › CSS › CSS Columns › Basic Concepts of Multicol
key concepts and terminology multicol is unlike any of the other layout methods we have in css in that it fragments the content, including all descendent elements, into columns.
... the properties defined by the specification are: column-width column-count columns column-rule-color column-rule-style column-rule-width column-rule column-span column-fill column-gap by adding column-count or column-width to an element, that element becomes a multi-column container, or multicol container for short.
... in the below example we use the column-count property to create three columns on the .container element.
...this is because a multicol container creates a new block formatting context (bfc) which means margins on child elements do not collapse with any margin on the container.
Cross-browser Flexbox mixins - CSS: Cascading Style Sheets
Web › CSS › CSS Flexible Box Layout › Mixins
flexbox containers using the display property's flex value causes an element to generate a block-level flex container box.
... the inline-flex value causes an element to generate an inline-level flex container box.
...when an element is a flex item, flex is consulted instead of the main size property to determine the main size of the element.
... if an element is not a flex item, flex has no effect.
Flow Layout and Writing Modes - CSS: Cascading Style Sheets
Web › CSS › CSS Flow Layout › Flow Layout and Writing Modes
if you want to change your page, or part of your page, to vertical-lr then you can set writing-mode: vertical-lr on the element and this will change the direction of the blocks and therefore the inline direction as well.
... replaced elements replaced elements such as images will not change their orientation based on the writing-mode property.
... however, replaced elements such as form controls which include text, should match the writing mode in use.
...css is making this easier by way of introducing logical properties and values so that when working in a vertical writing mode sizing can be based on element's inline and block size.
CSS Grid Layout and Progressive Enhancement - CSS: Cascading Style Sheets
Web › CSS › CSS Grid Layout › CSS Grid and Progressive Enhancement
you could start by simply enhancing elements in your design with grid, that could otherwise display using an older method.
... other values of display when an element has a parent set to display: grid it is blockified, as defined in the css display specification.
...therefore, if you use display: table-cell without any parent element set to display-table, an anonymous table wrapper is created around any adjacent cells, just as if you had wrapped them in a div or other element set to display: table.
... floated elements as we have already seen, float and also clear have no effect on a grid item.
Relationship of grid layout to other layout methods - CSS: Cascading Style Sheets
Web › CSS › CSS Grid Layout › Relationship of Grid Layout
grid and absolutely positioned elements grid interacts with absolutely positioned elements, which can be useful if you want to position an item inside a grid or grid area.
...the positioning context will be whatever element creates a positioning context as is common to other layout methods.
...the contents value of the display property is a new value that is described in the display specification as follows: “the element itself does not generate any boxes, but its children and pseudo-elements still generate boxes as normal.
... for the purposes of box generation and layout, the element must be treated as if it had been replaced with its children and pseudo-elements in the document tree.” if you set an item to display: contents the box it would normally create disappears, and the boxes of the child elements appear as if they have risen up a level.
Using CSS counters - CSS: Cascading Style Sheets
Web › CSS › CSS Lists and Counters › Using CSS counters
the generated text is the value of the innermost counter of the given name in scope at the given pseudo-element.the counter is rendered in the specified style (decimal by default).
...the generated text is the value of all counters with the given name in scope at the given pseudo-element, from outermost to innermost, separated by the specified string.
...of section counter, and a colon before the content of each h3 */ } html <h3>introduction</h3> <h3>body</h3> <h3>conclusion</h3> result nesting counters a css counter can be especially useful for making outlined lists, because a new instance of the counter is automatically created in child elements.
... example of a nested counter css ol { counter-reset: section; /* creates a new instance of the section counter with each ol element */ list-style-type: none; } li::before { counter-increment: section; /* increments only this instance of the section counter */ content: counters(section, ".") " "; /* combines the values of all instances of the section counter, separated by a period */ } html <ol> <li>item</li> <!-- 1 --...
Understanding CSS z-index - CSS: Cascading Style Sheets
Web › CSS › CSS Positioning › Understanding z index
in the most basic cases, html pages can be considered two-dimensional, because text, images, and other elements are arranged on the page without overlapping.
... in this case, there is a single rendering flow, and all elements are aware of the space taken by others.
...however, when z-index is applied to complex hierarchies of html elements, its behaviour can be hard to understand or predict.
... stacking with floated blocks: how floating elements are handled with stacking.
Basic Shapes - CSS: Cascading Style Sheets
Web › CSS › CSS Shapes › Basic Shapes
the floated element has 20 pixels of padding, border and margin applied, and the shapes inspector highlights these reference boxes.
...the below css creates a rectangular shape inset from the reference box of the floated element 20 pixels from the top and bottom and 10 pixels from the left and right, with a border-radius value of 10 pixels.
...so, the above rules could also be described as: .shape { float: left; shape-outside: inset(20px 10px round 10px); } in the example below we have an inset() shape used to pull content over the floated element.
... the keyword values of closest-side and farthest-side are useful to create a quick ellipse based on the size of the floated element reference box.
Shapes from box values - CSS: Cascading Style Sheets
Web › CSS › CSS Shapes › From box values
in all of the examples below i am using an element which has padding, a border, and a margin defined in order that you can see the different ways in which content will flow.
... margin-box the margin-box is the shape defined by the outside margin edge and includes the corner radius of the shape, should border-radius have been used in defining the element.
...as the element has a margin, you can see that the content is flowing around the circular shape and the margin applied to it.
...in my final example of this section, i have floated two elements left and right, giving each a border-radius of 100% in the direction closest to the text.
Layout mode - CSS: Cascading Style Sheets
Web › CSS › Layout mode
there are several of them: normal flow — all elements are part of normal flow until you do something to take them out of it.
... positioned layout, designed for positioning elements without much interaction with other elements.
... grid layout, designed for laying out elements relative to a fixed grid.
...most of them apply to one or two of them and have no effect if they are set on an element participating in another layout mode.
Using media queries - CSS: Cascading Style Sheets
Web › CSS › Media Queries › Using media queries
to target specific media for the <style>, <link>, <source>, and other html elements with the media= attribute.
... name summary notes any-hover does any available input mechanism allow the user to hover over elements?
... height height of the viewport hover does the primary input mechanism allow the user to hover over elements?
...this example applies styles when the user's primary input mechanism (such as a mouse) can hover over elements: @media (hover: hover) { ...
Mozilla CSS extensions - CSS: Cascading Style Sheets
Web › CSS › Mozilla Extensions
mozilla applications such as firefox support a number of special mozilla extensions to css, including properties, values, pseudo-elements and pseudo-classes, at-rules, and media queries.
...some of them apply only to xul elements.
...r-textfield spinner-upbutton statusbar statusbarpanel tab tabpanels tab-scroll-arrow-back tab-scroll-arrow-forward textfield textfield-multiline toolbar toolbarbutton-dropdown toolbox tooltip treeheadercell treeheadersortarrow treeitem treetwisty treetwistyopen treeview window background-image gradients -moz-linear-gradient -moz-radial-gradient elements -moz-element sub-images -moz-image-rect() border-color -moz-use-text-colorobsolete since gecko 52 (removed in bug 1306214); use currentcolor instead.
... -moz-urdu overflow -moz-scrollbars-none -moz-scrollbars-horizontal -moz-scrollbars-vertical -moz-hidden-unscrollable text-align -moz-center -moz-left -moz-right text-decoration -moz-anchor-decoration -moz-user-select -moz-all -moz-none width, min-width, and max-width -moz-min-content -moz-fit-content -moz-max-content -moz-available pseudo-elements and pseudo-classes a – d ::-moz-anonymous-block eg@:- bug 331432 ::-moz-anonymous-positioned-block :-moz-any :-moz-any-link [matches :link and :visited] :-moz-broken ::-moz-canvas ::-moz-color-swatch ::-moz-cell-content :-moz-drag-over f – i :-moz-first-node ::-moz-focus-inner ::-moz-focus-outer :-moz-focusring :-moz-full-screen :-moz-full-screen-ancestor :-moz...
Pseudo-classes - CSS: Cascading Style Sheets
Web › CSS › Pseudo-classes
a css pseudo-class is a keyword added to a selector that specifies a special state of the selected element(s).
... /* any button over which the user's pointer is hovering */ button:hover { color: blue; } pseudo-classes let you apply a style to an element not only in relation to the content of the document tree, but also in relation to external factors like the history of the navigator (:visited, for example), the status of its content (like :checked on certain form elements), or the position of the mouse (like :hover, which lets you know if the mouse is over an element or not).
... note: in contrast to pseudo-classes, pseudo-elements can be used to style a specific part of an element.
... html living standard living standard defines when particular selectors match html elements.
Type selectors - CSS: Cascading Style Sheets
Web › CSS › Type selectors
the css type selector matches elements by node name.
... in other words, it selects all elements of the given type within a document.
... /* all <a> elements.
... */ a { color: red; } syntax element { style properties } examples css span { background-color: skyblue; } html <span>here's a span with some text.</span> <p>here's a p with some text.</p> <span>here's a span with more text.</span> result specifications specification status comment selectors level 4the definition of 'type (tag name) selector' in that specification.
Universal selectors - CSS: Cascading Style Sheets
Web › CSS › Universal selectors
the css universal selector (*) matches elements of any type.
... /* selects all elements */ * { color: green; } beginning with css3, the asterisk may be used in combination with namespaces: ns|* - matches all elements in namespace ns *|* - matches all elements |* - matches all elements without any declared namespace syntax * { style properties } the asterisk is optional with simple selectors.
... examples css * [lang^=en] { color: green; } *.warning { color: red; } *#maincontent { border: 1px solid blue; } .floating { float: left } /* automatically clear the next sibling after a floating element */ .floating + * { clear: left; } html <p class="warning"> <span lang="en-us">a green span</span> in a red paragraph.
... recommendation defines behavior regarding namespaces and adds hint that omitting the selector is allowed within pseudo-elements css level 2 (revision 1)the definition of 'universal selector' in that specification.
background-blend-mode - CSS: Cascading Style Sheets
Web › CSS › background-blend-mode
the background-blend-mode css property sets how an element's background images should blend with each other and with the element's background color.
... formal definition initial valuenormalapplies toall elements.
... in svg, it applies to container elements, graphics elements, and graphics referencing elements..
...on>difference</option> <option>exclusion</option> <option>hue</option> <option>saturation</option> <option>color</option> <option>luminosity</option> </select> #div { width: 300px; height: 300px; background: url('https://mdn.mozillademos.org/files/8543/br.png'),url('https://mdn.mozillademos.org/files/8545/tr.png'); background-blend-mode: screen; } document.getelementbyid("select").onchange = function(event) { document.getelementbyid("div").style.backgroundblendmode = document.getelementbyid("select").selectedoptions[0].innerhtml; } console.log(document.getelementbyid('div')); specifications specification status comment compositing and blending level 1the definition of 'background-blend-mode' in that specification.
background-position - CSS: Cascading Style Sheets
Web › CSS › background-position
a position defines an x/y coordinate, to place an item relative to the edges of an element's box.
... formal definition initial value0% 0%applies toall elements.
...] ]where <length-percentage> = <length> | <percentage> examples positioning background images each of these three examples uses the background property to create a yellow, rectangular element containing a star image.
...the third example illustrates how to specify positions for two different background images within one element.
background-repeat - CSS: Cascading Style Sheets
Web › CSS › background-repeat
by default, the repeated images are clipped to the size of the element, but they can be scaled to fit (using round) or evenly distributed from end to end (using space).
...the first and last images are pinned to either side of the element, and whitespace is distributed evenly between the images.
... formal definition initial valuerepeatapplies toall elements.
... candidate recommendation adds support for multiple background images, the two-value syntax allowing distinct repetition behavior for the horizontal and vertical directions, the space and round keywords, and for backgrounds on inline-level elements by precisely defining the background painting area.
border-block-start-width - CSS: Cascading Style Sheets
Web › CSS › border-block-start-width
the border-block-start-width css property defines the width of the logical block-start border of an element, which maps to a physical border width depending on the element's writing mode, directionality, and text orientation.
... syntax /* <'border-width'> values */ border-block-start-width: 5px; border-block-start-width: thick; related properties are border-block-end-width, border-inline-start-width, and border-inline-end-width, which define the other border widths of the element.
... initial valuemediumapplies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueabsolute length; 0 if the border style is none or hiddenanimation typea length values <'border-width'> the width of the border.
... formal definition initial valuemediumapplies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueabsolute length; 0 if the border style is none or hiddenanimation typea length formal syntax <'border-top-width'> examples border width with vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 1px solid blue; border-block-start-width: 5px; } results specifications specification status comment css logical properties and values level 1the definition of 'border-block-start-width' in that specification.
border-bottom-left-radius - CSS: Cascading Style Sheets
Web › CSS › border-bottom-left-radius
the border-bottom-left-radius css property rounds the bottom-left corner of an element by specifying the radius (or the radius of the semi-major and semi-minor axes) of the ellipse defining the curvature of the corner.
... note: if the value of this property is not set in a border-radius shorthand property that is applied to the element after the border-bottom-left-radius css property, the value of this property is then reset to its initial value by the shorthand property.
... formal definition initial value0applies toall elements; but user agents are not required to apply to table and inline-table elements when border-collapse is collapse.
... the behavior on internal table elements is undefined for the moment..
border-bottom-right-radius - CSS: Cascading Style Sheets
Web › CSS › border-bottom-right-radius
the border-bottom-right-radius css property rounds the top-left corner of an element by specifying the radius (or the radius of the semi-major and semi-minor axes) of the ellipse defining the curvature of the corner.
... note: if the value of this property is not set in a border-radius shorthand property that is applied to the element after the border-bottom-right-radius css property, the value of this property is then reset to its initial value by the shorthand property.
... formal definition initial value0applies toall elements; but user agents are not required to apply to table and inline-table elements when border-collapse is collapse.
... the behavior on internal table elements is undefined for the moment..
border-image-source - CSS: Cascading Style Sheets
Web › CSS › border-image-source
the border-image-source css property sets the source image used to create an element's border image.
... formal definition initial valuenoneapplies toall elements, except internal table elements when border-collapse is collapse.
... it also applies to ::first-letter.inheritednocomputed valuenone or the image with its uri made absoluteanimation typediscrete formal syntax none | <image>where <image> = <url> | <image()> | <image-set()> | <element()> | <paint()> | <cross-fade()> | <gradient>where <image()> = image( <image-tags>?
...)<image-set()> = image-set( <image-set-option># )<element()> = element( <id-selector> )<paint()> = paint( <ident>, <declaration-value>?
border-inline-end-color - CSS: Cascading Style Sheets
Web › CSS › border-inline-end-color
the border-inline-end-color css property defines the color of the logical inline-end border of an element, which maps to a physical border color depending on the element's writing mode, directionality, and text orientation.
... syntax border-inline-end-color: rebeccapurple; border-inline-end-color: #663399; related properties are border-block-start-color, border-block-end-color, and border-inline-start-color, which define the other border colors of the element.
... initial valuecurrentcolorapplies toall elementsinheritednocomputed valuecomputed coloranimation typea color values <'color'> the color of the border.
... formal definition initial valuecurrentcolorapplies toall elementsinheritednocomputed valuecomputed coloranimation typea color formal syntax <'border-top-color'> examples html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 10px solid blue; border-inline-end-color: red; } specifications specification status comment css logical properties and values level 1the definition of 'border-inline-end-color' in that specification.
border-inline-end-width - CSS: Cascading Style Sheets
Web › CSS › border-inline-end-width
the border-inline-end-width css property defines the width of the logical inline-end border of an element, which maps to a physical border width depending on the element's writing mode, directionality, and text orientation.
... syntax /* <'border-width'> values */ border-inline-end-width: 2px; border-inline-end-width: thick; related properties are border-block-start-width, border-block-end-width, and border-inline-start-width, which define the other border widths of the element.
... initial valuemediumapplies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueabsolute length; 0 if the border style is none or hiddenanimation typea length values <'border-width'> the width of the border.
... formal definition initial valuemediumapplies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueabsolute length; 0 if the border style is none or hiddenanimation typea length formal syntax <'border-top-width'> examples applying a border with vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 1px solid blue; border-inline-end-width: 5px; } results specifications specification status comment css logical properties and values level 1the definition of 'border-inline-end-width' in that specification.
border-inline-end - CSS: Cascading Style Sheets
Web › CSS › border-inline-end
constituent properties this property is a shorthand for the following css properties: border-inline-end-color border-inline-end-style border-inline-end-width syntax border-inline-end: 1px; border-inline-end: 2px dashed; border-inline-end: medium dashed blue; the physical border to which border-inline-end maps depends on the element's writing mode, directionality, and text orientation.
... related properties are border-block-start, border-block-end, and border-inline-start, which define the other borders of the element.
...of the properties of the shorthand:border-width: as each of the properties of the shorthand:border-top-width: mediumborder-right-width: mediumborder-bottom-width: mediumborder-left-width: mediumborder-style: as each of the properties of the shorthand:border-top-style: noneborder-right-style: noneborder-bottom-style: noneborder-left-style: nonecolor: varies from one browser to anotherapplies toall elementsinheritednocomputed valueas each of the properties of the shorthand:border-width: as each of the properties of the shorthand:border-bottom-width: the absolute length or 0 if border-bottom-style is none or hiddenborder-left-width: the absolute length or 0 if border-left-style is none or hiddenborder-right-width: the absolute length or 0 if border-right-style is none or hiddenborder-top-width: the ...
...of the properties of the shorthand:border-width: as each of the properties of the shorthand:border-top-width: mediumborder-right-width: mediumborder-bottom-width: mediumborder-left-width: mediumborder-style: as each of the properties of the shorthand:border-top-style: noneborder-right-style: noneborder-bottom-style: noneborder-left-style: nonecolor: varies from one browser to anotherapplies toall elementsinheritednocomputed valueas each of the properties of the shorthand:border-width: as each of the properties of the shorthand:border-bottom-width: the absolute length or 0 if border-bottom-style is none or hiddenborder-left-width: the absolute length or 0 if border-left-style is none or hiddenborder-right-width: the absolute length or 0 if border-right-style is none or hiddenborder-top-width: the ...
border-inline-start-style - CSS: Cascading Style Sheets
Web › CSS › border-inline-start-style
the border-inline-start-style css property defines the style of the logical inline start border of an element, which maps to a physical border style depending on the element's writing mode, directionality, and text orientation.
... syntax /* <'border-style'> values */ border-inline-start-style: dashed; border-inline-start-style: dotted; border-inline-start-style: groove; related properties are border-block-start-style, border-block-end-style, and border-inline-end-style, which define the other border styles of the element.
... initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete values <'border-style'> the line style of the border.
... formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <'border-top-style'> examples html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 5px solid blue; border-inline-start-style: dashed; } specifications specification status comment css logical properties and values level 1the definition of 'border-inline-start-style' in that specification.
border-style - CSS: Cascading Style Sheets
Web › CSS › border-style
the border-style shorthand css property sets the line style for all four sides of an element's border.
... inset displays a border that makes the element appear embedded.
... outset displays a border that makes the element appear embossed.
... formal definition initial valueas each of the properties of the shorthand:border-top-style: noneborder-right-style: noneborder-bottom-style: noneborder-left-style: noneapplies toall elements.
border-top-left-radius - CSS: Cascading Style Sheets
Web › CSS › border-top-left-radius
the border-top-left-radius css property rounds the top-left corner of an element by specifying the radius (or the radius of the semi-major and semi-minor axes) of the ellipse defining the curvature of the corner.
... note: if the value of this property is not set in a border-radius shorthand property that is applied to the element after the border-top-left-radius css property, the value of this property is then reset to its initial value by the shorthand property.
... formal definition initial value0applies toall elements; but user agents are not required to apply to table and inline-table elements when border-collapse is collapse.
... the behavior on internal table elements is undefined for the moment..
border-top-right-radius - CSS: Cascading Style Sheets
Web › CSS › border-top-right-radius
the border-top-right-radius css property rounds the top-right corner of an element by specifying the radius (or the radius of the semi-major and semi-minor axes) of the ellipse defining the curvature of the corner.
... note: if the value of this property is not set in a border-radius shorthand property that is applied to the element after the border-top-right-radius css property, the value of this property is then reset to its initial value by the shorthand property.
... formal definition initial value0applies toall elements; but user agents are not required to apply to table and inline-table elements when border-collapse is collapse.
... the behavior on internal table elements is undefined for the moment..
box-align - CSS: Cascading Style Sheets
Web › CSS › box-align
the box-align css property specifies how an element aligns its contents across its layout in a perpendicular direction.
... /* keyword values */ box-align: start; box-align: center; box-align: end; box-align: baseline; box-align: stretch; /* global values */ box-lines: inherit; box-lines: initial; box-lines: unset; the direction of layout depends on the element's orientation: horizontal or vertical.
... if the alignment is set using the element's align attribute, then the style is ignored.
... formal definition initial valuestretchapplies toelements with a css display value of box or inline-boxinheritednocomputed valueas specifiedanimation typediscrete formal syntax start | center | end | baseline | stretch examples setting box alignment <!doctype html> <html> <head> <title>css box-align example</title> <style> div.example { display: box; /* as specified */ display: -moz-box; /* mozilla */ display: -webkit-box; /* webkit */ /* make this box taller than the children, so there is room for the box-pack */ height: 400px; /* make this box wider than the children so there is room for the box-align */ width: 300px; /* children should be oriented vertically */ box-orient: vertical; /* as specified */ ...
box-orient - CSS: Cascading Style Sheets
Web › CSS › box-orient
the box-orient css property sets whether an element lays out its contents horizontally or vertically.
... description html dom elements lay out their contents along the inline-axis by default.
... this css property will only apply to html elements with a css display value of box or inline-box.
... formal definition initial valueinline-axis (horizontal in xul)applies toelements with a css display value of box or inline-boxinheritednocomputed valueas specifiedanimation typediscrete formal syntax horizontal | vertical | inline-axis | block-axis | inherit examples setting horizontal box orientation here, he box-orient property will cause the two <p> sections in the example to display in the same line.
break-inside - CSS: Cascading Style Sheets
Web › CSS › break-inside
/* keyword values */ break-inside: auto; break-inside: avoid; break-inside: avoid-page; break-inside: avoid-column; break-inside: avoid-region; /* global values */ break-inside: inherit; break-inside: initial; break-inside: unset; each possible break point (in other words, each element boundary) is affected by three properties: the break-after value of the previous element, the break-before value of the next element, and the break-inside value of the containing element.
...if more than one of them are such a break, the value of the element that appears the latest in the flow is used.
... once forced breaks have been applied, soft breaks may be added if needed, but not on element boundaries that resolve in a corresponding avoid value.
...a subset of values should be aliased as follows: page-break-inside break-inside auto auto avoid avoid formal definition initial valueautoapplies toblock-level elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax auto | avoid | avoid-page | avoid-column | avoid-region examples avoiding breaking inside a figure in the following example we have a container that contains an <h1> spanning all columns (achieved using column-span: all) and a series of paragraphs laid out in multiple columns using column-width: 200px.
color - CSS: Cascading Style Sheets
Web › CSS › color
the color css property sets the foreground color value of an element's text and text decorations, and sets the currentcolor value.
... for an overview of using color in html, see applying color to html elements using css.
... values <color> sets the color of the textual and decorative parts of the element.
... webaim: color contrast checker mdn understanding wcag, guideline 1.4 explanations understanding success criterion 1.4.3 | w3c understanding wcag 2.0 formal definition initial valuevaries from one browser to anotherapplies toall elements.
column-count - CSS: Cascading Style Sheets
Web › CSS › column-count
the column-count css property breaks an element's content into the specified number of columns.
... <integer> is a strictly positive <integer> describing the ideal number of columns into which the content of the element will be flowed.
... 12prefixed prefixed implemented with the vendor prefix: -webkit-firefox full support 52 full support 52 no support 1.5 — 74prefixed notes prefixed implemented with the vendor prefix: -moz-notes prior to version 37, multiple columns didn't work with display: table-caption elements.ie full support 10opera full support 11.1 full support 11.1 full support 15prefixed prefixed implemented with the vendor prefix: -webkit-safari full support 9 ...
... prefixed implemented with the vendor prefix: -webkit-firefox android full support 52 full support 52 full support 4prefixed notes prefixed implemented with the vendor prefix: -moz-notes prior to version 37, multiple columns didn't work with display: table-caption elements.opera android full support 11.1 full support 11.1 full support 14prefixed prefixed implemented with the vendor prefix: -webkit-safari ios full support 9 full support 9 ...
counter-set - CSS: Cascading Style Sheets
Web › CSS › counter-set
it manipulates the value of existing counters, and will only create new counters if there isn't already a counter of the given name on the element.
... <integer> the value to set the counter to on each occurrence of the element.
...if there isn't currently a counter of the given name on the element, the element will create a new counter of the given name with a starting value of 0 (though it may then immediately set or increment that value to something different).
... formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax [ <custom-ident> <integer>?
<display-legacy> - CSS: Cascading Style Sheets
Web › CSS › display-legacy
syntax valid <display-legacy> values: inline-block the element generates a block element box that will be flowed with surrounding content as if it were a single inline box (behaving much like a replaced element would).
...it behaves like an html <table> element, but as an inline box, rather than a block-level box.
... inline-flex the element behaves like an inline element and lays out its content according to the flexbox model.
... inline-grid the element behaves like an inline element and lays out its content according to the grid model.
drop-shadow() - CSS: Cascading Style Sheets
Web › CSS › filter-function › drop-shadow
the box-shadow property creates a rectangular shadow behind an element's entire box, while the drop-shadow() filter function creates a shadow that conforms to the shape (alpha channel) of the image itself.
...offset-x specifies the horizontal distance, where negative values place the shadow to the left of the element.
... offset-y specifies the vertical distance, where negative values place the shadow above the element.
... if both values are 0, the shadow is placed directly behind the element.
font-weight - CSS: Cascading Style Sheets
Web › CSS › font-weight
lighter one relative font weight lighter than the parent element.
... bolder one relative font weight heavier than the parent element.
... meaning of relative weights when lighter or bolder is specified, the below chart shows how the absolute font weight of the element is determined.
... mdn understanding wcag, guideline 1.4 explanations understanding success criterion 1.4.8 | w3c understanding wcag 2.0 formal definition initial valuenormalapplies toall elements.
isolation - CSS: Cascading Style Sheets
Web › CSS › isolation
the isolation css property determines whether an element must create a new stacking context.
... values auto a new stacking context is created only if one of the properties applied to the element requires it.
... formal definition initial valueautoapplies toall elements.
... in svg, it applies to container elements, graphics elements, and graphics referencing elements.inheritednocomputed valueas specifiedanimation typediscrete formal syntax auto | isolate examples forcing a new stacking context for an element html <div id="b" class="a"> <div id="d"> <div class="a c">auto</div> </div> <div id="e"> <div class="a c">isolate</div> </div> </div> css .a { background-color: rgb(0,255,0); } #b { width: 200px; height: 210px; } .c { width: 100px; height: 100px; border: 1px solid black; padding: 2px; mix-blend-mode: difference; } #d { isolation: auto; } #e { isolation: isolate; } result specifications specification status comment compositing and blending level 1the definition of 'isolation' in that s...
margin-bottom - CSS: Cascading Style Sheets
Web › CSS › margin-bottom
the margin-bottom css property sets the margin area on the bottom of an element.
... this property has no effect on non-replaced inline elements, such as <span> or <code>.
... formal definition initial value0applies toall elements, except elements with table display types other than table-caption, table and inline-table.
... recommendation removes its effect on inline elements.
margin-top - CSS: Cascading Style Sheets
Web › CSS › margin-top
the margin-top css property sets the margin area on the top of an element.
... this property has no effect on non-replaced inline elements, such as <span> or <code>.
... formal definition initial value0applies toall elements, except elements with table display types other than table-caption, table and inline-table.
... recommendation removes its effect on inline elements.
mask-position - CSS: Cascading Style Sheets
Web › CSS › mask-position
values <position> one to four values representing a 2d position regarding the edges of the element's box.
...note that the position can be set outside of the element's box.
... formal definition initial valuecenterapplies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednopercentagesrefer to size of mask painting area minus size of mask layer image (see the text for background-position)computed valueconsists of two keywords representing the origin and two offsets from that origin, each given as an absolute length (if given a <length>), otherwise as a percentage.animation typerepeatable list of simple list of length, percentage, or calc formal syntax <position>#where <position> = [ [ left | center | right ] | [ top | center | bottom ] | [ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ]?
...p</option> <option value="center">center</option> <option value="bottom">bottom</option> <option value="top right" selected>top right</option> <option value="center center">center center</option> <option value="bottom left">bottom left</option> <option value="10px 20px">10px 20px</option> <option value="60% 20%">60% 20%</option> </select> javascript var maskposition = document.getelementbyid("maskposition"); maskposition.addeventlistener("change", function (evt) { document.getelementbyid("masked").style.maskposition = evt.target.value; }); result specifications specification status comment css masking module level 1the definition of 'mask-position' in that specification.
mask-repeat - CSS: Cascading Style Sheets
Web › CSS › mask-repeat
e syntax: horizontal | vertical */ mask-repeat: repeat space; mask-repeat: repeat repeat; mask-repeat: round space; mask-repeat: no-repeat round; /* multiple values */ mask-repeat: space round, no-repeat; mask-repeat: round repeat, space, repeat-x; /* global values */ mask-repeat: inherit; mask-repeat: initial; mask-repeat: unset; by default, the repeated images are clipped to the size of the element, but they can be scaled to fit (using round) or evenly distributed from end to end (using space).
...the first and last images are pinned to either side of the element, and whitespace is distributed evenly between the images.
... formal definition initial valueno-repeatapplies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednocomputed valueconsists of two keywords, one per dimensionanimation typediscrete formal syntax <repeat-style>#where <repeat-style> = repeat-x | repeat-y | [ repeat | space | round | no-repeat ]{1,2} examples setting repeat for a single mask css #masked { width: 250px; height: 250px; ...
...0px; } html content <div id="masked"> </div> <select id="repetition"> <option value="repeat-x">repeat-x</option> <option value="repeat-y">repeat-y</option> <option value="repeat" selected>repeat</option> <option value="space">space</option> <option value="round">round</option> <option value="no-repeat">no-repeat</option> </select> javascript content var repetition = document.getelementbyid("repetition"); repetition.addeventlistener("change", function (evt) { document.getelementbyid("masked").style.maskrepeat = evt.target.value; }); result multiple mask image support you can specify a different <repeat-style> for each mask image, separated by commas: .examplethree { mask-image: url('mask1.png'), url('mask2.png'); mask-repeat: repeat-x, repeat-y; } each image is m...
mask-type - CSS: Cascading Style Sheets
Web › CSS › mask-type
the mask-type css property sets whether an svg <mask> element is used as a luminance or an alpha mask.
... it applies to the <mask> element itself.
... /* keyword values */ mask-type: luminance; mask-type: alpha; /* global values */ mask-type: inherit; mask-type: initial; mask-type: unset; this property may be overridden by the mask-mode property, which has the same effect but applies to the element where the mask is used.
... formal definition initial valueluminanceapplies to<mask> elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax luminance | alpha examples setting an alpha mask html <div class="redsquare"></div> <svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="0" height="0"> <defs> <mask id="m" maskcontentunits="objectboundingbox" style="mask-type:alpha"> <rect x=".1"...
offset-distance - CSS: Cascading Style Sheets
Web › CSS › offset-distance
the offset-distance css property specifies a position along an offset-path for an element to be placed.
... syntax /* default value */ offset-distance: 0; /* the middle of the offset-path */ offset-distance: 50%; /* a fixed length positioned along the path */ offset-distance: 40px; <length-percentage> a length that specifies how far the element is along the path (defined with offset-path).
... formal definition initial value0applies totransformable elementsinheritednopercentagesrefer to the total path lengthcomputed valuefor <length> the absolute value, otherwise a percentageanimation typea length, percentage or calc(); formal syntax <length-percentage>where <length-percentage> = <length> | <percentage> examples using offset-distance in an animation the motion aspect in css motion path typically comes from animating the offset-distance property.
... if you want to animate an element along its full path, you would define its offset-path and then set up an animation that takes the offset-distance from 0% to 100%.
outline-color - CSS: Cascading Style Sheets
Web › CSS › outline-color
the outline-color css property sets the color of an element's outline.
... description an outline is a line that is drawn around an element, outside the border.
... unlike the element's border, the outline is drawn outside the element's frame, and may overlap other content.
... webaim: color contrast checker mdn understanding wcag, guideline 1.4 explanations understanding success criterion 1.4.3 | w3c understanding wcag 2.0 formal definition initial valueinvert, for browsers supporting it, currentcolor for the otherapplies toall elementsinheritednocomputed valuefor the keyword invert, the computed value is invert.
overscroll-behavior-y - CSS: Cascading Style Sheets
Web › CSS › overscroll-behavior-y
/* keyword values */ overscroll-behavior-y: auto; /* default */ overscroll-behavior-y: contain; overscroll-behavior-y: none; /* global values */ overscroll-behavior-y: inherit; overscroll-behavior-y: initial; overscroll-behavior-y: unset; initial valueautoapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete syntax the overscroll-behavior-y property is specified as a keyword chosen from the list of values below.
... contain default scroll overflow behavior is observed inside the element this value is set on (e.g.
...underlying elements will not scroll.
... formal definition initial valueautoapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax contain | none | auto examples preventing an underlying element from scrolling vertically .messages { height: 220px; overflow: auto; overscroll-behavior-y: contain; } see overscroll-behavior for a full example and explanation.
overscroll-behavior - CSS: Cascading Style Sheets
Web › CSS › overscroll-behavior
contain default scroll overflow behavior is observed inside the element this value is set on (e.g.
...underlying elements will not scroll.
... formal definition initial valueautoapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax [ contain | none | auto ]{1,2} examples preventing an underlying element from scrolling in our overscroll-behavior example (see the source code also), we present a full-page list of fake contacts, and a dialog box containing a chat window.
...this can be prevented by setting overscroll-behavior: none on the <body> element: body { margin: 0; overscroll-behavior: none; } specifications specification status comment css overscroll behavior module level 1the definition of 'overscroll-behavior' in that specification.
padding-bottom - CSS: Cascading Style Sheets
Web › CSS › padding-bottom
the padding-bottom css property sets the height of the padding area on the bottom of an element.
... an element's padding area is the space between its content and its border.
... note: the padding property can be used to set paddings on all four sides of an element with a single declaration.
... formal definition initial value0applies toall elements, except table-row-group, table-header-group, table-footer-group, table-row, table-column-group and table-column.
padding-left - CSS: Cascading Style Sheets
Web › CSS › padding-left
the padding-left css property sets the width of the padding area to the left of an element.
... an element's padding area is the space between its content and its border.
... note: the padding property can be used to set paddings on all four sides of an element with a single declaration.
... formal definition initial value0applies toall elements, except table-row-group, table-header-group, table-footer-group, table-row, table-column-group and table-column.
padding-right - CSS: Cascading Style Sheets
Web › CSS › padding-right
the padding-right css property sets the width of the padding area on the right of an element.
... an element's padding area is the space between its content and its border.
... note: the padding property can be used to set paddings on all four sides of an element with a single declaration.
... formal definition initial value0applies toall elements, except table-row-group, table-header-group, table-footer-group, table-row, table-column-group and table-column.
padding-top - CSS: Cascading Style Sheets
Web › CSS › padding-top
the padding-top css property sets the height of the padding area on the top of an element.
... an element's padding area is the space between its content and its border.
... note: the padding property can be used to set paddings on all four sides of an element with a single declaration.
... formal definition initial value0applies toall elements, except table-row-group, table-header-group, table-footer-group, table-row, table-column-group and table-column.
perspective-origin - CSS: Cascading Style Sheets
Web › CSS › perspective-origin
the perspective-origin and perspective properties are attached to the parent of a child transformed in 3-dimensional space, unlike the perspective() transform function which is placed on the element being transformed.
...it can have one of the following values: <length-percentage> indicating the position as an absolute length value or relative to the width of the element.
...it can have one of the following values: <length-percentage> indicating the position as an absolute length value or relative to the height of the element.
... formal definition initial value50% 50%applies totransformable elementsinheritednopercentagesrefer to the size of bounding boxcomputed valuefor <length> the absolute value, otherwise a percentageanimation typesimple list of length, percentage, or calc formal syntax <position>where <position> = [ [ left | center | right ] | [ top | center | bottom ] | [ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ]?
revert - CSS: Cascading Style Sheets
Web › CSS › revert
the revert css keyword reverts the cascaded value of the property from its current value to the value the property would have had if no changes had been made by the current style origin to the current element.
... revert will not affect rules applied to children of an element you reset (but will remove effects of a parent rule on a child).
... examples revert vs unset although revert and unset are similar they differ for some properties for some elements.
... h3 { font-weight: normal; color: blue; border-bottom: 1px solid grey; } <h3>this will have custom styles</h3> <p>just some text</p> <h3 style="all: revert">this should be reverted to browser/user defaults</h3> <p>just some text</p> revert on a parent reverting effectively removes the value for the element you select with some rule and only for that element.
rotate - CSS: Cascading Style Sheets
Web › CSS › rotate
syntax /* keyword values */ rotate: none; /* angle value */ rotate: 90deg; rotate: 0.25turn; rotate: 1.57rad; /* x, y, or z axis name plus angle */ rotate: x 90deg; rotate: y 0.25turn; rotate: z 1.57rad; /* vector plus angle value */ rotate: 1 1 1 90deg; values angle value an <angle> specifying the angle to rotate the affected element through, around the z axis.
... x, y, or z axis name plus angle value the name of the axis you want to rotate the affected element around ("x", "y", or "z"), plus an <angle> specifying the angle to rotate the element through.
... vector plus angle value three <number>s representing an origin-centered vector that defines a line around which you want to rotate the element, plus an <angle> specifying the angle to rotate the element through.
... formal definition initial valuenoneapplies totransformable elementsinheritednocomputed valueas specifiedanimation typea transformcreates stacking contextyes formal syntax none | <angle> | [ x | y | z | <number>{3} ] && <angle> examples rotate an element on hover html <div> <p class="rotate">rotation</p> </div> css * { box-sizing: border-box; } html { font-family: sans-serif; } div { width: 150px; margin: 0 auto; } p { padding: 10px 5px; border: 3px solid black; border-radius: 20px; width: 150px; font-size: 1.2rem; text-align: center; } .rotate { transition: rotate 1s; } div:hover .rotate { rotate: 1 -0.5 1 180deg; } result specifications ...
ruby-align - CSS: Cascading Style Sheets
Web › CSS › ruby-align
the ruby-align css property defines the distribution of the different ruby elements over the base.
... space-between is a keyword indicating that the extra space will be distributed between the elements of the ruby.
... space-around is a keyword indicating that the extra space will be distributed between the elements of the ruby, and around it.
... text html <ruby> <rb>this is a long text to check</rb> <rp>（</rp><rt>short ruby</rt><rp>）</rp> </ruby> css ruby { ruby-align: start; } result ruby aligned at the center of the base text html <ruby> <rb>this is a long text to check</rb> <rp>（</rp><rt>short ruby</rt><rp>）</rp> </ruby> css ruby { ruby-align: center; } result extra space distributed between ruby elements html <ruby> <rb>this is a long text to check</rb> <rp>（</rp><rt>short ruby</rt><rp>）</rp> </ruby> css ruby { ruby-align: space-between; } result extra space distributed between and around ruby elements html <ruby> <rb>this is a long text to check</rb> <rp>（</rp><rt>short ruby</rt><rp>）</rp> </ruby> css ruby { ruby-align: space-around; } result specifications ...
scroll-margin-inline - CSS: Cascading Style Sheets
Web › CSS › scroll-margin-inline
the scroll-margin-inline shorthand property sets the scroll margins of an element in the inline dimension.
... formal definition initial value0applies toall elementsinheritednocomputed valueas specifiedanimation typeby computed value type formal syntax <length>{1,2} examples simple demonstration this example implements something very similar to the interactive example above, except that here we'll explain to you how it's implemented.
... the child elements are styled as follows: .scroller > div { flex: 0 0 250px; width: 250px; background-color: #663399; color: #fff; font-size: 30px; display: flex; align-items: center; justify-content: center; scroll-snap-align: end; } .scroller > div:nth-child(2n) { background-color: #fff; color: #663399; } the most relevant part here is scroll-snap-align: end, which specifies that the rig...
... last of all we specify the scroll margin values, a different one for the second and third child elements: .scroller > div:nth-child(2) { scroll-margin-inline: 1rem; } .scroller > div:nth-child(3) { scroll-margin-inline: 2rem; } this means that when scrolling past the middle child elements, the scrolling will snap to 1rem outside the inline end edge of the second <div>, and 2rems outside the inline end edge of the third <div>.
scroll-margin - CSS: Cascading Style Sheets
Web › CSS › scroll-margin
the scroll-margin shorthand property sets all of the scroll margins of an element at once, assigning values much like the margin property does for margins of an element.
... formal definition initial value0applies toall elementsinheritednocomputed valueas specifiedanimation typeby computed value type formal syntax <length>{1,4} examples simple demonstration this example implements something very similar to the interactive example above, except that here we'll explain to you how it's implemented.
... the child elements are styled as follows: .scroller > div { flex: 0 0 250px; width: 250px; background-color: #663399; color: #fff; font-size: 30px; display: flex; align-items: center; justify-content: center; scroll-snap-align: start; } .scroller > div:nth-child(2n) { background-color: #fff; color: #663399; } the most relevant part here is scroll-snap-align: start, which specifies that the...
... last of all we specify the scroll margin-values, a different one for the second and third child elements: .scroller > div:nth-child(2) { scroll-margin: 1rem; } .scroller > div:nth-child(3) { scroll-margin: 2rem; } this means that when scrolling past the middle child elements, the scrolling will snap to 1rem outside the left edge of the second <div>, and 2rems outside the left edge of the third <div>.
text-align - CSS: Cascading Style Sheets
Web › CSS › text-align
the text-align css property sets the horizontal alignment of a block element or table-cell box.
...supported by the browser.applies toblock containersinheritedyescomputed valueas specified, except for the match-parent value which is calculated against its parent's direction value and results in a computed value of either left or rightanimation typediscrete formal syntax start | end | left | right | center | justify | match-parent examples left alignment html <p class="example"> integer elementum massa at nulla placerat varius.
...</p> css .example { text-align: left; border: solid; } result centered text html <p class="example"> integer elementum massa at nulla placerat varius.
...</p> css .example { text-align: center; border: solid; } result justify html <p class="example"> integer elementum massa at nulla placerat varius.
text-decoration-thickness - CSS: Cascading Style Sheets
Web › CSS › text-decoration-thickness
the text-decoration-thickness css property sets the stroke thickness of the decoration line that is used on text in an element, such as a line-through, underline, or overline.
...for a given application of this property, the thickness is constant across the whole box it is applied to, even if there are child elements with a different font size.
... formal definition initial valueautoapplies toall elements.
... it also applies to ::first-letter and ::first-line.inheritednopercentagesrefer to the font size of the element itselfcomputed valueas specifiedanimation typeby computed value type formal syntax auto | from-font | <length> | <percentage> examples varying thickness html <p class="thin">here's some text with a 1px red underline.</p> <p class="thick">this one has a 5px red underline.</p> <p class="shorthand">this uses the equivalent shorthand.</p> css .thin { text-decoration-line: underline; text-decoration-style: solid; text-decoration-color: red; text-decoration-thickness: 1px; } .thick { text-decoration-line: underline; text-decoration-style: solid; text-decoration-color: red; text-decoration-thickness: 5px; } .shorthand { text-decoration: underline solid red 5px; } r...
touch-action - CSS: Cascading Style Sheets
Web › CSS › touch-action
the touch-action css property sets how an element's region can be manipulated by a touchscreen user (for example, by zooming features built into the browser).
... when a gesture is started, the browser intersects the touch-action values of the touched element and its ancestors, up to the one that implements the gesture (in other words, the first containing scrolling element).
... this means that in practice, touch-action is typically applied only to top-level elements which have some custom behavior, without needing to specify touch-action explicitly on any of that element's descendants.
... mdn understanding wcag, guideline 1.4 explanations understanding success criterion 1.4.4 | understanding wcag 2.0 formal definition initial valueautoapplies toall elements except: non-replaced inline elements, table rows, row groups, table columns, and column groupsinheritednocomputed valueas specifiedanimation typediscrete formal syntax auto | none | [ [ pan-x | pan-left | pan-right ] | [ pan-y | pan-up | pan-down ] | pinch-zoom ] | manipulation examples disabling all gestures the most common usage is to disable all gestures on an element (and its non-scrol...
rotate() - CSS: Cascading Style Sheets
Web › CSS › transform-function › rotate
the rotate() css function defines a transformation that rotates an element around a fixed point on the 2d plane, without deforming it.
... the fixed point that the element rotates around — mentioned above — is also known as the transform origin.
... this defaults to the center of the element, but you can set your own custom transform origin using the transform-origin property.
... sin(a) -sin(a) cos(a) 0 0] examples basic example html <div>normal</div> <div class="rotated">rotated</div> css div { width: 80px; height: 80px; background-color: skyblue; } .rotated { transform: rotate(45deg); /* equal to rotatez(45deg) */ background-color: pink; } result combining rotation with another transformation if you want apply multiple transformations to an element, be careful about the order in which you specify your transformations.
scale() - CSS: Cascading Style Sheets
Web › CSS › transform-function › scale
the scale() css function defines a transformation that resizes an element on the 2d plane.
...if both coordinates are equal, the scaling is uniform (isotropic) and the aspect ratio of the element is preserved (this is a homothetic transformation).
... when a coordinate value is outside the [-1, 1] range, the element grows along that dimension; when inside, it shrinks.
...if not defined, its default value is sx, resulting in a uniform scaling that preserves the element's aspect ratio.
scaleX() - CSS: Cascading Style Sheets
Web › CSS › transform-function › scaleX
the scalex() css function defines a transformation that resizes an element along the x-axis (horizontally).
... it modifies the abscissa of each element point by a constant factor, except when the scale factor is 1, in which case the function is the identity transform.
... the scaling is not isotropic, and the angles of the element are not conserved.
... syntax scalex(s) values s is a <number> representing the scaling factor to apply on the abscissa of each point of the element.
scaleY() - CSS: Cascading Style Sheets
Web › CSS › transform-function › scaleY
the scaley() css function defines a transformation that resizes an element along the y-axis (vertically).
... it modifies the ordinate of each element point by a constant factor, except when the scale factor is 1, in which case the function is the identity transform.
... the scaling is not isotropic, and the angles of the element are not conserved.
... transform: rotatex(180deg); === transform: scaley(-1); syntax scaley(s) values s is a <number> representing the scaling factor to apply on the ordinate of each point of the element.
scaleZ() - CSS: Cascading Style Sheets
Web › CSS › transform-function › scaleZ
the scalez() css function defines a transformation that resizes an element along the z-axis.
... this scaling transformation modifies the z-coordinate of each element point by a constant factor, except when the scale factor is 1, in which case the function is the identity transform.
... the scaling is not isotropic, and the angles of the element are not conserved.
... syntax scalez(s) values s is a <number> representing the scaling factor to apply on the z-coordinate of each point of the element.
skew() - CSS: Cascading Style Sheets
Web › CSS › transform-function › skew
the skew() css function defines a transformation that skews an element on the 2d plane.
... this transformation is a shear mapping (transvection) that distorts each point within an element by a certain angle in the horizontal and vertical directions.
... skew(ax) skew(ax, ay) values ax is an <angle> representing the angle to use to distort the element along the abscissa.
... ay is an <angle> representing the angle to use to distort the element along the ordinate.
z-index - CSS: Cascading Style Sheets
Web › CSS › z-index
the z-index css property sets the z-order of a positioned element and its descendants or flex items.
... overlapping elements with a larger z-index cover those with a smaller one.
...this means that the z-indexes of descendants are not compared to the z-indexes of elements outside this element.
... formal definition initial valueautoapplies topositioned elementsinheritednocomputed valueas specifiedanimation typean integercreates stacking contextyes formal syntax auto | <integer> examples visually layering elements html <div class="dashed-box">dashed box <span class="gold-box">gold box</span> <span class="green-box">green box</span> </div> css .dashed-box { position: relative; z-index: 1; border: dashed; height: 8em; margin-bottom: 1em; margin-top: 2em; } .gold-box { position: absolute; z-index: 3; /* put .gold-box above .green-box and .dashed-box */ background: gold; width: 80%; left: 60px; top: 3em; } .green-box { position: absolute; z-index: 2; /* put .green-box above .dashed-box */ background: lightgreen; width: 20%; left: 65%; top: -2...
Media buffering, seeking, and time ranges - Developer guides
Web › Guide › Audio and video delivery › buffering seeking time ranges
this will work with <audio> or <video>; for now let's consider a simple audio example: <audio id="my-audio" controls src="music.mp3"> </audio> we can access these attributes like so: var myaudio = document.getelementbyid('my-audio'); var bufferedtimeranges = myaudio.buffered; timeranges object timeranges are a series of non-overlapping ranges of time, with start and stop times.
...eturns 15 myaudio.buffered.end(1); // returns 19 to try out and visualize buffered time ranges we can write a little bit of html: <p> <audio id="my-audio" controls> <source src="music.mp3" type="audio/mpeg"> </audio> </p> <p> <canvas id="my-canvas" width="300" height="20"> </canvas> </p> and a little bit of javascript: window.onload = function(){ var myaudio = document.getelementbyid('my-audio'); var mycanvas = document.getelementbyid('my-canvas'); var context = mycanvas.getcontext('2d'); context.fillstyle = 'lightgray'; context.fillrect(0, 0, mycanvas.width, mycanvas.height); context.fillstyle = 'red'; context.strokestyle = 'white'; var inc = mycanvas.width / myaudio.duration; // display timeranges myaudio.addeventlistener('seeked'...
...px; } #buffered-amount { display: block; height: 100%; background-color: #777; width: 0; } .progress { margin-top: -20px; height: 20px; position: relative; width: 300px; } #progress-amount { display: block; height: 100%; background-color: #595; width: 0; } and the following javascript provides our functionality: window.onload = function(){ var myaudio = document.getelementbyid('my-audio'); myaudio.addeventlistener('progress', function() { var duration = myaudio.duration; if (duration > 0) { for (var i = 0; i < myaudio.buffered.length; i++) { if (myaudio.buffered.start(myaudio.buffered.length - 1 - i) < myaudio.currenttime) { document.getelementbyid("buffered-amount").style.width = (myaudio.buffered.end(myaudio.buffered.
...length - 1 - i) / duration) * 100 + "%"; break; } } } }); myaudio.addeventlistener('timeupdate', function() { var duration = myaudio.duration; if (duration > 0) { document.getelementbyid('progress-amount').style.width = ((myaudio.currenttime / duration)*100) + "%"; } }); } the progress event is fired as data is downloaded, this is a good event to react to if we want to display download or buffering progress.
Creating and triggering events - Developer guides
Web › Guide › Events › Creating and triggering events
elem.addeventlistener('build', function (e) { // e.target matches elem }, false); // target can be any element or other eventtarget.
... elem.dispatchevent(event); event bubbling it is often desirable to trigger an event from a child element, and have an ancestor catch it; optionally, with data: <form> <textarea></textarea> </form> const form = document.queryselector('form'); const textarea = document.queryselector('textarea'); // create a new event, allow bubbling, and provide any data you want to pass to the "detail" property const eventawesome = new customevent('awesome', { bubbles: true, detail: { text: () => textarea.value } }); // the form element listens for the custom "awesome" event and then consoles the output of the passed text() method form.addeventlistener('awesome', e => console.log(e.detail.text())); // as the user types, the textarea inside the form dispatches/triggers the event to fire, and uses i...
...tself as the starting point textarea.addeventlistener('input', e => e.target.dispatchevent(eventawesome)); creating and dispatching events dynamically elements can listen for events that haven't been created yet: <form> <textarea></textarea> </form> const form = document.queryselector('form'); const textarea = document.queryselector('textarea'); form.addeventlistener('awesome', e => console.log(e.detail.text())); textarea.addeventlistener('input', function() { // create and dispatch/trigger an event on the fly // note: optionally, we've also leveraged the "function expression" (instead of the "arrow function expression") so "this" will represent the element this.dispatchevent(new customevent('awesome', { bubbles: true, detail: { text: () => textarea.value } })) }); triggering bu...
... function simulateclick() { const event = new mouseevent('click', { view: window, bubbles: true, cancelable: true }); const cb = document.getelementbyid('checkbox'); const cancelled = !cb.dispatchevent(event); if (cancelled) { // a handler called preventdefault.
Mutation events - Developer guides
Web › Guide › Events › Mutation events
domelementnamechanged and domattributenamechanged are not supported in firefox (as of version 11), and probably in other browsers as well.
... mutation events list the following is a list of all mutation events, as defined in dom level 3 events specification: domattrmodified domattributenamechanged domcharacterdatamodified domelementnamechanged domnodeinserted domnodeinsertedintodocument domnoderemoved domnoderemovedfromdocument domsubtreemodified mutation observers alternatives examples domnoderemovedfromdocument var isdescendant = function (desc, root) { return !!desc && (desc === root || isdescendant(desc.parentnode, root)); }; var onremove = function (element, callback) { var observer = new mutationobserver(function (mutations) { _.foreach(mutations, function (mutation) { _.foreach(mutation.removednodes, function (removed) { ...
... if (isdescendant(element, removed)) { callback(); // allow garbage collection observer.disconnect(); observer = undefined; } }); }); }); observer.observe(document, { childlist: true, subtree: true }); }; usage you can register a listener for mutation events using element.addeventlistener as follows: element.addeventlistener("domnodeinserted", function (event) { // ...
... }, false); the event object is passed to the listener in a mutationevent (see its definition in the specification) for most events, and mutationnameevent for domattributenamechanged and domelementnamechanged.
Using device orientation with 3D transforms - Developer guides
Web › Guide › Events › Using device orientation with 3D transforms
using orientation to rotate an element the easiest way to convert orientation data to a 3d transform is basically to use the alpha, gamma, and beta values as rotatez, rotatex and rotatey values.
... there are however two corrections that should be applied to those values: the initial alpha value is 180 (device flat on the back, top of the screen pointing 12:00), so the rotatez value should be alpha - 180 the y axis of the screen coordinate system is inverted, such that translatey(100px) moves an element 100px down, so the rotatey value should be -gamma finally, the order of the three different rotations is very important to accurately convert an orientation to a 3d rotation: rotatez, then rotatex and then rotatey.
... here's a simple code snippet to sum it up: var elem = document.getelementbyid("view3d"); window.addeventlistener("deviceorientation", function(e) { // remember to use vendor-prefixed transform property elem.style.transform = "rotatez(" + ( e.alpha - 180 ) + "deg) " + "rotatex(" + e.beta + "deg) " + "rotatey(" + ( -e.gamma ) + "deg)"; }); orientation compensation compensating the orientation of the device can be useful to create parallax effects or augmented reality.
... this is achieved by inverting the previous order of rotations and negating the alpha value: var elem = document.getelementbyid("view3d"); window.addeventlistener("deviceorientation", function(e) { // again, use vendor-prefixed transform property elem.style.transform = "rotatey(" + ( -e.gamma ) + "deg)" + "rotatex(" + e.beta + "deg) " + "rotatez(" + - ( e.alpha - 180 ) + "deg) "; }); rotate3d to orientation should you ever need to convert a rotate3d axis-angle to orientation euler angles, you can use the following algorithm: // convert a rotate3d axis-angle to deviceorientation angles function orient( aa ) { var x = aa.x, y = aa.y, z = aa.z, a = aa.a, c = math.cos( aa.a ), s = math.sin( aa.a ), t = 1 - c, // axis-angle to rotation matrix ...
Writing forward-compatible websites - Developer guides
Web › Guide › Writing forward-compatible websites
javascript prefix all global variable access in onfoo attributes with “window.” when an event handler content attribute (onclick, onmouseover, and so forth) is used on html element, all name lookup in the attribute first happens on the element itself, then on the element's form if the element is a form control, then on the document, and then on the window (where the global variables you have defined are).
... what this means is that any time you access a global variable in an event handler content attribute, including calling any function declared globally, you can end up with a name collision if a specification adds a new dom property to elements or documents which has the same name as your function or variable, and a browser implements it.
...or, conversely, that they don't have support for some other feature (e.g., don't assume that a browser that supports onload on script elements will never support onreadystatechange on them).
... a good example, for a browser vendor using the -vnd css prefix that has shipped an unprefixed implementation of the make-it-pretty property, with a behavior for the value "sometimes" that differs from the prefixed version: <style> .pretty-element { -vnd-make-it-pretty: sometimes; make-it-pretty: sometimes; } </style> the order of the declarations in the rule above is important: the unprefixed one needs to come last.
The HTML autocomplete attribute - HTML: Hypertext Markup Language
Web › HTML › Attributes › autocomplete
the html autocomplete attribute is available on <input> elements that take a text or numeric value as input, <textarea> elements, <select> elements, and <form> elements.
... if an <input>, <select> or <textarea> element has no autocomplete attribute, then browsers use the autocomplete attribute of the element's form owner, which is either the <form> element that the element is a descendant of, or the <form> whose id is specified by the form attribute of the element.
... in order to provide autocompletion, user-agents might require <input>/<select>/<textarea> elements to: have a name and/or id attribute be descendants of a <form> element the form to have a submit button values "off" the browser is not permitted to automatically enter or select a value for this field.
... note: the autocomplete attribute also controls whether firefox will — unlike other browsers — persist the dynamic disabled state and (if applicable) dynamic checkedness of an <input> element, <textarea> element, or entire <form> across page loads.
HTML attribute: min - HTML: Hypertext Markup Language
Web › HTML › Attributes › min
if the value of the element is less than this, the element fails constraint validation.
... valid for the numeric input types, including the date, month, week, time, datetime-local, number and range types, and the <meter> element, the min attribute is a number that specifies the most negative value a form control to be considered valid.
... for the <meter> element, the min attribute defines the lower numeric bound of the measured range.
... syntax for min values for other elements input type syntax example <meter> <number> <meter id="fuel" min="0" max="100" low="33" high="66" optimum="80" value="40"> at 40/100</meter> impact on step the value of min and step define what are valid values, even if the step attribute is not included, as step defaults to 0.
HTML attribute: required - HTML: Hypertext Markup Language
Web › HTML › Attributes › required
the required attribute is supported by text, search, url, tel, email, password, date, month, week, time, datetime-local, number, checkbox, radio, file, <input> types along with the <select> and <textarea> form control elements.
... if present on any of these input types and elements, the :required pseudo class will match.
... note: setting aria-required="true" tells a screen reader that an element (any element) is required, but has no bearing on the optionality of the element.
... constraint validation if the element is required and the element's value is the empty string, then the element is suffering from valuemissing and the element will match the :invalid pseudo class.
<frameset> - HTML: Hypertext Markup Language
Web › HTML › Element › frameset
the html <frameset> element is used to contain <frame> elements.
... note: because the use of frames is now discouraged in favor of using <iframe>, this element is not typically used by modern web sites.
... attributes like all other html elements, this element supports the global attributes.
... example <frameset cols="50%,50%"> <frame src="https://udn.realityripple.com/docs/web/html/element/frameset" /> <frame src="https://udn.realityripple.com/docs/web/html/element/frame" /> </frameset> ...
<legend> - HTML: Hypertext Markup Language
Web › HTML › Element › legend
the html <legend> element represents a caption for the content of its parent <fieldset>.
... permitted content phrasing content and headings (h1–h6 elements).
... permitted parents a <fieldset> whose first child is this <legend> element implicit aria role no corresponding role permitted aria roles no role permitted dom interface htmllegendelement attributes this element only includes the global attributes.
... living standard definition of the legend element html5the definition of '<legend>' in that specification.
Standard metadata names - HTML: Hypertext Markup Language
Web › HTML › Element › meta › name
the <meta> element can be used to provide document metadata in terms of name-value pairs, with the name attribute giving the metadata name, and the content attribute giving the value.
...it is different from the <title> element, which usually contain the application name, but may also contain information like the document name or a status.
... for example, to indicate that a document prefers dark mode but does render functionally in light mode as well: <meta name="color-scheme" content="dark light"> this works at the document level in the same way that the css color-scheme property lets individual elements specify their preferred and accepted color schemes.
...if there are more than one, several <meta> elements should be used.
contenteditable - HTML: Hypertext Markup Language
Web › HTML › Global attributes › contenteditable
the contenteditable global attribute is an enumerated attribute indicating if the element should be editable by the user.
... the attribute must take one of the following values: true or an empty string, which indicates that the element is editable.
... false, which indicates that the element is not editable.
... if this attribute is missing or its value is invalid, its value is inherited from its parent element: so the element is editable if its parent is editable.
draggable - HTML: Hypertext Markup Language
Web › HTML › Global attributes › draggable
the draggable global attribute is an enumerated attribute that indicates whether the element can be dragged, either with native browser behavior or the html drag and drop api.
... draggable can have the following values: true: the element can be dragged.
... false: the element cannot be dragged.
...for other elements, the event ondragstart must be set for drag and drop to work, as shown in this comprehensive example.
is - HTML: Hypertext Markup Language
Web › HTML › Global attributes › is
the is global attribute allows you to specify that a standard html element should behave like a defined custom built-in element (see using custom elements for more details).
... this attribute can only be used if the specified custom element name has been successfully defined in the current document, and extends the element type it is being applied to.
... // create a class for the element class wordcount extends htmlparagraphelement { constructor() { // always call super first in constructor super(); // constructor contents ommitted for brevity ...
... } } // define the new element customelements.define('word-count', wordcount, { extends: 'p' }); <p is="word-count"></p> specifications specification status comment html living standardthe definition of 'is' in that specification.
x-ms-acceleratorkey - HTML: Hypertext Markup Language
Web › HTML › Global attributes › x-ms-acceleratorkey
the x-ms-acceleratorkey attribute accessibly declares that an accelerator key has been assigned to an element: the element is activated via javascript when the key(s) are pressed on a keyboard.
... x-ms-acceleratorkey exposes a notification in the accessibility tree, for screen readers and other assistive technologies, that an accelerator key exists for that element.
...you must provide javascript event handlers, like onkeypress, onkeydown, or onkeyup, to listen for your declared accelerator keys and activate the element accordingly.
... to provide a keyboard shortcut for an element that does not need javascript, use the accesskey attribute.
MIME types (IANA media types) - HTTP
Web › HTTP › Basics of HTTP › MIME types
specifically if they download a text/plain file from a <link> element declaring a css file, they will not recognize it as a valid css file if presented with text/plain.
... note: use application/xml or application/xhtml+xml if you want xml’s strict parsing rules, <![cdata[…]]> sections, or elements that aren't from html/svg/mathml namespaces.
... audio and video types as is the case for images, html doesn't mandate that web browsers support any specific file and codec types for the <audio> and <video> elements, so it's important to consider your target audience and the range of browsers (and versions of those browsers) they may be using when choosing the file type and codecs to use for media.
...only resources with the correct mime type will be played in <video> or <audio> elements.
CSP: media-src - HTTP
Web › HTTP › Headers › Content-Security-Policy › media-src
the http content-security-policy (csp) media-src directive specifies valid sources for loading media using the <audio> and <video> elements.
...if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method compared to using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
... examples violation cases given this csp header: content-security-policy: media-src https://example.com/ the following <audio>, <video> and <track> elements are blocked and won't load: <audio src="https://not-example.com/audio"></audio> <video src="https://not-example.com/video"> <track kind="subtitles" src="https://not-example.com/subtitles"> </video> specifications specification status comment content security policy level 3the definition of 'media-src' in that specification.
CSP: style-src - HTTP
Web › HTTP › Headers › Content-Security-Policy › style-src
if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method than using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
...el=stylesheet inline style attributes are also blocked: <div style="display:none">foo</div> as well as styles that are applied in javascript by setting the style attribute directly, or by setting csstext: document.queryselector('div').setattribute('style', 'display:none;'); document.queryselector('div').style.csstext = 'display:none;'; however, styles properties that are set directly on the element's style property will not be blocked, allowing users to safely manipulate styles via javascript: document.queryselector('div').style.display = 'none'; these types of manipulations can be prevented by disallowing javascript via the script-src csp directive.
... content-security-policy: style-src 'unsafe-inline'; the above content security policy will allow inline styles like the <style> element, and the style attribute on any element: <style> #inline-style { background: red; } </style> <div style="display:none">foo</div> you can use a nonce-source to only allow specific inline style blocks: content-security-policy: style-src 'nonce-2726c7f26c' you will have to set the same nonce on the <style> element: <style nonce="2726c7f26c"> #inline-style { background: red; } </style> altern...
Feature-Policy: fullscreen - HTTP
Web › HTTP › Headers › Feature-Policy › fullscreen
the http feature-policy header fullscreen directive controls whether the current document is allowed to use element.requestfullscreen().
...via the allow attribute) and the allowfullscreen attribute are present on an <iframe> element, this directive takes precedence.
...it can do so by delivering the following http response header to define a feature policy: feature-policy: fullscreen 'self' https://example.com with an <iframe> element fastcorp inc.
...it can do so by delivering the following http response header to define a feature policy: feature-policy: fullscreen 'self' then include an allow attribute on the <iframe> element: <iframe src="https://other.com/videoplayer" allow="fullscreen"></iframe> iframe attributes can selectively enable features in certain frames, and not in others, even if those frames contain documents from the same origin.
Redirections in HTTP - HTTP
Web › HTTP › Redirections
there are two others: html redirections with the <meta> element javascript redirections via the dom html redirections http redirects are the best way to create redirections, but sometimes you don't have control over the server.
... in that case, try a <meta> element with its http-equiv attribute set to refresh in the <head> of the page.
... when possible, use http redirects and don't add <meta> element redirects.
...lock for the content you want to redirect: server { listen 80; server_name example.com; return 301 $scheme://www.example.com$request_uri; } to apply a redirect to a directory or only certain pages, use the rewrite directive: rewrite ^/images/(.*)$ https://images.example.com/$1 redirect; rewrite ^/images/(.*)$ https://images.example.com/$1 permanent; iis in iis, you use the <httpredirect> element to configure redirections.
CSS Houdini
Web › Houdini
houdini's css typed om is a css object model with types and methods, exposing values as javascript objects making for more intuitive css manipulation than previous string based htmlelement.style manipulations.
... every element and style sheet rule has a style map which is accessible via its stylepropertymap.
...the worklet also has access to the element's custom properties: they don't need to be passed as function arguments.
... css painting api developed to improve the extensibility of css — allows developers to write javascript functions that can draw directly into an element's background, border, or content via the paint() css function.
Array.from() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › from
mapfn optional map function to call on every element of the array.
... description array.from() lets you create arrays from: array-like objects (objects with a length property and indexed elements); or iterable objects (objects such as map and set).
... array.from() has an optional parameter mapfn, which allows you to execute a map() function on each element of the array being created.
...// [[1, 2], [2, 4], [4, 8]] const mapper = new map([['1', 'a'], ['2', 'b']]); array.from(mapper.values()); // ['a', 'b']; array.from(mapper.keys()); // ['1', '2']; array from an array-like object (arguments) function f() { return array.from(arguments); } f(1, 2, 3); // [ 1, 2, 3 ] using arrow functions and array.from() // using an arrow function as the map function to // manipulate the elements array.from([1, 2, 3], x => x + x); // [2, 4, 6] // generate a sequence of numbers // since the array is initialized with `undefined` on each position, // the value of `v` below will be `undefined` array.from({length: 5}, (v, i) => i); // [0, 1, 2, 3, 4] sequence generator (range) // sequence generator function (commonly referred to as "range", e.g.
Array.prototype.length - JavaScript
Web › JavaScript › Reference › Global Objects › Array › length
the length property of an object which is an instance of type array sets or returns the number of elements in that array.
...when you extend an array by changing its length property, the number of actual elements increases; for example, if you set length to 3 when it is currently 2, the array now contains 3 elements, which causes the third element to be a non-iterable empty slot.
...console.log(arr); // [ 1, 2, <3 empty items> ] arr.foreach(element => console.log(element)); // 1 // 2 as you can see, the length property does not necessarily indicate the number of defined values in the array.
...the value in each element is then doubled.
Array.prototype.reverse() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › reverse
the first array element becomes the last, and the last array element becomes the first.
... description the reverse method transposes the elements of the calling array object in place, mutating the array, and returning a reference to the array.
... examples reversing the elements in an array the following example creates an array a, containing three elements, then reverses the array.
... const a = [1, 2, 3]; console.log(a); // [1, 2, 3] a.reverse(); console.log(a); // [3, 2, 1] reversing the elements in an array-like object the following example creates an array-like object a, containing three elements and a length property, then reverses the array-like object.
Function.prototype.apply() - JavaScript
Web › JavaScript › Reference › Global Objects › Function › apply
examples using apply to append an array to another you can use push to append an element to an array.
... and, because push accepts a variable number of arguments, you can also push multiple elements at once.
... but, if you pass an array to push, it will actually add that array as a single element, instead of adding the elements individually.
... const array = ['a', 'b']; const elements = [0, 1, 2]; array.push.apply(array, elements); console.info(array); // ["a", "b", 0, 1, 2] using apply and built-in functions clever usage of apply allows you to use built-in functions for some tasks that would probably have otherwise been written by looping over the array values.
Map.prototype.delete() - JavaScript
Web › JavaScript › Reference › Global Objects › Map › delete
the delete() method removes the specified element from a map object by key.
... syntax mymap.delete(key); parameters key the key of the element to remove from the map object.
... return value true if an element in the map object existed and has been removed, or false if the element does not exist.
...the "bar" element is no longer present.
Map.prototype.set() - JavaScript
Web › JavaScript › Reference › Global Objects › Map › set
the set() method adds or updates an element with a specified key and a value to a map object.
... syntax mymap.set(key, value) parameters key the key of the element to add to the map object.
... value the value of the element to add to the map object.
... examples using set() let mymap = new map() // add new elements to the map mymap.set('bar', 'foo') mymap.set(1, 'foobar') // update an element in the map mymap.set('bar', 'baz') using the set() with chaining since the set() method returns back the same map object, you can chain the method call like below: // add new elements to the map with chaining.
Set.prototype.forEach() - JavaScript
Web › JavaScript › Reference › Global Objects › Set › forEach
syntax myset.foreach(callback[, thisarg]) parameters callback function to execute for each element, taking three arguments: currentvalue, currentkey the current element being processed in the set.
... callback is invoked with three arguments: the element value the element key the set object being traversed there are no keys in set objects, however, so the first two arguments are both values contained in the set.
... foreach() executes the callback function once for each element in the set object; it does not return a value.
... examples logging the contents of a set object the following code logs a line for each element in a set object: function logsetelements(value1, value2, set) { console.log('s[' + value1 + '] = ' + value2); } new set(['foo', 'bar', undefined]).foreach(logsetelements); // logs: // "s[foo] = foo" // "s[bar] = bar" // "s[undefined] = undefined" specifications specification ecmascript (ecma-262)the definition of 'set.prototype.foreach' in that specification.
SharedArrayBuffer.prototype.slice() - JavaScript
Web › JavaScript › Reference › Global Objects › SharedArrayBuffer › slice
slice(-2) extracts the last two elements in the sequence.
... for example, slice(1,4) extracts the second element through the fourth element (elements indexed 1, 2, and 3).
...slice(2,-1) extracts the third element through the second-to-last element in the sequence.
... return value a new sharedarraybuffer containing the extracted elements.
String.prototype.big() - JavaScript
Web › JavaScript › Reference › Global Objects › String › big
the big() method creates a <big> html element that causes a string to be displayed in a big font.
... usage note: the <big> element has been removed in html5 and shouldn't be used anymore.
... syntax str.big() return value a string containing a <big> html element.
... examples using big() the following example uses string methods to change the size of a string: var worldstring = 'hello, world'; console.log(worldstring.small()); // <small>hello, world</small> console.log(worldstring.big()); // <big>hello, world</big> console.log(worldstring.fontsize(7)); // <fontsize=7>hello, world</fontsize> with the element.style object you can get the element's style attribute and manipulate it more generically, for example: document.getelementbyid('yourelemid').style.fontsize = '2em'; specifications specification ecmascript (ecma-262)the definition of 'string.prototype.big' in that specification.
String.prototype.codePointAt() - JavaScript
Web › JavaScript › Reference › Global Objects › String › codePointAt
syntax str.codepointat(pos) parameters pos position of an element in str to return the code point value from.
...if there is no element at pos, returns undefined.
... description if there is no element at the specified position, undefined is returned.
...https://mths.be/codepointat v0.2.0 by @mathias */ if (!string.prototype.codepointat) { (function() { 'use strict'; // needed to support `apply`/`call` with `undefined`/`null` var defineproperty = (function() { // ie 8 only supports `object.defineproperty` on dom elements try { var object = {}; var $defineproperty = object.defineproperty; var result = $defineproperty(object, object, object) && $defineproperty; } catch(error) {} return result; }()); var codepointat = function(position) { if (this == null) { throw typeerror(); } var string = string(this); var size = string.length; ...
String.prototype.fontcolor() - JavaScript
Web › JavaScript › Reference › Global Objects › String › fontcolor
the fontcolor() method creates a <font> html element that causes a string to be displayed in the specified font color.
... usage note: the <font> element has been removed in html5 and shouldn't be used anymore.
... return value a string containing a <font> html element.
... var worldstring = 'hello, world'; console.log(worldstring.fontcolor('red') + ' is red in this line'); // '<font color="red">hello, world</font> is red in this line' console.log(worldstring.fontcolor('ff00') + ' is red in hexadecimal in this line'); // '<font color="ff00">hello, world</font> is red in hexadecimal in this line' with the element.style object you can get the element's style attribute and manipulate it more generically, for example: document.getelementbyid('yourelemid').style.color = 'red'; specifications specification ecmascript (ecma-262)the definition of 'string.prototype.fontcolor' in that specification.
String.prototype.fontsize() - JavaScript
Web › JavaScript › Reference › Global Objects › String › fontsize
the fontsize() method creates a <font> html element that causes a string to be displayed in the specified font size.
... usage note: the <font> element has been removed in html5 and shouldn't be used anymore.
... return value a string containing a <font> html element.
... examples using fontsize() the following example uses string methods to change the size of a string: var worldstring = 'hello, world'; console.log(worldstring.small()); // <small>hello, world</small> console.log(worldstring.big()); // <big>hello, world</big> console.log(worldstring.fontsize(7)); // <font size="7">hello, world</fontsize> with the element.style object you can get the element's style attribute and manipulate it more generically, for example: document.getelementbyid('yourelemid').style.fontsize = '0.7em'; specifications specification ecmascript (ecma-262)the definition of 'string.prototype.fontsize' in that specification.
String.prototype.link() - JavaScript
Web › JavaScript › Reference › Global Objects › String › link
the link() method creates a string representing the code for an <a> html element to be used as a hypertext link to another url.
... return value a string containing an <a> html element.
...the returned string can then be added to the document via document.write() or element.innerhtml.
... links created with the link() method become elements in the links array of the document object.
TypedArray.prototype.copyWithin() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › copyWithin
the copywithin() method copies the sequence of array elements within the array to the position starting at target.
... syntax typedarray.copywithin(target, start[, end = this.length]) parameters target target start index position where to copy the elements to.
... start source start index position where to start copying elements from.
...source end index position where to end copying elements from.
TypedArray.prototype.indexOf() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › indexOf
the indexof() method returns the first index at which a given element can be found in the typed array, or -1 if it is not present.
... syntax typedarray.indexof(searchelement[, fromindex = 0]) parameters searchelement element to locate in the typed array.
... return value the first index of the element in the array; -1 if not found.
... description indexof compares searchelement to elements of the typed array using strict equality (the same method used by the ===, or triple-equals, operator).
TypedArray.prototype.join() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › join
the join() method joins all elements of an array into a string.
...specifies a string to separate each element.
...if omitted, the typed array elements are separated with a comma (",").
... return value a string with all array elements joined.
TypedArray.prototype.lastIndexOf() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › lastIndexOf
the lastindexof() method returns the last index at which a given element can be found in the typed array, or -1 if it is not present.
... syntax typedarray.lastindexof(searchelement[, fromindex = typedarray.length]) parameters searchelement element to locate in the typed array.
... return value the last index of the element in the array; -1 if not found.
... description lastindexof compares searchelement to elements of the typed array using strict equality (the same method used by the ===, or triple-equals, operator).
TypedArray.prototype.reduce() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › reduce
currentvalue the current element being processed in the typed array.
... index the index of the current element being processed in the typed array.
... description the reduce method executes the callback function once for each element present in the typed array, excluding holes in the typed array, receiving four arguments: the initial value (or value from the previous callback call), the value of the current element, the current index, and the typed array over which iteration is occurring.
...if the typed array has only one element (regardless of position) and no initialvalue was provided, or if initialvalue is provided but the typed array is empty, the solo value would be returned without calling callback.
TypedArray.prototype.reduceRight() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › reduceRight
currentvalue the current element being processed in the typed array.
... index the index of the current element being processed in the typed array.
... description the reduceright method executes the callback function once for each element present in the typed array, excluding holes in the typed array, receiving four arguments: the initial value (or value from the previous callback call), the value of the current element, the current index, and the typed array over which iteration is occurring.
...if the typed array has only one element (regardless of position) and no initialvalue was provided, or if initialvalue is provided but the typed array is empty, the solo value would be returned without calling callback.
TypedArray.prototype.subarray() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › subarray
the subarray() method returns a new typedarray on the same arraybuffer store and with the same element types as for this typedarray object.
... syntax typedarray.subarray([begin [,end]]) parameters begin optional element to begin at.
... end optional element to end at.
...if not specified, all elements from the one specified by begin to the end of the array are included in the new view.
TypedArray.prototype.toLocaleString() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › toLocaleString
the tolocalestring() method returns a string representing the elements of the typed array.
... the elements are converted to strings and are separated by a locale-specific string (such as a comma “,”).
... this method has the same algorithm as array.prototype.tolocalestring() and, as the typed array elements are numbers, the same algorithm as number.prototype.tolocalestring() applies for each element.
... return value a string representing the elements of the typed array.
WeakMap.prototype.set() - JavaScript
Web › JavaScript › Reference › Global Objects › WeakMap › set
the set() method adds a new element with a specified key and value to a weakmap object.
...the key of the element to add to the weakmap object.
...the value of the element to add to the weakmap object.
... examples using the set method var wm = new weakmap(); var obj = {}; // add new elements to the weakmap wm.set(obj, 'foo').set(window, 'bar'); // chainable // update an element in the weakmap wm.set(obj, 'baz'); specifications specification ecmascript (ecma-262)the definition of 'weakmap.prototype.set' in that specification.
<mfenced> - MathML
Web › MathML › Element › mfenced
the deprecated mathml <mfenced> element used to provide the possibility to add custom opening and closing parentheses (such as brackets) and separators (such as commas or semicolons) to an expression.
...use the <mrow> and <mo> elements instead.
...close="}" separators=";;,"> <mi>a</mi> <mi>b</mi> <mi>c</mi> <mi>d</mi> <mi>e</mi> </mfenced> </math> all excess is ignored (,) sample rendering: rendering in your browser: a b c d e <math> <mfenced open="[" close="]" separators="||||,"> <mi>a</mi> <mi>b</mi> <mi>c</mi> <mi>d</mi> <mi>e</mi> </mfenced> </math> specifications the <mfenced> element is no longer part of the latest mathml standard.
... use the <mrow> and <mo> elements instead, or, for backwards compatibility, see mathml-polyfills/mfenced.
Web audio codec guide - Web media technologies
Web › Media › Formats › Audio codecs
latency 5 ms to 66.5 ms browser compatibility feature chrome edge firefox internet explorer opera safari opus support 33 14 15 no 20 11[2] this information refers to support for opus in html <audio> and <video> elements, and not to webrtc.
... [2] safari supports opus in the <audio> element only when packaged in a caf file, and only on macos high sierra (10.13) or ios 11.
...dth latency at least 100 ms browser compatibility feature chrome edge firefox internet explorer opera safari vorbis support 4 17 3.5 no 11.5 no this information refers to support for vorbis in html <audio> and <video> elements, and not to webrtc.
...of course, if you can provide multiple formats (for example, by using the <source> element within your <audio> and <video> elements), you can avoid many or all of those exceptions.
Media container formats (file types) - Web media technologies
Web › Media › Formats › Containers
maximizing compatibility with multiple containers to optimize compatibility, it's worth considering providing more than one version of media files, using the <source> element to specify each source within the <audio> or <video> element.
... to do this, you create a <video> (or <audio>) element with no src attribute.
... then add child <source> elements within the <video> element, one for each version of the video you offer.
...if neither of those can be played, the text "this browser does not support the html5 video element." is presented.
OpenSearch description format
Web › OpenSearch
(see reference material for links to other browsers' documentation.) firefox also supports additional features not in the opensearch standard, such as search suggestions and the <searchform> element.
... note: since this element is firefox-specific, and not part of the opensearch specification, we use the moz: xml namespace prefix in the example above to ensure that other user agents that don't support this element can safely ignore it.
... to support autodiscovery, add a <link> element for each plugin to the <head> of your web page: <link rel="search" type="application/opensearchdescription+xml" title="searchtitle" href="pluginurl"> replace the bolded items as explained below: searchtitle the name of the search to perform, such as "search mdc" or "yahoo!
...to support this, include an extra url element with type="application/opensearchdescription+xml" and rel="self".
Lazy loading - Web Performance
Web › Performance › Lazy loading
see also: element link images and iframes very often, webpages contain many images that contribute to data-usage and how fast a page can load.
... loading attribute the loading attribute on an <img> element (or the loading attribute on an <iframe>) can be used to instruct the browser to defer loading of images/iframes that are off-screen until the user scrolls near them.
... polyfill include this polyfill to provide support for older and currently incompatible browsers: loading-attribute-polyfill intersection observer api intersection observers allow the user to know when an observed element enters or exits the browser’s viewport.
... event handlers when browser compatibility is crucial, there are a few options: polyfill intersection observer fallback to scroll, resize or orientation change event handlers to determine if a specific element is in viewport specifications specification status comment html living standard living standard ...
Mobile first - Progressive web apps (PWAs)
Web › Progressive web apps › Responsive › Mobile first
display: table-caption makes the <nav> element think it's the caption of the table, and caption-side: bottom makes it jump down to the bottom of the table.
... one word of warning about this technique though - positioning doesn't work as expected on elements with display: table set on them.
...ure both of these were not direct children of the <article>, otherwise the following would not work: #bottom, #top { font-size: 0.8em; position:absolute; right: 1em; text-decoration: none; } #top { color: white; top: 0.5em; } #bottom { bottom: 0.5em; } i also set their parents to be positioned relatively, so they would become the positioning contexts of the absolutely positioned elements (you don't want them to be positioned relative to the <body> element.) adding a mobile first layout the above layout is fine for narrower layouts, but it doesn't work very well when you get wider than about 480px.
...modernizr stores the results of all its feature tests as classes on the html element.
SVG Event Attributes - SVG: Scalable Vector Graphics
Web › SVG › Attribute › Events
they specifies some script to run when the event of the given type is dispatched to the element on which the attributes are specified.
... the global event attributes are available on all svg elements.
... other event attributes are available on a case by case basis for each elements.
... attributes animation event attributes onbegin, onend, onrepeat document event attributes onabort, onerror, onresize, onscroll, onunload document element event attributes oncopy, oncut, onpaste global event attributes oncancel, oncanplay, oncanplaythrough, onchange, onclick, onclose, oncuechange, ondblclick, ondrag, ondragend, ondragenter, ondragexit, ondragleave, ondragover, ondragstart, ondrop, ondurationchange, onemptied, onended, onerror, onfocus, oninput, oninvalid, onkeydown, onkeypress, onkeyup, onload, onloadeddata, onloadedmetadata, onloadstart, onmousedown, onmouseenter, onmouseleave, onmousemove, onmouseout, onmouseover, onmouseup, onmousewheel, onpause, onplay, onplaying, onprogress, onratechange, onreset, onresize, onscroll, onseeked,...
attributeType - SVG: Scalable Vector Graphics
Web › SVG › Attribute › attributeType
four elements are using this attribute: <animate>, <animatecolor>, <animatetransform>, and <set> html, body, svg { height: 100%; } <svg viewbox="0 0 250 250" xmlns="http://www.w3.org/2000/svg"> <rect x="50" y="50" width="100" height="100"> <animate attributetype="xml" attributename="y" from="0" to="50" dur="5s" repeatcount="indefinite"/> </rect> </svg> usage notes value css | xml | auto default value auto animatable no css this value specifies that the value of attributename is the name of a css property defined as animatable.
... xml this value specifies that the value of attributename is the name of an xml attribute defined as animatable in the default xml namespace for the target element.
... auto this value specifies that the implementation should match the attributename to an attribute for the target element.
... user agents first search through the list of css properties for a matching property name, and if none is found, search the default xml namespace for the element.
baseline-shift - SVG: Scalable Vector Graphics
Web › SVG › Attribute › baseline-shift
the baseline-shift attribute allows repositioning of the dominant-baseline relative to the dominant-baseline of the parent text content element.
... as a presentation attribute, it can be applied to any element but it has effect only on the following four elements: <altglyph>, <textpath>, <tref>, and <tspan> usage notes value <length-percentage> | sub | super default value 0 animatable yes sub the dominant-baseline is shifted to the default position for subscripts.
... <length-percentage> a length value raises (positive value) or lowers (negative value) the dominant-baseline of the parent text content element by the specified length.
... a percentage value raises (positive value) or lowers (negative value) the dominant-baseline of the parent text content element by the specified percentage of the line-height.
class - SVG: Scalable Vector Graphics
Web › SVG › Attribute › class
« svg attribute reference home assigns a class name or set of class names to an element.
... you may assign the same class name or names to any number of elements, however, multiple class names must be separated by whitespace characters.
... an element's class name serves two key roles: as a style sheet selector, for when an author assigns style information to a set of elements.
... #00cc00; } circle.circleclass { stroke: #006600; fill: #cc0000; } ]]> </style> <rect class="rectclass" x="10" y="10" width="100" height="100"/> <circle class="circleclass" cx="40" cy="50" r="26"/> </svg> </body> </html> elements the following elements can use the class attribute: <a> <altglyph> <circle> <clippath> <defs> <desc> <ellipse> <feblend> <fecolormatrix> <fecomponenttransfer> <fecomposite> <feconvolvematrix> <fediffuselighting> <fedisplacementmap> <feflood> <fegaussianblur> <feimage> <femerge> <femorphology> <feoffset> <fespecularlighting> <fetile> <feturbulence> <filter> <font> <f...
color-interpolation - SVG: Scalable Vector Graphics
Web › SVG › Attribute › color-interpolation
when a child element is blended into a background, the value of the color-interpolation property on the child determines the type of blending, not the value of the color-interpolation on the parent.
... for gradients which make use of the href or the deprecated xlink:href attribute to reference another gradient, the gradient uses the propertyʼs value from the gradient element which is directly referenced by the fill or stroke property.
... when animating colors, color interpolation is performed according to the value of the color-interpolation property on the element being animated.
... as a presentation attribute, it can be applied to any element but it only has an effect on the following 29 elements: <a>, <animate>, <animatecolor>, <circle>, <clippath>, <defs>, <ellipse>, <foreignobject>, <g>, <glyph>, <image>, <line>, <lineargradient>, <marker>, <mask>, <missing-glyph>, <path>, <pattern>, <polygon>, <polyline>, <radialgradient>, <rect>, <svg>, <switch>, <symbol>, <text>, <textpath>, <tspan>, and <use> usage notes value auto | srgb | linearrgb default value srgb animatable yes auto indicates that the user agent can choose either the srgb or linearrgb spaces for color interpolation.
dur - SVG: Scalable Vector Graphics
Web › SVG › Attribute › dur
five elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, <animatetransform>, and <set> html, body, svg { height: 100%; } <svg viewbox="0 0 220 150" xmlns="http://www.w3.org/2000/svg"> <rect x="0" y="0" width="100" height="100"> <animate attributetype="xml" attributename="y" from="0" to="50" dur="1s" repeatcount="indefinite"/> </rect> <rect x="120" y="0" width="100" height="100"> <animate attributetype="xml" attributename="y" from="0" to="50" dur="3s" repeatcount="indefinite"/> </rect> </svg> usage notes value <clock-value> | media | indefinite default value indefinite animatable no <clock-value> this value specifies...
...this is only valid for elements that define media.
... (for animation elements the attribute will be ignored if media is specified.) indefinite this value specifies the simple duration as indefinite.
... note: the interpolation will not work if the simple duration is indefinite (although this may still be useful for <set> elements).
dx - SVG: Scalable Vector Graphics
Web › SVG › Attribute › dx
the dx attribute indicates a shift along the x-axis on the position of an element or its content.
... seven elements are using this attribute: <altglyph>, <fedropshadow>, <feoffset>, <glyphref>, <text>, <tref>, and <tspan> html,body,svg { height:100% } <svg viewbox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"> <!-- lines materialized the position of the glyphs --> <line x1="0" x2="100%" y1="50%" y2="50%" /> <line x1="10%" x2="10%" y1="0" y2="100%" /> <line x1="60%" x2="60%" y1="0" y2="100%" /> <!-- some reference text --> <text x="10%" y="50%" fill="grey">svg</text> <!-- the same text with a shift along the x-axis --> <text dx="50%" x="10%" y="50%">svg</text> </svg> line { stroke: red; stroke-width: .5px; stroke-dasharray: 3px; } altglyph warning: as of svg2 <altglyph> is deprecated and shouldn't be used.
...the unit used to resolve the value of the attribute is set by the primitiveunits attribute of the <filter> element.
...the unit used to resolve the value of the attribute is set by the primitiveunits attribute of the <filter> element.
dy - SVG: Scalable Vector Graphics
Web › SVG › Attribute › dy
the dy attribute indicates a shift along the y-axis on the position of an element or its content.
... seven elements utilize this attribute: <altglyph>, <fedropshadow>, <feoffset>, <glyphref>, <text>, <tref>, and <tspan> html,body,svg { height:100% } <svg viewbox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"> <!-- lines materialized the position of the glyphs --> <line x1="10%" x2="10%" y1="0" y2="100%" /> <line x1="0" x2="100%" y1="30%" y2="30%" /> <line x1="0" x2="100%" y1="80%" y2="80%" /> <!-- some reference text --> <text x="10%" y="30%" fill="grey">svg</text> <!-- the same text with a shift along the y-axis --> <text dy="50%" x="10%" y="30%">svg</text> </svg> line { stroke: red; stroke-width: .5px; stroke-dasharray: 3px; } altglyph warning: as of svg2 <altglyph> is deprecated and shouldn't be used.
...the unit used to resolve the value of the attribute is set by the primitiveunits attribute of the <filter> element.
...the unit used to resolve the value of the attribute is set by the primitiveunits attribute of the <filter> element.
marker-end - SVG: Scalable Vector Graphics
Web › SVG › Attribute › marker-end
for all shape elements, except <polyline> and <path>, the last vertex is the same as the first vertex.
...for <path> elements, for each closed subpath, the last vertex is the same as the first vertex.
... as a presentation attribute, it can be applied to any element but it has effect only on the following seven elements: <circle>, <ellipse>, <line>, <path>, <polygon>, <polyline>, and <rect> html, body, svg { height: 100%; } <svg viewbox="0 0 120 120" xmlns="http://www.w3.org/2000/svg"> <defs> <marker id="triangle" viewbox="0 0 10 10" refx="1" refy="5" markerunits="strokewidth" markerwidth="10" markerheight="10" orient="auto"> <path d="m 0 0 l 10 5 l 0 10 z" fill="#f00"/> </marker> </defs> <polyline fill="none" stroke="black" points="20,100 40,60 70,80 100,20" marker-end="url(#trian...
... <marker-ref> this value is a reference to a <marker> element, which will be drawn at the final vertex.
marker-start - SVG: Scalable Vector Graphics
Web › SVG › Attribute › marker-start
for all shape elements, except <polyline> and <path>, the last vertex is the same as the first vertex.
...for <path> elements, for each closed subpath, the last vertex is the same as the first vertex.
... as a presentation attribute, it can be applied to any element but it has effect only on the following seven elements: <circle>, <ellipse>, <line>, <path>, <polygon>, <polyline>, and <rect> html, body, svg { height: 100%; } <svg viewbox="0 0 120 120" xmlns="http://www.w3.org/2000/svg"> <defs> <marker id="triangle" viewbox="0 0 10 10" refx="1" refy="5" markerunits="strokewidth" markerwidth="10" markerheight="10" orient="auto"> <path d="m 0 0 l 10 5 l 0 10 z" fill="#f00"/> </marker> </defs> <polyline fill="none" stroke="black" points="20,100 40,60 70,80 100,20" marker-start="url(...
... <marker-ref> this value is a reference to a <marker> element, which will be drawn at the first vertex.
maskUnits - SVG: Scalable Vector Graphics
Web › SVG › Attribute › maskUnits
the maskunits attribute indicates which coordinate system to use for the geometry properties of the <mask> element.
... only one element is using this attribute: <mask> html,body,svg { height:100% } <svg viewbox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"> <mask id="mymask1" maskunits="userspaceonuse" x="20%" y="20%" width="60%" height="60%"> <rect fill="black" x="0" y="0" width="100%" height="100%" /> <circle fill="white" cx="50" cy="50" r="35" /> </mask> <mask id="mymask2" maskunits="objectboundingbox" x="20%" y="20%" width="60%" height="60%"> <rect fill="black" x="0" y="0" width="100%" height="100%" /> <circle fill="white" cx="50" cy="50" r="35" /> </mask> <!-- some reference rect to materialized the mask --> <rect id="r1" x="0" y="0" width="45" height="45" /> <rect id="r2" x="0" y="55" width="45" height="45" /> <rect id="r3" x="55" y="55" wi...
...f="#r1" fill="red" /> <use mask="url(#mymask1)" xlink:href="#r2" fill="red" /> <use mask="url(#mymask1)" xlink:href="#r3" fill="red" /> <!-- the last rect is masked with objectboundingbox units --> <use mask="url(#mymask2)" xlink:href="#r4" fill="red" /> </svg> mask for <mask>, maskunits defines the coordinate system in use for the geometry attributes (x, y, width and height) of the element.
... objectboundingbox this value indicates that all coordinates for the geometry attributes represent fractions or percentages of the bounding box of the element to which the mask is applied.
patternUnits - SVG: Scalable Vector Graphics
Web › SVG › Attribute › patternUnits
the patternunits attribute indicates which coordinate system to use for the geometry properties of the <pattern> element.
... only one element is using this attribute: <pattern> html,body,svg { height:100% } <svg viewbox="0 0 200 100" xmlns="http://www.w3.org/2000/svg"> <!-- all geometry properties are relative to the current user space --> <pattern id="p1" x="12.5" y="12.5" width="25" height="25" patternunits="userspaceonuse"> <circle cx="10" cy="10" r="10" /> </pattern> <!-- all geometry properties are relative to the target bounding box --> <pattern id="p2" x=".125" y=".125" width=".25" height=".25" patternunits="objectboundingbox"> <circle cx="10" cy="10" r="10" /> </pattern> <!-- left square with user space tiles --> <rect x="10" y="10" width="80" height="80" fill="url(#p1)" /> <!-- right square with bounding box tiles --> <rect x="110" y="10" ...
...width="80" height="80" fill="url(#p2)" /> </svg> pattern for <pattern>, patternunits defines the coordinate system in use for the geometry properties (x, y, width and height) of the element.
... objectboundingbox this value indicates that all coordinates for the geometry properties represent fractions or percentages of the bounding box of the element to which the mask is applied.
refX - SVG: Scalable Vector Graphics
Web › SVG › Attribute › refX
the refx attribute defines the x coordinate of an element’s reference point.
... two elements are using this attribute: <marker> and <symbol> marker for <marker>, refx defines the x coordinate of the marker’s reference point, which is to be placed exactly at the marker’s position on the shape.
... symbol for <symbol>, refx defines the x coordinate of the symbol, which is defined by the cumulative effect of the x attribute and any transformations on the <symbol> and its host <use> element.
... for backwards compatibility, the behavior when refx is not specified on a <symbol> element is different from when it is specified with a value of 0, and therefore different from the behavior when an equivalent attribute is not specified on a <marker> element.
refY - SVG: Scalable Vector Graphics
Web › SVG › Attribute › refY
the refy attribute defines the y coordinate of an element’s reference point.
... two elements are using this attribute: <marker> and <symbol> marker for <marker>, refy defines the y coordinate of the marker’s reference point, which is to be placed exactly at the marker’s position on the shape.
... symbol for <symbol>, refy defines the y coordinate of the symbol, which is defined by the cumulative effect of the y attribute and any transformations on the <symbol> and its host <use> element.
... for backwards compatibility, the behavior when refy is not specified on a <symbol> element is different from when it is specified with a value of 0, and therefore different from the behavior when an equivalent attribute is not specified on a <marker> element.
result - SVG: Scalable Vector Graphics
Web › SVG › Attribute › result
if supplied, then graphics that result from processing this filter primitive can be referenced by an in attribute on a subsequent filter primitive within the same <filter> element.
... seventeen elements are using this attribute: <feblend>, <fecolormatrix>, <fecomponenttransfer>, <fecomposite>, <feconvolvematrix>, <fediffuselighting>, <fedisplacementmap>, <fedropshadow>, <feflood>, <fegaussianblur>, <feimage>, <femerge>, <femorphology>, <feoffset>, <fespecularlighting>, <fetile>, and <feturbulence> html, body, svg { height: 100%; } <svg viewbox="0 0 220 220" xmlns="http://www.w3.org/2000/svg"> <filter id="displacementfilter"> <feturbulence type="turbulence" basefrequency="0.05" numoctaves="2" result="turbulence"/> <fedisplacementmap in2="turbulence" in="sourcegraphic...
...it is only meaningful within a given <filter> element and thus has only local scope.
... it is legal for the same <filter-primitive-reference> to appear multiple times within the same <filter> element.
rotate - SVG: Scalable Vector Graphics
Web › SVG › Attribute › rotate
the rotate attribute specifies how the animated element rotates as it travels along a path specified in an <animatemotion> element.
... usage notes value auto | auto-reverse | <number> default value 0 animatable no the auto and auto-reverse values allow the animated element's rotation to change dynamically as it travels along the path.
... if the value of rotate is auto, the element turns to align its right-hand side in the current direction of motion.
...the default value of 0 keeps the animated element in its original orientation.
startOffset - SVG: Scalable Vector Graphics
Web › SVG › Attribute › startOffset
the startoffset attribute defines an offset from the start of the path for the initial current text position along the path after converting the path to the <textpath> element's coordinate system.
... only one element is using this attribute: <textpath> html,body,svg { height:100% } <svg viewbox="0 0 220 100" xmlns="http://www.w3.org/2000/svg"> <path id="path1" fill="none" stroke="red" d="m10,90 q90,90 90,45 q90,10 50,10 q10,10 10,40 q10,70 45,70 q70,70 75,50" /> <path id="path2" fill="none" stroke="red" d="m130,90 q210,90 210,45 q210,10 170,10 q130,10 130,40 q130,70 165,70 q190,70 195,50" /> <text> <textpath href="#path1" startoffset="0"> quick brown fox jumps over the lazy dog.
... </textpath> </text> </svg> usage notes value <length-percentage> | <number> default value 0 animatable yes <length-percentage> a length represents a distance along the path measured in the current user coordinate system for the <textpath> element.
... <number> this value indicates a distance along the path measured in the current user coordinate system for the <textpath> element.
writing-mode - SVG: Scalable Vector Graphics
Web › SVG › Attribute › writing-mode
the writing-mode attribute specifies whether the initial inline-progression-direction for a <text> element shall be left-to-right, right-to-left, or top-to-bottom.
... the writing-mode attribute applies only to <text> elements; the attribute is ignored for <tspan>, <tref>, <altglyph> and <textpath> sub-elements.
... (note that the inline-progression-direction can change within a <text> element due to the unicode bidirectional algorithm and properties direction and unicode-bidi.) note: as a presentation attribute, writing-mode can be used as a css property.
... as a presentation attribute, it can be applied to any element but it has effect only on the following five elements: <altglyph>, <text>, <textpath>, <tref>, and <tspan> usage notes default value horizontal-tb value horizontal-tb | vertical-rl | vertical-lr animatable yes horizontal-tb this value defines a top-to-bottom block flow direction.
xlink:show - SVG: Scalable Vector Graphics
Web › SVG › Attribute › xlink:show
only one element is using this attribute: <a> usage notes value new | replace | embed | other | none default value replace animatable no new this value specifies that the referenced resource is opened in a new window or tab.
... this is similar to the effect achieved by an html <a> element with target set to _blank.
...this is similar to the effect achieved by an html <a> element with target set to _self.
...this is similar to the effect achieved by an html <img> element.
z - SVG: Scalable Vector Graphics
Web › SVG › Attribute › z
the z attribute defines the location along the z-axis for a light source in the coordinate system established by the primitiveunits attribute on the <filter> element, assuming that, in the initial coordinate system, the positive z-axis comes out towards the person viewing the content and assuming that one unit along the z-axis equals one unit in x and y.
... two elements are using this attribute: <fepointlight> and <fespotlight> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="diffuselighting1" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic"> <fepointlight x="60" y="60" z="10" /> </fediffuselighting> </filter> <filter id="diffuselighting2" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic"> <fepointlight x="60" y="60" z="50" /> </fediffuselighting> </filter> <rect x="0" y="0" width="200" height="200" style="filter: url(#diffuselighting1);" /> <rect x="0" y="0" width="200" height="200" style="filter: url(#diffuselighting2); transform: translatex(220px);" /> </svg> fepointlight for <...
...fepointlight>, z defines the location along the z-axis for the light source in the coordinate system established by the primitiveunits attribute on the <filter> element.
... value <number> default value 1 animatable yes fespotlight for <fespotlight>, z defines the location along the z-axis for the light source in the coordinate system established by the primitiveunits attribute on the <filter> element.
<animateMotion> - SVG: Scalable Vector Graphics
Web › SVG › Element › animateMotion
the svg <animatemotion> element let define how an element moves along a motion path.
... note: to reuse an existing path, it will be necessary to use an <mpath> element inside the <animatemotion> element instead of the path attribute.
...: 0; display:block; } <svg viewbox="0 0 200 100" xmlns="http://www.w3.org/2000/svg"> <path fill="none" stroke="lightgrey" d="m20,50 c20,-50 180,150 180,50 c180-50 20,150 20,50 z" /> <circle r="5" fill="red"> <animatemotion dur="10s" repeatcount="indefinite" path="m20,50 c20,-50 180,150 180,50 c180-50 20,150 20,50 z" /> </circle> </svg> usage context categoriesanimation elementpermitted contentany number of the following elements, in any order:descriptive elements<mpath> attributes keypoints this attribute indicate, in the range [0,1], how far is the object along the path for each keytimes associated values.
...peatcount, repeatdur, fill animation value attributes calcmode, values, keytimes, keysplines, from, to, by other animation attributes most notably: attributename, additive, accumulate animation event attributes most notably: onbegin, onend, onrepeat global attributes core attributes most notably: id styling attributes class, style event attributes global event attributes, document element event attributes usage notes this element implements the svganimatemotionelement interface.
<cursor> - SVG: Scalable Vector Graphics
Web › SVG › Element › cursor
note: the css cursor property should be used instead of this element.
... the <cursor> svg element can be used to define a platform-independent custom cursor.
... a recommended approach for defining a platform-independent custom cursor is to create a png image and define a cursor element that references the png image and identifies the exact position within the image which is the pointer position (i.e., the hot spot).
... usage context categoriesnonepermitted contentany number of the following elements, in any order:descriptive elements attributes global attributes conditional processing attributes core attributes xlink attributes externalresourcesrequired specific attributes x y xlink:href dom interface this element implements the svgcursorelement interface.
<foreignObject> - SVG: Scalable Vector Graphics
Web › SVG › Element › foreignObject
the <foreignobject> svg element includes elements from a different xml namespace.
... value type: <length>|<percentage> ; default value: 0; animatable: yes note: starting with svg2, x, y, width, and height are geometry properties, meaning those attributes can also be used as css properties for that element.
... global attributes core attributes most notably: id, tabindex styling attributes class, style conditional processing attributes most notably: requiredextensions, systemlanguage event attributes global event attributes, graphical event attributes, document event attributes, document element event attributes presentation attributes most notably: clip-path, clip-rule, color, color-interpolation, color-rendering, cursor, display, fill, fill-opacity, fill-rule, filter, mask, opacity, pointer-events, shape-rendering, stroke, stroke-dasharray, stroke-dashoffset, stroke-linecap, stroke-linejoin, stroke-miterlimit, stroke-opacity, stroke-width, transform, vector-effect, visibility aria attributes aria-activedescendant, aria-atomic, aria-autocomplete, aria-busy, aria-checked, aria-colcount,...
...-live, aria-modal, aria-multiline, aria-multiselectable, aria-orientation, aria-owns, aria-placeholder, aria-posinset, aria-pressed, aria-readonly, aria-relevant, aria-required, aria-roledescription, aria-rowcount, aria-rowindex, aria-rowspan, aria-selected, aria-setsize, aria-sort, aria-valuemax, aria-valuemin, aria-valuenow, aria-valuetext, role usage notes categoriesnonepermitted contentany elements or character data specifications specification status comment scalable vector graphics (svg) 2the definition of '<foreignobject>' in that specification.
<hatch> - SVG: Scalable Vector Graphics
Web › SVG › Element › hatch
the <hatch> svg element is used to fill or stroke an object using one or more pre-defined paths that are repeated at fixed intervals in a specified direction to cover the areas to be painted.
... hatches defined by the <hatch> element can then referenced by the fill and stroke css properties on a given graphics element to indicate that the given element shall be filled or stroked with the hatch.
... paths are defined by <hatchpath> elements.
... usage context categoriesnever-rendered element, paint server elementpermitted contentany number of the following elements, in any order:animation elementsdescriptive elements<hatchpath>, <script>, <style> attributes global attributes core attributes global event attributes presentation attributes style attributes specific attributes x y pitch rotate hatchunits hatchcontentunits transform href dom interface this element implements the svghatchelement interface.
<metadata> - SVG: Scalable Vector Graphics
Web › SVG › Element › metadata
the <metadata> svg element adds metadata to svg content.
...the contents of <metadata> should be elements from other xml namespaces such as rdf, foaf, etc.
... usage context categoriesdescriptive elementpermitted contentany elements or character data attributes global attributes core attributes global event attributes specific attributes none dom interface this element implements the svgmetadataelement interface.
... candidate recommendation allowed global event attributes on the element.
<pattern> - SVG: Scalable Vector Graphics
Web › SVG › Element › pattern
the <pattern> element defines a graphics object which can be redrawn at repeated x- and y-coordinate intervals ("tiled") to cover an area.
... the <pattern> is referenced by the fill and/or stroke attributes on other graphics elements to fill or stroke those elements with the referenced pattern.
... value type: userspaceonuse|objectboundingbox; default value: userspaceonuse; animatable: yes note: this attribute has no effect if a viewbox attribute is specified on the <pattern> element.
...-rule, color, color-interpolation, color-rendering, cursor, display, fill, fill-opacity, fill-rule, filter, mask, opacity, pointer-events, shape-rendering, stroke, stroke-dasharray, stroke-dashoffset, stroke-linecap, stroke-linejoin, stroke-miterlimit, stroke-opacity, stroke-width, transform, vector-effect, visibility xlink attributes most notably: xlink:title usage notes categoriescontainer elementpermitted contentany number of the following elements, in any order:animation elementsdescriptive elementsshape elementsstructural elementsgradient elements<a>, <altglyphdef>, <clippath>, <color-profile>, <cursor>, <filter>, <font>, <font-face>, <foreignobject>, <image>, <marker>, <mask>, <pattern>, <script>, <style>, <switch>, <text>, <view> specifications specification status co...
<script> - SVG: Scalable Vector Graphics
Web › SVG › Element › script
the svg script element allows to add scripts to an svg document.
... while svg's script element is equivalent to the html <script> element, it has some discrepancies, like it uses the href attribute instead of src and it doesn't support ecmascript modules so far (see browser compatibility below for details) html,body,svg { height:100% } <svg viewbox="0 0 10 10" xmlns="http://www.w3.org/2000/svg"> <script> // <![cdata[ window.addeventlistener('domcontentloaded', () => { function getcolor () { const r = math.round(math.random() * 255).tostring(16).padstart(2,'0') const g = math.round(math.random() * 255).tostring(16).padstart(2,'0') const b = math.round(math.random() * 255).tostring(16).padstart(2,'0') return `#${r}${g}${b}` } document.queryselector('circle').addeventlistener('click', (e) => { e.target.style.fi...
...ll = getcolor() }) }) // ]]> </script> <circle cx="5" cy="5" r="4" /> </svg> attributes crossorigin this attribute defines cors settings as define for the html <script> element.
... value type: <url> ; default value: none; animatable: no global attributes core attributes most notably: id styling attributes class, style event attributes global event attributes, document element event attributes usage notes categoriesnonepermitted contentany elements or character data specifications specification status comment scalable vector graphics (svg) 2the definition of '<script>' in that specification.
<tspan> - SVG: Scalable Vector Graphics
Web › SVG › Element › tspan
the svg <tspan> element defines a subtext within a <text> element or another <tspan> element.
... value type: <length>|<percentage> ; default value: none; animatable: yes dx shifts the text position horizontally from a previous text element.
... value type: <length>|<percentage> ; default value: none; animatable: yes dy shifts the text position vertically from a previous text element.
...-level, aria-live, aria-modal, aria-multiline, aria-multiselectable, aria-orientation, aria-owns, aria-placeholder, aria-posinset, aria-pressed, aria-readonly, aria-relevant, aria-required, aria-roledescription, aria-rowcount, aria-rowindex, aria-rowspan, aria-selected, aria-setsize, aria-sort, aria-valuemax, aria-valuemin, aria-valuenow, aria-valuetext, role usage notes categoriestext content element, text content child elementpermitted contentcharacter data and any number of the following elements, in any order:descriptive elements<a>, <altglyph>, <animate>, <animatecolor>, <set>, <tref>, <tspan> specifications specification status comment scalable vector graphics (svg) 2the definition of '<tspan>' in that specification.
Linking - SVG: Scalable Vector Graphics
Web › SVG › Linking
the target attribute on the svg <a> element doesn't work in mozilla firefox 1.5.
...ocuments are embedded within a parent html document using the tag: page1.html: <html> <body> <p>this is a svg button:</p> <object width="100" height="50" type="image/svg+xml" data="button.svg"/> </body> </html> button.svg: <?xml version="1.1" encoding="utf-8"?> <svg xmlns="http://www.w3.org/2000/svg"> <a xlink:href="page2.html" target="_top"> <g> <!-- button graphical elements here --> </g> </a> </svg> the specification says that the browser should navigate to the html document page2.html when the button graphics are clicked.
... however, target does not work with mozilla's implementation of the svg <a> element in firefox 1.5.
... to get around this, requires a little ugly javascript hacking: button.svg: <?xml version="1.1" encoding="utf-8"?> <svg xmlns="http://www.w3.org/2000/svg"> <g onclick="top.document.href='page2.html'" cursor="pointer"> <!-- button graphical elements here --> </g> </svg> example for an example of this solution at work see www.codedread.com.
SVG as an Image - SVG: Scalable Vector Graphics
Web › SVG › SVG as an Image
many browsers support svg images in: html <img> or <svg> elements css background-image gecko-specific contexts additionally, gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) introduced support for using svg in these contexts: css list-style-image css content svg <image> element svg <feimage> element canvas drawimage function restrictions for security purposes, gecko places some restrictions on svg content when it's being used as an image: javascript is disabled.
... note that the above restrictions are specific to image contexts; they don't apply when svg content is viewed directly, or when it's embedded as a document via the <iframe>, <object>, or <embed> elements.
... specifications specification status comment html5the definition of 'svg within <img> element' in that specification.
... recommendation defines the usage of svg within <img> elements.
<xsl:preserve-space> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › preserve-space
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:preserve-space> element defines the elements in the source document for which whitespace should be preserved.
... if there is more than one element, separate the names with a whitespace character.
... preserving whitespace is the default setting, so this element only needs to be used to counteract an <xsl:strip-space> element.
... syntax <xsl:preserve-space elements=list-of-element-names /> required attributes elements specifies the elements for which whitespace should be preserved.
Communicating With Other Scripts - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Guides › Content Scripts › Communicating With Other Scripts
cludes a button and a page script: <html> <head> <meta charset="utf-8"> </head> <body> <input id="message" type="button" value="send a message"/> <script type="text/javascript" src="page-script.js"></script> </body> </html> the content script "content-script.js" adds an event listener to the button, that sends a custom event containing a message: var messenger = document.getelementbyid("message"); messenger.addeventlistener("click", sendcustomevent, false); function sendcustomevent() { var greeting = {"greeting" : "hello world"}; var event = document.createevent('customevent'); event.initcustomevent("addon-message", true, true, greeting); document.documentelement.dispatchevent(event); } finally, the page script "page-script.js" listens for the message and logs the...
...from firefox 30 this sharing requires an extra step: the content script needs to explicitly clone the message payload into the page script's scope using the global cloneinto() function: var messenger = document.getelementbyid("message"); messenger.addeventlistener("click", sendcustomevent, false); function sendcustomevent() { var greeting = {"greeting" : "hello world"}; var cloned = cloneinto(greeting, document.defaultview); var event = document.createevent('customevent'); event.initcustomevent("addon-message", true, true, cloned); document.documentelement.dispatchevent(event); } messaging from page sc...
...js") }); the web page "talk.html" creates and dispatches a custom dom event, using initcustomevent()'s detail parameter to supply the payload: <!doctype html> <html> <head></head> <body> <script> function sendmessage() { var event = document.createevent('customevent'); event.initcustomevent("addon-message", true, true, { hello: 'world' }); document.documentelement.dispatchevent(event); } </script> <button onclick="sendmessage()">send message</button> </body> </html> finally, the content script "listen.js" listens for the new event and retrieves the payload from its detail attribute: window.addeventlistener("addon-message", function(event) { console.log(json.stringify(event.detail)); }, false); ...
Communicating using "port" - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Guides › Content Scripts › using port
"});" var pagemod = require('sdk/page-mod').pagemod({ include: ['*'], contentscript: pagemodscript, onattach: function(worker) { worker.port.on('click', function(html) { worker.port.emit('warning', 'do not click this again'); }); } }); in the add-on above there are two user-defined messages: click is sent from the page-mod to the add-on, when the user clicks an element in the page warning sends a silly string back to the page-mod port.emit() the port.emit() function sends a message from the "main.js", or another add-on module, to a content script, or vice versa.
... function getfirstparagraph() { var paras = document.getelementsbytagname('p'); console.log(paras[0].textcontent); self.port.removelistener("get-first-para", getfirstparagraph); } self.port.on("get-first-para", getfirstparagraph); the result is that the paragraph is only logged the first time the button is clicked.
... this example rewrites the "listener.js" content script in the port.removelistener() example so that it uses once(): function getfirstparagraph() { var paras = document.getelementsbytagname('p'); console.log(paras[0].textcontent); } self.port.once("get-first-para", getfirstparagraph); json-serializable values the payload for an message can be any json-serializable value.
Porting the Library Detector - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Guides › Porting the Library Detector
how the library detector works all the work is done inside a single file, librarydetector.xul this contains: a xul overlay a script the xul overlay adds a box element to the browser's status bar: the script does everything else.
... once the list is built, the switchlibraries() function constructs a xul statusbarpanel element for each library it found, populates it with the icon at the corresponding chrome:// url, and adds it to the box.
...this means we'll need two additional content scripts: one in the widget's context, which listens for icon mouseover events and sends a message to main.js containing the name of the corresponding library: function setlibraryinfo(element) { self.port.emit('setlibraryinfo', element.target.title); } var elements = document.getelementsbytagname('img'); for (var i = 0; i &lt; elements.length; i++) { elements[i].addeventlistener('mouseover', setlibraryinfo, false); } one in the panel, which updates the panel's content with the library information: self.on("message", function(libraryinfo) { window.document.body.innerhtml ...
XUL Migration Guide - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Guides › XUL Migration Guide
xul windows xul windows are used to define completely new windows to host user interface elements specific to the add-on.
... apis like ui and panel are very generic and with the right content can be used to replace many specific xul elements.
...here's a really simple example add-on that modifies the browser chrome using window/utils: function removeforwardbutton() { var window = require("sdk/window/utils").getmostrecentbrowserwindow(); var forward = window.document.getelementbyid('forward-button'); var parent = window.document.getelementbyid('urlbar-container'); parent.removechild(forward); } require("sdk/ui/button/action").actionbutton({ id: "remove-forward-button", label: "remove forward button", icon: "./icon-16.png", onclick: removeforwardbutton }); there are more useful examples of this technique in the jetpack wiki's collection of third party modu...
dev/panel - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › dev panel
anel.html", onready: function() { this.postmessage("message from the add-on"); } }); // export the constructor exports.mypanel = mypanel; // create a new tool, initialized // with the new constructor const mytool = new tool({ panels: { mypanel: mypanel } }); in the panel document script: // my-panel.js window.addeventlistener("message", function(event) { var content = document.getelementbyid("content"); content.textcontent = event.data; }); note that at the moment you have to pass an array of ports into postmessage, even if you don't need to use them: // main.js // require the sdk modules const { panel } = require("dev/panel"); const { tool } = require("dev/toolbox"); const { class } = require("sdk/core/heritage"); const mypanel = class({ extends: panel, label: "my pan...
... dispose: function() { this.debuggee = null; }, onready: function() { this.debuggee.start(); this.postmessage("port", [this.debuggee]); } }); // export the constructor exports.mypanel = mypanel; // create a new tool, initialized // with the new constructor const mytool = new tool({ panels: { mypanel: mypanel } }); in my-panel.js: // my-panel.js var content = document.getelementbyid("content"); window.addeventlistener("message", function(event) { var debuggee = event.ports[0]; console.log(debuggee); debuggee.onmessage = function(event) { content.textcontent = json.stringify(event.data); } debuggee.postmessage({ "to":"root", "type":"listtabs" }); }); if you do this, don't forget to call start() on the port before passing it over to the panel d...
...e this: <html> <head> <meta charset="utf-8"> <link href="./my-panel.css"rel="stylesheet"></link> <script src="resource://sdk/dev/volcan.js"></script> </head> <body> <div id = "content"></div> </body> <script src="./my-panel.js"></script> </html> here's a script that uses volcan.js to get the selected tab and display its url: // my-panel.js var content = document.getelementbyid("content"); window.addeventlistener("message", function(event) { var debuggee = event.ports[0]; volcan.connect(debuggee).
frame/hidden-frame - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › frame hidden-frame
xul <iframe> elements) that are not displayed to the user.
... the following code creates a hidden frame, loads a web page into it, and then logs its title: var hiddenframes = require("sdk/frame/hidden-frame"); let hiddenframe = hiddenframes.add(hiddenframes.hiddenframe({ onready: function() { this.element.contentwindow.location = "http://www.mozilla.org/"; let self = this; this.element.addeventlistener("domcontentloaded", function() { console.log(self.element.contentdocument.title); }, true, true); } })); see the panel module for a real-world example of usage of this module.
... properties element the host application frame in which the page is loaded.
frame/utils - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › frame utils
usage module exports create function that takes the nsidomdocument of a privileged document and creates a browser element in its documentelement: let { open } = require('sdk/window/utils'); let { create } = require('sdk/frame/utils'); let window = open('data:text/html,foo'); let frame = create(window.document); optionally create can be passed set of options to configure created frame even further.
... execution of scripts may easily be enabled: let { open } = require('sdk/window/utils'); let { create } = require('sdk/frame/utils'); let window = open('data:text/html,top'); let frame = create(window.document, { uri: 'data:text/html,<script>console.log("running");</script>', allowjavascript: true }); } globals functions create(document, options) creates a xul browser element in a privileged document.
... returns frame : the new browser element.
Displaying annotations - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Tutorials › Annotator › Displaying annotations
in this chapter we'll use a page-mod to locate elements of web pages that have annotations associated with them, and a panel to display the annotations.
... when a page is loaded the matcher searches the dom for elements that match annotations.
... if it finds any it binds functions to that element's mouseenter and mouseleave events to send messages to the main module, asking it to show or hide the annotation.
Display a Popup - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Tutorials › Display a Popup
the panel just contains a <textarea> element: when the user presses the return key, the contents of the <textarea> is sent to the main add-on code.
...var textarea = document.getelementbyid("edit-box"); textarea.addeventlistener('keyup', function onkeyup(event) { if (event.keycode == 13) { // remove the newline.
...self.port.on("show", function onshow() { textarea.focus(); }); finally, the "text-entry.html" file defines the <textarea> element: <html> <head> <style type="text/css" media="all"> textarea { margin: 10px; } body { background-color: gray; } </style> </head> <body> <textarea rows="13" cols="33" id="edit-box"></textarea> </body> </html> finally, save these three icon files to the "data" directory: icon-16.png icon-32.png ...
Bootstrapped extensions - Archive of obsolete content
Archive › Add-ons › Bootstrapped extensions
you need to look up the relevant application ui elements by their id by calling document.getelementbyid(), then manipulate them to inject your ui.
... for example, you can get access to the menu bar in firefox with document.getelementbyid("main-menubar").
... creating a bootstrapped extension to mark an extension as bootstrappable, you need to add the following element to its install manifest: <em:bootstrap>true</em:bootstrap> then you need to add a bootstrap.js file that contains the required functions; this should be alongside the install.rdf file in the extension's package.
Label and description - Archive of obsolete content
Archive › Add-ons › Code snippets › Label and description
to cause the text to wrap: ensure the long-running text is a text node child of <description/> or <label/> (i.e., do not specify the long-running text in the value attribute of these elements).
... the default style for these xul elements includes white-space: wrap;.
... absolutely nothing!</description> text can also be made to wrap by inserting an <html:br/> element regardless of the css style, but this creates a hard-break that does not change as parent elements resize.
LookupNamespaceURI - Archive of obsolete content
Archive › Add-ons › Code snippets › LookupNamespaceURI
addlookupnamespaceuri(doc); addlookupnamespaceuri(element); function addlookupnamespaceuri (type) { if (!type.prototype.lookupnamespaceuri) { type.prototype.lookupnamespaceuri = lookupnamespaceuri; } function lookupnamespaceuri (prefix) { return lookupnamespaceurihelper(this, prefix); } function lookupnamespaceurihelper (node, prefix) { // adapted directly from http://www.w3.org/tr/dom-level-3-core/namespaces-algori...
...thms.html#lookupnamespaceurialgo var i, att, htmlmode = document.contenttype, // mozilla only xmlnspattern = /^xmlns:(.*)$/; switch (node.nodetype) { case 1: // element_node (could also just test for node.element_node, etc., if supported in all browsers) if (node.namespaceuri != null && node.prefix === prefix) { // note: prefix could be "null" in the case we are looking for default namespace return node.namespaceuri; } if (node.attributes.length) { for (i = 0; i < node.attributes.length; i++) { att = node.attributes[i]; if (xmlnspattern.test(att.name) && xmlnspattern.exec(att.name)[1] === p...
... } } if (node.parentnode && node.parentnode.nodetype !== 9) { // entityreferences may have to be skipped to get to it return lookupnamespaceurihelper(node.parentnode, prefix); } return null; case 9: // document_node return lookupnamespaceurihelper(node.documentelement, prefix); case 6: // entity_node case 12: // notation_node case 10: // document_type_node case 11: // document_fragment_node return null; // unknown case 2: // attribute_node if (node.ownerelement) { return lookupnamespaceurihelper(node.ownerelement, prefix); } ...
LookupPrefix - Archive of obsolete content
Archive › Add-ons › Code snippets › LookupPrefix
tml#lookupnamespaceprefixalgo // (the above had a few apparent 'bugs' in the pseudo-code which were corrected here) if (node.lookupprefix && htmlmode !== 'text/html') { // shouldn't use this in text/html for mozilla as will return null return node.lookupprefix(namespaceuri); } if (namespaceuri === null || namespaceuri === '') { return null; } switch (node.nodetype) { case 1: // node.element_node return _lookupnamespaceprefix(namespaceuri, node); case 9: // node.document_node return _lookupnamespaceprefix(namespaceuri, node.documentelement); case 6: // node.entity_node case 12: // node.notation_node case 11: // node.document_fragment_node case 10: // node.document_type_node return null; // type is unknown case 2: // node.attribute_node if (node.ownerelement) ...
...{ return _lookupnamespaceprefix(namespaceuri, node.ownerelement); } return null; default: if (node.parentnode) { // entityreferences may have to be skipped to get to it return _lookupnamespaceprefix(namespaceuri, node.parentnode); } return null; } } // private function for lookupprefix only function _lookupnamespaceprefix (namespaceuri, originalelement) { var xmlnspattern = /^xmlns:(.*)$/; if (originalelement.namespaceuri && originalelement.namespaceuri === namespaceuri && originalelement.prefix && originalelement.lookupnamespaceuri(originalelement.prefix) === namespaceuri) { return originalelement.prefix; } if (originalelement.attributes && originalelement.attributes.length) { for (var i=0; i < originalelement.attributes.length; i++) { var att = orig...
...inalelement.attributes[i]; xmlnspattern.lastindex = 0; var localname = att.localname || att.name.substr(att.name.indexof(':')+1); // latter test for ie which doesn't support localname if (localname.indexof(':') !== -1) { // for firefox when in html mode localname = localname.substr(att.name.indexof(':')+1); } if ( xmlnspattern.test(att.name) && att.value === namespaceuri && lookupnamespaceuri(originalelement, localname) === namespaceuri ) { return localname; } } } if (originalelement.parentnode) { // entityreferences may have to be skipped to get to it return _lookupnamespaceprefix(namespaceuri, originalelement.parentnode); } return null; } ...
On page load - Archive of obsolete content
Archive › Add-ons › Code snippets › On page load
ul documents: application uri to overlay firefox chrome://browser/content/browser.xul thunderbird chrome://messenger/content/messenger.xul navigator from seamonkey chrome://navigator/content/navigator.xul attaching a script attach a script to your overlay (see "attaching a script to an overlay") that adds a load event listener to appcontent element (browsers) or messagepane (mail): window.addeventlistener("load", function load(event){ window.removeeventlistener("load", load, false); //remove listener, no longer needed myextension.init(); },false); var myextension = { init: function() { var appcontent = document.getelementbyid("appcontent"); // browser if(appcontent){ appcontent.addeventlistener("domcontentloaded"...
..., myextension.onpageload, true); } var messagepane = document.getelementbyid("messagepane"); // mail if(messagepane){ messagepane.addeventlistener("load", function(event) { myextension.onpageload(event); }, true); } }, onpageload: function(aevent) { var doc = aevent.originaltarget; // doc is document that triggered "onload" event // do something with the loaded page.
... // if (win.frameelement) return; // skip iframes/frames alert("page is loaded \n" +doc.location.href); } } window.addeventlistener("load", function load(event){ window.removeeventlistener("load", load, false); //remove listener, no longer needed myextension.init(); },false); references if you need to have a more complicated listener (not just onload), use progress listeners.
QuerySelector - Archive of obsolete content
Archive › Add-ons › Code snippets › QuerySelector
queryselector, or following the jquery style of chaining by returning 'this' within each prototype method of $()): htmldocument.prototype.$ = function (selector) { // only for html return this.queryselector(selector); }; example: <h1>test!</h1> <script> htmldocument.prototype.$ = function (selector) { return this.queryselector(selector); }; alert(document.$('h1')); // [object htmlheadingelement] </script> xuldocument.prototype.$ = function (selector) { // only for xul return this.queryselector(selector); }; example: <label value="test!"/> <script type="text/javascript"><![cdata[ xuldocument.prototype.$ = function (selector) { // only for xul return this.queryselector(selector); }; alert(document.$('label')); // [object xulelement] ]]></script> document.prototype.$ = functio...
...n (selector) { // only for plain xml return this.queryselector(selector); }; var foo = document.implementation.createdocument('somens', 'foo', null); // create an xml document <foo xmlns="somens"/> var bar = foo.createelementns('somens', 'bar'); // add <bar xmlns="somens"/> foo.documentelement.appendchild(bar); alert(foo.$('bar').nodename); // gives 'bar' element.prototype.$ = function (selector) { // works for html, xul, and plain xml return this.queryselector(selector); }; html example: <h1><a>test!<a/></h1> <script> element.prototype.$ = function (selector) { return this.queryselector(selector); }; alert(document.getelementsbytagname('h1')[0].$('a').nodename); // 'a' xul example: <hbox><vbox/></hbox> <script type="text/javascript"><![cdata[ element.prototype.$ = function (select...
...or) { return this.queryselector(selector); }; var xulns = 'http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul'; alert(document.getelementsbytagnamens(xulns, 'hbox')[0].$('vbox').nodename); // vbox ]]></script> xml example: <foo xmlns="somens"><bar/></foo> in document earlier var foo = document.getelementsbytagnamens('somens', 'foo')[0]; alert(foo.$('bar')); note that for plain xml, the # 'id' selector will not work with an 'id' attribute (since a such-named attribute need not necessarily be of type id in xml, though it is in html and xul), nor will it work with xml:id.
Rosetta - Archive of obsolete content
Archive › Add-ons › Code snippets › Rosetta
"); if (!odicts.hasownproperty(smimetype)) { alert("rosetta.translatescript() \u2013 unknown mime-type \"" + smimetype + "\": script ignored."); return; } var ocompiled = document.createelement("script"); oscript.parentnode.insertbefore(obaton, oscript); oscript.parentnode.removechild(oscript); for (var aattrs = oscript.attributes, nattr = 0; nattr < aattrs.length; nattr++) { ocompiled.setattribute(aattrs[nattr].name, aattrs[nattr].value); } ocompiled.type = "text\/ecmascript"; if (oxhr200) { ocompiled.src = "data:text\/javascript," + encodeuricomponent(o...
...getsource(oscript) : createscript(oscript); } } function parsedocument () { for ( var ascripts = document.getelementsbytagname("script"), nidx = 0; nidx < ascripts.length; parsescript(ascripts[nidx++]) ); } var odicts = {}, rignoremimes = /^\s*(?:text\/javascript|text\/ecmascript)\s*$/; this.translatescript = parsescript; this.translateall = parsedocument; this.appendcompiler = function (vmimetypes, fcompiler) { if (arguments.length < 2) { throw new typee...
...s a short list of the mime types associated to some programming languages: language mime type bash text/x-shellscript java text/x-java-source c text/x-c, text/x-csrc c++ text/x-c++, text/x-c++src python text/x-python there are no limitations to the mime types that can be used for the type attribute of the <script> element.
Tree - Archive of obsolete content
Archive › Add-ons › Code snippets › Tree
ew = tree.treeboxobject.view; for (var i = 0; i < treeview.rowcount; i++) { if (treeview.iscontainer(i) && treeview.iscontaineropen(i)) treeview.toggleopenstate(i); } getting the text from the selected row assuming the given <tree>: <tree id="my-tree" seltype="single" onselect="ontreeselected()"> use the following javascript: function ontreeselected(){ var tree = document.getelementbyid("my-tree"); var cellindex = 0; var celltext = tree.view.getcelltext(tree.currentindex, tree.columns.getcolumnat(cellindex)); alert(celltext); } getting the tree item from the focused row assuming <tree id="my-tree">, you can use the following to get the tree item: var view = document.getelementbyid("my-tree").view; var sel = view.selection.currentindex; //returns -1 if the tree ...
...instead, you can add the event handler to the <tree> element.
...for example, assuming the given <tree>: <tree id="my-tree" onclick="ontreeclicked(event)"> use the following javascript: function ontreeclicked(event){ var tree = document.getelementbyid("my-tree"); var tbo = tree.treeboxobject; // get the row, col and child element at the point var row = { }, col = { }, child = { }; tbo.getcellat(event.clientx, event.clienty, row, col, child); var celltext = tree.view.getcelltext(row.value, col.value); alert(celltext); } getting the selected indices of a multiselect tree var start = {}, end = {}, numranges = tree.view.selection.getrangecount(), selectedindices = []; for (var t = 0; t < numranges; t++){ tree.view.selection.getrangeat(t, start, end); f...
Inline options - Archive of obsolete content
Archive › Add-ons › Inline Options
.options2" type="radio" title="options 2"> <radiogroup> <radio value="false" label="disabled"/> <radio value="true" label="enabled"/> </radiogroup> </setting> <!-- button example - not tied to a preference, but attached to a command --> <setting title="do something" type="control"> <button id="myaddon-button" label="click me" oncommand="alert('thank you!');"/> </setting> setting element changed notifications most of the setting elements (it might be all i havent really looked), support oninputchanged attribute.
...the this value is the setting xul element.
...for example: var observer = { observe: function(asubject, atopic, adata) { if (atopic == "addon-options-displayed" && adata == "my_addon@my_domain") { var doc = asubject; var control = doc.getelementbyid("myaddon-pref-control"); control.value = "test"; } } }; services.obs.addobserver(observer, "addon-options-displayed", false); // don't forget to remove your observer when your add-on is shut down.
Connecting to Remote Content - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › Connecting to Remote Content
request.onload = function(aevent) { let responsexml = aevent.target.responsexml; let rootelement = responsexml.documentelement; if (rootelement && "parseerror" != rootelement.tagname) { let shopelements = rootelement.getelementsbytagname("shop"); let totalelement = rootelement.getelementsbytagname("total")[0]; window.alert(shopelements[1].getelementsbytagname("name")[0].firstchild.nodevalue); // => orange window.alert(totalelement.firstchild.nodevalue); ...
...in this example code, the first child of the xul document is appended to a xul element after the transformation.
... request.onload = function(aevent) { let responsexml = aevent.target.responsexml; let xulnode; // transform the xml document to a xul document xuldocument = xsltprocessor.transformtodocument(responsexml); // append the xul node to a xul element xulnode = document.adoptnode(xuldocument.firstchild); document.getelementbyid("foo").appendchild(xulnode); }; we effectively transformed the xml file into xul and integrated it into the ui.
User Notifications and Alerts - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › User Notifications and Alerts
the notificationbox element you have probably seen these before.
...the notificationbox elements can be obtained from the gbrowser object.
...on firefox 3 and above, this seems to have been corrected, using the panel element.
Adding preferences to an extension - Archive of obsolete content
Archive › Adding preferences to an extension
tion: function() { // because we may be called as a callback, we can't rely on // "this" referring to the right object, so we need to reference // it by its full name var symbol = stockwatcher.tickersymbol; var fullurl = "http://quote.yahoo.com/d/quotes.csv?f=sl1d1t1c1ohgv&e=.csv&s=" + symbol; function inforeceived() { var samplepanel = document.getelementbyid('stockwatcher2'); var output = httprequest.responsetext; if (output.length) { // remove any whitespace from the end of the string output = output.replace(/\w*$/, ""); // build the tooltip string var fieldarray = output.split(","); samplepanel.label = symbol + ": " + fieldarray[1]; samplepanel.tooltiptext = "chg: " + fieldar...
...the <hbox> element is used to lay out the user interface by indicating that the widgets inside it should be positioned horizontally, next to each other in the window.
...the preference property ties the textbox to the "pref_symbol" <preference> element and to the "extensions.stockwatcher2.symbol" preference.
Creating reusable content with CSS and XBL - Archive of obsolete content
Archive › Beginner tutorials › Using XBL from stylesheets
you can use css to provide content for selected elements, but the content is limited to text and images, and its positioning is limited to before or after the selected element.
...you can use xbl to link selected elements to their own: stylesheets content properties and methods event handlers because you avoid linking everything at the document level, you can make self-contained parts that are easy to maintain and reuse.
...gatekeeper/there.is.only.xul" xmlns:html="http://www.w3.org/1999/xhtml"> <binding id="square"> <resources> <stylesheet src="bind6.css"/> </resources> <content> <html:div anonid="square"/> <xul:button anonid="button" type="button"> <children/> </xul:button> </content> <implementation> <field name="square"><![cdata[ document.getanonymouselementbyattribute(this, "anonid", "square") ]]></field> <field name="button"><![cdata[ document.getanonymouselementbyattribute(this, "anonid", "button") ]]></field> <method name="dodemo"> <body><![cdata[ this.square.style.backgroundcolor = "#cf4" this.square.style.marginleft = "20em" this.button.setattribute("disabled", "true") settimeout...
XML data - Archive of obsolete content
Archive › Beginner tutorials › XML data
you want the document's info elements to be displayed like html paragraphs.
... in the document's stylesheet, you specify how info elements are to be displayed: info { display: block; margin: 1em 0; } the most common values for the display property are: block displayed like html's div (for headings, paragraphs) inline displayed like html's span (for emphasis within text) add your own style rules that specify the font, spacing and other details in the same way as for html.
... more details other values of display display the element like a list item, or like a component of a table.
Localizing an extension - Archive of obsolete content
Archive › Localizing an extension
note: you should use a unique id for each string bundle element for each file you use to avoid conflicts.
...we add to refreshinformation() the following code: var stringsbundle = document.getelementbyid("string-bundle"); var changestring = stringsbundle.getstring('changestring') + " "; var openstring = stringsbundle.getstring('openstring') + " "; var lowstring = stringsbundle.getstring('lowstring') + " "; var highstring = stringsbundle.getstring('highstring') + " "; var volumestring = stringsbundle.getstring('volumestring') + " "; this code gets a reference to the string bundle element...
... we added to stockwatcher2.xul by calling document.getelementbyid(), specifying the id "string-bundle".
Visualizing an audio spectrum - Archive of obsolete content
Archive › Misc top level › Visualizing Audio Spectrum
the function handling the loadedmetadata event stores the metadata of the audio element in global variables; the function for the mozaudioavailable event does an fft of the samples and displays them in a canvas.
... <!doctype html> <html> <head> <title>javascript spectrum example</title> </head> <body> <audio id="audio-element" src="song.ogg" controls="true" style="width: 512px;"> </audio> <div><canvas id="fft" width="512" height="200"></canvas></div> <script> var canvas = document.getelementbyid('fft'), ctx = canvas.getcontext('2d'), channels, rate, framebufferlength, fft; function loadedmetadata() { channels = audio.mozchannels; rate = audio.mozsamplerate; framebufferlength = audio.mozframebufferl...
... before drawing spectrum ctx.clearrect(0,0, canvas.width, canvas.height); for (var i = 0; i < fft.spectrum.length; i++ ) { // multiply spectrum by a zoom value magnitude = fft.spectrum[i] * 4000; // draw rectangle bars for each frequency bin ctx.fillrect(i * 4, canvas.height, 3, -magnitude); } } var audio = document.getelementbyid('audio-element'); audio.addeventlistener('mozaudioavailable', audioavailable, false); audio.addeventlistener('loadedmetadata', loadedmetadata, false); // fft from dsp.js, see below var fft = function(buffersize, samplerate) { this.buffersize = buffersize; this.samplerate = samplerate; this.spectrum = new float32array(buffersize/2); ...
Editor Embedding Guide - Archive of obsolete content
Archive › Mozilla › Editor Embedding Guide
getcommandstate "state_enabled"(boolean) docommand no parameters note see also cmd_removelist cmd_dt inserts list item (dt element).
... getcommandstate "state_enabled"(boolean) docommand no parameters note see also cmd_removelist cmd_dd inserts list item (dd element).
... first getnext (returns the next name in the name/value pair list) hasmoreelements getvaluetype (numeric enum type see nsicommandparams for values) if the name/value pair is known or it was obtained using the methods described above, it is possible to call the following methods: getbooleanvalue getlongvalue getdoublevalue getstringvalue getcstringvalue getisupportsvalue all of these take pointers to values except for getstringvalue which demands a reference to an ...
Menu - Archive of obsolete content
Archive › Mozilla › Jetpack › UI › Menu
xulid string the id of the menuitem's backing xul element, exposed for the benefit of advanced developers.
... to match links and all elements contained in links, use jetpack.menu.context.page.on("a[href], a[href] *").
...this is the context menu that appears when right-clicking on an element in firefox's interface, such as a bookmark on the bookmarks toolbar.
Porting NSPR to Unix Platforms - Archive of obsolete content
Archive › Mozilla › Porting NSPR to Unix Platforms
in particular, you need to figure out which element in the <tt>jmp_buf</tt> is the stack pointer.
... usually <tt>jmp_buf</tt> is an array of integers, and some platforms have a <tt>jb_sp</tt> macro that tells you which array element is the stack pointer.
...i usually print out every element in the <tt>jmp_buf</tt> and see which one is the closest to the address of a local variable (local variables are allocated on the stack).
Extensions - Archive of obsolete content
Archive › Mozilla › Prism › Extensions
one of prism's features is an extreme lack of ui elements, which means that trying to use the same overlays in firefox and prism is really not possible.
...prism does have a few ui elements, such as a toolbox, toolbar, menubar, popup menus, statusbar and a container for the browser.
... you can use these ui elements to merge in your extension ui.
Proxy UI - Archive of obsolete content
Archive › Mozilla › Proxy UI
camino configured in os (networking preferences) (recently added - some support for reading os and account settings.)ui elements preferences panel overview the ui is based on selecting a proxy mode, then filling out any additional needed information in "related" ui.
... "related" ui elements only two proxy modes have related ui.
... enabling and disabling related fields when a radio button is selected, the related ui elements are enabled (and editable).
RDF Datasource How-To - Archive of obsolete content
Archive › Mozilla › RDF Datasource How-To
deciding on a vocabulary the vocabulary is the set of properties that you will use to express relationships between elements (resources and literals) in your data model.
...it contains elements for authorship, subject, publication date, etc.
...starting with the resource that corresponds to the tree element, http://foo.bar.com/, the graph will be traversed and content will be constructed using the pattern specified within the template tags.
accesskey - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › accesskey
this should be one of the characters that appears in the label attribute for the element.
... on non-macintosh platforms, the character on the element's label matching the accesskey is underlined.
...when the user presses a modifier key specific to the platform (eg, control* on windows, command* on macintosh) and the access key, the element will be focused and/or activated from anywhere in the window.
button.type - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › button.type
place a menupopup element inside the button in this case.
...place a panel element inside the button.
... panel elements are popups that support any type of content.
dir - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › dir
« xul reference home dir type: one of the values below the direction in which the child elements of the element are placed.
... normal for scales, the scale's values are ordered from left to right (for horizontal scales) or from top to bottom (for vertical scales) for other elements, the elements are placed left to right or top to bottom in the order they appear in the xul code.
...for other elements, they are placed right to left or bottom to top.
equalsize - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › equalsize
« xul reference home equalsize type: one of the values below this attribute can be used to make the children of the element equal in size.
... always for a horizontally oriented element, this will make all of its children have the width of the widest child.
... for a vertically oriented element, this will make its children all have the height of the tallest child.
eventnode - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › eventnode
thus, if this attribute is not used, the tabbox or an element inside it must have the focus for the keyboard navigation to apply.
...tab navigation will occur as long as any element in the window is focused.
...tab navigation will occur as long as any element in the document is focused.
id - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › id
« xul reference home id type: unique id a unique identifier so that you can identify the element with.
... you can use this as a parameter to getelementbyid() and other dom functions and to reference the element in style sheets.
... example <button id="foo" label="click me" oncommand="dosomething()"/> <script> function dosomething(){ var mybutton = document.getelementbyid('foo'); mybutton.setattribute('label','the button was pressed'); } </script> a more abstract version of the above would be a <button id="foo" label="click me" oncommand="setwidgetlabel(this, 'i was pressed')"/> <script> function setwidgetlabel(idname, newcaption){ document.getelementbyid( idname.id ).setattribute('label',newcaption) } </script> not specifying the id attribute for a window or a prefwindow fills the console with the following warning message: warning: empty string passed to getelementbyid() see also name ...
label - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › label
« xul reference home label type: string the label that will appear on the element.
...for an editable menuitem element the value of this attribute is copied to the menulist.value property upon user selection of the menuitem.
... see also treeitem.label, <label> element examples in javascript <label value="whaw" id="the-big-label" command="the-big-button"/> <button id="the-big-button" label="click me" oncommand="alert(document.getelementbyid('the-big-label').value)"/> <label id="mylabel" value="my label"/> <button label="click me" oncommand="document.getelementbyid('mylabel').setattribute('value','value changed');" /> <checkbox label="my checkbox" id="mycheckbox"/> <button label="another click" oncommand="document.getelementbyid('mycheckbox').setattribute('label','still not checked');"/> <button label="show label of checkbox" oncommand="alert( document.getelementbyid('mycheckbox').getattribute('label') )"/> ...
ordinal - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › ordinal
« xul reference home ordinal type: string (representing an integer) an integer which specifies the position of the element within its parent.
... by default, elements appear in the order they appear in the xul code.
...note the default ordinal for elements is 1.
position - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › position
« xul reference home position type: string (representing an integer) when an element is in an overlay, the position is an index where the child is inserted.
... the position is one-based, so use a value of 1 to place the element at the beginning.
... this attribute is ignored if either an insertbefore or insertafter attribute matches an element.
rows - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › rows
« xul reference home rows type: integer the number of rows to display in the element.
... if the element contains more than this number of rows, a scrollbar will appear which the user can use to scroll to the other rows.
... to get the actual number of rows in the element, use the getrowcount method.
targets - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › targets
« xul reference home targets type: comma-separated list of element ids a comma-separated list of element ids that the command updater will update upon.
... if this attribute is not specified, or you set it to the value '*', all elements are valid.
... the command update will only occur when the event occurs to one of the specified elements.
template - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › template
« xul reference home template type: id for template generated elements, this attribute may optionally be placed on the root node (the element with the datasources attribute) to refer to a template that exists elsewhere in the xul code.
... this template attribute should be set to the id of the template element.
...if this attribute is not specified, there should be a template element directly inside the node.
textbox.onblur - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › textbox.onblur
prior to gecko 1.9 (firefox 3), the script code would execute in the context of the anonymous html <input> element inside the textbox binding.
... from gecko 1.9 to gecko 12.0 (firefox 12.0 / thunderbird 12.0 / seamonkey 2.9), the script code would actually execute twice, once in the context of the anonymous html <input> element and once in the context of the <textbox> element itself.
... as of gecko 13.0 (firefox 13.0 / thunderbird 13.0 / seamonkey 2.10), the script code only runs in the context of the <textbox> element, matching the behavior of all other event handlers.
textbox.onfocus - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › textbox.onfocus
prior to gecko 1.9 (firefox 3), the script code would execute in the context of the anonymous html <input> element inside the textbox binding.
... from gecko 1.9 to gecko 12.0 (firefox 12.0 / thunderbird 12.0 / seamonkey 2.9), the script code would actually execute twice, once in the context of the anonymous html <input> element and once in the context of the <textbox> element itself.
... as of gecko 13.0 (firefox 13.0 / thunderbird 13.0 / seamonkey 2.10), the script code only runs in the context of the <textbox> element, matching the behavior of all other event handlers.
Working With Directories - Archive of obsolete content
Archive › Mozilla › XUL › FileGuide › Directories
function getlatestfile() { var lastmod = 0; var homedir = io.getfile("home", ""); var items = homedir.directoryentries; while (items.hasmoreelements()) { var item = items.getnext().queryinterface(components.interfaces.nsifile); if (item.isfile() && item.lastmodifiedtime > lastmod.lastmodifiedtime) lastmod = item; } return lastmod; } this example iterates through the files in the home directory and looks for the file with the latest modification time (the last file in that directory that was written to).
... as the directoryentries (nsifile.attributes) property is an enumeration, you can iterate over the items by using nsisimpleenumerator.hasmoreelements() and nsisimpleenumerator.getnext().
...the following example returns an array of all of a directory's subdirectories: function getsubdirs() { var arr = []; var items = io.getfile("home", "").directoryentries; while (items.hasmoreelements()) { var item = items.getnext(); if (item.isdirectory()) arr.push(item); } return arr; } ...
Menus - Archive of obsolete content
Archive › Mozilla › XUL › Firefox menus
firefox menus element id description main-menubar the menubar element.
... firefox context menu element id description relevant context contentareacontextmenu the popup for the context menu when a web page is displayed in the browser area.
... views the selection source selection context-viewpartialsource-mathml views the mathml source mathml context-viewsource views the source context-viewinfo views the page info context-metadata views the properties context-spell-check-enabled spell check enabled checkbox context-inspect inspects the element ...
appendItem - Archive of obsolete content
Archive › Mozilla › XUL › Method › appendItem
« xul reference home appenditem( label, value ) return type: element creates a new item and adds it to the end of the existing list of items.
...the function returns the newly created element.
... example <script language="javascript"> function additemstolist(){ var list = document.getelementbyid('mymenulist'); // add item with just the label list.appenditem('one'); // add item with label and value list.appenditem('two', 999); // select the first item list.selectedindex = 0; } </script> <button label="add items" oncommand="additemstolist()"/> <menulist id="mymenulist"> <menupopup/> </menulist> see also insertitemat() removeitemat() ...
appendNotification - Archive of obsolete content
Archive › Mozilla › XUL › Method › appendNotification
« xul reference home appendnotification( label , value , image , priority , buttons, eventcallback ) return type: element create a new notification and display it.
...keep in mind that this is all xul so using html elements for styling might still need additional css in order to work as you might expect.
... the element which was the target of the button press event.
insertItemAt - Archive of obsolete content
Archive › Mozilla › XUL › Method › insertItemAt
« xul reference home insertitemat( index, label, value ) return type: element this method creates a new item and inserts it at the specified position.
...the new item element is returned.
... note: you cannot insert an item to an index that does not exist, eg: trying to insert an item at the end with element.getrowcount() + 1 example <!-- this example inserts at the selected item or appends, then selects the newly created item --> <script language="javascript"> function insertitemtolist(){ var mylistbox = document.getelementbyid('mylistbox'); // create a date to get some labels and values var somedate = new date(); if(mylistbox.selectedindex == -1){ // no item was selected in list so append to the end mylistbox.appenditem( somedate.tolocaletimestring(), somedate.gettime() ); var newindex = mylistbox.getrowcount() -1 }else{ // item was selected so insert at the selected item var newindex = mylistbox.selectedindex...
controllers - Archive of obsolete content
Archive › Mozilla › XUL › Property › controllers
« xul reference controllers type: nsicontrollers a controllers list attached to the element.
...the document's command dispatcher will locate controllers to handle a command by using the focused element's list.
... example <window id="controller-example" title="controller example" onload="init();" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <script> function init() { var list = document.getelementbyid("thelist"); var listcontroller = { supportscommand : function(cmd){ return (cmd == "cmd_delete"); }, iscommandenabled : function(cmd){ if (cmd == "cmd_delete") return (list.selecteditem != null); return false; }, docommand : function(cmd){ list.removeitemat(list.selectedindex); }, onevent : function(evt){ } }; list.controllers.appendcontroller(listcontroller); } </script> <listbox id="thelist"> <listitem label="ocean"/> <listitem label="desert"/> <listitem label="jungle"/> <listitem label="swamp"/> </listbox...
Attribute Substitution - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Attribute Substitution
it may be desirable to have longer text wrap by placing it as the content of a description element.
...however, the textnode element is not copied into the generated content, but instead a dom text node is created with the value of the value attribute as its contents.
...the bug is that this code path for bindings doesn't handle the textnode element properly.
Multiple Rule Example - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Multiple Rule Example
<vbox id="photoslist" align="start" datasources="template-guide-photos5.rdf" ref="http://www.xulplanet.com/rdf/myphotos"> <template> <rule> <conditions> <content uri="?start"/> <member container="?start" child="?photo"/> <triple subject="?photo" predicate="http://purl.org/dc/elements/1.1/title" object="?title"/> <triple subject="?photo" predicate="http://purl.org/dc/elements/1.1/description" object="?description"/> <triple subject="?photo" predicate="http://purl.org/dc/elements/1.1/date" object="?date"/> </conditions> <action> <hbox uri="?photo" class="box-padd...
... <groupbox> <caption label="photo details"/> <label value="?description"/> <label value="date: ?date"/> </groupbox> </hbox> </action> </rule> <rule> <conditions> <content uri="?start"/> <member container="?start" child="?photo"/> <triple subject="?photo" predicate="http://purl.org/dc/elements/1.1/title" object="?phototitle"/> </conditions> <action> <vbox uri="?photo" class="box-padded"> <label value="?phototitle"/> <image src="?photo"/> </vbox> </action> </rule> </template> </vbox> in this example, the first rule matches only those photos with title, description, and date properties.
...if the last rule has no specific conditions (for example a simple rule with no attributes on the <rule> element), it could be considered to be the final else block that matches all data.
XUL Accesskey FAQ and Policies - Archive of obsolete content
Archive › Mozilla › XUL › XUL Accesskey FAQ and Policies
an accesskey is an underlined letter in a web page, menu or dialog that indicates to a user a quick, keyboard method of simulating a click on that element.
... common elements that don't get accesskeys ok buttons.
...look for dependencies of bug 129179 (the xul accesskey hookup meta bug), or look for bugs with "accesskey" or "mnemonic" in the summary, or look for dialogs where there are no elements with underlined letters.
assign - Archive of obsolete content
Archive › Mozilla › XUL › assign
any namespace prefixes declared on the element may be used within the expression.
... inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobj...
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
bbox - Archive of obsolete content
Archive › Mozilla › XUL › bbox
it is equivalent to using an hbox element with an align attribute set to baseline.
... examples (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, database, datasources, dir, , , flex, height, hidden,...
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
broadcasterset - Archive of obsolete content
Archive › Mozilla › XUL › broadcasterset
« xul reference home [ examples | attributes | properties | methods | related ] a container element for broadcaster elements.
... examples (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , ,...
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
grippy - Archive of obsolete content
Archive › Mozilla › XUL › grippy
« xul reference home [ examples | attributes | properties | methods | related ] an element that may be used inside a splitter which can be used to collapse a sibling element of the splitter.
... examples (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, d...
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
listcol - Archive of obsolete content
Archive › Mozilla › XUL › listcol
lexible --> <listbox> <listhead> <listheader label="first"/> <listheader label="last"/> </listhead> <listcols> <listcol flex="1"/> <listcol/> </listcols> <listitem> <listcell label="buck"/> <listcell label="rogers"/> </listitem> <listitem> <listcell label="john"/> <listcell label="painter"/> </listitem> </listbox> attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, remove...
...element, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, database, datasources, dir, , , flex, height, hidden, id, , , left, , maxheight, maxwidth, menu, minheight, minwidth, , , , , , , observes, ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getcli...
...entrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattributenode(), removeattributens(), removechild(), removeeventlistener(), replacechild(), setattribute(), setattributenode(), setattributenodens(), setattributens(), setuserdata related elements listbox, listcell, listcols, listhead, listheader, listitem ...
queryset - Archive of obsolete content
Archive › Mozilla › XUL › queryset
« xul reference home [ examples | attributes | properties | methods | related ] a container for query elements when more than one query is used.
... attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, database, datasources, dir, , , flex...
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
scrollcorner - Archive of obsolete content
Archive › Mozilla › XUL › scrollcorner
« xul reference home [ examples | attributes | properties | methods | related ] this element is used for the small box where the horizontal and vertical scrollbars meet.
... examples (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, database, datasources, dir, , , flex, height, hidden,...
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
spinbuttons - Archive of obsolete content
Archive › Mozilla › XUL › spinbuttons
spin buttons are not used as separate elements, but are used in combination with other elements to create a control that can be increased and decreased.
... attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, co...
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
stringbundleset - Archive of obsolete content
Archive › Mozilla › XUL › stringbundleset
« xul reference home [ examples | attributes | properties | methods | related ] a container for stringbundle elements.
... examples (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, database, datasources, dir, , , flex, height, hidden,...
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
toolbarpalette - Archive of obsolete content
Archive › Mozilla › XUL › toolbarpalette
examples <toolbarpalette id="browsertoolbarpalette"> <toolbarbutton id="toolbarpalette-button" class="toolbarbutton-class" label="&mylabel;" tooltiptext="&mytiptext;" oncommand="somefunction()"/> </toolbarpalette> attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, remove...
...element, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width properties inherited properties align, , allowevents, , boxobject, builder, , , , classname, , , , , collapsed, contextmenu, controllers, database, datasources, dir, , , flex, height, hidden, id, , , left, , maxheight, maxwidth, menu, minheight, minwidth, , , , , , , observes, ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getcli...
...entrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattributenode(), removeattributens(), removechild(), removeeventlistener(), replacechild(), setattribute(), setattributenode(), setattributenodens(), setattributens(), setuserdata related elements toolbar, toolbarbutton, toolbargrippy, toolbaritem, toolbarseparator, toolbarset, toolbarspacer, toolbarspring, toolbox ...
NPWindow - Archive of obsolete content
Archive › Plugins › Reference › NPWindow
width; /* maximum window size */ uint32_t height; nprect cliprect; /* clipping rectangle coordinates */ #ifdef xp_unix void * ws_info; /* platform-dependent additional data */ #endif /* xp_unix */ npwindowtype type; /* window or drawable target */ } npwindow; fields the data structure has the following fields: window platform-specific handle to a native window element in the netscape window hierarchy on windows (hwnd) and unix (x window id).
...clipping to the cliprect prevents the plug-in from overwriting the status bar, scroll bars, and other page elements when partially scrolled off the screen.
...the plug-in area is a native window element on windows and unix, or a rectangle within a native window on mac os.
What is RSS - Archive of obsolete content
Archive › RSS › Getting Started › What is RSS
and although these are each different, they all label themselves as rss 2.0 on the <rss> element.
...in fact, the only real difference between the news/blogger rss and the internet radio/internet television rss is that the news/blogger rss uses the <link> element and the internet radio/internet television rss uses the <enclosure> element.
...when you create your own rss feeds, you will likely want to make them more complex than these and include additional rss elements and make use of the various rss modules.
Atomic RSS - Archive of obsolete content
Archive › RSS › Module › Atom
it brings in atom elements into rss, adding the advantages of atom to rss while maintaining backwards compatibility.
... documentation selected articles atomic rss tim bray talks about using atom 1.0 as a micro format and extension module for rss 2.0; keeping rss 2.0 as your sydication format but bringing in and using selected atom 1.0 elements.
... references atomic rss element list examples none available at this time community none available at this time tools none available at this time other resources tim bray's atom rss article rss, atom, rdf, xml ...
Proposal - Archive of obsolete content
Archive › RSS › Proposal
in development rsshints a module that adds elements to a feed that help an aggregator process them.
... draft exists source guid when an rss item is posted in response to a previous item (called the source item) rss 2.0 offers the source element which allows the item to refer to the rss feed which contains the source item.
... the sguid specification provides a more granular approach by offering an sourceref element which can reference the guid permalink of the source.
Making sure your theme works with RTL locales - Archive of obsolete content
Archive › Themes › Making sure your theme works with RTL locales
gecko 1.9.1 (firefox 3.5) and earlier the chromedir attribute firefox, thunderbird and seamonkey expose an attribute named chromedir on certain elements.
... note that not all elements will have the chromedir attribute, so you may need to refer to an ancestor element that does.
... for example: /* we want to apply a rtl rule to #c; neither it nor its * parent element #b has a chromedir attribute, but its * grandparent element #a does.
Theme changes in Firefox 3.5 - Archive of obsolete content
Archive › Themes › Theme changes in Firefox 3.5
affected files details scrollbar.xml, xulscrollbars.css the <gripper> element was removed from the scrollbar thumb button by bug 448704.
...if you don't want the shadow, you can turn it off by setting the new -moz-window-shadow css property to none on the affected element.
... browser.xul bug 463189 added a new attribute on the xul window element of browser.xul named browsingmode.
Summary of Changes - Archive of obsolete content
Archive › Using Web Standards in your Web Pages › Summary of Changes
this section outlines all of the element and practice updates described in this article.
... proprietary or deprecated feature w3c feature or recommended replacement deprecated font html 4.01 span plus css1 color: ; font-family: ; font-size: ; deprecated center or align="center" css1 text-align: center; for in-line elements like text or image deprecated center or align="center" css1 margin-left: auto; margin-right: auto; for block-level elements deprecated bgcolor css1 background-color: ; non-standard embed html 4.01 object deprecated applet html 4.01 object non-standard marquee html 4.01 div plus scripting non-standard bgsound html 4.01 object proprietary or deprecated featur...
...e w3c feature or recommended replacement ie5+ id_attribute_value document.all.id_attribute_value document.all[id_attribute_value] dom level 2: document.getelementbyid(id_attribute_value) ie5+ formname.inputname.value dom level 1: document.forms["formname"].inputname.value ie5+ inputname.value dom level 1: document.forms["formname"].inputname.value ie5+ formctrlname dom level 1: document.forms["formname"].formctrlname ie5+ document.forms(0) dom level 1: document.forms[0] ie elemref.innertext dom level 1 (core) interface we could introduce dom 3 core textcontent attribute here which is supported by mozilla 1.5+ and is a perfect equivalent to innertext.
-moz-binding - Archive of obsolete content
Archive › Web › CSS › -moz-binding
the -moz-binding css property is used by mozilla-based applications to attach an xbl binding to a dom element.
... none no xbl binding is applied to the element.
... formal definition initial valuenoneapplies toall elements except generated content or pseudo-elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <url> | none examples .exampleone { -moz-binding: url(http://www.example.org/xbl/htmlbindings.xml#radiobutton); } specifications not part of any standard.
-ms-accelerator - Archive of obsolete content
Archive › Web › CSS › -ms-accelerator
initial valuefalseapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete syntax /* the object is not a keyboard shortcut (the default) */ -ms-accelerator: false /* the object is a keyboard shortcut */ -ms-accelerator: true values false the object is not a keyboard shortcut.
... formal syntax false | true examples this example uses the -ms-accelerator attribute in a <u> element to specify that the "n" in the <label> element is a keyboard shortcut.
...when alt + n is pressed, the <input> element that defines an accesskey attribute value of "n" receives the focus.
-ms-content-zoom-limit-min - Archive of obsolete content
Archive › Web › CSS › -ms-content-zoom-limit-min
initial value100%applies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednopercentagesthe smallest allowed zoom factor.
...this property has no effect on non-zoomable elements.
... see -ms-content-zooming for details on zoomable elements.
-ms-content-zoom-limit - Archive of obsolete content
Archive › Web › CSS › -ms-content-zoom-limit
initial valueas each of the properties of the shorthand:-ms-content-zoom-limit-max: 400%-ms-content-zoom-limit-min: 100%applies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednopercentagesas each of the properties of the shorthand:-ms-content-zoom-limit-max: the largest allowed zoom factor.
... remarks this property has no effect on non-zoomable elements.
... see -ms-content-zooming for details on zoomable elements.
-ms-content-zoom-snap-points - Archive of obsolete content
Archive › Web › CSS › -ms-content-zoom-snap-points
initial valuesnapinterval(0%, 100%)applies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values snapinterval( <percentage>, <percentage> ) specifies where the snap-points will be placed.
... remarks this property has no effect on non-zoomable elements.
... see -ms-content-zooming for details on zoomable elements.
-ms-content-zoom-snap-type - Archive of obsolete content
Archive › Web › CSS › -ms-content-zoom-snap-type
initial valuenoneapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values none initial value.
... remarks this property has no effect on non-zoomable elements.
... see -ms-content-zooming for details on zoomable elements.
-ms-content-zoom-snap - Archive of obsolete content
Archive › Web › CSS › -ms-content-zoom-snap
initial valueas each of the properties of the shorthand:-ms-content-zoom-snap-type: none-ms-content-zoom-snap-points: snapinterval(0%, 100%)applies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas each of the properties of the shorthand:-ms-content-zoom-snap-type: as specified-ms-content-zoom-snap-points: as specifiedanimation typediscrete syntax the -ms-content-zoom-snap shorthand property is specified as one or both of the following content zoom snap values, in order, separated by spaces.
... remarks this property has no effect on non-zoomable elements.
... see -ms-content-zooming for details on zoomable elements.
-ms-ime-align - Archive of obsolete content
Archive › Web › CSS › -ms-ime-align
the -ms-ime-align css property is a microsoft extension aligning the input method editor (ime) candidate window box relative to the element on which the ime composition is active.
... initial valueautoapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete syntax /* keyword values */ -ms-ime-align: auto; -ms-ime-align: after; values auto initial value.
... after the ime should attempt to align the candidate window below the element (in left-to-right and right-to-left layouts).
-ms-scroll-limit-x-max - Archive of obsolete content
Archive › Web › CSS › -ms-scroll-limit-x-max
the -ms-scroll-limit-x-max css property is a microsoft extension that specifies the maximum value for the element.scrollleft property.
... initial valueautoapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values auto the maximum value for the scrollleft property is equal to element.scrollwidth.
... remarks this property has no effect on non-scrollable elements.
-ms-scroll-limit-x-min - Archive of obsolete content
Archive › Web › CSS › -ms-scroll-limit-x-min
the -ms-scroll-limit-x-min css property is a microsoft extension that specifies the minimum value for the element.scrollleft property.
... initial value0applies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values <length> the minimum value for the scrollleft property.
... remarks this property has no effect on non-scrollable elements.
-ms-scroll-limit-y-max - Archive of obsolete content
Archive › Web › CSS › -ms-scroll-limit-y-max
the -ms-scroll-limit-y-max css property is a microsoft extension that specifies the maximum value for the element.scrolltop property.
... initial valueautoapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values auto the maximum value for the scrolltop property is equal to element.scrollheight.
... remarks this property has no effect on non-scrollable elements.
-ms-scroll-limit-y-min - Archive of obsolete content
Archive › Web › CSS › -ms-scroll-limit-y-min
the -ms-scroll-limit-y-min css property is a microsoft extension that specifies the minimum value for the element.scrolltop property.
... initial value0applies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values <length> the minimum value for the scrolltop property.
... remarks this property has no effect on non-scrollable elements.
-ms-scrollbar-3dlight-color - Archive of obsolete content
Archive › Web › CSS › -ms-scrollbar-3dlight-color
initial valuedepends on user agentapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values <color> the color of the top and left edges of the scroll box and scroll arrows of the scroll bar.
...)where <alpha-value> = <number> | <percentage><hue> = <number> | <angle> examples the following example shows how to create a style rule that sets the -ms-scrollbar-3dlight-color property for a <textarea> element.
...*/ } </style> </head> <body> <textarea class="blue3dlight">the top and left edges of the thumb and button-face elements in the scroll bar for this element will be blue.</textarea> </body> </html> specifications not part of any specification.
-ms-scrollbar-darkshadow-color - Archive of obsolete content
Archive › Web › CSS › -ms-scrollbar-darkshadow-color
initial valuethreeddarkshadowapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values <color> the color of the scroll bar's gutter.
...)where <alpha-value> = <number> | <percentage><hue> = <number> | <angle> examples the following example shows how to create a style rule that sets the -ms-scrollbar-darkshadow-color property for a <textarea> element.
... code example: http://samples.msdn.microsoft.com/workshop/samples/author/dhtml/refs/scrollbarcolor.htm <!doctype html> <html> <head> <title>scrollbar-darkshadow-color</title> <style> .blueshadow { scrollbar-darkshadow-color: blue; } </style> </head> <body> <textarea class="blueshadow">the gutter elements in the scroll bar for this element will be blue.</textarea> </body> </html> specifications not part of any specification.
-ms-scrollbar-shadow-color - Archive of obsolete content
Archive › Web › CSS › -ms-scrollbar-shadow-color
initial valuethreeddarkshadowapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values <color> the color of the bottom and right edges of the scroll box and scroll arrows of a scroll bar.
...)where <alpha-value> = <number> | <percentage><hue> = <number> | <angle> examples the following example shows how to create a style rule that sets the -ms-scrollbar-shadow-color property for a <textarea> element.
... <!doctype html> <html> <head> <title>scrollbar-shadow-color</title> <style> .blueshadow { scrollbar-shadow-color: blue; } </style> </head> <body> <textarea class="blueshadow">the gutter elements in the scroll bar for this element will be blue.</textarea> </body> </html> specifications not part of any specification.
-ms-scrollbar-track-color - Archive of obsolete content
Archive › Web › CSS › -ms-scrollbar-track-color
the -ms-scrollbar-track-color css property is a microsoft extension that specifies the color of the track element of a scrollbar.
... initial valuescrollbarapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values <color> the color of the track element.
...)where <alpha-value> = <number> | <percentage><hue> = <number> | <angle> examples this example uses -ms-scrollbar-track-color, -ms-scrollbar-face-color, and -ms-scrollbar-arrow-color to create two <div> elements with different scroll bar color schemes.
:-moz-system-metric() - Archive of obsolete content
Archive › Web › CSS › :-moz-system-metric
syntax values -moz-windows-compositormedia: media/visual accepts min/max prefixes: no:-moz-system-metric(images-in-menus)the :-moz-system-metric(images-in-menus) css pseudo-class matches an element if the computer's user interface supports images in menus.:-moz-system-metric(mac-graphite-theme):-moz-system-metric(mac-graphite-theme) will match an element if the user has chosen the "graphite" appearance in the "appearance" prefpane of the mac os x system preferences.:-moz-system-metric(scrollbar-end-backward)the :-moz-system-metric(scrollbar-end-backward) css pseudo-class will match an eleme...
...nt if the computer's user interface includes a backward arrow button at the end of scrollbars.:-moz-system-metric(scrollbar-end-forward)the :-moz-system-metric(scrollbar-end-forward) css pseudo-class will match an element if the computer's user interface includes a forward arrow button at the end of scrollbars.:-moz-system-metric(scrollbar-start-backward)the :-moz-system-metric(scrollbar-start-backward) css pseudo-class will match an element if the computer's user interface includes a backward arrow button at the start of scrollbars.:-moz-system-metric(scrollbar-start-forward)the :-moz-system-metric(scrollbar-start-forward) css pseudo-class will match an element if the computer's user interface includes a forward arrow button at the start of scrollbars.:-moz-system-metric(scrollbar-thumb-proporti...
...onal)the :-moz-system-metric(scrollbar-thumb-proportional) css pseudo-class will match an element if the computer's user interface uses proportional scrollbar thumbs; that is, the draggable thumb on the scrollbar resizes to indicate the relative size of the visible area of the document.:-moz-system-metric(touch-enabled)the :-moz-system-metric(touch-enabled) css pseudo-class will match an element if the device on which the content is being rendered offers a supported touch-screen interface.:-moz-system-metric(windows-default-theme)the :-moz-system-metric(windows-default-theme) css pseudo-class matches an element if the user is currently using one of the following themes in windows: luna, royale, zune, or aero (i.e., vista basic, vista standard, or aero glass).
E4X for templating - Archive of obsolete content
Archive › Web › E4X › E4X for templating
.length); } return strs.getstringfromname(msg); } for example, <toolbarbutton label={$s('mytoolbar.label')}/> conditionals function _if (cond, h, _else) { if (cond && cond != undefined) { // we need undefined condition for e4x return h(cond); } else if (_else) { return _else(cond); } return ''; // empty string allows conditions in attribute as well as element content } for example: {_if(elems.length(), function () <description>{elems[0]}</description>, function _else () <label>no data</label> )} note that the simple xmllist() constructor (<></>) may be useful to still be able to use an expression closure (i.e., without needing return statements and braces): {_if(elems.length(), function () <> <markup/> <markup/> </>)} note...
... ++it; } } else { for (k in arr) { if (it < min) { ++it; continue; } if (it > max) { break; } ret+=h(k, arr[k], it, lev); ++it; } } return ret; } the following real case example iterates over an array of the lines in an e4x child element to produce an xmllist of multiple vbox's representing each line: <vbox> {foreach(e(someel.somechild[0]).split('\n'), function (line) <description>{line}</description> )} </vbox> the following example shows iteration over an e4x object itself: {foreach(elems, function (k, elem, iter) <> <row>{k}: {elem}</row> <row><image src="chrome://myext/skin/images/fillerrow.jpg" /></row> </>)...
...} or if the e4x child element had its own children and text: {foreach(elems, function (k, elem, iter) <> <row>{k}: {elem.text()} {elem.somechild}</row> <row><image src="chrome://myext/skin/images/fillerrow.jpg" /></row> </>)} sorting /* @param {xmllist} xmllist the xmllist to sort @param {function} h the sorting handler */ function sort (xmllist, h) { var k, arr=[], ret = <></>; for (k in xmllist) { if (xmllist.hasownproperty(k)) { arr.push(xmllist[k]); } } arr.sort(h).foreach(function (item) { if (typeof item === 'xml') { ret += item; } else if (typeof item === 'string') { ret += new xml(item); } else { var ser = (new xmlserializer()).serializetostring(item); ...
Window.importDialog() - Archive of obsolete content
Archive › Web › Window.importDialog
example var dialog = importdialog(null, "chrome://myextension/content/dialog.xul", myobject); notes the xul passed to importdialog() is very similar to xul passed to window.opendialog(), with some limitations and caveats: only <dialog> top level elements are permitted.
... scripts are loaded via an attribute on the <dialog> element, not via the <script> tag.
...because of this, element id and javascript conflicts are possible, just like overlays.
Requests For Enhancement - Archive of obsolete content
Archive › Web › XForms › RFE
natively, the mozilla xforms implementation supports xforms elements being hosted in xhtml and xul documents.
...our custom control interfaces allows for the exchange of data between any xml element and and an xforms model.
... enhancements of xforms elements if you find that none of the elements proposed by the xforms spec address your requirements, please post your usecase here.
Correctly Using Titles With External Stylesheets - Archive of obsolete content
Archive › Web Standards › Correctly Using Titles With External Stylesheets
external stylesheets are often associated with html documents using the <link rel="stylesheeet"> element, but it is important to use the element's title attribute properly.
... this is because the title attribute on a <link rel="stylesheeet"> element makes it either preferred or an alternative style sheet.
...any link element referring to a stylesheet with a title attribute must be either preferred or alternate, depending on the value of the rel attribute.
Async scripts for asm.js - Game development
Games › Techniques › Async scripts
putting async into action getting async compilation is easy: when writing your javascript, just use the async attribute like so: <script async src="file.js"></script> or, to do the same thing via script: var script = document.createelement('script'); script.src = "file.js"; document.body.appendchild(script); (scripts created from script default to async.) the default html shell emscripten generates produces the latter.
... two common situations in which a script is *not* async (as defined by the html spec) are: <script async>code</script> and var script = document.createelement('script'); script.innerhtml = "code"; document.body.appendchild(script); both are counted as 'inline' scripts and get compiled and then run immediately.
...instead of using eval or innerhtml, both of which trigger synchronous compilation, you should use a blob with an object url: var blob = new blob([codestring]); var script = document.createelement('script'); var url = url.createobjecturl(blob); script.onload = script.onerror = function() { url.revokeobjecturl(url); }; script.src = url; document.body.appendchild(script); the setting of src rather than innerhtml is what makes this script async.
Mobile touch controls - Game development
Games › Techniques › Control mechanisms › Mobile touch
pure javascript approach we could implement touch events on our own — setting up event listeners and assigning relevant functions to them would be quite straightforward: var el = document.getelementsbytagname("canvas")[0]; el.addeventlistener("touchstart", handlestart); el.addeventlistener("touchmove", handlemove); el.addeventlistener("touchend", handleend); el.addeventlistener("touchcancel", handlecancel); this way, touching the game's <canvas> on the mobile screen would emit events, and thus we could manipulate the game in any way we want (for example, moving the space ship around).
... to see if it's working correctly we can output the x and y positions using the output element.
...the pointer element contains the x and y variables storing the current position of the dragged element.
Crisp pixel art look with image-rendering - Game development
Games › Techniques › Crisp pixel art look
the steps to achieve this effect are: create a <canvas> element and set its width and height attributes to the original, smaller resolution.
... set the <canvas> element's image-rendering css property to some value that does not make the image blurry.
...as: <canvas id="game" width="128" height="128"></canvas> css to size the canvas and render a crisp image: canvas { width: 512px; height: 512px; image-rendering: -moz-crisp-edges; image-rendering: -webkit-crisp-edges; image-rendering: pixelated; image-rendering: crisp-edges; } and some javascript to set up the canvas and load the image: // get canvas context var ctx = document.getelementbyid('game').getcontext('2d'); // load image var image = new image(); image.onload = function () { // draw the image into the canvas ctx.drawimage(image, 0, 0); } image.src = 'https://udn.realityripple.com/samples/11/a2954fe197.png'; this code used together produces the following result: note: you can check out the original code on github (and a live example.) ...
Gecko FAQ - Gecko Redirect 1
Gecko › FAQ
by the end of calendar year 2000, gecko is expected to support the following recommended open internet standards fully except for the areas noted below and open bugs documented in bugzilla: html 4.0 - full support except for: elements: bdo, basefont attributes: shape attribute on the a element, abbr, axis, headers, scope-row, scope-col, scope-rowgroup, scope-colgroup, charoff, datasrc, datafld, dataformat, datapagesize, summary, event, dir, align on table columns, label attribute of option, alternate text of area elements, longdesc various metadata attributes: cite, datetime, lang, hreflang bidirectional text layout,...
... which is only used in hebrew and arabic (ibm has begun work to add bidi support in a future release) style sheets css 1 - full support, except for: the application of styles to html column elements the ability to turn off author styles the names of certain mozilla extension pseudo-classes lack the moz- prefix css 2 - partial support is expected and has already been built into gecko, including support for css2 positioning, but no commitment has been made to achieve a specific level of support dom level 0 level 1 core: full support making entityreferences available through dom1; per a provision of the dom1 spec for xml implementations, entities will be automatically expanded inline and therefore not available through dom1; our im...
... layout component tracks content layout bugs that may be related to a variety of specifications html 4.0 elements, form controls, frames, tables, and form submission bug reports marked with the html4 keyword "meta bug" for tracking outstanding issues with html 4.01 compliance css: style system component (see also bug reports marked with the css1, css2, and css3 keywords) dom: see dom0, dom1, dom2 and event handling components xml rdf core javascript language interpreter (javascript engine) ...
Block - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Block
it may refer to: block (css) a block on a webpage is an html element that appears on a new line, i.e.
... underneath the preceding element in a horizontal writing mode, and above the following element (commonly known as a block-level element).
... for example, <p> is by default a block-level element, whereas <a> is an inline element — you can put several links next to one another in your html source and they will sit on the same line as one another in the rendered output.
Selector (CSS) - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › CSS Selector
a css selector is the part of a css rule that describes what elements in a document the rule will match.
... the matching elements will have the rule's specified style applied to them.
... consider this css: p { color: green; } div.warning { width: 100%; border: 2px solid yellow; color: white; background-color: darkred; padding: 0.8em 0.8em 0.6em; } #customized { font: 16px lucida grande, arial, helvetica, sans-serif; } the selectors here are "p" (which applies the color green to the text inside any <p> element), "div.warning" (which makes any <div> element with the class "warning" look like a warning box), and "#customized", which sets the base font of the element with the id "customized" to 16-pixel tall lucida grande or one of a few fallback fonts.
Flex Container - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Flex Container
this element then becomes a flex container, and each one of its children becomes a flex item.
... a value of flex causes the element to become a block level flex container, and inline-flex an inline level flex container.
... these values create a flex formatting context for the element, which is similar to a block formatting context in that floats will not intrude into the container, and the margins on the container will not collapse with those of the items.
HTML - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › HTML
concept and syntax an html document is a plaintext document structured with elements.
... elements are surrounded by matching opening and closing tags.
... you can extend html tags with attributes, which provide additional information affecting how the browser interprets the element: an html file is normally saved with an .htm or .html extension, served by a web server, and can be rendered by any web browser.
jQuery - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › jQuery
jquery uses a format, $(selector).action() to assign an element(s) to an event.
... to explain it in detail, $(selector) will call jquery to select selector element(s), and assign it to an event api called .action().
... $(document).ready(function(){ alert("hello world!"); $("#blackbox").hide(); }); the above code carries out the same function as the following code: window.onload = function() { alert("hello world!"); document.getelementbyid("blackbox").style.display = "none"; }; or: window.addeventlistener("load", () => { alert("hello world!"); document.getelementbyid("blackbox").style.display = "none"; }); learn more general knowledge jquery on wikipedia jquery official website technical information offical api reference documentation ...
Speculative parsing - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › speculative parsing
if you use a <base> element to override the base uri of your page, put the element in the non-scripted part of the document.
... don't add it via document.write() or document.createelement.
...<script>document.write("<div></div>");</script> inside the head element will be interpreted as <script>document.write("</head><body><div></div>");</script> which is unbalanced.
MDN Web Docs Glossary: Definitions of Web-related terms
Glossary
t dom (document object model) domain domain name domain sharding dominator dos attack dtls (datagram transport layer security) dtmf (dual-tone multi-frequency signaling) dynamic programming language dynamic typing e ecma ecmascript effective connection type element empty element encapsulation encryption endianness engine entity entity header event exception expando f fallback alignment falsy favicon fetch directive fetch metadata request header firefox os firewall first contentful p...
...light request prerender presto primitive privileged privileged code progressive enhancement progressive web apps promise property property (css) property (javascript) protocol prototype prototype-based programming proxy server pseudo-class pseudo-element pseudocode public-key cryptography python q quality values quaternion quic r rail random number generator raster image rdf real user monitoring (rum) recursion reference reflow regular expression rendering engine r...
... round trip time (rtt) routers rss rtcp (rtp control protocol) rtf rtl (right to left) rtp (real-time transport protocol) and srtp (secure rtp) rtsp: real-time streaming protocol ruby s safe same-origin policy scm scope screen reader script-supporting element scroll container scrollport sctp sdp search engine second-level domain secure sockets layer (ssl) selector (css) self-executing anonymous function semantics seo serialization server server timing session hijacking sgml shadow tree shim ...
What is accessibility? - Learn web development
Learn › Accessibility › What is accessibility
on of accessibility for people with cognitive impairments includes: delivering content in more than one way, such as by text-to-speech or by video; easily-understood content, such as text written using plain-language standards; focusing attention on important content; minimizing distractions, such as unnecessary content or advertisements; consistent webpage layout and navigation; familiar elements, such as underlined links blue when not visited and purple when visited; dividing processes into logical, essential steps with progress indicators; website authentication as easy as possible without compromising security; and making forms easy to complete, such as with clear error messages and simple error recovery.
...test early and often, ideally running automated tests to pick up on programmatically detectable missing features (such as missing image alternative text or bad link text — see element relationships and context) and doing some testing with disabled user groups to see how well more complex site features work for them.
... different operating systems have different accessibility apis available : windows: msaa/iaccessible, uiaexpress, iaccessible2 mac os x: nsaccessibility linux: at-spi android: accessibility framework ios: uiaccessibility where the native semantic information provided by the html elements in your web apps falls down, you can supplement it with features from the wai-aria specification, which add semantic information to the accessibility tree to improve accessibility.
Handling different text directions - Learn web development
Learn › CSS › Building blocks › Handling different text directions
so the writing-mode property is in reality setting the direction in which block-level elements are displayed on the page — either from top-to-bottom, right-to-left, or left-to-right.
... writing modes and block and inline layout we have already discussed block and inline layout, and the fact that some things display as block elements and others as inline elements.
... previous overview: building blocks next in this module cascade and inheritance css selectors type, class, and id selectors attribute selectors pseudo-classes and pseudo-elements combinators the box model backgrounds and borders handling different text directions overflowing content values and units sizing items in css images, media, and form elements styling tables debugging css organizing your css ...
Test your skills: Grid Layout - Learn web development
Learn › CSS › CSS layout › Grid skills
you will be working through three small tasks which use different elements of the material you have just covered.
... grid layout one in this task you should create a grid into which the four child elements will auto-place.
...by editing the css rules for the two child elements, cause them to span over several grid tracks each; the second item should overlay the first as in the image below.
Multimedia and Embedding - Learn web development
Learn › HTML › Multimedia and embedding
images in html there are other types of multimedia to consider, but it is logical to start with the humble <img> element used to embed a simple image in a webpage.
... video and audio content next, we'll look at how to use the html5 <video> and <audio> elements to embed video and audio on our pages, including basics, providing access to different file formats to different browsers, adding captions and subtitles, and how to add fallbacks for older browsers.
... from <object> to <iframe> — other embedding technologies at this point we'd like to take somewhat of a sideways step, looking at a couple of elements that allow you to embed a wide variety of content types into your webpages: the <iframe>, <embed> and <object> elements.
Function return values - Learn web development
Learn › JavaScript › Building blocks › Return values
there's also a <script> element, in which we have stored a reference to both html elements in two variables.
... let's add some useful functions to this <script> element.
...therefore, a sentence is printed out inside the paragraph element that states the square, cube, and factorial values of the number.
What went wrong? Troubleshooting JavaScript - Learn web development
Learn › JavaScript › First steps › What went wrong
the earliest instance you'll find in the javascript is on line 48: const loworhi = document.queryselector('loworhi'); at this point we are trying to make the variable contain a reference to an element in the document's html.
...line 48 is using a document.queryselector() method to get a reference to an element by selecting it with a css selector.
... try saving and refreshing again, and your console.log() statement should return the <p> element we want.
Aprender y obtener ayuda - Learn web development
Learn › Learning and getting help
if you want to find out more about a specific technology feature, such as the html <video> element, or the css background-color or opacity properties, or the javascript date.settime() method, you should just search for the feature's name.
... if you are looking for some more specific information, you can add other keywords as modifiers, for example "<video> element autoplay attribute", or "date.settime parameters".
... run code after several promises are fulfilled play a video stream from a webcam in the browser create a linear gradient in the background of your element error messages if you are having a problem with some code and a specific error message is coming up, it is often a good idea to just copy the error message into your search engine and use it as the search term.
HTML performance features - Learn web development
Learn › Performance › HTML
objective: to learn about the impact of html elements and attributes on web performance optimization.
... elements & attributes impacting performance the <picture> element the <video> element the <source> element the <img> srcset attribute responsive images preloading content with rel="preload" - (https://w3c.github.io/preload/ ) async / defer attributes <iframe> <object> <script> rel attribute conclusion previous overview: performance next in this module the "why" of web performance what is web performance?
... html performance features css performance features fonts and performance mobile performance focusing on performance see also the <picture> element the <video> element the <source> element the <img> srcset attribute responsive images preloading content with rel="preload" - (https://w3c.github.io/preload/ ) ...
Web performance resources - Learn web development
Learn › Performance › Web Performance Basics
if you do, have a backup plan for seo (e.g render full page for bot traffic); for example, by using the loading attribute on the <img> element it is also crucial to realize what is really important to your users.
... <style type="text/css"> // insert your css here </style> javascript avoid javascript blocking by using the async or defer attributes, or link javascript assets after the page's dom elements.
... javascript only block rendering for elements that appear after the script tag in the dom tree.
Using Vue computed properties - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Vue computed properties
computed: { listsummary() { const numberfinisheditems = this.todoitems.filter(item =>item.done).length return `${numberfinisheditems} out of ${this.todoitems.length} items completed` } } now we can add {{listsummary}} directly to our template; we'll add this inside an <h2> element, just above our <ul>.
... we'll also add an id and an aria-labelledby attribute to assign the <h2> contents to be a label for the <ul> element.
... update the <input> element in todoitem.vue to look like this.
Debugging Frame Reflow
Mozilla › Debugging › Debugging Frame Reflow
element width maximum width frame status overflow area getting the log make sure that your build is a debug build (in short you need ac_add_options --enable-debug in your .mozconfig file).
...element size is 300 twips.
...element size only once and it reports now: block 02d7bcf8 d=1410,300 the block shows the same address as the previous one.
Inner and outer windows
Mozilla › Developer guide › Inner and outer windows
consider a document that has three <iframe> elements in it.
... the hierarchy would look something like this: in this diagram, objects you interact with directly in the dom (that is, window, document, and element objects) are blue.
...the <iframe> element offers the contentwindow property, which gives you the outer window window object containing the frame's document.
Error codes returned by Mozilla APIs
Mozilla › Errors
document and node errors the following errors can occur when using documents, nodes and elements.
...for example, an attempt was made to use the element.insertbefore method to insert a node before one that is not a child.
...57001c) ns_error_xpc_js_threw_null (0x8057001d) ns_error_xpc_js_threw_string (0x8057001e) ns_error_xpc_js_threw_number (0x8057001f) ns_error_xpc_javascript_error (0x80570020) ns_error_xpc_javascript_error_with_details (0x80570021) ns_error_xpc_cant_convert_primitive_to_array (0x80570022) ns_error_xpc_cant_convert_object_to_array (0x80570023) ns_error_xpc_not_enough_elements_in_array (0x80570024) ns_error_xpc_cant_get_array_info (0x80570025) ns_error_xpc_not_enough_chars_in_string (0x80570026) ns_error_xpc_security_manager_veto (0x80570027) ns_error_xpc_interface_not_scriptable (0x80570028) ns_error_xpc_interface_not_from_nsisupports (0x80570029) ns_error_xpc_cant_get_jsobject_of_dom_object (0x8057002a) ns_error_xpc_cant_set_read_only_con...
Firefox UI considerations for web developers
Mozilla › Firefox › UI considerations
firefox's top sites box in this article, we take a look at how to influence the appearance of your site in firefox user interface elements such as the top sites box.
... if tippy top doesn't include the site, firefox looks in its places data store for icons specified in the page's <head> element; if an svg icon is available, that icon is selected.
... providing a top sites ready icon the simple rule is to provide an icon which is at least 96x96 pixels in size, using a <link> element whose rel attribute is a reference to a file containing an icon of a supported type.
mozbrowseropenwindow
Mozilla › Gecko › Chrome › API › Browser API › mozbrowseropenwindow
the embedder must use the <iframe> passed in the event.details.frameelement property as the new window content.
... details the details property returns an anonymous javascript object with the following properties: url a domstring representing the url of the document loaded within the frameelement property.
... frameelement an object representing the new browser <iframe> that will embed the new content.
Chrome-only CSS reference
Mozilla › Gecko › Chrome › CSS
it only works in chrome code, and only on mac os x.:-moz-lwthemethe :-moz-lwtheme pseudo-class matches in chrome documents when the root element's lightweightthemes attribute is true and a theme is selected.:-moz-lwtheme-brighttextthe :-moz-lwtheme-brighttext pseudo-class matches in chrome documents when :-moz-lwtheme is true and a lightweight theme with a bright text color is selected.:-moz-lwtheme-darktextthe :-moz-lwtheme-darktext pseudo-class matches in chrome documents when :-moz-lwtheme is true and a lightweight theme with a dark te...
...xt color is selected.::-moz-tree-cellactivated by the properties attribute.::-moz-tree-cell-textactivated by the properties attribute.::-moz-tree-cell-text(hover)the :-moz-tree-cell-text(hover) css pseudo-class will match an element if the mouse cursor is presently hovering over text in a tree cell.::-moz-tree-columnactivated by the properties attribute.::-moz-tree-drop-feedbackactivated by the properties attribute.::-moz-tree-imageactivated by the properties attribute.::-moz-tree-indentationactivated by the properties attribute.::-moz-tree-lineactivated by the properties attribute.::-moz-tree-progressmeteractivated when the type attribute is set to progressmeter.
... ::-moz-tree-rowthe ::-moz-tree-row css pseudo-element is used to select rows and apply styles to tree rows.::-moz-tree-row(hover)the ::-moz-tree-row(hover) css pseudo-class will match an element if the mouse cursor is presently hovering over a tree row.::-moz-tree-separatoractivated by the properties attribute.::-moz-tree-twistyactivated by the properties attribute.css -moz-bool-pref() @supports functionthe -moz-bool-pref() @supports condition is available to gecko chrome and ua stylesheets to check if a boolean preference is enabled.css <display-xul> component</display-xul>firefox supports the following -moz- prefixed xul display values:overflow-clip-boxthe overflow-clip-box css property specifies relative to which box the clipping happens when there is an overflow.
Embedding the editor
Mozilla › Gecko › Embedding Mozilla › Embedding the editor
(the current nseditorshell makes assumptions about the hosting xul document, which need to be broken.) composer embedded in a web page (<htmlarea>) ie 5 supports the <htmlarea> element; if mozilla is to support something similar, editor needs to be embeddable to the extent that this can be done.
...at window construction time, we get the editorshell from the <editor> element, and put that into window.editorshell.
... fix existing js and c++ code which explicitly addresses elements in the xul document to go through nsieditoruserinterface.
MathML Accessibility in Mozilla
Mozilla › MathML Project › a11y
, b ⏞ ℓ b 's ⏟ k + ℓ elements } __________ the set modified modified a comma ...
... comma b with modified over brace with script l b apostraphes above above with modified under brace with k plus script l elements below below end set __________ { a , ...
...underscript k plus l elements.
DMD
Mozilla › Performance › DMD
place/dmd/../../../../memory/replace/dmd/dmd.cpp:1286) #02: malloc (/home/njn/moz/mi5/go64dmd/memory/build/../../../memory/build/replace_malloc.c:153) #03: moz_xmalloc (/home/njn/moz/mi5/memory/mozalloc/mozalloc.cpp:84) #04: nscyclecollectingautorefcnt::incr(void*, nscyclecollectionparticipant*) (/home/njn/moz/mi5/go64dmd/dom/xul/../../dist/include/nsisupportsimpl.h:250) #05: nsxulelement::create(nsxulprototypeelement*, nsidocument*, bool, bool,mozilla::dom::element**) (/home/njn/moz/mi5/dom/xul/nsxulelement.cpp:287) #06: nsxblcontentsink::createelement(char16_t const**, unsigned int, mozilla::dom::nodeinfo*, unsigned int, nsicontent**, bool*, mozilla::dom::fromparser) (/home/njn/moz/mi5/dom/xbl/nsxblcontentsink.cpp:874) #07: nscomptr<nsicontent>::startassignment() (/home/...
...njn/moz/mi5/go64dmd/dom/xml/../../dist/include/nscomptr.h:753) #08: nsxmlcontentsink::handlestartelement(char16_t const*, char16_t const**, unsigned int, unsigned int, bool) (/home/njn/moz/mi5/dom/xml/nsxmlcontentsink.cpp:1007) } } it tells you that there were 150 heap blocks that were allocated from the program point indicated by the "allocated at" stack trace, that these blocks took up 21,600 bytes, that all 150 blocks had a size of 144 bytes, and that 1,200 of those bytes were "slop" (wasted space caused by the heap allocator rounding up request sizes).
...mdfuncs::report(void const*) (/home/njn/moz/mi5/go64dmd/memory/replace/dmd/../../../../memory/replace/dmd/dmd.cpp:1646) #02: windowsmallocsizeof(void const*) (/home/njn/moz/mi5/dom/base/nswindowmemoryreporter.cpp:189) #03: nsattrandchildarray::sizeofexcludingthis(unsigned long (*)(void const*)) const (/home/njn/moz/mi5/dom/base/nsattrandchildarray.cpp:880) #04: mozilla::dom::fragmentorelement::sizeofexcludingthis(unsigned long (*)(void const*)) const (/home/njn/moz/mi5/dom/base/fragmentorelement.cpp:2337) #05: nsinode::sizeofincludingthis(unsigned long (*)(void const*)) const (/home/njn/moz/mi5/go64dmd/parser/html/../../../dom/base/nsinode.h:307) #06: mozilla::dom::nodeinfo::nodetype() const (/home/njn/moz/mi5/go64dmd/dom/base/../../dist/include/mozilla/dom/nodeinfo.h:127) ...
Investigating CSS Performance
Mozilla › Performance › Investigating CSS Performance
two counts are collected which allow for an estimation of the amount of work being done during restyle: resolvestyleforcount this is incremented everytime that we do style resolution on an element contentenumfunccount this is incremented roughly for every rule that we test against time during restyle can be spent in a bunch of places.
... for example, hasstatedependentstyle will compute a hint that determines how many elements we'll restyle.
... if we get a erestyle_subtree we will restyle more elements.
Scroll-linked effects
Mozilla › Performance › Scroll-linked effects
scrolling effects explained often scrolling effects are implemented by listening for the scroll event and then updating elements on the page in some way (usually the css position or transform property.) you can find a sampling of such effects at css scroll api: use cases.
... <body style="height: 5000px" onscroll="document.getelementbyid('toolbar').style.top = math.max(100, window.scrolly) + 'px'"> <div id="toolbar" style="position: absolute; top: 100px; width: 100px; height: 20px; background-color: green"></div> </body> this implementation of sticky positioning relies on the scroll event listener to reposition the "toolbar" div.
... } else if (math.abs(destination - window.scrolly) < 200) { scrollto(window.scrollx, window.scrolly + ((destination - window.scrolly) / 2)); settimeout(snap, 20, destination); } } var timeoutid = null; addeventlistener("scroll", function() { if (timeoutid) cleartimeout(timeoutid); timeoutid = settimeout(snap, 200, parseint(document.getelementbyid('snaptarget').style.top)); }, true); </script> <div id="snaptarget" class="snaptarget" style="position: relative; top: 200px; width: 100%; height: 200px; background-color: green"></div> </body> in this example, there is a scroll event listener which detects if the scroll position is within 200 pixels of the top of the "snaptarget" div.
accessibility.tabfocus
Mozilla › Preferences › Preference reference › accessibility.tabfocus
the preference accessibility.tabfocus controls what elements receive focus when the user presses the tab key.
... type:integer default value: 7 (windows and linux); 2 (mac os x) exists by default: no application support:gecko 1.7 status: active introduction: bugs: bug 140612 values 1 give focus only to text fields (default on mac osx) 2 give focus to all form elements except text fields.
...the value 7 (give focus to all elements) is the default on windows and linux.
Midas
Mozilla › Projects › Midas
internet explorer also supports the ability to edit specific elements using the contenteditable attribute; starting with firefox 3, gecko also supports contenteditable.
...according to standards, the iframe element has the contentdocument property that refers to the document in the inline frame.
... formatblock h1, h2, h3, h4, h5, h6, p, div, address, blockquote (more?) the selection surrounded by the given block element.
PR_APPEND_LINK
Mozilla › Projects › NSPR › Reference › PR APPEND LINK
appends an element to the end of a list.
... syntax #include <prclist.h> pr_append_link ( prclist *elemp, prclist *listp); parameters elemp a pointer to the element to be inserted.
... description pr_append_link adds the specified element to the end of the specified list.
PR_INSERT_LINK
Mozilla › Projects › NSPR › Reference › PR INSERT LINK
inserts an element at the head of the list.
... syntax #include <prclist.h> pr_insert_link ( prclist *elemp, prclist *listp); parameters elemp a pointer to the element to be inserted.
... description pr_insert_link inserts the specified element at the head of the specified list.
PR_REMOVE_AND_INIT_LINK
Mozilla › Projects › NSPR › Reference › PR REMOVE AND INIT LINK
removes an element from a circular list and initializes the linkage.
... syntax #include <prclist.h> pr_remove_and_init_link (prclist *elemp); parameter elemp a pointer to the element.
... description pr_remove_and_init_link removes the specified element from its circular list and initializes the links of the element to point to itself.
PR_REMOVE_LINK
Mozilla › Projects › NSPR › Reference › PR REMOVE LINK
removes an element from a circular list.
... syntax #include <prclist.h> pr_remove_link (prclist *elemp); parameter elemp a pointer to the element.
... description pr_remove_link removes the specified element from its circular list.
An overview of NSS Internals
Mozilla › Projects › NSS › An overview of NSS Internals
multiple elements of nss's own modules have been implemented with this interface, and nss makes use of this interface when talking to those modules.
... a core element of nss is freebl, a base library providing hash functions, big number calculations, and cryptographic algorithms.
...such an operation might fail at runtime if data elements are still being referenced.
Index
Mozilla › Projects › NSS › Index
multiple elements of nss's own modules have been implemented with this interface, and nss makes use of this interface when talking to those modules.
... a core element of nss is freebl, a base library providing hash functions, big number calculations, and cryptographic algorithms.
...such an operation might fail at runtime if data elements are still being referenced.
JIT Optimization Outcomes
Mozilla › Projects › SpiderMonkey › JIT Optimization Outcomes
arrayseennegativeindex arrays at this element access location have seen negative indexes.
... typedobjectarrayrange failed to do range check of element access on a typed object.
...enericproxy icgetpropstub_argumentslength icsetpropstub_slot icsetpropstub_genericproxy icsetpropstub_domproxyshadowed icsetpropstub_domproxyunshadowed icsetpropstub_callsetter icsetpropstub_addslot icsetpropstub_setunboxed icgetelemstub_readslot icgetelemstub_callgetter icgetelemstub_readunboxed icgetelemstub_dense icgetelemstub_densehole icgetelemstub_typedarray icgetelemstub_argselement icgetelemstub_argselementstrict icsetelemstub_dense icsetelemstub_typedarray icnamestub_readslot icnamestub_callgetter call inlining outcomes optimization outcomes of attempts to inline function calls.
JSFunctionSpec
Mozilla › Projects › SpiderMonkey › JSAPI reference › JSFunctionSpec
jsfunctionspec can also be used to define an array element rather than a named property.
... array elements are actually individual properties.
... to define an array element, cast the element's index value to const char*, initialize the name field with it, and specify the jsprop_index attribute in flags.
JS_AlreadyHasOwnProperty
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS AlreadyHasOwnProperty
ect obj, const char *name, bool *foundp); boo js_alreadyhasownucproperty(jscontext *cx, js::handleobject obj, const char16_t *name, size_t namelen, bool *foundp); boo js_alreadyhasownpropertybyid(jscontext *cx, js::handleobject obj, js::handleid id, bool *foundp); // added in spidermonkey 1.8.1 boo js_alreadyhasownelement(jscontext *cx, js::handleobject obj, uint32_t index, bool *foundp); name type description cx jscontext * pointer to a js context.
... index uint32_t (in js_alreadyhasownelement only) the index of the element to search for.
...see also mxr id search for js_alreadyhasownproperty mxr id search for js_alreadyhasownucproperty mxr id search for js_alreadyhasownpropertybyid mxr id search for js_alreadyhasownelement bug 400793 bug 461163 ...
JS_PushArguments
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS PushArguments
format is a sequential character array, where each element of the array indicates the js type into which to convert the next c/c++ argument.
...if successful, js_pusharguments would return a pointer to the first element of an array of four jsvals: a boolean, a number, an object (or null), and a boolean.
... on success, js_pusharguments fills in the supplied markp pointer and returns a pointer to the first element of an array of jsval which are automatically rooted as necessary (protected from the gc temporarily).
JSAPI reference
Mozilla › Projects › SpiderMonkey › JSAPI reference
dded in spidermonkey 17 jsfun_constructor added in spidermonkey 17 jsprop_redefine_nonconfigurable added in spidermonkey 38 jsprop_resolving added in spidermonkey 45 jsprop_ignore_enumerate added in spidermonkey 38 jsprop_ignore_readonly added in spidermonkey 38 jsprop_ignore_permanent added in spidermonkey 38 jsprop_ignore_value added in spidermonkey 38 js_alreadyhasownelement added in spidermonkey 1.8 js_alreadyhasownproperty added in spidermonkey 1.8 js_alreadyhasownucproperty added in spidermonkey 1.8 js_alreadyhasownpropertybyid added in spidermonkey 1.8.1 js_defineproperty js_defineucproperty js_definepropertybyid added in spidermonkey 1.8.1 js_defineproperties js_enumerate js_forwardgetpropertyto added in spidermonkey 17 js_forwardgetelementto added in ...
...e since jsapi 26 js_getucpropertyattributes obsolete since jsapi 26 js_getpropertyattrsgetterandsetter obsolete since jsapi 26 js_getucpropertyattrsgetterandsetter obsolete since jsapi 26 js_getpropertyattrsgetterandsetterbyid obsolete since jsapi 26 js_lookupproperty obsolete since jsapi 37 js_lookupucproperty obsolete since jsapi 37 js_lookuppropertybyid obsolete since jsapi 37 js_lookupelement obsolete since jsapi 37 js_lookuppropertywithflags obsolete since jsapi 31 js_lookuppropertywithflagsbyid obsolete since jsapi 31 js_newpropertyiterator obsolete since jsapi 36 js_nextproperty obsolete since jsapi 36 js_setpropertyattributes obsolete since jsapi 26 js_setucpropertyattributes obsolete since jsapi 26 the following functions behave like js_getproperty and js_getpropertybyid ...
... jsgetmethodop obsolete since javascript 1.8.5 jssetmethodop obsolete since javascript 1.8.5 jsenumeratevaluesop obsolete since javascript 1.8.5 jsconcatenateop obsolete since javascript 1.8.5 arrays js_newarrayobject js_isarrayobject js_getarraylength js_setarraylength js_defineelement js_deleteelement js_getelement js_haselement js_setelement js_hasarraylength obsolete since jsapi 8 js_aliaselement obsolete since jsapi 8 js_lookupelement obsolete since jsapi 37 js_deleteelement2 obsolete since jsapi 39 functions calling a function or a method of an object: class js::callargs added in spidermonkey 17 js::callargsfromvp added in spidermonkey 17 js::call added ...
Secure Development Guidelines
Mozilla › Security › Secure Development Guidelines
most memory allocators use a linked list or binary tree bbv: off-by-one the array index starts at 0 not at 1 char array[1024]; array[0] = first element!
... array[1023] = last element!
... array[1024] = 1 element outside the array!
Components.utils.cloneInto
Mozilla › Tech › XPCOM › Language Bindings › Components.utils.cloneInto
see cloning objects that contain dom elements below.
...ame mechanism as that used in components.utils.exportfunction: // add-on script var addonscriptobject = { greetme: function() { alert("hello from add-on"); } }; contentwindow.addonscriptobject = cloneinto(addonscriptobject, contentwindow, {clonefunctions: true}); // page script var test = document.getelementbyid("test"); test.addeventlistener("click", function() { window.addonscriptobject.greetme(); }, false); cloning objects that contain dom elements by default, if the object you clone contains objects that are reflected from c++, such as dom elements, the cloning operation will fail with an error.
...apreflectors:true} flag, then the object you clone is allowed to contain these objects: // add-on script var addonscriptobject = { body: contentwindow.document.body }; contentwindow.addonscriptobject = cloneinto(addonscriptobject, contentwindow, {wrapreflectors: true}); // page script var test = document.getelementbyid("test"); test.addeventlistener("click", function() { console.log(window.addonscriptobject.body.innerhtml); }, false); access to these objects in the target scope is subject to the normal security checks.
Components.utils.exportFunction
Mozilla › Tech › XPCOM › Language Bindings › Components.utils.exportFunction
s to the argument that are made in the exported function will affect the original object that was passed in: // privileged scope: for example, a content script function changemyname(user) { user.name = "bill"; } exportfunction(changemyname, contentwindow, { defineas: "changemyname" }); // less-privileged scope: for example, a page script var user = {name: "jim"}; var test = document.getelementbyid("test"); test.addeventlistener("click", function() { console.log(user.name); // "jim" window.changemyname(user); console.log(user.name); // "bill" }, false); note that this is subject to the normal rules of xrays: for example, an expando property added to a dom node will not be visible in the original object.
...rays: // privileged scope: for example, a content script function loguser(user) { // console.log(user.getuser()); // error console.log(user.wrappedjsobject.getuser()); // "bill" } exportfunction(loguser, contentwindow, { defineas: "loguser" }); // less-privileged scope: for example, a page script var user = {getuser: function() {return "bill";}} var test = document.getelementbyid("test"); test.addeventlistener("click", function() { window.loguser(user); }, false); passing functions as arguments if functions are given as arguments, these are also passed as xrays.
...callbacks into the exported function just works, making the allowcallbacks option redundant: // privileged scope: for example, a content script function loguser(getuser) { console.log(getuser()); // "bill" } exportfunction(loguser, unsafewindow, { defineas: "loguser" }); // less-privileged scope: for example, a page script function getuser() { return "bill"; } var test = document.getelementbyid("test"); test.addeventlistener("click", function() { window.loguser(getuser); }, false); cross-origin checking when the exported function is called each argument, including this, is checked to make sure that the caller subsumes that argument.
nsIAccessNode
Mozilla › Tech › XPCOM › Reference › Interface › nsIAccessNode
nsidomcssprimitivevalue getcomputedstylecssvalue( in domstring pseudoelt, in domstring propertyname ); parameters pseudoelt the pseudo element to retrieve style for, or empty string for general computed style information for the node.
... getcomputedstylevalue() retrieve the computed style value for this dom node, if it is a dom element.
... domstring getcomputedstylevalue( in domstring pseudoelt, in domstring propertyname ); parameters pseudoelt the pseudo element to retrieve style for, or null for general computed style information for this node.
nsIAccessible
Mozilla › Tech › XPCOM › Reference › Interface › nsIAccessible
the accessible tree is a subset of nodes in the dom tree -- such as documents, focusable elements and text.
... children array of all this element's children.
... role enumerated accessible role for the associated element.
nsICacheMetaDataVisitor
Mozilla › Tech › XPCOM › Reference › Interface › nsICacheMetaDataVisitor
netwerk/cache/nsicacheentrydescriptor.idlscriptable this interface is used for visiting the meta data elements for a specified cache entry.
... inherits from: nsisupports last changed in gecko 1.7 method overview boolean visitmetadataelement(in string key, in string value); methods visitmetadataelement() this method is called for each key/value pair in the meta data for a cache entry.
... boolean visitmetadataelement( in string key, in string value ); parameters key the key for visiting the meta data for a cache entry.
nsICategoryManager
Mozilla › Tech › XPCOM › Reference › Interface › nsICategoryManager
ractid(ns_categorymanager_contractid, ns_get_iid(nsicategorymanager), getter_addrefs(catmgr)); if (ns_failed(rv)) return rv; nscomptr<nsisimpleenumerator> cats; rv = catmgr->enumeratecategories(getter_addrefs(cats)); if (ns_failed(rv)) return rv; prbool hasmore; while (ns_succeeded(cats->hasmoreelements(&hasmore) && hasmore) { nscomptr<nsisupports> elem; cats->getnext(getter_addrefs(elem)); nscomptr<nsisupportscstring> category = do_queryinterface(elem, &rv); if (ns_failed(rv)) break; nsembedcstring categoryname; rv = category->getdata(categoryname); if (ns_failed(rv)) break; printf("%s\n", categoryname.get()); } return ns_ok; } this snipp...
... var categorymanager = components.classes["@mozilla.org/categorymanager;1"] .getservice(components.interfaces.nsicategorymanager); var enumerator = categorymanager.enumeratecategories(); var categories = []; while (enumerator.hasmoreelements()) { var item = enumerator.getnext(); var category = item.queryinterface(components.interfaces.nsisupportscstring) categories.push(category.tostring()); } categories.sort(); var categoriesstring = categories.join("\n"); dump(categoriesstring + "\n"); print out a list of app-startup entries this example prints out a list of entries of "app-startup" category.
... var categorymanager = components.classes["@mozilla.org/categorymanager;1"] .getservice(components.interfaces.nsicategorymanager); var enumerator = categorymanager.enumeratecategory("app-startup"); var entries = []; while (enumerator.hasmoreelements()) { var item = enumerator.getnext(); var entry = item.queryinterface(components.interfaces.nsisupportscstring) entries.push(entry.tostring()); } entries.sort(); var entriesstring = entries.join("\n"); dump(entriesstring + "\n"); disable currently loaded plugins by type this snippet here shows how to disable plugins that are currently loaded for the file type of pdf.
nsIDOMWindow
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMWindow
it represents a single window object that may contain child windows if the document in the window contains an html frameset document, or if the document contains iframe elements.
... method overview nsidomcssstyledeclaration getcomputedstyle(in nsidomelement elt, [optional] in domstring pseudoelt); nsiselection getselection(); void scrollby(in long xscrolldif, in long yscrolldif); void scrollbylines(in long numlines); void scrollbypages(in long numpages); void scrollto(in long xscroll, in long yscroll); void sizetocontent(); attributes attribute type description ap...
... nsidomcssstyledeclaration getcomputedstyle( in nsidomelement elt, in domstring pseudoelt optional ); parameters elt pseudoelt optional return value getselection() returns the nsiselection object indicating what if any content is currently selected in the window.
nsIMessageListener
Mozilla › Tech › XPCOM › Reference › Interface › nsIMessageListener
either an element owning the message manager, or the message manager itself if no element owns it.
... if the message was sent from a frame script using a nsicontentframemessagemanager, then this property is the xul <browser> element for the frame from which the message was sent.
...when there are multiple listeners to synchronous messages, each listener's return value is sent back as an element in an array.
nsIMicrosummaryObserver
Mozilla › Tech › XPCOM › Reference › Interface › nsIMicrosummaryObserver
1.0 66 introduced gecko 1.8 obsolete gecko 6.0 inherits from: nsisupports last changed in gecko 1.9 (firefox 3) warning: microsummary support was removed in gecko 6.0 (firefox 6.0 / thunderbird 6.0 / seamonkey 2.3) method overview void oncontentloaded(in nsimicrosummary microsummary); void onelementappended(in nsimicrosummary microsummary); void onerror(in nsimicrosummary microsummary); methods oncontentloaded() called when an observed microsummary updates its content.
... onelementappended() called when an element is appended to a microsummary set.
... void onelementappended( in nsimicrosummary microsummary ); parameters microsummary the microsummary that has just been appended to the set.
nsIStringBundle
Mozilla › Tech › XPCOM › Reference › Interface › nsIStringBundle
rray, size_is(length)] in wstring params, in unsigned long length); nsisimpleenumerator getsimpleenumeration(); wstring getstringfromid(in long aid); wstring getstringfromname(in wstring aname); methods formatstringfromid() returns a formatted string with the given id from the string bundle, where each occurrence of %s (uppercase) is replaced by each successive element in the supplied array.
... formatstringfromname() returns a formatted string with the given key name from the string bundle, where each occurrence of %s (uppercase) is replaced by each successive element in the supplied array.
... return value returns a nsisimpleenumerator of all nsipropertyelement entries in the string bundle.
nsITreeColumns
Mozilla › Tech › XPCOM › Reference › Interface › nsITreeColumns
last changed in gecko 1.9 (firefox 3) inherits from: nsisupports method overview nsitreecolumn getcolumnat(in long index); nsitreecolumn getcolumnfor(in nsidomelement element); nsitreecolumn getfirstcolumn(); nsitreecolumn getkeycolumn(); nsitreecolumn getlastcolumn(); nsitreecolumn getnamedcolumn(in astring id); nsitreecolumn getprimarycolumn(); nsitreecolumn getsortedcolumn(); void invalidatecolumns(); void restorenaturalorder(); attributes attribute type description count long the number of columns.
...getcolumnfor() get the column for a given element.
... nsitreecolumn getcolumnfor( in nsidomelement element ); parameters element a dom element return value a nsitreecolumn for this element.
nsIXULBrowserWindow
Mozilla › Tech › XPCOM › Reference › Interface › nsIXULBrowserWindow
method overview astring onbeforelinktraversal(in astring originaltarget, in nsiuri linkuri, in nsidomnode linknode, in prbool isapptab); void setjsdefaultstatus(in astring status); void setjsstatus(in astring status); void setoverlink(in astring link, in nsidomelement element); methods onbeforelinktraversal() called before traversing a link to determine the appropriate target into which to load the link.
...void setoverlink( in astring link, in nsidomelement element ); parameters link the link string.
... element the currently targeted link element.
nsIXULTemplateResult
Mozilla › Tech › XPCOM › Reference › Interface › nsIXULTemplateResult
the dom element created for this result, if any, will have its id attribute set to this value.
...both the query as compiled by the query processor's nsixultemplatequeryprocessor.compilequery() method and the xul <rule> element are supplied.
...the <rule> element must always be a child of the <query> element that was used to compile the query.
Building a Thunderbird extension 5: XUL
Mozilla › Thunderbird › Thunderbird extensions › Building a Thunderbird extension 5: XUL
we add widgets by inserting new xul dom elements into the application window and modify them using scripts and attaching event handlers.
... while xul provides the elements of the user interface, actions are written in javascript.
...when parsing our overlay file, the xul engine will take all child elements of the <statusbar> tag and merge them with the original xul document's <statusbar> tag.
Building a Thunderbird extension 6: Adding JavaScript
Mozilla › Thunderbird › Thunderbird extensions › Building a Thunderbird extension 6: Adding Javascript
depending on the installed theme the result will look something like this: modify xul elements with javascript save the following javascript code into the content/ folder next to your myhelloworld.xul file and name it overlay.js.
... window.addeventlistener("load", function(e) { startup(); }, false); window.setinterval( function() { startup(); }, 60000); //update date every minute function startup() { var mypanel = document.getelementbyid("my-panel"); var date = new date(); var day = date.getday(); var datestring = date.getfullyear() + "." + (date.getmonth()+1) + "." + date.getdate(); mypanel.label = "date: " + datestring; } the first part registers a new event listener that will be executed automatically when thunderbird loads.
... the event listener then calls our startup function which gets our <statusbarpanel>-element with the id my-panel from the document's dom tree.
Type conversion
Mozilla › js-ctypes › Using js-ctypes › Type conversion
implicit convert in js-ctypes, data could be converted implicitly when passing to or returning from a functiontype call, or setting pointer content, an array element or a struct field.
...ct.v = ctypes.int32_t(10); // throws error float types target type source converted value any float types js number (only if fits to the size) src pointer types target type source converted value any pointer types null nullptr ctypes.voidptr_t any pointer types src any array types src.addressofelement(0) ctypes.pointertype(t) ctypes.arraytype(t) src.addressofelement(0) ctypes.arraytype(t, n) src.addressofelement(0) var mystruct = ctypes.structtype("mystructtype", [ { "v": ctypes.int16_t.ptr } ])(); mystruct.v = ctypes.int16_t.array(10)(); console.log(mystruct.v.tostring()); // 'ctypes.int16_t.ptr(ctypes.uint64("0x11d6ff400"))' mystruct.v = null; consol...
... ctypes.char.array(n) js string (only if utf8 representation fits to the array) null-terminated utf8 string ctypes.signed_char.array(n) ctypes.unsigned_char.array(n) ctypes.char16_t.array(n) js string (only if fits to the array) null-terminated utf16 string any array types js array (only if array length is same) convert each element implicitly any array types any arraybuffer object (only if array length is same in bytes) copy data ctypes.int8_t.array(n) int8array (only if array length is same in bytes) ctypes.uint8_t.array(n) uint8array (only if array length is same in bytes) uintclamped8array (only if array length is same in bytes) ctypes.int16_t.array...
Drawing and Event Handling - Plugins
Plugins › Guide › Drawing and Event Handling
tscape page */ uint32 width; /* maximum window size */ uint32 height; nprect cliprect; /* clipping rectangle in port coordinates */ #ifdef xp_unix void * ws_info; /* platform-dependent additional data */ #endif /* xp_unix */ npwindowtype type; /* whether this is a window or a drawable */ } npwindow; the window parameter is a platform-specific handle to a native window element in the browser window hierarchy on windows and unix.
...this happens when plug-ins are invoked with an html object element that has been hidden with css rules (see plug-in display modes in the introduction) or with an embed element whose hidden attribute has been set.
...here are two examples of plug-ins that have transparent areas: a plug-in that is smaller than the area specified by the enclosing object or embed element a plug-in with nonrectangular boundaries the browser is responsible for rendering the background of a transparent windowless plug-in.
Browser Console - Firefox Developer Tools
Tools › Browser Console
you can confirm this by evaluating window: this means you can control the browser: opening, closing tabs and windows and changing the content that they host, and modify the browser's ui by creating, changing and removing xul elements.
...on windows, the following code will add a new item to the browser's main menu: var parent = window.document.getelementbyid("appmenuprimarypane"); var makethetea = gbrowser.ownerdocument.defaultview.document.createelementns("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul", "menuitem"); makethetea.setattribute("label", "a nice cup of tea?"); parent.appendchild(makethetea); on macos, this similar code will add a new item to the "tools" menu: var parent = window.document.getelementbyid("menu_toolspop...
...up"); var makethetea = gbrowser.ownerdocument.defaultview.document.createelementns("http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul", "menuitem"); makethetea.setattribute("label", "a nice cup of tea?"); parent.appendchild(makethetea); ...
Tutorial: Set a breakpoint - Firefox Developer Tools
Tools › Debugger-API › Tutorial-Breakpoint
this runs the div element’s onclick handler.
...if you have more than one tab visiting a file: url, they all share a single content process, so you may need to use a different element of the array as the debuggee.
...when you click on the div element, both debuggers’ breakpoints are hit, and both handlers run.
DevTools API - Firefox Developer Tools
Tools › DevToolsAPI
getnotificationbox() returns a <xul:notificationbox> element for the toolbox that can be used to display notifications to the user.
...the frame is the <iframe> element that has been created for the tool.
...it must be a valid id for an html element.
Aggregate view - Firefox Developer Tools
Tools › Memory › Aggregate view
type this is the default view, which looks something like this: it groups the things on the heap into types, including: javascript objects: such as function or array dom elements: such as htmlspanelement or window strings: listed as "strings" javascript sources: listed as "jsscript" internal objects: such as "js::shape".
...this page simply runs a script that creates a large number of dom nodes (200 htmldivelement objects and 4000 htmlspanelement objects).
... so in the example above, we can see that we made 4002 allocations, accounting for 89% of the total heap, in createtoolbarbutton(), at alloc.js line 9, position 23: that is, the exact point where we create the <span> elements.
Tree map view - Firefox Developer Tools
Tools › Memory › Tree map view
for the treemaps shown in the memory tool, things on the heap are divided at the top level into four categories: objects: javascript and dom objects, such as function, object, or array, and dom types like window and htmldivelement.
... here are some example snapshots, as they appear in the tree map view: this treemap is from the dom allocation example, which simply runs a script that creates a large number of dom nodes (200 htmldivelement objects and 4000 htmlspanelement objects).
... you can see how almost all the heap usage is from the htmlspanelement objects that it creates.
Edit Shape Paths in CSS - Firefox Developer Tools
Tools › Page Inspector › How to › Edit CSS shapes
once you have selected your element, you should see the shape icon alongside any valid value, e.g.
... to deactivate the shape path editor click on the icon again, or select another element or a different editor.
... note that the shape path editor does not persist between page reloads — if you reload your page you will need to select the element again.
Use the Inspector from the Web Console - Firefox Developer Tools
Tools › Page Inspector › How to › Use the Inspector from the Web Console
the element that's currently selected in the page inspector can be referenced in the web console using the variable $0.
... dom elements in the web console output get a target next to them.
... if you hover over this target, the element is highlighted in the page, and if you click the target, the element is selected in the inspector: ...
Page inspector keyboard shortcuts - Firefox Developer Tools
Tools › Page Inspector › Keyboard shortcuts
command windows macos linux inspect element ctrl + shift + c cmd + shift + c ctrl + shift + c node picker these shortcuts work while the node picker is active.
... command windows macos linux select the element under the mouse and cancel picker mode click click click select the element under the mouse and stay in picker mode shift+click shift+click shift+click html pane these shortcuts work while you're in the inspector's html pane.
... command windows macos linux move to the previous element in the breadcrumbs bar left arrow left arrow left arrow move to the next element in the breadcrumbs bar right arrow right arrow right arrow focus the html pane shift + tab shift + tab shift + tab focus the css pane tab tab tab css pane these shortcuts work when you're in the inspector's css pane.
ANGLE_instanced_arrays - Web APIs
Web › API › ANGLE instanced arrays
ext.drawarraysinstancedangle() behaves identically to gl.drawarrays() except that multiple instances of the range of elements are executed, and the instance advances for each iteration.
... ext.drawelementsinstancedangle() behaves identically to gl.drawelements() except that multiple instances of the set of elements are executed and the instance advances between each set.
... ext.vertexattribdivisorangle() modifies the rate at which generic vertex attributes advance when rendering multiple instances of primitives with ext.drawarraysinstancedangle() and ext.drawelementsinstancedangle().
AnimationEvent() - Web APIs
Web › API › AnimationEvent › AnimationEvent
syntax animationevent = new animationevent(type, {animationname: apropertyname, elapsedtime : afloat, pseudoelement: apseudoelementname}); parameters the animationevent() constructor also inherits arguments from event().
... pseudoelement optional is a domstring, starting with "::", containing the name of the pseudo-element the animation runs on.
... if the animation doesn't run on a pseudo-element but on the element itself, specify an empty string: "".
Attr.namespaceURI - Web APIs
Web › API › Attr › namespaceURI
the attr.namespaceuri read-only property returns the namespace uri of the attribute, or null if the element is not in a namespace.
... you can create an attribute with the specified namespaceuri using the dom level 2 method element.setattributens.
... per the namespaces in xml specification, an attribute does not inherit its namespace from the element it is attached to.
AudioTrack.enabled - Web APIs
Web › API › AudioTrack › enabled
example this example switches between the main and commentary audio tracks of a media element.
... function swapcommentarymain() { var videoelem = document.getelementbyid("main-video"); var audiotrackmain; var audiotrackcommentary; videoelem.audiotracks.foreach(track) { if (track.kind === "main") { audiotrackmain = track; } else if (track.kind === "commentary") { audiotrackcommentary = track; } } if (audiotrackmain && audiotrackcommentary) { var commentaryenabled = audiotrackcommentary.enabled; audiotrackcommentary.enabled = audiotrackmain.enabled; audiotrackmain.enabled = commentaryenabled; } } the swapcommentarymain() function above finds within the audio tracks of the <video> element "main-video" the audio tracks whose kind values are "main" and "commentary".
... the element's audio tracks are then scanned through using the javascript foreach() method (although the audiotracks property of a media element isn't actually a javascript array, it can be accessed like one for the most part).
AudioTrack - Web APIs
Web › API › AudioTrack
the audiotrack interface represents a single audio track from one of the html media elements, <audio> or <video>.
... usage notes to get an audiotrack for a given media element, use the element's audiotracks property, which returns an audiotracklist object from which you can get the individual tracks contained in the media: var el = document.queryselector("video"); var tracks = el.audiotracks; you can then access the media's individual tracks using either array syntax or functions such as foreach().
... example this example returns an array of track kinds and labels for potential use in a user interface to select audio tracks for a specified media element.
AudioTrackList.length - Web APIs
Web › API › AudioTrackList › length
the read-only audiotracklist property length returns the number of entries in the audiotracklist, each of which is an audiotrack representing one audio track in the media element.
... example this snippet gets the number of audio tracks in the first <video> element found in the dom by queryselector().
... var videoelem = document.queryselector("video"); var numaudiotracks = 0; if (videoelem.audiotracks) { numaudiotracks = videoelem.audiotracks.length; } note that this sample checks to be sure htmlmediaelement.audiotracks is defined, to avoid failing on browsers without support for audiotrack.
AudioTrackList.onaddtrack - Web APIs
Web › API › AudioTrackList › onaddtrack
the audiotracklist property onaddtrack is an event handler which is called when the addtrack event occurs, indicating that a new audio track has been added to the media element whose audio tracks the audiotracklist represents.
... usage notes the addtrack event is called whenever a new track is added to the media element whose audio tracks are represented by the audiotracklist object.
... this happens when tracks are added to the element when the media is first attached to the element; one addtrack event will occur for each audio track in the media resource.
CSSImageValue - Web APIs
Web › API › CSSImageValue
the cssimagevalue object represents an <image> that involves an url, such as url() or image(), but not linear-gradient() or element() .
... examples we create an element <button>magic wand</button> we add some css, including a background image requesting a binary file: button { display: inline-block; min-height: 100px; min-width: 100px; background: no-repeat 5% center url(https://mdn.mozillademos.org/files/16793/magicwand.png) aqua; } we get the element's style map.
... we then get() the background-image from the stylemap and stringify it: // get the element const button = document.queryselector( 'button' ); // retrieve all computed styles with computedstylemap() const allcomputedstyles = button.computedstylemap(); // return the cssimagevalue example console.log( allcomputedstyles.get('background-image') ); console.log( allcomputedstyles.get('background-image').tostring() ); specifications specification status comment css typed om level 1the definition of 'cssimagevalue' in that specification.
CSSStyleSheet - Web APIs
Web › API › CSSStyleSheet
addrule() adds a new rule to the stylesheet given the selector to which the style applies and the style block to apply to the matching elements.
...to create a new stylesheet, insert a <style> or <link> element into the document.
... stylesheets list getting the owner element/rule given the style sheet object the interface for the owner object getting the cssstylesheet object from the owner <style> and <link> elements in the document yes .ownernode htmllinkelement, htmlstyleelement, or svgstyleelement .sheet css @import rule in other style sheets applied to the document yes .ownerrule cssimportrule .stylesheet <?xml-stylesheet ?> processing instruction in the (non-html) document yes .ownernode processinginstruction .sheet http link header y...
CSSUnparsedValue.forEach() - Web APIs
Web › API › CSSUnparsedValue › forEach
the cssunparsedvalue.foreach() method executes a provided function once for each element of the cssunparsedvalue.
... syntax cssunparsedvalue.foreach(function callback(currentvalue[, index[, array]]) { // your iterator }[, thisarg]); parameters callback the function to execute for each element, taking three arguments: currentvalue the value of the current element being processed.
... indexoptional the index of the current element being processed.
CSS Painting API - Web APIs
Web › API › CSS Painting API
the css painting api — part of the css houdini umbrella of apis — allows developers to write javascript functions that can draw directly into an element's background, border, or content.
...you can then apply these values to properties like background-image to set complex custom backgrounds on an element.
... examples to draw directly into an element's background using javascript in our css, we define a paint worklet using the registerpaint() function, tell the document to include the worklet using the paintworklet addmodule() method, then include the image we created using the css paint() function.
CanvasCaptureMediaStreamTrack - Web APIs
Web › API › CanvasCaptureMediaStreamTrack
the canvascapturemediastreamtrack interface represents the video track contained in a mediastream being generated from a <canvas> following a call to htmlcanvaselement.capturestream().
... canvascapturemediastreamtrack.canvas read only returns the htmlcanvaselement object whose surface is captured in real-time.
... specifications specification status comment media capture from dom elementsthe definition of 'canvascapturemediastreamtrack' in that specification.
CanvasRenderingContext2D.clearRect() - Web APIs
Web › API › CanvasRenderingContext2D › clearRect
the dimensions of the cleared area are set to equal the <canvas> element's width and height attributes.
... const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.clearrect(0, 0, canvas.width, canvas.height); erasing part of a canvas this example draws a blue triangle on top of a yellowish background.
... const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // draw yellow background ctx.beginpath(); ctx.fillstyle = '#ff6'; ctx.fillrect(0, 0, canvas.width, canvas.height); // draw blue triangle ctx.beginpath(); ctx.fillstyle = 'blue'; ctx.moveto(20, 20); ctx.lineto(180, 20); ctx.lineto(130, 130); ctx.closepath(); ctx.fill(); // clear part of the canvas ctx.clearrect(10, 10, 120, 100); result specifications specification status comment html living standardthe definition of 'canvasrenderingconte...
CanvasRenderingContext2D.createPattern() - Web APIs
Web › API › CanvasRenderingContext2D › createPattern
it can be any of the following: htmlimageelement (<img>) svgimageelement (<image>) htmlvideoelement (<video>, by using the capture of the video) htmlcanvaselement (<canvas>) imagebitmap offscreencanvas repetition a domstring indicating how to repeat the pattern's image.
... the original image looks like this: html <canvas id="canvas" width="300" height="300"></canvas> javascript var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); var img = new image(); img.src = 'https://udn.realityripple.com/samples/04/aaeaf9aac4.png'; img.onload = function() { var pattern = ctx.createpattern(img, 'repeat'); ctx.fillstyle = pattern; ctx.fillrect(0, 0, 300, 300); }; creating a pattern from a canvas in this example we create a pattern from the contents of an offscreen canvas.
... javascript // create a pattern, offscreen const patterncanvas = document.createelement('canvas'); const patterncontext = patterncanvas.getcontext('2d'); // give the pattern a width and height of 50 patterncanvas.width = 50; patterncanvas.height = 50; // give the pattern a background color and draw an arc patterncontext.fillstyle = '#fec'; patterncontext.fillrect(0, 0, patterncanvas.width, patterncanvas.height); patterncontext.arc(0, 0, 50, 0, .5 * math.pi); patterncontext.stroke(); // create our primary canvas and fill it with the pattern const canvas = document.createelement('canvas'); const ctx = canvas.getcontext('2d'); const pattern = ctx.createpattern(patterncanvas, 'repeat'); ctx.fillstyle...
CanvasRenderingContext2D.fillRect() - Web APIs
Web › API › CanvasRenderingContext2D › fillRect
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.fillstyle = 'green'; ctx.fillrect(20, 10, 150, 100); result filling the whole canvas this code snippet fills the entire canvas with a rectangle.
...to achieve this, the dimensions of the rectangle are set to equal the <canvas> element's width and height attributes.
... const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.fillrect(0, 0, canvas.width, canvas.height); specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.fillrect' in that specification.
CanvasRenderingContext2D.filter - Web APIs
Web › API › CanvasRenderingContext2D › filter
takes an iri pointing to an svg filter element, which may be embedded in an external xml file.
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.filter = 'blur(4px)'; ctx.font = '48px serif'; ctx.filltext('hello world', 50, 100); result applying multiple filters you can combine as many filters as you like.
... html <canvas id="canvas"></canvas> <div style="display:none;"> <img id="source" src="https://udn.realityripple.com/samples/90/a34a525ace.jpg"> </div> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const image = document.getelementbyid('source'); image.addeventlistener('load', e => { ctx.filter = 'contrast(1.4) sepia(1) drop-shadow(9px 9px 2px #e81)'; ctx.drawimage(image, 10, 10, 180, 120); }); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.filter' in that specification.
CanvasRenderingContext2D.scrollPathIntoView() - Web APIs
Web › API › CanvasRenderingContext2D › scrollPathIntoView
it is similar to element.scrollintoview().
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.beginpath(); ctx.fillrect(10, 10, 30, 30); ctx.scrollpathintoview(); edit the code below to see your changes update live in the canvas: playable code <canvas id="canvas" width="400" height="200" class="playable-canvas"> <input id="button" type="range" min="1" max="12"> </canvas> <div class="playable-buttons"> <input id="edit" type="button" value="edit" /> <input id="reset" type="button" value="reset" /> </div> <textarea id=...
..."code" class="playable-code"> ctx.beginpath(); ctx.rect(10, 10, 30, 30); ctx.scrollpathintoview();</textarea> var canvas = document.getelementbyid("canvas"); var ctx = canvas.getcontext("2d"); var textarea = document.getelementbyid("code"); var reset = document.getelementbyid("reset"); var edit = document.getelementbyid("edit"); var code = textarea.value; function drawcanvas() { ctx.clearrect(0, 0, canvas.width, canvas.height); eval(textarea.value); } reset.addeventlistener("click", function() { textarea.value = code; drawcanvas(); }); edit.addeventlistener("click", function() { textarea.focus(); }) textarea.addeventlistener("input", drawcanvas); window.addeventlistener("load", drawcanvas); specifications specification status comment html living stand...
CanvasRenderingContext2D.setLineDash() - Web APIs
Web › API › CanvasRenderingContext2D › setLineDash
if the number of elements in the array is odd, the elements of the array get copied and concatenated.
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // dashed line ctx.beginpath(); ctx.setlinedash([5, 15]); ctx.moveto(0, 50); ctx.lineto(300, 50); ctx.stroke(); // solid line ctx.beginpath(); ctx.setlinedash([]); ctx.moveto(0, 100); ctx.lineto(300, 100); ctx.stroke(); result some common patterns this example illustrates a variety of common line dash patterns.
... function drawdashedline(pattern) { ctx.beginpath(); ctx.setlinedash(pattern); ctx.moveto(0, y); ctx.lineto(300, y); ctx.stroke(); y += 20; } const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); let y = 15; drawdashedline([]); drawdashedline([1, 1]); drawdashedline([10, 10]); drawdashedline([20, 5]); drawdashedline([15, 3, 3, 3]); drawdashedline([20, 3, 3, 3, 3, 3, 3, 3]); drawdashedline([12, 3, 3]); // equals [12, 3, 3, 12, 3, 3] result specifications specification status comment html living standardthe definition of 'canv...
CanvasRenderingContext2D.stroke() - Web APIs
Web › API › CanvasRenderingContext2D › stroke
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.rect(10, 10, 150, 100); ctx.stroke(); result re-stroking paths typically, you'll want to call beginpath() for each new thing you want to stroke.
... const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // first sub-path ctx.linewidth = 26; ctx.strokestyle = 'orange'; ctx.moveto(20, 20); ctx.lineto(160, 20); ctx.stroke(); // second sub-path ctx.linewidth = 14; ctx.strokestyle = 'green'; ctx.moveto(20, 80); ctx.lineto(220, 80); ctx.stroke(); // third sub-path ctx.linewidth = 4; ctx.strokestyle = 'pink'; ctx.moveto(20, 140); ctx.lineto(280, 140); ctx.stroke(); result ...
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.linewidth = 16; ctx.strokestyle = 'red'; // stroke on top of fill ctx.beginpath(); ctx.rect(25, 25, 100, 100); ctx.fill(); ctx.stroke(); // fill on top of stroke ctx.beginpath(); ctx.rect(175, 25, 100, 100); ctx.stroke(); ctx.fill(); result specifications specification status comment html living standardthe definition of 'canvasrenderingcon...
A basic ray-caster - Web APIs
Web › API › Canvas API › A basic ray-caster
this article provides an interesting real-world example of using the <canvas> element to do software rendering of a 3d environment using ray-casting.
... after realizing, to my delight, that the nifty <canvas> element i'd been reading about was not only soon to be supported in firefox, but was already supported in the current version of safari, i had to try a little experiment.
... so there you are, fire up safari 1.3+ or firefox 1.5+ or some other browser that supports the <canvas> element and enjoy!
ChildNode.before() - Web APIs
Web › API › ChildNode › before
examples inserting an element var parent = document.createelement("div"); var child = document.createelement("p"); parent.appendchild(child); var span = document.createelement("span"); child.before(span); console.log(parent.outerhtml); // "<div><span></span><p></p></div>" inserting text var parent = document.createelement("div"); var child = document.createelement("p"); parent.appendchild(child); child.before("text"); ...
... console.log(parent.outerhtml); // "<div>text<p></p></div>" inserting an element and text var parent = document.createelement("div"); var child = document.createelement("p"); parent.appendchild(child); var span = document.createelement("span"); child.before(span, "text"); console.log(parent.outerhtml); // "<div><span></span>text<p></p></div>" childnode.before() is unscopable the before() method is not scoped into the with statement.
...argitem : document.createtextnode(string(argitem))); }); this.parentnode.insertbefore(docfrag, this); } }); }); })([element.prototype, characterdata.prototype, documenttype.prototype]); specification specification status comment domthe definition of 'childnode.before()' in that specification.
Console.table() - Web APIs
Web › API › Console › table
each element in the array (or enumerable property if data is an object) will be a row in the table.
... // an array of strings console.table(["apples", "oranges", "bananas"]); // an object whose properties are strings function person(firstname, lastname) { this.firstname = firstname; this.lastname = lastname; } var me = new person("john", "smith"); console.table(me); collections of compound types if the elements in the array, or properties in the object, are themselves arrays or objects, then their elements or properties are enumerated in the row, one per column: // an array of arrays var people = [["john", "smith"], ["jane", "doe"], ["emily", "jones"]] console.table(people); // an array of objects function person(firstname, lastname) { this.firstname = firstname; this.lastname = lastname; } ...
... // an object whose properties are objects var family = {}; family.mother = new person("jane", "smith"); family.father = new person("john", "smith"); family.daughter = new person("emily", "smith"); console.table(family); restricting the columns displayed by default, console.table() lists all elements in each row.
DOMImplementation.createHTMLDocument() - Web APIs
Web › API › DOMImplementation › createHTMLDocument
here's the html for this example: <body> <p>click <a href="javascript:makedocument()">here</a> to create a new document and insert it below.</p> <iframe id="theframe" src="about:blank" /> </body> the javascript implementation of makedocument() follows: function makedocument() { let frame = document.getelementbyid("theframe"); let doc = document.implementation.createhtmldocument("new document"); let p = doc.createelement("p"); p.innerhtml = "this is a new paragraph."; try { doc.body.appendchild(p); } catch(e) { console.log(e); } // copy the new html document into the frame let destdocument = frame.contentdocument; let srcnode = doc.documentelement; let newnode = destdocu...
...ment.importnode(srcnode, true); destdocument.replacechild(newnode, destdocument.documentelement); } the code in lines 4–12 handle creating the new html document and inserting some content into it.
...lines 5 and 6 create a new paragraph element with some simple content, and then lines 8–12 handle inserting the new paragraph into the new document.
DOMTokenList.forEach() - Web APIs
Web › API › DOMTokenList › forEach
syntax tokenlist.foreach(callback [, thisarg]); parameters callback function to execute for each element, eventually taking three arguments: currentvalue the current element being processed in the array.
... currentindex the index of the current element being processed in the array.
... example in the following example we retrieve the list of classes set on a <span> element as a domtokenlist using element.classlist.
DOMTokenList - Web APIs
Web › API › DOMTokenList
such a set is returned by element.classlist, htmllinkelement.rellist, htmlanchorelement.rellist, htmlareaelement.rellist, htmliframeelement.sandbox, or htmloutputelement.htmlfor.
... domtokenlist.foreach(callback [, thisarg]) executes a provided callback function once per domtokenlist element.
... examples in the following simple example, we retrieve the list of classes set on a <p> element as a domtokenlist using element.classlist, add a class using domtokenlist.add(), and then update the node.textcontent of the <p> to equal the domtokenlist.
DataTransferItemList.DataTransferItem() - Web APIs
Web › API › DataTransferItemList › DataTransferItem
javascript function dragstart_handler(ev) { console.log("dragstart"); // add this element's id to the drag payload so the drop handler will // know which element to add to its tree var datalist = ev.datatransfer.items; datalist.add(ev.target.id, "text/plain"); // add some other items to the drag payload datalist.add("<p>...
...tion drop_handler(ev) { console.log("drop"); ev.preventdefault(); var data = ev.datatransfer.items; // loop through the dropped items and log their data for (var i = 0; i < data.length; i++) { if ((data[i].kind == 'string') && (data[i].type.match('^text/plain'))) { // this item is the target node data[i].getasstring(function (s){ ev.target.appendchild(document.getelementbyid(s)); }); } else if ((data[i].kind == 'string') && (data[i].type.match('^text/html'))) { // drag data item is html data[i].getasstring(function (s){ console.log("...
...ver"); ev.preventdefault(); // set the dropeffect to move ev.datatransfer.dropeffect = "move" } function dragend_handler(ev) { console.log("dragend"); var datalist = ev.datatransfer.items; // clear any remaining drag data datalist.clear(); } html <div> <p id="source" ondragstart="dragstart_handler(event);" ondragend="dragend_handler(event);" draggable="true"> select this element, drag it to the drop zone and then release the selection to move the element.</p> </div> <div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">drop zone</div> css div { margin: 0em; padding: 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; } result drag and drop demo link specifications specif...
DataTransferItemList.add() - Web APIs
Web › API › DataTransferItemList › add
html <div> <p id="source" ondragstart="dragstart_handler(event);" ondragend="dragend_handler(event);" draggable="true"> select this element, drag it to the drop zone and then release the selection to move the element.</p> </div> <div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">drop zone</div> css div { margin: 0em; padding: 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; } javascript function dragstart_handler(ev) { console.log("dragstart"...
...); // add this element's id to the drag payload so the drop handler will // know which element to add to its tree var datalist = ev.datatransfer.items; datalist.add(ev.target.id, "text/plain"); // add some other items to the drag payload datalist.add("<p>...
...n drop_handler(ev) { console.log("drop"); ev.preventdefault(); var data = event.datatransfer.items; // loop through the dropped items and log their data for (var i = 0; i < data.length; i++) { if ((data[i].kind == 'string') && (data[i].type.match('^text/plain'))) { // this item is the target node data[i].getasstring(function (s){ ev.target.appendchild(document.getelementbyid(s)); }); } else if ((data[i].kind == 'string') && (data[i].type.match('^text/html'))) { // drag data item is html data[i].getasstring(function (s){ console.log("...
DataTransferItemList.clear() - Web APIs
Web › API › DataTransferItemList › clear
html <div> <p id="source" ondragstart="dragstart_handler(event);" ondragend="dragend_handler(event);" draggable="true"> select this element, drag it to the drop zone and then release the selection to move the element.</p> </div> <div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">drop zone</div> css div { margin: 0em; padding: 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; } javascript function dragstart_handler(ev) { ...
... console.log("dragstart"); // add this element's id to the drag payload so the drop handler will // know which element to add to its tree var datalist = ev.datatransfer.items; datalist.add(ev.target.id, "text/plain"); // add some other items to the drag payload datalist.add("<p>...
...n drop_handler(ev) { console.log("drop"); ev.preventdefault(); var data = event.datatransfer.items; // loop through the dropped items and log their data for (var i = 0; i < data.length; i++) { if ((data[i].kind == 'string') && (data[i].type.match('^text/plain'))) { // this item is the target node data[i].getasstring(function (s){ ev.target.appendchild(document.getelementbyid(s)); }); } else if ((data[i].kind == 'string') && (data[i].type.match('^text/html'))) { // drag data item is html data[i].getasstring(function (s){ console.log("...
DataTransferItemList.length - Web APIs
Web › API › DataTransferItemList › length
javascript function dragstart_handler(ev) { console.log("dragstart"); // add this element's id to the drag payload so the drop handler will // know which element to add to its tree var datalist = ev.datatransfer.items; datalist.add(ev.target.id, "text/plain"); // add some other items to the drag payload datalist.add("<p>...
...tion drop_handler(ev) { console.log("drop"); ev.preventdefault(); var data = ev.datatransfer.items; // loop through the dropped items and log their data for (var i = 0; i < data.length; i++) { if ((data[i].kind == 'string') && (data[i].type.match('^text/plain'))) { // this item is the target node data[i].getasstring(function (s){ ev.target.appendchild(document.getelementbyid(s)); }); } else if ((data[i].kind == 'string') && (data[i].type.match('^text/html'))) { // drag data item is html data[i].getasstring(function (s){ console.log("...
...ver"); ev.preventdefault(); // set the dropeffect to move ev.datatransfer.dropeffect = "move" } function dragend_handler(ev) { console.log("dragend"); var datalist = ev.datatransfer.items; // clear any remaining drag data datalist.clear(); } html <div> <p id="source" ondragstart="dragstart_handler(event);" ondragend="dragend_handler(event);" draggable="true"> select this element, drag it to the drop zone and then release the selection to move the element.</p> </div> <div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">drop zone</div> css div { margin: 0em; padding: 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; } result drag and drop demo link specifications specif...
DataTransferItemList.remove() - Web APIs
Web › API › DataTransferItemList › remove
javascript function dragstart_handler(ev) { console.log("dragstart"); // add this element's id to the drag payload so the drop handler will // know which element to add to its tree var datalist = ev.datatransfer.items; datalist.add(ev.target.id, "text/plain"); // add some other items to the drag payload datalist.add("<p>...
...n drop_handler(ev) { console.log("drop"); ev.preventdefault(); var data = event.datatransfer.items; // loop through the dropped items and log their data for (var i = 0; i < data.length; i++) { if ((data[i].kind == 'string') && (data[i].type.match('^text/plain'))) { // this item is the target node data[i].getasstring(function (s){ ev.target.appendchild(document.getelementbyid(s)); }); } else if ((data[i].kind == 'string') && (data[i].type.match('^text/html'))) { // drag data item is html data[i].getasstring(function (s){ console.log("...
..."); var datalist = ev.datatransfer.items; for (var i = 0; i < datalist.length; i++) { datalist.remove(i); } // clear any remaining drag data datalist.clear(); } html <h1>example uses of <code>datatransferitemlist</code> methods and property</h1> <div> <p id="source" ondragstart="dragstart_handler(event);" ondragend="dragend_handler(event);" draggable="true"> select this element, drag it to the drop zone and then release the selection to move the element.</p> </div> <div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">drop zone</div> css div { margin: 0em; padding: 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; } specifications specification ...
Document: animationend event - Web APIs
Web › API › Document › animationend event
if the animation aborts before reaching completion, such as if the element is removed from the dom or the animation is removed from the element, the animationend event is not fired.
... bubbles yes cancelable no interface animationevent event handler property onanimationend the original target for this event is the element that had the animation applied.
...for full details on this event please see the page on htmlelement: animationend.
Document.createDocumentFragment() - Web APIs
Web › API › Document › createDocumentFragment
the usual use case is to create the document fragment, append elements to the document fragment and then append the document fragment to the dom tree.
... since the document fragment is in memory and not part of the main dom tree, appending children to it does not cause page reflow (computation of element's position and geometry).
... html <ul id="ul"> </ul> javascript var element = document.getelementbyid('ul'); // assuming ul exists var fragment = document.createdocumentfragment(); var browsers = ['firefox', 'chrome', 'opera', 'safari', 'internet explorer']; browsers.foreach(function(browser) { var li = document.createelement('li'); li.textcontent = browser; fragment.appendchild(li); }); element.appendchild(fragment); result specifications specification ...
Document.createNSResolver() - Web APIs
Web › API › Document › createNSResolver
note, xpath defines qnames without prefix to match only elements in the null namespace.
... there is no way in xpath to pick up the default namespace as applied to a regular element reference (e.g., p[@id='_myid'] for xmlns='http://www.w3.org/1999/xhtml').
... to match default elements in a non-null namespace, you either have to refer to a particular element using a form such as *namespace-uri()=http://www.w3.org/1999/xhtml and name()=p[@id='_myid'] (this approach works well for dynamic xpath expressions where the namespaces might not be known) or use prefixed name tests, and create a namespace resolver mapping the prefix to the namespace.
Document.currentScript - Web APIs
Web › API › Document › currentScript
the document.currentscript property returns the <script> element whose script is currently being processed and isn't a javascript module.
... (for modules use import.meta instead.) it's important to note that this will not reference the <script> element if the code in the script is being called as a callback or event handler; it will only reference the element while it's initially being processed.
... syntax var curscriptelement = document.currentscript; example this example checks to see if the script is being executed asynchronously: if (document.currentscript.async) { console.log("executing asynchronously"); } else { console.log("executing synchronously"); } view live examples specifications specification status comment html living standardthe definition of 'document.currentscript' in that specification.
Document: drag event - Web APIs
Web › API › Document › drag event
the drag event is fired every few hundred milliseconds as an element or text selection is being dragged by the user.
...deventlistener("dragend", function(event) { // reset the transparency event.target.style.opacity = ""; }, false); /* events fired on the drop targets */ document.addeventlistener("dragover", function(event) { // prevent default to allow drop event.preventdefault(); }, false); document.addeventlistener("dragenter", function(event) { // highlight potential drop target when the draggable element enters it if (event.target.classname == "dropzone") { event.target.style.background = "purple"; } }, false); document.addeventlistener("dragleave", function(event) { // reset background of potential drop target when the draggable element leaves it if (event.target.classname == "dropzone") { event.target.style.background = ""; } }, false); document.addeventlistener("drop", fu...
...nction(event) { // prevent default action (open as link for some elements) event.preventdefault(); // move dragged elem to the selected drop target if (event.target.classname == "dropzone") { event.target.style.background = ""; dragged.parentnode.removechild( dragged ); event.target.appendchild( dragged ); } }, false); specifications specification status comment html living standardthe definition of 'drag event' in that specification.
Document: dragenter event - Web APIs
Web › API › Document › dragenter event
the dragenter event is fired when a dragged element or text selection enters a valid drop target.
... the target object is the immediate user selection (the element directly indicated by the user as the drop target), or the <body> element.
... bubbles yes cancelable yes default action reject immediate user selection as potential target element.
Document.evaluate() - Web APIs
Web › API › Document › evaluate
null is the most common and will create a new xpathresult example var headings = document.evaluate("/html/body//h2", document, null, xpathresult.any_type, null); /* search the document for all h2 elements.
...*/ var thisheading = headings.iteratenext(); var alerttext = "level 2 headings in this document are:\n"; while (thisheading) { alerttext += thisheading.textcontent + "\n"; thisheading = headings.iteratenext(); } alert(alerttext); // alerts the text of all h2 elements note, in the above example, a more verbose xpath is preferred over common shortcuts such as //h2.
...for example, if you know the content you are looking for is somewhere inside the body tag, you can use this: document.evaluate(".//h2", document.body, null, xpathresult.any_type, null); notice in the above document.body has been used as the context instead of document so the xpath starts from the body element.
Document.exitFullscreen() - Web APIs
Web › API › Document › exitFullscreen
the document method exitfullscreen() requests that the element on this document which is currently being presented in full-screen mode be taken out of full-screen mode, restoring the previous state of the screen.
... this usually reverses the effects of a previous call to element.requestfullscreen().
... document.onclick = function (event) { if (document.fullscreenelement) { document.exitfullscreen() .then(() => console.log("document exited form full screen mode")) .catch((err) => console.error(err)) } else { document.documentelement.requestfullscreen(); } } note: for a more complete example, see the example in element.requestfullscreen().
Document.fullscreen - Web APIs
Web › API › Document › fullscreen
note: since this property is deprecated, you can determine if full-screen mode is active on the document by checking to see if document.fullscreenelement is not null.
... syntax var isfullscreen = document.fullscreen; value a boolean value which is true if the document is currently displaying an element in full-screen mode; otherwise, the value is false.
... function isdocumentinfullscreenmode() { return document.fullscreen; } this next example, on the other hand, uses the current fullscreenelement property to determine the same thing: function isdocumentinfullscreenmode() { return document.fullscreenelement !== null; } if fullscreenelement isn't null, this returns true, indicating that full-screen mode is in effect.
Document: gotpointercapture event - Web APIs
Web › API › Document › gotpointercapture event
the gotpointercapture event is fired when an element captures a pointer using setpointercapture().
... bubbles no cancelable no interface pointerevent event handler property ongotpointercapture examples this example gets a <p> element and listens for the gotpointercapture event.
... it then calls setpointercapture() on the element on a pointerdown event, which will trigger gotpointercapture.
Document.height - Web APIs
Web › API › Document › height
see element.clientheight.
...in most cases, this is equal to the <body> element of the current document.
... syntax pixels = document.height example // alert document height alert(document.height); alternatives document.body.clientheight document.documentelement.clientheight document.documentelement.scrollheight specification html5 ...
Document.onafterscriptexecute - Web APIs
Web › API › Document › onafterscriptexecute
the document.onafterscriptexecute property references a function that fires when a static <script> element finishes executing its script.
... it does not fire if the element is added dynamically, such as with appendchild().
...the event's target attribute is set to the <script> element that just finished executing.
Document.onbeforescriptexecute - Web APIs
Web › API › Document › onbeforescriptexecute
fired when the code in a <script> element declared in an html document is about to start executing.
... does not fire if the element is added dynamically, eg with appendchild().
...the event's target attribute is set to the script element that is about to be executed.
Document.onfullscreenchange - Web APIs
Web › API › Document › onfullscreenchange
usage notes the fullscreenchange event does not directly specify whether the transition is into or out of full-screen mode, so your event handler should look at the value of document.fullscreenelement.
...otherwise, the specified element is about to take over the screen.
... example document.onfullscreenchange = function ( event ) { console.log("full screen change") }; document.documentelement.onclick = function () { // requestfullscreen() must be in an event handler or it will fail document.documentelement.requestfullscreen(); } specifications specification status comment fullscreen apithe definition of 'onfullscreenchange' in that specification.
Document.scripts - Web APIs
Web › API › Document › scripts
the scripts property of the document interface returns a list of the <script> elements in the document.
...you can use this just like an array to get all the elements in the list.
... example this example looks to see if the page has any <script> elements.
Document.title - Web APIs
Web › API › Document › title
the content of the <title> element in an html document).
... for html documents the initial value of document.title is the text content of the <title> element.
... for xul it's the value of the title attribute of the <xul:window> or other top-level xul element.
Document.width - Web APIs
Web › API › Document › width
see element.clientwidth.
... returns the width of the <body> element of the current document in pixels.
... syntax pixels = document.width; example function init() { alert("the width of the document is " + document.width + " pixels."); } alternatives document.body.clientwidth /* width of <body> */ document.documentelement.clientwidth /* width of <html> */ window.innerwidth /* window's width */ specification html5 ...
DocumentFragment.querySelectorAll() - Web APIs
Web › API › DocumentFragment › querySelectorAll
the documentfragment.queryselectorall() method returns a nodelist of elements within the documentfragment (using depth-first pre-order traversal of the document's nodes) that matches the specified group of selectors.
... syntax elementlist = documentfragment.queryselectorall(selectors); parameters selectors is a domstring containing one or more css selectors separated by commas.
... examples this example returns a list of all div elements within the documentfragment with a class of either "note" or "alert": var matches = documentfrag.queryselectorall("div.note, div.alert"); specifications specification status comment selectors api level 1the definition of 'documentfragment.queryselectorall' in that specification.
DocumentOrShadowRoot.getSelection() - Web APIs
Web › API › DocumentOrShadowRoot › getSelection
it is worth noting that currently getselection() doesn't work on the content of <input> elements in firefox.
... htmlinputelement.setselectionrange()) could be used to work around this.
...document.activeelement returns the focused element.
How to create a DOM tree - Web APIs
Web › API › Document Object Model › How to create a DOM tree
ntry="usa"/> <address street="123 west st" city="seattle" state="wa" country="usa"/> <address street="321 south avenue" city="denver" state="co" country="usa"/> </person> </people> the w3c dom api, supported by mozilla, can be used to create an in-memory representation of this document like so: var doc = document.implementation.createdocument("", "", null); var peopleelem = doc.createelement("people"); var personelem1 = doc.createelement("person"); personelem1.setattribute("first-name", "eric"); personelem1.setattribute("middle-initial", "h"); personelem1.setattribute("last-name", "jung"); var addresselem1 = doc.createelement("address"); addresselem1.setattribute("street", "321 south st"); addresselem1.setattribute("city", "denver"); addresselem1.setattribute("state", "co"); addres...
...selem1.setattribute("country", "usa"); personelem1.appendchild(addresselem1); var addresselem2 = doc.createelement("address"); addresselem2.setattribute("street", "123 main st"); addresselem2.setattribute("city", "arlington"); addresselem2.setattribute("state", "ma"); addresselem2.setattribute("country", "usa"); personelem1.appendchild(addresselem2); var personelem2 = doc.createelement("person"); personelem2.setattribute("first-name", "jed"); personelem2.setattribute("last-name", "brown"); var addresselem3 = doc.createelement("address"); addresselem3.setattribute("street", "321 north st"); addresselem3.setattribute("city", "atlanta"); addresselem3.setattribute("state", "ga"); addresselem3.setattribute("country", "usa"); personelem2.appendchild(addresselem3); var addresselem4 = doc.createeleme...
...nt("address"); addresselem4.setattribute("street", "123 west st"); addresselem4.setattribute("city", "seattle"); addresselem4.setattribute("state", "wa"); addresselem4.setattribute("country", "usa"); personelem2.appendchild(addresselem4); var addresselem5 = doc.createelement("address"); addresselem5.setattribute("street", "321 south avenue"); addresselem5.setattribute("city", "denver"); addresselem5.setattribute("state", "co"); addresselem5.setattribute("country", "usa"); personelem2.appendchild(addresselem5); peopleelem.appendchild(personelem1); peopleelem.appendchild(personelem2); doc.appendchild(peopleelem); see also the dom chapter of the xul tutorial.
EffectTiming - Web APIs
Web › API › EffectTiming
the effecttiming dictionary, part of the web animations api, is used by element.animate(), keyframeeffectreadonly(), and keyframeeffect() to describe timing properties for animation effects.
... fill optional dictates whether the animation's effects should be reflected by the element(s) prior to playing ("backwards"), retained after the animation has completed playing ("forwards"), or both.
...defaults to 1, and can also take a value of infinity to make it repeat for as long as the element exists.
Event.currentTarget - Web APIs
Web › API › Event › currentTarget
it always refers to the element to which the event handler has been attached, as opposed to event.target, which identifies the element on which the event occurred and which may be its descendant.
... syntax var currenteventtarget = event.currenttarget; value eventtarget examples event.currenttarget is interesting to use when attaching the same event handler to several elements.
... function hide(e){ e.currenttarget.style.visibility = 'hidden'; console.log(e.currenttarget); // when this function is used as an event handler: this === e.currenttarget } var ps = document.getelementsbytagname('p'); for(var i = 0; i < ps.length; i++){ // console: print the clicked <p> element ps[i].addeventlistener('click', hide, false); } // console: print <body> document.body.addeventlistener('click', hide, false); // click around and make paragraphs disappear note: the value of event.currenttarget is only available while the event is being handled.
Event.preventDefault() - Web APIs
Web › API › Event › preventDefault
this example demonstrates how to prevent that from happening: javascript document.queryselector("#id-checkbox").addeventlistener("click", function(event) { document.getelementbyid("output-box").innerhtml += "sorry!
...first, listen for keypress events: var mytextbox = document.getelementbyid('my-textbox'); mytextbox.addeventlistener('keypress', checkname, false); the checkname() function, which looks at the pressed key and decides whether to allow it: function checkname(evt) { var charcode = evt.charcode; if (charcode != 0) { if (charcode < 97 || charcode > 122) { evt.preventdefault(); displaywarning( "please use lowercase letters only." + "...
...it's not an elegant function but does the job for the purposes of this example: var warningtimeout; var warningbox = document.createelement("div"); warningbox.classname = "warning"; function displaywarning(msg) { warningbox.innerhtml = msg; if (document.body.contains(warningbox)) { window.cleartimeout(warningtimeout); } else { // insert warningbox after mytextbox mytextbox.parentnode.insertbefore(warningbox, mytextbox.nextsibling); } warningtimeout = window.settimeout(function() { warningbox.parentnode.removechild(warningbox); warningtimeout = -1; }, 2000); } result notes calling preventdefault() during any stage of event fl...
Using Fetch - Web APIs
Web › API › Fetch API › Using Fetch
ample' }; fetch('https://example.com/profile', { method: 'post', // or 'put' headers: { 'content-type': 'application/json', }, body: json.stringify(data), }) .then(response => response.json()) .then(data => { console.log('success:', data); }) .catch((error) => { console.error('error:', error); }); uploading a file files can be uploaded using an html <input type="file" /> input element, formdata() and fetch().
...sername', 'abc123'); formdata.append('avatar', filefield.files[0]); fetch('https://example.com/profile/avatar', { method: 'put', body: formdata }) .then(response => response.json()) .then(result => { console.log('success:', result); }) .catch(error => { console.error('error:', error); }); uploading multiple files files can be uploaded using an html <input type="file" multiple /> input element, formdata() and fetch().
... request bodies can be set by passing body parameters: const form = new formdata(document.getelementbyid('login-form')); fetch('/login', { method: 'post', body: form }); both request and response (and by extension the fetch() function), will try to intelligently determine the content type.
File and Directory Entries API - Web APIs
Web › API › File and Directory Entries API
only for accessing files which are selected by the user in a file <input> element (see htmlinputelement as well) or when a file or directory is provided to the web site or app using drag and drop.
... the htmlinputelement.webkitentries property lets you access the filesystemfileentry objects for the currently selected files, but only if they are dragged-and-dropped onto the file chooser (bug 1326031).
... if htmlinputelement.webkitdirectory is true, the <input> element is instead a directory picker, and you get filesystemdirectoryentry objects for each selected directory.
GeolocationCoordinates.longitude - Web APIs
Web › API › GeolocationCoordinates › longitude
let button = document.getelementbyid("get-location"); let lattext = document.getelementbyid("latitude"); let longtext = document.getelementbyid("longitude"); button.addeventlistener("click", function() { navigator.geolocation.getcurrentposition(function(position) { let lat = position.coords.latitude; let long = position.coords.longitude; lattext.innertext = lat.tofixed(2); longtext.innertext = long.tofixed(2)...
...; }); }); after setting up variables to more conveniently reference the button element and the two elements into which the latitude and logitude will be drawn, the event listener is established by calling addeventlistener() on the <button> element.
...the two <span> elements are updated to display the corresponding values after being converted to a value with two decimal places.
GlobalEventHandlers.onanimationcancel - Web APIs
Web › API › GlobalEventHandlers › onanimationcancel
syntax var animcancelhandler = target.onanimationcancel; target.onanimationcancel = function value a function to be called when an animationcancel event occurs indicating that a css animation has begun on the target, where the target object is an html element (htmlelement), document (document), or window (window).
... function log(msg, event) { let logbox = document.getelementbyid("log"); logbox.innerhtml += msg; if (event) { logbox.innerhtml += " <code>"+ event.animationname + "</code> at time " + event.elapsedtime.tofixed(2) + " seconds."; } logbox.innerhtml += "\n"; }; then we set up the handlecancelevent() function, which is called in response to the animationcancel event, as set up in the html above.
... function handlecancelevent(event) { log("animation canceled", event); }; then we add a method to handle toggle display between "flex" and "none" and establish it as the handler for a click event on the "hide/show" the box button: document.getelementbyid('togglebox').addeventlistener('click', function() { if (box.style.display == "none") { box.style.display = "flex"; document.getelementbyid("togglebox").innerhtml = "hide the box"; } else { box.style.display = "none"; document.getelementbyid("togglebox").innerhtml = "show the box"; } }); toggling the box to display: none has the effect of aborting its animation.
GlobalEventHandlers.onanimationend - Web APIs
Web › API › GlobalEventHandlers › onanimationend
syntax var animendhandler = target.onanimationend; target.onanimationend = function value a function to be called when an animationend event occurs indicating that a css animation has begun on the target, where the target object is an html element (htmlelement), document (document), or window (window).
... function log(msg, event) { let logbox = document.getelementbyid("log"); logbox.innerhtml += msg; if (event) { logbox.innerhtml += " <code>"+ event.animationname + "</code> at time " + event.elapsedtime.tofixed(2) + " seconds."; } logbox.innerhtml += "\n"; }; then we set up the event handlers for the animationstart and animationend events: let box = document.getelementbyid("box"); box.onanimationstart = function(event) { ...
... log("animation started", event); } box.onanimationend = function(event) { log("animation stopped", event); }; finally, we set up a handler for a click on the button that runs the animation: document.getelementbyid("play").addeventlistener("click", function(event) { document.getelementbyid("box").classname = "slideanimation"; event.target.style.display = "none"; }, false); this sets the class of the box we want to animate to the class that contains the animation description, then hides the play button because this example will only run the animation once.
GlobalEventHandlers.onanimationiteration - Web APIs
Web › API › GlobalEventHandlers › onanimationiteration
syntax var animiterationhandler = target.onanimationiteration; target.onanimationiteration = function value a function to be called when an animationiteration event occurs indicating that a css animation has reached the end of an iteration while running on the target, where the target object is an html element (htmlelement), document (document), or window (window).
... var box = document.getelementbyid("box"); var iterationcounter = 0; box.onanimationiteration = function(event) { box.style.animationplaystate = "paused"; document.getelementbyid("play").innerhtml = "start iteration #" + (iterationcounter+1); }; this sets up two global variables: box, which references the "box" element that we're animating, and iterationcounter, which is initially zero, which indicates how many iteratio...
... finally, we set up a handler for a click on the button that runs the animation: document.getelementbyid("play").addeventlistener("click", function(event) { box.style.animationplaystate = "running"; iterationcounter++; }, false); this sets the box element's animation-play-state to "running" and increments the iteration counter.
GlobalEventHandlers.onanimationstart - Web APIs
Web › API › GlobalEventHandlers › onanimationstart
syntax var animstarthandler = target.onanimationstart; target.onanimationstart = function value a function to be called when an animationstart event occurs indicating that a css animation has begun on the target, where the target object is an html element (htmlelement), document (document), or window (window).
... function log(msg, event) { let logbox = document.getelementbyid("log"); logbox.innerhtml += msg; if (event) { logbox.innerhtml += " <code>"+ event.animationname + "</code> at time " + event.elapsedtime.tofixed(2) + " seconds."; } logbox.innerhtml += "\n"; }; then we set up the event handlers for the animationstart and animationend events: let box = document.getelementbyid("box"); box.onanimationstart = function(event) { ...
... log("animation started", event); } box.onanimationend = function(event) { log("animation stopped", event); }; finally, we set up a handler for a click on the button that runs the animation: document.getelementbyid("play").addeventlistener("click", function(event) { document.getelementbyid("box").classname = "slideanimation"; event.target.style.display = "none"; }, false); this sets the class of the box we want to animate to the class that contains the animation description, then hides the play button because this example will only run the animation once.
GlobalEventHandlers.onblur - Web APIs
Web › API › GlobalEventHandlers › onblur
it's available on element, document, and window.
... the blur event is raised when an element loses focus.
... example this example uses onblur and onfocus to change the text within an <input> element.
GlobalEventHandlers.onchange - Web APIs
Web › API › GlobalEventHandlers › onchange
note: unlike oninput, the onchange event handler is not necessarily called for each alteration to an element's value.
... example this example logs the number of characters in an <input> element, every time you modify its contents and then change focus away from it.
... html <input type="text" placeholder="type something here, then click outside of the field." size="50"> <p id="log"></p> javascript let input = document.queryselector('input'); let log = document.getelementbyid('log'); input.onchange = handlechange; function handlechange(e) { log.textcontent = `the field's value is ${e.target.value.length} character(s) long.`; } result specification specification status comment html living standardthe definition of 'onchange' in that specification.
GlobalEventHandlers.oninvalid - Web APIs
Web › API › GlobalEventHandlers › oninvalid
the invalid event fires when a submittable element has been checked and doesn't satisfy its constraints.
... the validity of submittable elements is checked before submitting their owner form, or after the checkvalidity() method of the element or its owner form is called.
...thanks!</p> javascript const form = document.getelementbyid('form'); const error = document.getelementbyid('error'); const city = document.getelementbyid('city'); const thanks = document.getelementbyid('thanks'); city.oninvalid = invalid; form.onsubmit = submit; function invalid(event) { error.removeattribute('hidden'); } function submit(event) { form.setattribute('hidden', ''); thanks.removeattribute('hidden'); // for this example, don't ...
GlobalEventHandlers.onmouseover - Web APIs
Web › API › GlobalEventHandlers › onmouseover
the mouseover event fires when the user moves the mouse over a particular element.
... syntax element.onmouseover = function; example this example adds an onmouseover and an onmouseout event to a paragraph.
... try moving your mouse over and out of the element.
GlobalEventHandlers.onpointercancel - Web APIs
Web › API › GlobalEventHandlers › onpointercancel
syntax targetelement.onpointercancel = cancelhandler; var cancelhandler = targetelement.onpointercancel; value cancelhandler the pointercancel event handler for element targetelement.
... example this example shows two ways to use onpointercancel to handle an element's pointercancel events.
... <html> <script> function cancelhandler(ev) { // process the pointercancel event } function init() { var el = document.getelementbyid('target1'); el.onpointercancel = cancelhandler; } </script> <body onload="init();"> <div id="target1"> touch me ...
GlobalEventHandlers.onpointerenter - Web APIs
Web › API › GlobalEventHandlers › onpointerenter
syntax targetelement.onpointerenter = enterhandler; var enterhandler = targetelement.onpointerenter; value enterhandler the pointerenter event handler for element targetelement.
... example this example shows two ways to use onpointerenter to set an element's pointerenter event handler.
... <html> <script> function enterhandler(ev) { // process the pointerenter event } function init() { let el = document.getelementbyid('target1'); el.onpointerenter = enterhandler; } </script> <body onload="init();"> <div id="target1"> touch me ...
GlobalEventHandlers.onpointerleave - Web APIs
Web › API › GlobalEventHandlers › onpointerleave
the global event handler for the pointerleave event, which is delivered to a node when the pointer (mouse cursor, fingertip, etc.) exits its hit test area (for example, if the cursor exits an element or window's content area).
... example this example shows two ways to use onpointerleave to set an element's pointerleave event handler.
... <html> <script> function leavehandler(ev) { // process the pointerleave event } function init() { var el=document.getelementbyid("target1"); el.onpointerleave = leavehandler; } </script> <body onload="init();"> <div id="target1"> touch me ...
GlobalEventHandlers.onpointermove - Web APIs
Web › API › GlobalEventHandlers › onpointermove
syntax targetelement.onpointermove = movehandler; var movehandler = targetelement.onpointermove; value movehandler the pointermove event handler for element targetelement.
... example this example shows two ways to use onpointermove to set an element's pointermove event handler.
... <html> <script> function movehandler(ev) { // process the pointermove event } function init() { let el=document.getelementbyid('target1'); el.onpointermove = movehandler; } </script> <body onload="init();"> <div id="target1"> touch me ...
GlobalEventHandlers.onpointerout - Web APIs
Web › API › GlobalEventHandlers › onpointerout
syntax targetelement.onpointerout = outhandler; var outhandler = targetelement.onpointerout; value outhandler the pointerout event handler for element targetelement.
... example this example shows two ways to use onpointerout to set an element's pointerout event handler.
... <html> <script> function outhandler(ev) { // process the pointerout event } function init() { let el=document.getelementbyid('target1'); el.onpointerout = outhandler; } </script> <body onload="init();"> <div id="target1"> touch me ...
GlobalEventHandlers.onpointerover - Web APIs
Web › API › GlobalEventHandlers › onpointerover
syntax targetelement.onpointerover = overhandler; var overhandler = targetelement.onpointerover; value overhandler the pointerover event handler for element targetelement.
... example this example shows two ways to use onpointerover to set an element's pointerover event handler.
... <html> <script> function overhandler(ev) { // process the pointerover event } function init() { let el = document.getelementbyid('target1'); el.onpointerover = overhandler; } </script> <body onload="init();"> <div id="target1"> touch me ...
GlobalEventHandlers.onpointerup - Web APIs
Web › API › GlobalEventHandlers › onpointerup
syntax targetelement.onpointerup = uphandler; var uphandler = targetelement.onpointerup; value uphandler the pointerup event handler for element targetelement.
... example this example shows two ways to use onpointerup to set an element's pointerup event handler.
... <html> <script> function uphandler(ev) { // process the pointerup event } function init() { let el = document.getelementbyid('target1'); el.onpointerup = uphandler; } </script> <body onload="init();"> <div id="target1"> touch me ...
GlobalEventHandlers.onscroll - Web APIs
Web › API › GlobalEventHandlers › onscroll
the scroll event fires when the document view or an element has been scrolled, whether by the user, a web api, or the user agent.
... example this example monitors scrolling on a <textarea>, and logs the element's vertical scroll position accordingly.
... html <textarea>1 2 3 4 5 6 7 8 9</textarea> <p id="log"></p> css textarea { width: 4rem; height: 8rem; font-size: 3rem; } javascript const textarea = document.queryselector('textarea'); const log = document.getelementbyid('log'); textarea.onscroll = logscroll; function logscroll(e) { log.textcontent = `scroll position: ${e.target.scrolltop}`; } result specifications specification status comment html living standardthe definition of 'onscroll' in that specification.
GlobalEventHandlers.ontouchcancel - Web APIs
Web › API › GlobalEventHandlers › ontouchcancel
syntax var cancelhandler = someelement.ontouchcancel; return value cancelhandler the touchcancel event handler for element someelement.
... example this example shows two ways to use ontouchcancel to set an element's touchcancel event handler.
... <html> <script> function canceltouch(ev) { // process the event } function init() { let el = document.getelementbyid('target1'); el.ontouchcancel = canceltouch; } </script> <body onload="init();"> <div id="target1"> touch me ...
GlobalEventHandlers.ontouchend - Web APIs
Web › API › GlobalEventHandlers › ontouchend
syntax var endhandler = targetelement.ontouchend; return value endhandler the touchend event handler for element targetelement.
... example this example shows two ways to use ontouchend to set an element's touchend event handler.
... <html> <script> function endtouch(ev) { // process the event } function init() { var el=document.getelementbyid("target1"); el.ontouchend = endtouch; } </script> <body onload="init();"> <div id="target1"> touch me ...
GlobalEventHandlers.ontouchmove - Web APIs
Web › API › GlobalEventHandlers › ontouchmove
syntax var movehandler = someelement.ontouchmove; return value movehandler the touchmove event handler for element someelement.
... example this example shows two ways to use ontouchmove to set an element's touchmove event handler.
... <html> <head> <script> function movetouch(ev) { // process the event } function init() { var el=document.getelementbyid("target1"); el.ontouchmove = movetouch; } </script> </head> <body onload="init();"> <div id="target1"> touch me ...
GlobalEventHandlers.ontouchstart - Web APIs
Web › API › GlobalEventHandlers › ontouchstart
syntax var starthandler = someelement.ontouchstart; return value starthandler the touchstart event handler for element someelement.
... example this example shows two ways to use ontouchstart to set an element's touchstart event handler.
... <html> <script> function starttouch(ev) { // process the event } function init() { let el = document.getelementbyid('target1'); el.ontouchstart = starttouch; } </script> <body onload="init();"> <div id="target1"> touch me ...
HTMLCollection.item - Web APIs
Web › API › HTMLCollection › item
syntax var element = htmlcollection.item(index) parameters index the position of the node to be returned.
... elements appear in an htmlcollection in the same order in which they appear in the document's source.
... usage notes the item() method returns a numbered element from an htmlcollection.
accessKeyLabel - Web APIs
Web › API › HTMLElement › accessKeyLabel
the htmlelement.accesskeylabel read-only property returns a string that represents the element's assigned access key (if any); otherwise it returns an empty string.
... syntax label = element.accesskeylabel example javascript var node = document.getelementbyid('btn1'); if (node.accesskeylabel) { node.title += ' [' + node.accesskeylabel + ']'; } else { node.title += ' [' + node.accesskey + ']'; } node.onclick = function () { var p = document.createelement('p'); p.textcontent = 'clicked!'; node.parentnode.appendchild(p); }; html <button accesskey="h" title="caption" id="btn1">hover me</button> result specifications specification status comment html living standardthe definition of 'htmlelement.accesskeylabel' in that specification.
... html5the definition of 'htmlelement.accesskeylabel' in that specification.
HTMLFormControlsCollection.namedItem() - Web APIs
Web › API › HTMLFormControlsCollection › namedItem
the htmlformcontrolscollection.nameditem() method returns the radionodelist or the element in the collection whose name or id match the specified name, or null if no node matches.
... syntax var item = collection.nameditem(str); var item = collection[str]; parameters str is a domstring return value item is a radionodelist , element, or null.
... example html <form> <input id="my-form-control" type="textarea"> </form> javascript // returns the htmlinputelement representing #my-form-control elem1 = document.forms[0]['my-form-control']; specifications specification status comment html living standardthe definition of 'htmlformcontrolscollection.nameditem()' in that specification.
HTMLFormControlsCollection - Web APIs
Web › API › HTMLFormControlsCollection
the htmlformcontrolscollection interface represents a collection of html form control elements.
... it represents the lists returned by the htmlformelement interface's elements property and the htmlfieldsetelement interface's elements property.
... htmlformcontrolscollection.nameditem() returns the radionodelist or the element in the collection whose name or id matches the specified name, or null if no nodes match.
msSetVideoRectangle - Web APIs
Web › API › HTMLVideoElement › msSetVideoRectangle
the htmlvideoelement.mssetvideorectangle() method sets the dimensions of a sub-rectangle within a video.
... syntax htmlvideoelement.mssetvideorectangle(); parameters left a number representing left-side position.
... example htmlvideoelement.mssetvideorectangle(left: 2, top: 0, right: 4, bottom: 4); see also htmlvideoelement microsoft api extensions ...
Ajax navigation example - Web APIs
Web › API › History API › Example
to see how it works, please create the following files (or git clone https://github.com/giabao/mdn-ajax-nav-example.git ): note: for fully integrating the <form> elements within this mechanism, please take a look at the paragraph submitting forms and uploading files.
...sloading) { return; } oreq.abort(); closereq(); } function ajaxerror () { alert("unknown error."); } function ajaxload () { var vmsg, nstatus = this.status; switch (nstatus) { case 200: vmsg = json.parse(this.responsetext); document.title = opageinfo.title = vmsg.page; document.getelementbyid(stargetid).innerhtml = vmsg.content; if (bupdateurl) { history.pushstate(opageinfo, opageinfo.title, opageinfo.url); bupdateurl = false; } break; default: vmsg = nstatus + ": " + (ohttpstatus[nstatus] || "unknown"); switch (math.floor(nstatus / 100)) { ...
...nlen; document.links[nidx++].onclick = processlink); } const /* customizable constants */ stargetid = "ajax-content", sviewkey = "view_as", sajaxclass = "ajax-nav", /* not customizable constants */ rsearch = /\?.*$/, rhost = /^[^\?]*\?*&*/, rview = new regexp("&" + sviewkey + "\\=[^&]*|&*$", "i"), rendqstmark = /\?$/, oloadingbox = document.createelement("div"), ocover = document.createelement("div"), oloadingimg = new image(), opageinfo = { title: null, url: location.href }, ohttpstatus = /* http://www.iana.org/assignments/http-status-codes/http-status-codes.xml */ { 100: "continue", 101: "switching protocols", 102: "processing", 200: "ok", 201: "...
KeyboardEvent.code - Web APIs
Web › API › KeyboardEvent › code
keys on the keyboard to see what the keyboardevent's key and code values are for each one.</p> <div id="output"> </div> css #output { font-family: arial, helvetica, sans-serif; border: 1px solid black; } javascript window.addeventlistener("keydown", function(event) { let str = "keyboardevent: key='" + event.key + "' | code='" + event.code + "'"; let el = document.createelement("span"); el.innerhtml = str + "<br/>"; document.getelementbyid("output").appendchild(el); }, true); try it out to ensure that keystrokes go to the sample, click in the output box below before pressing keys.
...finally, spaceship is set to refer to the element with the id "spaceship", which is the svg polygon representing the ship the player controls.
... let shipsize = { width: 30, height: 30 }; let position = { x: 200, y: 200 }; let moverate = 9; let turnrate = 5; let angle = 0; let spaceship = document.getelementbyid("spaceship"); next comes the function updateposition().
KeyboardLayoutMap.forEach() - Web APIs
Web › API › KeyboardLayoutMap › forEach
the foreach() method of the keyboardlayoutmap interface executes a provided function once for each element of the map.
... syntax keyboardlayoutmap.foreach(function callback(currentvalue[, index[, array]]) { //your iterator }[, thisarg]); parameters callback the function to execute for each element, taking three arguments: currentvalue the value of the current element being processed.
... index optional the index of the current element being processed.
MediaDevices.ondevicechange - Web APIs
Web › API › MediaDevices › ondevicechange
let videoelement = document.getelementbyid("video"); let logelement = document.getelementbyid("log"); function log(msg) { logelement.innerhtml += msg + "<br>"; } document.getelementbyid("startbutton").addeventlistener("click", function() { navigator.mediadevices.getusermedia({ video: { width: 160, height: 120, framerate: 30 }, audio: { samplerate: 44100, samplesize:...
... 16, volume: 0.25 } }).then(stream => { videoelement.srcobject = stream; updatedevicelist(); }) .catch(err => log(err.name + ": " + err.message)); }, false); we set up global variables that contain references to the <ul> elements that are used to list the audio and video devices: let audiolist = document.getelementbyid("audiolist"); let videolist = document.getelementbyid("videolist"); getting and drawing the device list now let's take a look at updatedevicelist() itself.
... function updatedevicelist() { navigator.mediadevices.enumeratedevices() .then(function(devices) { audiolist.innerhtml = ""; videolist.innerhtml = ""; devices.foreach(function(device) { let elem = document.createelement("li"); let [kind, type, direction] = device.kind.match(/(\w+)(input|output)/i); elem.innerhtml = "<strong>" + device.label + "</strong> (" + direction + ")"; if (type === "audio") { audiolist.appendchild(elem); } else if (type === "video") { videolist.appendchild(elem); } }); }); } updatedevicelist() consists entirely of a call to the function...
MediaError.code - Web APIs
Web › API › MediaError › code
the read-only property mediaerror.code returns a numeric value which represents the kind of error that occurred on a media element.
... example this example creates a <video> element, establishes an error handler for it, and then sets the element's src attribute to the video resource to present in the element.
... the error handler simply outputs a message var obj = document.createelement('video'); obj.onerror = function() {console.log("error with media: " + obj.error.code);} obj.src="https://example.com/blahblah.mp4"; specifications specification status comment html living standardthe definition of 'mediaerror.code' in that specification.
msExtendedCode - Web APIs
Web › API › MediaError › msExtendedCode
in the event of an error, the media element's error event will be fired.
... the element's error property will then contain an msextendedcode read-only property with platform-specific error code information.
... example var video1 = object.getelementbyid("video1"); video1.addeventlistener('error', function () { var error = video1.error.msextendedcode; //...
MediaSource.readyState - Web APIs
Web › API › MediaSource › readyState
the three possible values are: closed: the source is not currently attached to a media element.
... open: the source is attached to a media element and ready to receive sourcebuffer objects.
... ended: the source is attached to a media element but the stream has been ended via a call to mediasource.endofstream().
MediaSource.setLiveSeekableRange() - Web APIs
Web › API › MediaSource › setLiveSeekableRange
the setliveseekablerange() method of the mediasource interface sets the range that the user can seek to in the media element.
...if the duration of the media source is positive infinity, then the timeranges object returned by the htmlmediaelement.seekable property will have a start timestamp no greater than this value.
...if the duration of the media source is positive infinity, then the timeranges object returned by the htmlmediaelement.seekable property will have an end timestamp no less than this value.
MediaStreamConstraints.audio - Web APIs
Web › API › MediaStreamConstraints › audio
div id="log"></div> css content body { font: 14px "open sans", "arial", sans-serif; } audio { margin-top: 20px; border: 1px solid black; width: 160px; } .button { cursor: pointer; width: 160px; border: 1px solid black; font-size: 16px; text-align: center; padding-top: 2px; padding-bottom: 4px; color: white; background-color: darkgreen; } javascript content let audioelement = document.getelementbyid("audio"); let logelement = document.getelementbyid("log"); function log(msg) { logelement.innerhtml += msg + "<br>"; } document.getelementbyid("startbutton").addeventlistener("click", function() { navigator.mediadevices.getusermedia({ audio: true }).then(stream => audioelement.srcobject = stream) .catch(err => log(err.name + ": " + err.message)); }, fals...
...e); here we see an event handler for a click event which uses getusermedia() to obtain an audio-only stream with no specific constraints, then attaches the resulting stream to an <audio> element once the stream is returned.
...div id="log"></div> css content body { font: 14px "open sans", "arial", sans-serif; } audio { margin-top: 20px; border: 1px solid black; width: 160px; } .button { cursor: pointer; width: 160px; border: 1px solid black; font-size: 16px; text-align: center; padding-top: 2px; padding-bottom: 4px; color: white; background-color: darkgreen; } javascript content let audioelement = document.getelementbyid("audio"); let logelement = document.getelementbyid("log"); function log(msg) { logelement.innerhtml += msg + "<br>"; } document.getelementbyid("startbutton").addeventlistener("click", function() { navigator.mediadevices.getusermedia({ audio: { samplesize: 8, echocancellation: true } }).then(stream => audioelement.srcobject = stream) .catc...
MediaStreamConstraints.video - Web APIs
Web › API › MediaStreamConstraints › video
y></video><br> <div id="log"></div> css content body { font: 14px "open sans", "arial", sans-serif; } video { margin-top: 20px; border: 1px solid black; } .button { cursor: pointer; width: 160px; border: 1px solid black; font-size: 16px; text-align: center; padding-top: 2px; padding-bottom: 4px; color: white; background-color: darkgreen; } javascript content let videoelement = document.getelementbyid("video"); let logelement = document.getelementbyid("log"); function log(msg) { logelement.innerhtml += msg + "<br>"; } document.getelementbyid("startbutton").addeventlistener("click", function() { navigator.mediadevices.getusermedia({ video: true }).then(stream => videoelement.srcobject = stream) .catch(err => log(err.name + ": " + err.message)); }, fa...
...lse); here we see an event handler for a click event which uses getusermedia() to obtain a video-only stream with no specific constraints, then attaches the resulting stream to a <video> element once the stream is returned.
...y></video><br> <div id="log"></div> css content body { font: 14px "open sans", "arial", sans-serif; } video { margin-top: 20px; border: 1px solid black; } .button { cursor: pointer; width: 160px; border: 1px solid black; font-size: 16px; text-align: center; padding-top: 2px; padding-bottom: 4px; color: white; background-color: darkgreen; } javascript content let videoelement = document.getelementbyid("video"); let logelement = document.getelementbyid("log"); function log(msg) { logelement.innerhtml += msg + "<br>"; } document.getelementbyid("startbutton").addeventlistener("click", function() { navigator.mediadevices.getusermedia({ video: { width: 160, height: 120, framerate: 15 } }).then(stream => videoelement.srcobject = ...
Media Session API - Web APIs
Web › API › Media Session API
the mediasession interface lets users control playback of media through user-agent defined interface elements.
... interaction with these elements even trigger handlers in the web page, playing the media.
...*/ }); } some user agents disable autoplay for media elements on mobile devices and require a user gesture to start media.
MouseEvent.pageX - Web APIs
Web › API › MouseEvent › pageX
javascript var box = document.queryselector(".box"); var pagex = document.getelementbyid("x"); var pagey = document.getelementbyid("y"); function updatedisplay(event) { pagex.innertext = event.pagex; pagey.innertext = event.pagey; } box.addeventlistener("mousemove", updatedisplay, false); box.addeventlistener("mouseenter", updatedisplay, false); box.addeventlistener("mouseleave", updatedisplay, false); the javascript code uses addeventlistener() to register the function up...
... updatedisplay() simply replaces the contents of the <span> elements meant to contain the x and y coordinates with the values of pagex and pagey.
...it has two <span> elements, one with the id "x" and one with the id "y".
MutationEvent - Web APIs
Web › API › MutationEvent
domelementnamechanged and domattributenamechanged are not supported in firefox (as of version 11), and probably in other browsers as well.
... mutation events list the following is a list of all mutation events, as defined in dom level 3 events specification: domattrmodified domattributenamechanged domcharacterdatamodified domelementnamechanged domnodeinserted domnodeinsertedintodocument domnoderemoved domnoderemovedfromdocument domsubtreemodified usage you can register a listener for mutation events using eventtarget.addeventlistener() as follows: element.addeventlistener("domnodeinserted", function (event) { // ...
... }, false); the event object is passed to the listener in a mutationevent (see its definition in the specification) for most events, and mutationnameevent for domattributenamechanged and domelementnamechanged.
MutationObserver.observe() - Web APIs
Web › API › MutationObserver › observe
syntax mutationobserver.observe(target, options) parameters target a dom node (which may be an element) within the dom tree to watch for changes, or to be the root of a subtree of nodes to be watched.
... example in this example, we demonstrate how to call the method observe() on an instance of mutationobserver, once it has been set up, passing it a target element and a mutationobserverinit options object.
... // identify an element to observe const elementtoobserve = document.queryselector("#targetelementid"); // create a new instance of `mutationobserver` named `observer`, // passing it a callback function const observer = new mutationobserver(function() { console.log('callback that runs when observer is triggered'); }); // call `observe()` on that mutationobserver instance, // passing it the element to observe, and the options object observer.observe(elementtoobserve, {subtree: true, childlist: true}); specifications specification status comment domthe definition of 'mutationobserver.observe()' in that specification.
Node.appendChild() - Web APIs
Web › API › Node › appendChild
syntax element.appendchild(achild) parameters achild the node to append to the given parent node (commonly an element).
... notes chaining may not work as expected, due to appendchild() returning the child element: let ablock = document.createelement('block').appendchild( document.createelement('b') ); sets ablock to <b></b> only, which is probably not what you want.
... example // create a new paragraph element, and append it to the end of the document body let p = document.createelement("p"); document.body.appendchild(p); specifications specification status comment domthe definition of 'node.appendchild()' in that specification.
Node.isSupported() - Web APIs
Web › API › Node › isSupported
syntax boolvalue = element.issupported(feature, version) parameters feature is a domstring containing the name of the feature to test.
... example <div id="doc"> </div> <script> // get an element and check to see if its supports the dom2 html module.
... var main = document.getelementbyid('doc'); var output = main.issupported('html', '2.0'); </script> specifications specification status comment document object model (dom) level 3 core specificationthe definition of 'node.issupported()' in that specification.
Node.lastChild - Web APIs
Web › API › Node › lastChild
if its parent is an element, then the child is generally an element node, a text node, or a comment node.
... it returns null if there are no child elements.
... syntax var childnode = node.lastchild; example var tr = document.getelementbyid("row1"); var corner_td = tr.lastchild; specifications specification status comment domthe definition of 'node.lastchild' in that specification.
Node.setUserData() - Web APIs
Web › API › Node › setUserData
the node.setuserdata() method allows a user to attach (or remove) data to an element, without needing to modify the dom.
...htmlelement.dataset or weakmap can be used instead.
... example var d = document.implementation.createdocument('', 'test', null); d.documentelement.setuserdata('key', 15, {handle:function (o, k, d, s, ds) {console.log(o+'::'+k+'::'+d+'::'+s+'::'+ds)}}); // 2::key::15::[object element]::[object element] console.log(d.documentelement.getuserdata('key')); // 15 var e = document.importnode(d.documentelement, true); // causes handler to be called console.log(e.getuserdata('key')); // null since user data is not copied specifications s...
NodeList - Web APIs
Web › API › NodeList
for example, node.childnodes is live: const parent = document.getelementbyid('parent'); let child_nodes = parent.childnodes; console.log(child_nodes.length); // let's assume "2" parent.appendchild(document.createelement('div')); console.log(child_nodes.length); // outputs "3" static nodelists in other cases, the nodelist is static, where any changes in the dom does not affect the content of the collection.
...(in this case, the keys are numbers starting from 0 and the values are nodes.) nodelist.foreach() executes a provided function once per nodelist element, passing the element as an argument to the function.
... example it's possible to loop over the items in a nodelist using a for loop: for (let i = 0; i < mynodelist.length; i++) { let item = mynodelist[i]; } don't use for...in to enumerate the items in nodelists, since they will also enumerate its length and item properties and cause errors if your script assumes it only has to deal with element objects.
OVR_multiview2 - Web APIs
Web › API › OVR multiview2
methods framebuffertexturemultiviewovr() simultaneously renders to multiple elements of a 2d texture array.
... const gl = document.createelement('canvas').getcontext( 'webgl2', { antialias: false } ); const ext = gl.getextension('ovr_multiview2'); const fb = gl.createframebuffer(); gl.bindframebuffer(gl.draw_framebuffer, fb); const colortex = gl.createtexture(); gl.bindtexture(gl.texture_2d_array, colortex); gl.texstorage3d(gl.texture_2d_array, 1, gl.rgba8, 512, 512, 2); ext.framebuffertexturemultiviewovr(gl.draw_framebuffer, gl.color_attachment0, colortex, 0, 0, 2); const depthstenciltex = gl.createtexture(); gl.bindtexture(gl.texture_2d_array, depthstenciltex); gl.texstorage3d(gl.texture_2d_array, 1, gl.depth32f_stencil8, 512, 512, 2); ext.framebuffertexturemultiviewovr(gl.draw_frameb...
...uffer, gl.depth_stencil_attachment, depthstenciltex, 0, 0, 2); gl.drawelements(...); // draw will be broadcasted to the layers of colortex and depthstenciltex.
Page Visibility API - Web APIs
Web › API › Page Visibility API
dden !== "undefined") { // opera 12.10 and firefox 18 and later support hidden = "hidden"; visibilitychange = "visibilitychange"; } else if (typeof document.mshidden !== "undefined") { hidden = "mshidden"; visibilitychange = "msvisibilitychange"; } else if (typeof document.webkithidden !== "undefined") { hidden = "webkithidden"; visibilitychange = "webkitvisibilitychange"; } var videoelement = document.getelementbyid("videoelement"); // if the page is hidden, pause the video; // if the page is shown, play the video function handlevisibilitychange() { if (document[hidden]) { videoelement.pause(); } else { videoelement.play(); } } // warn if the browser doesn't support addeventlistener or the page visibility api if (typeof document.addeventlistener === "undefined" || hi...
... // this shows the paused videoelement.addeventlistener("pause", function(){ document.title = 'paused'; }, false); // when the video plays, set the title.
... videoelement.addeventlistener("play", function(){ document.title = 'playing'; }, false); } properties added to the document interface the page visibility api adds the following properties to the document interface: document.hidden read only returns true if the page is in a state considered to be hidden to the user, and false otherwise.
ParentNode.append() - Web APIs
Web › API › ParentNode › append
examples appending an element let parent = document.createelement("div") let p = document.createelement("p") parent.append(p) console.log(parent.childnodes) // nodelist [ <p> ] appending text let parent = document.createelement("div") parent.append("some text") console.log(parent.textcontent) // "some text" appending an element and text let parent = document.createelement("div") let p = document.createelement("p") par...
... let parent = document.createelement("div") with(parent) { append("foo") } // referenceerror: append is not defined polyfill you can polyfill the append() method in internet explorer 9 and higher with the following code: // source: https://github.com/jserz/js_piece/blob/master/dom/parentnode/append()/append().md (function (arr) { arr.foreach(function (item) { if (item.hasownproperty('append')) { return; } object.defineproperty(item, 'append', { configurable: true, enumerable: true, writable: true, value: function...
...argitem : document.createtextnode(string(argitem))); }); this.appendchild(docfrag); } }); }); })([element.prototype, document.prototype, documentfragment.prototype]); specification specification status comment domthe definition of 'parentnode.append()' in that specification.
Using the Payment Request API - Web APIs
Web › API › Payment Request API › Using the Payment Request API
const checkoutbutton = document.getelementbyid('checkout-button'); if (window.paymentrequest) { let request = new paymentrequest(buildsupportedpaymentmethodnames(), buildshoppingcartdetails()); checkoutbutton.addeventlistener('click', function() { request.show().then(function(paymentresponse) { // handle successful payment }).catch(function(error) { // handle cancelled or failed payment.
... const checkoutbutton = document.getelementbyid('checkout-button'); checkoutbutton.innertext = "loading..."; if (window.paymentrequest) { let request = new paymentrequest(buildsupportedpaymentmethodnames(), buildshoppingcartdetails()); request.canmakepayment().then(function(canmakeafastpayment) { if (canmakeafastpayment) { checkoutbutton.innertext = "fast checkout with w3c"; } else { checkoutbutton.innertext =...
... const additionaldetailscontainer = document.getelementbyid('additional-details-container'); additionaldetailscontainer.style.display = 'block'; window.scrollto(additionaldetailscontainer.getboundingclientrect().x, 0); }).catch(function(error) { // handle error.
RTCDataChannel: message event - Web APIs
Web › API › RTCDataChannel › message event
examples for a given rtcdatachannel, dc, created for a peer connection using its createdatachannel() method, this code sets up a handler for incoming messages and acts on them by adding the data contained within the message to the current document as a new <p> (paragraph) element.
... dc.addeventlistener("message", ev => { let newparagraph = document.createelement("p"); let textnode = document.createtextnode(event.data); newparagraph.appendchild(textnode); document.body.appendchild(newparagraph); }, false); lines 2-4 create the new paragraph element and add the message data to it as a new text node.
... you can also use an rtcdatachannel object's onmessage event handler property to set the event handler: dc.onmessage = ev => { let newparagraph = document.createelement("p"); let textnode = document.createtextnode(event.data); newparagraph.appendchild(textnode); document.body.appendchild(newparagraph); } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'the <code>message</code> event' in that specification.
RTCDataChannel.onmessage - Web APIs
Web › API › RTCDataChannel › onmessage
example this code snippet creates a peer connection, adds a data channel to it, and starts creating new <p> (paragraph) elements each time a message arrives, with the message's contents displayed inside it.
... the new elements are then attached to the end of the document.
... let pc = new rtcpeerconnection(); let dc = pc.createdatachannel(); dc.onmessage = function(event) { var el = document.createelement("p"); var txtnode = document.createtextnode(event.data); el.appendchild(txtnode); receivebox.appendchild(el); } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.onmessage' in that specification.
RTCPeerConnection.ontrack - Web APIs
Web › API › RTCPeerConnection › ontrack
example this example, taken from the code for the article signaling and video calling, connects the incoming track to the <video> element which will be used to display the incoming video.
... pc.ontrack = function(event) { document.getelementbyid("received_video").srcobject = event.streams[0]; document.getelementbyid("hangup-button").disabled = false; }; the first line of our ontrack event handler takes the first stream in the incoming track and sets the srcobject attribute to that.
... this connects that stream of video to the element so that it begins to be presented to the user.
RTCTrackEvent - Web APIs
Web › API › RTCTrackEvent
you can add a track event listener to be notified when the new track is available so that you can, for example, attach its media to a <video> element, using either rtcpeerconnection.addeventlistener() or the ontrack event handler property.
... example this simple example creates an event listener for the track event which sets the srcobject of the <video> element with the id videobox to the first stream in the list passed in the event's streams array.
... peerconnection.addeventlistener("track", e => { let videoelement = document.getelementbyid("videobox"); videoelement.srcobject = e.streams[0]; }, false); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtctrackevent' in that specification.
RadioNodeList.value - Web APIs
Web › API › RadioNodeList › value
if the underlying element collection contains radio buttons, the radionodelist.value property represents the checked radio button.
...on setting the value property, the first radio button input element whose value property is equal to the new value will be set to checked.
... syntax value = radionodelist.value; radionodelist.value = string; example html <form> <label><input type="radio" name="color" value="blue">blue</label> <label><input type="radio" name="color" value="red">red</label> </form> javascript // get the form const form = document.forms[0]; // get the form's radio buttons const radios = form.elements['color']; // choose the "red" option radios.value = 'red'; result specifications specification status comments html living standardthe definition of 'radionodelist.value' in that specification.
RadioNodeList - Web APIs
Web › API › RadioNodeList
the radionodelist interface represents a collection of radio elements in a <form> or a <fieldset> element.
... radionodelist.value if the underlying element collection contains radio buttons, the value property represents the checked radio button.
...on setting the value property, the first radio button input element whose value property is equal to the new value will be set to checked.
Range.getBoundingClientRect() - Web APIs
Web › API › Range › getBoundingClientRect
the range.getboundingclientrect() method returns a domrect object that bounds the contents of the range; this is a rectangle enclosing the union of the bounding rectangles for all the elements in the range.
...see element.getboundingclientrect() for details on the returned value.
...the bounding client rectangle contains everything selected in the range.</p> css #highlight { background: yellow; position: absolute; z-index: -1; } p { width: 200px; } javascript const range = document.createrange(); range.setstartbefore(document.getelementsbytagname('b').item(0), 0); range.setendafter(document.getelementsbytagname('b').item(1), 0); const clientrect = range.getboundingclientrect(); const highlight = document.getelementbyid('highlight'); highlight.style.left = `${clientrect.x}px`; highlight.style.top = `${clientrect.y}px`; highlight.style.width = `${clientrect.width}px`; highlight.style.height = `${clientrect.height}px`; result ...
ResizeObserverEntry.target - Web APIs
Web › API › ResizeObserverEntry › target
the target read-only property of the resizeobserverentry interface returns a reference to the element or svgelement that is being observed.
... syntax var element = resizeobserverentry.target; var svgelement = resizeobserverentry.target; value an element or svgelement representing the element being observed.
... to grab a reference to the observed element so we can update its border-radius value after each change, we make use of the target property of each entry — entry.target.style.borderradius.
Response.redirected - Web APIs
Web › API › Response › redirected
in the code below, a textual message is inserted into an element when a redirect occurred during the fetch operation.
... fetch("awesome-picture.jpg").then(function(response) { let elem = document.getelementbyid("warning-message-box"); if (response.redirected) { elem.innerhtml = "unexpected redirect"; } else { elem.innerhtml = ""; } return response.blob(); }).then(function(imageblob) { let imgobjecturl = url.createobjecturl(imageblob); document.getelementbyid("img-element-id").src = imgobjecturl; }); disallowing redirects because using redirected to manually filter out redirects can allow forgery of redirects, you should instead set the redirect mode to "error" in the init parameter when calling fetch(), like this: fetch("awesome-picture.jpg", { red...
...irect: "error" }).then(function(response) { return response.blob(); }).then(function(imageblob) { let imgobjecturl = url.createobjecturl(imageblob); document.getelementbyid("img-element-id").src = imgobjecturl; }); specifications specification status comment fetchthe definition of 'redirected' in that specification.
SVGAnimatedPathData - Web APIs
Web › API › SVGAnimatedPathData
svg animated path data interface the svganimatedpathdata interface supports elements which have a 'd' attribute which holds svg path data, and supports the ability to animate that attribute.
...gpathseglist animatednormalizedpathseglist svgpathseglist animatedpathseglist svgpathseglist normalizedpathseglist svgpathseglist pathseglist normative document svg 1.1 (2nd edition) properties this interface also inherits properties from its parent, svgpathelement.
... methods this interface does not provide any specific methods, but implements those of its parent, svgpathelement.
SVGFitToViewBox - Web APIs
Web › API › SVGFitToViewBox
svg fit to view box interface the svgfittoviewbox interface is used to reflect the viewbox and preserveaspectratio attributes, and is mixed in to other interfaces for elements that support these two attributes.
... normative document svg 1.1 (2nd edition) properties name type description preserveaspectratio svganimatedpreserveaspectratio corresponds to attribute preserveaspectratio on the given element.
... viewbox svganimatedrect corresponds to attribute viewbox on the given element.
SVGRect - Web APIs
Web › API › SVGRect
dth="75" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="38.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgrect</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties svgrect.x the exact effect of this coordinate depends on each element.
... svgrect.y the exact effect of this coordinate depends on each element.if the attribute is not specified, the effect is as if a value of 0 were specified.
...a value of zero disables rendering of the element svgrect.height this represents the height of the rectangle.a value that is negative results to an error.a value of zero disables rendering of the element.
SVGStylable - Web APIs
Web › API › SVGStylable
svg stylable interface the svgstylable interface is implemented on all objects corresponding to svg elements that can have style, class and presentation attributes specified on them.
...ods cssvalue getpresentationattribute(in domstring name) properties readonly svganimatedstring classname readonly cssstyledeclaration style normative document svg 1.1 (2nd edition) properties name type description classname svganimatedstring corresponds to attribute class on the given element.
... style cssstyledeclaration corresponds to attribute style on the given element.
ScrollToOptions - Web APIs
Web › API › ScrollToOptions
the scrolltooptions dictionary of the cssom view spec contains properties specifying where an element should be scrolled to, and whether the scrolling should be smooth.
... a scrolltooptions dictionary can be provided as a parameter for the following methods: window.scroll() window.scrollby() window.scrollto() element.scroll() element.scrollby() element.scrollto() properties scrolltooptions.top specifies the number of pixels along the y axis to scroll the window or element.
... scrolltooptions.left specifies the number of pixels along the x axis to scroll the window or element.
Using readable streams - Web APIs
Web › API › Streams API › Using readable streams
for example, our simple stream pump example goes on to enqueue each chunk in a new, custom readablestream (we will find more about this in the next section), then create a new response out of it, consume it as a blob, create an object url out of that blob using url.createobjecturl(), and then display it on screen in an <img> element, effectively creating a copy of the image we originally fetched.
... const stream = new readablestream({ start(controller) { interval = setinterval(() => { let string = randomchars(); // add the string to the stream controller.enqueue(string); // show it on the screen let listitem = document.createelement('li'); listitem.textcontent = string; list1.appendchild(listitem); }, 1000); button.addeventlistener('click', function() { clearinterval(interval); readstream(); controller.close(); }) }, pull(controller) { // we don't really need a pull in this example }, cancel() { // this is called if the reader cancels, // so we should stop generat...
... if (done) { console.log("stream complete"); para.textcontent = result; return; } charsreceived += value.length; const chunk = value; let listitem = document.createelement('li'); listitem.textcontent = 'read ' + charsreceived + ' characters so far.
StylePropertyMapReadOnly.forEach() - Web APIs
Web › API › StylePropertyMapReadOnly › forEach
the stylepropertymapreadonly.foreach() method executes a provided function once for each element of stylepropertymapreadonly.
... syntax stylepropertymapreadonly.foreach(function callback(currentvalue[, index[, array]]) { //your code }[, thisarg]); parameters callback the function to execute for each element, taking three arguments: currentvalue the value of the current element being processed.
... indexoptional the index of the current element being processed.
StylePropertyMapReadOnly.get() - Web APIs
Web › API › StylePropertyMapReadOnly › get
let's start by creating a link inside a paragraph in our html, and adding a definition list which we will populate with javascript: <p> <a href="https://example.com">link</a> </p> <dl id="regurgitation"></dl> we add a bit of css, including a custom property and an inhertable property: p { font-weight: bold; } a { --colour: red; color: var(--colour); } we use the element's computedstylemap() to return a stylepropertymapreadonly object.
... // get the element const myelement = document.queryselector('a'); // get the <dl> we'll be populating const styleslist = document.queryselector('#regurgitation'); // retrieve all computed styles with computedstylemap() const stylemap = myelement.computedstylemap(); // array of properties we're interested in const ofinterest = ['font-weight', 'border-left-color', 'color', '--colour']; // iterate thru our properties of interest for ( let i = 0; i < ofinterest.length; i++ ) { // properties const cssproperty = document.createelement('dt'); cssproperty.appendchild(document.createtextnode(ofinterest[i])); styleslist.appendchild(cssproperty); // values const cssv...
...alue = document.createelement('dd'); cssvalue.appendchild(document.createtextnode( stylemap.get(ofinterest[i]))); styleslist.appendchild(cssvalue); } specifications specification status comment css typed om level 1the definition of 'get()' in that specification.
TextTrack - Web APIs
Web › API › TextTrack
the texttrack interface—part of the api for handling webvtt (text tracks on media presentations)—describes and controls the text track associated with a particular <track> element.
...if the texttrack is associated with a <track> element, then the track's id matches the element's id.
...the default is disabled, unless the <track> element's default boolean attribute is specified, in which case the default mode is started.
TextTrackList.length - Web APIs
Web › API › TextTrackList › length
the read-only texttracklist property length returns the number of entries in the texttracklist, each of which is a texttrack representing one track in the media element.
... example this snippet gets the number of text tracks in the first media element found in the dom by queryselector().
... var mediaelem = document.queryselector("video, audio"); var numtexttracks = 0; if (mediaelem.texttracks) { numtexttracks = mediaelem.texttracks.length; } note that this sample checks to be sure htmlmediaelement.texttracks is defined, to avoid failing on browsers without support for texttrack.
TextTrackList.onaddtrack - Web APIs
Web › API › TextTrackList › onaddtrack
the texttracklist property onaddtrack is an event handler which is called when the addtrack event occurs, indicating that a new text track has been added to the media element whose text tracks the texttracklist represents.
... usage notes the addtrack event is called whenever a new track is added to the media element whose video tracks are represented by the texttracklist object.
... this happens when tracks are added to the element when the media is first attached to the element; one addtrack event will occur for each video track in the media resource.
TouchEvent.touches - Web APIs
Web › API › TouchEvent › touches
touches is a read-only touchlist listing all the touch objects for touch points that are currently in contact with the touch surface, regardless of whether or not they've changed or what their target element was at touchstart time.
... syntax var touches = touchevent.touches; return value touches a touchlist listing all the touch objects for touch points that are still in contact with the touch surface, regardless of whether or not they've changed or what their target element was at touchstart time.
... someelement.addeventlistener('touchstart', function(e) { // invoke the appropriate handler depending on the // number of touch points.
TransitionEvent() - Web APIs
Web › API › TransitionEvent › TransitionEvent
syntax transitionevent = new transitionevent(type, {propertyname: apropertyname, elapsedtime : afloat, pseudoelement: apseudoelementname}); arguments the transitionevent() constructor also inherits arguments from event().
... pseudoelement optional is a domstring, starting with "::", containing the name of the pseudo-element the animation runs on.
... if the animation doesn't run on a pseudo-element but on the element, an empty string: "".
UIEvent.pageY - Web APIs
Web › API › UIEvent › pageY
howcoords(event)"> <p>to display the mouse coordinates please click anywhere on the page.</p> <div id="d1"> <span>this is an un-positioned div so clicking it will return layerx/layery values almost the same as pagex/pagey values.</span> </div> <div id="d2"> <span>this is a positioned div so clicking it will return layerx/layery values that are relative to the top-left corner of this positioned element.
...this is a positioned div so clicking it will return layerx/layery values that are relative to the top-left corner of this positioned element.
... note the pagex\pagey properties still return the absolute position in the document, including page scrolling.</span> </div> <div id="d3"> <form name="form_coords"> parent element id: <input type="text" name="parentid" size="7" /><br /> pagex:<input type="text" name="pagexcoords" size="7" /> pagey:<input type="text" name="pageycoords" size="7" /><br /> layerx:<input type="text" name="layerxcoords" size="7" /> layery:<input type="text" name="layerycoords" size="7" /> </form> </div> </body> </html> specifications this property is not part of any specification.
VideoPlaybackQuality.corruptedVideoFrames - Web APIs
Web › API › VideoPlaybackQuality › corruptedVideoFrames
the videoplaybackquality interface's read-only corruptedvideoframes property the number of corrupted video frames that have been received since the <video> element was last loaded or reloaded.
... syntax corruptframefount = videoplaybackquality.corruptedvideoframes; value the number of corrupted video frames that have been received since the <video> element was last loaded or reloaded.
... var videoelem = document.getelementbyid("my_vid"); var quality = videoelem.getvideoplaybackquality(); if (quality.corruptedvideoframes/quality.totalvideoframes > 0.05) { downgradevideo(videoelem); } specifications specification status comment media playback qualitythe definition of 'videoplaybackquality: corruptedvideoframes' in that specification.
VideoPlaybackQuality.totalVideoFrames - Web APIs
Web › API › VideoPlaybackQuality › totalVideoFrames
syntax value = videoplaybackquality.totalvideoframes; value the total number of frames that the <video> element has displayed or dropped since the media was loaded into it.
... essentially, this is the number of frames the element would have presented had no problems occurred.
... var videoelem = document.getelementbyid("my_vid"); var quality = videoelem.getvideoplaybackquality(); if ((quality.corruptedvideoframes + quality.droppedvideoframes)/quality.totalvideoframes > 0.1) { lostframesthresholdexceeded(); } a similar algorithm might be used to attempt to switch to a lower-resolution video that requires less bandwidth, in order to avoid dropping frames.
VideoTrack - Web APIs
Web › API › VideoTrack
the videotrack interface represents a single video track from a <video> element.
... the most common use for accessing a videotrack object is to toggle its selected property in order to make it the active video track for its <video> element.
... usage notes to get a videotrack for a given media element, use the element's videotracks property, which returns a videotracklist object from which you can get the individual tracks contained in the media: var el = document.queryselector("video"); var tracks = el.videotracks; you can then access the media's individual tracks using either array syntax or functions such as foreach().
VideoTrackList.length - Web APIs
Web › API › VideoTrackList › length
the read-only videotracklist property length returns the number of entries in the videotracklist, each of which is a videotrack representing one video track in the media element.
... example this snippet gets the number of video tracks in the first <video> element found in the dom by queryselector().
... var videoelem = document.queryselector("video"); var numvideotracks = 0; if (videoelem.videotracks) { numvideotracks = videoelem.videotracks.length; } note that this sample checks to be sure htmlmediaelement.videotracks is defined, to avoid failing on browsers without support for videotrack.
VideoTrackList.onaddtrack - Web APIs
Web › API › VideoTrackList › onaddtrack
the videotracklist property onaddtrack is an event handler which is called when the addtrack event occurs, indicating that a new video track has been added to the media element whose video tracks the videotracklist represents.
... usage notes the addtrack event is called whenever a new track is added to the media element whose video tracks are represented by the videotracklist object.
... this happens when tracks are added to the element when the media is first attached to the element; one addtrack event will occur for each video track in the media resource.
WebGL2RenderingContext.getBufferSubData() - Web APIs
Web › API › WebGL2RenderingContext › getBufferSubData
gl.element_array_buffer: buffer used for element indices.
... srcoffset optional a gluint specifying the element index offset where to start reading the buffer.
... examples var buffer = gl.createbuffer(); gl.bindbuffer(gl.array_buffer, buffer); gl.bufferdata(gl.array_buffer, new float32array(vertices), gl.static_draw); var arrbuffer = new arraybuffer(vertices.length * float32array.bytes_per_element); gl.getbuffersubdata(gl.array_buffer, 0, arrbuffer); specifications specification status comment webgl 2.0the definition of 'getbuffersubdata' in that specification.
WebGLRenderingContext.bindBuffer() - Web APIs
Web › API › WebGLRenderingContext › bindBuffer
gl.element_array_buffer: buffer used for element indices.
... examples binding a buffer to a target var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var buffer = gl.createbuffer(); gl.bindbuffer(gl.array_buffer, buffer); getting current bindings to check the current buffer bindings, query the array_buffer_binding and element_array_buffer_binding constants.
... gl.getparameter(gl.array_buffer_binding); gl.getparameter(gl.element_array_buffer_binding); specifications specification status comment webgl 1.0the definition of 'bindbuffer' in that specification.
WebGLRenderingContext.bufferSubData() - Web APIs
Web › API › WebGLRenderingContext › bufferSubData
gl.element_array_buffer: buffer used for element indices.
... srcoffset a gluint specifying the element index offset where to start reading the buffer.
... examples using buffersubdata var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var buffer = gl.createbuffer(); gl.bindbuffer(gl.array_buffer, buffer); gl.bufferdata(gl.array_buffer, 1024, gl.static_draw); gl.buffersubdata(gl.array_buffer, 512, data); specifications specification status comment webgl 1.0the definition of 'buffersubdata' in that specification.
WebGLRenderingContext.commit() - Web APIs
Web › API › WebGLRenderingContext › commit
the webglrenderingcontext.commit() method pushes frames back to the original htmlcanvaselement, if the context is not directly fixed to a specific canvas.
... syntax void webglrenderingcontext.commit() examples var htmlcanvas = document.createelement('canvas'); var offscreen = htmlcanvas.transfercontroltooffscreen(); var gl = offscreen.getcontext('webgl'); // ...
... // push frames back to the original htmlcanvaselement gl.commit(); specifications specification status comment html living standardthe definition of 'the commit() method of the offscreencanvas object's rendering context' in that specification.
Basic scissoring - Web APIs
Web › API › WebGL API › By example › Basic scissoring
a pixel is a picture element (in practice, a point) on the screen, or a single element of the drawing buffer, that area in memory that holds your pixel data (such as rgba color components).
...in other cases, the fragments may be discarded altogether (so the pixel value is not updated), or it may interact with the already existing pixel value (such as when doing color blending for non-opaque elements in the scene).
... background-color : black; } window.addeventlistener("load", function setupwebgl (evt) { "use strict" window.removeeventlistener(evt.type, setupwebgl, false); var paragraph = document.queryselector("p"); var canvas = document.queryselector("canvas"); // the following two lines set the size (in css pixels) of // the drawing buffer to be identical to the size of the // canvas html element, as determined by css.
Boilerplate 1 - Web APIs
Web › API › WebGL API › By example › Boilerplate 1
specifically, the html has a <p> element that contains some descriptive text about the page and may also hold error messages; a <canvas> element; and optionally a <button>.
...basically, it gets the webgl rendering context from the canvas element, initializes the drawing buffer, clears it black, and returns the initialized context.
...]</p> <button>[ optional button element.
Detect WebGL - Web APIs
Web › API › WebGL API › By example › Detect WebGL
to that end we will try to obtain the webgl rendering context from a canvas element.
... button.addeventlistener("click", detectwebglcontext, false); function detectwebglcontext () { // create canvas element.
... var canvas = document.createelement("canvas"); // get webglrenderingcontext from canvas element.
Animating textures in WebGL - Web APIs
Web › API › WebGL API › Tutorial › Animating textures in WebGL
getting access to the video the first step is to create the <video> element that we'll use to retrieve the video frames: // will set to true when video can be copied to texture var copyvideo = false; function setupvideo(url) { const video = document.createelement('video'); var playing = false; var timeupdate = false; video.autoplay = true; video.muted = true; video.loop = true; // waiting for these 2 events ensures // there is data in the video vi...
...deo.addeventlistener('playing', function() { playing = true; checkready(); }, true); video.addeventlistener('timeupdate', function() { timeupdate = true; checkready(); }, true); video.src = url; video.play(); function checkready() { if (playing && timeupdate) { copyvideo = true; } } return video; } first we create a video element.
...it's nearly identical to the image onload function in the previous example — except when we call teximage2d(), instead of passing an image object, we pass in the <video> element.
WebGL model view projection - Web APIs
Web › API › WebGL API › WebGL model view projection
webglbox constructor the constructor looks like this: function webglbox() { // setup the canvas and webgl context this.canvas = document.getelementbyid('canvas'); this.canvas.width = window.innerwidth; this.canvas.height = window.innerheight; this.gl = mdn.createcontext(canvas); var gl = this.gl; // setup a webgl program, anything part of the mdn object is defined outside of this article this.webglprogram = mdn.createwebglprogramfromids(gl, 'vertex-shader', 'fragment-shader'); gl.useprogram(this.webglprogram); // save the ...
...for convenience, these shaders are stored in a <script> element that is brought into the program through the custom function mdn.createwebglprogramfromids().
...the function takes three parameters — the context to render the program in, the id of the <script> element containing the vertex shader, and the id of the <script> element containing the fragment shader.
WebGL: 2D and 3D graphics for the web - Web APIs
Web › API › WebGL API
webgl does so by introducing an api that closely conforms to opengl es 2.0 that can be used in html5 <canvas> elements.
... the <canvas> element is also used by the canvas api to do 2d graphics on web pages.
...bgltransformfeedback webgluniformlocation webglvertexarrayobject extensions angle_instanced_arrays ext_blend_minmax ext_color_buffer_float ext_color_buffer_half_float ext_disjoint_timer_query ext_float_blend ext_frag_depth ext_srgb ext_shader_texture_lod ext_texture_compression_bptc ext_texture_compression_rgtc ext_texture_filter_anisotropic khr_parallel_shader_compile oes_element_index_uint oes_fbo_render_mipmap oes_standard_derivatives oes_texture_float oes_texture_float_linear oes_texture_half_float oes_texture_half_float_linear oes_vertex_array_object ovr_multiview2 webgl_color_buffer_float webgl_compressed_texture_astc webgl_compressed_texture_atc webgl_compressed_texture_etc webgl_compressed_texture_etc1 webgl_compressed_texture_pvrtc webgl_compressed_...
Establishing a connection: The WebRTC perfect negotiation pattern - Web APIs
Web › API › WebRTC API › Perfect negotiation
const constraints = { audio: true, video: true }; const config = { iceservers: [{ urls: "stun:stun.mystunserver.tld" }] }; const selfvideo = document.queryselector("video.selfview"); const remotevideo = document.queryselector("video.remoteview"); const signaler = new signalingchannel(); const pc = new rtcpeerconnection(config); this code also gets the <video> elements using the classes "selfview" and "remoteview"; these will contain, respectively, the local user's self-view and the view of the incoming stream from the remote peer.
...then, finally, the media source for the self-view <video> element indicated by the selfvideo constant is set to the camera and microphone stream, allowing the local user to see what the other peer sees.
... if we already have video coming in from the remote peer (which we can see if the remote view's <video> element's srcobject property already has a value), we do nothing.
Web Audio API best practices - Web APIs
Web › API › Web Audio API › Best practices
when working with files, you are looking at either the grabbing the file from an htmlmediaelement (i.e.
... an <audio> or <video> element), or you're looking to fetch the file and decode it into a buffer.
... media elements have streaming support out of the box.
Migrating from webkitAudioContext - Web APIs
Web › API › Web Audio API › Migrating from webkitAudioContext
those values have since been changed to use the web idl based enumerated values, which should be familiar because they are similar to things like the the htmlinputelement property type.
... removal of mediaelementaudiosourcenode.mediaelement the mediaelement attribute of mediaelementaudiosourcenode has been removed.
... you can keep a reference to the media element used to create this node if you need to access it later.
Web Audio API - Web APIs
Web › API › Web Audio API
these could be either computed mathematically (such as oscillatornode), or they can be recordings from sound/video files (like audiobuffersourcenode and mediaelementaudiosourcenode) and audio streams (mediastreamaudiosourcenode).
...an html <audio> or <video> element), audio destination, intermediate processing module (e.g.
... mediaelementaudiosourcenode the mediaelementaudiosourcenode interface represents an audio source consisting of an html5 <audio> or <video> element.
Window: animationend event - Web APIs
Web › API › Window › animationend event
if the animation aborts before reaching completion, such as if the element is removed from the dom or the animation is removed from the element, the animationend event is not fired.
... bubbles yes cancelable no interface animationevent event handler property onanimationend the original target for this event is the element that had the animation applied.
...for full details on this event please see the page on htmlelement: animationend.
Window.getSelection() - Web APIs
Web › API › Window › getSelection
it is worth noting that currently getselection() doesn't work on the content of <textarea> and <input> elements in firefox, edge (legacy) and internet explorer.
... htmlinputelement.setselectionrange() or the selectionstart and selectionend properties could be used to work around this.
...document.activeelement returns the focused element.
Window: resize event - Web APIs
Web › API › Window › resize event
bubbles no cancelable no interface uievent event handler property onresize in some earlier browsers it was possible to register resize event handlers on any html element.
... it is still possible to set onresize attributes or use addeventlistener() to set a handler on any element.
... there is a proposal to allow all elements to be notified of resize changes.
XMLSerializer.serializeToString() - Web APIs
Web › API › XMLSerializer › serializeToString
the following types are also permitted as descendants of the root node, in addition to node and attr: documenttype document documentfragment element comment text processinginstruction attr if any other type is encountered, a typeerror exception is thrown.
... notes on the resulting xml there are some things worth noting about the xml output by serializetostring(): for xml serializations, element and attr nodes are always serialized with their namespaceuri intact.
... elements in the html namespace that have no child nodes (thereby representing empty tags) are serialized with both begin and end tags ("<someelement></someelement>") instead of using the empty-element tag ("<someelement/>").
Introduction - Web APIs
Web › API › XSLTProcessor › Introduction
css also has limited support for changing the position of an element.
... xsl (extensible stylesheet language) transformations are composed of two parts: xsl elements, which allow the transformation of an xml tree into another markup tree and xpath, a selection language for trees.
...this allows xslt to add, remove and reorganize elements from the original xml document and thus allows more fine-grain control of the resulting document's structure.
msGetRegionContent - Web APIs
Web › API › msGetRegionContent
syntax var retval = element.msgetregioncontent(); parameters retval [out, reval] type: msrangecollection the name of the property to enable.
...if an element is not a region, this method throws a domexception with the invalidaccesserror error code.
... this is only available to regions that are document elements and not to regions that are pseudo-elements.
ARIA live regions - Accessibility
Web › Accessibility › ARIA › ARIA Live Regions
including an aria-live attribute or a specialized live region role (such as role="alert") on the element you want to announce changes to works as long as you add the attribute before the changes occur — either in the original markup, or dynamically using javascript.
... <div id="clock" role="timer" aria-live="polite"></div> /* basic javascript to update the clock */ setinterval(function() { var now = new date(); document.getelementbyid('clock').innerhtml = "time: " + now.gethours() + ":" + ("0"+now.getminutes()).substr(-2); }, 60000); the first time the function executes, the entirety of the string that is added will be announced.
... a working example of a simple year control for better understanding: <div id="date-input"> <label>year: <input type="text" id="year" value="1990" onblur="change(event)"/> </label> </div> <div id="date-output" aria-live="polite"> the set year is: <span id="year-output">1990</span> </div> function change(event) { var yearout = document.getelementbyid("year-output"); switch (event.target.id) { case "year": yearout.innerhtml = event.target.value; break; default: return; } }; without aria-atomic="true" the screenreader announces only the changed value of year.
Using the aria-orientation attribute - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the aria-orientation attribute
the aria-orientation attribute is used to indicate whether an element is oriented horizontally or vertically.
... value vocabulary vertical the element is oriented vertically.
... horizontal (default) the element is oriented horizontally.
Using the article role - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the article role
the aria article role is similar to the html5 article element; however the article element should still be given the aria role of article, since not all assistive technologies support html5 yet.
... possible effects on user agents and assistive technology when the user navigates an element assigned the role of article, assistive technologies that typically intercept standard keyboard events should switch to document browsing mode, as opposed to passing keyboard events through to the web application.
... assistive technologies may provide a feature allowing the user to navigate the hierarchy of any nested article elements.
Using the presentation role - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the presentation role
the presentation role is used to remove semantic meaning from an element and any of its related child elements.
... for example, a table used for layout purposes could have the presentation role applied to the table element to remove any semantic meaning from the table element and any of its table related children elements, such as table headers and table data elements.
... non-table related elements should retain their semantic meaning, however.
ARIA Test Cases - Accessibility
Web › Accessibility › ARIA › ARIA Test Cases
10 - - - - voiceover (leopard) n/a n/a - fail window-eyes - - - - nvda - n/a - - zoom (leopard) pass n/a pass pass zoomtext - - - - orca - - - - img tiled image expected at behavior: screen readers should announce the image is a single graphic element along with its associated label, even though it is built from numerous sub-images.
... jaws 10 - - - - voiceover (leopard) n/a n/a - fail window-eyes - - - - nvda - n/a - - zoom (leopard) pass n/a pass pass zoomtext - - - - orca - - - - radiogroup and radiobutton radio example using css background images radio example using img element radio example using aria-activedescendent property dojo nightly build expected at behavior: on initial focus, the screen reader should announce the label of the radio group and the focused radio button, whether it is selected or not, and its position.
... n/a n/a jaws 10 - - - - voiceover (leopard) n/a n/a - fail window-eyes - - - - nvda - n/a - - zoom (leopard) pass n/a pass pass zoomtext - - - - orca - - - - separator (no examples yet) expected at behavior: (mz) the inclusion of this element should be controlled by the screen reader.
ARIA: search role - Accessibility
Web › Accessibility › ARIA › Roles › Search role
the search role is added to the container element that encompasses the items and objects that, as a whole, combine to create search functionality.
...while there is a input of type search, there is html element that defines a search landmark.
... best practices prefer html using the <form> element in conjunction with a declaration of role="search" will provide the largest amount of support.
Mobile accessibility checklist - Accessibility
Web › Accessibility › Mobile accessibility checklist
focus all activatable elements must be focusable: standard controls such as links, buttons, and form fields are focusable by default.
... text equivalents text equivalent must be provided for every non-strictly presentational non-text element within the app.
... all form controls must have labels (<label> elements) for the benefit of screen reader users.
-moz-outline-radius - CSS: Cascading Style Sheets
Web › CSS › -moz-outline-radius
in mozilla applications like firefox, the -moz-outline-radius css shorthand property can be used to give an element's outline rounded corners.
... formal definition initial valueas each of the properties of the shorthand:-moz-outline-radius-topleft: 0-moz-outline-radius-topright: 0-moz-outline-radius-bottomright: 0-moz-outline-radius-bottomleft: 0applies toall elementsinheritednopercentagesas each of the properties of the shorthand:-moz-outline-radius-topleft: refer to the corresponding dimension of the border box-moz-outline-radius-topright: refer to the corresponding dimension of the border box-moz-outline-radius-bottomright: refer to the corresponding dimension of the border box-moz-outline-radius-bottomleft: refer to the corresponding dimension of the bord...
... html <p>this element has a rounded outline!</p> css p { margin: 5px; border: 1px solid black; outline: dotted red; -moz-outline-radius: 12% 1em 25px; } result notes dotted or dashed radiused corners were rendered as solid until firefox 50, bug 382721 future versions of gecko/firefox may drop this property completely.
-webkit-border-before - CSS: Cascading Style Sheets
Web › CSS › -webkit-border-before
it maps to a physical border depending on the element's writing mode, directionality, and text orientation.
... it relates to -webkit-border-after, -webkit-border-start, and -webkit-border-end, which define the other borders of the element.
...of the properties of the shorthand:border-width: as each of the properties of the shorthand:border-top-width: mediumborder-right-width: mediumborder-bottom-width: mediumborder-left-width: mediumborder-style: as each of the properties of the shorthand:border-top-style: noneborder-right-style: noneborder-bottom-style: noneborder-left-style: nonecolor: varies from one browser to anotherapplies toall elementsinheritedyespercentagesas each of the properties of the shorthand:-webkit-border-before-width: logical-width of containing blockcomputed valueas each of the properties of the shorthand:border-width: as each of the properties of the shorthand:border-bottom-width: the absolute length or 0 if border-bottom-style is none or hiddenborder-left-width: the absolute length or 0 if border-left-style is non...
-webkit-mask-repeat-x - CSS: Cascading Style Sheets
Web › CSS › -webkit-mask-repeat-x
the remainder of the masked element's content is not displayed.
...the first and last images are pinned to either side of the element, and whitespace is distributed evenly between the images.
... formal definition initial valuerepeatapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax repeat | no-repeat | space | round examples using a repeating or non-repeating mask image .exampleone { -webkit-mask-image: url('mask.png'); -webkit-mask-repeat-x: repeat; } .exampletwo { -webkit-mask-image: url('mask.png'); -webkit-mask-repeat-x: no-repeat; } using multiple mask images you can specify a di...
-webkit-mask-repeat-y - CSS: Cascading Style Sheets
Web › CSS › -webkit-mask-repeat-y
the vertical remainder of the masked element's content is not displayed.
...the first and last images are pinned to the top and bottom edge of the element, and whitespace is distributed evenly between the images.
... formal definition initial valuerepeatapplies toall elementsinheritednocomputed valuefor <length> the absolute value, otherwise a percentageanimation typediscrete formal syntax repeat | no-repeat | space | round examples using a repeating or non-repeating mask image .exampleone { -webkit-mask-image: url('mask.png'); -webkit-mask-repeat-y: repeat; } .exampletwo { -webkit-mask-image: url('mask.png'); -webkit-mask-repeat-y: no-repeat; } using...
:-moz-first-node - CSS: Cascading Style Sheets
Web › CSS › :-moz-first-node
the :-moz-first-node css pseudo-class is a mozilla extension that represents any element that is the first child node of some other element.
... it differs from :first-child because it does not match a first-child element with (non-whitespace) text before it.
... note: any whitespace at the start of an element is ignored for the determination of :-moz-first-node.
:-moz-last-node - CSS: Cascading Style Sheets
Web › CSS › :-moz-last-node
the :-moz-last-node css pseudo-class is a mozilla extension that represents any element that is the last child node of some other element.
... it differs from :last-child because it does not match a last-child element with (non-whitespace) text after it.
... note: any whitespace at the end of an element is ignored for the determination of :-moz-last-node.
::-webkit-progress-value - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-progress-value
the ::-webkit-progress-value css pseudo-element represents the filled-in portion of the bar of a <progress> element.
... it is a child of the ::-webkit-progress-bar pseudo-element.
... note: in order to let ::-webkit-progress-value take effect, -webkit-appearance needs to be set to none on the <progress> element.
::-webkit-search-cancel-button - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-search-cancel-button
the ::-webkit-search-cancel-button css pseudo-element represents a button (the "cancel button") at the edge of an <input> of type="search" which clears away the current value of the <input> element.
... this button and pseudo-element are non-standard, supported only in webkit and blink, hence the vendor prefix.
... the clear button is only shown on non-empty search <input> elements.
::-webkit-search-results-button - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-search-results-button
the ::-webkit-search-results-button css pseudo-element represents a button (the "search results button") at the left edge of an <input> of type="search" which when clicked displays a menu which allows the user to choose from previous recent search queries.
... this button and pseudo-element are non-standard, supported only in webkit and blink, hence the vendor prefix.
... the search results button is only shown on search <input> elements that have a results attribute.
::cue-region - CSS: Cascading Style Sheets
Web › CSS › ::cue-region
the ::cue-region css pseudo-element matches webvtt cues within a selected element.
... syntax ::cue-region | ::cue-region( <selector> ) permitted properties rules whose selectors include this element may only use the following css properties: background background-attachment background-clip background-color background-image background-origin background-position background-repeat background-size color font font-family font-size font-stretch font-style font-variant font-weight line-height opacity outline outline-color outline-style outline-width ruby-position text-com...
...bine-upright text-decoration text-decoration-color text-decoration-line text-decoration-style text-decoration-thickness text-shadow visibility white-space specifications specification status comment webvtt: the web video text tracks formatthe definition of 'the ::cue-region pseudo-element' in that specification.
::marker - CSS: Cascading Style Sheets
Web › CSS › ::marker
the ::marker css pseudo-element selects the marker box of a list item, which typically contains a bullet or number.
... it works on any element or pseudo-element set to display: list-item, such as the <li> and <summary> elements.
... syntax ::marker examples html <ul> <li>peaches</li> <li>apples</li> <li>plums</li> </ul> css ul li::marker { color: red; font-size: 1.5em; } result specifications specification status comment css pseudo-elements level 4the definition of '::marker' in that specification.
::part() - CSS: Cascading Style Sheets
Web › CSS › ::part
the ::part css pseudo-element represents any element within a shadow tree that has a matching part attribute.
... custom-element::part(foo) { /* styles to apply to the `foo` part */ } syntax ::part( <ident>+ ) examples html <template id="tabbed-custom-element"> <style type="text/css"> *, ::before, ::after { box-sizing: border-box; padding: 1rem; } :host { display: flex; } </style> <div part="tab active">tab 1</div> <div part="tab">tab 2</div> <div part="tab">tab 3</div> </template> <tabbed-custom-element></tabbed-custom-element> css tabbed-custom-element::part(tab) { color: #0c0c0dcc; border-bottom: transparent solid 2px; } tabbed-custom-element::part(tab):hover { background-color: #0c0c0d19; border-color: #0c0c0d33; } tabbed-custom-element::part(tab):hover:active { background-color: #0c0c0d33; } tabbed-custom-element::part(tab):focus { box-shadow: 0 0 0 1px #0a84ff inse...
...t, 0 0 0 1px #0a84ff, 0 0 0 4px rgba(10, 132, 255, 0.3); } tabbed-custom-element::part(active) { color: #0060df; border-color: #0a84ff !important; } javascript let template = document.queryselector("#tabbed-custom-element"); globalthis.customelements.define(template.id, class extends htmlelement { constructor() { super(); this.attachshadow({ mode: "open" }); this.shadowroot.appendchild(template.content); } }); result specifications specification status comment shadow partsthe definition of '::part' in that specification.
:first-child - CSS: Cascading Style Sheets
Web › CSS › :first-child
the :first-child css pseudo-class represents the first element among a group of sibling elements.
... /* selects any <p> that is the first element among its siblings */ p:first-child { color: lime; } note: as originally defined, the selected element had to have a parent.
... working draft matching elements are not required to have a parent.
:host - CSS: Cascading Style Sheets
Web › CSS › :host
the :host css pseudo-class selects the shadow host of the shadow dom containing the css it is used inside — in other words, this allows you to select a custom element from inside its shadow dom.
... in this example we have a simple custom element — <context-span> — that you can wrap around text: <h1>host selectors <a href="#"><context-span>example</context-span></a></h1> inside the element's constructor, we create style and span elements, fill the span with the content of the custom element, and fill the style element with some css rules: let style = document.createelement('style'); let span = document.createelement('span'); span.textcontent = this.textcontent; const shadowroot = this.attachshadow({mode: 'open'}); shadowroo...
... ':host-context(h1):after { content: " - no links in headers!" }' + ':host-context(article, aside) { color: gray; }' + ':host(.footer) { color : red; }' + ':host { background: rgba(0,0,0,0.1); padding: 2px 5px; }'; the :host { background: rgba(0,0,0,0.1); padding: 2px 5px; } rule styles all instances of the <context-span> element (the shadow host in this instance) in the document.
:indeterminate - CSS: Cascading Style Sheets
Web › CSS › :indeterminate
the :indeterminate css pseudo-class represents any form element whose state is indeterminate, such as checkboxes which have their html indeterminate attribute set to true, radio buttons which are members of a group in which all radio buttons are unchecked, and indeterminate <progress> elements.
... /* selects any <input> whose state is indeterminate */ input:indeterminate { background: lime; } elements targeted by this selector are: <input type="checkbox"> elements whose indeterminate property is set to true by javascript <input type="radio"> elements, when all radio buttons with the same name value in the form are unchecked <progress> elements in an indeterminate state syntax :indeterminate examples checkbox & radio button this example applies special styles to the labels associated with indeterminate form fields.
... html <div> <input type="checkbox" id="checkbox"> <label for="checkbox">this label starts out lime.</label> </div> <div> <input type="radio" id="radio"> <label for="radio">this label starts out lime.</label> </div> css input:indeterminate + label { background: lime; } javascript var inputs = document.getelementsbytagname("input"); for (var i = 0; i < inputs.length; i++) { inputs[i].indeterminate = true; } progress bar html <progress> css progress { margin: 4px; } progress:indeterminate { opacity: 0.5; background-color: lightgray; box-shadow: 0 0 2px 1px red; } result specifications specification status comment html living standardthe definition of ':indeterminate' in that specification.
:lang() - CSS: Cascading Style Sheets
Web › CSS › :lang
the :lang() css pseudo-class matches elements based on the language they are determined to be in.
... /* selects any <p> in english (en) */ p:lang(en) { quotes: '\201c' '\201d' '\2018' '\2019'; } note: in html, the language is determined by a combination of the lang attribute, the <meta> element, and possibly by information from the protocol (such as http headers).
... examples in this example, the :lang() pseudo-class is used to match the parents of quote elements (<q>) using child combinators.
:last-child - CSS: Cascading Style Sheets
Web › CSS › :last-child
the :last-child css pseudo-class represents the last element among a group of sibling elements.
... /* selects any <p> that is the last element among its siblings */ p:last-child { color: lime; } note: as originally defined, the selected element had to have a parent.
... working draft matching elements are not required to have a parent.
:root - CSS: Cascading Style Sheets
Web › CSS › :root
the :root css pseudo-class matches the root element of a tree representing the document.
... in html, :root represents the <html> element and is identical to the selector html, except that its specificity is higher.
... /* selects the root element of the document: <html> in the case of html */ :root { background: yellow; } syntax :root examples declaring global css variables :root can be useful for declaring global css variables: :root { --main-color: hotpink; --pane-padding: 5px 42px; } specifications specification status comment selectors level 4the definition of ':root' in that specification.
@charset - CSS: Cascading Style Sheets
Web › CSS › @charset
it must be the first element in the style sheet and not be preceded by any character; as it is not a nested statement, it cannot be used inside conditional group at-rules.
... if several @charset at-rules are defined, only the first one is used, and it cannot be used inside a style attribute on an html element or inside the <style> element where the character set of the html page is relevant.
... use the character encoding defined by the referring document: the charset attribute of the <link> element.
font-display - CSS: Cascading Style Sheets
Web › CSS › @font-face › font-display
the timeline is divided into the three periods below which dictate the rendering behavior of any elements using the font face.
... font block period if the font face is not loaded, any element attempting to use it must render an invisible fallback font face.
... font swap period if the font face is not loaded, any element attempting to use it must render a fallback font face.
display-mode - CSS: Cascading Style Sheets
Web › CSS › @media › display-mode
in this mode, the user agent will exclude ui elements for controlling navigation, but can include other ui elements such as a status bar.
... minimal-ui minimal-ui the application will look and feel like a standalone application, but will have a minimal set of ui elements for controlling navigation.
... the elements will vary by browser.
Alternative style sheets - CSS: Cascading Style Sheets
Web › CSS › Alternative style sheets
an example: specifying the alternative stylesheets the alternate stylesheets are commonly specified using a <link> element with rel="alternate stylesheet" and title="..." attributes.
... when style sheets are referenced with a title attribute on the <link rel="stylesheeet"> or <style> element, the title becomes one of the choices offered to the user.
... living standard html living standardthe definition of 'the "title" attribute for the style element' in that specification.
Stacking without the z-index property - CSS: Cascading Style Sheets
Web › CSS › CSS Positioning › Understanding z index › Stacking without z-index
when the z-index property is not specified on any element, elements are stacked in the following order (from bottom to top): the background and borders of the root element descendant non-positioned blocks, in order of appearance in the html descendant positioned elements, in order of appearance in the html keep in mind, when the order property alters rendering from the "order of appearance in the html" within flex containers, it similarly affects the order for stacking context.
... in the example below, elements #1 through #4 are positioned elements.
... element #5 is static, and so is drawn below the other four elements, even though it comes later in the html markup.
Introducing the CSS Cascade - CSS: Cascading Style Sheets
Web › CSS › Cascade
cascading order the cascading algorithm determines how to find the value to apply for each property for each document element.
... it first filters all the rules from the different sources to keep only the rules that apply to a given element.
... that means rules whose selector matches the given element and which are part of an appropriate media at-rule.
Child combinator - CSS: Cascading Style Sheets
Web › CSS › Child combinator
it matches only those elements matched by the second selector that are the direct children of elements matched by the first.
... /* list items that are children of the "my-things" list */ ul.my-things > li { margin: 2em; } elements matched by the second selector must be the immediate children of the elements matched by the first selector.
... this is stricter than the descendant combinator, which matches all elements matched by the second selector for which there exists an ancestor element matched by the first selector, regardless of the number of "hops" up the dom.
Questions about CSS - CSS: Cascading Style Sheets
Web › CSS › FAQ
cascading style sheets (css) is a rule-based language allowing developers to define styles to apply to html elements (or other markup structures).
...with css, the sources of style definition for a given document element are in this order of precedence: the style attribute on an individual element tag the style element that defines a specific style sheet containing style declarations or a link element that links to a separate document containing the style element.
... in a web page, the style element is placed between the title statement and the body statement.
ID selectors - CSS: Cascading Style Sheets
Web › CSS › ID selectors
the css id selector matches an element based on the value of the element’s id attribute.
... in order for the element to be selected, its id attribute must match exactly the value given in the selector.
... /* the element with id="demo" */ #demo { border: red 2px solid; } syntax #id_value { style properties } note that syntactically (but not specificity-wise), this is equivalent to the following attribute selector: [id=id_value] { style properties } examples css #identified { background-color: skyblue; } html <div id="identified">this div has a special id on it!</div> <div>this is just a regular div.</div> result specifications specification status comment selectors level 4the definition of 'id selectors' in that specification.
Inline formatting context - CSS: Cascading Style Sheets
Web › CSS › Inline formatting context
in the example below, the two (<div>) elements with the black borders form a block formatting context, inside which each word participates in an inline formatting context.
...in the next example there is a (<span>) element wrapping a set of words wrapping onto two lines.
...in the example below you can see how the margin, border, and padding on the inline <span> element are added.
Pagination - CSS: Cascading Style Sheets
Web › CSS › Layout cookbook › Pagination
to ensure that the pagination is understandable by people using a screenreader, we mark the items up as a list inside a <nav> element, and then use css to display the layout visually as a row.
...the <nav> element is designated a flex container in order that we can center the list inside using the justify-content property.
...to help with this we have added aria-label="pagination" on the <nav> element.
Media queries - CSS: Cascading Style Sheets
Web › CSS › Media Queries
media queries in html in html, media queries can be applied to various elements: in the <link> element's media attribute, they define the media to which a linked resource (typically css) should be applied.
... in the <source> element's media attribute, they define the media to which that source should be applied.
... (this is only valid inside <picture> elements.) in the <style> element's media attribute, they define the media to which the style should be applied.
Privacy and the :visited selector - CSS: Cascading Style Sheets
Web › CSS › Privacy and the :visited selector
little white lies to preserve users' privacy, firefox and other browsers will lie to web applications under certain circumstances: the window.getcomputedstyle method, and similar functions such as element.queryselector, will always return values indicating that a user has never visited any of the links on a page.
... if you use a sibling selector such as :visited + span, the adjacent element (span in this example) will be styled as if the link were unvisited.
... in rare scenarios, if you're using nested link elements and the element being matched is different from the link whose presence in history is being tested, the element will be rendered as if the link were unvisited, as well.
CSS Tutorials - CSS: Cascading Style Sheets
Web › CSS › Tutorials
scaling background images css allows you to resize images used as an element's background.
... css transforms transforms allow you to change the position of elements by modifying their coordinate space: it allows for translating, rotating, and deforming them in the 2d or 3d spaces.
... css multi-column layouts css3 introduces a new layout allowing you to easily define multiple columns in an element.
WebKit CSS extensions - CSS: Cascading Style Sheets
Web › CSS › WebKit Extensions
pseudo-elements for web-compatibility reasons, blink, webkit, and gecko browsers treat all pseudo-elements starting with ::-webkit- as valid.
...t-media-controls-play-button ::-webkit-media-controls-timeline ::-webkit-media-controls-time-remaining-display ::-webkit-media-controls-toggle-closed-captions-button ::-webkit-media-controls-volume-control-container ::-webkit-media-controls-volume-control-hover-background ::-webkit-media-controls-volume-slider ::-webkit-meter-bar ::-webkit-meter-even-less-good-value ::-webkit-meter-inner-element ::-webkit-meter-optimum-value ::-webkit-meter-suboptimum-value -webkit-media-text-track-container ::-webkit-outer-spin-button ::-webkit-progress-bar ::-webkit-progress-inner-element ::-webkit-progress-value ::-webkit-search-cancel-button ::-webkit-search-results-button ::-webkit-slider-runnable-track ::-webkit-slider-thumb note: generally, if there is an invalid pseudo-element or p...
...if a pseudo-element (but not pseudo-class) has a -webkit- prefix, as of firefox 63, blink, webkit and gecko browsers assume it is valid, not invalidating the selector list.
attr() - CSS: Cascading Style Sheets
Web › CSS › attr
the attr() css function is used to retrieve the value of an attribute of the selected element and use it in the stylesheet.
... it can also be used on pseudo-elements, in which case the value of the attribute on the pseudo-element's originating element is returned.
... /* simple usage */ attr(data-count); attr(title); /* with type */ attr(src url); attr(data-count number); attr(data-width px); /* with fallback */ attr(data-count number, 0); attr(src url, ""); attr(data-width px, inherit); attr(data-something, "default"); syntax values attribute-name is the name of an attribute on the html element referenced in the css.
backdrop-filter - CSS: Cascading Style Sheets
Web › CSS › backdrop-filter
the backdrop-filter css property lets you apply graphical effects such as blurring or color shifting to the area behind an element.
... because it applies to everything behind the element, to see the effect you must make the element or its background at least partially transparent.
... formal definition initial valuenoneapplies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednocomputed valueas specifiedanimation typea filter function list formal syntax none | <filter-function-list>where <filter-function-list> = [ <filter-function> | <url> ]+where <filter-function> = <blur()> | <brightness()> | <contrast()> | <drop-shadow()> | <grayscale()> | <hue-rotate()> | <inv...
background - CSS: Cascading Style Sheets
Web › CSS › background
guideline 1.1 explanations understanding success criterion 1.1.1 | w3c understanding wcag 2.0 formal definition initial valueas each of the properties of the shorthand:background-image: nonebackground-position: 0% 0%background-size: auto autobackground-repeat: repeatbackground-origin: padding-boxbackground-clip: border-boxbackground-attachment: scrollbackground-color: transparentapplies toall elements.
...] ]<bg-size> = [ <length-percentage> | auto ]{1,2} | cover | contain<repeat-style> = repeat-x | repeat-y | [ repeat | space | round | no-repeat ]{1,2}<attachment> = scroll | fixed | local<box> = border-box | padding-box | content-boxwhere <image> = <url> | <image()> | <image-set()> | <element()> | <paint()> | <cross-fade()> | <gradient><length-percentage> = <length> | <percentage>where <image()> = image( <image-tags>?
...)<image-set()> = image-set( <image-set-option># )<element()> = element( <id-selector> )<paint()> = paint( <ident>, <declaration-value>?
block-size - CSS: Cascading Style Sheets
Web › CSS › block-size
the block-size css property defines the horizontal or vertical size of an element's block, depending on its writing mode.
...length> values */ block-size: 300px; block-size: 25em; /* <percentage> values */ block-size: 75%; /* keyword values */ block-size: max-content; block-size: min-content; block-size: fit-content(20em); block-size: auto; /* global values */ block-size: inherit; block-size: initial; block-size: unset; if the writing mode is vertically oriented, the value of block-size relates to the width of the element; otherwise, it relates to the height of the element.
... a related property is inline-size, which defines the other dimension of the element.
border-block-end-color - CSS: Cascading Style Sheets
Web › CSS › border-block-end-color
the border-block-end-color css property defines the color of the logical block-end border of an element, which maps to a physical border color depending on the element's writing mode, directionality, and text orientation.
... syntax border-block-end-color: yellow; border-block-end-color: #f5f6f7; related properties are border-block-start-color, border-inline-start-color, and border-inline-end-color, which define the other border colors of the element.
... formal definition initial valuecurrentcolorapplies toall elementsinheritednocomputed valuecomputed coloranimation typea color formal syntax <'border-top-color'> examples border color with vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 10px solid blue; border-block-end-color: red; } results specifications specification status comment css logical properties and values level 1the definition of 'border-block-end-color' in that specification.
border-block-end-style - CSS: Cascading Style Sheets
Web › CSS › border-block-end-style
the border-block-end-style css property defines the style of the logical block-end border of an element, which maps to a physical border style depending on the element's writing mode, directionality, and text orientation.
... syntax /* <'border-style'> values */ border-block-end-style: dashed; border-block-end-style: dotted; border-block-end-style: groove; related properties are border-block-start-style, border-inline-start-style, and border-inline-end-style, which define the other border styles of the element.
... formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <'border-top-style'> examples dashed border with vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 5px solid blue; border-block-end-style: dashed; } results specifications specification status comment css logical properties and values level 1the definition of 'border-block-end-style' in that specification.
border-block-end-width - CSS: Cascading Style Sheets
Web › CSS › border-block-end-width
the border-block-end-width css property defines the width of the logical block-end border of an element, which maps to a physical border width depending on the element's writing mode, directionality, and text orientation.
... syntax /* <'border-width'> values */ border-block-end-width: 5px; border-block-end-width: thick; related properties are border-block-start-width, border-inline-start-width, and border-inline-end-width, which define the other border widths of the element.
... formal definition initial valuemediumapplies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueabsolute length; 0 if the border style is none or hiddenanimation typea length formal syntax <'border-top-width'> examples border width with veritcal text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 1px solid blue; border-block-end-width: 5px; } results specifications specification status comment css logical properties and values level 1the definition of 'border-block-end-width' in that specification.
border-block-end - CSS: Cascading Style Sheets
Web › CSS › border-block-end
the physical border to which it maps depends on the element's writing mode, directionality, and text orientation.
... related properties are border-block-start, border-inline-start, and border-inline-end, which define the other borders of the element.
... formal definition initial valueas each of the properties of the shorthand:border-top-width: mediumborder-top-style: noneborder-top-color: currentcolorapplies toall elementsinheritednocomputed valueas each of the properties of the shorthand:border-top-width: the absolute length or 0 if border-top-style is none or hiddenborder-top-style: as specifiedborder-top-color: computed coloranimation typeas each of the properties of the shorthand:border-block-end-color: a colorborder-block-end-style: discreteborder-block-end-width: a length formal syntax <'border-top-width'>...
border-block-start-color - CSS: Cascading Style Sheets
Web › CSS › border-block-start-color
the border-block-start-color css property defines the color of the logical block-start border of an element, which maps to a physical border color depending on the element's writing mode, directionality, and text orientation.
... syntax border-block-start-color: blue; border-block-start-color: #4c5d21; related properties are border-block-end-color, border-inline-start-color, and border-inline-end-color, which define the other border colors of the element.
... values <'color'> see border-color formal definition initial valuecurrentcolorapplies toall elementsinheritednocomputed valuecomputed coloranimation typea color formal syntax <'border-top-color'> examples border color with vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 10px solid blue; border-block-start-color: red; } results specifications specification status comment css logical properties and values level 1the definition of 'border-block-start-color' in that specification.
border-block-start-style - CSS: Cascading Style Sheets
Web › CSS › border-block-start-style
the border-block-start-style css property defines the style of the logical block start border of an element, which maps to a physical border style depending on the element's writing mode, directionality, and text orientation.
... syntax /* <'border-style'> values */ border-block-start-style: dashed; border-block-start-style: dotted; border-block-start-style: groove; related properties are border-block-end-style, border-inline-start-style, and border-inline-end-style, which define the other border styles of the element.
... formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <'border-top-style'> examples dashed border wtih vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 5px solid blue; border-block-start-style: dashed; } results specifications specification status comment css logical properties and values level 1the definition of 'border-block-start-style' in that specification.
border-block-start - CSS: Cascading Style Sheets
Web › CSS › border-block-start
the physical border to which it maps depends on the element's writing mode, directionality, and text orientation.
... related properties are border-block-end, border-inline-start, and border-inline-end, which define the other borders of the element.
...of the properties of the shorthand:border-width: as each of the properties of the shorthand:border-top-width: mediumborder-right-width: mediumborder-bottom-width: mediumborder-left-width: mediumborder-style: as each of the properties of the shorthand:border-top-style: noneborder-right-style: noneborder-bottom-style: noneborder-left-style: nonecolor: varies from one browser to anotherapplies toall elementsinheritednocomputed valueas each of the properties of the shorthand:border-width: as each of the properties of the shorthand:border-bottom-width: the absolute length or 0 if border-bottom-style is none or hiddenborder-left-width: the absolute length or 0 if border-left-style is none or hiddenborder-right-width: the absolute length or 0 if border-right-style is none or hiddenborder-top-width: the ...
border-bottom-width - CSS: Cascading Style Sheets
Web › CSS › border-bottom-width
the border-bottom-width css property sets the width of the bottom border of an element.
... formal definition initial valuemediumapplies toall elements.
... it also applies to ::first-letter.inheritednocomputed valuethe absolute length or 0 if border-bottom-style is none or hiddenanimation typea length formal syntax <line-width>where <line-width> = <length> | thin | medium | thick examples comparing bottom border widths html <div>element 1</div> <div>element 2</div> css div { border: 1px solid red; margin: 1em 0; } div:nth-child(1) { border-bottom-width: thick; } div:nth-child(2) { border-bottom-width: 2em; } result specifications specification status comment css backgrounds and borders module level 3the definition of 'border-bottom-width' in that specification.
border-color - CSS: Cascading Style Sheets
Web › CSS › border-color
the border-color shorthand css property sets the color of an element's border.
... you can find more information about border colors in borders in applying color to html elements using css.
... formal definition initial valueas each of the properties of the shorthand:border-top-color: currentcolorborder-right-color: currentcolorborder-bottom-color: currentcolorborder-left-color: currentcolorapplies toall elements.
border-end-end-radius - CSS: Cascading Style Sheets
Web › CSS › border-end-end-radius
the border-end-end-radius css property defines a logical border radius on an element, which maps to a physical border radius that depends on on the element's writing-mode, direction, and text-orientation.
... formal definition initial value0applies toall elements; but user agents are not required to apply to table and inline-table elements when border-collapse is collapse.
... the behavior on internal table elements is undefined for the moment..
border-end-start-radius - CSS: Cascading Style Sheets
Web › CSS › border-end-start-radius
the border-end-start-radius css property defines a logical border radius on an element, which maps to a physical border radius depending on the element's writing-mode, direction, and text-orientation.
... formal definition initial value0applies toall elements; but user agents are not required to apply to table and inline-table elements when border-collapse is collapse.
... the behavior on internal table elements is undefined for the moment..
border-image-repeat - CSS: Cascading Style Sheets
Web › CSS › border-image-repeat
the border-image-repeat css property defines how the edge regions of a source image are adjusted to fit the dimensions of an element's border image.
... formal definition initial valuestretchapplies toall elements, except internal table elements when border-collapse is collapse.
...y out various border repetition rules on me!</div> <select id="repetition"> <option value="stretch">stretch</option> <option value="repeat">repeat</option> <option value="round">round</option> <option value="space">space</option> <option value="stretch repeat">stretch repeat</option> <option value="space round">space round</option> </select> javascript var repetition = document.getelementbyid("repetition"); repetition.addeventlistener("change", function (evt) { document.getelementbyid("bordered").style.borderimagerepeat = evt.target.value; }); results specifications specification status comment css backgrounds and borders module level 3the definition of 'border-image-repeat' in that specification.
border-image-width - CSS: Cascading Style Sheets
Web › CSS › border-image-width
the border-image-width css property sets the width of an element's border image.
... if this property's value is greater than the element's border-width, the border image will extend beyond the padding (and/or content) edge.
... formal definition initial value1applies toall elements, except internal table elements when border-collapse is collapse.
border-inline-end-style - CSS: Cascading Style Sheets
Web › CSS › border-inline-end-style
the border-inline-end-style css property defines the style of the logical inline end border of an element, which maps to a physical border style depending on the element's writing mode, directionality, and text orientation.
... syntax /* <'border-style'> values */ border-inline-end-style: dashed; border-inline-end-style: dotted; border-inline-end-style: groove; related properties are border-block-start-style, border-block-end-style, and border-inline-start-style, which define the other border styles of the element.
... formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <'border-top-style'> examples html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 5px solid blue; border-inline-end-style: dashed; } results specifications specification status comment css logical properties and values level 1the definition of 'border-inline-end-style' in that specification.
border-inline-start-color - CSS: Cascading Style Sheets
Web › CSS › border-inline-start-color
the border-inline-start-color css property defines the color of the logical inline start border of an element, which maps to a physical border color depending on the element's writing mode, directionality, and text orientation.
... syntax border-inline-start-color: red; border-inline-start-color: #ee4141; related properties are border-block-start-color, border-block-end-color, and border-inline-end-color, which define the other border colors of the element.
... formal definition initial valuecurrentcolorapplies toall elementsinheritednocomputed valuecomputed coloranimation typea color formal syntax <'border-top-color'> examples html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 10px solid blue; border-inline-start-color: red; } specifications specification status comment css logical properties and values level 1the definition of 'border-inline-start-color' in that specification.
border-inline-start-width - CSS: Cascading Style Sheets
Web › CSS › border-inline-start-width
the border-inline-start-width css property defines the width of the logical inline-start border of an element, which maps to a physical border width depending on the element's writing mode, directionality, and text orientation.
... syntax /* <'border-width'> values */ border-inline-start-width: 5px; border-inline-start-width: thick; related properties are border-block-start-width, border-block-end-width, and border-inline-end-width, which define the other border widths of the element.
... formal definition initial valuemediumapplies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueabsolute length; 0 if the border style is none or hiddenanimation typea length formal syntax <'border-top-width'> examples html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 1px solid blue; border-inline-start-width: 5px; } specifications specification status comment css logical properties and values level 1the definition of 'border-inline-start-width' in that specification.
border-inline-start - CSS: Cascading Style Sheets
Web › CSS › border-inline-start
constituent properties this property is a shorthand for the following css properties: border-inline-start-color border-inline-start-style border-inline-start-width syntax border-inline-start: 1px; border-inline-start: 2px dotted; border-inline-start: medium dashed green; the physical border to which border-inline-start maps depends on the element's writing mode, directionality, and text orientation.
... related properties are border-block-start, border-block-end, and border-inline-end, which define the other borders of the element.
...of the properties of the shorthand:border-width: as each of the properties of the shorthand:border-top-width: mediumborder-right-width: mediumborder-bottom-width: mediumborder-left-width: mediumborder-style: as each of the properties of the shorthand:border-top-style: noneborder-right-style: noneborder-bottom-style: noneborder-left-style: nonecolor: varies from one browser to anotherapplies toall elementsinheritednocomputed valueas each of the properties of the shorthand:border-width: as each of the properties of the shorthand:border-bottom-width: the absolute length or 0 if border-bottom-style is none or hiddenborder-left-width: the absolute length or 0 if border-left-style is none or hiddenborder-right-width: the absolute length or 0 if border-right-style is none or hiddenborder-top-width: the ...
border-inline - CSS: Cascading Style Sheets
Web › CSS › border-inline
border-inline: 1px; border-inline: 2px dotted; border-inline: medium dashed blue; the physical borders to which border-inline maps depends on the element's writing mode, directionality, and text orientation.
... initial valueas each of the properties of the shorthand:border-top-width: mediumborder-top-style: noneborder-top-color: currentcolorapplies toall elementsinheritednocomputed valueas each of the properties of the shorthand:border-top-width: the absolute length or 0 if border-top-style is none or hiddenborder-top-style: as specifiedborder-top-color: computed coloranimation typediscrete constituent properties this property is a shorthand for the following css properties: border-inline-color border-inline-style border-inline-width syntax val...
... formal definition initial valueas each of the properties of the shorthand:border-top-width: mediumborder-top-style: noneborder-top-color: currentcolorapplies toall elementsinheritednocomputed valueas each of the properties of the shorthand:border-top-width: the absolute length or 0 if border-top-style is none or hiddenborder-top-style: as specifiedborder-top-color: computed coloranimation typediscrete formal syntax <'border-top-width'> | <'border-top-style'> | <'color'>where <color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | current...
border-left-width - CSS: Cascading Style Sheets
Web › CSS › border-left-width
the border-left-width css property sets the width of the left border of an element.
... formal definition initial valuemediumapplies toall elements.
... it also applies to ::first-letter.inheritednocomputed valuethe absolute length or 0 if border-left-style is none or hiddenanimation typea length formal syntax <line-width>where <line-width> = <length> | thin | medium | thick examples comparing border widths html <div>element 1</div> <div>element 2</div> css div { border: 1px solid red; margin: 1em 0; } div:nth-child(1) { border-left-width: thick; } div:nth-child(2) { border-left-width: 2em; } result specifications specification status comment css backgrounds and borders module level 3the definition of 'border-left-width' in that specification.
border-right-width - CSS: Cascading Style Sheets
Web › CSS › border-right-width
the border-right-width css property sets the width of the right border of an element.
... formal definition initial valuemediumapplies toall elements.
... it also applies to ::first-letter.inheritednocomputed valuethe absolute length or 0 if border-right-style is none or hiddenanimation typea length formal syntax <line-width>where <line-width> = <length> | thin | medium | thick examples comparing border widths html <div>element 1</div> <div>element 2</div> css div { border: 1px solid red; margin: 1em 0; } div:nth-child(1) { border-right-width: thick; } div:nth-child(2) { border-right-width: 2em; } result specifications specification status comment css backgrounds and borders module level 3the definition of 'border-right-width' in that specification.
border-start-end-radius - CSS: Cascading Style Sheets
Web › CSS › border-start-end-radius
the border-start-end-radius css property defines a logical border radius on an element, which maps to a physical border radius depending on the element's writing-mode, direction, and text-orientation.
... formal definition initial value0applies toall elements; but user agents are not required to apply to table and inline-table elements when border-collapse is collapse.
... the behavior on internal table elements is undefined for the moment..
border-start-start-radius - CSS: Cascading Style Sheets
Web › CSS › border-start-start-radius
the border-start-start-radius css property defines a logical border radius on an element, which maps to a physical border radius that depends on the element's writing-mode, direction, and text-orientation.
... formal definition initial value0applies toall elements; but user agents are not required to apply to table and inline-table elements when border-collapse is collapse.
... the behavior on internal table elements is undefined for the moment..
border-top-style - CSS: Cascading Style Sheets
Web › CSS › border-top-style
the border-top-style css property sets the line style of an element's top border.
... formal definition initial valuenoneapplies toall elements.
... initial valuenoneapplies toall elements.
border-top-width - CSS: Cascading Style Sheets
Web › CSS › border-top-width
the border-top-width css property sets the width of the top border of an element.
... formal definition initial valuemediumapplies toall elements.
... it also applies to ::first-letter.inheritednocomputed valuethe absolute length or 0 if border-top-style is none or hiddenanimation typea length formal syntax <line-width>where <line-width> = <length> | thin | medium | thick examples html <div>element 1</div> <div>element 2</div> css div { border: 1px solid red; margin: 1em 0; } div:nth-child(1) { border-top-width: thick; } div:nth-child(2) { border-top-width: 2em; } result specifications specification status comment css backgrounds and borders module level 3the definition of 'border-top-width' in that specification.
border - CSS: Cascading Style Sheets
Web › CSS › border
the border shorthand css property sets an element's border.
...however, outlines differ from borders in the following ways: outlines never take up space, as they are drawn outside of an element's content.
...border-bottom-width: mediumborder-left-width: mediumborder-style: as each of the properties of the shorthand:border-top-style: noneborder-right-style: noneborder-bottom-style: noneborder-left-style: noneborder-color: as each of the properties of the shorthand:border-top-color: currentcolorborder-right-color: currentcolorborder-bottom-color: currentcolorborder-left-color: currentcolorapplies toall elements.
box-pack - CSS: Cascading Style Sheets
Web › CSS › box-pack
/* keyword values */ box-pack: start; box-pack: center; box-pack: end; box-pack: justify; /* global values */ box-pack: inherit; box-pack: initial; box-pack: unset; the direction of layout depends on the element's orientation: horizontal or vertical.
... if the packing is set using the element's pack attribute, then the style is ignored.
... formal definition initial valuestartapplies toelements with a css display value of -moz-box, -moz-inline-box, -webkit-box or -webkit-inline-boxinheritednocomputed valueas specifiedanimation typediscrete formal syntax start | center | end | justify examples div.example { border-style: solid; display: -moz-box; /* mozilla */ display: -webkit-box; /* webkit */ /* make this box taller than the children, so there is room for the box-pack */ height: 300px; /* make this box wide enough to show the contents are centered horizontally */ width: 300px; /* children should be oriented vertically */ -moz-box-orient: vertical; /* mozilla */ -webkit-box-orient: vertical; /* webkit */ /* align children to the horizontal center of this box */ -moz-box-align: center; /* ...
caret-color - CSS: Cascading Style Sheets
Web › CSS › caret-color
the caret appears in elements such as <input> or those with the contenteditable attribute.
...on the other hand, the mouse cursor image shown when hovering over text where the cursor property is auto, or when hovering over an element where the cursor property is text or vertical-text, though it sometimes looks like a caret, is not a caret (it’s a cursor).
... formal definition initial valueautoapplies toall elementsinheritedyescomputed valueauto is computed as specified and <color> values are computed as defined for the color property.animation typea color formal syntax auto | <color>where <color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>where <rgb()> = rgb( <percentage>{3} [ / <alpha-value> ]?
hanging-punctuation - CSS: Cascading Style Sheets
Web › CSS › hanging-punctuation
first an opening bracket or quote at the start of the first formatted line of an element hangs.
... last a closing bracket or quote at the end of the last formatted line of an element hangs.
... formal definition initial valuenoneapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax none | [ first | [ force-end | allow-end ] | last ] examples setting opening and closing quotes to hang html <p>“lorem ipsum dolor sit amet, consectetur adipiscing elit.
image-orientation - CSS: Cascading Style Sheets
Web › CSS › image-orientation
its functionality may be moved into properties on the <img> and/or <picture> elements, with the possible exception of from-image.
... formal definition initial value0degapplies toall elementsinheritedyescomputed valuean <angle>, rounded to the next quarter turn from 0deg and normalized, that is moduloing the value by 1turnanimation typediscrete formal syntax from-image | <angle> | [ <angle>?
...ta css #image { image-orientation: from-image; /* can be changed in the live sample */ } html <img id="image" src="https://udn.realityripple.com/samples/db/4f9fbd7dfb.svg" alt="orientation taken from the image"> <select id="imageorientation"> <option value="from-image">from-image</option> <option value="none">none</option> </select> javascript var imageorientation = document.getelementbyid("imageorientation"); imageorientation.addeventlistener("change", function (evt) { document.getelementbyid("image").style.imageorientation = evt.target.value; }); result specifications specification status comment css images module level 3the definition of 'image-orientation' in that specification.
inherit - CSS: Cascading Style Sheets
Web › CSS › inherit
the inherit css keyword causes the element for which it is specified to take the computed value of the property from its parent element.
... inheritance is always from the parent element in the document tree, even when the parent element is not the containing block.
... examples exclude selected elements from a rule /* make second-level headers green */ h2 { color: green; } /* ...but leave those in the sidebar alone so they use their parent's color */ #sidebar h2 { color: inherit; } in this example the h2 elements inside the sidebar might be different colors.
initial - CSS: Cascading Style Sheets
Web › CSS › initial
the initial css keyword applies the initial (or default) value of a property to an element.
... examples using initial to reset color for an element html <p> <span>this text is red.</span> <em>this text is in the initial color (typically black).</em> <span>this is red again.</span> </p> css p { color: red; } em { color: initial; } result specifications specification status comment css cascading and inheritance level 4the definition of 'initial' in that specification.
... use inherit to make an element's property the same as its parent.
inline-size - CSS: Cascading Style Sheets
Web › CSS › inline-size
the inline-size css property defines the horizontal or vertical size of an element's block, depending on its writing mode.
...es */ inline-size: 300px; inline-size: 25em; /* <percentage> values */ inline-size: 75%; /* keyword values */ inline-size: max-content; inline-size: min-content; inline-size: fit-content(20em); inline-size: auto; /* global values */ inline-size: inherit; inline-size: initial; inline-size: unset; if the writing mode is vertically oriented, the value of inline-size relates to the height of the element; otherwise, it relates to the width of the element.
... a related property is block-size, which defines the other dimension of the element.
list-style - CSS: Cascading Style Sheets
Web › CSS › list-style
note: this property is applied to list items, i.e., elements with display: list-item; .
... by default this includes <li> elements.
... because this property is inherited, it can be set on a parent element (normally <ol> or <ul>) to make the same list styling apply to all the items inside.
mask-border-outset - CSS: Cascading Style Sheets
Web › CSS › mask-border-outset
the mask-border-outset css property specifies the distance by which an element's mask border is set out from its border box.
... formal definition initial value0applies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednocomputed valueas specified, but with relative lengths converted into absolute lengthsanimation typediscrete formal syntax [ <length> | <number> ]{1,4} examples basic usage this property doesn't appear to be supported anywhere yet.
... when it eventually starts to be supported, it will serve to move the mask away from the inner edge of the element's border box — you can use it to make the mask start from part way across the border, rather than the inside of it.
mask-border-source - CSS: Cascading Style Sheets
Web › CSS › mask-border-source
the mask-border-source css property sets the source image used to create an element's mask border.
... formal definition initial valuenoneapplies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednocomputed valueas specified, but with <url> values made absoluteanimation typediscrete formal syntax none | <image>where <image> = <url> | <image()> | <image-set()> | <element()> | <paint()> | <cross-fade()> | <gradient>where <image()> = image( <image-tags>?
...)<image-set()> = image-set( <image-set-option># )<element()> = element( <id-selector> )<paint()> = paint( <ident>, <declaration-value>?
mask-image - CSS: Cascading Style Sheets
Web › CSS › mask-image
the mask-image css property sets the image that is used as mask layer for an element.
... formal definition initial valuenoneapplies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednocomputed valueas specified, but with <url> values made absoluteanimation typediscrete formal syntax <mask-reference>#where <mask-reference> = none | <image> | <mask-source>where <image> = <url> | <image()> | <image-set()> | <element()> | <paint()> | <cross-fade()> | <gradient><mask-source> ...
...)<image-set()> = image-set( <image-set-option># )<element()> = element( <id-selector> )<paint()> = paint( <ident>, <declaration-value>?
mask-size - CSS: Cascading Style Sheets
Web › CSS › mask-size
; mask-size: 3em 25%; mask-size: auto 6px; mask-size: auto auto; /* multiple values */ /* do not confuse this with mask-size: auto auto */ mask-size: auto, auto; mask-size: 50%, 25%, 25%; mask-size: 6px, auto, contain; /* global values */ mask-size: inherit; mask-size: initial; mask-size: unset; note: if the value of this property is not set in a mask shorthand property that is applied to the element after the mask-size css property, the value of this property is then reset to its initial value by the shorthand property.
... formal definition initial valueautoapplies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednocomputed valueas specified, but with relative lengths converted into absolute lengthsanimation typerepeatable list of simple list of length, percentage, or calc formal syntax <bg-size>#where <bg-size> = [ <length-percentage> | auto ]{1,2} | cover | containwhere <length-percentage> = <length...
...sample */ margin-bottom: 10px; } html <div id="masked"> </div> <select id="masksize"> <option value="auto">auto</option> <option value="40% 80%">40% 80%</option> <option value="50%" selected>50%</option> <option value="200px 100px">200px 100px</option> <option value="cover">cover</option> <option value="contain">contain</option> </select> javascript var masksize = document.getelementbyid("masksize"); masksize.addeventlistener("change", function (evt) { document.getelementbyid("masked").style.masksize = evt.target.value; }); result specifications specification status comment css masking module level 1the definition of 'mask-size' in that specification.
max-inline-size - CSS: Cascading Style Sheets
Web › CSS › max-inline-size
the max-inline-size css property defines the horizontal or vertical maximum size of an element's block depending on its writing mode.
...if the writing mode is vertically oriented, the value of max-inline-size relates to the maximal height of the element, otherwise it relates to the maximal width of the element.
... it relates to max-block-size, which defines the other dimension of the element.
min-block-size - CSS: Cascading Style Sheets
Web › CSS › min-block-size
the min-block-size css property defines the minimum horizontal or vertical size of an element's block, depending on its writing mode.
...ize: 100px; min-block-size: 5em; /* <percentage> values */ min-block-size: 10%; /* keyword values */ min-block-size: max-content; min-block-size: min-content; min-block-size: fit-content(20em); /* global values */ min-block-size: inherit; min-block-size: initial; min-block-size: unset; if the writing mode is vertically oriented, the value of min-block-size relates to the minimum width of the element; otherwise, it relates to the minimum height of the element.
... a related property is min-inline-size, which defines the other dimension of the element.
min-inline-size - CSS: Cascading Style Sheets
Web › CSS › min-inline-size
the min-inline-size css property defines the horizontal or vertical minimal size of an element's block, depending on its writing mode.
...; min-inline-size: 5em; /* <percentage> values */ min-inline-size: 10%; /* keyword values */ min-inline-size: max-content; min-inline-size: min-content; min-inline-size: fit-content(20em); /* global values */ min-inline-size: inherit; min-inline-size: initial; min-inline-size: unset; if the writing mode is vertically oriented, the value of min-inline-size relates to the minimum height of the element; otherwise, it relates to the minimum width of the element.
... a related property is min-block-size, which defines the other dimension of the element.
mix-blend-mode - CSS: Cascading Style Sheets
Web › CSS › mix-blend-mode
the mix-blend-mode css property sets how an element's content should blend with the content of the element's parent and the element's background.
... formal definition initial valuenormalapplies toall elementsinheritednocomputed valueas specifiedanimation typediscretecreates stacking contextyes formal syntax <blend-mode>where <blend-mode> = normal | multiply | screen | overlay | darken | lighten | color-dodge | color-burn | hard-light | soft-light | difference | exclusion | hue | saturation | color | luminosity examples effect of different mix-blend-mode values <div class="grid"> <div class="c...
... 41chrome android full support 41firefox android full support 32opera android full support 28safari ios full support 8samsung internet android full support 4.0on svg elementschrome full support 41edge full support 79firefox full support 32ie no support noopera full support 28safari no support nowebview...
offset - CSS: Cascading Style Sheets
Web › CSS › offset
the offset css shorthand property sets all the properties required for animating an element along a defined path.
...e.svg) 30deg; offset: url(circle.svg) 50px 20deg; /* including offset anchor */ offset: ray(45deg closest-side) / 40px 20px; offset: url(arc.svg) 2cm / 0.5cm 3cm; offset: url(arc.svg) 30deg / 50px 100px; formal definition initial valueas each of the properties of the shorthand:offset-position: autooffset-path: noneoffset-distance: 0offset-anchor: autooffset-rotate: autoapplies totransformable elementsinheritednopercentagesas each of the properties of the shorthand:offset-position: refertosizeofcontainingblockoffset-distance: refer to the total path lengthoffset-anchor: relativetowidthandheightcomputed valueas each of the properties of the shorthand:offset-position: for <length> the absolute value, otherwise a percentageoffset-path: as specifiedoffset-distance: for <length> the absolute value,...
... examples animating an element along a path html <div id="offsetelement"></div> css @keyframes move { from { offset-distance: 0%; } to { offset-distance: 100%; } } #offsetelement { width: 50px; height: 50px; background-color: blue; offset: path("m 100 100 l 300 100 l 200 300 z") auto; animation: move 3s linear infinite; } result specifications specification status comment ...
outline-style - CSS: Cascading Style Sheets
Web › CSS › outline-style
the outline-style css property sets the style of an element's outline.
... an outline is a line that is drawn around an element, outside the border.
... formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax auto | <'border-style'> examples setting outline style to auto the auto value indicates a custom outline style — typically a style [that] is either a user interface default for the platform, or perhaps a style that is richer than can be described in detail in css, e.g.
outline-width - CSS: Cascading Style Sheets
Web › CSS › outline-width
the css outline-width property sets the thickness of an element's outline.
... an outline is a line that is drawn around an element, outside the border.
... formal definition initial valuemediumapplies toall elementsinheritednocomputed valuean absolute length; if the keyword none is specified, the computed value is 0animation typea length formal syntax <line-width>where <line-width> = <length> | thin | medium | thick examples setting an element's outline width html <span id="thin">thin</span> <span id="medium">medium</span> <span id="thick">thick</span> <span id="twopixels">2px</span> <span id="oneex">...
Guide to scroll anchoring - CSS: Cascading Style Sheets
Web › CSS › overflow-anchor › Guide to scroll anchoring
this has happened because large images or some other elements have just loaded further up in the content.
... to opt out the entire document, you can set it on the <body> element: body { overflow-anchor: none; } to opt out a certain part of the document use overflow-anchor: none on its container element: .container { overflow-anchor: none; } note: the specification details that once scroll anchoring has been opted out of, you cannot opt back into it from a child element.
... in bug 1584285 the layout.css.scroll-anchoring.suppressions.enabled flag was added to firefox nightly in order to allow the disabling of these triggers further reading explainer document on the wicg site scroll anchoring for web developers on the chromium blog implement a pin-to-bottom scrolling element using scroll anchoring ...
overflow-anchor - CSS: Cascading Style Sheets
Web › CSS › overflow-anchor
syntax /* keyword values */ overflow-anchor: auto; overflow-anchor: none; /* global values */ overflow-anchor: inherit; overflow-anchor: initial; overflow-anchor: unset; values auto the element becomes a potential anchor when adjusting scroll position.
... none the element won't be selected as a potential anchor.
... formal definition initial valueautoapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax auto | none examples prevent scroll anchoring to prevent scroll anchoring in a document, use the overflow-anchor property.
overflow-wrap - CSS: Cascading Style Sheets
Web › CSS › overflow-wrap
the overflow-wrap css property applies to inline elements, setting whether the browser should insert line breaks within an otherwise unbreakable string to prevent text from overflowing its line box.
... formal definition initial valuenormalapplies tonon-replaced inline elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax normal | break-word | anywhere examples comparing overflow-wrap, word-break, and hyphens this example compares the results of overflow-wrap, word-break, and hyphens when breaking up a long word.
... working draft initial definition initial valuenormalapplies tonon-replaced inline elementsinheritedyescomputed valueas specifiedanimation typediscrete ...
overscroll-behavior-block - CSS: Cascading Style Sheets
Web › CSS › overscroll-behavior-block
contain default scroll overflow behavior is observed inside the element this value is set on (e.g.
...underlying elements will not scroll.
... formal definition initial valueautoapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax contain | none | auto examples preventing block overscrolling in this demo we have two block-level boxes, one inside the other.
overscroll-behavior-inline - CSS: Cascading Style Sheets
Web › CSS › overscroll-behavior-inline
contain default scroll overflow behavior is observed inside the element this value is set on (e.g.
...underlying elements will not scroll.
... formal definition initial valueautoapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax contain | none | auto examples preventing inline overscrolling in this demo we have two block-level boxes, one inside the other.
overscroll-behavior-x - CSS: Cascading Style Sheets
Web › CSS › overscroll-behavior-x
contain default scroll overflow behavior is observed inside the element this value is set on (e.g.
...underlying elements will not scroll.
... formal definition initial valueautoapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax contain | none | auto examples preventing an underlying element from scrolling horizontally in our simple overscroll-behavior-x example (see source code also), we have two block-level boxes, one inside the other.
padding-block-end - CSS: Cascading Style Sheets
Web › CSS › padding-block-end
the padding-block-end css property defines the logical block end padding of an element, which maps to a physical padding depending on the element's writing mode, directionality, and text orientation.
... it relates to padding-block-start, padding-inline-start, and padding-inline-end, which define the other paddings of the element.
... formal definition initial value0applies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueas <length>animation typea length formal syntax <'padding-left'> examples setting block end padding for vertical text html content <div> <p class="exampletext">example text</p> </div> css content div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; padding-block-end: 20px; background-color: #c8c800; } result specifications specification status comment css logical properties and values level 1the definition of 'padding-block-end' in that specification.
padding-block-start - CSS: Cascading Style Sheets
Web › CSS › padding-block-start
the padding-block-start css property defines the logical block start padding of an element, which maps to a physical padding depending on the element's writing mode, directionality, and text orientation.
... it relates to padding-block-end, padding-inline-start, and padding-inline-end, which define the other paddings of the element.
... formal definition initial value0applies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueas <length>animation typea length formal syntax <'padding-left'> examples setting block start padding for vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; padding-block-start: 20px; background-color: #c8c800; } result specifications specification status comment css logical properties and values level 1the definition of 'padding-block-start' in that specification.
padding-inline-end - CSS: Cascading Style Sheets
Web › CSS › padding-inline-end
the padding-inline-end css property defines the logical inline end padding of an element, which maps to a physical padding depending on the element's writing mode, directionality, and text orientation.
... it relates to padding-block-start, padding-block-end, and padding-inline-start, which define the other paddings of the element.
... formal definition initial value0applies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueas <length>animation typea length formal syntax <'padding-left'> examples setting inline end padding for vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; padding-inline-end: 20px; background-color: #c8c800; } specifications specification status comment css logical properties and values level 1the definition of 'padding-inline-end' in that specification.
padding-inline-start - CSS: Cascading Style Sheets
Web › CSS › padding-inline-start
the padding-inline-start css property defines the logical inline start padding of an element, which maps to a physical padding depending on the element's writing mode, directionality, and text orientation.
... it relates to padding-block-start, padding-block-end, and padding-inline-end, which define the other paddings of the element.
... formal definition initial value0applies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueas <length>animation typea length formal syntax <'padding-left'> examples setting inline start padding for vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; padding-inline-start: 20px; background-color: #c8c800; } specifications specification status comment css logical properties and values level 1the definition of 'padding-inline-start' in that specification.
<position> - CSS: Cascading Style Sheets
Web › CSS › position value
the <position> (or <bg-position>) css data type denotes a two-dimensional coordinate used to set a location relative to an element box.
... note: the final position described by the <position> value does not need to be inside the element's box.
...each keyword represents either an edge of the element's box or the center line between two edges.
row-gap (grid-row-gap) - CSS: Cascading Style Sheets
Web › CSS › row-gap
the row-gap css property sets the size of the gap (gutter) between an element's grid rows.
...<percentage> values are relative to the dimension of the element.
... formal definition initial valuenormalapplies tomulti-column elements, flex containers, grid containersinheritednopercentagesrefer to corresponding dimension of the content areacomputed valueas specified, with <length>s made absolute, and normal computing to zero except on multi-column elementsanimation typea length, percentage or calc(); formal syntax normal | <length-percentage>where <length-percentage> = <length> | <percentage> examples flex layout html <div id="flexbox"> <div></div> <div></div> <div></div> <div></div> <div></div> <div></div> </div> css #flexbox { display: flex; flex-wrap: wrap; width: 300px; row-gap: 20px; } #flexbox > div { border: 1px solid green; background-color: lime; flex: 1 1 auto; width: 100px; height: 50px; } result ...
scroll-margin-inline-end - CSS: Cascading Style Sheets
Web › CSS › scroll-margin-inline-end
formal definition initial value0applies toall elementsinheritednocomputed valueas specifiedanimation typeby computed value type formal syntax <length> examples simple demonstration this example implements something very similar to the interactive example above, except that here we'll explain to you how it's implemented.
... the child elements are styled as follows: .scroller > div { flex: 0 0 250px; width: 250px; background-color: #663399; color: #fff; font-size: 30px; display: flex; align-items: center; justify-content: center; scroll-snap-align: end; } .scroller > div:nth-child(2n) { background-color: #fff; color: #663399; } the most relevant part here is scroll-snap-align: end, which specifies that the rig...
... last of all we specify the scroll margin values, a different one for the second and third child elements: .scroller > div:nth-child(2) { scroll-margin-inline-end: 1rem; } .scroller > div:nth-child(3) { scroll-margin-inline-end: 2rem; } this means that when scrolling past the middle child elements, the scrolling will snap to 1rem outside the inline end edge of the second <div>, and 2rems outside the inline end edge of the third <div>.
scroll-margin-inline-start - CSS: Cascading Style Sheets
Web › CSS › scroll-margin-inline-start
formal definition initial value0applies toall elementsinheritednocomputed valueas specifiedanimation typeby computed value type formal syntax <length> examples simple demonstration this example implements something very similar to the interactive example above, except that here we'll explain to you how it's implemented.
... the child elements are styled as follows: .scroller > div { flex: 0 0 250px; width: 250px; background-color: #663399; color: #fff; font-size: 30px; display: flex; align-items: center; justify-content: center; scroll-snap-align: start; } .scroller > div:nth-child(2n) { background-color: #fff; color: #663399; } the most relevant part here is scroll-snap-align: start, which specifies that the...
... last of all we specify the scroll margin-values, a different one for the second and third child elements: .scroller > div:nth-child(2) { scroll-margin-inline-start: 1rem; } .scroller > div:nth-child(3) { scroll-margin-inline-start: 2rem; } this means that when scrolling past the middle child elements, the scrolling will snap to 1rem outside the inline start edge of the second <div>, and 2rems outside the inline start edge of the third <div>.
scroll-snap-stop - CSS: Cascading Style Sheets
Web › CSS › scroll-snap-stop
/* keyword values */ scroll-snap-stop: normal; scroll-snap-stop: always; /* global values */ scroll-snap-type: inherit; scroll-snap-type: initial; scroll-snap-type: unset; syntax values normal when the visual viewport of this element's scroll container is scrolled, it may "pass over" possible snap positions.
... always the scroll container must not "pass over" a possible snap position; and must snap to the first of this elements' snap positions.
... formal definition initial valuenormalapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax normal | always examples snapping in different axes this example is duplicated from scroll-snap-type with minor variances.
scrollbar-width - CSS: Cascading Style Sheets
Web › CSS › scrollbar-width
the scrollbar-width property allows the author to set the maximum thickness of an element’s scrollbars when they are shown.
... none no scrollbar shown, however the element will still be scrollable.
... note: user agents must apply any scrollbar-width value set on the root element to the viewport.
text-decoration - CSS: Cascading Style Sheets
Web › CSS › text-decoration
text decorations are drawn across descendant text elements.
... this means that if an element specifies a text decoration, then a child element can't remove the decoration.
... formal definition initial valueas each of the properties of the shorthand:text-decoration-color: currentcolortext-decoration-style: solidtext-decoration-line: noneapplies toall elements.
text-shadow - CSS: Cascading Style Sheets
Web › CSS › text-shadow
each shadow is described by some combination of x and y offsets from the element, blur radius, and color.
... this property applies to both ::first-line and ::first-letter pseudo-elements.
... formal definition initial valuenoneapplies toall elements.
text-transform - CSS: Cascading Style Sheets
Web › CSS › text-transform
the text-transform css property specifies how to capitalize an element's text.
...other characters remain unchanged (they retain their original case as written in the element's text).
... mdn understanding wcag, guideline 1.4 explanations w3c understanding wcag 2.1 formal definition initial valuenoneapplies toall elements.
scale3d() - CSS: Cascading Style Sheets
Web › CSS › transform-function › scale3d
the scale3d() css function defines a transformation that resizes an element in 3d space.
...if all three coordinates are equal, the scaling is uniform (isotropic) and the aspect ratio of the element is preserved (this is a homothetic transformation).
... when a coordinate value is outside the [-1, 1] range, the element grows along that dimension; when inside, it shrinks.
skewX() - CSS: Cascading Style Sheets
Web › CSS › transform-function › skewX
the skewx() css function defines a transformation that skews an element in the horizontal direction on the 2d plane.
... this transformation is a shear mapping (transvection) that distorts each point within an element by a certain angle in the horizontal direction.
... syntax skewx(a) values a is an <angle> representing the angle to use to distort the element along the abscissa.
skewY() - CSS: Cascading Style Sheets
Web › CSS › transform-function › skewY
the skewy() css function defines a transformation that skews an element in the vertical direction on the 2d plane.
... this transformation is a shear mapping (transvection) that distorts each point within an element by a certain angle in the vertical direction.
... syntax skewy(a) values a is an <angle> representing the angle to use to distort the element along the ordinate.
transform-origin - CSS: Cascading Style Sheets
Web › CSS › transform-origin
the transform-origin css property sets the origin for an element's transformations.
... this property is applied by first translating the element by the value of the property, then applying the element's transform, then translating by the negated property value.
... the keywords are convenience shorthands and match the following <percentage> values: keyword value left 0% center 50% right 100% top 0% bottom 100% formal definition initial value50% 50% 0applies totransformable elementsinheritednopercentagesrefer to the size of bounding boxcomputed valuefor <length> the absolute value, otherwise a percentageanimation typesimple list of length, percentage, or calc formal syntax [ <length-percentage> | left | center | right | top | bottom ] | [ [ <length-percentage> | left | center | right ] && [ <length-percentage> | top | center | bottom ] ] <length>?where <length-percentage>...
white-space - CSS: Cascading Style Sheets
Web › CSS › white-space
the white-space css property sets how white space inside an element is handled.
...lines are only broken at newline characters in the source and at <br> elements.
... collapse collapse wrap remove nowrap collapse collapse no wrap remove pre preserve preserve no wrap preserve pre-wrap preserve preserve wrap hang pre-line preserve collapse wrap remove break-spaces preserve preserve wrap wrap formal definition initial valuenormalapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax normal | pre | nowrap | pre-wrap | pre-line | break-spaces examples basic example code { white-space: pre; } line breaks inside <pre> elements pre { word-wrap: break-word; /* ie 5.5-7 */ white-space: pre-wrap; /* modern browsers */ } in action html <div id="css-code" class="box"> p { white-spac...
regexp:match() - EXSLT
Web › EXSLT › regexp › match
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes regexp:match() performs regular expression matching on a string, returning the submatches found as a result.
... returns a node set of match elements, each of which has the string value equal to a portion of the first parameter string as captured by the regular expression.
... if the match isn't a global one, the first match element has the value of the portion of the string matched by the entire regular expression.
Challenge solutions - Developer guides
Web › Guide › CSS › Getting Started › Challenge solutions
solution add a rule to the body element (parent of the headings) to reset a new counter, and one to display and increment the counter on the headings: /* numbered headings */ body {counter-reset: headnum;} h3:before { content: "(" counter(headnum, upper-latin) ") "; counter-increment: headnum; } boxes ocean border challenge add one rule to your stylesheet, making a wide border all around the oceans in a color that remin...
... solution the following rule puts borders around only <td> elements that are inside the <tbody> element of the table with id=demo-table: #demo-table tbody td { border:1px solid #7a7; } media separate print style file challenge move the print-specific style rules to a separate css file and import them into your style4.css stylesheet.
...the following script achieves the desired result: // javascript demonstration function dodemo (button) { var square = document.getelementbyid("square"); square.style.backgroundcolor = "#fa4"; square.style.marginleft = "20em"; button.setattribute("disabled", "true"); settimeout(cleardemo, 2000, button); } function cleardemo (button) { var square = document.getelementbyid("square"); square.style.backgroundcolor = "transparent"; square.style.marginleft = "0em"; button.removeattribute("disabled"); } svg and css ...
Printing - Developer guides
Web › Guide › Printing
you can use this to adjust the user interface presented during printing (such as by displaying or hiding user interface elements during the print process).
...you can also try changing the code to use <code>beforeprint</code> to see the difference.</p> <p><a href="javascript: popuponclick()">open popup window</a></p> </body> </html> view live examples print an external page without opening it if you want to be able to print an external page without opening it, you can utilize a hidden <iframe> (see: htmliframeelement), automatically removing it after the user prints its contents.
...t/javascript"> function closeprint () { document.body.removechild(this.__container__); } function setprint () { this.contentwindow.__container__ = this; this.contentwindow.onbeforeunload = closeprint; this.contentwindow.onafterprint = closeprint; this.contentwindow.focus(); // required for ie this.contentwindow.print(); } function printpage (surl) { var ohiddframe = document.createelement("iframe"); ohiddframe.onload = setprint; ohiddframe.style.position = "fixed"; ohiddframe.style.right = "0"; ohiddframe.style.bottom = "0"; ohiddframe.style.width = "0"; ohiddframe.style.height = "0"; ohiddframe.style.border = "0"; ohiddframe.src = surl; document.body.appendchild(ohiddframe); } </script> </head> <body> <p><span onclick="printpage('externalpage.html');" style="...
Date and time formats used in HTML - HTML: Hypertext Markup Language
Web › HTML › Date and time formats
certain html elements use date and/or time values.
...elements that use such formats include certain forms of the <input> element that let the user choose or specify a date, time, or both, as well as the <ins> and <del> elements, whose datetime attribute specifies the date or date and time at which the insertion or deletion of content occurred.
..., 33 [details] 1977-04-01t14:00:30 30 seconds after 2:00 pm on april 1, 1977 [details] 1901-01-01t00:00z midnight utc on january 1, 1901 [details] 1901-01-01t00:00:01-04:00 1 second past midnight eastern standard time (est) on january 1, 1901 [details] basics before looking at the various formats of date and time related strings used by html elements, it is helpful to understand a few fundamental facts about the way they're defined.
<input type="hidden"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › hidden
<input> elements of type hidden let web developers include data that cannot be seen or modified by users when a form is submitted.
... value the <input> element's value attribute holds a domstring that contains the hidden data you want to include when the form is submitted to the server.
... additional attributes in addition to the attributes common to all <input> elements, hidden inputs offer the following attributes: attribute description name like all input types, the name of the input to report when submitting the form; the special value _charset_ causes the hidden input's value to be reported as the character encoding used to submit the form name this is actually one of the common attributes, but it has a special meaning a...
<input type="reset"> - HTML: Hypertext Markup Language
Web › HTML › Element › input › reset
<input> elements of type "reset" are rendered as buttons, with a default click event handler that resets all of the inputs in the form to their initial values.
... value a domstring used as the button's label events click supported common attributes type and value idl attributes value methods none value an <input type="reset"> element's value attribute contains a domstring that is used as the button's label.
...if you want to create a custom button and then customize the behaviour using javascript, you need to use <input type="button">, or better still, a <button> element.
<ruby> - HTML: Hypertext Markup Language
Web › HTML › Element › ruby
the html <ruby> element represents a ruby annotation.
... permitted parents any element that accepts phrasing content.
... implicit aria role no corresponding role permitted aria roles any dom interface htmlelement attributes this element only includes the global attributes.
<strike> - HTML: Hypertext Markup Language
Web › HTML › Element › strike
the html <strike> element (or html strikethrough element) places a strikethrough (horizontal line) over text.
... usage note: this element is deprecated in html 4 and xhtml 1, and obsoleted in html5.
... dom interface htmlelement attributes this element includes the global attributes.
contextmenu - HTML: Hypertext Markup Language
Web › HTML › Global attributes › contextmenu
the contextmenu attribute is obsolete and will be removed from all browsers the contextmenu global attribute is the id of a <menu> to use as the contextual menu for this element.
... </li> <li contextmenu="changefont" id="fontsizing"> on this specific list element, you can change the size of the text by using the "increase/decrease font" actions from your context menu </li> <menu type="context" id="changefont"> <menuitem label="increase font" onclick="incfont()"></menuitem> <menuitem label="decrease font" onclick="decfont()"></menuitem> </menu> <li contextmenu="changeimage" id="changeimage"> on the image below, you c...
...i am learning contextmenu from mdn via mozilla"); } function shareviafacebook() { window.open("https://facebook.com/sharer/sharer.php?u=" + "https://developer.mozilla.org/en/html/element/using_html_context_menus"); } function incfont() { document.getelementbyid("fontsizing").style.fontsize = "larger"; } function decfont() { document.getelementbyid("fontsizing").style.fontsize = "smaller"; } function changeimage() { var index = math.ceil(math.random() * 39 + 1); document.images[0].src = "https://developer.mozilla.org/media/img/promote/promobutton_mdn" + inde...
dropzone - HTML: Hypertext Markup Language
Web › HTML › Global attributes › dropzone
the dropzone global attribute is an enumerated attribute indicating what types of content can be dropped on an element, using the html drag and drop api.
... it can have the following values: copy, which indicates that dropping will create a copy of the element that was dragged.
... move, which indicates that the element that was dragged will be moved to this new location.
id - HTML: Hypertext Markup Language
Web › HTML › Global attributes › id
its purpose is to identify the element when linking (using a fragment identifier), scripting, or styling (with css).
...in contrast to the class attribute, which allows space-separated values, elements can only have one single id value.
... recommendation supported on all elements but <base>, <head>, <html>, <meta>, <script>, <style>, and <title>.
itemtype - HTML: Hypertext Markup Language
Web › HTML › Global attributes › itemtype
the itemtype attribute can only be specified on elements which have an itemscope attribute specified.
... the itemid attribute can only be specified on elements which have both an itemscope attribute and an itemtype attribute specified.
... they must only be specified on elements with an itemscope attribute, whose itemtype attribute specifies a vocabulary not supporting global identifiers for items, as defined by that vocabulary's specification.
style - HTML: Hypertext Markup Language
Web › HTML › Global attributes › style
the style global attribute contains css styling declarations to be applied to the element.
...this attribute and the <style> element have mainly the purpose of allowing for quick styling, for example for testing purposes.
... recommendation supported on all elements but <base>, <basefont>, <head>, <html>, <meta>, <param>, <script>, <style>, and <title>.
translate - HTML: Hypertext Markup Language
Web › HTML › Global attributes › translate
the translate global attribute is an enumerated attribute that is used to specify whether an element's translateable attribute values and its text node children should be translated when the page is localized, or whether to leave them unchanged.
... it can have the following values: empty string or "yes", which indicates that the element should be translated when the page is localized.
... "no", which indicates that the element must not be translated.
Using the application cache - HTML: Hypertext Markup Language
Web › HTML › Using the application cache
how the application cache works enabling the application cache to enable the application cache for an application, include the manifest attribute in the <html> element: <html manifest="/example.appcache"> … </html> the manifest attribute references a url for a cache manifest file: a text file that lists urls that browsers should cache for your application.
... master entries master entries are any html files that include a manifest attribute in their <html> element.
... note: simply omitting master entries (files that have the manifest attribute set in the html element) from the manifest file would not have the same result, because master entries will be added—and subsequently served from—the application cache.
Browser detection using the user agent - HTTP
Web › HTTP › Browser detection using the user agent
can you prevent it by adding some non-semantic <div> or <span> elements?
...ndow) { hastouchscreen = true; // deprecated, but good fallback } else { // only as a last resort, fall back to user agent sniffing var ua = navigator.useragent; hastouchscreen = ( /\b(blackberry|webos|iphone|iemobile)\b/i.test(ua) || /\b(android|windows phone|ipad|ipod)\b/i.test(ua) ); } } if (hastouchscreen) document.getelementbyid("examplebutton").style.padding="1em"; as for the screen size, simply use window.innerwidth and window.addeventlistener("resize", function(){ /*refresh screen size dependent things*/ }).
...from this point on, we shall assume that all the dog boxes are at the top of the source code, that all the cat boxes are at the bottom of the source code, and that all these boxes have the same parent element.
Configuring servers for Ogg media - HTTP
Web › HTTP › Configuring servers for Ogg media
html <audio> and <video> elements allow media presentation without the need for the user to install any plug-ins or other software to do so.
... consider using the preload attribute the html <audio> and <video> elements provide the preload attribute, which tells the browser to attempt to download the entire media when the page loads.
... preload is off by default, so if getting to video is the point of your web page, your users may appreciate it if you include preload in your video elements.
Content negotiation - HTTP
Web › HTTP › Content negotiation
html5 provides alternatives to content negotiation via, for example, the <source> element.
... the accept header is defined by the browser, or any other user-agent, and can vary according to the context, like fetching an html page or an image, a video, or a script: it is different when fetching a document entered in the address bar or an element linked via an <img>, <video> or <audio> element.
...obviously, the wildcard '*' prevents caching from occurring, as the cache cannot know what element is behind it.
CSP: child-src - HTTP
Web › HTTP › Headers › Content-Security-Policy › child-src
the http content-security-policy (csp) child-src directive defines the valid sources for web workers and nested browsing contexts loaded using elements such as <frame> and <iframe>.
...if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method compared to using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
CSP: form-action - HTTP
Web › HTTP › Headers › Content-Security-Policy › form-action
if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method than using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
... examples meta tag configuration <meta http-equiv="content-security-policy" content="form-action 'none'"> apache configuration <ifmodule mod_headers.c> header set content-security-policy "form-action 'none'; </ifmodule> nginx configuration add_header content-security-policy "form-action 'none';" violation case using a <form> element with an action set to inline javascript will result in a csp violation.
CSP: frame-src - HTTP
Web › HTTP › Headers › Content-Security-Policy › frame-src
the http content-security-policy (csp) frame-src directive specifies valid sources for nested browsing contexts loading using elements such as <frame> and <iframe>.
...if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method compared to using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
CSP: navigate-to - HTTP
Web › HTTP › Headers › Content-Security-Policy › navigate-to
if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method than using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
... examples meta tag configuration <meta http-equiv="content-security-policy" content="navigate-to 'none'"> violation case using a <form> element with an action set to inline javascript will result in a csp violation.
CSP: script-src-attr - HTTP
Web › HTTP › Headers › Content-Security-Policy › script-src-attr
this includes only inline script event handlers like onclick, but not urls loaded directly into <script> elements.
...if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method than using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
CSP: script-src-elem - HTTP
Web › HTTP › Headers › Content-Security-Policy › script-src-elem
the http content-security-policy (csp) script-src-elem directive specifies valid sources for javascript <script> elements, but not inline script event handlers like onclick.
...if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method than using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
CSP: style-src-attr - HTTP
Web › HTTP › Headers › Content-Security-Policy › style-src-attr
the http content-security-policy (csp) style-src-attr directive specifies valid sources for inline styles applied to individual dom elements.
...if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method than using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
CSP: style-src-elem - HTTP
Web › HTTP › Headers › Content-Security-Policy › style-src-elem
the http content-security-policy (csp) style-src-elem directive specifies valid sources for stylesheets <style> elements and <link> elements with rel="stylesheet".
...if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method than using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
Feature-Policy: autoplay - HTTP
Web › HTTP › Headers › Feature-Policy › autoplay
the http feature-policy header autoplay directive controls whether the current document is allowed to autoplay media requested through the htmlmediaelement interface.
... when this policy is enabled and there were no user gestures, the promise returned by htmlmediaelement.play() will reject with a domexception.
... the autoplay attribute on <audio> and <video> elements will be ignored.
X-DNS-Prefetch-Control - HTTP
Web › HTTP › Headers › X-DNS-Prefetch-Control
examples turning on and off prefetching you can either send the x-dns-prefetch-control header server-side, or from individual documents, using the http-equiv attribute on the <meta> element, like this: <meta http-equiv="x-dns-prefetch-control" content="off"> you can reverse this setting by setting content to "on".
... forcing lookup of specific hostnames you can force the lookup of specific hostnames without providing specific anchors using that hostname by using the rel attribute on the <link> element with a link type of dns-prefetch: <link rel="dns-prefetch" href="https://www.mozilla.org/contribute/"> in this example, the domain name "www.mozilla.org/contribute" will be pre-resolved.
... similarly, the link element can be used to resolve hostnames without providing a complete url, but only, by preceding the hostname with two slashes: <link rel="dns-prefetch" href="//www.mozilla.org/contribute/"> forced prefetching of hostnames might be useful, for example, on the homepage of a site to force pre-resolution of domain names that are referenced frequently throughout the site even though they are not used on the home page itself.
An overview of HTTP - HTTP
Web › HTTP › Overview
requests an example http request: requests consists of the following elements: an http method, usually a verb like get, post or a noun like options or head that defines the operation the client wants to perform.
... the path of the resource to fetch; the url of the resource stripped from elements that are obvious from the context, for example without the protocol (http://), the domain (here, developer.mozilla.org), or the tcp port (here, 80).
... responses an example response: responses consist of the following elements: the version of the http protocol they follow.
A re-introduction to JavaScript (JS tutorial) - JavaScript
Web › JavaScript › A re-introduction to JavaScript
count, you can iterate over an array using the following for loop: for (var i = 0; i < a.length; i++) { // do something with a[i] } es2015 introduced the more concise for...of loop for iterable objects such as arrays: for (const currentvalue of a) { // do something with currentvalue } you could also iterate over an array using a for...in loop, however this does not iterate over the array elements, but the array indices.
... method name description a.tostring() returns a string with the tostring() of each element separated by commas.
... a.tolocalestring() returns a string with the tolocalestring() of each element separated by commas.
Arrow function expressions - JavaScript
Web › JavaScript › Reference › Functions › Arrow functions
shorter functions var elements = [ 'hydrogen', 'helium', 'lithium', 'beryllium' ]; // this statement returns the array: [8, 6, 7, 9] elements.map(function(element) { return element.length; }); // the regular function above can be written as the arrow function below elements.map((element) => { return element.length; }); // [8, 6, 7, 9] // when there is only one parameter, we can remove the surrounding parenthese...
...s elements.map(element => { return element.length; }); // [8, 6, 7, 9] // when the only statement in an arrow function is `return`, we can remove `return` and remove // the surrounding curly brackets elements.map(element => element.length); // [8, 6, 7, 9] // in this case, because we only need the length property, we can use destructuring parameter: // notice that the `length` corresponds to the property we want to get whereas the // obviously non-special `lengthfoobarx` is just the name of a variable which can be changed // to any valid variable name you want elements.map(({ length: lengthfoobarx }) => lengthfoobarx); // [8, 6, 7, 9] // this destructuring parameter assignment can also be written as seen below.
...elements.map(({ length }) => length); // [8, 6, 7, 9] no separate this before arrow functions, every new function defined its own this value based on how the function was called: a new object in the case of a constructor.
Array() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › Array › Array
syntax [element0, element1, ..., elementn] new array(element0, element1[, ...[, elementn]]) new array(arraylength) parameters elementn a javascript array is initialized with the given elements, except in the case where a single argument is passed to the array constructor and that argument is a number (see the arraylength parameter below).
...an array with its length property set to that number and the array elements are empty slots.
... let fruits = new array(2); console.log(fruits.length); // 2 console.log(fruits[0]); // undefined array constructor with multiple parameters if more than one argument is passed to the constructor, a new array with the given elements is created.
Array.prototype.toString() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › toString
the tostring() method returns a string representing the specified array and its elements.
... syntax arr.tostring() return value a string representing the elements of the array.
...for array objects, the tostring method joins the array and returns one string containing each array element separated by commas.
Array.prototype.unshift() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › unshift
the unshift() method adds one or more elements to the beginning of an array and returns the new length of the array.
... syntax arr.unshift(element1[, ...[, elementn]]) parameters elementn the elements to add to the front of the arr.
... please note that, if multiple elements are passed as parameters, they're inserted in chunk at the beginning of the object, in the exact same order they were passed as parameters.
BigInt64Array() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › BigInt64Array › BigInt64Array
once established, you can reference elements in the array using the object's methods, or by using standard array index syntax (that is, using bracket notation).
... syntax new bigint64array(); new bigint64array(length); new bigint64array(typedarray); new bigint64array(object); new bigint64array(buffer [, byteoffset [, length]]); parameters length when called with a length argument, an internal array buffer is created in memory, of size length multiplied by bytes_per_element bytes, containing zeros.
... examples different ways to create a bigint64array // from a length var bigint64 = new bigint64array(2); bigint64[0] = 42n; console.log(bigint64[0]); // 42n console.log(bigint64.length); // 2 console.log(bigint64.bytes_per_element); // 8 // from an array var arr = new bigint64array([21n,31n]); console.log(arr[1]); // 31n // from another typedarray var x = new bigint64array([21n, 31n]); var y = new bigint64array(x); console.log(y[0]); // 21n // from an arraybuffer var buffer = new arraybuffer(32); var z = new bigint64array(buffer, 0, 4); // from an iterable var iterable = function*(){ yield* [1n, 2n, 3n]; }(); var bigin...
BigUint64Array() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › BigUint64Array › BigUint64Array
once established, you can reference elements in the array using the object's methods, or by using standard array index syntax (that is, using bracket notation).
... syntax new biguint64array(); new biguint64array(length); new biguint64array(typedarray); new biguint64array(object); new biguint64array(buffer [, byteoffset [, length]]); parameters length when called with a length argument, an internal array buffer is created in memory, of size length multiplied by bytes_per_element bytes, containing zeros.
... examples different ways to create a biguint64array // from a length var biguint64 = new biguint64array(2); biguint64[0] = 42n; console.log(biguint64[0]); // 42n console.log(biguint64.length); // 2 console.log(biguint64.bytes_per_element); // 8 // from an array var arr = new biguint64array([21n,31n]); console.log(arr[1]); // 31n // from another typedarray var x = new biguint64array([21n, 31n]); var y = new biguint64array(x); console.log(y[0]); // 21n // from an arraybuffer var buffer = new arraybuffer(32); var z = new biguint64array(buffer, 0, 4); // from an iterable var iterable = function*(){ yield* [1n, 2n, 3n]; }(); var b...
Float32Array() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › Float32Array › Float32Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... syntax new float32array(); // new in es2017 new float32array(length); new float32array(typedarray); new float32array(object); new float32array(buffer [, byteoffset [, length]]); parameters length when called with a length argument, an internal array buffer is created in memory, of size length multiplied by bytes_per_element bytes, containing zeros.
... examples different ways to create a float32array // from a length var float32 = new float32array(2); float32[0] = 42; console.log(float32[0]); // 42 console.log(float32.length); // 2 console.log(float32.bytes_per_element); // 4 // from an array var arr = new float32array([21,31]); console.log(arr[1]); // 31 // from another typedarray var x = new float32array([21, 31]); var y = new float32array(x); console.log(y[0]); // 21 // from an arraybuffer var buffer = new arraybuffer(16); var z = new float32array(buffer, 0, 4); // from an iterable var iterable = function*(){ yield* [1,2,3]; }(); var float32 = new float3...
Float64Array() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › Float64Array › Float64Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... syntax new float64array(); // new in es2017 new float64array(length); new float64array(typedarray); new float64array(object); new float64array(buffer [, byteoffset [, length]]); parameters length when called with a length argument, an internal array buffer is created in memory, of size length multiplied by bytes_per_element bytes, containing zeros.
... examples different ways to create a float64array // from a length var float64 = new float64array(2); float64[0] = 42; console.log(float64[0]); // 42 console.log(float64.length); // 2 console.log(float64.bytes_per_element); // 8 // from an array var arr = new float64array([21,31]); console.log(arr[1]); // 31 // from another typedarray var x = new float64array([21, 31]); var y = new float64array(x); console.log(y[0]); // 21 // from an arraybuffer var buffer = new arraybuffer(32); var z = new float64array(buffer, 0, 4); // from an iterable var iterable = function*(){ yield* [1,2,3]; }(); var float64 = new float6...
Int16Array() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › Int16Array › Int16Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... syntax new int16array(); // new in es2017 new int16array(length); new int16array(typedarray); new int16array(object); new int16array(buffer [, byteoffset [, length]]); parameters length when called with a length argument, an internal array buffer is created in memory, of size length multiplied by bytes_per_element bytes, containing zeros.
... examples different ways to create an int16array // from a length var int16 = new int16array(2); int16[0] = 42; console.log(int16[0]); // 42 console.log(int16.length); // 2 console.log(int16.bytes_per_element); // 2 // from an array var arr = new int16array([21,31]); console.log(arr[1]); // 31 // from another typedarray var x = new int16array([21, 31]); var y = new int16array(x); console.log(y[0]); // 21 // from an arraybuffer var buffer = new arraybuffer(8); var z = new int16array(buffer, 0, 4); // from an iterable var iterable = function*(){ yield* [1,2,3]; }(); var int16 = new int16array(iterab...
Int32Array() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › Int32Array › Int32Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... syntax new int32array(); // new in es2017 new int32array(length); new int32array(typedarray); new int32array(object); new int32array(buffer [, byteoffset [, length]]); parameters length when called with a length argument, an internal array buffer is created in memory, of size length multiplied by bytes_per_element bytes, containing zeros.
... examples different ways to create an int32array // from a length var int32 = new int32array(2); int32[0] = 42; console.log(int32[0]); // 42 console.log(int32.length); // 2 console.log(int32.bytes_per_element); // 4 // from an array var arr = new int32array([21,31]); console.log(arr[1]); // 31 // from another typedarray var x = new int32array([21, 31]); var y = new int32array(x); console.log(y[0]); // 21 // from an arraybuffer var buffer = new arraybuffer(16); var z = new int32array(buffer, 0, 4); // from an iterable var iterable = function*(){ yield* [1,2,3]; }(); var int32 = new int32array(itera...
Int8Array() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › Int8Array › Int8Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... syntax new int8array(); // new in es2017 new int8array(length); new int8array(typedarray); new int8array(object); new int8array(buffer [, byteoffset [, length]]); parameters length when called with a length argument, an internal array buffer is created in memory, of size length multiplied by bytes_per_element bytes, containing zeros.
... examples different ways to create an int8array // from a length var int8 = new int8array(2); int8[0] = 42; console.log(int8[0]); // 42 console.log(int8.length); // 2 console.log(int8.bytes_per_element); // 1 // from an array var arr = new int8array([21,31]); console.log(arr[1]); // 31 // from another typedarray var x = new int8array([21, 31]); var y = new int8array(x); console.log(y[0]); // 21 // from an arraybuffer var buffer = new arraybuffer(8); var z = new int8array(buffer, 1, 4); // from an iterable var iterable = function*(){ yield* [1,2,3]; }(); var int8 = new int8array(iterable); /...
Intl​.List​Format​.prototype​.formatToParts() - JavaScript
Web › JavaScript › Reference › Global Objects › Intl › ListFormat › formatToParts
each element of the resulting array has two properties: type and value.
... the type property may be either "element", which refers to a value from the list, or "literal" which refers to a linguistic construct.
... examples using formattoparts const fruits = ['apple', 'orange', 'pineapple']; const mylistformat = new intl.listformat('en-gb', { style: 'long', type: 'conjunction' }); console.table(mylistformat.formattoparts(fruits)); // [ // { "type": "element", "value": "apple" }, // { "type": "literal", "value": ", " }, // { "type": "element", "value": "orange" }, // { "type": "literal", "value": ", and " }, // { "type": "element", "value": "pineapple" } // ] specifications specification intl.listformatthe definition of 'formattoparts()' in that specification.
Map.prototype.get() - JavaScript
Web › JavaScript › Reference › Global Objects › Map › get
the get() method returns a specified element from a map object.
... syntax mymap.get(key) parameters key the key of the element to return from the map object.
... return value the element associated with the specified key, or undefined if the key can't be found in the map object.
Map.prototype.has() - JavaScript
Web › JavaScript › Reference › Global Objects › Map › has
the has() method returns a boolean indicating whether an element with the specified key exists or not.
... syntax mymap.has(key) parameters key the key of the element to test for presence in the map object.
... return value true if an element with the specified key exists in the map object; otherwise false.
Math.max() - JavaScript
Web › JavaScript › Reference › Global Objects › Math › max
examples using math.max() math.max(10, 20); // 20 math.max(-10, -20); // -10 math.max(-10, 20); // 20 getting the maximum element of an array array.reduce() can be used to find the maximum element in a numeric array, by comparing each value: var arr = [1,2,3]; var max = arr.reduce(function(a, b) { return math.max(a, b); }); the following function uses function.prototype.apply() to get the maximum of an array.
...this should only be used for arrays with relatively few elements.
... function getmaxofarray(numarray) { return math.max.apply(null, numarray); } the new spread operator is a shorter way of writing the apply solution to get the maximum of an array: var arr = [1, 2, 3]; var max = math.max(...arr); however, both spread (...) and apply will either fail or return the wrong result if the array has too many elements, because they try to pass the array elements as function parameters.
Object.freeze() - JavaScript
Web › JavaScript › Reference › Global Objects › Object › freeze
as an object, an array can be frozen; after doing so, its elements cannot be altered and no elements can be added to or removed from the array.
... > object.freeze(1) typeerror: 1 is not an object // es5 code > object.freeze(1) 1 // es2015 code an arraybufferview with elements will cause a typeerror, as they are views over memory and will definitely cause other possible issues: > object.freeze(new uint8array(0)) // no elements uint8array [] > object.freeze(new uint8array(1)) // has elements typeerror: cannot freeze array buffer views with elements > object.freeze(new dataview(new arraybuffer(32))) // no elements dataview {} > object.freeze(new float64array(new arr...
...aybuffer(64), 63, 0)) // no elements float64array [] > object.freeze(new float64array(new arraybuffer(64), 32, 2)) // has elements typeerror: cannot freeze array buffer views with elements note that; as the standard three properties (buf.bytelength, buf.byteoffset and buf.buffer) are read-only (as are those of an arraybuffer or sharedarraybuffer), there is no reason for attempting to freeze these properties.
Proxy - JavaScript
Web › JavaScript › Reference › Global Objects › Proxy
const target = {}; const p = new proxy(target, {}); p.a = 37; // operation forwarded to the target console.log(target.a); // 37 // (the operation has been properly forwarded!) note that while this "no-op" works for javascript objects, it does not work for native browser objects like dom elements.
...; } var person = function(name) { this.name = name; }; var boy = extend(person, function(name, age) { this.age = age; }); boy.prototype.gender = 'm'; var peter = new boy('peter', 13); console.log(peter.gender); // "m" console.log(peter.name); // "peter" console.log(peter.age); // 13 manipulating dom nodes sometimes you want to toggle the attribute or class name of two different elements.
...ewval) { let oldval = obj[prop]; if (prop === 'selected') { if (oldval) { oldval.setattribute('aria-selected', 'false'); } if (newval) { newval.setattribute('aria-selected', 'true'); } } // the default behavior to store the value obj[prop] = newval; // indicate success return true; } }); let i1 = view.selected = document.getelementbyid('item-1'); //giving error here, i1 is null console.log(i1.getattribute('aria-selected')); // 'true' let i2 = view.selected = document.getelementbyid('item-2'); console.log(i1.getattribute('aria-selected')); // 'false' console.log(i2.getattribute('aria-selected')); // 'true' note: even if selected: !null, then giving oldval.setattribute is not a function value correction and an extra p...
Set.prototype.delete() - JavaScript
Web › JavaScript › Reference › Global Objects › Set › delete
the delete() method removes the specified element from a set object.
...no "bar" element found to be deleted.
...the "foo" element is no longer present.
Set.prototype.has() - JavaScript
Web › JavaScript › Reference › Global Objects › Set › has
the has() method returns a boolean indicating whether an element with the specified value exists in a set object or not.
... return value returns true if an element with the specified value exists in the set object; otherwise false.
... note: technically speaking, has() uses the samevaluezero algorithm to determine whether the given element is found.
Set.prototype.values() - JavaScript
Web › JavaScript › Reference › Global Objects › Set › values
the values() method returns a new iterator object that contains the values for each element in the set object in insertion order.
... the keys() method is an alias for this method (for similarity with map objects); it behaves exactly the same and returns values of set elements.
... syntax myset.values(); return value a new iterator object containing the values for each element in the given set, in insertion order.
String.prototype.blink() - JavaScript
Web › JavaScript › Reference › Global Objects › String › blink
the blink() method creates a <blink> html element that causes a string to blink.
...the <blink> element itself is non-standard and deprecated!
... syntax str.blink() return value a string containing a <blink> html element.
String.prototype.small() - JavaScript
Web › JavaScript › Reference › Global Objects › String › small
the small() method creates a <small> html element that causes a string to be displayed in a small font.
... syntax str.small() return value a string containing a <small> html element.
... examples using small() the following example uses string methods to change the size of a string: var worldstring = 'hello, world'; console.log(worldstring.small()); // <small>hello, world</small> console.log(worldstring.big()); // <big>hello, world</big> console.log(worldstring.fontsize(7)); // <font size="7">hello, world</fontsize> with the element.style object you can get the element's style attribute and manipulate it more generically, for example: document.getelementbyid('yourelemid').style.fontsize = '0.7em'; specifications specification ecmascript (ecma-262)the definition of 'string.prototype.small' in that specification.
TypedArray.prototype.includes() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › includes
the includes() method determines whether a typed array includes a certain element, returning true or false as appropriate.
... syntax typedarray.includes(searchelement[, fromindex]); parameters searchelement the element to search for.
...the position in this array at which to begin searching for searchelement; defaults to 0.
TypedArray.prototype.toString() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › toString
the tostring() method returns a string representing the specified array and its elements.
... syntax typedarray.tostring() return value a string representing the elements of the typed array.
...for typedarray objects, the tostring method joins the array and returns one string containing each typed array element separated by commas.
Uint16Array() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › Uint16Array › Uint16Array
syntax new uint16array(); // new in es2017 new uint16array(length); new uint16array(typedarray); new uint16array(object); new uint16array(buffer [, byteoffset [, length]]); parameters length when called with a length argument, an internal array buffer is created in memory, of size length multiplied by bytes_per_element bytes, containing zeros.
...once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... var dv = uint16array([1, 2, 3]); // typeerror: calling a builtin uint16array constructor // without new is forbidden var dv = new uint16array([1, 2, 3]); examples different ways to create a uint16array // from a length var uint16 = new uint16array(2); uint16[0] = 42; console.log(uint16[0]); // 42 console.log(uint16.length); // 2 console.log(uint16.bytes_per_element); // 2 // from an array var arr = new uint16array([21,31]); console.log(arr[1]); // 31 // from another typedarray var x = new uint16array([21, 31]); var y = new uint16array(x); console.log(y[0]); // 21 // from an arraybuffer var buffer = new arraybuffer(8); var z = new uint16array(buffer, 0, 4); // from an iterable var iterable = function*(){ yield* [1,2,3]; }(); var uint16 = new uint16array(...
Uint32Array() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › Uint32Array › Uint32Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... syntax new uint32array(); // new in es2017 new uint32array(length); new uint32array(typedarray); new uint32array(object); new uint32array(buffer [, byteoffset [, length]]); parameters length when called with a length argument, an internal array buffer is created in memory, of size length multiplied by bytes_per_element bytes, containing zeros.
... examples different ways to create a uint32array // from a length var uint32 = new uint32array(2); uint32[0] = 42; console.log(uint32[0]); // 42 console.log(uint32.length); // 2 console.log(uint32.bytes_per_element); // 4 // from an array var arr = new uint32array([21,31]); console.log(arr[1]); // 31 // from another typedarray var x = new uint32array([21, 31]); var y = new uint32array(x); console.log(y[0]); // 21 // from an arraybuffer var buffer = new arraybuffer(16); var z = new uint32array(buffer, 0, 4); // from an iterable var iterable = function*(){ yield* [1,2,3]; }(); var uint32 = new uint32array...
Uint8Array() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › Uint8Array › Uint8Array
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... syntax new uint8array(); // new in es2017 new uint8array(length); new uint8array(typedarray); new uint8array(object); new uint8array(buffer [, byteoffset [, length]]); parameters length when called with a length argument, an internal array buffer is created in memory, of size length multiplied by bytes_per_element bytes, containing zeros.
... examples different ways to create a uint8array // from a length var uint8 = new uint8array(2); uint8[0] = 42; console.log(uint8[0]); // 42 console.log(uint8.length); // 2 console.log(uint8.bytes_per_element); // 1 // from an array var arr = new uint8array([21,31]); console.log(arr[1]); // 31 // from another typedarray var x = new uint8array([21, 31]); var y = new uint8array(x); console.log(y[0]); // 21 // from an arraybuffer var buffer = new arraybuffer(8); var z = new uint8array(buffer, 1, 4); // from an iterable var iterable = function*(){ yield* [1,2,3]; }(); var uint8 = new uint8array(iterab...
Uint8ClampedArray() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › Uint8ClampedArray › Uint8ClampedArray
once established, you can reference elements in the array using the object's methods, or using standard array index syntax (that is, using bracket notation).
... syntax new uint8clampedarray(); // new in es2017 new uint8clampedarray(length); new uint8clampedarray(typedarray); new uint8clampedarray(object); new uint8clampedarray(buffer [, byteoffset [, length]]); parameters length when called with a length argument, an internal array buffer is created in memory, of size length multiplied by bytes_per_element bytes, containing zeros.
... examples different ways to create a uint8clampedarray // from a length var uintc8 = new uint8clampedarray(2); uintc8[0] = 42; uintc8[1] = 1337; console.log(uintc8[0]); // 42 console.log(uintc8[1]); // 255 (clamped) console.log(uintc8.length); // 2 console.log(uintc8.bytes_per_element); // 1 // from an array var arr = new uint8clampedarray([21,31]); console.log(arr[1]); // 31 // from another typedarray var x = new uint8clampedarray([21, 31]); var y = new uint8clampedarray(x); console.log(y[0]); // 21 // from an arraybuffer var buffer = new arraybuffer(8); var z = new uint8clampedarray(buffer, 1, 4); // from an iterable var iterable = function*(){ yield* [1,2,3]; }(); var u...
WeakMap.prototype.delete() - JavaScript
Web › JavaScript › Reference › Global Objects › WeakMap › delete
the delete() method removes the specified element from a weakmap object.
... syntax wm.delete(key); parameters key the key of the element to remove from the weakmap object.
... return value true if an element in the weakmap object has been removed successfully.
WeakMap.prototype.get() - JavaScript
Web › JavaScript › Reference › Global Objects › WeakMap › get
the get() method returns a specified element from a weakmap object.
...the key of the element to return from the weakmap object.
... return value the element associated with the specified key in the weakmap object.
WeakMap.prototype.has() - JavaScript
Web › JavaScript › Reference › Global Objects › WeakMap › has
the has() method returns a boolean indicating whether an element with the specified key exists in the weakmap object or not.
...the key of the element to test for presence in the weakmap object.
... return value boolean returns true if an element with the specified key exists in the weakmap object; otherwise false.
WebAssembly.Table.prototype.grow() - JavaScript
Web › JavaScript › Reference › Global Objects › WebAssembly › Table › grow
the grow() prototype method of the webassembly.table object increases the size of the table instance by a specified number of elements.
... syntax table.grow(number); parameters number the number of elements you want to grow the table by.
... var table = new webassembly.table({ element: "anyfunc", initial: 2, maximum: 10 }); you can then grow the table by 1 with the following: console.log(table.length); // "2" console.log(table.grow(1)); // "2" console.log(table.length); // "3" specifications specification webassembly javascript interfacethe definition of 'grow()' in that specification.
Comma operator (,) - JavaScript
Web › JavaScript › Reference › Operators › Comma Operator
examples if a is a 2-dimensional array with 10 elements on each side, the following code uses the comma operator to increment i and decrement j at once.
... the following code prints the values of the diagonal elements in the array: for (var i = 0, j = 9; i <= 9; i++, j--) console.log('a[' + i + '][' + j + '] = ' + a[i][j]); note that the comma operators in assignments may appear not to have the normal effect of comma operators because they don't exist within an expression.
...as stated, only the last element will be returned but all others are going to be evaluated as well.
Spread syntax (...) - JavaScript
Web › JavaScript › Reference › Operators › Spread syntax
spread syntax (...) allows an iterable such as an array expression or string to be expanded in places where zero or more arguments (for function calls) or elements (for array literals) are expected, or an object expression to be expanded in places where zero or more key-value pairs (for object literals) are expected.
...spread syntax "expands" an array into its elements, while rest syntax collects multiple elements and "condenses" them into a single element.
... examples spread in function calls replace apply() it is common to use function.prototype.apply() in cases where you want to use the elements of an array as arguments to a function.
display - Web app manifests
Web › Manifest › display
in this mode, the user agent will exclude ui elements for controlling navigation, but can include other ui elements such as a status bar.
... minimal-ui minimal-ui the application will look and feel like a standalone application, but will have a minimal set of ui elements for controlling navigation.
... the elements will vary by browser.
<mlabeledtr> - MathML
Web › MathML › Element › mlabeledtr
the mathml <mlabeledtr> element is used to represent a label in a row either on the left or on the right side (determined using the side attribute on the <mtable> element).
... child elements of <mlabeledtr> must be <mtd> elements.
... the first child is the label whereas all other children are representing row contents and are treated identically to children of <mtr> elements.
<mrow> - MathML
Web › MathML › Element › mrow
the mathml <mrow> element is used to group sub-expressions, which usually contain one or more operators with their respective operands (such as <mi> and <mn>).
... this element renders as a horizontal row containing its arguments.
... when writing a mathml expression, you should group elements within an <mrow> in the same way as they are grouped in the mathematical interpretation of the expression.
<mstyle> - MathML
Web › MathML › Element › mstyle
the mathml <mstyle> element is used change the style of its children.
... it accepts all attributes of all mathml presentation elements with some exceptions and additional attributes listed below.
... the <mstyle> element accepts all attributes of all presentation elements with the following exceptions: height, depth or width do not apply to <mglyph>, <mpadded> or <mtable>.
<mtd> - MathML
Web › MathML › Element › mtd
the mathml <mtd> element represents a cell in a table or a matrix.
... it may only appear in a <mtr> element.
... this element is similar to the <td> element of html.
<mtr> - MathML
Web › MathML › Element › mtr
the mathml <mtr> element represents a row in a table or a matrix.
... it may only appear in a <mtable> element.
... this element is similar to the <tr> element of html.
<munder> - MathML
Web › MathML › Element › munder
the mathml <munder> element is used to attach an accent or a limit under an expression.
... it uses the following syntax: <munder> base underscript </munder> attributes accentunder if true, the element is an accent, which is drawn closer to the base expression.
... if false (default value), the element is a limit under the base expression.
Progressive web app structure - Progressive web apps (PWAs)
Web › Progressive web apps › App structure
it's different with html, as the browser is actually streaming the data already and you can see when the elements are loaded and rendered on the website.
... the css the css is also as plain as possible: it uses @font-face to load and use a custom font, and it applies some simple styling of the html elements.
...ar entry = template.replace(/pos/g,(i+1)) .replace(/slug/g,games[i].slug) .replace(/name/g,games[i].name) .replace(/author/g,games[i].author) .replace(/twitter/g,games[i].twitter) .replace(/website/g,games[i].website) .replace(/github/g,games[i].github); entry = entry.replace('<a href=\'http:///\'></a>','-'); content += entry; }; document.getelementbyid('content').innerhtml = content; next, it registers a service worker: if('serviceworker' in navigator) { navigator.serviceworker.register('/pwa-examples/js13kpwa/sw.js'); }; the next code block requests permission for notifications when a button is clicked: var button = document.getelementbyid("notifications"); button.addeventlistener('click', function(e) { notification.requestperm...
Progressive loading - Progressive web apps (PWAs)
Web › Progressive web apps › Loading
when you include <img> elements in your html, then every referenced image will be fetched and downloaded during initial website access.
... placeholder image instead of having all the screenshots of games referenced in <img> element src attributes, which will force the browser to download them automatically, we can do it selectively via javascript.
...you could try to make your apps more bulletproof by making them work without javascript — either using <noscript> to show the image with final src already assigned, or by wrapping <img> tags with <a> elements pointing at the target images, so the user can click and access them when desired.
Graphic design for responsive sites - Progressive web apps (PWAs)
Web › Progressive web apps › Responsive › Graphics for responsive sites
you could use css3 properties for generating effects like drop shadows, gradients and rounded corners, and you could also consider using svg for other ui elements, instead of raster graphics formats.
... webgl/canvas you can create a canvas to draw interactive graphics on using the html <canvas> element, then use the canvas api to create shapes, lines, import image files, create text, do compositing operations, and much more.
...it is good for the visuals of games and complex data visualisions, but for standard user interface elements it is not very efficient.
Web API reference - Web technology reference
Web › Reference › API
these can be accessed using javascript code, and let you do anything from making minor adjustments to any window or element, to generating intricate graphical and audio effects using apis such as webgl and web audio.
...it allows manipulation of document node and element.
... html, xml and svg have extended it to manipulate their specific elements.
Web technology reference
Web › Reference
html provides a means to create structured documents made up of blocks called html elements that are delineated by tags, written using angle brackets.
... some introduce content into the page directly, others provide information about document text and may include other tags as sub-elements.
... introduction to html | learn html | html5 | developer guide | element reference | reference css — styling the web cascading style sheets are used to describe the appearance of web content.
SVG Styling Attributes - SVG: Scalable Vector Graphics
Web › SVG › Attribute › Styling
the svg styling attributes are all the attributes that can be specified on any svg element to apply css styling effects.
... class style attributes class assigns a class name or set of class names to an element.
... value: any valid id string; animatable: yes style it specifies style information for its element.
cursor - SVG: Scalable Vector Graphics
Web › SVG › Attribute › cursor
« svg attribute reference home the cursor attribute specifies the mouse cursor displayed when the mouse pointer is over an element.
... this attribute behaves exactly like the css cursor property except that if the browser supports the <cursor> element, you should be able to use it with the <funciri> notation.
... elements the following elements can use the cursor attribute container elements » graphics elements » browser compatibility the compatibility table on this page is generated from structured data.
direction - SVG: Scalable Vector Graphics
Web › SVG › Attribute › direction
the direction attribute specifies the inline-base direction of a <text> or <tspan> element.
...for other cases, such as when using right-to-left languages, it may be sufficient to add the direction attribute to the outermost <svg> element, and allow that direction to inherit to all text elements: note: as a presentation attribute, direction can be used as a css property.
... as a presentation attribute, it can be applied to any element but it only has effect on shapes and text context elements, including: <altglyph>, <textpath>, <text>, <tref>, and <tspan>.
fill - SVG: Scalable Vector Graphics
Web › SVG › Attribute › fill
for shapes and text it's a presentation attribute that defines the color (or any svg paint servers like gradients or patterns) used to paint the element; for animation it defines the final state of the animation.
... as a presentation attribute, it can be applied to any element but it only has an effect on the following eleven elements: <altglyph>, <circle>, <ellipse>, <path>, <polygon>, <polyline>, <rect>, <text>, <textpath>, <tref>, and <tspan>.
... for animation five elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, <animatetransform>, and <set>.
id - SVG: Scalable Vector Graphics
Web › SVG › Attribute › id
the id attribute assigns a unique name to an element.
... all elements are using this attribute.
..."120" viewbox="0 0 120 120" xmlns="http://www.w3.org/2000/svg"> <style type="text/css"> <![cdata[ #smallrect { stroke: #000066; fill: #00cc00; } ]]> </style> <rect id="smallrect" x="10" y="10" width="100" height="100" /> </svg> usage notes value <id> default value none animatable no <id> specifies the element's id.
mask - SVG: Scalable Vector Graphics
Web › SVG › Attribute › mask
the mask attribute is a presentation attribute mainly used to bind a given <mask> element with the element the attribute belongs to.
... as a presentation attribute, it can be applied to any element but it has noticeable effects mostly on the following nineteen elements: <a>, <circle>, <clippath>, <ellipse>, <g>, <glyph>, <image>, <line>, <marker>, <mask>, <path>, <pattern>, <polygon>, <polyline>, <rect>, <svg>, <symbol>, <text>, <use> usage notes value see the css property mask default value none animatable yes specifications specificat...
... candidate recommendation extends its usage to html elements.
requiredExtensions - SVG: Scalable Vector Graphics
Web › SVG › Attribute › requiredExtensions
if all of the given extensions are supported, then the attribute evaluates to true; otherwise, the current element and its children are skipped and thus will not be rendered.
... requiredextensions is often used in conjunction with the <switch> element.
... if the attribute is used in other situations, then it represents a simple switch on the given element whether to render the element or not.
systemLanguage - SVG: Scalable Vector Graphics
Web › SVG › Attribute › systemLanguage
35 elements are using this attribute: <a>, <altglyph>, <animate>, <animatecolor>, <animatemotion>, <animatetransform>, <audio>, <canvas>, <circle>, <clippath>, <cursor>, <defs>, <discard>, <ellipse>, <foreignobject>, <g>, <iframe>, <image>, <line>, <mask>, <path>, <pattern>, <polygon>, <polyline>, <rect>, <set>, <svg>, <switch>, <text>, <textpath>, <tref>, <tspan>, <unknown>, <use>, and <video> usage notes value <language-tags> default value none animatable no <language-tags> the value is a set of comma-separated tokens, each of which must be a language-tag value, as defined in bcp 47.
... systemlanguage is often used in conjunction with the <switch> element.
... if the attribute is used in other situations, then it represents a simple switch on the given element whether to render the element or not.
tabindex - SVG: Scalable Vector Graphics
Web › SVG › Attribute › tabindex
the tabindex attribute allows you to control whether an element is focusable and to define the relative order of the element for the purposes of sequential focus navigation.
... all elements are using this attribute.
...ns="http://www.w3.org/2000/svg"> <circle cx="60" cy="60" r="15" tabindex="1" /> <circle cx="60" cy="160" r="30" tabindex="3" /> <circle cx="160" cy="60" r="30" tabindex="2" /> <circle cx="160" cy="160" r="60" tabindex="4" /> </svg> usage notes value valid integer default value none animatable no valid integer relative order of the element for the purposes of sequential focus navigation.
u1 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › u1
the u1 attribute specifies list of unicode characters (refer to the description of the unicode attribute of the <glyph> element for a description of how to express individual unicode characters) and/or ranges of unicode characters, which identify a set of possible first glyphs in a kerning pair.
... if a given unicode character within the set has multiple corresponding <glyph> elements (i.e., there are multiple <glyph> elements with the same unicode attribute value but different glyph-name values), then all such glyphs are included in the set.
... two elements are using this attribute: <hkern> and <vkern> context notes value [ <character> | <urange> ]# default value none animatable no [ <character> | <urange> ]# this value indicates a comma-separated sequence of unicode characters and/or ranges of unicode characters, which identify a set of possible first glyphs in a kerning pair.
u2 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › u2
the u2 attribute specifies list of unicode characters (refer to the description of the unicode attribute of the <glyph> element for a description of how to express individual unicode characters) and/or ranges of unicode characters, which identify a set of possible second glyphs in a kerning pair.
... if a given unicode character within the set has multiple corresponding <glyph> elements (i.e., there are multiple <glyph> elements with the same unicode attribute value but different glyph-name values), then all such glyphs are included in the set.
... two elements are using this attribute: <hkern> and <vkern> context notes value [ <character> | <urange> ]# default value none animatable no [ <character> | <urange> ]# this value indicates a comma-separated sequence of unicode characters and/or ranges of unicode characters, which identify a set of possible second glyphs in a kerning pair.
values - SVG: Scalable Vector Graphics
Web › SVG › Attribute › values
five elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, <animatetransform>, and <fecolormatrix> animate, animatecolor, animatemotion, animatetransform for <animate>, <animatecolor>, <animatemotion>, and <animatetransform>, values is a list of values defining the sequence of values over the course of the animation.
... if this attribute is specified, any from, to, and by attribute values set on the element are ignored.
... fecolormatrix for the <fecolormatrix> element, values is a list of numbers interpreted differently depending on the value of the type attribute.
x1 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › x1
the x1 attribute is used to specify the first x-coordinate for drawing an svg element that requires more than one coordinate.
... elements that only need one coordinate use the x attribute instead.
... two elements are using this attribute: <line>, and <lineargradient> html,body,svg { height:100% } <svg viewbox="0 0 10 10" xmlns="http://www.w3.org/2000/svg"> <line x1="1" x2="5" y1="1" y2="9" stroke="red" /> <line x1="5" x2="5" y1="1" y2="9" stroke="green" /> <line x1="9" x2="5" y1="1" y2="9" stroke="blue" /> </svg> line for <line>, x1 defines the x coordinate of the starting point of the line.
x2 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › x2
the x2 attribute is used to specify the second x-coordinate for drawing an svg element that requires more than one coordinate.
... elements that only need one coordinate use the x attribute instead.
... two elements are using this attribute: <line>, and <lineargradient> html,body,svg { height:100% } <svg viewbox="0 0 10 10" xmlns="http://www.w3.org/2000/svg"> <line x1="5" x2="1" y1="1" y2="9" stroke="red" /> <line x1="5" x2="5" y1="1" y2="9" stroke="green" /> <line x1="5" x2="9" y1="1" y2="9" stroke="blue" /> </svg> line for <line>, x2 defines the x coordinate of the ending point of the line.
xml:space - SVG: Scalable Vector Graphics
Web › SVG › Attribute › xml:space
svg supports the built-in xml xml:space attribute to handle whitespace characters inside elements.
... child elements inside an element may also have an xml:space attribute that overrides the parentʼs one.
... all elements are using this attribute.
y1 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › y1
the y1 attribute is used to specify the first y-coordinate for drawing an svg element that requires more than one coordinate.
... elements that only need one coordinate use the y attribute instead.
... two elements are using this attribute: <line>, and <lineargradient> html,body,svg { height:100% } <svg viewbox="0 0 10 10" xmlns="http://www.w3.org/2000/svg"> <line x1="1" x2="9" y1="1" y2="5" stroke="red" /> <line x1="1" x2="9" y1="5" y2="5" stroke="green" /> <line x1="1" x2="9" y1="9" y2="5" stroke="blue" /> </svg> line for <line>, y1 defines the y coordinate of the starting point of the line.
y2 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › y2
the y2 attribute is used to specify the second y-coordinate for drawing an svg element that requires more than one coordinate.
... elements that only need one coordinate use the y attribute instead.
... two elements are using this attribute: <line>, and <lineargradient> html,body,svg { height:100% } <svg viewbox="0 0 10 10" xmlns="http://www.w3.org/2000/svg"> <line x1="1" x2="9" y1="5" y2="1" stroke="red" /> <line x1="1" x2="9" y1="5" y2="5" stroke="green" /> <line x1="1" x2="9" y1="5" y2="9" stroke="blue" /> </svg> line for <line>, y2 defines the y coordinate of the ending point of the line.
<animateTransform> - SVG: Scalable Vector Graphics
Web › SVG › Element › animateTransform
the animatetransform element animates a transformation attribute on its target element, thereby allowing animations to control translation, scaling, rotation, and/or skewing.
... usage context categoriesanimation elementpermitted contentany number of the following elements, in any order:descriptive elements example <svg width="120" height="120" viewbox="0 0 120 120" xmlns="http://www.w3.org/2000/svg"> <polygon points="60,30 90,90 30,90"> <animatetransform attributename="transform" attributetype="xml" type="rotate" from="0 60 70" to="360 60 70" dur="10s" repeatcount="indefinite"/> </polygon> </svg> live sample attributes global attributes conditional processing attributes » core attributes » animation event attributes » xlink attributes » animation attribute target attributes �...
...� animation timing attributes » animation value attributes » animation addition attributes » externalresourcesrequired specific attributes by from to type dom interface this element implements the svganimatetransformelement interface.
<circle> - SVG: Scalable Vector Graphics
Web › SVG › Element › circle
the <circle> svg element is an svg basic shape, used to draw circles based on a center point and a radius.
... value type: <number> ; default value: none; animatable: yes note: starting with svg2, cx, cy, and r are geometry properties, meaning those attributes can also be used as css properties for that element.
...a-level, aria-live, aria-modal, aria-multiline, aria-multiselectable, aria-orientation, aria-owns, aria-placeholder, aria-posinset, aria-pressed, aria-readonly, aria-relevant, aria-required, aria-roledescription, aria-rowcount, aria-rowindex, aria-rowspan, aria-selected, aria-setsize, aria-sort, aria-valuemax, aria-valuemin, aria-valuenow, aria-valuetext, role usage notes categoriesbasic shape element, graphics element, shape elementpermitted contentany number of the following elements, in any order:animation elementsdescriptive elements specifications specification status comment scalable vector graphics (svg) 2the definition of '<circle>' in that specification.
<discard> - SVG: Scalable Vector Graphics
Web › SVG › Element › discard
the <discard> svg element allows authors to specify the time at which particular elements are to be discarded, thereby reducing the resources required by an svg user agent.
... the <discard> element may occur wherever the <animate> element may.
... usage context categoriesanimation elementpermitted contentany number of the following elements, in any order:descriptive elements<script> attributes global attributes conditional processing attributes core attributes aria attributes specific attributes begin href (but note that <discard> has never supported xlink:href) specifications specification status comment svg animations level 2the definition of '<discard>' in that specification.
<ellipse> - SVG: Scalable Vector Graphics
Web › SVG › Element › ellipse
the <ellipse> element is an svg basic shape, used to create ellipses based on a center coordinate, and both their x and y radius.
... value type: <number> ; default value: none; animatable: yes note: starting with svg2 cx, cy, rx and ry are geometry properties, meaning those attributes can also be used as css properties for that element.
...a-level, aria-live, aria-modal, aria-multiline, aria-multiselectable, aria-orientation, aria-owns, aria-placeholder, aria-posinset, aria-pressed, aria-readonly, aria-relevant, aria-required, aria-roledescription, aria-rowcount, aria-rowindex, aria-rowspan, aria-selected, aria-setsize, aria-sort, aria-valuemax, aria-valuemin, aria-valuenow, aria-valuetext, role usage notes categoriesbasic shape element, graphics element, shape elementpermitted contentany number of the following elements, in any order:animation elementsdescriptive elements specifications specification status comment scalable vector graphics (svg) 2the definition of '<ellipse>' in that specification.
<feMerge> - SVG: Scalable Vector Graphics
Web › SVG › Element › feMerge
the <femerge> svg element allows filter effects to be applied concurrently instead of sequentially.
... usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<femergenode> example svg <svg width="200" height="200" xmlns="http://www.w3.org/2000/svg"> <filter id="feoffset" x="-40" y="-20" width="100" height="200"> <feoffset in="sourcegraphic" dx="60" dy="60" /> <fegaussianblur stddeviation="5" result="blur2" /> <femerge> <femergenode in="blur2" /> <femergenode in="sourcegraphic" /> </femerge> </filter> <rect x="40" y="40" width="100" height="100" style="stroke: #000000; fill: green; filter: url(#feoffset);" /> </svg> result attributes global attributes core...
... attributes presentation attributes filter primitive attributes class style specific attributes none dom interface this element implements the svgfemergeelement interface.
<filter> - SVG: Scalable Vector Graphics
Web › SVG › Element › filter
the <filter> svg element defines a custom filter effect by grouping atomic filter primitives.
... it is never rendered itself, but must be used by the filter attribute on svg elements, or the filter css property for svg/html elements.
... usage context categoriesnonepermitted contentany number of the following elements, in any order:descriptive elementsfilter primitive elements<animate>, <set> attributes global attributes core attributes presentation attributes xlink attributes class style externalresourcesrequired specific attributes x y width height filterres filterunits primitiveunits xlink:href dom interface this element implements the svgfilterelement interface.
<font-face> - SVG: Scalable Vector Graphics
Web › SVG › Element › font-face
the <font-face> svg element corresponds to the css @font-face rule.
... usage context categoriesfont elementpermitted contentany number of descriptive elements » and at most one <font-face> element, in any order.
...retch font-size unicode-range units-per-em panose-1 stemv stemh slope cap-height x-height accent-height ascent descent widths bbox ideographic alphabetic mathematical hanging v-ideographic v-alphabetic v-mathematical v-hanging underline-position underline-thickness strikethrough-position strikethrough-thickness overline-position overline-thickness dom interface this element implements the svgfontfaceelement interface.
<path> - SVG: Scalable Vector Graphics
Web › SVG › Element › path
the <path> svg element is the generic element to define a shape.
... all the basic shapes can be created with a path element.
...aria-level, aria-live, aria-modal, aria-multiline, aria-multiselectable, aria-orientation, aria-owns, aria-placeholder, aria-posinset, aria-pressed, aria-readonly, aria-relevant, aria-required, aria-roledescription, aria-rowcount, aria-rowindex, aria-rowspan, aria-selected, aria-setsize, aria-sort, aria-valuemax, aria-valuemin, aria-valuenow, aria-valuetext, role usage notes categoriesgraphics element, shape elementpermitted contentany number of the following elements, in any order:animation elementsdescriptive elements specifications specification status comment svg pathsthe definition of '<path>' in that specification.
<polygon> - SVG: Scalable Vector Graphics
Web › SVG › Element › polygon
the <polygon> element defines a closed shape consisting of a set of connected straight line segments.
... for open shapes, see the <polyline> element.
...a-level, aria-live, aria-modal, aria-multiline, aria-multiselectable, aria-orientation, aria-owns, aria-placeholder, aria-posinset, aria-pressed, aria-readonly, aria-relevant, aria-required, aria-roledescription, aria-rowcount, aria-rowindex, aria-rowspan, aria-selected, aria-setsize, aria-sort, aria-valuemax, aria-valuemin, aria-valuenow, aria-valuetext, role usage notes categoriesbasic shape element, graphics element, shape elementpermitted contentany number of the following elements, in any order:animation elementsdescriptive elements specifications specification status comment scalable vector graphics (svg) 2the definition of '<polygon>' in that specification.
<polyline> - SVG: Scalable Vector Graphics
Web › SVG › Element › polyline
the <polyline> svg element is an svg basic shape that creates straight lines connecting several points.
...for closed shapes see the <polygon> element.
...a-level, aria-live, aria-modal, aria-multiline, aria-multiselectable, aria-orientation, aria-owns, aria-placeholder, aria-posinset, aria-pressed, aria-readonly, aria-relevant, aria-required, aria-roledescription, aria-rowcount, aria-rowindex, aria-rowspan, aria-selected, aria-setsize, aria-sort, aria-valuemax, aria-valuemin, aria-valuenow, aria-valuetext, role usage notes categoriesbasic shape element, graphics element, shape elementpermitted contentany number of the following elements, in any order:animation elementsdescriptive elements specifications specification status comment scalable vector graphics (svg) 2the definition of '<polyline>' in that specification.
<rect> - SVG: Scalable Vector Graphics
Web › SVG › Element › rect
the <rect> element is a basic svg shape that draws rectangles, defined by their position, width, and height.
... value type: <number> ; default value: none; animatable: yes note: starting with svg2, x, y, width, height, rx and ry are geometry properties, meaning those attributes can also be used as css properties for that element.
...a-level, aria-live, aria-modal, aria-multiline, aria-multiselectable, aria-orientation, aria-owns, aria-placeholder, aria-posinset, aria-pressed, aria-readonly, aria-relevant, aria-required, aria-roledescription, aria-rowcount, aria-rowindex, aria-rowspan, aria-selected, aria-setsize, aria-sort, aria-valuemax, aria-valuemin, aria-valuenow, aria-valuetext, role usage notes categoriesbasic shape element, graphics element, shape elementpermitted contentany number of the following elements, in any order:animation elementsdescriptive elements specifications specification status comment scalable vector graphics (svg) 2the definition of '<rect>' in that specification.
<set> - SVG: Scalable Vector Graphics
Web › SVG › Element › set
the svg <set> element provides a simple means of just setting the value of an attribute for a specified duration.
... note: the <set> element is non-additive.
...atable: no animation attributes animation timing attributes begin, dur, end, min, max, restart, repeatcount, repeatdur, fill other animation attributes most notably: attributename animation event attributes most notably: onbegin, onend, onrepeat global attributes core attributes most notably: id styling attributes class, style event attributes global event attributes, document element event attributes usage notes categoriesanimation elementpermitted contentany number of the following elements, in any order:descriptive elements specifications specification status comment svg animations level 2the definition of '<set>' in that specification.
<stop> - SVG: Scalable Vector Graphics
Web › SVG › Element › stop
the svg <stop> element defines a color and its position to use on a gradient.
... this element is always a child of a <lineargradient> or <radialgradient> element.
... value type: <opacity>; default value: 1; animatable: yes global attributes core attributes most notably: id styling attributes class, style event attributes global event attributes, document element event attributes presentation attributes most notably: color, display, stop-color, stop-opacity, visibility usage notes categoriesgradient elementpermitted contentany number of the following elements, in any order:<animate>, <animatecolor>, <set> specifications specification status comment scalable vector graphics (svg) 2the definition of '<stop>' in that specif...
<style> - SVG: Scalable Vector Graphics
Web › SVG › Element › style
the svg <style> element allows style sheets to be embedded directly within svg content.
... svg's style element has the same attributes as the corresponding element in html (see html's <style> element).
... value type: <string>; default value: none; animatable: no global attributes core attributes most notably: id styling attributes class, style event attributes global event attributes, document element event attributes usage notes categoriesnonepermitted contentany elements or character data specifications specification status comment scalable vector graphics (svg) 2the definition of '<style>' in that specification.
<textPath> - SVG: Scalable Vector Graphics
Web › SVG › Element › textPath
to render text along the shape of a <path>, enclose the text in a <textpath> element that has an href attribute with a reference to the <path> element.
... html,body,svg { height:100% } <svg viewbox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"> <!-- to hide the path, it is usually wrapped in a <defs> element --> <!-- <defs> --> <path id="mypath" fill="none" stroke="red" d="m10,90 q90,90 90,45 q90,10 50,10 q10,10 10,40 q10,70 45,70 q70,70 75,50" /> <!-- </defs> --> <text> <textpath href="#mypath"> quick brown fox jumps over the lazy dog.
...aria-multiline, aria-multiselectable, aria-orientation, aria-owns, aria-placeholder, aria-posinset, aria-pressed, aria-readonly, aria-relevant, aria-required, aria-roledescription, aria-rowcount, aria-rowindex, aria-rowspan, aria-selected, aria-setsize, aria-sort, aria-valuemax, aria-valuemin, aria-valuenow, aria-valuetext, role xlink attributes xlink:title usage notes categoriestext content element, text content child elementpermitted contentcharacter data and any number of the following elements, in any order:descriptive elements<a>, <altglyph>, <animate>, <animatecolor>, <set>, <tref>, <tspan> specifications specification status comment scalable vector graphics (svg) 2the definition of '<textpath>' in that specification.
<tref> - SVG: Scalable Vector Graphics
Web › SVG › Element › tref
the textual content for a <text> svg element can be either character data directly embedded within the <text> element or the character data content of a referenced element, where the referencing is specified with a <tref> element.
... usage context categoriestext content element, text content child elementpermitted contentany number of the following elements, in any order:descriptive elements<animate>, <animatecolor>, <set> attributes global attributes conditional processing attributes core attributes graphical event attributes presentation attributes xlink attributes class style externalresourcesrequired specific attributes xlink:href dom interface this element implements the svgtrefelement interface.
...s="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <defs> <text id="referencedtext"> referenced character data </text> </defs> <text x="100" y="100" font-size="45" > inline character data </text> <text x="100" y="200" font-size="45" fill="red" > <tref xlink:href="#referencedtext"/> </text> <!-- show outline of canvas using 'rect' element --> <rect x="1" y="1" width="998" height="298" fill="none" stroke-width="2" /> </svg> specifications specification status comment scalable vector graphics (svg) 1.1 (second edition)the definition of '<font>' in that specification.
Fills and Strokes - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Fills and Strokes
css can be inserted inline with the element via the style attribute: <rect x="10" height="180" y="10" width="180" style="stroke: black; fill: red;"/> or it can be moved to a special style section that you include.
... <defs> stands for definitions, and it is here that you can create elements that don't appear in the svg directly, but are used by other elements.
...ndalone="no"?> <svg width="200" height="200" xmlns="http://www.w3.org/2000/svg" version="1.1"> <defs> <style type="text/css"><![cdata[ #myrect { stroke: black; fill: red; } ]]></style> </defs> <rect x="10" height="180" y="10" width="180" id="myrect"/> </svg> moving styles to an area like this can make it easier to adjust properties on large groups of elements.
Filter effects - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Filter effects
example filters are defined by <filter> element, which should be put in the <defs> section of your svg file.
...to apply your created filter on a graphic element, you set the filter attribute.
...e in="specout" in2="sourcealpha" operator="in" result="specout"/> <fecomposite in="sourcegraphic" in2="specout" operator="arithmetic" k1="0" k2="1" k3="1" k4="0" result="litpaint"/> <!-- merge offsetblur + litpaint --> <femerge> <femergenode in="offsetblur"/> <femergenode in="litpaint"/> </femerge> </filter> </defs> <!-- graphic elements --> <g filter="url(#myfilter)"> <path fill="none" stroke="#d90000" stroke-width="10" d="m50,66 c-50,0 -50,-60 0,-60 h100 c50,0 50,60 0,60z" /> <path fill="#d90000" d="m60,56 c-30,0 -30,-40 0,-40 h80 c30,0 30,40 0,40z" /> <g fill="#ffffff" stroke="black" font-size="45" font-family="verdana" > <text x="52" y="52">svg</text> </g> </g> </sv...
How to turn off form autocompletion - Web security
Web › Security › Securing your site › Turning off form autocompletion
disabling autocompletion to disable autocompletion in forms, you can set the autocomplete attribute to "off": autocomplete="off" you can do this either for an entire form, or for specific input elements in a form: <form method="post" action="/form" autocomplete="off"> […] </form> <form method="post" action="/form"> […] <div> <label for="cc">credit card:</label> <input type="text" id="cc" name="cc" autocomplete="off"> </div> </form> setting autocomplete="off" on fields has two effects: it tells the browser not to save data inputted by the user for later autocompletion on ...
... if a browser keeps on making suggestions even after setting autocomplete to off, then you have to change the name attribute of the input element.
...however modern browsers have stopped autofilling <input> elements with autocomplete="new-password" for this very reason.
Subresource Integrity - Web security
Web › Security › Subresource Integrity
using subresource integrity you use the subresource integrity feature by specifying a base64-encoded cryptographic hash of a resource (file) you’re telling the browser to fetch, in the value of the integrity attribute of any <script> or <link> element.
... subresource integrity with the <script> element you can use the following <script> element to tell a browser that before executing the https://example.com/example-framework.js script, the browser must first compare the script to the expected hash, and verify that there's a match.
... how browsers handle subresource integrity browsers handle sri by doing the following: when a browser encounters a <script> or <link> element with an integrity attribute, before executing the script or before applying any stylesheet specified by the <link> element, the browser must first compare the script or stylesheet to the expected hash given in the integrity value.
Tutorials
Web › Tutorials
mdn html element reference a comprehensive reference for html elements, and how the different browsers support them.
... html challenges use these challenges to hone your html skills (for example, "should i use an <h2> element or a <strong> element?"), focusing on meaningful markup.
... canvas tutorial learn how to draw graphics using scripting using the canvas element.
key - XPath
Web › XPath › Functions › key
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the key function returns a node-set of nodes that have the given value for the given key.
... syntax key(keyname ,value ) arguments keyname a string containing the name of the xsl:key element to be used.
... notes the xsl:key element defines what attribute on what given elements will be used to match the key.
not - XPath
Web › XPath › Functions › not
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the not function evaluates a boolean expression and returns the opposite value.
... you can test if an element doesn't have some attribute.
... <xsl:for-each match="//a[not(@name and @name = 'badname')]"> <!-- iterates over any <a> element in the document, that either has no 'name' attribute at all, or it has one, but its value is not "badname".
position - XPath
Web › XPath › Functions › position
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the position function returns a number equal to the context position from the expression evaluation context.
... <xsl:template match="//a[position() = 5]"> <!-- this template matches the fifth a element anywhere in the document.
... --> </xsl:template> <xsl:template match="//div[@class='foo']/bar[position() = 1]"> <!-- this template matches the first bar element that is a child of a div element with a class attribute equal to "foo" --> </xsl:template> defined xpath 1.0 4.1 gecko support supported.
<xsl:namespace-alias> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › namespace-alias
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:namespace-alias> element is a rarely used device that maps a namespace in the stylesheet to a different namespace in the output tree.
... the most common use for this element is in generating a stylesheet from another stylesheet.
... to prevent a normally xsl:-prefixed literal result element (which should simply be copied as-is to the result tree) from being misunderstood by the processor, it is assigned a temporary namespace which is appropriately re-converted back to the xslt namespace in the output tree.
<xsl:variable> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › variable
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:variable> element declares a global or local variable in a stylesheet and gives it a value.
...if the element contains a template, this attribute is ignored.
...if it occurs as a top-level element, the variable is global in scope, and can be accessed throughout the document.
<xsl:when> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › when
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:when> element always appears within an <xsl:choose> element, acting like a case statement.
...if true, the contents of the element are processed; if false, they are ignored.
... type subinstruction, always appears within an <xsl:choose> element.
<xsl:with-param> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › with-param
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:with-param> element sets the value of a parameter to be passed into a template.
...if the element contains a template, this attribute is ignored.
... type subinstruction, always appears within an <xsl:apply-templates> or an <xsl:call-template> element.
PI Parameters - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › PI Parameters
before the first element tag.
... examples set the parameter 'color' to the string 'red': <?xslt-param name="color" value="red"?> set the parameter 'columns' to the number 2: <?xslt-param name="columns" select="2"?> set the parameter 'books' to a nodeset containing all <book> elements in the null namespace: <?xslt-param name="books" select="//book"?> set the parameter 'show-toc' to boolean true: <?xslt-param name="show-toc" select="true()"?> the select attribute context the following context is used to parse and evaluate the expression in the select attribute.
... examples set the parameter 'books' to a nodeset containing all <book> elements in the 'http://www.example.org/mynamespace' namespace: <?xslt-param-namespace prefix="my" namespace="http://www.example.org/mynamespace"?> <?xslt-param name="books" select="//my:book"?> supported versions supported as of firefox 2.0.0.1.
The Netscape XSLT/XPath Reference - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Transforming XML with XSLT › The Netscape XSLT XPath Reference
the following is an alphabetized and annotated list of the elements, axes, and functions from the w3c's 1.0 recommendation for xslt, as well as from the appropriate sections of the xpath recommendation.
... elements xsl:apply-imports (supported) xsl:apply-templates (supported) xsl:attribute (supported) xsl:attribute-set (supported) xsl:call-template (supported) xsl:choose (supported) xsl:comment (supported) xsl:copy (supported) xsl:copy-of (supported) xsl:decimal-format (supported) xsl:element (supported) xsl:fallback (not supported) xsl:for-each (supported) xsl:if (supported) xsl:import (mostly supported) xsl:include (supported) xsl:key (supported) xsl:message (supported) xsl:namespace-alias (not supported) xsl:number (partially supported) xsl:otherwise (supported) xsl:output (partially supported) xsl:param (supported) xsl:preserve-space (su...
...d) xsl:with-param (supported) axes ancestor ancestor-or-self attribute child descendant descendant-or-self following following-sibling namespace (not supported) parent preceding preceding-sibling self functions boolean() (supported) ceiling() (supported) concat() (supported) contains() (supported) count() (supported) current() (supported) document() (supported) element-available() (supported) false() (supported) floor() (supported) format-number() (supported) function-available() (supported) generate-id() (supported) id() (partially supported) key() (supported) lang() (supported) last() (supported) local-name() (supported) name() (supported) namespace-uri() (supported) normalize-space() (supported) not() (supported) number() (supp...
Transforming XML with XSLT - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Transforming XML with XSLT
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes an overview the separation of content and presentation is a key design feature of xml.
... xslt/xpath reference elements xsl:apply-imports (supported) xsl:apply-templates (supported) xsl:attribute (supported) xsl:attribute-set (supported) xsl:call-template (supported) xsl:choose (supported) xsl:comment (supported) xsl:copy (supported) xsl:copy-of (supported) xsl:decimal-format (supported) xsl:element (supported) xsl:fallback (not supported) xsl:for-each (supported) xsl:if (supported) xsl:import (m...
...pported) xsl:with-param (supported) axes ancestor ancestor-or-self attribute child descendant descendant-or-self following following-sibling namespace (not supported) parent preceding preceding-sibling self functions boolean() (supported) ceiling() (supported) concat() (supported) contains() (supported) count() (supported) current() (supported) document() (supported) element-available() (supported) false() (supported) floor() (supported) format-number() (supported) function-available() (supported) generate-id() (supported) id() (partially supported) key() (supported) lang() (supported) last() (supported) local-name() (supported) name() (supported) namespace-uri() (supported) normalize-space() (supported) not() (supported) number() (supported) position...
Using the Mozilla JavaScript interface to XSL Transformations - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Using the Mozilla JavaScript interface to XSL Transformations
if that node is a document node, you can pass in a full xsl transform or a literal result element transform, otherwise it must be an xsl:stylesheet or xsl:transform element.
... transformtodocument xsltprocessor.transformtodocument() takes one argument, the source node to transform, and returns a new document with the results of the transformation: var newdocument = processor.transformtodocument(domtobetransformed); the resultant object depends on the output method of the stylesheet: html - htmldocument xml - xmldocument text - xmldocument with a single root element <transformiix:result> with the text as a child transformtofragment you can also use xsltprocessor.transformtofragment() which will return a documentfragment node.
...it will not produce an html dom objects if only the toplevel element of the result is <html> as xsltprocessor.transformtofragment() is rarely used to create this element.
Advanced Example - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › XSLT JS interface in Gecko › Advanced Example
the xsl:sort element's order attribute can access the value of the parameter using $myorder.
... // importnode is used to clone the nodes we want to process via xslt - true makes it do a deep clone var mynode = document.getelementbyid("example"); var clonednode = xmlref.importnode(mynode, true); // after cloning, we append xmlref.appendchild(clonednode); // set the sorting parameter in the xsl file var sortval = xsltprocessor.getparameter(null, "myorder"); if (sortval == "" || sortval == "descending") xsltprocessor.setparameter(null, "myorder", "ascending"); else xsltprocessor.setparameter(null, "m...
...yorder", "descending"); // initiate the transformation var fragment = xsltprocessor.transformtofragment(xmlref, document); // clear the contents document.getelementbyid("example").innerhtml = ""; mydom = fragment; // add the new content from the transformation document.getelementbyid("example").appendchild(fragment) } // xsl stylesheet: <?xml version="1.0" encoding="utf-8"?> <xsl:stylesheet version="1.0" xmlns="http://www.w3.org/1999/xhtml" xmlns:html="http://www.w3.org/1999/xhtml" xmlns:xsl="http://www.w3.org/1999/xsl/transform"> <xsl:output method="html" indent="yes" /> <xsl:param name="myorder" /> <xsl:template match="/"> <xsl:apply-templates select="/div//div"> <xsl:sort select="." data-type="number" order="{$myorder}" /> </xsl:apply-templates> </xs...
Cross-domain Content Scripts - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Guides › Content Scripts › Cross Domain Content Scripts
me whose content is served from "http://en.m.wikipedia.org/": <!doctype html> <!-- page.html --> <html> <head></head> <body> <iframe id="wikipedia" src="http://en.m.wikipedia.org/"></iframe> </body> </html> the "page-script.js" file locates "today's featured article" and sends its content to "main.js": // page-script.js var iframe = window.document.getelementbyid("wikipedia"); var todaysfeaturedarticle = iframe.contentwindow.document.getelementbyid("mp-tfa"); self.postmessage(todaysfeaturedarticle.textcontent); for this to work, we need to add the "cross-domain-content" key to "package.json": "permissions": { "cross-domain-content": ["http://en.m.wikipedia.org/"] } the add-on should successfully retrieve the iframe's content.
...latest forecast: // panel-script.js var url = "http://datapoint.metoffice.gov.uk/public/data/txt/wxfcs/regionalforecast/json/500?key=your-api-key"; self.port.on("show", function () { var request = new xmlhttprequest(); request.open("get", url, true); request.onload = function () { var jsonresponse = json.parse(request.responsetext); var summary = getsummary(jsonresponse); var element = document.getelementbyid("forecast_summary"); element.textcontent = summary; }; request.send(); }); function getsummary(forecast) { return forecast.regionalfcst.fcstperiods.period[0].paragraph[0].$; } finally, we need to add the "cross-domain-content" key to "package.json": "permissions": { "cross-domain-content": ["http://datapoint.metoffice.gov.uk"] } content permissions and ...
port - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Guides › Content Scripts › port
this example rewrites the content script in the port.removelistener() example so that it uses once(): // content-script.js function getfirstparagraph() { var paras = document.getelementsbytagname('p'); console.log(paras[0].textcontent); } self.port.once("get-first-para", getfirstparagraph); removelistener() you can use port.on() to listen for messages.
... // content-script.js function getfirstparagraph() { var paras = document.getelementsbytagname('p'); console.log(paras[0].textcontent); self.port.removelistener("get-first-para", getfirstparagraph); } self.port.on("get-first-para", getfirstparagraph); the result is that the paragraph is only logged the first time the button is clicked.
Communicating using "postMessage" - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Guides › Content Scripts › using postMessage
now we have to embed the event type in the message payload, and implement a switch function in the receiver to dispatch the message: var pagemodscript = "window.addeventlistener('mouseover', function(event) {" + " self.postmessage({" + " kind: 'mouseover'," + " element: event.target.tostring()" + " });" + "}, false);" + "window.addeventlistener('mouseout', function(event) {" + " self.postmessage({" + " kind: 'mouseout'," + " element: event.target.tostring()" + " });" + " }, false);" var pagemod...
... = require('sdk/page-mod').pagemod({ include: ['*'], contentscript: pagemodscript, onattach: function(worker) { worker.on('message', function(message) { switch(message.kind) { case 'mouseover': console.log('mouseover: ' + message.element); break; case 'mouseout': console.log('mouseout: ' + message.element); break; } }); } }); implementing the same add-on with user-defined events is shorter and more readable: var pagemodscript = "window.addeventlistener('mouseover', function(event) {" + " self.port.emit('mouseover', event.target.tostring());" + "}, false);" + "window.addeventlistener('mouseout', function(event) {" + " self.port.emit('mouseout', ...
content/loader - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › content loader
var pageloader = loader.compose({ constructor: function pageloader(options) { options = options || {}; if (options.contenturl) this.contenturl = options.contenturl; this.on('propertychange', this._onchange = this._onchange.bind(this)); let self = this; hiddenframes.add(hiddenframes.hiddenframe({ onready: function onready() { let frame = self._frame = this.element; self._emit('propertychange', { contenturl: self.contenturl }); } })); }, _onchange: function _onchange(e) { if ('contenturl' in e) this._frame.setattribute('src', this._contenturl); } }); loader properties contentscriptfile the local file urls of content scripts to load.
...this may take one of the following values: "start": load content scripts immediately after the document element for the page is inserted into the dom, but before the dom content itself has been loaded "ready": load content scripts once dom content has been loaded, corresponding to the domcontentloaded event "end": load content scripts once all the content (dom, js, css, images) for the page has been loaded, at the time the window.onload event fires contentscriptoptions read-only value exposed to conte...
content/symbiont - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › content symbiont
this may take one of the following values: "start": load content scripts immediately after the document element for the page is inserted into the dom, but before the dom content itself has been loaded "ready": load content scripts once dom content has been loaded, corresponding to the domcontentloaded event "end": load content scripts once all the content (dom, js, css, images) for the page has been loaded, at the time the window.onload event fires this property is optional and defaults...
...this may have one of the following values: "start": load content scripts immediately after the document element for the page is inserted into the dom, but before the dom content itself has been loaded "ready": load content scripts once dom content has been loaded, corresponding to the domcontentloaded event "end": load content scripts once all the content (dom, js, css, images) for the page has been loaded, at the time the window.onload event fires contentscriptoptions read-only value exposed to conte...
Annotator - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Tutorials › Annotator
the add-on is an annotator: it enables the user to select elements of web pages and enter notes (annotations) associated with them.
...whenever the user loads a page containing annotated elements these elements are highlighted, and if the user moves the mouse over an annotated element its annotation is displayed.
File I/O - Archive of obsolete content
Archive › Add-ons › Code snippets › File I O
however, you can enumerate available drives using the following code: components.utils.import("resource://gre/modules/fileutils.jsm"); var root = new fileutils.file("\\\\."); var drivesenum = root.directoryentries, drives = []; while (drivesenum.hasmoreelements()) { drives.push(drivesenum.getnext().
... // file is the given directory (nsifile) var entries = file.directoryentries; var array = []; while(entries.hasmoreelements()) { var entry = entries.getnext(); entry.queryinterface(components.interfaces.nsifile); array.push(entry); } reading from a file read into a stream or a string this will allow you to read a file without locking up the ui thread while reading.
IsDefaultNamespace - Archive of obsolete content
Archive › Add-ons › Code snippets › IsDefaultNamespace
// http://www.w3.org/tr/dom-level-3-core/core.html#node3-isdefaultnamespace // http://www.w3.org/tr/dom-level-3-core/namespaces-algorithms.html#isdefaultnamespacealgo function isdefaultnamespace(node, namespaceuri) { if (node.isdefaultnamespace) { return node.isdefaultnamespace(namespaceuri); } switch (node.nodetype) { case 1: // element_node if (!node.prefix) { return (node.namespaceuri === namespaceuri); } if (node.attributes.length) { for (var i=0; i < node.attributes.length; i++) { var att = node.attributes[i]; if (att.localname === 'xmlns') { return att.value === namespaceuri; ...
... } } } if (node.parentnode) { // entityreferences may have to be skipped to get to it return isdefaultnamespace(node.parentnode, namespaceuri); } else { return false; // unknown; } case 9: // document_node return isdefaultnamespace(node.documentelement, namespaceuri); case 6: // entity_node case 12: // notation_node case 10: // document_type_node case 11: // document_fragment_node return false; // unknown case 2: // attribute_node: if (node.ownerelement ) { return isdefaultnamespace(node.ownerelement , namespaceuri); } else { return false; ...
JavaScript timers - Archive of obsolete content
Archive › Add-ons › Code snippets › Timers
basic animations since we're using script to control canvas elements it's also very easy to make (interactive) animations.
... unfortunately the canvas element was never designed to be used in this way (unlike flash) so there are limitations.
Code snippets - Archive of obsolete content
Archive › Add-ons › Code snippets
miscellaneous miscellaneous useful code fragments html to dom using a hidden browser element to parse html to a window's dom javascript libraries here are some javascript libraries that may come in handy.
...interact with the javascript debugger service svg general general information and utilities svg animation animate svg using javascript and smil svg interacting with script using javascript and dom events to create interactive svg embedding svg in html and xul using svg to enhance html or xul based markup xul widgets html in xul for rich tooltips dynamically embed html into a xul element to attain markup in a tooltip label and description special uses and line breaking examples tree setup and manipulation of trees using xul and js scrollbar changing style of scrollbars.
Jetpack Processes - Archive of obsolete content
Archive › Add-ons › Jetpack Processes
it returns an array whose elements are the return values of each receiver in the chrome process that was triggered by the message.
...this is useful for associating handles to the lifetime of a particular window, context menu, or other element, and helping ensure that they do not leak.
Setting Up a Development Environment - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School › Setting Up a Development Environment
hint: you can search for an element by id.
... now that you know how to quickly monitor your project and test changes, we'll learn how to add new ui elements to firefox, through overlays and new windows.
Performance best practices in extensions - Archive of obsolete content
Archive › Add-ons › Performance best practices in extensions
the listeners should be added to the most specific element possible, and removed when not immediately necessary.
... avoid animated images animated images are much more expensive than generally expected, especially when used in xul tree elements..
Security best practices in extensions - Archive of obsolete content
Archive › Add-ons › Security best practices in extensions
the main way to do this is by creating an iframe or browser element in the sidebar, and loading your content there.
... give the element a type="content" attribute, which essentially sandboxes the code there and blocks callback rights into chrome.
Getting the page URL in NPAPI plugin - Archive of obsolete content
Archive › Getting the page URL in NPAPI plugin
via dom from benjamin smedberg: the npapi gives you the ability to get access to the nsidomwindow object which contains the current plugin via the npnvdomelement enum passed to npn_getvalue.
... this returns an addrefed nsidomelement interface pointer from which you can call .ownerdocument (on nsidomnode), queryinterface that object to nsidom3document, and call .documenturi.
Images, Tables, and Mysterious Gaps - Archive of obsolete content
Archive › Misc top level › Images, Tables, and Mysterious Gaps
the baseline's exact placement is dependent on the "default" font for the line box (represented by the red box), which is determined by the value of font-family for the element that contains the line box.
... of course, documents authored in xhtml strict or html strict will trigger the "standards" rendering mode, so we're going to go through two basic ways to address the problem in strict documents, and a number of ways to call on these "fixes." setting images to be blocks the first choice, and one that will work for most graphically-intense designs, is to convert the image from being an inline element to a block-level element.
No Proxy For configuration - Archive of obsolete content
Archive › Misc top level › No Proxy For configuration
entry points: preferences | advanced | proxies control-click menu for off line-online icon (network plug) configuration the no proxy list is composed of either domain elements or ipv4 address elements.
... the elements are separated by either a space (" ") or a comma (",").
Creating a Firefox sidebar extension - Archive of obsolete content
Archive › Mozilla › Creating a Firefox sidebar extension
pre-requisites this article is a quick start, it won't explain all elements of xul, packaging and xpi's.
...other elements can be included, please read the xul tutorials for more information.
Finding the code to modify - Archive of obsolete content
Archive › Mozilla › Creating a Mozilla extension › Finding the code to modify
find the statusbar element within it.
... inspectorwidget the inspectorwidget extension adds a toolbar button and context menus for invoking the dom inspector (domi) for either chrome or content elements.thus this makes it possible to save all the above dom inspector user interface diggings.
Jetpack Snippets - Archive of obsolete content
Archive › Mozilla › Jetpack › Snippets
using firebug lite in a slidebar jetpack.future.import("slidebar");jetpack.slidebar.append({ html: <html><head></head><body> <p>some slidbar you want to debug</p> <a href="javascript:console.log('hello!')">test</a> <script><![cdata[ //firebug lite bookmarklet code: var firebug=document.createelement('script'); firebug.setattribute('src','http://getfirebug.com/releases/lite/1.2/firebug-lite-compressed.js'); document.body.appendchild(firebug); (function(){if(window.firebug.version){firebug.init();}else{settimeout(arguments.callee);}})();void(firebug); ]]></script> </body></html>, width: 800, //wide enough to use firebug on...
...true); }}); calling into a slidebar from the global jetpack scope jetpack.slidebar.append({ onready: function (slide) { // call out to a global function, passing the slidebar object exinitslidebar(slide); }, ...});function exinitslidebar(aslidebar) { // this variable will now be global slider = aslidebar;} // then, accessing the slidebar htmlvar tl = slider.contentdocument.getelementbyid("thumblist"); // or calling slidebar api methods or accessing propertiesslider.notify(); ...
New Security Model for Web Services - Archive of obsolete content
Archive › Mozilla › New Security Model for Web Services
<!element webscriptaccess (delegate?|allow*)> <!element delegate empty> <!element allow empty> <!attlist allow type|from cdata #implied>.
... the root element the first element of the file should be the following: <wsa:webscriptaccess xmlns:wsa="http://www.mozilla.org/2002/soap/security"> delegation if the <delegate/> element is present then "web-scripts-access.xml" is required in the subdirectory for uris which are in a subdirectory.
Supporting per-window private browsing - Archive of obsolete content
Archive › Mozilla › Supporting per-window private browsing
as an example, if an add-on adds a context menu item that accesses an api that requires an nsiloadcontext, the most relevant window is the one that owns the element being targeted by the context menu (element.ownerdocument.defaultview).
... if some action triggered by a chrome element (such as a button) requires an api that takes a privacy context, the most relevant window is the one that contains the chrome element.
Supporting private browsing mode - Archive of obsolete content
Archive › Mozilla › Supporting private browsing mode
let docroot = document.documentelement; if (docroot.hasattribute("privatebrowsingmode")) { // private browsing mode is enabled } if (docroot.getattribute("privatebrowsingmode") == "temporary") { // private browsing mode is temporary } if (docroot.getattribute("privatebrowsingmode") == "permanent") { // private browsing mode is permanent for this session } turning private browsing on and off extensions can turn private browsi...
...private browsing for theme designers if you want to make your theme look different when used in private browsing mode, you can do so quite easily by using the browsingmode attribute in the window element in browser.xul.
The life of an HTML HTTP request - Archive of obsolete content
Archive › Mozilla › The life of an HTML HTTP request
these content nodes are created by calling functions like ns_newhtmlxxxxelement().
... these element nodes implement the nsihtmlcontent interface as well as their respective dom interfaces.
XTech 2005 Presentations - Archive of obsolete content
Archive › Mozilla › XTech 2005 Presentations
e4x marries xml and javascript syntax, and extends javascript to include namespaces, qualified names, and xml elements and lists.
...the mozilla project will meet this challenge with two major new features to be delivered in firefox 1.1: integrated svg and a new canvas html element.
autocompletepopup - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › autocompletepopup
« xul reference home autocompletepopup type: id the id of a popup element used to hold autocomplete results for the element.
... examples how to enable autocomplete (form fill) in a browser element.
command - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › command
« xul reference home command type: id set to the id of a command element that is being observed by the element.
... example <command id="cmd_openhelp" oncommand="alert('help');"/> <button label="help" command="cmd_openhelp"/> <button label="more help" command="cmd_openhelp"/> see also command element, oncommand and commandset ...
context - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › context
« xul reference home context type: id should be set to the value of the id of the popup element that should appear when the user context-clicks on the element.
...you can use the special value '_child' to indicate the first menupopup child of the element.
control - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › control
« xul reference home control type: id this attribute specifies the id of the element with which the label is associated.
... when the user clicks on the label, the associated element is given focus.
crop - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › crop
« xul reference home crop type: one of the values below if the label of the element is too big to fit in its given space, the text will be cropped on the side specified by the crop attribute.
... depending on the platform and theme being used, some elements will have set a maximum width so they will always appear cropped.
height - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › height
« xul reference home height type: string (representing an integer) the preferred height of the element in pixels.
... the actual displayed height may be different if the element or its contents have a minimum or maximum height.
image.onload - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › image.onload
« xul reference home image.onload type: script code this event handler will be called on the image element when the image has finished loading.
...this event will not bubble up the element tree.
image - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › image
« xul reference home image type: uri the uri of the image to appear on the element.
... example <menuitem label="foo" class="menuitem-iconic" image="something.png"/> see also image element ...
isempty - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › isempty
true: the rule will only match nodes that contain no child elements.
... false: the rule will only match nodes that contain one or more child elements.
linkedpanel - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › linkedpanel
« xul reference home linkedpanel type: id the id of the linked tabpanel element that will be displayed when the tab is selected.
... if this attribute is not used, the tab will be connected to the panel at the corresponding index in the tabpanels element that the tab is in its tabs container.
modifiers - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › modifiers
access: the access key for activating menus and other elements.
... on windows, this is the alt key, used in conjuction with an element's accesskey.
noinitialfocus - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › noinitialfocus
« xul reference homenoinitialfocustype: booleanif false, the default value, the element is considered when determining which element should be initially focused in a dialog.
... if true, the element will not receive initial focus.
panel.type - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › panel.type
should be one of the following: autocomplete specify this for a panel that provides a tree for an autocomplete element.
... autocomplete-richlistbox specify this for a panel that provides a richlistbox for an autocomplete element.
popup - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › popup
« xul reference home popup type: id should be set to the value of the id of the popup element that should appear when the user clicks on the element.
... see also more information on the popup element in the xul tutorial ...
popupanchor - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › popupanchor
« xul reference homepopupanchortype: one of the values belowpopupanchor is an optional attribute for specifying where popup content should be anchored on the element.noneno anchortopleftanchor to the top left cornertoprightanchor to the top right cornerbottomleftanchor to the bottom left cornerbottomrightanchor to the bottom right cornersyntax<element popupanchor="none | topleft | topright | bottomleft | bottomright" /> example<element id="edit-context" popup="editor-popup" popupanchor="topleft" popupalign="bottomright" /> notesthe popupanchor attribute can be used to specify that the popup content should come up anchored to one of the four corners of the content object (e.g., the button popping up the content).
...popupanchor works in conjunction with popupalign to position the popup content on the element.
selected - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › selected
« xul reference home selected type: boolean indicates whether the element is selected or not.
...to change the selection, set either the selectedindex or selecteditem property of the containing element.
separator.orient - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › separator.orient
horizontal the separator separates vertically placed elements.
... vertical the separator separates horizontally placed elements.
setfocus - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › setfocus
« xul reference home setfocus type: boolean if true or omitted, the focus will be given to the first element in the corresponding tabpanel when the tabs are navigated via the keyboard.
... see also dom element focus ...
spellcheck - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › spellcheck
if not specified, this defaults to false the html the spellcheck attribute uses values of true or false (you cannot simply add the spellcheck attribute to a given element): <!-- spellcheck everything!
...--> <input type="text" spellcheck="false" /><br /> <textarea spellcheck="false"></textarea> <div contenteditable="true" spellcheck="false">i am some content</div> you can use spellcheck on input, textarea, and contenteditable elements.
statustext - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › statustext
« xul reference home statustext type: string used to set the text that appears on the status bar when the user moves the mouse over the element.
...text="connect to remote server" onmouseover="setstatusmessage(this)" onmouseout="clearstatusmessage()"/> <button label="ping" statustext="ping the server" onmouseover="setstatusmessage(this)" onmouseout="clearstatusmessage()"/> <statusbar> <statusbarpanel id="mystatuspanel" label="" flex="1"/> <spacer flex="1"/> </statusbar> <script> function setstatusmessage(obj){ document.getelementbyid('mystatuspanel').label = obj.getattribute('statustext'); } function clearstatusmessage(obj){ document.getelementbyid('mystatuspanel').label = ''; } </script> see also statusbar and statusbarpanel ...
substate - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › substate
before the element immediately before the splitter is collapsed.
... after the element immediately after the splitter is collapsed.
tabindex - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › tabindex
« xul reference home tabindex type: integer the tab order of the element.
...elements with a higher tabindex are later in the tab sequence.
tooltip - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › tooltip
« xul reference home tooltip type: id should be set to the value of the id of the tooltip or panel element that should be used as a tooltip window when the mouse hovers over the element for a moment.
...if this attribute is set to '_child', the first tooltip child element inside the element is used.
tooltiptext - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › tooltiptext
« xul reference home tooltiptext type: string used to set the text which appears in the tooltip when the user moves the mouse over the element.
...the tooltip is displayed in a default tooltip which displays only a label, however the default tooltip may be changed by setting the default attribute on a tooltip element.
treecol.src - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › treecol.src
« xul reference home src type: uri set this attribute to have the treecol element use an image for the header instead of a label.
...the class treecol-image must be used on the treecol element for the image to appear.
wait-cursor - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › wait-cursor
« xul reference home wait-cursor type: boolean set this attribute to true to have the cursor switch to a waiting cursor while the mouse is hovering over the element.
... usually, you would only use this on the window element or other top-level elements.
width - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › width
« xul reference home width type: string (representing an integer) the preferred width of the element.
...the actual displayed width may be different if the element or its contents have a minimum or maximum width, or the size is adjusted by the flexibility or alignment of its parent.
Attribute (XUL) - Archive of obsolete content
Archive › Mozilla › XUL › Attribute
tainer containment contentcontextmenu contenttooltip context contextmenu control crop curpos current currentset customindex customizable cycler datasources decimalplaces default defaultbutton defaultset description dir disableautocomplete disableautoselect disableclose disabled disablehistory disablekeynavigation disablesecurity dlgtype dragging editable editortype element empty emptytext deprecated since gecko 2 enablecolumndrag enablehistory equalsize eventnode events expr firstdayofweek firstpage first-tab fixed flags flex focused forcecomplete grippyhidden grippytooltiptext group handlectrltab height helpuri hidden hidechrome hidecolumnpicker hideheader hideseconds hidespinbuttons highlightnonmatches homepage href icon id ign...
...textcommand ontextentered ontextrevert ontextreverted onunload onwizardback onwizardcancel onwizardfinish onwizardnext open ordinal orient pack pageid pageincrement pagestep parent parsetype persist persistence phase pickertooltiptext placeholder popup position predicate preference preference-editable primary priority properties querytype readonly ref rel removeelement resizeafter resizebefore rows screenx screeny searchbutton searchsessions searchlabel selected selectedindex seltype setfocus showcaret showcommentcolumn showpopup size sizemode sizetopopup smoothscroll sort sortactive sortdirection sortresource sortresource2 spellcheck src state statedatasource statusbar statustext style subject substate suppressonselect tabind...
CheckboxStateChange - Archive of obsolete content
Archive › Mozilla › XUL › Events › CheckboxStateChange
the checkboxstatechange event is executed when the state of a <checkbox> element has changed.
... general info specification xul interface event bubbles yes cancelable yes target element default action none properties property type description target read only eventtarget the event target (the topmost target in the dom tree).
RadioStateChange - Archive of obsolete content
Archive › Mozilla › XUL › Events › RadioStateChange
the radiostatechange event is executed when the state of a <radio> element has changed.
... general info specification xul interface event bubbles yes cancelable yes target element default action none properties property type description target read only eventtarget the event target (the topmost target in the dom tree).
ValueChange - Archive of obsolete content
Archive › Mozilla › XUL › Events › ValueChange
the valuechange event is executed when the value of an element, <progress> for example, has changed.
... general info specification xul interface event bubbles yes cancelable yes target element default action none properties property type description target read only eventtarget the event target (the topmost target in the dom tree).
broadcast - Archive of obsolete content
Archive › Mozilla › XUL › Events › broadcast
the broadcast event is executed when the attributes of the element (such as a broadcaster) being listened to are changed.
... general info specification xul interface event bubbles no cancelable no target element default action none properties property type description target read only eventtarget the event target (the topmost target in the dom tree).
How to implement a custom XUL query processor component - Archive of obsolete content
Archive › Mozilla › XUL › How to implement a custom XUL query processor component
// the output for a result has been removed and the result is no longer being used by the builder hasbeenremoved: function() { } }; // basic wrapper for nsisimpleenumerator function templateresultset(aarrayofdata) { this._index = 0; this._array = aarrayofdata; } templateresultset.prototype = { queryinterface: xpcomutils.generateqi([components.interfaces.nsisimpleenumerator]), hasmoreelements: function() { return this._index < this._array.length; }, getnext: function() { return new templateresult(this._array[this._index++]); } }; // the query processor class - implements nsixultemplatequeryprocessor function templatequeryprocessor() { // our basic list of data this._data = [ {name: "mark", age: 36, hair: "brown", eye: "brown"}, {na...
... we do not make use of any <query/> or <rule/> elements in the xul template block.
appendCustomToolbar - Archive of obsolete content
Archive › Mozilla › XUL › Method › appendCustomToolbar
« xul reference home appendcustomtoolbar( name, currentset ) firefox only return type: element adds a custom toolbar to the toolbox with the given name.
...the method returns the dom element for the created toolbar.
blur - Archive of obsolete content
Archive › Mozilla › XUL › Method › blur
« xul reference home blur() return type: no return value if the focus is on the element, it is removed.
... the focus is not automatically placed on any other element.
removeItemAt - Archive of obsolete content
Archive › Mozilla › XUL › Method › removeItemAt
« xul reference home removeitemat( index ) return type: element removes the child item in the element at the specified index.
... <script language="javascript"> function removeselecteditem(){ var mylistbox = document.getelementbyid('mylistbox'); if(mylistbox.selectedindex == -1){ return; // no item selected so return }else{ mylistbox.removeitemat(mylistbox.selectedindex); } } function removeallitems(){ var mylistbox = document.getelementbyid('mylistbox'); var count = mylistbox.itemcount; while(count-- > 0){ mylistbox.removeitemat(0); } } </script> <button label="remove selected item" oncommand="removeselecteditem()"/> <button label="remove all items" oncommand="removeallitems()"/> <listbox id="mylistbox"> <listitem label="alpha"/> <listitem label="beta"/> <listitem label="oscar"/> <listitem label="foxtrot"/> </listb...
Floating Panels - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › Floating Panels
a floating panel can be created using the panel element with at least two additional attributes as in the following example: <panel id="tools-panel" noautohide="true" titlebar="normal"> <label control="name" value="name:"/> <textbox id="name"/> </panel> the noautohide attribute is used to indicate that the panel is not temporary.
...a floating panel may contain any type of element.
Special per-platform menu considerations - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › Platform considerations
notes for firefox extension developers on the mac, some elements, once moved to the application menu, are no longer accessible from xul overlays or from javascript injected into browser.xul.
... for example, using document.getelementbyid() for the quit menu item returns the hidden item that still sits in the file menu.
boxObject - Archive of obsolete content
Archive › Mozilla › XUL › Property › boxObject
« xul reference boxobject type: nsiboxobject this property is available for elements that are derived from boxes, which is most displayable xul elements.
... prior to gecko 1.9.1, you can retrieve the boxobject for non-xul elements using the document.getboxobjectfor method; the method was removed in gecko 1.9.1 because it was non-standard.
database - Archive of obsolete content
Archive › Mozilla › XUL › Property › database
« xul reference database type: nsirdfcompositedatasource returns the composite datasource created when all the datasources of an element are combined.
... set to null for elements that do not have a datasources attribute.
deck.selectedPanel - Archive of obsolete content
Archive › Mozilla › XUL › Property › deck.selectedPanel
« xul reference do not hide panels; the deck element only understands visible panels.
... selectedpanel type: element holds a reference to the currently selected panel within a deck element.
inputField - Archive of obsolete content
Archive › Mozilla › XUL › Property › inputField
« xul reference inputfield type: textbox element in mozilla, the xul textbox is implemented as a wrapper around an html input element.
... this read only property holds a reference to this inner input element.
richlistitem.label - Archive of obsolete content
Archive › Mozilla › XUL › Property › richlistitem.label
« xul reference label type: string gets the concatentation of text from any child label elements.
...use the child elements directly to set label text.
selected - Archive of obsolete content
Archive › Mozilla › XUL › Property › selected
« xul reference selected type: boolean this property's value is true if this element is selected, or false if it is not.
...this property is available for menuitem and menuseparator elements in firefox 3.
textbox.label - Archive of obsolete content
Archive › Mozilla › XUL › Property › textbox.label
otherwise it returns the value of the associated label element, if applicable.
... note: prior to firefox 3, and always in thunderbird and seamonkey, the label property of an autocomplete textbox returns its value, for compatibility with the menulist element.
Building Hierarchical Trees - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Building Hierarchical Trees
<treeitem uri="rdf:*"> <treerow> <treecell label="rdf:http://www.xulplanet.com/rdf/address"/> <treecell label="rdf:http://www.xulplanet.com/rdf/floors"/> </treerow> </treeitem> </treechildren> </rule> <rule> <treechildren> <treeitem uri="rdf:*"> <treerow> <treecell label="rdf:http://purl.org/dc/elements/1.1/title"/> </treerow> </treeitem> </treechildren> </rule> </template> </tree> the first rule is for the houses as indicated by the rule's condition and the second rule is for the streets.
...in this example, the two group elements are displayed at the first level.
Namespaces - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Namespaces
xml namespaces can be used in xul templates by binding the namespace uri and prefix to the template element.
..."julius caesar" gender="male"/> <person name="ferdinand magellan" gender="male"/> <person name="laura secord" gender="female"/> </people> <listbox datasources="people.xml" ref="*" querytype="xml"> <template xmlns:ns="www.example.com/people"> <query expr="ns:person"/> <action> <listitem uri="?" label="?ns:name"/> </action> </template> </listbox> once added to the template element the namespaces can then be referenced inside temple rule elements too, this works both in rdf and xml templates.
Using Multiple Queries to Generate More Results - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Using Multiple Queries to Generate More Results
<template> <queryset> <query> <content uri="?start"/> <member container="?start" child="?item"/> </query> <rule> <binding subject="?item" predicate="http://purl.org/dc/elements/1.1/title" object="?title"/> <action> <label uri="?item" value="?title" class="header"/> </action> </rule> </queryset> <queryset> <query> <content uri="?start"/> <triple subject="?start" predicate="http://www.xulplanet.com/rdf/people" object="?people"/> <member container="?people" child="?item"/> </query> <rule> <binding subject="?i...
...tem" predicate="http://purl.org/dc/elements/1.1/title" object="?title"/> <action> <label uri="?item" value="?title"/> </action> </rule> </queryset> </template> you can view the example.
The Joy of XUL - Archive of obsolete content
Archive › Mozilla › XUL › The Joy of XUL
separation of presentation from application logic one of the major downfalls of most web applications is the tight coupling of user interface elements with client application logic.
... xbl the extensible bindings language (xbl) is a markup language that defines special new elements, or "bindings" for xul widgets.
Progress Meters - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Progress Meters
xul has a progressmeter element which can be used to create these.
...source view in the next section, we will learn how to add additional elements to the window using html.
Scroll Bars - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Scroll Bars
some elements, such as text boxes, will also add scroll bars as necessary when the content inside is too large.
...a scroll bar creates all of these elements automatically.
Tree Selection - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Tree Selection
getting the selected tree items each item in a tree (that corresponds to treeitem element, if using content tree view) may be selected individually.
...the onselect() event handler may be added to the tree element.
XUL Structure - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › XUL Structure
the three types of chrome packages are: content - windows and scripts the declarations of the windows and the user interface elements contained within them.
...the files located in the global part of a skin package contain the default look for all of the xul interface elements.
Urlbar-icons - Archive of obsolete content
Archive › Mozilla › XUL › Urlbar-icons
« xul reference home [ examples | attributes | properties | methods | related ] the location of ui elements like the bookmarks, feed and go buttons.
... create new image or button child elements to add your own items.
page - Archive of obsolete content
Archive › Mozilla › XUL › page
examples (example needed) attributes inherited from xul element align, allowevents, allownegativeassertions, class, coalesceduplicatearcs, collapsed, container, containment, context, contextmenu, datasources, dir, empty, equalsize, flags, flex, height, hidden, id, insertafter, insertbefore, left, maxheight, maxwidth, menu, minheight, minwidth, mousethrough, observes, ordinal, orient, pack, persist, popup, position, preference-editable, querytype, ref, removeelement, sortdirection, sortresource, sortresource2, statustext, style, template, tooltip, tooltiptext, top, uri, wait-cursor, width ...
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
param - Archive of obsolete content
Archive › Mozilla › XUL › param
the value to bind should be text as a child of the param element.
... ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
popup - Archive of obsolete content
Archive › Mozilla › XUL › popup
« xul reference home the popup element is equivalent to the menupopup element which should be used instead.
... see the documentation on the menupopup element for more information.
Getting started with XULRunner - Archive of obsolete content
Archive › Mozilla › XULRunner › Getting started with XULRunner
main.js: function showmore() { document.getelementbyid("more-text").hidden = false; } for more information about xul see: xul.
... for information about mixing html elements into your xul read adding html elements.
How to enable locale switching in a XULRunner application - Archive of obsolete content
Archive › Mozilla › XULRunner › How to enable locale switching in a XULRunner application
toolkitchromeregistry); var selectedlocale = xulchromereg.getselectedlocale("localeswitchdemo"); var availablelocales = toolkitchromereg.getlocalesforpackage("localeswitchdemo"); // render locale menulist by iterating through the query result from getlocalesforpackage() const xul_ns = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"; var localelistbox = document.getelementbyid("locale-listbox"); var selecteditem = null; while(availablelocales.hasmore()) { var locale = availablelocales.getnext(); var listitem = document.createelementns(xul_ns, "listitem"); listitem.setattribute("value", locale); listitem.setattribute("label", locale); if (locale == selectedlocale) { // is this the current locale?
... var localelistbox = document.getelementbyid("locale-listbox"); var newlocale = localelistbox.selecteditem.value; // write preferred locale to local user config var prefs = components.classes["@mozilla.org/preferences-service;1"].
XUL Explorer - Archive of obsolete content
Archive › Mozilla › XUL Explorer
there is even simple “keyword” help lookup for xul elements.
...it checks for legal element and attribute names, including allowed attributes for a given element.
mozilla.dev.platform FAQ - Archive of obsolete content
Archive › Mozilla › mozilla.dev.platform FAQ
q: when using xul elements <browser/> and <tabbrowser/> the javascript popup windows don't work out of the box, what needs to be implement?
... a: have the browser.chromeurl preference - this should be a xul document containing a <browser type="content-primary"> element in which the popup window's content should get loaded.
xbDesignMode.js - Archive of obsolete content
Archive › Mozilla › xbDesignMode.js
* * contributor(s): doron rosenberg <doron@netscape.com> (original author) * * * * ***** end license block ***** */ /* xbdesignmode a javascript wrapper for browsers that support designmode */ function xbdesignmode(aiframe){ this.meditordocument = null; this.miframeelement = null; // argument is a string, therefore an id if ( (typeof(aiframe) == "string") && (document.getelementbyid(aiframe).tagname.tolowercase()=="iframe") ){ this.miframeelement = document.getelementbyid(aiframe); } else if( (typeof(aiframe)=="object") && (aiframe.tagname.tolowercase() == "iframe") ){ this.miframeelement = aiframe; } else { throw "argument isn't an id of an if...
...rame or an iframe reference"; } if (this.miframeelement.contentdocument){ // gecko this.meditordocument = this.miframeelement.contentdocument; this.meditordocument.designmode = "on"; } else { // ie this.meditordocument = this.miframeelement.contentwindow.document; this.meditordocument.designmode = "on"; // ie needs to reget the document element after designmode was set this.meditordocument = this.miframeelement.contentwindow.document; } } xbdesignmode.prototype.execcommand = function (acommandname, aparam){ if (this.meditordocument) this.meditordocument.execcommand(acommandname, false, aparam); else throw "no meditordocument found"; } xbdesignmode.prototype.setcsscreation = function (ausecss){ if (this.meditordocument) this.meditordocu...
2006-11-17 - Archive of obsolete content
Archive › Newsgroup summaries › mozilla-dev-platform › 2006-11-17
summary: mozilla.dev.platform - november 11th - november 17th, 2006 announcements no announcements this week traffic xulrunner: <browser> not allowing javascript popup windows b notes that when using xul elements <browser/> and <tabbrowser/> the javascript popup windows don't work out of the box and asks what needs to be implement.
...nickolay ponomarev lets us know that processing instructions are now added to xul document's dom this also means, you can no longer use document.firstchild in xul scripts to get the root element of a xul document and the xml-stylesheet and xul-overlay processing instructions outside the prolog no longer have any effect peter.sei...@gmail.com runs into some difficulties deploying xulrunner 1.8 on os x?
NPN_GetValue - Archive of obsolete content
Archive › Plugins › Reference › NPN GetValue
whether smartupdate (former name: asd) is enabled; true=smartupdate enabled, false=not enabled npnvisofflinebool: tells whether offline mode is enabled; true=offline mode enabled, false=not enabled npnvtoolkit: npnvsupportsxembedbool: npnvwindownpobject: returns the npobject * pointer for the dom window object; see getting the page url in npapi plugin for a rough example npnvpluginelementnpobject: npnvsupportswindowless: tells whether the browser supports windowless plugins.
... gecko 1.9.2 note starting with gecko 1.9.2 (firefox 3.6), the variables npnvservicemanager, npnvdomelement, and npnvdomwindow are no longer supported.
-moz-border-bottom-colors - Archive of obsolete content
Archive › Web › CSS › -moz-border-bottom-colors
/* single <color> value */ -moz-border-bottom-colors: #f0f0f0; /* multiple <color> values */ -moz-border-bottom-colors: #f0f0f0 #a0a0a0 #505050 #000000; /* global values */ -moz-border-bottom-colors: inherit; -moz-border-bottom-colors: initial; -moz-border-bottom-colors: unset; when an element has a border that is larger than a single css pixel, each line of pixels uses the next color specified in this property, from the outside in.
... initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete it does not apply if border-style is dashed or dotted.
-moz-border-left-colors - Archive of obsolete content
Archive › Web › CSS › -moz-border-left-colors
/* single <color> value */ -moz-border-left-colors: #f0f0f0; /* multiple <color> values */ -moz-border-left-colors: #f0f0f0 #a0a0a0 #505050 #000000; /* global values */ -moz-border-left-colors: inherit; -moz-border-left-colors: initial; -moz-border-left-colors: unset; when an element has a border that is larger than a single css pixel, each line of pixels uses the next color specified in this property, from the outside in.
... initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete it does not apply if border-style is dashed or dotted.
-moz-border-right-colors - Archive of obsolete content
Archive › Web › CSS › -moz-border-right-colors
/* single <color> value */ -moz-border-right-colors: #f0f0f0; /* multiple <color> values */ -moz-border-right-colors: #f0f0f0 #a0a0a0 #505050 #000000; /* global values */ -moz-border-right-colors: inherit; -moz-border-right-colors: initial; -moz-border-right-colors: unset; when an element has a border that is larger than a single css pixel, each line of pixels uses the next color specified in this property, from the outside in.
... initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete it does not apply if border-style is dashed or dotted.
-moz-border-top-colors - Archive of obsolete content
Archive › Web › CSS › -moz-border-top-colors
/* single <color> value */ -moz-border-top-colors: #f0f0f0; /* multiple <color> values */ -moz-border-top-colors: #f0f0f0 #a0a0a0 #505050 #000000; /* global values */ -moz-border-top-colors: inherit; -moz-border-top-colors: initial; -moz-border-top-colors: unset; when an element has a border that is larger than a single css pixel, each line of pixels uses the next color specified in this property, from the outside in.
... initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete it does not apply if border-style is dashed or dotted.
-ms-filter - Archive of obsolete content
Archive › Web › CSS › -ms-filter
initial value"" (the empty string)applies toall elementsinheritednocomputed valueas specifiedanimation typediscrete remarks the following table lists the most popular dx filters and their standards-based alternatives: dx filter standards-based alternative alpha opacity alphaimageloader <img> or background-image and related properties gradient background-image: linear-gradient() dropshadow...
...a simple way to accomplish this is to give the element a specified height and width, or both.
-ms-hyphenate-limit-lines - Archive of obsolete content
Archive › Web › CSS › -ms-hyphenate-limit-lines
the -ms-hyphenate-limit-lines css property is a microsoft extension specifying the maximum number of consecutive lines in an element that may be ended with a hyphenated word.
... initial valueno-limitapplies toblock container elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values no-limit indicates that hyphenation is not limited based on the number of consecutive hyphenated lines.
-ms-scroll-limit - Archive of obsolete content
Archive › Web › CSS › -ms-scroll-limit
initial valueas each of the properties of the shorthand:-ms-scroll-limit-x-min: 0-ms-scroll-limit-y-min: 0-ms-scroll-limit-x-max: auto-ms-scroll-limit-y-max: autoapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas each of the properties of the shorthand:-ms-scroll-limit-x-min: as specified-ms-scroll-limit-y-min: as specified-ms-scroll-limit-x-max: as specified-ms-scroll-limit-y-max: as specifiedanimation typediscrete syntax the -ms-scroll-limit property is specified as one or more of the following scroll limit values, in the order listed,...
... remarks this property has no effect on non-scrollable elements.
-ms-scroll-rails - Archive of obsolete content
Archive › Web › CSS › -ms-scroll-rails
initial valuerailedapplies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values none the content moves exactly with the user's finger.
... remarks this property has no effect on non-scrollable elements.
-ms-scroll-snap-points-x - Archive of obsolete content
Archive › Web › CSS › -ms-scroll-snap-points-x
initial valuesnapinterval(0px, 100%)applies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values note: a <length-percentage> is a value that can be either a <length> or a <percentaqe>.
... this property has no effect on non-scrollable elements.
-ms-scroll-snap-points-y - Archive of obsolete content
Archive › Web › CSS › -ms-scroll-snap-points-y
initial valuesnapinterval(0px, 100%)applies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values note: a <length-percentage> is a value that can be either a <length> or a <percentaqe>.
... this property has no effect on non-scrollable elements.
-ms-scroll-snap-x - Archive of obsolete content
Archive › Web › CSS › -ms-scroll-snap-x
initial valueas each of the properties of the shorthand:-ms-scroll-snap-type: none-ms-scroll-snap-points-x: snapinterval(0px, 100%)applies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas each of the properties of the shorthand:-ms-scroll-snap-type: as specified-ms-scroll-snap-points-x: as specifiedanimation typediscrete syntax values the -ms-scroll-snap-x shorthand property is specified as one or both of the following values, in order and separated by spaces.
... this property has no effect on non-scrollable elements.
-ms-scroll-snap-y - Archive of obsolete content
Archive › Web › CSS › -ms-scroll-snap-y
initial valueas each of the properties of the shorthand:-ms-scroll-snap-type: none-ms-scroll-snap-points-y: snapinterval(0px, 100%)applies tonon-replaced block-level elements and non-replaced inline-block elementsinheritednocomputed valueas each of the properties of the shorthand:-ms-scroll-snap-type: as specified-ms-scroll-snap-points-y: as specifiedanimation typediscrete syntax values the -ms-scroll-snap-y shorthand property is specified as one or both of the following values, in order and separated by spaces.
... this property has no effect on non-scrollable elements.
-ms-scrollbar-arrow-color - Archive of obsolete content
Archive › Web › CSS › -ms-scrollbar-arrow-color
the -ms-scrollbar-arrow-color css property is a microsoft extension that specifies the color of the arrow elements of a scroll arrow.
... initial valuebuttontextapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values <color> the color of the scroll arrows of the scroll bar.
-ms-scrollbar-base-color - Archive of obsolete content
Archive › Web › CSS › -ms-scrollbar-base-color
the -ms-scrollbar-base-color css property is a microsoft extension that specifies the base color of the main elements of a scroll bar.
... initial valuedepends on user agentapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values <color> the base color of the main elements of a scroll bar.
-ms-touch-select - Archive of obsolete content
Archive › Web › CSS › -ms-touch-select
the -ms-touch-select css property is a microsoft extension that toggles the gripper visual elements that enable touch text selection.
... initial valuegrippersapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values grippers the grippers are always on.
:-moz-full-screen-ancestor - Archive of obsolete content
Archive › Web › CSS › :-moz-full-screen-ancestor
the :-moz-full-screen-ancestor css pseudo-class is a mozilla extension that represents all ancestors of the full-screen element, except containing frames in parent documents, which are the full-screen element in their own documents.
... however, those elements' ancestors have this pseudo-class applied to them.
::-ms-check - Archive of obsolete content
Archive › Web › CSS › ::-ms-check
the ::-ms-check css pseudo-element is a microsoft extension that represents checkboxes and radio button groups created by <input type="checkbox"> and <input type="radio">.
... this pseudo-element is supported only in internet explorer and microsoft edge.
::-ms-clear - Archive of obsolete content
Archive › Web › CSS › ::-ms-clear
the ::-ms-clear css pseudo-element creates a clear button at the edge of an <input type="text"> text control that clears the current value.
... this pseudo-element is non-standard, supported only in internet explorer 10, internet explorer 11, and microsoft edge.
::-ms-fill - Archive of obsolete content
Archive › Web › CSS › ::-ms-fill
the ::-ms-fill css pseudo-element is a microsoft extension that represents a progress bar displayed by <progress>.
... this pseudo-element is available only in internet explorer 10, internet explorer 11, and microsoft edge.
::-ms-reveal - Archive of obsolete content
Archive › Web › CSS › ::-ms-reveal
the ::-ms-reveal css pseudo-element is a microsoft extension that is used to display a password reveal button for use with a password field created by <input type="password">.
... the ::-ms-reveal pseudo-element is specific to internet explorer 10 and later.
::-ms-ticks-after - Archive of obsolete content
Archive › Web › CSS › ::-ms-ticks-after
the ::-ms-ticks-after css pseudo-element is a microsoft extension that applies one or more styles to the tick marks that appear after the track of a slider control.
... it is possible to use the ::-ms-ticks-after, ::-ms-ticks-before, and ::-ms-track pseudo-elements together.
::-ms-ticks-before - Archive of obsolete content
Archive › Web › CSS › ::-ms-ticks-before
the ::-ms-ticks-before css pseudo-element is a microsoft extension that applies one or more styles to the tick marks that appear before the track of a slider control.
... it is possible to use the ::-ms-ticks-after, ::-ms-ticks-before, and ::-ms-track pseudo-elements together.
::-ms-track - Archive of obsolete content
Archive › Web › CSS › ::-ms-track
the ::-ms-track css pseudo-element is a microsoft extension that represents the track of a slider control.
... it is possible to use the ::-ms-ticks-after, ::-ms-ticks-before, and ::-ms-track pseudo-elements together.
E4X - Archive of obsolete content
Archive › Web › E4X
to fully enable e4x, the <script> element needs to have the mime type "text/javascript;e4x=1" (i.e., have an attribute of the form type="text/javascript;e4x=1").
... the difference between the two modes is that without the "e4x=1" mime type, any statement-level xml/html comment literals (<!--...-->) are ignored for backwards compatibility with the comment hiding trick, and cdata sections (<![cdata[...]]>) are not parsed as cdata literals (which leads to a js syntax error in html since html's <script> element produces an implicit cdata section, and therefore cannot contain explicit cdata sections).
Array.observe() - Archive of obsolete content
Archive › Web › JavaScript › Array.observe
an array of the removed elements.
...the number of elements added.
VBArray.getItem - Archive of obsolete content
Archive › Web › JavaScript › Microsoft Extensions › VBArray › getItem
dimension1, ..., dimensionn specifies the exact location of the desired element of the vbarray.
...the second part is javascript code that iterates the visual basic safe array and prints out the contents of each element.
New in JavaScript 1.2 - Archive of obsolete content
Archive › Web › JavaScript › New in JavaScript › 1.2
it no longer converts undefined elements to null and sorts them to the high end of the array.
... it can take a limit count so that it won't include trailing empty elements in the resulting array.
LiveConnect Overview - Archive of obsolete content
Archive › Web › LiveConnect › LiveConnect Overview
for example, the following code creates the javaarray x with ten elements of type int: var x = java.lang.reflect.array.newinstance(java.lang.integer, 10); like the javascript array object, javaarray has a length property which returns the number of elements in the array.
... unlike array.length, javaarray.length is a read-only property, because the number of elements in a java array are fixed at the time of creation.
JavaArray - Archive of obsolete content
Archive › Web › LiveConnect Reference › JavaArray
use zero-based indexes to access the elements in a javaarray object, just as you do to access elements in an array in java.
... properties length: the number of elements in the java array represented by javaarray.
XForms API Reference - Archive of obsolete content
Archive › Web › XForms › API Reference
note the word beginning :-) naming convention the xforms interfaces has the following naming convention: nsixforms...element interfaces implemented by the c++ part of a control nsixformsns...element interfaces extending xforms specification interfaces nsixforms...uielement interfaces implemented by the js part of a control nsixforms...accessors interface exposing states about the bound instance node for a given control frozen interfaces nsixformsmodelelement the model interface experimental interfaces nsixformsdelegate the delegate interface for xforms:custom_controls nsixformsaccessors the accessors interface for xforms:custo...
...m_controls nsixformsnsmodelelement custom extension(s) to the nsixformsmodelelement interface nsixformsnsinstanceelement custom extension(s) to the instance element ...
XForms Custom Controls Examples - Archive of obsolete content
Archive › Web › XForms › Custom Controls Examples
output showing images <binding id="output-image" extends="chrome://xforms/content/xforms.xml#xformswidget-base"> <content> <html:div> <html:img anonid="content"/> </html:div> </content> <implementation implements="nsixformsuiwidget"> <method name="refresh"> <body> var img = document.getanonymouselementbyattribute(this, "anonid", "content"); img.setattribute("src", this.stringvalue); return true; </body> </method> </implementation> </binding> output showing xhtml <binding id="output-xhtml" extends="chrome://xforms/content/xforms-xhtml.xml#xformswidget-output"> <content> <children includes="label"/> <xhtml:div class="xf-value" anonid="content"></xhtml:div> <childr...
... var val = this.stringvalue; var newdom = this.domparser.parsefromstring(val, "text/xml"); var impnode = document.importnode(newdom.firstchild, true); // get content node, clean it, and update it var content = document.getanonymouselementbyattribute(this, "anonid", "content"); if (content.firstchild) { content.removechild(content.firstchild); } content.appendchild(impnode); return true; </body> </method> </implementation> </binding> ...
RFE to the Custom Controls Interfaces - Archive of obsolete content
Archive › Web › XForms › RFE › Custom Controls Interfaces
in short, we have the following interfaces: nsixformsaccessors - serves to get/set the value of the instance data node that the xforms element is bound to as well as getting the various states of that node nsixformsdelegate - used to obtain the nsixformsaccessors interface nsixformsuiwidget - used by the xforms processor to update the value/state of an xforms element when its bound node's value/state is changed our current mechanism that allows authors to build custom controls assumes that the controls will be bound to instance nodes of simple content type.
... this means that the bound node is not allowed to contain element nodes.
XForms Styling - Archive of obsolete content
Archive › Web › XForms › Styling XForms
triggers use appearance="minimal" to be able to style buttons portability the mozilla xforms extension is one of the few xforms processors which allow for styling of the xforms elements directly, using mostly standard css.
...however, most of the time the transition is straight-forward: view the source after processing of your xforms document, and map the old styles to the new elements.
Using XForms and PHP - Archive of obsolete content
Archive › Web › XForms › XForms And Php
to get a dom document on php 4 i usually do something like this: $data = $http_raw_post_data; $dom = domxml_open_mem($data); $root = $dom->document_element(); ...
... $newnode = $dom->create_element("boo"); $root->append_child($newnode); ...
Displaying a graphic with audio samples - Archive of obsolete content
Archive › Web Standards › Displaying the Mozilla logo with the Audio Samples
<!doctype html> <html> <head> <title>javascript spectrum example</title> </head> <body> <audio id="audio-element" src="revolve.ogg" controls="true" style="width: 512px;"> </audio> <div><canvas id="fft" width="512" height="200"></canvas></div> <img id="mozlogo" style="display:none" src="mozilla2.png"></img> <script> var canvas = document.getelementbyid('fft'), ctx = canvas.getcontext('2d'), channels, rate, framebufferlength, fft; function loadedmetadata() { channels...
...fillrect (0,0, canvas.width, canvas.height); ctx.fillstyle = "rgb(255,255,255)"; for (var i = 0; i < signal.length; i++ ) { // multiply spectrum by a zoom value magnitude = signal[i] * 1000; // draw rectangle bars for each frequency bin ctx.fillrect(i * 4, canvas.height, 3, -magnitude); } ctx.drawimage(document.getelementbyid('mozlogo'),0,0, canvas.width, canvas.height); } var audio = document.getelementbyid('audio-element'); audio.addeventlistener('mozaudioavailable', audioavailable, false); audio.addeventlistener('loadedmetadata', loadedmetadata, false); </script> </body> </html> ...
Common causes of memory leaks in extensions - Extensions
Extensions › Common causes of memory leaks in extensions
for example, the following code snippets — part of a bootstrap.js — will leak: function leakref() {} function modifydocument(document) { var a = document.createelement("a"); document.body.appendchild(a); // the new dom node holding a reference to leakref will prevent // that function object from being garbage collected and hence // will leak the whole bootstrap compartment.
... consider the following example: var myobserver = { observe: function(subject, topic, data) { window.document.documentelement.setattribute( "pbm", (data == "enter") ?
Index - Game development
Games › Index
this can be done using html — the phaser framework will generate the required <canvas> element.
...this can be done using html and the <canvas> element.
Introduction to game development for the Web - Game development
Games › Introduction
part of html is the <canvas> element, which provides one way to do 2d graphics.
... html audio the <audio> element lets you easily play simple sound effects and music.
Tiles and tilemaps overview - Game development
Games › Techniques › Tilemaps
positioning and camera in all scrolling games, we need a translation between world coordinates (the position where sprites or other elements are located in the level or game world) and screen coordinates (the actual position where those elements are rendered on the screen).
...the most common case is to use this logic grid to handle collisions, but other uses are possible as well: character spawning points, detecting whether some elements are placed together in the right way to trigger a certain action (like in tetris or bejeweled), path-finding algorithms, etc.
Visual typescript game engine - Game development
Games › visual typescript game engine
* - dragging is script for dragging dom elements.
...yle/ | | ├── styles.css | ├── libs/ | | ├── class/ | | | ├── networking/ | | | | ├── rtc-multi-connection/ | | | | | ├── filebufferreader.js | | | | | ├── rtcmulticonnection2.js | | | | | ├── rtcmulticonnection3.js | | | | | ├── linkify.js | | | | | ├── gethtmlmediaelement.js | | | | | ├── socket.io.js | | | | ├── broadcaster-media.ts | | | | ├── broadcaster.ts | | | | ├── connector.ts | | | | ├── network.ts | | | ├── visual-methods/ | | | | ├── sprite-animation.ts | | | | ├── text.ts | | | | ├── texture.ts | | | ├── browser.ts |...
CSS - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › CSS
the browser applies css style declarations to selected elements to display them properly.
...css usually styles html elements, but can be also used with other markup languages like svg or xml.
Canvas - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Canvas
the canvas element is part of html5 and allows for dynamic, scriptable rendering of 2d and 3d shapes and bitmap images.
... learn more general knowledge canvas on wikipedia learning resources the canvas tutorial on mdn technical information the html <canvas> element on mdn the canvas general documentation on mdn canvasrenderingcontext2d: the canvas 2d drawing api the canvas 2d api specification ...
Grid container - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Grid Container
using the value grid or inline-grid on an element turns it into a grid container using css grid layout, and any direct children of this element become grid items.
... when an element becomes a grid container it establishes a grid formatting context.
Metadata - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Metadata
for example, an html document is data, but html can also contain metadata in its <head> element that describes the document — for example who wrote it, and its summary.
... learn more general knowledge metadata on wikipedia html metadata the <meta> element on mdn ...
Shadow tree - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Shadow tree
this provides a way to encapsulate implementation details, which is especially useful for custom elements and other advanced design paradigms.
... learn more general knowledge using shadow dom technical information element.shadowroot and element.attachshadow() shadowroot <slot> ...
Style origin - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Style origin
if no other styles are applied to content, the user agent origin's styles are used while rendering elements.
... the style origins are used to determine where to stop rolling back (or backtracking through) the cascade of styles that have been applied to an element when removing styles, such as when using the unset or revert keywords.
Property (CSS) - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › property › CSS
a css property is a characteristic (like color) whose associated value defines one aspect of how the browser should display the element.
... here's an example of a css rule: /* "div" is a selector indicating that all the div elements */ /* in the document will be styled by that rule */ div { /* the property "color" with the value "black" indicates */ /* that the text will have the color black */ color: black; /* the property "background-color" with the value "white" indicates */ /* that the background color of the elements will be white */ background-color: white; } learn more general knowledge learn css technical reference the css reference on mdn the css working group current work ...
Overflowing content - Learn web development
Learn › CSS › Building blocks › Overflowing content
the overflow property the overflow property is how you take control of an element's overflow.
... previous overview: building blocks next in this module cascade and inheritance css selectors type, class, and id selectors attribute selectors pseudo-classes and pseudo-elements combinators the box model backgrounds and borders handling different text directions overflowing content values and units sizing items in css images, media, and form elements styling tables debugging css organizing your css ...
Test your skills: The Box Model - Learn web development
Learn › CSS › Building blocks › Selectors › Box Model Tasks
the box model three in this example the inline element has a margin, padding and border however the lines above and below are overlapping it.
... what can you add to your css to cause the size of the margin, padding, and border to be respected by the other lines, while still keeping the element inline?
Test your skills: values and units - Learn web development
Learn › CSS › Building blocks › Values tasks
all <p> elements should be 16 pixels.
... a <p> element that is directly after an <h1> should be 120%.
Test your skills: Multicol - Learn web development
Learn › CSS › CSS layout › Multicol skills
you will be working through three small tasks which use different elements of the material you have just covered.
... multicol three cause the element containing the heading and subheading to span across all columns so it looks like the image.
CSS layout - Learn web development
Learn › CSS › CSS layout
normal flow elements on webpages lay themselves out according to normal flow - until we do something to change that.
... positioning positioning allows you to take elements out of the normal document layout flow, and make them behave differently, for example sitting on top of one another, or always remaining in the same place inside the browser viewport.
Using CSS generated content - Learn web development
Learn › CSS › Howto › Generated content
examples text content css can insert text content before or after an element.
... image content to add an image before or after an element, you can specify the url of an image file in the value of the content property.
Typesetting a community school homepage - Learn web development
Learn › CSS › Styling text › Typesetting a homepage
if the online editor you are using doesn't have a separate css panel, feel free to put it in a <style> element in the head of the document.
... give your headings and other element types appropriate font-sizes defined using a suitable relative unit.
Example 4 - Learn web development
Learn › Forms › How to build custom form controls › Example 4
ow) { var optlist = select.queryselector('.optlist'); optlist.classlist.toggle('hidden'); } function highlightoption(select, option) { var optionlist = select.queryselectorall('.option'); optionlist.foreach(function (other) { other.classlist.remove('highlight'); }); option.classlist.add('highlight'); }; function updatevalue(select, index) { var nativewidget = select.previouselementsibling; var value = select.queryselector('.value'); var optionlist = select.queryselectorall('.option'); nativewidget.selectedindex = index; value.innerhtml = optionlist[index].innerhtml; highlightoption(select, optionlist[index]); }; function getindex(select) { var nativewidget = select.previouselementsibling; return nativewidget.selectedindex; }; // ------------- // // event b...
...}); select.addeventlistener('blur', function (event) { deactivateselect(select); }); }); }); window.addeventlistener('load', function () { var selectlist = document.queryselectorall('.select'); selectlist.foreach(function (select) { var optionlist = select.queryselectorall('.option'), selectedindex = getindex(select); select.tabindex = 0; select.previouselementsibling.tabindex = -1; updatevalue(select, selectedindex); optionlist.foreach(function (option, index) { option.addeventlistener('click', function (event) { updatevalue(select, index); }); }); select.addeventlistener('keyup', function (event) { var length = optionlist.length, index = getindex(select); if (event.keycode === 27) { deacti...
Example 5 - Learn web development
Learn › Forms › How to build custom form controls › Example 5
ow) { var optlist = select.queryselector('.optlist'); optlist.classlist.toggle('hidden'); } function highlightoption(select, option) { var optionlist = select.queryselectorall('.option'); optionlist.foreach(function (other) { other.classlist.remove('highlight'); }); option.classlist.add('highlight'); }; function updatevalue(select, index) { var nativewidget = select.previouselementsibling; var value = select.queryselector('.value'); var optionlist = select.queryselectorall('.option'); optionlist.foreach(function (other) { other.setattribute('aria-selected', 'false'); }); optionlist[index].setattribute('aria-selected', 'true'); nativewidget.selectedindex = index; value.innerhtml = optionlist[index].innerhtml; highlightoption(select, optionlist[index]);...
... }; function getindex(select) { var nativewidget = select.previouselementsibling; return nativewidget.selectedindex; }; // ------------- // // event binding // // ------------- // window.addeventlistener("load", function () { var form = document.queryselector('form'); form.classlist.remove("no-widget"); form.classlist.add("widget"); }); window.addeventlistener('load', function () { var selectlist = document.queryselectorall('.select'); selectlist.foreach(function (select) { var optionlist = select.queryselectorall('.option'), selectedindex = getindex(select); select.tabindex = 0; select.previouselementsibling.tabindex = -1; updatevalue(select, selectedindex); optionlist.foreach(function (option, index) { option.addeventlistener('mouseover'...
Test your skills: Advanced styling - Learn web development
Learn › Forms › Test your skills: Advanced styling
you'll find that some browsers will not behave in terms of the form element's height.
...we've made one available in the same directory as our html files — see search-24px.png — plus a <div> element after the search input to help you attach it, should you need it.
Test your skills: Form structure - Learn web development
Learn › Forms › Test your skills: Form structure
mark up each text label with an appropriate element so that it is semantically associated with its respective form field.
... add a suitable set of structural elements around the label/field pairs to separate them out.
Example - Learn web development
Learn › Forms › Your first form › Example
d have the same font settings by default, textarea are set with a monospace font */ font: 1em sans-serif; /* to give the same size to all text field */ width: 300px; -moz-box-sizing: border-box; box-sizing: border-box; /* to harmonize the look & feel of text field border */ border: 1px solid #999; } input:focus, textarea:focus { /* to give a little highligh on active elements */ border-color: #000; } textarea { /* to properly align multiline text field with their label */ vertical-align: top; /* to give enough room to type some text */ height: 5em; /* to allow users to resize any textarea vertically it works only on chrome, firefox and safari */ resize: vertical; } .button { /* to position the buttons to the same position of the text fields *...
.../ padding-left: 90px; /* same size as the label elements */ } button { /* this extra magin represent the same space as the space between the labels and their text fields */ margin-left: .5em; } result ...
The web and web standards - Learn web development
Learn › Getting started with the web › The web and web standards
for example, the html living standard describes exactly how html (all the html elements, and their associated apis, and other surrounding technologies) should be implemented.
... html, css, and javascript html, css, and javascript are the main three technologies you'll use to build a website: hypertext markup language, or html, is a markup language consisting of different elements you can wrap (mark up) content in to give it meaning (semantics) and structure.
Tips for authoring fast-loading HTML pages - Learn web development
Learn › HTML › Howto › Author fast-loading HTML pages
this technique works best with elements that will have limited dimensions, and will not work for every use of a background image.
... tables should use the css selector: property combination: table-layout: fixed; and should specify widths of columns using the <col> and the <colgroup> elements.
Test your skills: HTML text basics - Learn web development
Learn › HTML › Introduction to HTML › Test your skills: HTML text basics
html text basics 1 in this task we want you to mark up the provided html using semantic heading and paragraph elements.
... html text basics 3 in this task you are provided with a paragraph, and your aim is to use some inline elements to mark up a couple of appropriate words with strong importance, and a couple with emphasis.
Test your skills: HTML images - Learn web development
Learn › HTML › Multimedia and embedding › Images in HTML › Test your skills: HTML images
give the <img> element an appropriate width and height so that it displays at the correct aspect ratio, and enough space is left on the page to display it.
...what you need to do here is add elements that will associate the image with the caption.
Structuring the web with HTML - Learn web development
Learn › HTML
html is used to specify whether your web content should be recognized as a paragraph, list, heading, link, image, multimedia player, form, or one of many other available elements or even a new element that you define.
...n then move on to learning about more advanced topics such as: css, and how to use it to style html (for example alter your text size and fonts used, add borders and drop shadows, layout your page with multiple columns, add animations and other visual effects.) javascript, and how to use it to add dynamic functionality to web pages (for example find your location and plot it on a map, make ui elements appear/disappear when you toggle a button, save users' data locally on their computers, and much much more.) modules this topic contains the following modules, in a suggested order for working through them.
Functions — reusable blocks of code - Learn web development
Learn › JavaScript › Building blocks › Functions
source code) from our loops article, we included a custom draw() function that looked like this: function draw() { ctx.clearrect(0,0,width,height); for (let i = 0; i < 100; i++) { ctx.beginpath(); ctx.fillstyle = 'rgba(255,0,0,0.5)'; ctx.arc(random(width), random(height), random(50), 0, 2 * math.pi); ctx.fill(); } } this function draws 100 random circles inside a <canvas> element.
...you generally use an anonymous function along with an event handler, for example the following would run the code inside the function whenever the associated button is clicked: const mybutton = document.queryselector('button'); mybutton.onclick = function() { alert('hello'); } the above example would require there to be a <button> element available on the page to select and click.
Test your skills: Events - Learn web development
Learn › JavaScript › Building blocks › Test your skills: Events
dom manipulation: considered useful some of the questions below require you to write some dom manipulation code to complete them — such as creating new html elements, setting their text contents to equal specific string values, and nesting them inside existing elements on the page — all via javascript.
... events 3 in our final events-related task, you need to set an event listener on the <button>s' parent element (<div class="button-bar"> ...
Test your skills: Loops - Learn web development
Learn › JavaScript › Building blocks › Test your skills: Loops
dom manipulation: considered useful some of the questions below require you to write some dom manipulation code to complete them — such as creating new html elements, setting their text contents to equal specific string values, and nesting them inside existing elements on the page — all via javascript.
... loops 1 in our first looping task we want you start by creating a simple loop that goes through all the items in the provided myarray and prints them out on the screen inside list items (i.e., <li> elements), which are appended to the provided list.
Client-side web APIs - Learn web development
Learn › JavaScript › Client-side web APIs
drawing graphics the browser contains some very powerful graphics programming tools, from the scalable vector graphics (svg) language, to apis for drawing on html <canvas> elements, (see the canvas api and webgl).
... video and audio apis html5 comes with elements for embedding rich media in documents — <video> and <audio> — which in turn come with their own apis for controlling playback, seeking, etc.
Adding features to our bouncing balls demo - Learn web development
Learn › JavaScript › Objects › Adding bouncing balls features
if the online editor you are using doesn't have separate javascript/css panels, feel free to put them inline <script>/<style> elements inside the html page.
... implementing the score counter to implement the score counter, follow the following steps: in your html file, add a <p> element just below the <h1> element containing the text "ball count: ".
JavaScript object basics - Learn web development
Learn › JavaScript › Objects › Basics
this contains very little — a <script> element for us to write our source code into.
... when you accessed the document object model using lines like this: const mydiv = document.createelement('div'); const myvideo = document.queryselector('video'); you were using methods available on an instance of the document class.
Client-Server Overview - Learn web development
Learn › Server-side › First steps › Client-Server overview
eny allow: get x-cache-info: caching content-length: 41823 <!doctype html> <html lang="en-us" dir="ltr" class="redesign no-js" data-ffo-opensanslight=false data-ffo-opensans=false > <head prefix="og: http://ogp.me/ns#"> <meta charset="utf-8"> <meta http-equiv="x-ua-compatible" content="ie=edge"> <script>(function(d) { d.classname = d.classname.replace(/\bno-js/, ''); })(document.documentelement);</script> ...
... the diagram below shows the main elements of the "team coach" website, along with numbered labels for the sequence of operations when the coach accesses their "best team" list.
Componentizing our Svelte app - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Svelte components
take into account that it won't just show or hide the markup based on the condition — it will dynamically add and remove the elements from the dom, depending on the condition.
...thanks to svelte reactivity, assigning the value of the editing variable will be enough to display the correct html elements.
Package management basics - Learn web development
Learn › Tools and testing › Understanding client-side tools › Package management
without modern build tools, dependencies like this might be included in your project using a simple <script> element, but this might not work right out of the box and you will likely need some modern tooling to bundle your code and dependencies together when they are released on the web.
... if we had avoided any development tools and pointed a <script src=””> element to a hosted version of date-fns, roughly the same thing would have happened — all of the library would be downloaded when our example page is loaded in a browser.
Multiprocess on Windows
Mozilla › Accessibility › Multiprocess on Windows
if your interface outputs an array of interfaces, the interceptor would only wrap the first element in the array, because it cannot distinguish between scalars and arrays.
...this should be the iid that we want the interceptor to actually use when wrapping the array element.
Adding a new CSS property
Mozilla › Adding a new style property
the style system is the part of the code in gecko that is responsible for producing a computed value for every property for every element.
... in any case where the computation you do might vary between elements that match the same list of style rules, you need to set the canstoreinruletree variable to false.
Creating MozSearch plugins
Mozilla › Creating MozSearch plugins
the only difference is the root element and xml namespace.
...firefox will use the above search engine description to construct the following search url: http://search.yahoo.com/search?p=mozilla&ei=utf-8&fr=moz2 if the user clicks the magnifying glass icon in the search bar, or chooses the web search option in the tools menu when the search bar isn't visible, the browser will take them to http://search.yahoo.com/, the value of the <searchform> element.
Debugging Table Reflow
Mozilla › Debugging › Debugging Table Reflow
look there especially how the maxelementsize (mes) and desired size are propagated.
...it can be invoked by set gecko_block_debug_flags=reflow the available options are: reflow really-noisy-reflow max-element-size space-manager verify-lines damage-repair lame-paint-metrics lame-reflow-metrics disable-resize-opt these options can be combined with a comma separated list messages generated by the reflow switch: block(div)(1)@00be5ac4: reflowing dirty lines computedwidth=9000 computedheight=1500 this message is generated inside of nsresult nsblockframe::reflowdirtylines(nsblockreflowstate& astate) it first shows the block id and address and then the computed width and height from the htmlreflowstate.
Debugging on Windows
Mozilla › Debugging › Debugging on Windows
nsg|g)etter_*addrefs.*=nostepinto ns_convertutf.* ; might be too broad: (ns|promise)[^\:]*[ss]tring.* ...add common functions to this list should probably make a .reg file for easy importing obtaining stdout and other file handles running the following command in the command window in visual studio returns the value of stdout, which can be used with various debugging methods (such as nsgenericelement::list) that take a file* param: debug.evaluatestatement {,,msvcr80d}(&__iob_func()[1]) (alternatively you can evaluate {,,msvcr80d}(&__iob_func()[1]) in the quickwatch window) similarly, you can open a file on the disk using fopen: >debug.evaluatestatement {,,msvcr80d}fopen("c:\\123", "w") 0x10311dc0 { ..snip..
... } >debug.evaluatestatement ((nsgenericelement*)0x03f0e710)->list((file*)0x10311dc0, 1) <void> >debug.evaluatestatement {,,msvcr80d}fclose((file*)0x10311dc0) 0x00000000 note that you may not see the debugging output until you flush or close the file handle.
Cross Process Object Wrappers
Mozilla › Firefox › Multiprocess Leftovers › Cross Process Object Wrappers
*/ var button = content.document.getelementbyid("click-me"); button.addeventlistener("mouseover", function (event) { sendasyncmessage("my-addon-message", {}, { element : event.target }); }, false); // chrome script /* load the frame script, then listen for the message.
...*/ browsermm.loadframescript("chrome://my-addon/content/frame-script.js", false); browsermm.addmessagelistener("my-addon-message", function(message) { let wrapper = message.objects.element; wrapper.addeventlistener("click", function() { console.log("they clicked"); }); }); mapping content documents to xul browsers a common pattern is to get the xul <browser> that corresponds to a content document.
Limitations of frame scripts
Mozilla › Firefox › Multiprocess Leftovers › Limitations of frame scripts
examples of apis add-on authors should avoid in frame scripts: nsifileinputstream nsifileoutputstream constructing a file from a string or nsifile (but file objects can be sent via message manager) htmlinputelement.mozsetfilenamearray (alternative: mozsetfilearray) xul and browser ui anything that tries to touch the browser ui or anything to do with xul is likely to not work in the content process.
...the exceptions are: content-document-global-created document-element-inserted outer-window-destroyed inner-window-destroyed dom-window-destroyed these must be registered in the content process.
Limitations of frame scripts
Mozilla › Firefox › Multiprocess Leftovers › Message Manager › Limitations of frame scripts
for example: nsifileinputstream nsifileoutputstream constructing a file from a string or nsifile (but file objects can be sent via message manager) htmlinputelement.mozsetfilenamearray (alternative: mozsetfilearray) file: uris, see bug 1187099 <...> xul and browser ui anything that tries to touch the browser ui or anything to do with xul is likely not to work in the content process.
...the exceptions are: content-document-global-created document-element-inserted outer-window-destroyed inner-window-destroyed dom-window-destroyed these must be registered in the content process.
Performance
Mozilla › Firefox › Multiprocess Leftovers › Message Manager › Performance
te-configuration", function(message) { maincopy = message.data.newconfig; }) funtion getmaincopy() { return maincopy; } // framescript.js components.utils.import("resource://my-addon/processmodule.jsm") // getmaincopy() used by other functions don't register observers (and other callbacks to global services) in a frame script bad: //framescript.js services.obs.addobserver("document-element-inserted", { observe: function(doc, topic, data) { if(doc.ownerglobal.top != content) return; // bail out if this is for another tab decoratedocument(doc); } }) observer notifications get fired for events that happen anywhere in the browser, they are not scoped to the current tab.
...remove interactive ui elements that would be inert with the addon ...
Message manager overview
Mozilla › Firefox › Multiprocess Leftovers › Types of message manager
it's a chromemessagebroadcaster object, which implements the following interfaces: nsiframescriptloader nsimessagelistenermanager nsimessagebroadcaster the window message manager can be accessed as a property of the browser window: // chrome script let windowmm = window.messagemanager; browser message manager the browser message manager is specific to a single xul <browser> element (which essentially corresponds to a single tab): loadframescript() loads the given script only into its <browser> sendasyncmessage() sends the message only to that <browser>.
... it's a chromemessagesender object, which implements the following interfaces: nsiprocesschecker nsiframescriptloader nsimessagelistenermanager nsimessagesender the browser message manager can be accessed as a property of the xul <browser> element: // chrome script let browsermm = gbrowser.selectedbrowser.messagemanager; process message managers process message managers correspond to process boundaries, and enable code running in different processes to communicate.
Security best practices for Firefox front-end engineers
Mozilla › Firefox › Security best practices for Firefox front-end engi
we use our built-in sanitizer with the following flags: sanitizerallowstyle sanitizerallowcomments sanitizerdropforms sanitizerlogremovals the sanitizer removes all scripts (script tags, event handlers) and form elements (form, input, keygen, option, optgroup, select, button, datalist).
... the canonical truth for the list of whitelisted elements is the source code.
mozbrowsercontextmenu
Mozilla › Gecko › Chrome › API › Browser API › mozbrowsercontextmenu
contextmenu a menu object (see the menu object, below) representing a custom menu defined via <menu> / <menuitem> elements and pointed to via a contextmenu attribute on the dom element clicked on, which contains the menu's id.
... the menu object an object representing a custom menu defined via <menu> / <menuitem> elements and pointed to via a contextmenu attribute on the dom element clicked on, which contains the menu's id.
::-moz-tree-row
Mozilla › Gecko › Chrome › CSS › ::-moz-tree-row
the ::-moz-tree-row css pseudo-element is used to select rows and apply styles to tree rows.
... associated elements treerow syntax treechildren::-moz-tree-row { style properties } style properties background border margin outline padding display -moz-appearance examples treechildren::-moz-tree-row( foo bar ) { margin: 2%; } ...where...
overflow-clip-box
Mozilla › Gecko › Chrome › CSS › overflow-clip-box
initial valuepadding-boxapplies toall elementsinheritednomediavisualcomputed valueas specifiedanimation typediscretecanonical orderthe unique non-ambiguous order defined by the formal grammar syntax values padding-box this keyword makes the clipping be related to the padding box.
...l <div class="things"> <input value="abcdefghijklmnopqrstuvwxyzÅÄÖ" class="scroll padding-box"> <div class="scroll padding-box"><span>abcdefghijklmnopqrstuvwxyzÅÄÖ</span></div> </div> css .scroll { overflow: auto; padding: 0 30px; width: 6em; border: 1px solid black; background: lime content-box; } .padding-box { overflow-clip-box: padding-box; } js function scrollsomeelements() { var elms = document.queryselectorall('.scroll'); for (i=0; i < elms.length; ++i) { elms[i].scrollleft=80; } } var elt = document.queryelementsbytagname('body')[0]; elt.addeventlistener("load", scrollsomeelements, false); result specifications this property has been proposed to the w3c csswg; it is not yet on the standard track but, if accepted, should appear in css overflow ...
Gecko Keypress Event
Mozilla › Gecko › Gecko keypress event
a handler on the innermost element should handle a key event even when the event does not match exactly and there is an outer element with a handler that does match exactly (bug 433192).
...xul application developers should use key elements for handling accel keys, so as to make use of the handling logic already provided for these elements.
Getting from Content to Layout
Mozilla › Getting from Content to Layout
changes to a document originate in the content tree (from dom modification by scripting, insertion of elements from the parser, etc.) and are propogated to the layout tree through magic that primarily resides in //github.com/realityripple/uxp/blob/master/layout/base/nscssframeconstructor.cpp the frame constructor implements nsimutationobserver which allows it to "watch" the content tree.
... elements that need to be restyled are marked with flags (e.g element_has_pending_restyle) and are stored in the mpendingrestyles hashtable.
HTTP Cache
Mozilla › HTTP cache
the form is following (currently pending in bug 968593): a,b,i1009,p, regular expression: (.([^,]+)?,)* the first letter is an identifier, identifiers are to be alphabetically sorted and always terminate with ',' a - when present the scope is belonging to an anonymous load b - when present the scope is in browser element load i - when present must have a decimal integer value that represents an app id the scope belongs to, otherwise there is no app (app id is considered 0) p - when present the scope is of a private browsing load, this never persists cachestorageservice keeps a global hashtable mapped by the scope key.
... elements in this global hashtable are hashtables of cache entries.
How to implement a custom autocomplete search component
Mozilla › How to implement custom autocomplete search component
the xul textbox element supports an autocomplete mechanism that is used to create a textbox with a popup containing a list of possible completions for what the user has started to type.
...param previousresult - a previous result to use for faster searchinig * @param listener - a listener to notify when the search is complete */ startsearch: function(searchstring, searchparam, result, listener) { // this autocomplete source assumes the developer attached a json string // to the the "autocompletesearchparam" attribute or "searchparam" property // of the <textbox> element.
IPDL Tutorial
Mozilla › IPDL › Tutorial
hild: rpc init(nscstring pluginpath) returns (bool ok); // this part creates constructor messages rpc pplugininstance(nscstring type, nscstring[] args) returns (int rv); }; // ----- file pplugininstance.ipdl include protocol pplugin; rpc protocol pplugininstance { manager pplugin; child: rpc __delete__(); setsize(int width, int height); }; this example has several new elements: `include protocol` imports another protocol declaration into this file.
... given the simple protocols: // --- pexample.ipdl include protocol psubexample; async protocol pexample { manages psubexample; parent: async pchild(); }; // --- psubexample.ipdl include protocol pexample; async protocol psubexample { manager pexample; child: async __delete__(); }; we assume that there is a psubexampleparent/child pair in existence, such that some element now wishes to trigger the protocol's deletion from the parent side.
Introduction to Layout in Mozilla
Mozilla › Introduction to Layout in Mozilla
d walk-through incrementalism future tech-talks wrap-up, q&a basic data flow source document arrives via network apis incrementally “pumped” through the single-threaded layout engine parse, compute style, render; repeat css used for rendering all content content theoretically separate from “presentation” key data structures content node elements, attributes, leaves dom frame rectangular formatting primitive geometric information [0..n] per content node 2nd thru nth are “continuations” style context non-geometric information may be shared by adjacent frames reference counted, owned by frame view clipping, z-order, transparency [0..1] per f...
... content arrives from network via nsistreamlistener::ondataavailable parser tokenizes & processes content; invokes methods on nsicontentsink with parser node objects some buffering and fixup occurs here opencontainer, closecontainer, addleaf content sink creates and attaches content nodes using nsicontent interface content sink maintains stack of “live” elements more buffering and fixup occurs here insertchildat, appendchildto, removechildat frame construction content sink uses nsidocument interface to notify of Δs in content model contentappended, contentinserted, contentremoved presshell is registered as document observer receives contentappended, etc.
Mozilla Content Localized in Your Language
Mozilla › Localization › L10n Style Guide › Mozilla Content Localized in Your Language
user interface elements titles should be brief and precise.
...user interface elements have limited space available for text.
Basics
Mozilla › MathML Project › Basics
msup> <mi>y</mi> <mn>4</mn> </msup> </mrow> <mo>+</mo> <msup> <mi>y</mi> <mn>5</mn> </msup> </mrow> </maction> </mtd> </mtr> </mtable> </mtd> </mtr> </mtable> </math> </div> css content .control { text-decoration: none; font-weight: bold; font-size: 200%; } input { color: red; } [class="inputmath"] { border: 1px dotted; } javascript content function setselection(id,value) { document.getelementbyid(id).setattribute("selection",value); } function expand() { setselection("a11","2"); setselection("a12","2"); setselection("a13","2"); setselection("a21","2"); setselection("a22","2"); setselection("a23","2"); setselection("a31","2"); setselection("a32","2"); setselection("a33","2"); setselection("a41","2"); setselection("a42","2"); setselection("a43","2"); } function unexpand(...
...) { setselection("a11","1"); setselection("a12","1"); setselection("a13","1"); setselection("a21","1"); setselection("a22","1"); setselection("a23","1"); setselection("a31","1"); setselection("a32","1"); setselection("a33","1"); setselection("a41","1"); setselection("a42","1"); setselection("a43","1"); } function incrementinput(inputid, increment) { var inputelement = document.getelementbyid(inputid); var size = parseint(inputelement.size) + increment; if (size <= 0) size = 1 inputelement.size = size; } and there could be more...
Extras
Mozilla › MathML Project › Extras
other renderers are expected to ignore attributes that they don't understand while the behavior of undefined elements is well, undefined.
...n</mi> <mo>!</mo> </mrow> </mfrac> </mrow> </math> </foreignobject> <text>exp(α)</text> </switch> </g> </g> </svg> </div> inline javascript html content <math display="block"> <mfrac> <mtext id="num">mouse</mtext> <mtext id="denum">over</mtext> </mfrac> </math> javascript content function whoistherealert(evt) { alert("who is there?"); } function attachlistener(id) { document.getelementbyid(id).addeventlistener("mouseover", whoistherealert); } function init() { attachlistener("num"); attachlistener("denum"); } window.addeventlistener("load", init); ...
Using the viewport meta tag to control layout on mobile browsers
Mozilla › Mobile › Viewport meta tag
(there are corresponding height and device-height values, which may be useful for pages with elements that change size or position based on the viewport height.) the initial-scale property controls the zoom level when the page is first loaded.
... working draft non-normatively describes the viewport meta element there is clearly demand for the viewport meta tag, since it is supported by most popular mobile browsers and used by thousands of web sites.
Mozilla Style System
Mozilla › Mozilla style system
the methods on nsistyleruleprocessor allow the front end to ask the back ends for the style data that applies to a given element or pseudo-element, in the form of style rules.
... computed style (front end) the interface that the front end exposes to the rest of mozilla consists of a single nsstyleset object and many nsstylecontext objects, each of which holds the computed style for an element, pseudo-element, or text node.
Power profiling overview
Mozilla › Performance › Power profiling overview
for example, it can be useful to gradually remove elements from a web page and see how the power-related measurements change.
... if the problem manifests on a particular website, try saving a local copy of the site and then manually removing html elements to see if a particular page feature is causing the problem many power problems are caused by either high cpu usage or high wakeup frequency.
ui.tooltipDelay
Mozilla › Preferences › Preference reference › ui.tooltipDelay
ui.tooltipdelay stores the delay in milliseconds between the mouse stopping over an element and the appearing of its tooltip.
... type:integer default value:500 exists by default: no application support: gecko 11.0 (firefox 11.0 / thunderbird 11.0 / seamonkey 2.8) status: active; last updated 2012-02-21 introduction: pushed to nightly on 2011-12-15 bugs: bug 204786 values integer (milliseconds, default: 500) the time for delay between the mouse stopping over the element and the tooltip appearing is stored in milliseconds and the default value is 500ms.
Preference reference
Mozilla › Preferences › Preference reference
accessibility.tabfocusthe preference accessibility.tabfocus controls what elements receive focus when the user presses the tab key.browser.altclicksavethe preference browser.altclicksave controls whether clicking a link while holding the alt key starts the download of that link.browser.dom.window.dump.enabledthis setting enables the dump function, which sends messages to the system console.
...ectbackgroundui.textselectbackground saves the color in which the background of a text selection in the user interface or in content will be styled.ui.textselectforegroundui.textselectforeground saves the color in which the text of a text selection in the user interface or the content will be styled.ui.tooltipdelayui.tooltipdelay stores the delay in milliseconds between the mouse stopping over an element and the appearing of its tooltip.view_source.syntax_highlightthe preference view_source.syntax_highlight controls whether markup in the view source view is syntax highlighted.
Preferences system
Mozilla › Preferences › Preferences system
the system is implemented through a few xul elements and attributes.
...ui elements that refer to the preferences above, e.g.: <checkbox id="check1" preference="pref1" label="&check1.label;" accesskey="&check1.accesskey;"/> </prefpane> <prefpane id="pane2" label="&pane2.title;" src="chrome://uri/to/pane.xul"/> </prefwindow> pane content can be specified inline or an external chrome uri supplied for pane content to be loaded in via a dynamic overlay.
PR_Calloc
Mozilla › Projects › NSPR › Reference › PR CALLOC
syntax #include <prmem.h> void *pr_calloc ( pruint32 nelem, pruint32 elsize); parameters nelem the number of elements of size elsize to be allocated.
... elsize the size of an individual element.
PR_Poll
Mozilla › Projects › NSPR › Reference › PR Poll
syntax #include <prio.h> print32 pr_poll( prpolldesc *pds, printn npds, printervaltime timeout); parameters the function has the following parameters: pds a pointer to the first element of an array of prpolldesc structures.
... npds the number of elements in the pds array.
Rhino overview
Mozilla › Projects › Rhino › Overview
array constructor array(i) for a number argument i constructs an array with a single element equal to i for version 1.2 only.
... otherwise the ecma conformant version is used (an array is constructed with no elements but with length property equal to i).
Performance Hints
Mozilla › Projects › Rhino › Performance
arrays use the forms of the array constructor that specify a size or take a list of initial elements.
...similarly, new array("a", "b", "c") or ["a", "b", "c"] will cause a 3-element array to be allocated to hold the contents of the javascript array.
Garbage collection
Mozilla › Projects › SpiderMonkey › Internals › Garbage collection
an arena is one page (4096 bytes on almost all platforms) and contains an arenaheader, a few pad bytes, and then an array of aligned elements.
... all elements in an arena have the same allocation kind and size.
JS_ClearNonGlobalObject
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS ClearNonGlobalObject
to remove a single array object element, use js_deleteelement.
... see also js_deleteproperty js_deleteelement bug 1043281 ...
JS_ClearScope
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS ClearScope
to remove a single array object element, use js_deleteelement.
... see also js_deleteproperty js_deleteelement js_clearnonglobalobject js_setallnonreservedslotstoundefined bug 749371 ...
JS_ConstructObject
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS ConstructObject
otherwise, the first argc elements of this array must be populated with valid jsval values.
... the caller does not need to ensure that the array elements are rooted.
JS_DumpNamedRoots
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS DumpNamedRoots
rp void * a pointer to the rooted variable, array element, or field.
...it points to a variable, array element, or field of type jsval, jsobject *, jsstring *, or jsdouble *.
JS_GetArrayLength
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS GetArrayLength
retrieve the number of elements in an array object.
...see also mxr id search for js_getarraylength js_getelement js_setarraylength ...
JS_LookupProperty
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS LookupProperty
*name, js::mutablehandlevalue vp); bool js_lookupucproperty(jscontext *cx, js::handleobject obj, const char16_t *name, size_t namelen, js::mutablehandlevalue vp); bool js_lookuppropertybyid(jscontext *cx, js::handleobject obj, js::handleid id, js::mutablehandlevalue vp); // added in spidermonkey 1.8.1 bool js_lookupelement(jscontext *cx, js::handleobject obj, uint32_t index, js::mutablehandlevalue vp); // ---- obsolete since spidermonkey 31 ---- bool js_lookuppropertywithflags(jscontext *cx, js::handleobject obj, const char *name, unsigned flags, js::mutablehandlevalue vp); bool js_lookuppropertywithflagsbyid(jscontext *cx, js::handleobject obj, js::handleid id, ...
...this will be either obj or an element on obj's prototype chain.
Web Replay
Mozilla › Projects › WebReplay
to prevent this from having an effect on iteration order (and execution behavior) in the table, the main table classes (for now plhashtable and pldhashtable) are instrumented so that they always iterate over elements in the order they were added when recording or replaying.
... media elements are not supported yet, as many of these run third party multithreaded code which hasn't been tested with the infrastructure.
Gecko events
Mozilla › Tech › Accessibility › AT-APIs › Gecko › Events
is supported: yes targets: table_cell - the cell of <xul:tree/>, any accessible for html element when @title or @alt attribute is changed.
...server applications send this event when a user needs to know that a user interface element has changed.
Feed content access API
Mozilla › Tech › Feed content access API
nsifeedelementbase a base class subclassed by several of the other feed-related interfaces.
...+ "</h1><p>"); var itemarray = feed.items; var numitems = itemarray.length; // write the article information if (!numitems) { doc.write("<i>no news is good news!</i>"); } else { var i; var theentry; var theurl; var info; for (i=0; i<numitems; i++) { theentry = itemarray.queryelementat(i, components.interfaces.nsifeedentry); if (theentry) { theurl = doc.write('<b><a href="' + theentry.link.resolve("") + '">' + theentry.title.text + '</a></b><br>'); if (theentry.summary) { info = theentry.summary.text + "<p><hr><p>"; } else { info = theentry.content.text + "<p><hr...
Places utilities for JavaScript
Mozilla › Tech › Places › Places utilities for JavaScript
return type return string serialized place uri getdescriptionfromdocument() get the description associated with a document, as specified in a <meta> element.
... getdescriptionfromdocument(doc) parameters doc a dom document to get a description for return type returns a description string if a meta element was discovered with a "description" or "httpequiv" attribute, empty string otherwise.
Components.classes
Mozilla › Tech › XPCOM › Language Bindings › Components.classes
if the given element in the components.classes object is not registered on the machine then trying to access it will generate a javascript warning in strict mode and the value returned will be the javascript value undefined.
... you should use the in operator to test for the element before trying to access it: if (!("@some/bogus/class;1" in components.classes)) // do something...
Components.results
Mozilla › Tech › XPCOM › Language Bindings › Components.results
elements in this array can be used to test against unknown nsresult variables or they can be 'thrown' to indicate failure...
... if(something_unexpected_happened) throw components.results.ns_error_unexpected; the elements of the components.results object can be enumerated using a for-in loop.
nsACString
Mozilla › Tech › XPCOM › Reference › Glue classes › nsACString
methods beginreading the beginreading function returns a const pointer to the first element of the string's internal buffer.
... endreading the endreading function returns a const char_type pointer to the element just beyond the last element of the string's internal buffer.
nsAString
Mozilla › Tech › XPCOM › Reference › Glue classes › nsAString
methods beginreading the beginreading function returns a const pointer to the first element of the string's internal buffer.
... endreading the endreading function returns a const char_type pointer to the element just beyond the last element of the string's internal buffer.
nsIAccessibleHyperLink
Mozilla › Tech › XPCOM › Reference › Interface › nsIAccessibleHyperLink
selected boolean determines whether the element currently has the focus, for example after returning from the destination page.
... return value true if the element currently has the focus.
nsIAccessibleTable
Mozilla › Tech › XPCOM › Reference › Interface › nsIAccessibleTable
for example, html:caption element of html:table element.
...for example, @summary attribute on html:table element.
nsIContentSecurityPolicy
Mozilla › Tech › XPCOM › Reference › Interface › nsIContentSecurityPolicy
shouldload() delegate method called by the service when sub-elements of the protected document are being loaded.
...short shouldload( in unsigned long acontenttype, in nsiuri acontentlocation, in nsiuri arequestorigin, in nsisupports acontext, in acstring amimetypeguess, in nsisupports aextra ); parameters acontenttype acontentlocation arequestorigin acontext amimetypeguess aextra return value shouldprocess() delegate method called by the service when sub-elements of the protected document are being processed.
nsIContentView
Mozilla › Tech › XPCOM › Reference › Interface › nsIContentView
note: currently, only <frame> and <iframe> elements are handled as content views.
... support for using this api for all scrollable elements is coming; see bug 618975 for details.
nsIDOMMozNetworkStatsManager
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMMozNetworkStatsManager
if true, return only browsing traffic, which is generated from the mozbrowser iframe element within an app.
... if false or not set, the total traffic, which is generated from both the mozapp and mozbrowser iframe elements, is returned.
nsIDOMSerializer
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMSerializer
ance, use: var domserializer = components.classes["@mozilla.org/xmlextras/xmlserializer;1"] .createinstance(components.interfaces.nsidomserializer); method overview void serializetostream(in nsidomnode root, in nsioutputstream stream, in autf8string charset); astring serializetostring(in nsidomnode root); methods serializetostream() the subtree rooted by the specified element is serialized to a byte stream using the character set specified.
... serializetostring() the subtree rooted by the specified element is serialized to a string.
nsIDirectoryEnumerator
Mozilla › Tech › XPCOM › Reference › Interface › nsIDirectoryEnumerator
the nextfile attribute is the first element upon the first call.
... this attribute is null if there is no next element.
nsIFeedPerson
Mozilla › Tech › XPCOM › Reference › Interface › nsIFeedPerson
1.0 66 introduced gecko 1.8 inherits from: nsifeedelementbase last changed in gecko 1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) attributes attribute type description email astring the person's email address.
... see also nsifeedelementbase interwiki link ...
nsIFile
Mozilla › Tech › XPCOM › Reference › Interface › nsIFile
edesc(in long flags, in long mode); void renameto(in nsifile newparentdir, in astring newname); void remove(in boolean recursive); void reveal(); void setrelativedescriptor(in nsifile fromfile, in acstring relativedesc); attributes attribute type description directoryentries nsisimpleenumerator returns an enumeration of the elements in a directory.
... each element in the enumeration is an nsifile.
nsILoginManagerStorage
Mozilla › Tech › XPCOM › Reference › Interface › nsILoginManagerStorage
void getallencryptedlogins( out unsigned long count, optional [retval, array, size_is(count)] out nsilogininfo logins ); parameters count optional the number of elements in the array.
...void searchlogins( out unsigned long count, in nsipropertybag matchdata, [retval, array, size_is(count)] out nsilogininfo logins ); parameters count the number of elements in the logins array.
nsIMessenger
Mozilla › Tech › XPCOM › Reference › Interface › nsIMessenger
if this window contains a messagepane element (i think this may mean a xul:browser element with its id set to "messagepane"?), then the nsidocshell will be used for future nsimessenger operations.
... if there is no messagepane element, then the root xul nsidocshell will be used (so that openurl() will still work).
nsIMsgSearchSession
Mozilla › Tech › XPCOM › Reference › Interface › nsIMsgSearchSession
boolean isstringattribute(in nsmsgsearchattribvalue attrib); void addallscopes(in nsmsgsearchscopevalue attrib); void search(in nsimsgwindow awindow); void interruptsearch(); void pausesearch(); void resumesearch(); [noscript] nsmsgsearchtype setsearchparam(in nsmsgsearchtype type, in voidptr param); [noscript] void addresultelement(in nsmsgresultelement element); boolean matchhdr(in nsimsgdbhdr amsghdr, in nsimsgdatabase adatabase); void addsearchhit(in nsimsgdbhdr header, in nsimsgfolder folder); attributes attribute type description searchterms nsisupportsarray readonly: numsearchterms unsigned long readonly: runningadapter nsimsgsearchad...
... void pausesearch(); resumesearch() void resumesearch(); setsearchparam() [noscript] nsmsgsearchtype setsearchparam(in nsmsgsearchtype type, in voidptr param); parameters type param addresultelement() [noscript] void addresultelement(in nsmsgresultelement element); parameters element matchhdr() boolean matchhdr(in nsimsgdbhdr amsghdr, in nsimsgdatabase adatabase); parameters amsghdr adatabase addsearchhit() void addsearchhit(in nsimsgdbhdr header, in nsimsgfolder folder); parameters header folder ...
nsISelectionPrivate
Mozilla › Tech › XPCOM › Reference › Interface › nsISelectionPrivate
gettableselectiontype() test if supplied range points to a single table element.
..."none" means a table element is not selected.
nsIStringEnumerator
Mozilla › Tech › XPCOM › Reference › Interface › nsIStringEnumerator
the "next" element is the first string upon the first call.
... must be preceded by a call to hasmoreelements() which returns pr_true.
nsITaskbarPreviewController
Mozilla › Tech › XPCOM › Reference › Interface › nsITaskbarPreviewController
note that this context is not actually attached to a canvas element.
...note that this context is not actually attached to a canvas element.
nsIWebBrowserPersist
Mozilla › Tech › XPCOM › Reference › Interface › nsIWebBrowserPersist
output the content of noscript elements.
...output the content of noframes elements.
nsIXSLTProcessor
Mozilla › Tech › XPCOM › Reference › Interface › nsIXSLTProcessor
this can be either a document node or an element node.
...if the argument is an element node it must be the xsl:stylesheet (or xsl:transform) element of an xslt stylesheet.
XPIDL
Mozilla › Tech › XPIDL
ns[c]string, refptr<t>, or uint32_t) string, wstring, [ptr] native and [ref] native are unsupported as element types.
...webidl types will be passed as mozilla::dom::interfacename* when used as in-parameters, as mozilla::dom::interfacename** when used as out or inout-parameters, and as refptr<mozilla::dom::interfacename> when used as an array element.
Activity Manager examples
Mozilla › Thunderbird › Thunderbird extensions › HowTos › Activity Manager
if activity developers would like to extend the default ui representation of the activity types, they can provide their own xbl elements for their own activity types.
... all custom activity xbl elements should inherit from "activity-base" binding.
Using popup notifications
Mozilla › Using popup notifications
the popupnotifications.jsm code module adds a popupid attribute to the notification object's icon element.
... components.utils.import('resource://gre/modules/popupnotifications.jsm'); var notify = new popupnotifications(gbrowser, document.getelementbyid("notification-popup"), document.getelementbyid("notification-popup-box")); var notification = notify.show( // browser gbrowser.selectedbrowser, // popup id "pdes-popup", // message "hi, there!, i'm gonna show you something today!!", // anchor id null, // main action { label: "click here", accesskey: "d", callback: function() { // you can call your fun...
Zombie compartments
Mozilla › Zombie compartments
oxes │ │ │ │ └──0.00 mb (00.00%) ── text-runs │ │ │ ├──3.78 mb (00.76%) ++ js-compartment(https://www.google.de/?gws_rd=ssl) │ │ │ ├──0.51 mb (00.10%) ── style-sheets │ │ │ ├──0.33 mb (00.07%) -- dom │ │ │ │ ├──0.17 mb (00.04%) ── text-nodes │ │ │ │ ├──0.13 mb (00.03%) ── element-nodes │ │ │ │ ├──0.02 mb (00.00%) ── other │ │ │ │ ├──0.01 mb (00.00%) ── orphan-nodes │ │ │ │ └──0.00 mb (00.00%) ── event-targets │ │ │ └──0.00 mb (00.00%) ── property-tables │ │ └───5.93 mb (01.19%) -- js-zone(0x13ffa0000) │ │ ├──1.92 mb (00.39%) ── unused-gc-things ...
... for example, for an add-on that remembers passwords, visit a site that requires a password; for an add-on that performs an operation involving a specific page element such as an image or a chunk of text, perform that operation.
CType
Mozilla › js-ctypes › js-ctypes reference › CType
methods available on all ctype objects array() returns a new ctype representing an array of elements of the type on which it was called.
... ctype array( [n] }; parameters n optional the number of elements in the declared array type.
Preferences System
Preferences System
the system is implemented through a few xul elements and attributes.
...ui elements that refer to the preferences above, e.g.: <checkbox id="check1" preference="pref1" label="&check1.label;" accesskey="&check1.accesskey;"/> </prefpane> <prefpane id="pane2" label="&pane2.title;" src="chrome://uri/to/pane.xul"/> </prefwindow> pane content can be specified inline or an external chrome uri supplied for pane content to be loaded in via a dynamic overlay.
DOM allocation example - Firefox Developer Tools
Tools › Memory › DOM allocation example
it just contains a script that creates a large number of dom nodes: var toolbarbuttoncount = 20; var toolbarcount = 200; function getrandomint(min, max) { return math.floor(math.random() * (max - min + 1)) + min; } function createtoolbarbutton() { var toolbarbutton = document.createelement("span"); toolbarbutton.classlist.add("toolbarbutton"); // stop spidermonkey from sharing instances toolbarbutton[getrandomint(0,5000)] = "foo"; return toolbarbutton; } function createtoolbar() { var toolbar = document.createelement("div"); // stop spidermonkey from sharing instances toolbar[getrandomint(0,5000)] = "foo"; for (var i = 0; i < toolbarbuttoncount; i++) { var tool...
...barbutton = createtoolbarbutton(); toolbar.appendchild(toolbarbutton); } return toolbar; } function createtoolbars() { var container = document.getelementbyid("container"); for (var i = 0; i < toolbarcount; i++) { var toolbar = createtoolbar(); container.appendchild(toolbar); } } createtoolbars(); a simple pseudocode representation of how this code operates looks like this: createtoolbars() -> createtoolbar() // called 200 times, creates 1 div element each time -> createtoolbarbutton() // called 20 times per toolbar, creates 1 span element each time in total, then, it creates 200 htmldivelement objects, and 4000 htmlspanelement objects.
Dominators view - Firefox Developer Tools
Tools › Memory › Dominators view
for example: variables allocated on the stack need to be rooted, or internal caches may need to root their​ elements.
... the window gc root holds a reference to an htmldivelement object, and that holds a reference to an object, and so on.
UI Tour - Firefox Developer Tools
Tools › Performance › UI Tour
it contains two elements: an overview of the waterfall and a frame rate graph.
... correlating events because these elements are synchronized, you can correlate events in one element with events in another.
Settings - Firefox Developer Tools
Tools › Settings
note that in firefox 52 we removed the checkbox to toggle the "select element" button.
... the "select element" button is now always shown.
Toolbox - Firefox Developer Tools
Tools › Tools Toolbox
this lets you select a page element for inspection.
... see "selecting elements".
Console messages - Firefox Developer Tools
Tools › Web Console › Console messages
synchronous and asynchronous reflows if a change is made that invalidates the current layout — for example, the browser window is resized or some javascript modifies an element's css — the layout is not recalculated immediately.
...for example, code like this will cause an immediate, synchronous, reflow, when it calls window.getcomputedstyle(thing).height: var thing = document.getelementbyid("the-thing"); thing.style.display = "inline-block"; var thingheight = window.getcomputedstyle(thing).height; because of this, it's a good idea to avoid interleaving write and read calls to an element's styles when manipulating the dom, because every time you read back a style that has been invalidated by a previous write call, you force a synchronous reflow.
Rich output - Firefox Developer Tools
Tools › Web Console › Rich output
in particular, it: provides extra information for certain types enables detailed examination of the object's properties provides richer information for dom elements, and enables you to select them in the inspector type-specific rich output the web console provides rich output for many object types, including the following: object array date promise regexp window document element event examining object properties when an object is logged to the console it has a right-pointing triangle next to it, indicating that it can be expanded.
...cription: "refactor styles", datecreated: 1552404493169 } ​ 2: object { status: "to do", description: "create feedback form", datecreated: 1552404512630 } ​ 3: object { status: "to do", description: "normalize table", datecreated: 1552404533790 } ​ length: 4 ​ <prototype>: array [] debugger eval code:1:9 undefined highlighting and inspecting dom nodes if you hover the mouse over any dom element in the console output, it's highlighted on the page: in the screenshot above you'll also see a blue "target" icon next to the node in the console output: click it to switch to the inspector with that node selected.
ANGLE_instanced_arrays.drawArraysInstancedANGLE() - Web APIs
Web › API › ANGLE instanced arrays › drawArraysInstancedANGLE
in addition, it can execute multiple instances of the range of elements.
... primcount a glsizei specifying the number of instances of the range of elements to execute.
Animation.commitStyles() - Web APIs
Web › API › Animation › commitStyles
the commitstyles() method of the web animations api's animation interface commits the end styling state of an animation to the element being animated, even after that animation has been removed.
... it will cause the end styling state to be written to the element being animated, in the form of properties inside a style attribute.
Animation.oncancel - Web APIs
Web › API › Animation › oncancel
the cancel event can be triggered manually with animation.cancel() when the animation enters the "idle" play state from another state, such as when the animation is removed from an element before it finishes playing creating a new animation that is initially idle does not trigger a cancel event on the new animation.
... examples if this animation is canceled, remove its element.
Animation.onremove - Web APIs
Web › API › Animation › onremove
.queryselector('div'); document.body.addeventlistener('mousemove', evt => { let anim = divelem.animate( { transform: `translate(${ evt.clientx}px, ${evt.clienty}px)` }, { duration: 500, fill: 'forwards' } ); anim.commitstyles(); //anim.persist() anim.onremove = function() { console.log('animation removed'); } console.log(anim.replacestate); }); here we have a <div> element, and an event listener that fires the event handler code whenever the mouse moves.
... the event handler sets up an animation that animates the <div> element to the position of the mouse pointer.
Animation.persist() - Web APIs
Web › API › Animation › persist
.queryselector('div'); document.body.addeventlistener('mousemove', evt => { let anim = divelem.animate( { transform: `translate(${ evt.clientx}px, ${evt.clienty}px)` }, { duration: 500, fill: 'forwards' } ); anim.commitstyles(); //anim.persist() anim.onremove = function() { console.log('animation removed'); } console.log(anim.replacestate); }); here we have a <div> element, and an event listener that fires the event handler code whenever the mouse moves.
... the event handler sets up an animation that animates the <div> element to the position of the mouse pointer.
Animation.replaceState - Web APIs
Web › API › Animation › replaceState
.queryselector('div'); document.body.addeventlistener('mousemove', evt => { let anim = divelem.animate( { transform: `translate(${ evt.clientx}px, ${evt.clienty}px)` }, { duration: 500, fill: 'forwards' } ); anim.commitstyles(); //anim.persist() anim.onremove = function() { console.log('animation removed'); } console.log(anim.replacestate); }); here we have a <div> element, and an event listener that fires the event handler code whenever the mouse moves.
... the event handler sets up an animation that animates the <div> element to the position of the mouse pointer.
Animation.startTime - Web APIs
Web › API › Animation › startTime
examples in the running on web animations api example, the we can sync all new animated cats by giving them all the same starttime as the original running cat: var catrunning = document.getelementbyid ("withwaapi").animate(keyframes, timing); /* a function that makes new cats.
... */ function addcat(){ var newcat = document.createelement("div"); newcat.classlist.add("cat"); return newcat; } /* this is the function that adds a cat to the waapi column */ function animatenewcatwithwaapi() { // make a new cat var newcat = addcat(); // animate said cat with the waapi's "animate" function var newanimationplayer = newcat.animate(keyframes, timing); // set the animation's start time to be the same as the original .cat#withwaapi newanimationplayer.starttime = catrunning.starttime; // add the cat to the pile.
AnimationEvent - Web APIs
Web › API › AnimationEvent
animationevent.pseudoelement read only is a domstring, starting with '::', containing the name of the pseudo-element the animation runs on.
... if the animation doesn't run on a pseudo-element but on the element, an empty string: ''.
AudioContext - Web APIs
Web › API › AudioContext
audiocontext.createmediaelementsource() creates a mediaelementaudiosourcenode associated with an htmlmediaelement.
... this can be used to play and manipulate audio from <video> or <audio> elements.
AudioParam.setValueAtTime() - Web APIs
Web › API › AudioParam › setValueAtTime
examples this simple example features a media element source with two control buttons (see our webaudio-examples repo for the source code, or view the example live).
...ew audiocontext(); // set basic variables for example var myaudio = document.queryselector('audio'); var pre = document.queryselector('pre'); var myscript = document.queryselector('script'); pre.innerhtml = myscript.innerhtml; var targetattimeplus = document.queryselector('.set-target-at-time-plus'); var targetattimeminus = document.queryselector('.set-target-at-time-minus'); // create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a gain node and set it's gain value to 0.5 var gainnode = audioctx.creategain(); gainnode.gain.value = 0.5; var currgain = gainnode.gain.value; // connect the audiobuffersourcenode to the gainnode // and the gainnode to the destination source.connect(gainnode); gainnode.connect...
AudioTrack.id - Web APIs
Web › API › AudioTrack › id
this id can be used with the audiotracklist.gettrackbyid() method to locate a specific track within the media associated with a media element.
... syntax var trackid = audiotrack.id; value a domstring which identifies the track, suitable for use when calling gettrackbyid() on an audiotracklist such as the one specified by a media element's audiotracks property.
AudioTrackList: change event - Web APIs
Web › API › AudioTrackList › change event
bubbles no cancelable no interface event event handler property onchange examples using addeventlistener(): const videoelement = document.queryselector('video'); videoelement.audiotracks.addeventlistener('change', (event) => { console.log(`'${event.type}' event fired`); }); // changing the value of `enabled` will trigger the `change` event const toggletrackbutton = document.queryselector('.toggle-track'); toggletrackbutton.addeventlistener('click', () => { const track = videoelement.audiotracks[0]; track.enabled = !track.enabled; }); using the onchange event handler property: const videoelement = document...
....queryselector('video'); videoelement.audiotracks.onchange = (event) => { console.log(`'${event.type}' event fired`); }; // changing the value of `enabled` will trigger the `change` event const toggletrackbutton = document.queryselector('.toggle-track'); toggletrackbutton.addeventlistener('click', () => { const track = videoelement.audiotracks[0]; track.enabled = !track.enabled; }); specifications specification status html living standardthe definition of 'change' in that specification.
AudioTrackList.onchange - Web APIs
Web › API › AudioTrackList › onchange
syntax audiotracklist.onchange = eventhandler; value set onchange to a function that should be called whenever tracks are enabled or disabled on the media element.
... var tracklist = document.queryselector("video").audiotracks; tracklist.onchange = function(event) { tracklist.foreach(function(track) { updatetrackenabledbutton(track.id, track.enabled); }); }; the updatetrackenabledbutton(), in this example, should be a function that finds a user interface control using the track's id (perhaps the app uses the track id as the control element's id) and the track's enabled flag to determine which state the control should be in now.
BiquadFilterNode.getFrequencyResponse() - Web APIs
Web › API › BiquadFilterNode › getFrequencyResponse
d, one containing the input frequencies, and two to receive the output magnitude and phase values: var myfrequencyarray = new float32array(5); myfrequencyarray[0] = 1000; myfrequencyarray[1] = 2000; myfrequencyarray[2] = 3000; myfrequencyarray[3] = 4000; myfrequencyarray[4] = 5000; var magresponseoutput = new float32array(5); var phaseresponseoutput = new float32array(5); next we create a <ul> element in our html to contain our results, and grab a reference to it in our javascript: <p>biquad filter frequency response for: </p> <ul class="freq-response-output"> </ul> var freqresponseoutput = document.queryselector('.freq-response-output'); finally, after creating our biquad filter, we use getfrequencyresponse() to generate the response data and put it in our arrays, then loop through each da...
... function calcfrequencyresponse() { biquadfilter.getfrequencyresponse(myfrequencyarray,magresponseoutput,phaseresponseoutput); for(i = 0; i <= myfrequencyarray.length-1;i++){ var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + myfrequencyarray[i] + 'hz</strong>: magnitude ' + magresponseoutput[i] + ', phase ' + phaseresponseoutput[i] + ' radians.'; freqresponseoutput.appendchild(listitem); } } calcfrequencyresponse(); specifications specification status comment web audio apithe definition of 'getfrequencyresponse()' in that specification.
Blob.size - Web APIs
Web › API › Blob › size
example this example uses an <input> element of type file to ask the user for a group of files, then iterates over those files outputting their names and lengths in bytes.
... // fileinput is a htmlinputelement: <input type="file" multiple id="myfileinput"> var fileinput = document.getelementbyid("myfileinput"); // files is a filelist object (simliar to nodelist) var files = fileinput.files; for (var i = 0; i < files.length; i++) { console.log(files[i].name + " has a size of " + files[i].size + " bytes"); } specifications specification status comment file apithe definition of 'blob.size' in that specification.
Blob - Web APIs
Web › API › Blob
having converted the data into an object url, it can be used in a number of ways, including as the value of the <img> element's src attribute (assuming the data contains an image, of course).
... function typedarraytourl(typedarray, mimetype) { return url.createobjecturl(new blob([typedarray.buffer], {type: mimetype})) } const bytes = new uint8array(59); for(let i = 0; i < 59; i++) { bytes[i] = 32 + i; } const url = typedarraytourl(bytes, 'text/plain'); const link = document.createelement('a'); link.href = url; link.innertext = 'open the array url'; document.body.appendchild(link); result click the link in the example to see the browser decode the object url.
Body.json() - Web APIs
Web › API › Body › json
const mylist = document.queryselector('ul'); const myrequest = new request('products.json'); fetch(myrequest) .then(response => response.json()) .then(data => { for (const product of data.products) { let listitem = document.createelement('li'); listitem.appendchild( document.createelement('strong') ).textcontent = product.name; listitem.append( ` can be found in ${ product.location }.
... cost: ` ); listitem.appendchild( document.createelement('strong') ).textcontent = `£${product.price}`; mylist.appendchild(listitem); } }) .catch(console.error); specifications specification status comment fetchthe definition of 'body.json()' in that specification.
Body.text() - Web APIs
Web › API › Body › text
example in our fetch text example (run fetch text live), we have an <article> element and three links (stored in the mylinks array.) first, we loop through all of these and give each one an onclick event handler so that the getdata() function is run — with the link's data-page identifier passed to it as an argument — when one of the links is clicked.
...when the fetch is successful, we read a usvstring (text) object out of the response using text(), then set the innerhtml of the <article> element equal to the text object.
CSSStyleDeclaration.cssText - Web APIs
Web › API › CSSStyleDeclaration › cssText
the csstext property of the cssstyledeclaration interface returns or sets the text of the element's inline style declaration only.
... example <span id="s1" style="color: red;"> some text </span> <script> var elem = document.getelementbyid("s1"); alert(elem.style.csstext); // "color: red;" </script> specifications specification status comment css object model (cssom)the definition of 'cssstyledeclaration: csstext' in that specification.
CSSStyleSheet.insertRule() - Web APIs
Web › API › CSSStyleSheet › insertRule
mystyle.insertrule('#blanc { color: white }', 0); function to add a stylesheet rule /** * add a stylesheet rule to the document (it may be better practice * to dynamically change classes, so style information can be kept in * genuine stylesheets and avoid adding extra elements to the dom).
...param {array} rules accepts an array of json-encoded declarations * @example addstylesheetrules([ ['h2', // also accepts a second argument as an array of arrays instead ['color', 'red'], ['background-color', 'green', true] // 'true' for !important rules ], ['.myclass', ['background-color', 'yellow'] ] ]); */ function addstylesheetrules (rules) { var styleel = document.createelement('style'); // append <style> element to <head> document.head.appendchild(styleel); // grab style element's sheet var stylesheet = styleel.sheet; for (var i = 0; i < rules.length; i++) { var j = 1, rule = rules[i], selector = rule[0], propstr = ''; // if the second argument of a rule is an array of arrays, correct our variables.
CSS Object Model (CSSOM) - Web APIs
Web › API › CSS Object Model
event caretposition css csscharsetrule cssconditionrule csscounterstylerule cssfontfacerule cssfontfeaturevaluesmap cssfontfeaturevaluesrule cssgroupingrule cssimportrule csskeyframerule csskeyframesrule cssmarginrule cssmediarule cssnamespacerule csspagerule cssrule cssrulelist cssstyledeclaration cssstylesheet cssstylerule csssupportsrule cssvariablesmap cssviewportrule elementcssinlinestyle fontface fontfaceset fontfacesetloadevent geometryutils getstyleutils linkstyle medialist mediaquerylist mediaquerylistevent mediaquerylistlistener screen stylesheet stylesheetlist transitionevent several other interfaces are also extended by the cssom-related specifications: document, window, element, htmlelement, htmlimageelement, range, mouseevent, and svgelement...
...positionvalue cssrotate cssscale cssskew cssskewx cssskewy cssstylevalue csstransformcomponent csstransformvalue csstranslate cssunitvalue cssunparsedvalue cssvariablereferencevalue stylepropertymap stylepropertymapreadonly obsolete cssom interfaces cssprimitivevalue cssvalue cssvaluelist tutorials determining the dimensions of elements (it needs some updating as it was made in the dhtml/ajax era).
CSS Typed Object Model API - Web APIs
Web › API › CSS Typed OM API
this not only simplifies css manipulation, but also lessens the negative impact on performance as compared to htmlelement.style.
... cssunparsedvalue.foreach() method executing a provided function once for each element of the cssunparsedvalue.
CanvasPattern.setTransform() - Web APIs
Web › API › CanvasPattern › setTransform
html <canvas id="canvas"></canvas> <svg id="svg1"></svg> javascript var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); var svg1 = document.getelementbyid('svg1'); var matrix = svg1.createsvgmatrix(); var img = new image(); img.src = 'https://mdn.mozillademos.org/files/222/canvas_createpattern.png'; img.onload = function() { var pattern = ctx.createpattern(img, 'repeat'); pattern.settransform(matrix.rotate(-45).scale(1.5)); ctx.fillstyle = pattern; ctx.f...
...div> <textarea id="code" class="playable-code" style="height:120px"> var img = new image(); img.src = 'https://mdn.mozillademos.org/files/222/canvas_createpattern.png'; img.onload = function() { var pattern = ctx.createpattern(img, 'repeat'); pattern.settransform(matrix.rotate(-45).scale(1.5)); ctx.fillstyle = pattern; ctx.fillrect(0, 0, 400, 400); };</textarea> var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); var textarea = document.getelementbyid('code'); var reset = document.getelementbyid('reset'); var edit = document.getelementbyid('edit'); var code = textarea.value; var svg1 = document.getelementbyid('svg1'); var matrix = svg1.createsvgmatrix(); function drawcanvas() { ctx.clearrect(0, 0, canvas.width, canvas.height); eval(textarea.value); }...
CanvasRenderingContext2D.bezierCurveTo() - Web APIs
Web › API › CanvasRenderingContext2D › bezierCurveTo
html <canvas id="canvas"></canvas> javascript // define canvas and context const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // define the points as {x, y} let start = { x: 50, y: 20 }; let cp1 = { x: 230, y: 30 }; let cp2 = { x: 150, y: 80 }; let end = { x: 250, y: 100 }; // cubic bézier curve ctx.beginpath(); ctx.moveto(start.x, start.y); ctx.beziercurveto(cp1.x, cp1.y, cp2.x, cp2.y, end.x, end.y); ctx.stroke(); // start and end points ctx.fill...
... const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.beginpath(); ctx.moveto(30, 30); ctx.beziercurveto(120,160, 180,10, 220,140); ctx.stroke(); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.beziercurveto' in that specification.
CanvasRenderingContext2D.clip() - Web APIs
Web › API › CanvasRenderingContext2D › clip
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // create circular clipping region ctx.beginpath(); ctx.arc(100, 75, 50, 0, math.pi * 2); ctx.clip(); // draw stuff that gets clipped ctx.fillstyle = 'blue'; ctx.fillrect(0, 0, canvas.width, canvas.height); ctx.fillstyle = 'orange'; ctx.fillrect(0, 0, 100, 100); result specifying a path and a fillrule this example saves two rectangles to...
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // create clipping path let region = new path2d(); region.rect(80, 10, 20, 130); region.rect(40, 50, 100, 50); ctx.clip(region, "evenodd"); // draw stuff that gets clipped ctx.fillstyle = 'blue'; ctx.fillrect(0, 0, canvas.width, canvas.height); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.clip' in that specification.
CanvasRenderingContext2D.closePath() - Web APIs
Web › API › CanvasRenderingContext2D › closePath
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.beginpath(); ctx.moveto(20, 140); // move pen to bottom-left corner ctx.lineto(120, 10); // line to top corner ctx.lineto(220, 140); // line to bottom-right corner ctx.closepath(); // line to bottom-left corner ctx.stroke(); result closing just one sub-path this example draws a smiley face consisting of three disconnected s...
... const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.beginpath(); ctx.arc(240, 20, 40, 0, math.pi); ctx.moveto(100, 20); ctx.arc(60, 20, 40, 0, math.pi); ctx.moveto(215, 80); ctx.arc(150, 80, 65, 0, math.pi); ctx.closepath(); ctx.linewidth = 6; ctx.stroke(); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.closepath' in that specification.
CanvasRenderingContext2D.createImageData() - Web APIs
Web › API › CanvasRenderingContext2D › createImageData
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const imagedata = ctx.createimagedata(100, 50); console.log(imagedata); // imagedata { width: 100, height: 50, data: uint8clampedarray[20000] } filling a blank imagedata object this example creates and fills a new imagedata object with purple pixels.
... const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const imagedata = ctx.createimagedata(100, 100); // iterate through every pixel for (let i = 0; i < imagedata.data.length; i += 4) { // modify pixel data imagedata.data[i + 0] = 190; // r value imagedata.data[i + 1] = 0; // g value imagedata.data[i + 2] = 210; // b value imagedata.data[i + 3] = 255; // a value } // draw image data to the canvas ctx.putimagedata(imagedata, 20, 20); result more examples for more examples using createimagedata() and...
CanvasRenderingContext2D.direction - Web APIs
Web › API › CanvasRenderingContext2D › direction
"inherit" the text direction is inherited from the <canvas> element or the document as appropriate.
... html <canvas id="canvas"></canvas> javascript var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); ctx.font = '48px serif'; ctx.filltext('hi!', 150, 50); ctx.direction = 'rtl'; ctx.filltext('hi!', 150, 130); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.direction' in that specification.
CanvasRenderingContext2D.ellipse() - Web APIs
Web › API › CanvasRenderingContext2D › ellipse
html <canvas id="canvas" width="200" height="200"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // draw the ellipse ctx.beginpath(); ctx.ellipse(100, 100, 50, 75, math.pi / 4, 0, 2 * math.pi); ctx.stroke(); // draw the ellipse's line of reflection ctx.beginpath(); ctx.setlinedash([5, 5]); ctx.moveto(0, 200); ctx.lineto(200, 0); ctx.stroke(); result various elliptical arcs this example creates three elliptical paths with varying pro...
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.fillstyle = 'red'; ctx.beginpath(); ctx.ellipse(60, 75, 50, 30, math.pi * .25, 0, math.pi * 1.5); ctx.fill(); ctx.fillstyle = 'blue'; ctx.beginpath(); ctx.ellipse(150, 75, 50, 30, math.pi * .25, 0, math.pi); ctx.fill(); ctx.fillstyle = 'green'; ctx.beginpath(); ctx.ellipse(240, 75, 50, 30, math.pi * .25, 0, math.pi, true); ctx.fill(); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.ellipse' in that specification.
CanvasRenderingContext2D.fill() - Web APIs
Web › API › CanvasRenderingContext2D › fill
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.rect(10, 10, 150, 100); ctx.fill(); result specifying a path and a fillrule this example saves some intersecting lines to a path2d object.
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // create path let region = new path2d(); region.moveto(30, 90); region.lineto(110, 20); region.lineto(240, 130); region.lineto(60, 130); region.lineto(190, 20); region.lineto(270, 90); region.closepath(); // fill path ctx.fillstyle = 'green'; ctx.fill(region, 'evenodd'); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.fill' in that specification.
CanvasRenderingContext2D.fillStyle - Web APIs
Web › API › CanvasRenderingContext2D › fillStyle
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.fillstyle = 'blue'; ctx.fillrect(10, 10, 100, 100); result creating multiple fill colors using loops in this example, we use two for loops to draw a grid of rectangles, each having a different fill color.
... <canvas id="canvas" width="150" height="150"></canvas> const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); for (let i = 0; i < 6; i++) { for (let j = 0; j < 6; j++) { ctx.fillstyle = `rgb( ${math.floor(255 - 42.5 * i)}, ${math.floor(255 - 42.5 * j)}, 0)`; ctx.fillrect(j * 25, i * 25, 25, 25); } } the result looks like this: screenshotlive sample specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.
CanvasRenderingContext2D.fillText() - Web APIs
Web › API › CanvasRenderingContext2D › fillText
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.font = '50px serif'; ctx.filltext('hello world', 50, 90); this code obtains a reference to the <canvas>, then gets a reference to its 2d graphics context.
... html <canvas id="canvas" width="400" height="150"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.font = '50px serif'; ctx.filltext('hello world', 50, 90, 140); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.filltext' in that specification.
CanvasRenderingContext2D.getLineDash() - Web APIs
Web › API › CanvasRenderingContext2D › getLineDash
if the number, when setting the elements, is odd, the elements of the array get copied and concatenated.
... const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.setlinedash([10, 20]); console.log(ctx.getlinedash()); // [10, 20] // draw a dashed line ctx.beginpath(); ctx.moveto(0, 50); ctx.lineto(300, 50); ctx.stroke(); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.getlinedash' in that specification.
CanvasRenderingContext2D.globalAlpha - Web APIs
Web › API › CanvasRenderingContext2D › globalAlpha
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.globalalpha = 0.5; ctx.fillstyle = 'blue'; ctx.fillrect(10, 10, 100, 100); ctx.fillstyle = 'red'; ctx.fillrect(50, 50, 100, 100); result overlaying transparent shapes this example illustrates the effect of overlaying multiple transparent shapes on top of each other.
... <canvas id="canvas" width="150" height="150"></canvas> const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // draw background ctx.fillstyle = '#fd0'; ctx.fillrect(0, 0, 75, 75); ctx.fillstyle = '#6c0'; ctx.fillrect(75, 0, 75, 75); ctx.fillstyle = '#09f'; ctx.fillrect(0, 75, 75, 75); ctx.fillstyle = '#f30'; ctx.fillrect(75, 75, 75, 75); ctx.fillstyle = '#fff'; // set transparency value ctx.globalalpha = 0.2; // draw transparent circles for (let i =...
CanvasRenderingContext2D.isPointInPath() - Web APIs
Web › API › CanvasRenderingContext2D › isPointInPath
html <canvas id="canvas"></canvas> <p>in path: <code id="result">false</code></p> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const result = document.getelementbyid('result'); ctx.rect(10, 10, 100, 100); ctx.fill(); result.innertext = ctx.ispointinpath(30, 70); result checking a point in the specified path whenever you move the mouse, this example checks whether the cursor is in a circular path2d path.
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // create circle const circle = new path2d(); circle.arc(150, 75, 50, 0, 2 * math.pi); ctx.fillstyle = 'red'; ctx.fill(circle); // listen for mouse moves canvas.addeventlistener('mousemove', function(event) { // check whether point is inside circle if (ctx.ispointinpath(circle, event.offsetx, event.offsety)) { ctx.fillstyle = 'green'; } else { ctx.fillstyle = 'red'; } // draw circle ctx.clearrect(0, 0, canvas.width, canvas.height); ctx.fill(circle); }); result specifications specification status comment html living standardthe definition of 'canvasre...
CanvasRenderingContext2D.isPointInStroke() - Web APIs
Web › API › CanvasRenderingContext2D › isPointInStroke
html <canvas id="canvas"></canvas> <p>in stroke: <code id="result">false</code></p> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const result = document.getelementbyid('result'); ctx.rect(10, 10, 100, 100); ctx.stroke(); result.innertext = ctx.ispointinstroke(50, 10); result checking a point in the specified path whenever you move the mouse, this example checks whether the cursor is in the stroke of an elliptical path2d path.
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // create ellipse const ellipse = new path2d(); ellipse.ellipse(150, 75, 40, 60, math.pi * .25, 0, 2 * math.pi); ctx.linewidth = 25; ctx.strokestyle = 'red'; ctx.fill(ellipse); ctx.stroke(ellipse); // listen for mouse moves canvas.addeventlistener('mousemove', function(event) { // check whether point is inside ellipse's stroke if (ctx.ispointinstroke(ellipse, event.offsetx, event.offsety)) { ctx.strokestyle = 'green'; } else { ctx.strokestyle = 'red'; } // draw ellipse ctx.clearrect(0, 0, canvas.width, canvas.height); ctx.fill(ellipse); ctx.stroke(ellipse); }); resu...
CanvasRenderingContext2D.lineCap - Web APIs
Web › API › CanvasRenderingContext2D › lineCap
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.beginpath(); ctx.moveto(20, 20); ctx.linewidth = 15; ctx.linecap = 'round'; ctx.lineto(100, 100); ctx.stroke(); result comparison of line caps in this example three lines are drawn, each with a different value for the linecap property.
... <canvas id="canvas" width="150" height="150"></canvas> const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const linecap = ['butt', 'round', 'square']; // draw guides ctx.strokestyle = '#09f'; ctx.beginpath(); ctx.moveto(10, 10); ctx.lineto(140, 10); ctx.moveto(10, 140); ctx.lineto(140, 140); ctx.stroke(); // draw lines ctx.strokestyle = 'black'; for (let i = 0; i < linecap.length; i++) { ctx.linewidth = 15; ctx.linecap = linecap[i]; ctx.begi...
CanvasRenderingContext2D.lineDashOffset - Web APIs
Web › API › CanvasRenderingContext2D › lineDashOffset
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.setlinedash([4, 16]); // dashed line with no offset ctx.beginpath(); ctx.moveto(0, 50); ctx.lineto(300, 50); ctx.stroke(); // dashed line with offset of 4 ctx.beginpath(); ctx.strokestyle = 'red'; ctx.linedashoffset = 4; ctx.moveto(0, 100); ctx.lineto(300, 100); ctx.stroke(); result the line with a dash offset is drawn in red.
... html <canvas id="canvas"></canvas> const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); let offset = 0; function draw() { ctx.clearrect(0, 0, canvas.width, canvas.height); ctx.setlinedash([4, 2]); ctx.linedashoffset = -offset; ctx.strokerect(10, 10, 100, 100); } function march() { offset++; if (offset > 16) { offset = 0; } draw(); settimeout(march, 20); } march(); specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.lin...
CanvasRenderingContext2D.lineJoin - Web APIs
Web › API › CanvasRenderingContext2D › lineJoin
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.linewidth = 20; ctx.linejoin = 'round'; ctx.beginpath(); ctx.moveto(20, 20); ctx.lineto(190, 100); ctx.lineto(280, 20); ctx.lineto(280, 150); ctx.stroke(); result comparison of line joins the example below draws three different paths, demonstrating each of the three linejoin options.
... <canvas id="canvas" width="150" height="150"></canvas> var ctx = document.getelementbyid('canvas').getcontext('2d'); var linejoin = ['round', 'bevel', 'miter']; ctx.linewidth = 10; for (let i = 0; i < linejoin.length; i++) { ctx.linejoin = linejoin[i]; ctx.beginpath(); ctx.moveto(-5, 5 + i * 40); ctx.lineto(35, 45 + i * 40); ctx.lineto(75, 5 + i * 40); ctx.lineto(115, 45 + i * 40); ctx.lineto(155, 5 + i * 40); ctx.stroke(); } screenshotlive sample specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.linejoin' in that specification.
CanvasRenderingContext2D.lineTo() - Web APIs
Web › API › CanvasRenderingContext2D › lineTo
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.beginpath(); // start a new path ctx.moveto(30, 50); // move the pen to (30, 50) ctx.lineto(150, 100); // draw a line to (150, 100) ctx.stroke(); // render the path result drawing connected lines each call of lineto() (and similar methods) automatically adds to the current sub-path, which means that all the lines wil...
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.moveto(90, 130); ctx.lineto(95, 25); ctx.lineto(150, 80); ctx.lineto(205, 25); ctx.lineto(210, 130); ctx.linewidth = 15; ctx.stroke(); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.lineto' in that specification.
CanvasRenderingContext2D.measureText() - Web APIs
Web › API › CanvasRenderingContext2D › measureText
example given this <canvas> element: <canvas id="canvas"></canvas> ...
... you can get a textmetrics object using the following code: const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); let text = ctx.measuretext('hello world'); console.log(text.width); // 56; specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.measuretext' in that specification.
CanvasRenderingContext2D.putImageData() - Web APIs
Web › API › CanvasRenderingContext2D › putImageData
html <canvas id="canvas"></canvas> javascript var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); function putimagedata(ctx, imagedata, dx, dy, dirtyx, dirtyy, dirtywidth, dirtyheight) { var data = imagedata.data; var height = imagedata.height; var width = imagedata.width; dirtyx = dirtyx || 0; dirtyy = dirtyy || 0; dirtywidth = dirtywidth !== undefined?
... javascript const canvas = document.createelement("canvas"); canvas.width = 1; canvas.height = 1; const context = canvas.getcontext("2d"); const imgdata = context.getimagedata(0, 0, canvas.width, canvas.height); const pixels = imgdata.data; pixels[0 + 0] = 1; pixels[0 + 1] = 127; pixels[0 + 2] = 255; pixels[0 + 3] = 1; console.log("before:", pixels); context.putimagedata(imgdata, 0, 0); const imgdata2 = context.getimagedata(0, 0, canvas.width, c...
CanvasRenderingContext2D.quadraticCurveTo() - Web APIs
Web › API › CanvasRenderingContext2D › quadraticCurveTo
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // quadratic bézier curve ctx.beginpath(); ctx.moveto(50, 20); ctx.quadraticcurveto(230, 30, 50, 100); ctx.stroke(); // start and end points ctx.fillstyle = 'blue'; ctx.beginpath(); ctx.arc(50, 20, 5, 0, 2 * math.pi); // start point ctx.arc(50, 100, 5, 0, 2 * math.pi); // end point ctx.fill(); // control point ctx.fillstyle = 'red'; ctx.b...
... const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.beginpath(); ctx.moveto(20, 110); ctx.quadraticcurveto(230, 150, 250, 20); ctx.stroke(); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.quadraticcurveto' in that specification.
CanvasRenderingContext2D.resetTransform() - Web APIs
Web › API › CanvasRenderingContext2D › resetTransform
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // draw a rotated rectangle ctx.rotate(45 * math.pi / 180); ctx.fillrect(60, 0, 100, 30); // reset transformation matrix to the identity matrix ctx.resettransform(); result continuing with a regular matrix whenever you're done drawing transformed shapes, you should call resettransform() before rendering anything else.
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // skewed rectangles ctx.transform(1, 0, 1.7, 1, 0, 0); ctx.fillstyle = 'gray'; ctx.fillrect(40, 40, 50, 20); ctx.fillrect(40, 90, 50, 20); // non-skewed rectangles ctx.resettransform(); ctx.fillstyle = 'red'; ctx.fillrect(40, 40, 50, 20); ctx.fillrect(40, 90, 50, 20); result the skewed rectangles are gray, and the non-skewed rectangles are red.
CanvasRenderingContext2D.rotate() - Web APIs
Web › API › CanvasRenderingContext2D › rotate
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // point of transform origin ctx.arc(0, 0, 5, 0, 2 * math.pi); ctx.fillstyle = 'blue'; ctx.fill(); // non-rotated rectangle ctx.fillstyle = 'gray'; ctx.fillrect(100, 0, 80, 20); // rotated rectangle ctx.rotate(45 * math.pi / 180); ctx.fillstyle = 'red'; ctx.fillrect(100, 0, 80, 20); // reset transformation matrix to the identity matrix ctx.s...
... const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // non-rotated rectangle ctx.fillstyle = 'gray'; ctx.fillrect(80, 60, 140, 30); // matrix transformation ctx.translate(150, 75); ctx.rotate(math.pi / 2); ctx.translate(-150, -75); // rotated rectangle ctx.fillstyle = 'red'; ctx.fillrect(80, 60, 140, 30); result the non-rotated rectangle is gray, and the rotated rectangle is red.
CanvasRenderingContext2D.scale() - Web APIs
Web › API › CanvasRenderingContext2D › scale
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // scaled rectangle ctx.scale(9, 3); ctx.fillstyle = 'red'; ctx.fillrect(10, 10, 8, 20); // reset current transformation matrix to the identity matrix ctx.settransform(1, 0, 0, 1, 0, 0); // non-scaled rectangle ctx.fillstyle = 'gray'; ctx.fillrect(10, 10, 8, 20); result the scaled rectangle is red, and the non-scaled rectangle is gray.
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.scale(-1, 1); ctx.font = '48px serif'; ctx.filltext('hello world!', -280, 90); ctx.settransform(1, 0, 0, 1, 0, 0); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.scale' in that specification.
CanvasRenderingContext2D.shadowColor - Web APIs
Web › API › CanvasRenderingContext2D › shadowColor
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // shadow ctx.shadowcolor = 'red'; ctx.shadowoffsetx = 10; ctx.shadowoffsety = 10; // filled rectangle ctx.fillrect(20, 20, 100, 100); // stroked rectangle ctx.linewidth = 6; ctx.strokerect(170, 20, 100, 100); result shadows on translucent shapes a shadow's opacity is affected by the transparency level of its parent object (even when sh...
... const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // shadow ctx.shadowcolor = 'rgba(255, 0, 0, .8)'; ctx.shadowblur = 8; ctx.shadowoffsetx = 30; ctx.shadowoffsety = 20; // filled rectangle ctx.fillstyle = 'rgba(0, 255, 0, .2)'; ctx.fillrect(10, 10, 150, 100); // stroked rectangle ctx.linewidth = 10; ctx.strokestyle = 'rgba(0, 0, 255, .6)'; ctx.strokerect(10, 10, 150, 100); result specifications specification status comment html living standardthe defi...
CanvasRenderingContext2D.strokeRect() - Web APIs
Web › API › CanvasRenderingContext2D › strokeRect
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.strokestyle = 'green'; ctx.strokerect(20, 10, 160, 100); result applying various context settings this example draws a rectangle with a drop shadow and thick, beveled outlines.
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.shadowcolor = '#d53'; ctx.shadowblur = 20; ctx.linejoin = 'bevel'; ctx.linewidth = 15; ctx.strokestyle = '#38f'; ctx.strokerect(30, 30, 160, 90); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.strokerect' in that specification.
CanvasRenderingContext2D.strokeStyle - Web APIs
Web › API › CanvasRenderingContext2D › strokeStyle
html <canvas id="canvas"></canvas> javascript var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); ctx.strokestyle = 'blue'; ctx.strokerect(10, 10, 100, 100); result creating multiple stroke colors using loops in this example, we use two for loops and the arc() method to draw a grid of circles, each having a different stroke color.
...(the red channel has a fixed value.) <canvas id="canvas" width="150" height="150"></canvas> var ctx = document.getelementbyid('canvas').getcontext('2d'); for (let i = 0; i < 6; i++) { for (let j = 0; j < 6; j++) { ctx.strokestyle = `rgb( 0, ${math.floor(255 - 42.5 * i)}, ${math.floor(255 - 42.5 * j)})`; ctx.beginpath(); ctx.arc(12.5 + j * 25, 12.5 + i * 25, 10, 0, math.pi * 2, true); ctx.stroke(); } } the result looks like this: screenshotlive sample specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.strokestyle' in that spe...
CanvasRenderingContext2D.strokeText() - Web APIs
Web › API › CanvasRenderingContext2D › strokeText
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.font = '50px serif'; ctx.stroketext('hello world', 50, 90); this code obtains a reference to the <canvas>, then gets a reference to its 2d graphics context.
... html <canvas id="canvas" width="400" height="150"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.font = '50px serif'; ctx.stroketext('hello world', 50, 90, 140); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.stroketext' in that specification.
CanvasRenderingContext2D.textAlign - Web APIs
Web › API › CanvasRenderingContext2D › textAlign
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); canvas.width = 350; const ctx = canvas.getcontext('2d'); const x = canvas.width / 2; ctx.beginpath(); ctx.moveto(x, 0); ctx.lineto(x, canvas.height); ctx.stroke(); ctx.font = '30px serif'; ctx.textalign = 'left'; ctx.filltext('left-aligned', x, 40); ctx.textalign = 'center'; ctx.filltext('center-aligned', x, 85); ctx.textalign = 'right'; ctx.filltext('right-aligned', x, 130); ...
... html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.font = '30px serif'; ctx.direction = 'ltr'; ctx.textalign = 'start'; ctx.filltext('start-aligned', 0, 50); ctx.textalign = 'end'; ctx.filltext('end-aligned', canvas.width, 120); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.textalign' in that specification.
Compositing and clipping - Web APIs
Web › API › Canvas API › Tutorial › Compositing
by default the <canvas> element has a clipping path that's the exact same size as the canvas itself.
... function draw() { var ctx = document.getelementbyid('canvas').getcontext('2d'); ctx.fillrect(0, 0, 150, 150); ctx.translate(75, 75); // create a circular clipping path ctx.beginpath(); ctx.arc(0, 0, 60, 0, math.pi * 2, true); ctx.clip(); // draw background var lingrad = ctx.createlineargradient(0, -75, 0, 75); lingrad.addcolorstop(0, '#232256'); lingrad.addcolorstop(1, '#143778'); ctx.fillstyle = lingrad; ctx.fillrect(-75, -75, 150, 150); // draw stars for (var j = 1; j < 50; j++) { ctx.save(); ctx.fillstyle = '#fff'; ctx.translate(75 - math.floor(math.random() * 150), ...
Using channel messaging - Web APIs
Web › API › Channel Messaging API › Using channel messaging
var input = document.getelementbyid('message-input'); var output = document.getelementbyid('message-output'); var button = document.queryselector('button'); var iframe = document.queryselector('iframe'); var channel = new messagechannel(); var port1 = channel.port1; // wait for the iframe to load iframe.addeventlistener("load", onload); function onload() { // listen for button clicks button.addeventlistener('click', oncl...
...in the iframe, we have the following javascript: var list = document.queryselector('ul'); var port2; // listen for the initial port transfer message window.addeventlistener('message', initport); // setup the transferred port function initport(e) { port2 = e.ports[0]; port2.onmessage = onmessage; } // handle messages received on port2 function onmessage(e) { var listitem = document.createelement('li'); listitem.textcontent = e.data; list.appendchild(listitem); port2.postmessage('message received by iframe: "' + e.data + '"'); } when the initial message is received from the main page via the window.postmessage method, we run the initport function.
CharacterData - Web APIs
Web › API › CharacterData
nondocumenttypechildnode.nextelementsibling read only returns the element immediately following the specified one in its parent's children list, or null if the specified element is the last one in the list.
... nondocumenttypechildnode.previouselementsibling read only returns the element immediately prior to the specified one in its parent's children list, or null if the specified element is the first one in the list.
ChildNode.remove() - Web APIs
Web › API › ChildNode › remove
syntax node.remove(); example using remove() <div id="div-01">here is div-01</div> <div id="div-02">here is div-02</div> <div id="div-03">here is div-03</div> var el = document.getelementbyid('div-02'); el.remove(); // removes the div with the 'div-02' id childnode.remove() is unscopable the remove() method is not scoped into the with statement.
...thub.com/jserz/js_piece/blob/master/dom/childnode/remove()/remove().md (function (arr) { arr.foreach(function (item) { if (item.hasownproperty('remove')) { return; } object.defineproperty(item, 'remove', { configurable: true, enumerable: true, writable: true, value: function remove() { this.parentnode.removechild(this); } }); }); })([element.prototype, characterdata.prototype, documenttype.prototype]); specifications specification status comment domthe definition of 'childnode.remove' in that specification.
ChildNode.replaceWith() - Web APIs
Web › API › ChildNode › replaceWith
examples using replacewith() var parent = document.createelement("div"); var child = document.createelement("p"); parent.appendchild(child); var span = document.createelement("span"); child.replacewith(span); console.log(parent.outerhtml); // "<div><span></span></div>" childnode.replacewith() is unscopable the replacewith() method is not scoped into the with statement.
...de); } else if (currentnode.parentnode){ currentnode.parentnode.removechild(currentnode); } // the value of "i" below is after the decrement if (!i) // if currentnode is the first argument (currentnode === arguments[0]) parent.replacechild(currentnode, this); else // if currentnode isn't the first parent.insertbefore(currentnode, this.nextsibling); } } if (!element.prototype.replacewith) element.prototype.replacewith = replacewithpolyfill; if (!characterdata.prototype.replacewith) characterdata.prototype.replacewith = replacewithpolyfill; if (!documenttype.prototype.replacewith) documenttype.prototype.replacewith = replacewithpolyfill; specification specification status comment domthe definition of 'childnode.replacewit...
Clipboard.readText() - Web APIs
Web › API › Clipboard › readText
example this example retrieves the textual contents of the clipboard and inserts the returned text into an element's contents.
... navigator.clipboard.readtext().then( cliptext => document.getelementbyid("outbox").innertext = cliptext); specifications specification status comment clipboard api and eventsthe definition of 'readtext()' in that specification.
Console.dirxml() - Web APIs
Web › API › Console › dirxml
displays an interactive tree of the descendant elements of the specified xml/html element.
... if it is not possible to display as an element the javascript object view is shown instead.
console.log() - Web APIs
Web › API › Console › log
another useful difference in chrome exists when sending dom elements to the console.
... notice: console.log prints the element in an html-like tree console.dir prints the element in a json-like tree specifically, console.log gives special treatment to dom elements, whereas console.dir does not.
console - Web APIs
Web › API › Console
console.dirxml() displays an xml/html element representation of the specified object if possible or the javascript object view if it is not possible.
... border and its longhand equivalents border-radius box-decoration-break box-shadow clear and float color cursor display font and its longhand equivalents line-height margin outline and its longhand equivalents padding text-* properties such as text-transform white-space word-spacing and word-break writing-mode note: the console message behaves like an inline element by default.
ContentIndex.getAll() - Web APIs
Web › API › ContentIndex › getAll
async function createreadinglist() { // access our service worker registration const registration = await navigator.serviceworker.ready; // get our index entries const entries = await registration.index.getall(); // create a containing element const readinglistelem = document.createelement('div'); // test for entries if (!array.length) { // if there are no entries, display a message const message = document.createelement('p'); message.innertext = 'you currently have no articles saved for offline reading.' readinglistelem.append(message); } else { // if entries are present, display in a list of links to ...
...the content const listelem = document.createelement('ul'); for (const entry of entries) { const listitem = document.createelement('li'); const anchorelem = document.createelement('a'); anchorelem.innertext = entry.title; anchorelem.setattribute('href', entry.url); listelem.append(listitem); } readinglistelem.append(listelem); } } specifications specification status comment unknownthe definition of 'getall' in that specification.
ContentIndex - Web APIs
Web › API › ContentIndex
async function createreadinglist() { // access our service worker registration const registration = await navigator.serviceworker.ready; // get our index entries const entries = await registration.index.getall(); // create a containing element const readinglistelem = document.createelement('div'); // test for entries if (!array.length) { // if there are no entries, display a message const message = document.createelement('p'); message.innertext = 'you currently have no articles saved for offline reading.' readinglistelem.append(message); } else { // if entries are present, display in a list of links to ...
...the content const listelem = document.createelement('ul'); for (const entry of entries) { const listitem = document.createelement('li'); const anchorelem = document.createelement('a'); anchorelem.innertext = entry.title; anchorelem.setattribute('href', entry.url); listelem.append(listitem); } readinglistelem.append(listelem); } } unregistering indexed content below is an asynchronous function, that removes an item from the content index.
Content Index API - Web APIs
Web › API › Content Index API
async function createreadinglist() { // access our service worker registration const registration = await navigator.serviceworker.ready; // get our index entries const entries = await registration.index.getall(); // create a containing element const readinglistelem = document.createelement('div'); // test for entries if (!array.length) { // if there are no entries, display a message const message = document.createelement('p'); message.innertext = 'you currently have no articles saved for offline reading.' readinglistelem.append(message); } else { // if entries are present, display in a list of links to ...
...the content const listelem = document.createelement('ul'); for (const entry of entries) { const listitem = document.createelement('li'); const anchorelem = document.createelement('a'); anchorelem.innertext = entry.title; anchorelem.setattribute('href', entry.url); listelem.append(listitem); } readinglistelem.append(listelem); } } unregistering indexed content below is an asynchronous function, that removes an item from the content index.
CredentialsContainer.create() - Web APIs
Web › API › CredentialsContainer › create
calls to it within an <iframe> element will resolve without effect.
...the options are: password: optional either an htmlformelement, or a passwordcredentialdata object.
CustomEvent - Web APIs
Web › API › CustomEvent
event.srcelement a non-standard alias (from old versions of microsoft internet explorer) for event.target.
...this includes listeners attached to the same element as well as those attached to elements that will be traversed later (during the capture phase, for instance).
DOMImplementation.createDocument() - Web APIs
Web › API › DOMImplementation › createDocument
qualifiednamestr is a domstring containing the qualified name, that is an optional prefix and colon plus the local root element name, of the document to be created.
... example var doc = document.implementation.createdocument ('http://www.w3.org/1999/xhtml', 'html', null); var body = document.createelementns('http://www.w3.org/1999/xhtml', 'body'); body.setattribute('id', 'abc'); doc.documentelement.appendchild(body); alert(doc.getelementbyid('abc')); // [object htmlbodyelement] specifications specification status comment domthe definition of 'domimplementation.createdocument' in that specification.
DOMParser - Web APIs
Web › API › DOMParser
in the case of an html document, you can also replace portions of the dom with new dom trees built from html by setting the value of the element.innerhtml and outerhtml properties.
... null on unsupported types if ((new domparser()).parsefromstring("", "text/html")) { // text/html parsing is natively supported return; } } catch (ex) {} proto.parsefromstring = function(markup, type) { if (/^\s*text\/html\s*(?:;|$)/i.test(type)) { var doc = document.implementation.createhtmldocument(""); if (markup.tolowercase().indexof('<!doctype') > -1) { doc.documentelement.innerhtml = markup; } else { doc.body.innerhtml = markup; } return doc; } else { return nativeparse.apply(this, arguments); } }; }(domparser)); specifications specification status comment html living standardthe definition of 'dom parsing' in that specification.
DOMTokenList.remove() - Web APIs
Web › API › DOMTokenList › remove
return value undefined examples in the following example we retrieve the list of classes set on a <span> element as a domtokenlist using element.classlist.
...the order you supply the tokens doesn't have to match the order they appear in the list: let span2 = document.getelementsbytagname("span")[0] let classes2 = span.classlist; classes2.remove("c", "b"); span2.textcontent = classes; specifications specification status comment domthe definition of 'remove()' in that specification.
DOMTokenList.replace() - Web APIs
Web › API › DOMTokenList › replace
examples in the following example we retrieve the list of classes set on a <span> element as a domtokenlist using element.classlist.
...to use with earlier versions of ie, refer to the polyfill at element.classlist#polyfill domtokenlist.prototype.replace = function (a, b) { if (this.contains(a)) { this.add(b); this.remove(a); return true; } return false; } specifications specification status comment domthe definition of 'replace()' in that specification.
DOMTokenList.supports() - Web APIs
Web › API › DOMTokenList › supports
syntax let trueorfalse = element.supports(token) parameters token a domstring containing the token to query for.
... example let iframe = document.getelementbyid('display'); if (iframe.sandbox.supports('an-upcoming-feature')) { // support code for mystery future feature } else { // fallback code } if (iframe.sandbox.supports('allow-scripts')) { // instruct frame to run javascript // // (note: this feature is well-supported; this is just an example!) // } specifications specification status comment credential management level 1 working draft initial definition.
DataTransfer.effectAllowed - Web APIs
Web › API › DataTransfer › effectAllowed
es</title> <meta content="width=device-width"> <style> div { margin: 0em; padding: 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; } </style> <script> function dragstart_handler(ev) { console.log("dragstart: dropeffect = " + ev.datatransfer.dropeffect + " ; effectallowed = " + ev.datatransfer.effectallowed); // add this element's id to the drag payload so the drop handler will // know which element to add to its tree ev.datatransfer.setdata("text", ev.target.id); ev.datatransfer.effectallowed = "move"; } function drop_handler(ev) { console.log("drop: dropeffect = " + ev.datatransfer.dropeffect + " ; effectallowed = " + ev.datatransfer.effectallowed); ev.preventdefault(); // get the id of the target and add the mo...
...ved element to the target's dom var data = ev.datatransfer.getdata("text"); ev.target.appendchild(document.getelementbyid(data)); } function dragover_handler(ev) { console.log("dragover: dropeffect = " + ev.datatransfer.dropeffect + " ; effectallowed = " + ev.datatransfer.effectallowed); ev.preventdefault(); // set the dropeffect to move ev.datatransfer.dropeffect = "move" } </script> <body> <h1>examples <code>datatransfer</code>.{<code>dropeffect</code>, <code>effectallowed</code>} properties</h1> <div> <p id="source" ondragstart="dragstart_handler(event);" draggable="true"> select this element, drag it to the drop zone and then release the selection to move the element.</p> </div> <div id="target" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">drop zone</d...
DataTransfer.items - Web APIs
Web › API › DataTransfer › items
<!doctype html> <html lang=en> <title>examples of datatransfer.{types,items} properties</title> <meta content="width=device-width"> <style> div { margin: 0em; padding: 2em; } #target { border: 1px solid black; } </style> <script> function dragstart_handler(ev) { console.log("dragstart: target.id = " + ev.target.id); // add this element's id to the drag payload so the drop handler will // know which element to add to its tree ev.datatransfer.setdata("text/plain", ev.target.id); ev.datatransfer.effectallowed = "move"; } function drop_handler(ev) { console.log("drop: target.id = " + ev.target.id); ev.preventdefault(); // get the id of the target and add the moved element to the target's dom var data = ev.datatransfer.getda...
...ta("text"); ev.target.appendchild(document.getelementbyid(data)); // print each format type if (ev.datatransfer.types != null) { for (var i=0; i < ev.datatransfer.types.length; i++) { console.log("...
DataTransfer.setData() - Web APIs
Web › API › DataTransfer › setData
e html> <html lang=en> <title>examples of datatransfer's setdata(), getdata() and cleardata()</title> <meta content="width=device-width"> <style> div { margin: 0em; padding: 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; } </style> <script> function dragstart_handler(ev) { console.log("dragstart"); // change the source element's background color to signify drag has started ev.currenttarget.style.border = "dashed"; // set the drag's format and data.
... use the event target's id for the data ev.datatransfer.setdata("text/plain", ev.target.id); } function dragover_handler(ev) { console.log("dragover"); ev.preventdefault(); } function drop_handler(ev) { console.log("drop"); ev.preventdefault(); // get the data, which is the id of the drop target var data = ev.datatransfer.getdata("text"); ev.target.appendchild(document.getelementbyid(data)); // clear the drag data cache (for all formats/types) ev.datatransfer.cleardata(); } </script> <body> <h1>examples of <code>datatransfer</code>: <code>setdata()</code>, <code>getdata()</code>, <code>cleardata()</code></h1> <div> <p id="source" ondragstart="dragstart_handler(event);" draggable="true"> select this element, drag it to the drop zone and then release the selection to move the e...
DataTransfer.types - Web APIs
Web › API › DataTransfer › types
<!doctype html> <html lang=en> <title>examples of datatransfer.{types,items} properties</title> <meta content="width=device-width"> <style> div { margin: 0em; padding: 2em; } #target { border: 1px solid black; } </style> <script> function dragstart_handler(ev) { console.log("dragstart: target.id = " + ev.target.id); // add this element's id to the drag payload so the drop handler will // know which element to add to its tree ev.datatransfer.setdata("text/plain", ev.target.id); ev.datatransfer.effectallowed = "move"; } function drop_handler(ev) { console.log("drop: target.id = " + ev.target.id); ev.preventdefault(); // get the id of the target and add the moved element to the target's dom var data = ev.datatransfer.getda...
...ta("text"); ev.target.appendchild(document.getelementbyid(data)); // print each format type if (ev.datatransfer.types != null) { for (var i=0; i < ev.datatransfer.types.length; i++) { console.log("...
DataTransfer - Web APIs
Web › API › DataTransfer
datatransfer.addelement() sets the drag source to the given element.
... living standard mozcursor, mozitemcount, mozsourcenode, mozusercancelled, addelement(), mozcleardataat(), mozgetdataat(), mozsetdataat() and moztypesat are gecko specific.
DeprecationReportBody - Web APIs
Web › API › DeprecationReportBody
the report details are displayed via the displayreports() fuction, which takes the observer callback's reports parameter as its parameter: function displayreports(reports) { const outputelem = document.queryselector('.output'); const list = document.createelement('ul'); outputelem.appendchild(list); for(let i = 0; i < reports.length; i++) { let listitem = document.createelement('li'); let textnode = document.createtextnode('report ' + (i + 1) + ', type: ' + reports[i].type); listitem.appendchild(textnode); let innerlist = document.createelement('ul'); listitem.appendchild(innerlist); list.appendchild(listitem); for (let k...
...ey in reports[i].body) { let innerlistitem = document.createelement('li'); let keyvalue = reports[i].body[key]; innerlistitem.textcontent = key + ': ' + keyvalue; innerlist.appendchild(innerlistitem); } } } the reports parameter contains an array of all the reports in the observer's report queue.
DirectoryEntrySync - Web APIs
Web › API › DirectoryEntrySync
security_err the application does not have permission to access the element referred to by path.
... security_err the application does not have permission to access the element referred to by path.
Document.all - Web APIs
Web › API › Document › all
in other words, it returns all of the document's elements, accessible by order (like an array) and by id (like a regular object).
... syntax var htmlallcollection = document.all; value an htmlallcollection which contains every element in the document.
Document: animationcancel event - Web APIs
Web › API › Document › animationcancel event
bubbles yes cancelable no interface animationevent event handler property onanimationcancel the original target for this event is the element that had the animation applied.
...for full details on this event please see the page on htmlelement: animationcancel.
Document: animationiteration event - Web APIs
Web › API › Document › animationiteration event
bubbles yes cancelable no interface animationevent event handler property onanimationiteration the original target for this event is the element that had the animation applied.
...for full details on this event please see the page on htmlelement: animationiteration.
Document: animationstart event - Web APIs
Web › API › Document › animationstart event
bubbles yes cancelable no interface animationevent event handler property onanimationstart the original target for this event is the element that had the animation applied.
...for full details on this event please see the page on htmlelement: animationstart.
Document: copy event - Web APIs
Web › API › Document › copy event
bubbles yes cancelable yes interface clipboardevent event handler property oncopy the original target for this event is the element that was the intended target of the copy action.
...for full details on this event please see the page on the element: copy event.
Document.createAttribute() - Web APIs
Web › API › Document › createAttribute
the dom does not enforce what sort of attributes can be added to a particular element in this manner.
... example var node = document.getelementbyid("div1"); var a = document.createattribute("my_attrib"); a.value = "newval"; node.setattributenode(a); console.log(node.getattribute("my_attrib")); // "newval" specifications specification status comment domthe definition of 'document.createattribute()' in that specification.
Document.createNodeIterator() - Web APIs
Web › API › Document › createNodeIterator
nodefilter.show_element 1 shows element nodes.
... example const nodeiterator = document.createnodeiterator( document.body, nodefilter.show_element, { acceptnode(node) { return node.nodename.tolowercase() === 'p' ?
Document.createTouch() - Web APIs
Web › API › Document › createTouch
in following code snippet, two touch objects are created for the target element.
... var target = document.getelementbyid("target"); var touch1 = document.createtouch(window, target, 1, 15, 20, 35, 40); var touch2 = document.createtouch(window, target, 2, 25, 30, 45, 50); specifications specification status comment touch eventsthe definition of 'document.createtouch()' in that specification.
Document.createTouchList() - Web APIs
Web › API › Document › createTouchList
in following code snippet, some touch objects are created for the target element and those touch points are then used to create some touchlist objects.
... var target = document.getelementbyid("target"); // create some touch points var touch1 = document.createtouch(window, target, 1, 15, 20, 35, 40); var touch2 = document.createtouch(window, target, 2, 25, 30, 45, 50); // create an empty touchlist objects var list0 = document.createtouchlist(); // create a touchlist with only one touch object var list1 = document.createtouchlist(touch1); // create a list with two touch objects var list2 = document.createtouchlist(touch1, touch2); specifications specification status comment touch eventsthe definition of 'document.createtouchlist()' in that specification.
Document: cut event - Web APIs
Web › API › Document › cut event
bubbles yes cancelable yes interface clipboardevent event handler property oncut the original target for this event is the element that was the intended target of the cut action.
...for full details on this event please see the page on the element: cut event.
Document.getAnimations() - Web APIs
Web › API › Document › getAnimations
the getanimations() method of the document interface returns an array of all animation objects currently in effect whose target elements are descendants of the document.
... return value an array of animation objects, each representing one animation currently associated with elements which are descendants of the document on which it's called.
Document.head - Web APIs
Web › API › Document › head
the head read-only property of the document interface returns the <head> element of the current document.
... syntax var objref = document.head; value an htmlheadelement.
Document.links - Web APIs
Web › API › Document › links
the links read-only property of the document interface returns a collection of all <area> elements and <a> elements in a document with a value for the href attribute.
... example var links = document.links; for(var i = 0; i < links.length; i++) { var linkhref = document.createtextnode(links[i].href); var linebreak = document.createelement("br"); document.body.appendchild(linkhref); document.body.appendchild(linebreak); } specifications specification status comment html living standardthe definition of 'document.links' in that specification.
Document.onfullscreenerror - Web APIs
Web › API › Document › onfullscreenerror
the document.onfullscreenerror property is an event handler for the fullscreenerror event that is sent to the document when it fails to transition into full-screen mode after a prior call to element.requestfullscreen().
... document.documentelement.requestfullscreen(); specifications specification status comment fullscreen apithe definition of 'onfullscreenerror' in that specification.
Document: paste event - Web APIs
Web › API › Document › paste event
bubbles yes cancelable yes interface clipboardevent event handler property onpaste the original target for this event is the element that was the intended target of the paste action.
...for full details on this event please see the page on the element: paste event.
Document: pointerenter event - Web APIs
Web › API › Document › pointerenter event
the pointerenter event fires when a pointing device is moved into the hit test boundaries of an element or one of its descendants, including as a result of a pointerdown event from a device that does not support hover (see pointerdown).
... bubbles no cancelable no interface pointerevent event handler property onpointerenter examples using addeventlistener(): document.addeventlistener('pointerenter', (event) => { console.log('pointer entered element'); }); using the onpointerenter event handler property: document.onpointerenter = (event) => { console.log('pointer entered element'); }; specifications specification status pointer events obsolete ...
Document: pointerleave event - Web APIs
Web › API › Document › pointerleave event
the pointerleave event is fired when a pointing device is moved out of the hit test boundaries of an element.
... bubbles no cancelable no interface pointerevent event handler property onpointerleave examples using addeventlistener(): document.addeventlistener('pointerleave', (event) => { console.log('pointer left element'); }); using the onpointerleave event handler property: document.onpointerleave = (event) => { console.log('pointer left element'); }; specifications specification status pointer events obsolete ...
Document.readyState - Web APIs
Web › API › Document › readyState
we can now access the dom elements.
... var span = document.createelement("span"); span.textcontent = "a <span> element."; document.body.appendchild(span); break; case "complete": // the page is fully loaded.
Document: transitioncancel event - Web APIs
Web › API › Document › transitioncancel event
bubbles yes cancelable no interface transitionevent event handler property globaleventhandlers.ontransitioncancel the original target for this event is the element that had the transition applied.
...for full details on this event please see the page on htmlelement: transitioncancel.
Document: transitionend event - Web APIs
Web › API › Document › transitionend event
the original target for this event is the element that had the transition applied.
...for full details on this event please see the page on htmlelement: transitionend.
Document: transitionrun event - Web APIs
Web › API › Document › transitionrun event
bubbles yes cancelable no interface transitionevent event handler property ontransitionrun the original target for this event is the element that had the transition applied.
...for full details on this event please see the page on htmlelement: transitionrun.
Document: transitionstart event - Web APIs
Web › API › Document › transitionstart event
bubbles yes cancelable no interface transitionevent event handler property globaleventhandlers.ontransitionstart the original target for this event is the element that had the transition applied.
...for full details on this event please see the page on htmlelement: transitionstart.
Document.write() - Web APIs
Web › API › Document › write
in the example above, the h1 element becomes a node in the document.
... note: starting with version 55, chrome will not execute <script> elements injected via document.write() when specific conditions are met.
Example - Web APIs
Web › API › Document Object Model › Using the W3C DOM Level 1 Core › Example
<html> <head> <title>my document</title> <script type="text/javascript"> function change() { // document.getelementsbytagname("h1") returns a nodelist of the h1 // elements in the document, and the first is number 0: var header = document.getelementsbytagname("h1").item(0); // the firstchild of the header is a text node: header.firstchild.data = "a dynamic document"; // now the header is "a dynamic document".
... var para = document.getelementsbytagname("p").item(0); para.firstchild.data = "this is the first paragraph."; // create a new text node for the second paragraph var newtext = document.createtextnode("this is the second paragraph."); // create a new element to be the second paragraph var newelement = document.createelement("p"); // put the text in the paragraph newelement.appendchild(newtext); // and put the paragraph on the end of the document by appending it to // the body (which is the parent of para) para.parentnode.appendchild(newelement); } </script> </head> <body> <input type="button" value="change this document." onclick="change()"> <h1>header</h1> <p>paragraph</p> </body> </head> ...
Using the W3C DOM Level 1 Core - Web APIs
Web › API › Document Object Model › Using the W3C DOM Level 1 Core
the following script would do the job: html content <body> <input type="button" value="change this document." onclick="change()"> <h2>header</h2> <p>paragraph</p> </body> javascript content function change() { // document.getelementsbytagname("h2") returns a nodelist of the <h2> // elements in the document, and the first is number 0: var header = document.getelementsbytagname("h2").item(0); // the firstchild of the header is a text node: header.firstchild.data = "a dynamic document"; // now the header is "a dynamic document".
... var para = document.getelementsbytagname("p").item(0); para.firstchild.data = "this is the first paragraph."; // create a new text node for the second paragraph var newtext = document.createtextnode("this is the second paragraph."); // create a new element to be the second paragraph var newelement = document.createelement("p"); // put the text in the paragraph newelement.appendchild(newtext); // and put the paragraph on the end of the document by appending it to // the body (which is the parent of para) para.parentnode.appendchild(newelement); } you can see this script as a complete example.
EffectTiming.direction - Web APIs
Web › API › EffectTiming › direction
the direction property of the web animations api dictionary effecttiming indicates an animation's playback direction along its timeline, as well as its behavior when it reaches the end of an iteration element.animate(), keyframeeffectreadonly(), and keyframeeffect() all accept an object of timing properties including direction.
... examples in the forgotten key example, alice waves her arm up and down by passing her an alternate value for her direction property: // get alice's arm, and wave it up and down document.getelementbyid("alice_arm").animate([ { transform: 'rotate(10deg)' }, { transform: 'rotate(-40deg)' } ], { easing: 'steps(2, end)', iterations: infinity, direction: 'alternate', duration: 600 }); specifications specification status comment web animationsthe definition of 'direction' in that specification.
EffectTiming.easing - Web APIs
Web › API › EffectTiming › easing
element.animate(), keyframeeffectreadonly(), and keyframeeffect() all accept an object of timing properties including easing.
... examples in the red queen's race example, we animate alice and the red queen by passing an easing of steps(7, end) to animate(): // define the key frames var spriteframes = [ { transform: 'translatey(0)' }, { transform: 'translatey(-100%)' } ]; // get the element that represents alice and the red queen var redqueen_alice_sprite = document.getelementbyid('red-queen_and_alice_sprite'); // animate alice and the red queen using steps() var redqueen_alice = redqueen_alice_sprite.animate( spriteframes, { easing: 'steps(7, end)', direction: "reverse", duration: 600, playbackrate: 1, iterations: infinity }); specifications specification s...
EffectTiming.iterations - Web APIs
Web › API › EffectTiming › iterations
element.animate(), keyframeeffectreadonly(), and keyframeeffect() all accept an object of timing properties including iterations.
... examples in the forgotten key example, alice waves her arm up and down the entire time the page is open by passing infinity as the value for her iterations property: // get alice's arm, and wave it up and down document.getelementbyid("alice_arm").animate([ { transform: 'rotate(10deg)' }, { transform: 'rotate(-40deg)' } ], { easing: 'steps(2, end)', iterations: infinity, direction: 'alternate', duration: 600 }); specifications specification status comment web animationsthe definition of 'iterations' in that specification.
Event.defaultPrevented - Web APIs
Web › API › Event › defaultPrevented
example this example logs attempts to visit links from two <a> elements.
... html <p><a id="link1" href="#link1">visit link 1</a></p> <p><a id="link2" href="#link2">try to visit link 2</a> (you can't)</p> <p id="log"></p> javascript function stoplink(event) { event.preventdefault(); } function logclick(event) { const log = document.getelementbyid('log'); if (event.target.tagname === 'a') { if (event.defaultprevented) { log.innertext = 'sorry, but you cannot visit this link!\n' + log.innertext; } else { log.innertext = 'visiting link...\n' + log.innertext; } } } const a = document.getelementbyid('link2'); a.addeventlistener('click', stoplink); document.addeventlistener('click', logclick); result specifications specification status comment ...
Event.eventPhase - Web APIs
Web › API › Event › eventPhase
this process starts with the window, then document, then the htmlhtmlelement, and so on through the elements until the target's parent is reached.
... <div id="d4">d4</div> </div> </div> </div> <div id="divinfo"></div> css div { margin: 20px; padding: 4px; border: thin black solid; } #divinfo { margin: 18px; padding: 8px; background-color:white; font-size:80%; } javascript let clear = false, divinfo = null, divs = null, usecapture = false; window.onload = function () { divinfo = document.getelementbyid('divinfo') divs = document.getelementsbytagname('div') chcapture = document.getelementbyid('chcapture') chcapture.onclick = function () { removelisteners() addlisteners() } clear() addlisteners() } function removelisteners() { for (let i = 0; i < divs.length; i++) { let d = divs[i] if (d.id != "divinfo") { d.removeeventlistener("click", ondivclick, true) ...
EventSource - Web APIs
Web › API › EventSource
var evtsource = new eventsource('sse.php'); var eventlist = document.queryselector('ul'); evtsource.onmessage = function(e) { var newelement = document.createelement("li"); newelement.textcontent = "message: " + e.data; eventlist.appendchild(newelement); } each received event causes our eventsource object's onmessage event handler to be run.
... it, in turn, creates a new <li> element and writes the message's data into it, then appends the new element to the list element already in the document.
EventTarget - Web APIs
Web › API › EventTarget
element, document, and window are the most common event targets, but other objects can be event targets, too.
... many event targets (including elements, documents, and windows) also support setting event handlers via onevent properties and attributes.
File.webkitRelativePath - Web APIs
Web › API › File › webkitRelativePath
the file.webkitrelativepath is a read-only property that contains a usvstring which specifies the file's path relative to the directory selected by the user in an <input> element with its webkitdirectory attribute set.
... html content <input type="file" id="filepicker" name="filelist" webkitdirectory multiple /> <ul id="listing"></ul> javascript content document.getelementbyid("filepicker").addeventlistener("change", function(event) { let output = document.getelementbyid("listing"); let files = event.target.files; for (let i=0; i<files.length; i++) { let item = document.createelement("li"); item.innerhtml = files[i].webkitrelativepath; output.appendchild(item); }; }, false); result specifications specification status commen...
Introduction to the File and Directory Entries API - Web APIs
Web › API › File and Directory Entries API › Introduction
the file and directory entries api interacts with other apis the file and directory entries api is designed to be used with other apis and elements on the web platform.
... for example, you are likely to use one of the following: xmlhttprequest (such as the send() method for file and blob objects) drag and drop api web workers (for the synchronous version of the file and directory entries api) the input element (to programmatically obtain a list of files from the element) the file and directory entries api is case sensitive the filesystem api is case-sensitive, and case-preserving.
FormData() - Web APIs
Web › API › FormData › FormData
syntax var formdata = new formdata(form) parameters form optional an html <form> element — when specified, the formdata object will be populated with the form's current keys/values using the name property of each element for the keys and their submitted value for the values.
... let myform = document.getelementbyid('myform'); let formdata = new formdata(myform); specifications specification status comment xmlhttprequestthe definition of 'formdata()' in that specification.
FullscreenOptions - Web APIs
Web › API › FullscreenOptions
the fullscreenoptions dictionary is used to provide configuration options when calling requestfullscreen() on an element to place that element into full-screen mode.
... properties navigationuioptional a string controlling whether or not to keep browser user interface elements visible while the element is in full-screen mode.
GlobalEventHandlers.oncuechange - Web APIs
Web › API › GlobalEventHandlers › oncuechange
the event is sent to both the texttrack and to the <track> element the track is being presented by, if any; in the latter case, its handler is on an htmltrackelement object.
... syntax element.oncuechange = handlerfunction; var handlerfunction = element.oncuechange; handlerfunction is either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.onkeydown - Web APIs
Web › API › GlobalEventHandlers › onkeydown
example this example logs the keyboardevent.code value whenever you press down a key inside the <input> element.
... html <input> <p id="log"></p> javascript const input = document.queryselector('input'); const log = document.getelementbyid('log'); input.onkeydown = logkey; function logkey(e) { log.textcontent += ` ${e.code}`; } result specifications specification status comment html living standardthe definition of 'onkeydown' in that specification.
GlobalEventHandlers.onkeypress - Web APIs
Web › API › GlobalEventHandlers › onkeypress
examples basic example this example logs the keyboardevent.code value whenever you press a key inside the <input> element.
... html <input> <p id="log"></p> javascript const input = document.queryselector('input'); const log = document.getelementbyid('log'); input.onkeypress = logkey; function logkey(e) { log.textcontent += ` ${e.code}`; } result filter keys with a regular expression this example filters the characters typed into a form field using a regular expression.
GlobalEventHandlers.onkeyup - Web APIs
Web › API › GlobalEventHandlers › onkeyup
example this example logs the keyboardevent.code value whenever you release a key inside the <input> element.
... html <input> <p id="log"></p> javascript const input = document.queryselector('input'); const log = document.getelementbyid('log'); input.onkeyup = logkey; function logkey(e) { log.textcontent += ` ${e.code}`; } result specifications specification status comment html living standardthe definition of 'onkeyup' in that specification.
GlobalEventHandlers.onmouseenter - Web APIs
Web › API › GlobalEventHandlers › onmouseenter
the mouseenter event is fired when a pointing device (usually a mouse) is moved over the element that has the listener attached.
... syntax element.onmouseenter = handlerfunction; var handlerfunction = element.onmouseenter; handlerfunction is either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.onmouseleave - Web APIs
Web › API › GlobalEventHandlers › onmouseleave
the mouseleave event is fired when a pointing device (usually a mouse) is moved off the element that has the listener attached.
... syntax element.onmouseleave = handlerfunction; var handlerfunction = element.onmouseleave; handlerfunction is either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.onmousemove - Web APIs
Web › API › GlobalEventHandlers › onmousemove
html <p><a href="#" data-tooltip="first link">see a tooltip here &hellip;</a></p> <p><a href="#" data-tooltip="second link">&hellip; or here!</a></p> css .tooltip { position: absolute; z-index: 9999; padding: 6px; background: #ffd; border: 1px #886 solid; border-radius: 5px; } javascript const tooltip = new (function() { const node = document.createelement('div'); node.classname = 'tooltip'; node.setattribute('hidden', ''); document.body.appendchild(node); this.follow = function(event) { node.style.left = event.clientx + 20 + 'px'; node.style.top = event.clienty + 10 + 'px'; }; this.show = function(event) { node.textcontent = event.target.dataset.tooltip; node.removeattribute('hidden'); }; this.hide = function() {...
... node.setattribute('hidden', ''); }; })(); const links = document.queryselectorall('a'); links.foreach(link => { link.onmouseover = tooltip.show; link.onmousemove = tooltip.follow; link.onmouseout = tooltip.hide; }); result draggable elements we also have an example available showing the use of the onmousemove event handler with draggable objects — view the example in action.
GlobalEventHandlers.onplay - Web APIs
Web › API › GlobalEventHandlers › onplay
syntax element.onplay = handlerfunction; var handlerfunction = element.onplay; handlerfunction should be either null or a javascript function specifying the handler for the event.
... example <p>this example demonstrates how to assign an "onplay" event to a video element.</p> <video controls onplay="alertplay()"> <source src="mov_bbb.mp4" type="video/mp4"> <source src="mov_bbb.ogg" type="video/ogg"> your browser does not support html5 video.
GlobalEventHandlers.onselect - Web APIs
Web › API › GlobalEventHandlers › onselect
examples this example logs the text you select inside a <textarea> element.
... html <textarea>try selecting some text in this element.</textarea> <p id="log"></p> javascript function logselection(event) { const log = document.getelementbyid('log'); const selection = event.target.value.substring(event.target.selectionstart, event.target.selectionend); log.textcontent = `you selected: ${selection}`; } const textarea = document.queryselector('textarea'); textarea.onselect = logselection; result specification specification status comment html living standardthe definition of 'onselect' in that specification.
GlobalEventHandlers.ontransitioncancel - Web APIs
Web › API › GlobalEventHandlers › ontransitioncancel
by moving the mouse off a hover-transitioning element.
... syntax var transitioncancelhandler = target.ontransitioncancel; target.ontransitioncancel = function value a function to be called when a transitioncancel event occurs indicating that a css transition has been cancelled on the target, where the target object is an html element (htmlelement), document (document), or window (window).
GlobalEventHandlers - Web APIs
Web › API › GlobalEventHandlers
the globaleventhandlers mixin describes the event handlers common to several interfaces like htmlelement, document, or window.
... event handlers these event handlers are defined on the globaleventhandlers mixin, and implemented by htmlelement, document, window, as well as by workerglobalscope for web workers.
msAudioDeviceType - Web APIs
Web › API › HTMLAudioElement › msAudioDeviceType
the msaudiodevicetype property of the html <audio> element, is a read/write proprietary attribute, specific to internet explorer and microsoft edge.
... syntax <audio src="sound.mp3" msaudiodevicetype="communications" /> by default, audio on your system will output to your default speakers and be considered a foreground element, meaning that the audio will play only when the element is active in the app.
contentDocument - Web APIs
Web › API › HTMLIFrameElement › contentDocument
example of contentdocument var iframedocument = document.getelementsbytagname("iframe")[0].contentdocument; iframedocument.body.style.backgroundcolor = "blue"; // this would turn the iframe blue.
... specifications specification status comment html living standardthe definition of 'htmliframeelement: contentdocument' in that specification.
srcdoc - Web APIs
Web › API › HTMLIFrameElement › srcdoc
the srcdoc property of the htmliframeelement specifies the content of the page.
... examples var iframe = document.createelement("iframe"); iframe.srcdoc = `<!doctype html><p>hello world!</p>`; document.body.appendchild(iframe); specifications specification status comment html living standardthe definition of 'htmliframeelement: srcdoc' in that specification.
msClearEffects - Web APIs
Web › API › HTMLMediaElement › msClearEffects
the mscleareffects method of the htmlmediaelement, is a proprietary method specific to internet explorer and microsoft edge.
... syntax htmlmediaelement.mscleareffects(); parameters this method has no parameters.
msStereo3DPackingMode - Web APIs
Web › API › HTMLVideoElement › msStereo3DPackingMode
syntax htmlvideoelement.msstereo3dpackingmode(topbottom, sidebyside, none); value the following values return, or set, the stereo 3-d content packing as "topbottom", "sidebyside", or "none" for regular 2-d video.
... see also htmlvideoelement microsoft api extensions ...
msStereo3DRenderMode - Web APIs
Web › API › HTMLVideoElement › msStereo3DRenderMode
syntax htmlvideoelement.msstereo3drendermode(mono, stereo); value the following values set the stereo display to mono or stereo.
... see also htmlvideoelement microsoft api extensions ...
Dragging and Dropping Multiple Items - Web APIs
Web › API › HTML Drag and Drop API › Multiple items
output(" item " + i + ":\n"); var types = dt.moztypesat(i); for (var t = 0; t < types.length; t++) { output(" " + types[t] + ": "); try { var data = dt.mozgetdataat(types[t], i); output("(" + (typeof data) + ") : <" + data + " >\n"); } catch (ex) { output("<<error>>\n"); dump(ex); } } } } function output(text) { document.getelementbyid("output").textcontent += text; dump(text); } </script> </head> <body> <div id="output" style="min-height: 100px; white-space: pre; border: 1px solid black;" ondragenter="document.getelementbyid('output').textcontent = ''; event.stoppropagation(); event.preventdefault();" ondragover="event.stoppropagation(); event.preventdefault();" ondrop="event.stoppropagation(); event.pre...
...this allows a drop to occur on that element.
Recommended Drag Types - Web APIs
Web › API › HTML Drag and Drop API › Recommended drag types
for example, it would be suitable to set its data to the value of the innerhtml property of an element.
... dragging nodes nodes and elements in a document may be dragged using the application/x-moz-node type.
Working with the History API - Web APIs
Web › API › History API › Working with the History API
in a xul document, it creates the specified xul element.
... in other documents, it creates an element with a null namespace uri.
IIRFilterNode.getFrequencyResponse() - Web APIs
Web › API › IIRFilterNode › getFrequencyResponse
d, one containing the input frequencies, and two to receive the output magnitude and phase values: var myfrequencyarray = new float32array(5); myfrequencyarray[0] = 1000; myfrequencyarray[1] = 2000; myfrequencyarray[2] = 3000; myfrequencyarray[3] = 4000; myfrequencyarray[4] = 5000; var magresponseoutput = new float32array(5); var phaseresponseoutput = new float32array(5); next we create a <ul> element in our html to contain our results, and grab a reference to it in our javascript: <p>iir filter frequency response for: </p> <ul class="freq-response-output"> </ul> var freqresponseoutput = document.queryselector('.freq-response-output'); finally, after creating our filter, we use getfrequencyresponse() to generate the response data and put it in our arrays, then loop through each data set and...
... function calcfrequencyresponse() { iirfilter.getfrequencyresponse(myfrequencyarray, magresponseoutput, phaseresponseoutput); for(i = 0; i <= myfrequencyarray.length-1;i++){ var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + myfrequencyarray[i] + 'hz</strong>: magnitude ' + magresponseoutput[i] + ', phase ' + phaseresponseoutput[i] + ' radians.'; freqresponseoutput.appendchild(listitem); } } calcfrequencyresponse(); specifications specification status comment web audio apithe definition of 'getfrequencyresponse()' in that specification.
IntersectionObserver.takeRecords() - Web APIs
Web › API › IntersectionObserver › takeRecords
the intersectionobserver method takerecords() returns an array of intersectionobserverentry objects, one for each targeted element which has experienced an intersection change since the last time the intersections were checked, either explicitly through a call to this method or implicitly by an automatic call to the observer's callback.
... return value an array of intersectionobserverentry objects, one for each target element whose intersection with the root has changed since the last time the intersections were checked.
IntersectionObserverEntry.time - Web APIs
Web › API › IntersectionObserverEntry › time
syntax var time = intersectionobserverentry.time; value a domhighrestimestamp which indicates the time at which the target element experienced the intersection change described by the intersectionobserverentry.
... example see timing element visibility with the intersection observer api for a complete example which uses the time property to track how long elements are visible to the user.
KeyboardEvent.key - Web APIs
Web › API › KeyboardEvent › key
if the key produces a character key that would result in a character being inserted into possibly an <input>, <textarea> or an element with htmlelement.contenteditable set to true, the beforeinput and input event types are fired in that order.
...id="console-log"></pre> </div> </div> css .fx { -webkit-display: flex; display: flex; margin-left: -20px; margin-right: -20px; } .fx > div { padding-left: 20px; padding-right: 20px; } .fx > div:first-child { width: 30%; } .flex { -webkit-flex: 1; flex: 1; } #test-target { display: block; width: 100%; margin-bottom: 10px; } javascript let textarea = document.getelementbyid('test-target'), consolelog = document.getelementbyid('console-log'), btnclearconsole = document.getelementbyid('btn-clear-console'); function logmessage(message) { document.getelementbyid("console-log").innerhtml += message + "<br>"; } textarea.addeventlistener('keydown', (e) => { if (!e.repeat) logmessage(`key "${e.key}" pressed [event: keydown]`); else logmessage(`key "${e.
KeyboardLayoutMap.has() - Web APIs
Web › API › KeyboardLayoutMap › has
the has() method of the keyboardlayoutmap interface returns a boolean indicating whether the object has an element with the specified key.
... syntax var aboolean = keyboardlayoutmap.has(key) parameters key the key of an element to search for in the map.
LayoutShift - Web APIs
Web › API › LayoutShift
the layoutshift interface of the layout instability api provides insights into the stability of web pages based on movements of the elements on the page.
... layoutshift.sources returns an array of layoutshiftattribution objects with information on the elements that were shifted.
LinkStyle - Web APIs
Web › API › LinkStyle
linkstyle is a raw interface and no object of this type can be created; it is implemented by htmllinkelement and htmlstyleelement objects.
... linkstyle.sheet read only returns the cssstylesheet object associated with the given element, or null if there is none.
Location - Web APIs
Web › API › Location
it is a synonym for htmlhyperlinkelementutils.href, though it can't be used to modify the value.
... examples // create anchor element and use href property for the purpose of this example // a more correct alternative is to browse to the url and use document.location or window.location var url = document.createelement('a'); url.href = 'https://developer.mozilla.org:8080/search?q=url#search-results-close-container'; console.log(url.href); // https://developer.mozilla.org:8080/search?q=url#search-results-close-container console.log(url.protocol); // https: console.log(url.host); // developer.mozilla.org:8080 console.log(url.hostname); // developer.mozilla.org console.log(url.port); // 8080 console.log(url.pathname); // /search console.log(url.search); // ?q=url console.log(url.hash); // #search-results-close-container console.log(url.origin); // https://developer.
MSCandidateWindowShow - Web APIs
Web › API › MSCandidateWindowShow
web applications need only register for this event once per element (the handler will remain valid for the lifetime of the element).
... example in ie11, developers can detect the opening of the ime candidate window by listening to mscandidatewindowshow event, then call getcandidatewindowclientrect() function to find out where the candidate window is and position the suggestion ui away from it: var context = document.getelementbyid("mysearchbox").msgetinputcontext(); context.addeventlistener("mscandidatewindowshow", candidatewindowshowhandler); function candidatewindowshowhandler(e) { var imerect = context.getcandidatewindowclientrect(); var suggestionrect = document.getelementbyid("mysuggestionlist").getboundingclientrect(); // check if the two rects intersect, and position them away from each other.
MSManipulationEvent - Web APIs
Web › API › MSManipulationEvent
msmanipulationevent provides contextual information when contact is made to the screen and an element is manipulated.
... events msmanipulationstatechanged: event fires when the state of an element being manipulated has changed.
MSSiteModeEvent - Web APIs
Web › API › MSSiteModeEvent
srcelement gets the element that the event was originally dispatched to.
... target gets the element that is the target of the event.
MediaDevices - Web APIs
Web › API › MediaDevices
var video = document.queryselector('video'); var constraints = window.constraints = { audio: false, video: true }; var errorelement = document.queryselector('#errormsg'); navigator.mediadevices.getusermedia(constraints) .then(function(stream) { var videotracks = stream.getvideotracks(); console.log('got stream with constraints:', constraints); console.log('using video device: ' + videotracks[0].label); stream.onremovetrack = function() { console.log('stream ended'); }; window.stream = stream; // make variable...
...ht.exact + ' px is not supported by your device.'); } else if (error.name === 'permissiondeniederror') { errormsg('permissions have not been granted to use your camera and ' + 'microphone, you need to allow the page access to your devices in ' + 'order for the demo to work.'); } errormsg('getusermedia error: ' + error.name, error); }); function errormsg(msg, error) { errorelement.innerhtml += '<p>' + msg + '</p>'; if (typeof error !== 'undefined') { console.error(error); } } specifications specification status comment media capture and streamsthe definition of 'mediadevices' in that specification.
MediaKeyStatusMap.forEach() - Web APIs
Web › API › MediaKeyStatusMap › forEach
syntax mediakeystatusmap.foreach(callback[, thisarg]) parameters callback function to execute for each element, taking three arguments: currentvalue the current element being processed in the array.
... index the index of the current element being processed in the array.
MediaRecorder: dataavailable event - Web APIs
Web › API › MediaRecorder › dataavailable event
var chunks = []; mediarecorder.addeventlistener('stop', (event) => { console.log("data available after mediarecorder.stop() called."); var audio = document.createelement('audio'); audio.controls = true; var blob = new blob(chunks, { 'type' : 'audio/ogg; codecs=opus' }); var audiourl = window.url.createobjecturl(blob); audio.src = audiourl; console.log("recorder stopped"); }); mediarecorder.addeventlistener('dataavailable', (event) => { chunks.push(event.data); }); ...
... var chunks = []; mediarecorder.onstop = function(e) { console.log("data available after mediarecorder.stop() called."); var audio = document.createelement('audio'); audio.controls = true; var blob = new blob(chunks, { 'type' : 'audio/ogg; codecs=opus' }); var audiourl = window.url.createobjecturl(blob); audio.src = audiourl; console.log("recorder stopped"); } mediarecorder.ondataavailable = function(e) { chunks.push(e.data); } ...
MediaStream.onaddtrack - Web APIs
Web › API › MediaStream › onaddtrack
this event is fired when the browser adds a track to the stream (such as when a rtcpeerconnection is renegotiated or a stream being captured using htmlmediaelement.capturestream() gets a new set of tracks because the media element being captured loaded a new source.
... stream.onaddtrack = function(event) { let tracklist = document.getelementbyid("tracks"); let label = document.createelement("li"); label.innerhtml = event.track.kind + ": " + event.track.label; tracklist.appendchild(label); }; specifications specification status comment media capture and streamsthe definition of 'mediastream.onaddtrack' in that specification.
MediaStream.onremovetrack - Web APIs
Web › API › MediaStream › onremovetrack
this event is fired when the browser removes a track from the stream (such as when a rtcpeerconnection is renegotiated or a stream being captured using htmlmediaelement.capturestream() gets a new set of tracks because the media element being captured loaded a new source.
... stream.onremovetrack = function(event) { let tracklist = document.getelementbyid("tracks"); let label = document.createelement("li"); label.innerhtml = "removed: " + event.track.kind + ": " + event.track.label; tracklist.appendchild(label); }; specifications specification status comment media capture and streamsthe definition of 'mediastream.onremovetrack' in that specification.
MediaStreamTrack: mute event - Web APIs
Web › API › MediaStreamTrack › mute event
musictrack.addeventlistener("mute", event => { document.getelementbyid("timeline-widget").style.backgroundcolor = "#aaa"; }, false); musictrack.addeventlistener("unmute", event => { document.getelementbyid("timeline-widget").style.backgroundcolor = "#fff"; }, false); with these event handlers in place, when the track musictrack enters its muted state, the element with the id timeline-widget gets its background color changed to #aaa.
...the following example shows this: musictrack.onmute = event => { document.getelementbyid("timeline-widget").style.backgroundcolor = "#aaa"; } musictrack.mute = event = > { document.getelementbyid("timeline-widget").style.backgroundcolor = "#fff"; } specifications specification status comment media capture and streamsthe definition of 'mute' in that specification.
MediaStreamTrack: unmute event - Web APIs
Web › API › MediaStreamTrack › unmute event
musictrack.addeventlistener("mute", event => { document.getelementbyid("timeline-widget").style.backgroundcolor = "#aaa"; }, false); musictrack.addeventlistener("unmute", event => { document.getelementbyid("timeline-widget").style.backgroundcolor = "#fff"; }, false); with these event handlers in place, when the track musictrack enters its muted state, the element with the id timeline-widget gets its background color changed to #aaa.
...the following example shows this: musictrack.onmute = event => { document.getelementbyid("timeline-widget").style.backgroundcolor = "#aaa"; } musictrack.mute = event = > { document.getelementbyid("timeline-widget").style.backgroundcolor = "#fff"; } specifications specification status comment media capture and streamsthe definition of 'unmute' in that specification.
Media Capture and Streams API (Media Stream) - Web APIs
Web › API › Media Streams API
a non-local mediastream may be representing to a media element, like <video> or <audio>, a stream originating over the network, and obtained via the webrtc rtcpeerconnection api, or a stream created using the web audio api mediastreamaudiosourcenode.
...it can be a media elements, like <audio> or <video>, the webrtc rtcpeerconnection api or a web audio api mediastreamaudiosourcenode.
Microsoft API extensions - Web APIs
Web › API › Microsoft Extensions
touch apis element.mszoomto() mscontentzoom msmanipulationevent msmanipulationstatechanged msmanipulationviewsenabled mspointerhover media apis htmlvideoelement.msframestep() htmlvideoelement.mshorizontalmirror htmlvideoelement.msinsertvideoeffect() htmlvideoelement.msislayoutoptimalforplayback htmlvideoelement.msisstereo3d htmlvideoelement.mszoom htmlaudioelement.msaudiocategory htmlaudioelement.msaudiodevicetype htmlmediaelement.mscleareffects() htmlmediaelement.msinsert...
...rectangle msstereo3dpackingmode msstereo3drendermode onmsvideoformatchanged onmsvideoframestepcompleted onmsvideooptimallayoutchanged msfirstpaint pinned sites apis mssitemodeevent mssitemodejumplistitemremoved msthumbnailclick other apis x-ms-aria-flowfrom x-ms-acceleratorkey x-ms-format-detection mscaching mscachingenabled mscapslockwarningoff event.msconverturl() mselementresize document.mselementsfromrect() msisstatichtml navigator.mslaunchuri() mslaunchuricallback element.msmatchesselector() msprotocols msputpropertyenabled mswriteprofilermark ...
msRealTime - Web APIs
Web › API › MsRealTime
msrealtime is a read/write property which specifies whether or not to enable low-latency playback on the media element.
... syntax ptr = object.msrealtime; value boolean value set to true indicates that low-latency playback will be enabled on the media element.
MutationObserver.disconnect() - Web APIs
Web › API › MutationObserver › disconnect
usage notes if the element being observed is removed from the dom, and then subsequently released by the browser's garbage collection mechanism, the mutationobserver is likewise deleted.
... const targetnode = document.queryselector("#someelement"); const observeroptions = { childlist: true, attributes: true } const observer = new mutationobserver(callback); observer.observe(targetnode, observeroptions); /* some time later...
MutationObserverInit.attributeFilter - Web APIs
Web › API › MutationObserverInit › attributeFilter
example in this example, a mutation observer is set up to watch for changes to the status and username attributes in any elements contained within a subtree that displays the names of users in a chat room.
...ation) { switch(mutation.type) { case "attributes": switch(mutation.attributename) { case "status": userstatuschanged(mutation.target.username, mutation.target.status); break; case "username": usernamechanged(mutation.oldvalue, mutation.target.username); break; } break; } }); } var userlistelement = document.queryselector("#userlist"); var observer = new mutationobserver(callback); observer.observe(userlistelement, { attributefilter: [ "status", "username" ], attributeoldvalue: true, subtree: true }); the callback() function—which will be passed into the observe() method when starting the observer, looks at each item in the list of mutationrecord objects.
Using Navigation Timing - Web APIs
Web › API › Navigation timing API › Using Navigation Timing
et loadingtime = now - performance.timing.navigationstart; document.queryselector(".output").innertext = loadingtime + " ms"; }, false); this code, executed when the load event occurs, subtracts from the current time the time at which the navigation whose timing was recorded began (performance.timing.navigationstart), and outputs that information to the screen by inserting it into an element.
...this information is output to the screen just like the page load time was previously: by inserting it into the element with class "output".
Navigator.clipboard - Web APIs
Web › API › Navigator › clipboard
navigator.clipboard.readtext().then( cliptext => document.queryselector(".cliptext").innertext = cliptext); this snippet replaces the contents of the element whose class is "cliptext" with the text contents of the clipboard.
... if the clipboard is empty or doesn't contain text, the "cliptext" element's contents are cleared.
Node.getRootNode() - Web APIs
Web › API › Node › getRootNode
this will differ in exact form depending on where you called getrootnode(); for example: calling it on an element inside a standard web page will return an htmldocument object representing the entire page.
... calling it on an element inside a shadow dom will return the associated shadowroot.
Node.isConnected - Web APIs
Web › API › Node › isConnected
examples standard dom a standard dom example: let test = document.createelement('p'); console.log(test.isconnected); // returns false document.body.appendchild(test); console.log(test.isconnected); // returns true shadow dom a shadow dom example: // create a shadow root var shadow = this.attachshadow({mode: 'open'}); // create some css to apply to the shadow dom var style = document.createelement('style'); console.log(style.isconnected); // returns false style.textcont...
...ent = ` .wrapper { position: relative; } .info { font-size: 0.8rem; width: 200px; display: inline-block; border: 1px solid black; padding: 10px; background: white; border-radius: 10px; opacity: 0; transition: 0.6s all; positions: absolute; bottom: 20px; left: 10px; z-index: 3 } `; // attach the created style element to the shadow dom shadow.appendchild(style); console.log(style.isconnected); // returns true polyfill node.isconnected can be polyfilled with the following code for ie10 and edgehtml: /* * node.isconnected polyfill for ie and edgehtml * 2020-02-04 * * by eli grey, https://eligrey.com * public domain.
Node.isDefaultNamespace() - Web APIs
Web › API › Node › isDefaultNamespace
syntax result = node.isdefaultnamespace(namespaceuri); parameters namespaceuri is a string representing the namespace against which the element will be checked.
... example var xulns = "http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"; var el = document.getelementsbytagnamens(xulns, 'textbox')[0]; alert(el.isdefaultnamespace(xulns)); // true specifications specification status comment domthe definition of 'node: isdefaultnamespace' in that specification.
Node.isEqualNode() - Web APIs
Web › API › Node › isEqualNode
two nodes are equal when they have the same type, defining characteristics (for elements, this would be their id, number of children, and so forth), its attributes match, and so on.
... html <div>this is the first element.</div> <div>this is the second element.</div> <div>this is the first element.</div> <p id="output"></p> css #output { width: 440px; border: 2px solid black; border-radius: 5px; padding: 10px; margin-top: 20px; display: block; } javascript let output = document.getelementbyid("output"); let divlist = document.getelementsbytagname("div"); output.innerhtml += "div 0 equals div 0...
Node.ownerDocument - Web APIs
Web › API › Node › ownerDocument
syntax var document = element.ownerdocument; value document is the top-level document object in which all the child nodes are created.
... example // given a node "p", get the top-level html // child of the document object var d = p.ownerdocument; var html = d.documentelement; specifications specification status comment domthe definition of 'node: ownerdocument' in that specification.
Node.previousSibling - Web APIs
Web › API › Node › previousSibling
syntax previousnode = node.previoussibling; example <img id="b0"> <img id="b1"> <img id="b2"> console.log(document.getelementbyid("b1").previoussibling); // <img id="b0"> console.log(document.getelementbyid("b2").previoussibling.id); // "b1" notes gecko-based browsers insert text nodes into a document to represent whitespace in the source markup.
... therefore a node obtained, for example, using node.firstchild or node.previoussibling may refer to a whitespace text node rather than the actual element the author intended to get.
Node.replaceChild() - Web APIs
Web › API › Node › replaceChild
example // given: // <div> // <span id="childspan">foo bar</span> // </div> // create an empty element node // without an id, any attributes, or any content var sp1 = document.createelement("span"); // give it an id attribute called 'newspan' sp1.id = "newspan"; // create some content for the new element.
... var sp1_content = document.createtextnode("new replacement span element."); // apply that content to the new element sp1.appendchild(sp1_content); // build a reference to the existing node to be replaced var sp2 = document.getelementbyid("childspan"); var parentdiv = sp2.parentnode; // replace existing node sp2 with the new span element sp1 parentdiv.replacechild(sp1, sp2); // result: // <div> // <span id="newspan">new replacement span element.</span> // </div> specifications specification status comment domthe definition of 'node: replacechild' in that specification.
NodeIterator.whatToShow - Web APIs
Web › API › NodeIterator › whatToShow
nodefilter.show_element 1 shows element nodes.
... example var nodeiterator = document.createnodeiterator( document.body, nodefilter.show_element + nodefilter.show_comment + nodefilter.show_text, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); if( (nodeiterator.whattoshow == nodefilter.show_all) || (nodeiterator.whattoshow % (nodefilter.show_comment*2)) >= nodefilter.show_comment) { // nodeiterator will show comments } specifications specification status comment domth...
Path2D() - Web APIs
Web › API › Path2D › Path2D
<canvas id="canvas"></canvas> const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); let path1 = new path2d(); path1.rect(10, 10, 100,100); let path2 = new path2d(path1); path2.moveto(220, 60); path2.arc(170, 60, 50, 0, 2 * math.pi); ctx.stroke(path2); using svg paths this example creates a path2d path using svg path data.
... <canvas id="canvas"></canvas> const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); let p = new path2d('m10 10 h 80 v 80 h -80 z'); ctx.fill(p); specification specification status comment html living standardthe definition of 'path2d()' in that specification.
Path2D.addPath() - Web APIs
Web › API › Path2D › addPath
we then create a matrix using document.createelementns() and createsvgmatrix().
... const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // create first path and add a rectangle let p1 = new path2d(); p1.rect(0, 0, 100, 150); // create second path and add a rectangle let p2 = new path2d(); p2.rect(0, 0, 100, 75); // create transformation matrix that moves 200 points to the right let m = document.createelementns('http://www.w3.org/2000/svg', 'svg').createsvgmatrix(); m.a = 1; m.b = 0; m.c = 0; m.d = 1; m.e = 200; m.f = 0; // add second path to the first path p1.addpath(p2, m); // draw the first path ctx.fill(p1); result specifications...
Payment Request API - Web APIs
Web › API › Payment Request API
accessibility: as the browser controls the input elements of the payment sheet, it can assure consistent keyboard and screen reader accessibility on every website without developers needing to do anything.
... note: the api is available inside cross-origin <iframe> elements only if they have had the allowpaymentrequest attribute set on them.
Using the Performance API - Web APIs
Web › API › Performance API › Using the Performance API
in the following example, json serialization for the performance, performance.timing and performance.navigation objects is printed in the object element.
... function print_json() { var json; var o = document.getelementsbytagname("output")[0]; if (window.performance.tojson === undefined) { json = "window.performance.tojson() is not supported"; o.innerhtml += json + "<br>"; } else { var s; json = window.performance.tojson(); // print the performance object s = json.stringify(json); o.innerhtml = "<p>performance = " + s + "</p>"; // print the performance.timing and performance.navigation objects var perf = json.parse(s); var timing = perf.timing; o.innerhtml += "<p>peformance.timing = " + json.stringify(timing) + "</p>"; var navigation = perf.navigation; o.innerhtml += "<p>peformance.navigation = " + json.stringify(navigation) + "</p>"; } } specifications the interfaces described in...
PublicKeyCredentialCreationOptions.excludeCredentials - Web APIs
Web › API › PublicKeyCredentialCreationOptions › excludeCredentials
excludecredentials, an optional property of the publickeycredentialcreationoptions dictionary, is an array whose elements are descriptors for the public keys already existing for a given user.
... syntax excludecredentials = publickeycredentialcreationoptions.excludecredentials value an array whose elements are objects with the following properties: type a string describing type of public-key credential to be created.
RTCDTMFSender: tonechange event - Web APIs
Web › API › RTCDTMFSender › tonechange event
examples this example establishes a handler for the tonechange event which updates an element to display the currently playing tone in its content, or, if all tones have played, the string "<none>".
... this can be done using addeventlistener(): dtmfsender.addeventlistener("tonechange", ev => { let tone = ev.tone; if (tone === "") { tone = "&lt;none&gt;"; } document.getelementbyid("playingtone").innertext = tone; }, false); you can also just set the ontonechange event handler property directly: dtmfsender.ontonechange = function( ev ) { let tone = ev.tone; if (tone === "") { tone = "&lt;none&gt;" } document.getelementbyid("playingtone").innertext = tone; }; specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'tonechange' in that specification.
RTCDTMFToneChangeEvent.tone - Web APIs
Web › API › RTCDTMFToneChangeEvent › tone
syntax var tone = dtmftonechangeevent.tone; example this example establishes a handler for the tonechange event which updates an element to display the currently playing tone in its content, or, if all tones have played, the string "<none>".
... dtmfsender.ontonechange = function( ev ) { let tone = ev.tone; if (tone === "") { tone = "&lt;none&gt;" } document.getelementbyid("playingtone").innertext = tone; }; specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdtmftonechangeevent.tone' in that specification.
RTCDataChannel.label - Web APIs
Web › API › RTCDataChannel › label
example this sample creates a data channel on an rtcpeerconnection, then, some time later, sets the content of a ui element to display the channel's name.
...*/ document.getelementbyid("channel-name").innerhtml = "<span class='channelname'>" + dc.label + "</span>"; specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.label' in that specification.
RTCDataChannel.onopen - Web APIs
Web › API › RTCDataChannel › onopen
it then establishes an open event handler which updates some user interface elements to prepare them for being used to send messages over the data channel.
... let dc = mypeerconnection.createdatachannel("message channel"); dc.onopen = function(event) { let messagebox = document.getelementbyid("messagebox"); let sendbutton = document.getelementbyid("sendbutton"); messagebox.disabled = false; messagebox.focus(); sendbutton.disabled = false; } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.onopen' in that specification.
RTCIceTransport: selectedcandidatepairchange event - Web APIs
Web › API › RTCIceTransport › selectedcandidatepairchange event
let icetransport = pc.getsenders[0].transport.icetransport; let localprotoelem = document.getelementbyid("local-protocol"); let remoteprotoelem = document.getelementbyid("remote-protocol"); icetransport.addeventlistener("selectedcandidatepairchange", ev => { let pair = icetransport.getselectedcandidatepair(); localprotoelem.innertext = pair.local.protocol.touppercase(); remoteprotoelem.innertext = pair.remote.protocol.touppercase(); }, false) this can also be done by setting the onselect...
... let icetransport = pc.getsenders[0].transport.icetransport; let localprotoelem = document.getelementbyid("local-protocol"); let remoteprotoelem = document.getelementbyid("remote-protocol"); icetransport.onselectedcandidatepairchange = ev => { let pair = icetransport.getselectedcandidatepair(); localprotoelem.innertext = pair.local.protocol.touppercase(); remoteprotoelem.innertext = pair.remote.protocol.touppercase(); } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'selectedcandidatepairchange' in that specification.
RTCPeerConnection.getStats() - Web APIs
Web › API › RTCPeerConnection › getStats
example this example creates a periodic function using setinterval() that collects statistics for an rtcpeerconnection every second, generating an html-formatted report and inserting it into a specific element in the dom.
... once the html for the report is generated, it is injected into the element whose class is "stats-box" by setting its innerhtml property.
RTCPeerConnection.onaddstream - Web APIs
Web › API › RTCPeerConnection › onaddstream
example this code, based on an older version of our signaling and video calling sample, responds to addstream events by setting the video source for a <video> element to the stream specified in the event, and then enabling a "hang up" button in the app's user interface.
... pc.onaddstream = function(event) { document.getelementbyid("received_video").srcobject = event.stream; document.getelementbyid("hangup-button").disabled = false; }; you can also use addeventlistener() to add a handler for addstream events to an rtcpeerconnection.
RTCPeerConnection: track event - Web APIs
Web › API › RTCPeerConnection › track event
pc = new rtcpeerconnection({ iceservers: [ { urls: "turn:fake.turnserver.url", username: "someusername", credential: "somepassword" } ] }); pc.addeventlistener("track", e => { videoelement.srcobject = e.streams[0]; hangupbutton.disabled = false; }, false); the event handler assigns the new track's first stream to an existing <video> element, identified using the variable videoelement.
... pc.ontrack = e => { videoelement.srcobject = e.streams[0]; hangupbutton.disabled = false; return false; } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'track' in that specification.
RTCRemoteOutboundRtpStreamStats.localId - Web APIs
Web › API › RTCRemoteOutboundRtpStreamStats › localId
it takes as input the rtcpeerconnection being tested, calls getstats() to get a new rtcstatsreport with current statistics, then computes the results it's looking for, outputting those results as appropriate to the user by appending appropriate html to the contents of the <div> element whose class is stats-box.
... the remainder of the networkteststop() function constructs the html used to display the output of the collected and computed results to the user, then append it to the element statsbox, which we're using to show the status updates to the user.
RTCRtpReceiver.getStats() - Web APIs
Web › API › RTCRtpReceiver › getStats
example this simple example obtains the statistics for an rtcrtpreceiver and updates an element's innertext to display the number of packets lost.
... receiver.getstats().then(function(stats) { document.getelementbyid("lostpackets").innertext = stats.packetslost; }); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcrtpreceiver.getstats()' in that specification.
RTCRtpSender.getStats() - Web APIs
Web › API › RTCRtpSender › getStats
example this simple example obtains the statistics for an rtcrtpsender and updates an element's innertext to display the current round trip time for requests on the sender.
... sender.getstats().then(function(stats) { document.getelementbyid("currentrtt").innertext = stats.roundtriptime; }); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcrtpsender.getstats()' in that specification.
Range.extractContents() - Web APIs
Web › API › Range › extractContents
syntax documentfragment = range.extractcontents(); example basic example var range = document.createrange(); range.selectnode(document.getelementsbytagname("div").item(0)); var documentfragment = range.extractcontents(); document.body.appendchild(documentfragment); moving items between containers this example lets you move items between two containers.
... html <p id="list1">123456</p> <button id="swap">swap selected item(s)</button> <p id="list2">abcdef</p> css body { pointer-events: none; } p { border: 1px solid; font-size: 2em; padding: .3em; } button { font-size: 1.2em; padding: .5em; pointer-events: auto; } javascript const list1 = document.getelementbyid('list1'); const list2 = document.getelementbyid('list2'); const button = document.getelementbyid('swap'); button.addeventlistener('click', e => { selection = window.getselection(); for (let i = 0; i < selection.rangecount; i++) { const range = selection.getrangeat(i); if (range.commonancestorcontainer === list1 || range.commonancestorcontainer.parentnode === list1) { ...
Range.getClientRects() - Web APIs
Web › API › Range › getClientRects
this is created by aggregating the results of calls to element.getclientrects() for all the elements in the range.
... syntax rectlist = range.getclientrects() example range = document.createrange(); range.selectnode(document.getelementsbytagname("div").item(0)); rectlist = range.getclientrects(); specification specification status comment css object model (cssom) view modulethe definition of 'range.getclientrects()' in that specification.
Range.selectNodeContents() - Web APIs
Web › API › Range › selectNodeContents
example range = document.createrange(); referencenode = document.getelementsbytagname("div")[0]; range.selectnodecontents(referencenode); live sample this example lets the user select and deselect a paragraph with buttons.
... html <p id="p"><b>use the buttons below</b> to select or deselect the contents of this paragraph.</p> <button id="select-button">select paragraph</button> <button id="deselect-button">deselect paragraph</button> javascript const p = document.getelementbyid('p'); const selectbutton = document.getelementbyid('select-button'); const deselectbutton = document.getelementbyid('deselect-button'); selectbutton.addeventlistener('click', e => { // clear any current selection const selection = window.getselection(); selection.removeallranges(); // select paragraph const range = document.createrange(); range.selectnodecontents(p); selection...
ReadableStream.tee() - Web APIs
Web › API › ReadableStream › tee
the tee() method of the readablestream interface tees the current readable stream, returning a two-element array containing the two resulting branches as new readablestream instances.
... if (done) { console.log("stream complete"); return; } // value for fetch streams is a uint8array charsreceived += value.length; const chunk = value; let listitem = document.createelement('li'); listitem.textcontent = 'read ' + charsreceived + ' characters so far.
RenderingContext - Web APIs
Web › API › RenderingContext
renderingcontext is a webidl typedef which can refer to any one of the interfaces that represent a graphics rendering context within a <canvas> element: canvasrenderingcontext2d, webglrenderingcontext, or webgl2renderingcontext.
... the primary use of this type is the definition of the <canvas> element's htmlcanvaselement.getcontext() method, which returns a renderingcontext (meaning it returns any one of the rendering context types).
Report - Web APIs
Web › API › Report
the report details are displayed via the displayreports() fuction, which takes the observer callback's reports parameter as its parameter: function displayreports(reports) { const outputelem = document.queryselector('.output'); const list = document.createelement('ul'); outputelem.appendchild(list); for(let i = 0; i < reports.length; i++) { let listitem = document.createelement('li'); let textnode = document.createtextnode('report ' + (i + 1) + ', type: ' + reports[i].type); listitem.appendchild(textnode); let innerlist = document.createelement('ul'); listitem.appendchild(innerlist); list.appendchild(listitem); for (let k...
...ey in reports[i].body) { let innerlistitem = document.createelement('li'); let keyvalue = reports[i].body[key]; innerlistitem.textcontent = key + ': ' + keyvalue; innerlist.appendchild(innerlistitem); } } } the reports parameter contains an array of all the reports in the observer's report queue.
ResizeObserver() - Web APIs
Web › API › ResizeObserver › ResizeObserver
the resizeobserver constructor creates a new resizeobserver object, which can be used to report changes to the content or border box of an element or the bounding box of an svgelement.
...the function is called with two parameters: entries an array of resizeobserverentry objects that can be used to access the new dimensions of the element after each change.
ResizeObserver.observe() - Web APIs
Web › API › ResizeObserver › observe
the observe() method of the resizeobserver interface starts observing the specified element or svgelement.
... syntax resizeobserver.observe(target, options); parameters target a reference to an element or svgelement to be observed.
ResizeObserver.unobserve() - Web APIs
Web › API › ResizeObserver › unobserve
the unobserve() method of the resizeobserver interface ends the observing of a specified element or svgelement.
... syntax void unobserve(target); parameters target a reference to an element or svgelement to be unobserved.
format - Web APIs
Web › API › SVGAltGlyphElement › format
the svgaltglyphelement.format property is a domstring that defines the format of the given font.
... it has the same meaning as the 'format' property of svgglyphrefelement property.
SVGAnimatedPoints - Web APIs
Web › API › SVGAnimatedPoints
svg animated points interface the svganimatedpoints interface supports elements which have a points attribute which holds a list of coordinate values and which support the ability to animate that attribute.
... additionally, the points attribute on the original element accessed via the xml dom (e.g., using the getattribute() method call) will reflect any changes made to the svganimatedpoints.points attribut.
SVGExternalResourcesRequired - Web APIs
Web › API › SVGExternalResourcesRequired
the svgexternalresourcesrequired interface defines an interface which applies to all elements where this element or one of its descendants can reference an external resource.
... properties svgexternalresourcesrequired.externalresourcesrequired corresponds to the externalresourcesrequired attribute of the given element.
SVGPoint - Web APIs
Web › API › SVGPoint
syntax retobject = svgsvgelement.createsvgpoint() value the returned value is an svgpoint object.
... example // create an svgpoint in the user coordinate system let s = document.getelementbyid("svg-elementid").createsvgpoint(); // then, set the x and y values of the returned svgpoint object // (which is the variable `s`) s.y = 10; s.x = 10; ...
The 'X' property - Web APIs
Web › API › SVGRect › The X property
the x property describes the horizontal coordinate of the position of the element.
...its syntax is the same as that for <length> // rect draws a rectangle with upper left-hand corner at x,y, with width w, and height h, with optional style // standard reference: http://www.w3.org/tr/svg11/shapes.html#rectelement func (svg *svg) rect(x float64, y float64, w float64, h float64, s ...string) { svg.printf(`<rect %s %s`, dim(x, y, w, h, svg.decimals), endstyle(s, emptyclose)) } ​ ...
SVGTransformable - Web APIs
Web › API › SVGTransformable
svg transformable interface interface svgtransformable contains properties and methods that apply to all elements which have attribute transform.
... interface overview also implement none methods none properties readonly svganimatedtransformlist transform normative document svg 1.1 (2nd edition) properties name type description transform svganimatedtransformlist corresponds to attribute transform on the given element.
SVGURIReference - Web APIs
Web › API › SVGURIReference
troke-width="2px" /><text x="76" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">svgurireference</text></a></svg></div> a:hover text { fill: #0095dd; pointer-events: all;} properties svgurireference.href read only an svganimatedstring that represents the value of the href attribute, and, on elements that are defined to support it, the deprecated xlink:href attribute.
... on getting href, an svganimatedstring object is returned that reflects the href attribute, and if the element is defined to support the deprecated xlink:href attribute, additionally reflects that deprecated attribute.
Selection.containsNode() - Web APIs
Web › API › Selection › containsNode
example check for selection this snippet checks whether anything inside the body element is selected.
... html <p>can you find the secret word?</p> <p>hmm, where <span id="secret" style="color:transparent">secret</span> could it be?</p> <p id="win" hidden>you found it!</p> javascript const secret = document.getelementbyid('secret'); const win = document.getelementbyid('win'); // listen for selection changes document.addeventlistener('selectionchange', () => { const selection = window.getselection(); const found = selection.containsnode(secret); win.toggleattribute('hidden', !found); }); result specifications specification status comment selection apithe definition of 'selec...
Using server-sent events - Web APIs
Web › API › Server-sent events › Using server-sent events
for example, assuming the client script is on example.com: const evtsource = new eventsource("//api.example.com/ssedemo.php", { withcredentials: true } ); once you've instantiated your event source, you can begin listening for messages from the server by attaching a handler for the message event: evtsource.onmessage = function(event) { const newelement = document.createelement("li"); const eventlist = document.getelementbyid("list"); newelement.innerhtml = "message: " + event.data; eventlist.appendchild(newelement); } this code listens for incoming messages (that is, notices from the server that do not have an event field on them) and appends the message text to a list in the document's html.
... you can also listen for events with addeventlistener(): evtsource.addeventlistener("ping", function(event) { const newelement = document.createelement("li"); const time = json.parse(event.data).time; newelement.innerhtml = "ping at " + time; eventlist.appendchild(newelement); }); this code is similar, except that it will be called automatically whenever the server sends a message with the event field set to "ping"; it then parses the json in the data field and outputs that information.
ShadowRoot.delegatesFocus - Web APIs
Web › API › ShadowRoot › delegatesFocus
the delegatesfocus read-only property of the shadowroot interface returns a boolean that indicates whether delegatesfocus was set when the shadow was attached (see element.attachshadow()).
... examples let customelem = document.queryselector('my-shadow-dom-element'); let shadow = customelem.shadowroot; ...
ShadowRoot.mode - Web APIs
Web › API › ShadowRoot › mode
when the mode of a shadow root is "closed", the shadow root’s implementation internals are inaccessible and unchangeable from javascript—in the same way the implementation internals of, for example, the <video> element are inaccessible and unchangeable from javascript.
... examples let customelem = document.queryselector('my-shadow-dom-element'); let shadow = customelem.shadowroot; // another way to check whether the shadow root is open; it will return null if not if(shadow) { // if it is open, close it to stop people stealing our secrets!
SpeechSynthesis: voiceschanged event - Web APIs
Web › API › SpeechSynthesis › voiceschanged event
you can use the voiceschanged event in an addeventlistener method: var synth = window.speechsynthesis; synth.addeventlistener('voiceschanged', function() { var voices = synth.getvoices(); for(i = 0; i < voices.length ; i++) { var option = document.createelement('option'); option.textcontent = voices[i].name + ' (' + voices[i].lang + ')'; option.setattribute('data-lang', voices[i].lang); option.setattribute('data-name', voices[i].name); voiceselect.appendchild(option); } }); or use the onvoiceschanged event handler property: synth.onvoiceschanged = function() { var voices = synth.getvoices(); for(i = 0; i < voices.length ; i++) { ...
... var option = document.createelement('option'); option.textcontent = voices[i].name + ' (' + voices[i].lang + ')'; option.setattribute('data-lang', voices[i].lang); option.setattribute('data-name', voices[i].name); voiceselect.appendchild(option); } } specifications specification status comment web speech apithe definition of 'speech synthesis events' in that specification.
SpeechSynthesis - Web APIs
Web › API › SpeechSynthesis
inside the inputform.onsubmit handler, we stop the form submitting with preventdefault(), create a new speechsynthesisutterance instance containing the text from the text <input>, set the utterance's voice to the voice selected in the <select> element, and start the utterance speaking via the speechsynthesis.speak() method.
...eselect = document.queryselector('select'); var pitch = document.queryselector('#pitch'); var pitchvalue = document.queryselector('.pitch-value'); var rate = document.queryselector('#rate'); var ratevalue = document.queryselector('.rate-value'); var voices = []; function populatevoicelist() { voices = synth.getvoices(); for(i = 0; i < voices.length ; i++) { var option = document.createelement('option'); option.textcontent = voices[i].name + ' (' + voices[i].lang + ')'; if(voices[i].default) { option.textcontent += ' -- default'; } option.setattribute('data-lang', voices[i].lang); option.setattribute('data-name', voices[i].name); voiceselect.appendchild(option); } } populatevoicelist(); if (speechsynthesis.onvoiceschanged !== undefined) { speechsynt...
SpeechSynthesisUtterance - Web APIs
Web › API › SpeechSynthesisUtterance
inside the inputform.onsubmit handler, we stop the form submitting with preventdefault(), use the constructor to create a new utterance instance containing the text from the text <input>, set the utterance's voice to the voice selected in the <select> element, and start the utterance speaking via the speechsynthesis.speak() method.
... var synth = window.speechsynthesis; var voices = synth.getvoices(); var inputform = document.queryselector('form'); var inputtxt = document.queryselector('input'); var voiceselect = document.queryselector('select'); for(var i = 0; i < voices.length; i++) { var option = document.createelement('option'); option.textcontent = voices[i].name + ' (' + voices[i].lang + ')'; option.value = i; voiceselect.appendchild(option); } inputform.onsubmit = function(event) { event.preventdefault(); var utterthis = new speechsynthesisutterance(inputtxt.value); utterthis.voice = voices[voiceselect.value]; synth.speak(utterthis); inputtxt.blur(); } specifications specification status comment web speech apithe definition of 'speechsynthesisutterance' in that specifica...
Storage - Web APIs
Web › API › Storage
if(!localstorage.getitem('bgcolor')) { populatestorage(); } setstyles(); function populatestorage() { localstorage.setitem('bgcolor', document.getelementbyid('bgcolor').value); localstorage.setitem('font', document.getelementbyid('font').value); localstorage.setitem('image', document.getelementbyid('image').value); } function setstyles() { var currentcolor = localstorage.getitem('bgcolor'); var currentfont = localstorage.getitem('font'); var currentimage = localstorage.getitem('image'); document.getelementbyid('bgcolor').value = curr...
...entcolor; document.getelementbyid('font').value = currentfont; document.getelementbyid('image').value = currentimage; htmlelem.style.backgroundcolor = '#' + currentcolor; pelem.style.fontfamily = currentfont; imgelem.setattribute('src', currentimage); } note: to see this running as a complete working example, see our web storage demo.
StyleSheet.ownerNode - Web APIs
Web › API › StyleSheet › ownerNode
this is usually an html <link> or <style> element, but can also return a processing instruction node in the case of <?xml-stylesheet ?>.
... syntax noderef = stylesheet.ownernode example <html lang="en"> <head> <link rel="stylesheet" href="example.css"> </head> <body> <button onclick="alert(document.stylesheets[0].ownernode)">show example.css’s ownernode</button> </body> </html> // displays "object htmllinkelement" notes for style sheets that are included by other style sheets, such as with @import, the value of this property is null.
SubmitEvent - Web APIs
Web › API › SubmitEvent
submitter read only an htmlelement object which identifies the button or other element which was invoked to trigger the form being submitted.
...each of the submit elements' id is used to identify which payment processor the button corresponds to.
TextMetrics.width - Web APIs
Web › API › TextMetrics › width
examples given this <canvas> element: <canvas id="canvas"></canvas> ...
... you can get a textmetrics object using the following code: const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); let text = ctx.measuretext('foo'); // textmetrics object text.width; // 16; specifications specification html living standardthe definition of 'textmetrics.width' in that specification.
TextMetrics - Web APIs
Web › API › TextMetrics
html <canvas id="canvas" width="550" height="500"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const baselinesabovealphabetic = ['fontboundingboxascent', 'actualboundingboxascent', 'emheightascent', 'hangingbaseline']; const baselinesbelowalphabetic = ['ideographicbaseline', 'emheightdescent', 'actualboundingboxdescent', 'fontboundingboxdescent']; const baselines = [...baselinesabovealphabetic, ...ba...
... it can therefore be useful to use the sum of actualboundingboxleft and actualboundingboxright as a more accurate way to get the absolute text width: const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const text = 'abcdefghijklmnop'; ctx.font = 'italic 50px serif'; const textmetrics = ctx.measuretext(text); console.log(textmetrics.width); // 459.8833312988281 console.log(math.abs(textmetrics.actualboundingboxleft) + math.abs(textmetrics.actualboundingboxright)); // 462.8833333333333 specifications specification ...
Touch.clientX - Web APIs
Web › API › Touch › clientX
in this example, we assume the user initiates a touch on an element with an id of source, moves within the element or out of the element and then releases contact with the surface.
... // register touchstart and touchend listeners for element 'source' var src = document.getelementbyid("source"); var clientx, clienty; src.addeventlistener('touchstart', function(e) { // cache the client x/y coordinates clientx = e.touches[0].clientx; clienty = e.touches[0].clienty; }, false); src.addeventlistener('touchend', function(e) { var deltax, deltay; // compute the change in x and y coordinates.
Touch.clientY - Web APIs
Web › API › Touch › clientY
in this example, we assume the user initiates a touch on an element with an id of source, moves within the element or out of the element and then releases contact with the surface.
... // register touchstart and touchend listeners for element 'source' var src = document.getelementbyid("source"); var clientx, clienty; src.addeventlistener('touchstart', function(e) { // cache the client x/y coordinates clientx = e.touches[0].clientx; clienty = e.touches[0].clienty; }, false); src.addeventlistener('touchend', function(e) { var deltax, deltay; // compute the change in x and y coordinates.
Touch.pageX - Web APIs
Web › API › Touch › pageX
in following simple code snippet, we assume the user initiates one or more touch contacts on the source element, moves the touch points and then releases all contacts with the surface.
... // register a touchmove listeners for the 'source' element var src = document.getelementbyid("source"); src.addeventlistener('touchmove', function(e) { // iterate through the touch points that have moved and log each // of the pagex/y coordinates.
Touch.pageY - Web APIs
Web › API › Touch › pageY
in following simple code snippet, we assume the user initiates one or more touch contacts on the source element, moves the touch points and then releases all contacts with the surface.
... // register a touchmove listeners for the 'source' element var src = document.getelementbyid("source"); src.addeventlistener('touchmove', function(e) { // iterate through the touch points that have moved and log each // of the pagex/y coordinates.
Touch.radiusX - Web APIs
Web › API › Touch › radiusX
when the src element is touched, the element's width and height will be calculate based on the touch point's radiusx and radiusy values and the element will then be rotated using the touch point's rotationangle.
...</div> var src = document.getelementbyid("src"); src.addeventlistener('touchstart', rotate); src.addeventlistener('touchmove', rotate); src.addeventlistener('touchend', rotate); function rotate (e) { var touch = e.changedtouches.item(0); // turn off default event handling e.preventdefault(); // rotate element 'src'.
Touch.screenX - Web APIs
Web › API › Touch › screenX
in following simple code snippet, we assume the user initiates multiple touch contacts on an element with an id of source and then releases contacts with the surface.
... // register a touchstart listeners for the 'source' element var src = document.getelementbyid("source"); src.addeventlistener('touchstart', function(e) { // iterate through the touch points and log each screenx/y coordinate.
TransitionEvent - Web APIs
Web › API › TransitionEvent
transitionevent.pseudoelement read only is a domstring, starting with ::, containing the name of the pseudo-element the animation runs on.
... if the transition doesn't run on a pseudo-element but on the element, an empty string: ''.
TreeWalker.whatToShow - Web APIs
Web › API › TreeWalker › whatToShow
nodefilter.show_element 1 shows element nodes.
... syntax nodetypes = treewalker.whattoshow; example var treewalker = document.createtreewalker( document.body, nodefilter.show_element + nodefilter.show_comment + nodefilter.show_text, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); if( (treewalker.whattoshow == nodefilter.show_all) || (treewalker.whattoshow % (nodefilter.show_comment*2)) >= nodefilter.show_comment) { // treewalker will show comments } specifications specification status comment domthe defi...
URL.createObjectURL() - Web APIs
Web › API › URL › createObjectURL
using object urls for media streams in older versions of the media source specification, attaching a stream to a <video> element required creating an object url for the mediastream.
... important: if you still have code that relies on createobjecturl() to attach streams to media elements, you need to update your code to simply set srcobject to the mediastream directly.
URL API - Web APIs
Web › API › URL API
the filltablewithparameters() function below takes as input a htmltableelement object representing a <table>.
... function filltablewithparameters(tbl) { let url = new url(document.location.href); url.searchparams.sort(); let keys = url.searchparams.keys(); for (let key of keys) { let val = url.searchparams.get(key); let row = document.createelement("tr"); let cell = document.createelement("td"); cell.innertext = key; row.appendchild(cell); cell = document.createelement("td"); cell.innertext = val; row.appendchild(cell); tbl.appendchild(row); }; } a working version of this example can be found on glitch.
validityState.badInput - Web APIs
Web › API › ValidityState › badInput
for example, if you have a number input element whose content is a string.
... example <input type="number" id="age"> var input = document.getelementbyid("age"); if (input.validity.badinput) { console.log("bad input detected…"); } else { console.log("content of input ok."); } specifications specification status comment html living standardthe definition of 'validitystate.badinput' in that specification.
ValidityState.patternMismatch - Web APIs
Web › API › ValidityState › patternMismatch
the read-only patternmismatch property of a validitystate object indicates if the value of an <input>, after having been edited by the user, does not conform to the constraints set by the element's pattern attribute.
...when true, the element matches the :invalid css pseudo-classes.
ValidityState.rangeOverflow - Web APIs
Web › API › ValidityState › rangeOverflow
the read-only rangeoverflow property of a validitystate object indicates if the value of an <input>, after having been edited by the user, does not conform to the constraints set by the element's max attribute.
...when true, the element matches the :invalid and :out-of-range css pseudo-classes.
ValidityState.rangeUnderflow - Web APIs
Web › API › ValidityState › rangeUnderflow
the read-only rangeunderflow property of a validitystate object indicates if the value of an <input>, after having been edited by the user, does not conform to the constraints set by the element's min attribute.
...when true, the element matches the :invalid and :out-of-range css pseudo-classes.
ValidityState.stepMismatch - Web APIs
Web › API › ValidityState › stepMismatch
the read-only stepmismatch property of a validitystate object indicates if the value of an <input>, after having been edited by the user, does not conform to the constraints set by the element's step attribute.
... if true, the element matches the :invalid and :out-of-range css pseudo-classes.
VideoPlaybackQuality.totalFrameDelay - Web APIs
Web › API › VideoPlaybackQuality › totalFrameDelay
the videoplaybackquality.totalframedelay read-only property returns a double containing the sum of the frame delay since the creation of the associated htmlvideoelement.
... syntax value = videoplaybackquality.totalframedelay; example var videoelt = document.getelementbyid('my_vid'); var quality = videoelt.getvideoplaybackquality(); alert(quality.totalframedelay); ...
VideoTrack.id - Web APIs
Web › API › VideoTrack › id
this id can be used with the videotracklist.gettrackbyid() method to locate a specific track within the media associated with a media element.
... syntax var trackid = videotrack.id; value a domstring which identifies the track, suitable for use when calling gettrackbyid() on an videotracklist such as the one specified by a media element's videotracks property.
VideoTrackList: change event - Web APIs
Web › API › VideoTrackList › change event
bubbles no cancelable no interface event event handler property onchange examples using addeventlistener(): const videoelement = document.queryselector('video'); videoelement.videotracks.addeventlistener('change', (event) => { console.log(`'${event.type}' event fired`); }); // changing the value of `selected` will trigger the `change` event const toggletrackbutton = document.queryselector('.toggle-track'); toggletrackbutton.addeventlistener('click', () => { const track = videoelement.videotracks[0]; track.selected = !track.selected; }); using the onchange event handler property: const videoelement = d...
...ocument.queryselector('video'); videoelement.videotracks.onchange = (event) => { console.log(`'${event.type}' event fired`); }; // changing the value of `selected` will trigger the `change` event const toggletrackbutton = document.queryselector('.toggle-track'); toggletrackbutton.addeventlistener('click', () => { const track = videoelement.videotracks[0]; track.selected = !track.selected; }); specifications specification status html living standardthe definition of 'change' in that specification.
WebGL2RenderingContext.drawArraysInstanced() - Web APIs
Web › API › WebGL2RenderingContext › drawArraysInstanced
in addition, it can execute multiple instances of the range of elements.
... instancecount a glsizei specifying the number of instances of the range of elements to execute.
WebGL2RenderingContext.texImage3D() - Web APIs
Web › API › WebGL2RenderingContext › texImage3D
syntax void gl.teximage3d(target, level, internalformat, width, height, depth, border, format, type, glintptr offset); void gl.teximage3d(target, level, internalformat, width, height, depth, border, format, type, htmlcanvaselement source); void gl.teximage3d(target, level, internalformat, width, height, depth, border, format, type, htmlimageelement source); void gl.teximage3d(target, level, internalformat, width, height, depth, border, format, type, htmlvideoelement source); void gl.teximage3d(target, level, internalformat, width, height, depth, border, format, type, imagebitmap source); void gl.teximage3d(target, level, internalformat, width, height, depth, border, format, ty...
...d_short gl.short gl.unsigned_int gl.int gl.half_float gl.float gl.unsigned_int_2_10_10_10_rev gl.unsigned_int_10f_11f_11f_rev gl.unsigned_int_5_9_9_9_rev gl.unsigned_int_24_8 gl.float_32_unsigned_int_24_8_rev (pixels must be null) source one of the following objects can be used as a pixel source for the texture: arraybufferview, imagebitmap, imagedata, htmlimageelement, htmlcanvaselement, htmlvideoelement.
WebGLRenderingContext.drawingBufferHeight - Web APIs
Web › API › WebGLRenderingContext › drawingBufferHeight
it should match the height attribute of the <canvas> element associated with this context, but might differ if the implementation is not able to provide the requested height.
... syntax gl.drawingbufferheight; examples given this <canvas> element: <canvas id="canvas"></canvas> you can get the height of the drawing buffer with the following lines: var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); gl.drawingbufferheight; // 150 specifications specification status comment webgl 1.0the definition of 'webglrenderingcontext.drawingbufferheight' in that specification.
WebGLRenderingContext.drawingBufferWidth - Web APIs
Web › API › WebGLRenderingContext › drawingBufferWidth
it should match the width attribute of the <canvas> element associated with this context, but might differ if the implementation is not able to provide the requested width.
... syntax gl.drawingbufferwidth; examples given this <canvas> element: <canvas id="canvas"></canvas> you can get the width of the drawing buffer with the following lines: var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); gl.drawingbufferwidth; // 300 specifications specification status comment webgl 1.0the definition of 'webglrenderingcontext.drawingbufferwidth' in that specification.
WebGLRenderingContext.getContextAttributes() - Web APIs
Web › API › WebGLRenderingContext › getContextAttributes
examples given this <canvas> element <canvas id="canvas"></canvas> and given this webgl context var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); gl.getcontextattributes(); the getcontextattributes method returns an object that describes the attributes set on this context, for example: { alpha: true, antialias: true, depth: true, failifmajorperformancecaveat: false, powerpreference: "default", premultip...
...liedalpha: true, preservedrawingbuffer: false, stencil: false, desynchronized: false } the context attributes can be set when creating the context using the htmlcanvaselement.getcontext() method: canvas.getcontext('webgl', { antialias: false, depth: false }); see getcontext() for more information about the individual attributes.
WebGLRenderingContext.getExtension() - Web APIs
Web › API › WebGLRenderingContext › getExtension
var canvas = document.getelementbyid('canvas'); gl = canvas.getcontext('webgl'); gl.getextension('webgl_lose_context').losecontext(); webgl extensions extensions for the webgl api are registered in the webgl extension registry.
... the current extensions are: angle_instanced_arrays ext_blend_minmax ext_color_buffer_float ext_color_buffer_half_float ext_disjoint_timer_query ext_float_blend ext_frag_depth ext_srgb ext_shader_texture_lod ext_texture_compression_bptc ext_texture_compression_rgtc ext_texture_filter_anisotropic khr_parallel_shader_compile oes_element_index_uint oes_fbo_render_mipmap oes_standard_derivatives oes_texture_float oes_texture_float_linear oes_texture_half_float oes_texture_half_float_linear oes_vertex_array_object ovr_multiview2 webgl_color_buffer_float webgl_compressed_texture_astc webgl_compressed_texture_atc webgl_compressed_texture_etc webgl_compressed_texture_etc1 webgl_compressed_texture_pvrtc webgl_compressed_texture_s3tc webgl_compressed_texture_s3tc_srgb we...
WebGLRenderingContext.getSupportedExtensions() - Web APIs
Web › API › WebGLRenderingContext › getSupportedExtensions
examples var canvas = document.getelementbyid('canvas'); gl = canvas.getcontext('webgl'); var extensions = gl.getsupportedextensions(); // array [ 'angle_instanced_arrays', 'ext_blend_minmax', ...
...the current extensions are: angle_instanced_arrays ext_blend_minmax ext_color_buffer_float ext_color_buffer_half_float ext_disjoint_timer_query ext_float_blend ext_frag_depth ext_srgb ext_shader_texture_lod ext_texture_compression_bptc ext_texture_compression_rgtc ext_texture_filter_anisotropic khr_parallel_shader_compile oes_element_index_uint oes_fbo_render_mipmap oes_standard_derivatives oes_texture_float oes_texture_float_linear oes_texture_half_float oes_texture_half_float_linear oes_vertex_array_object ovr_multiview2 webgl_color_buffer_float webgl_compressed_texture_astc webgl_compressed_texture_atc webgl_compressed_texture_etc webgl_compressed_texture_etc1 webgl_compressed_texture_pvrtc webgl_compressed_...
WebGLRenderingContext.getUniform() - Web APIs
Web › API › WebGLRenderingContext › getUniform
return value the returned type depends on the uniform type: uniform type returned type webgl 1 only boolean glboolean int glint float glfloat vec2 float32array (with 2 elements) ivec2 int32array (with 2 elements) bvec2 array of glboolean (with 2 elements) vec3 float32array (with 3 elements) ivec3 int32array (with 3 elements) bvec3 array of glboolean (with 3 elements) vec4 float32array (with 4 elements) ivec4 int32array (with 4 elements) bvec4 array of glboolean (with 4 eleme...
...nts) mat2 float32array (with 4 elements) mat3 float32array (with 9 elements) mat4 float32array (with 16 elements) sampler2d glint samplercube glint additionally available in webgl 2 uint gluint uvec2 uint32array (with 2 elements) uvec3 uint32array (with 3 elements) uvec4 uint32array (with 4 elements) mat2x3 float32array (with 6 elements) mat2x4 float32array (with 8 elements) mat3x2 float32array (with 6 elements) mat3x4 float32array (with 12 elements) mat4x2 float32array (with 8 elements) mat4x3 float32array (with 12 elements) any sampler type glint examples var loc = gl.getuniformlocation(pr...
Clearing with colors - Web APIs
Web › API › WebGL API › By example › Clearing with colors
<p>a very simple webgl program that shows some color.</p> <!-- text within a canvas element is displayed only if canvas is not supported.
... window.removeeventlistener(evt.type, setupwebgl, false); // references to the document elements.
Using textures in WebGL - Web APIs
Web › API › WebGL API › Tutorial › Using textures in WebGL
note: cors support for webgl textures and the crossorigin attribute for image elements is implemented in gecko 8.0.
... note: cors support for cross-domain videos and the crossorigin attribute for <video> elements is implemented in gecko 12.0.
Inputs and input sources - Web APIs
Web › API › WebXR Device API › Inputs
you also need to be able to determine which input source to use for what activities; for example, if the user has two controllers, which one will be tracked for manipulating ui elements, or will both?
... the primary action is the action that is triggered when the user engages the main control element that serves a special purpose.
Controlling multiple parameters with ConstantSourceNode - Web APIs
Web › API › Web Audio API › Controlling multiple parameters with ConstantSourceNode
html the html content for this example is primarily a button to toggle the oscillator tones on and off and an <input> element of type range to control the volume of two of the three oscillators.
... playbutton and volumecontrol references to the play button and volume control elements.
Window: animationcancel event - Web APIs
Web › API › Window › animationcancel event
bubbles yes cancelable no interface animationevent event handler property onanimationcancel the original target for this event is the element that had the animation applied.
...for full details on this event please see the page on htmlelement: animationcancel.
Window: animationiteration event - Web APIs
Web › API › Window › animationiteration event
bubbles yes cancelable no interface animationevent event handler property onanimationiteration the original target for this event is the element that had the animation applied.
...for full details on this event please see the page on htmlelement: animationiteration.
Window: animationstart event - Web APIs
Web › API › Window › animationstart event
bubbles yes cancelable no interface animationevent event handler property onanimationstart the original target for this event is the element that had the animation applied.
...for full details on this event please see the page on htmlelement: animationstart.
Window: blur event - Web APIs
Web › API › Window › blur event
the blur event fires when an element has lost focus.
...click outside the document to lose focus.'; } const log = document.getelementbyid('log'); window.addeventlistener('blur', pause); window.addeventlistener('focus', play); result specifications specification status comment ui events working draft added info that this event is composed.
Window: copy event - Web APIs
Web › API › Window › copy event
bubbles yes cancelable yes interface clipboardevent event handler property oncopy the original target for this event is the element that was the intended target of the copy action.
...for full details on this event please see the page on the element: copy event.
Window: cut event - Web APIs
Web › API › Window › cut event
bubbles yes cancelable yes interface clipboardevent event handler property oncut the original target for this event is the element that was the intended target of the cut action.
...for full details on this event please see the page on the element: cut event.
Window.devicePixelRatio - Web APIs
Web › API › Window › devicePixelRatio
html <canvas id="canvas"></canvas> javascript var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); // set display size (css pixels).
... the updatepixelratio() function fetches the current value of devicepixelratio, then sets the innertext of the element pixelratiobox to a string which displays the ratio both as a percentage and as a raw decimal value with up to two decimal places.
Window: focus event - Web APIs
Web › API › Window › focus event
the focus event fires when an element has received focus.
...click outside the document to lose focus.'; } const log = document.getelementbyid('log'); window.addeventlistener('blur', pause); window.addeventlistener('focus', play); result specifications specification status comment ui events working draft added info that this event is composed.
Window.open() - Web APIs
Web › API › Window › open
this name can be used as the target for the target attribute of <a> or <form> elements.
...firefox (51.) gets the handle but cannot run any element.focus() while chrome can run focus() from opener to child but not between siblings nor, reverse, from child to opener.
Window: paste event - Web APIs
Web › API › Window › paste event
bubbles yes cancelable yes interface clipboardevent event handler property onpaste the original target for this event is the element that was the intended target of the paste action.
...for full details on this event please see the page on the element: paste event.
Window.scrollX - Web APIs
Web › API › Window › scrollX
window.pagexoffset : (document.documentelement || document.body.parentnode || document.body).scrollleft; var y = (window.pageyoffset !== undefined) ?
... window.pageyoffset : (document.documentelement || document.body.parentnode || document.body).scrolltop; specification specification status comment css object model (cssom) view modulethe definition of 'window.scrollx' in that specification.
Window.scrollY - Web APIs
Web › API › Window › scrollY
document.documentelement.scrollleft : document.body.scrollleft; var y = supportpageoffset ?
...document.documentelement.scrolltop : document.body.scrolltop; specification specification status comment css object model (cssom) view modulethe definition of 'window.scrolly' in that specification.
Window.speechSynthesis - Web APIs
Web › API › Window › speechSynthesis
inside the inputform.onsubmit handler, we stop the form submitting with preventdefault(), create a new speechsynthesisutterance instance containing the text from the text <input>, set the utterance's voice to the voice selected in the <select> element, and start the utterance speaking via the speechsynthesis.speak() method.
... var synth = window.speechsynthesis; var inputform = document.queryselector('form'); var inputtxt = document.queryselector('input'); var voiceselect = document.queryselector('select'); function populatevoicelist() { voices = synth.getvoices(); for(i = 0; i < voices.length ; i++) { var option = document.createelement('option'); option.textcontent = voices[i].name + ' (' + voices[i].lang + ')'; if(voices[i].default) { option.textcontent += ' -- default'; } option.setattribute('data-lang', voices[i].lang); option.setattribute('data-name', voices[i].name); voiceselect.appendchild(option); } } populatevoicelist(); if (speechsynthesis.onvoiceschanged !== undefined) { speechsynthesis.onvoiceschanged = populatevoicelist; } inputform.onsubmit = function(e...
Window: transitioncancel event - Web APIs
Web › API › Window › transitioncancel event
bubbles yes cancelable no interface transitionevent event handler property globaleventhandlers.ontransitioncancel the original target for this event is the element that had the transition applied.
...for full details on this event please see the page on htmlelement: transitioncancel.
Window: transitionend event - Web APIs
Web › API › Window › transitionend event
the original target for this event is the element that had the transition applied.
...for full details on this event please see the page on htmlelement: transitionend.
Window: transitionrun event - Web APIs
Web › API › Window › transitionrun event
bubbles yes cancelable no interface transitionevent event handler property ontransitionrun the original target for this event is the element that had the transition applied.
...for full details on this event please see the page on htmlelement: transitionrun.
Window: transitionstart event - Web APIs
Web › API › Window › transitionstart event
bubbles yes cancelable no interface transitionevent event handler property globaleventhandlers.ontransitionstart the original target for this event is the element that had the transition applied.
...for full details on this event please see the page on htmlelement: transitionstart.
self.createImageBitmap() - Web APIs
Web › API › WindowOrWorkerGlobalScope › createImageBitmap
syntax const imagebitmappromise = createimagebitmap(image[, options]); const imagebitmappromise = createimagebitmap(image, sx, sy, sw, sh[, options]); parameters image an image source, which can be an <img>, svg <image>, <video>, <canvas>, htmlimageelement, svgimageelement, htmlvideoelement, htmlcanvaselement, blob, imagedata, imagebitmap, or offscreencanvas object.
... var canvas = document.getelementbyid('mycanvas'), ctx = canvas.getcontext('2d'), image = new image(); // wait for the sprite sheet to load image.onload = function() { promise.all([ // cut out two sprites from the sprite sheet createimagebitmap(image, 0, 0, 32, 32), createimagebitmap(image, 32, 0, 32, 32) ]).then(function(sprites) { // draw each sprite onto the canvas ctx.drawimage(sprites[0], 0, 0); ...
HTML in XMLHttpRequest - Web APIs
Web › API › XMLHttpRequest › HTML in XMLHttpRequest
failing that, if there is a <meta> element that declares the encoding within the first 1024 bytes of the file, that encoding is used.
...for older browsers, you can even use the xmlhttprequest.responsetext property in association with regular expressions in order to get, for example, the source code of an html element given its id: function gethtml (oxhr, stargetid) { var ropen = new regexp("<(?!\!)\\s*([^\\s>]+)[^>]*\\s+id\\=[\"\']" + stargetid + "[\"\'][^>]*>" ,"i"), ssrc = oxhr.responsetext, aexec = ropen.exec(ssrc); return aexec ?
XSLTProcessor - Web APIs
Web › API › XSLTProcessor
if the given node is a document node, you can pass in a full xsl transform or a literal result element transform; otherwise, it must be an <xsl:stylesheet> or <xsl:transform> element.
... the resultant object depends on the output method of the stylesheet: output method result type html htmldocument xml xmldocument text xmldocument with a single root element <transformiix:result> with the text as a child [throws] void xsltprocessor.setparameter(string namespaceuri, string localname, any value) sets a parameter in the xslt stylesheet that was imported.
Using the alertdialog role - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the alertdialog role
possible effects on user agents and assistive technology when the alertdialog role is used, the user agent should do the following: expose the element as a dialog in the operating system's accessibility api.
... when the alert dialog is correctly labeled and focus is moved to a control inside the dialog, screen readers should announce the dialog's accessible role, name and optionally description before announcing the focused element.
Using the aria-required attribute - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the aria-required attribute
description the aria-required attribute is used to indicate that user input is required on an element before a form can be submitted.
... this attribute can be used with any typical html form element; it is not limited to elements that have an aria role assigned.
Using the aria-valuenow attribute - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the aria-valuenow attribute
value string representation of a number possible effects on user agents and assistive technology for elements with role progressbar and scrollbar, assistive technologies should render the actual value as a percentage, calculated as a position on the range from aria-valuemin to aria-valuemax if both are defined, otherwise the actual value with a percent indicator.
... for elements with role slider and spinbutton, assistive technologies should render the actual value to users.
Using the progressbar role - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the progressbar role
the progressbar role should be used for an element that displays the progress status for a task that take a long time or consists of several steps.
... note: elements with the role progressbar have an implicit aria-readonly value of true.
Using the status role - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the status role
when the role is added to an element, the browser will send out an accessible status event to assistive technology products which can then notify the user about it.
... possible effects on user agents and assistive technology when the status role is added to an element, or such an element becomes visible, the user agent should do the following: expose the element as having a status role in the operating system's accessibility api.
Using ARIA: Roles, states, and properties - Accessibility
Web › Accessibility › ARIA › ARIA Techniques
aria defines semantics that can be applied to elements, with these divided into roles (defining a type of user interface element) and states and properties that are supported by a role.
... authors must assign an aria role and the appropriate states and properties to an element during its life-cycle, unless the element already has appropriate aria semantics (via use of an appropriate html element).
ARIA: tabpanel role - Accessibility
Web › Accessibility › ARIA › Roles › ARIA: tabpanel role
the aria tabpanel role indicates description an element with the tabpanel role associated roles and attributes aria- keyboard interaction key action tab → ← delete required javascript features include note about semantic alternatives to using this role or attribute.
... the first rule of aria use is you can use a native feature with the semantics and behavior you require already built in, instead of re-purposing an element and adding an aria role, state or property to make it accessible, then do so.
Multipart labels: Using ARIA for labels with embedded fields inside them - Accessibility
Web › Accessibility › ARIA › forms › Multipart labels
its parameter is a string that consists of the ids of the html elements you want to concatenate into a single accessible name.
... both aria-labelledby and aria-describedby are specified on the form element that is to be labelled, for example an <input> in both cases, the label for/label control bindings that may also exist are overridden by aria-labelledby.
Custom properties (--*): CSS variables - CSS: Cascading Style Sheets
Web › CSS › --*
custom properties are scoped to the element(s) they are declared on, and participate in the cascade: the value of such a custom property is that from the declaration decided by the cascading algorithm.
... initial valuesee proseapplies toall elementsinheritedyescomputed valueas specified with variables substitutedanimation typediscrete syntax --somekeyword: left; --somecolor: #0000ff; --somecomplexvalue: 3px 6px rgb(20, 32, 54); <declaration-value> this value matches any sequence of one or more tokens, so long as the sequence does not contain an unallowed token.
-moz-float-edge - CSS: Cascading Style Sheets
Web › CSS › -moz-float-edge
the non-standard -moz-float-edge css property specifies whether the height and width properties of the element include the margin, border, or padding thickness.
... formal definition initial valuecontent-boxapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax border-box | content-box | margin-box | padding-box examples html <div class="box"> <p>lorem ipsum dolor sit amet, consectetur adipiscing elit.</p> </div> css .box { display: block; height: 5px; margin: 0.5em auto 0.5em auto; color: gray; -moz-float-edge: margin-box; box-sizing: border-box; } result ...
-webkit-line-clamp - CSS: Cascading Style Sheets
Web › CSS › -webkit-line-clamp
when applied to anchor elements, the truncating can happen in the middle of the text, not necessarily at the end.
... formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typeby computed value type formal syntax none | <integer> examples truncating a paragraph html <p> in this example the <code>-webkit-line-clamp</code> property is set to <code>3</code>, which means the text is clamped after three lines.
-webkit-mask-attachment - CSS: Cascading Style Sheets
Web › CSS › -webkit-mask-attachment
fixed if fixed is specified, the mask image does not scroll with its containing element, instead remaining stationary within the viewport.
... formal definition initial valuescrollapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <attachment>#where <attachment> = scroll | fixed | local examples fixing a mask image to the viewport body { -webkit-mask-image: url('images/mask.png'); -webkit-mask-attachment: fixed; } specifications not part of any standard.
-webkit-mask-box-image - CSS: Cascading Style Sheets
Web › CSS › -webkit-mask-box-image
-webkit-mask-box-image sets the mask image for an element's border box.
... initial value: none applies to: all elements inherited: no media: visual computed value: as specified syntax -webkit-mask-box-image: <mask-box-image> [<top> <right> <bottom> <left> <x-repeat> <y-repeat>] where: <mask-box-image> <uri> | <gradient> | none <top> <right> <bottom> <left> <length> | <percentage> <x-repeat> <y-repeat> repeat | stretch | round | space values <uri> the location of the image resource to be used as a mask image.
-webkit-mask-composite - CSS: Cascading Style Sheets
Web › CSS › -webkit-mask-composite
the -webkit-mask-composite property specifies the manner in which multiple mask images applied to the same element are composited with one another.
... formal definition initial valuesource-overapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <composite-style>#where <composite-style> = clear | copy | source-over | source-in | source-out | source-atop | destination-over | destination-in | destination-out | destination-atop | xor examples compositing with xor .example { -webkit-mask-image: url(mask1.png), url('mask2.png'); -webkit-mask-composite: xor, sou...
-webkit-mask-position-x - CSS: Cascading Style Sheets
Web › CSS › -webkit-mask-position-x
; /* <percentage> values */ -webkit-mask-position-x: 100%; -webkit-mask-position-x: -50%; /* <length> values */ -webkit-mask-position-x: 50px; -webkit-mask-position-x: -1cm; /* multiple values values */ -webkit-mask-position-x: 50px, 25%, -3em; /* global values */ -webkit-mask-position-x: inherit; -webkit-mask-position-x: initial; -webkit-mask-position-x: unset; initial value0%applies toall elementsinheritednopercentagesrefer to the size of the box itselfcomputed valuefor <length> the absolute value, otherwise a percentageanimation typediscrete syntax values <length-percentage> a length indicating the position of the left edge of the image relative to the box's left padding edge.
... formal definition initial value0%applies toall elementsinheritednopercentagesrefer to the size of the box itselfcomputed valuefor <length> the absolute value, otherwise a percentageanimation typediscrete formal syntax [ <length-percentage> | left | center | right ]#where <length-percentage> = <length> | <percentage> examples horizontally positioning a mask image .exampleone { -webkit-mask-image: url(mask.png); -webkit-mask-position-x: right;...
-webkit-mask-position-y - CSS: Cascading Style Sheets
Web › CSS › -webkit-mask-position-y
; /* <percentage> values */ -webkit-mask-position-y: 100%; -webkit-mask-position-y: -50%; /* <length> values */ -webkit-mask-position-y: 50px; -webkit-mask-position-y: -1cm; /* multiple values values */ -webkit-mask-position-y: 50px, 25%, -3em; /* global values */ -webkit-mask-position-y: inherit; -webkit-mask-position-y: initial; -webkit-mask-position-y: unset; initial value0%applies toall elementsinheritednopercentagesrefer to the size of the box itselfcomputed valuefor <length> the absolute value, otherwise a percentageanimation typediscrete syntax values <length-percentage> a length indicating the position of the top side of the image relative to the box's top padding edge.
... formal definition initial value0%applies toall elementsinheritednopercentagesrefer to the size of the box itselfcomputed valuefor <length> the absolute value, otherwise a percentageanimation typediscrete formal syntax [ <length-percentage> | top | center | bottom ]#where <length-percentage> = <length> | <percentage> examples vertically positioning a mask image .exampleone { -webkit-mask-image: url(mask.png); -webkit-mask-position-y: bottom; ...
-webkit-tap-highlight-color - CSS: Cascading Style Sheets
Web › CSS › -webkit-tap-highlight-color
the highlighting indicates to the user that their tap is being successfully recognized, and indicates which element they're tapping on.
... formal definition initial valueblackapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <color>where <color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>where <rgb()> = rgb( <percentage>{3} [ / <alpha-value> ]?
-webkit-text-fill-color - CSS: Cascading Style Sheets
Web › CSS › -webkit-text-fill-color
/* <color> values */ -webkit-text-fill-color: red; -webkit-text-fill-color: #000000; -webkit-text-fill-color: rgb(100, 200, 0); /* global values */ -webkit-text-fill-color: inherit; -webkit-text-fill-color: initial; -webkit-text-fill-color: unset; syntax values <color> the foreground fill color of the element's text content.
... formal definition initial valuecurrentcolorapplies toall elementsinheritedyescomputed valuecomputed coloranimation typea color formal syntax <color>where <color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>where <rgb()> = rgb( <percentage>{3} [ / <alpha-value> ]?
:-moz-only-whitespace - CSS: Cascading Style Sheets
Web › CSS › :-moz-only-whitespace
the :-moz-only-whitespace css pseudo-class matches elements that only contains text nodes that only contain whitespace.
... (this includes elements with empty text nodes and elements with no child nodes.) syntax syntax not found in db!
:-moz-suppressed - CSS: Cascading Style Sheets
Web › CSS › :-moz-suppressed
the :-moz-suppressed css pseudo-class is a mozilla extension that matches elements representing images that were suppressed because loading images from the specified site has been blocked.
... syntax :-moz-suppressed examples styling elements that have been blocked :-moz-suppressed { background: yellow; padding: 8px; } specifications not part of any standard.
:-moz-ui-invalid - CSS: Cascading Style Sheets
Web › CSS › :-moz-ui-invalid
the :-moz-ui-invalid css pseudo-class represents any validated form element whose value isn't valid based on their validation constraints, in certain circumstances.
... if the element is required, the preceding rules apply only if the user has changed the value or attempted to submit the form.
:-moz-ui-valid - CSS: Cascading Style Sheets
Web › CSS › :-moz-ui-valid
the :-moz-ui-valid css pseudo-class represents any validated form element whose value validates correctly based on its validation constraints.
... if the element is required, the preceding rules apply only if the user has changed the value or attempted to submit the form.
:-moz-user-disabled - CSS: Cascading Style Sheets
Web › CSS › :-moz-user-disabled
the :-moz-user-disabled css pseudo-class is a mozilla extension that matches elements representing images that were not loaded because images have been entirely disabled by the user's preferences.
... syntax :-moz-user-disabled examples styling user-disabled elements :-moz-user-disabled { background-color: lightgray; padding: 8px; } specifications not part of any standard.
::-webkit-file-upload-button - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-file-upload-button
the ::-webkit-file-upload-button css pseudo-element represents the button of an <input> of type="file".
... this pseudo-element is non-standard and only supported in webkit/blink compatible browsers like chrome, opera and safari (indicated by the -webkit prefix).
::-webkit-outer-spin-button - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-outer-spin-button
the ::-webkit-outer-spin-button css pseudo-element is used to style the outer part of the spinner button of number picker <input> elements.
... hiding the spinner this example uses input::-webkit-outer-spin-button to find <input> elements' spinner widgets and set their -webkit-appearance to none, thus hiding them.
::cue - CSS: Cascading Style Sheets
Web › CSS › ::cue
the ::cue css pseudo-element matches webvtt cues within a selected element.
... syntax ::cue | ::cue( <selector> ) permitted properties rules whose selectors include this element may only use the following css properties: background background-attachment background-clip background-color background-image background-origin background-position background-repeat background-size color font font-family font-size font-stretch font-style font-variant font-weight line-height opacity outline outline-color outline-style outline-width ruby-position text-com...
::grammar-error - CSS: Cascading Style Sheets
Web › CSS › ::grammar-error
the ::grammar-error css pseudo-element represents a text segment which the user agent has flagged as grammatically incorrect.
... html <p>my friends is coming to the party tonight.</p> css ::grammar-error { text-decoration: underline red; color: red; } result specifications specification status comment css pseudo-elements level 4the definition of '::grammar-error' in that specification.
::spelling-error - CSS: Cascading Style Sheets
Web › CSS › ::spelling-error
the ::spelling-error css pseudo-element represents a text segment which the user agent has flagged as incorrectly spelled.
... html <p contenteditable spellcheck="true">my friends are coegdfgfddffbgning to the party tonight.</p> css ::spelling-error { text-decoration: wavy red; } result specifications specification status comment css pseudo-elements level 4the definition of '::spelling-error' in that specification.
:default - CSS: Cascading Style Sheets
Web › CSS › :default
the :default css pseudo-class selects form elements that are the default in a group of related elements.
... what this selector matches is defined in html standard §4.16.3 pseudo-classes — it may match the <button>, <input type="checkbox">, <input type="radio">, and <option> elements: a default option element is the first one with the selected attribute, or the first enabled option in dom order.
:focus-within - CSS: Cascading Style Sheets
Web › CSS › :focus-within
the :focus-within css pseudo-class represents an element that has received focus or contains an element that has received focus.
... in other words, it represents an element that is itself matched by the :focus pseudo-class or has a descendant that is matched by :focus.
:invalid - CSS: Cascading Style Sheets
Web › CSS › :invalid
the :invalid css pseudo-class represents any <input> or other <form> element whose contents fail to validate.
... syntax :invalid examples this example presents a simple form that colors elements green when they validate and red when they don't.
:placeholder-shown - CSS: Cascading Style Sheets
Web › CSS › :placeholder-shown
the :placeholder-shown css pseudo-class represents any <input> or <textarea> element that is currently displaying placeholder text.
... /* selects any element with an active placeholder */ :placeholder-shown { border: 2px solid silver; } syntax :placeholder-shown examples basic example this example applies special font and border styles when the placeholder is shown.
:read-only - CSS: Cascading Style Sheets
Web › CSS › :read-only
the :read-only css pseudo-class represents an element (such as input or textarea) that is not editable by the user.
...d-only, input:read-only, textarea:read-only { border: 0; box-shadow: none; background-color: white; } textarea:-moz-read-write, textarea:read-write { box-shadow: inset 1px 1px 3px #ccc; border-radius: 5px; } you can find the full source code at readonly-confirmation.html; this renders like so: styling read-only non-form controls this selector doesn't just select <input>/<textarea> elements — it will select any element that cannot be edited by the user.
:read-write - CSS: Cascading Style Sheets
Web › CSS › :read-write
the :read-write css pseudo-class represents an element (such as input or textarea) that is editable by the user.
...-only, input:read-only, textarea:read-only { border: 0; box-shadow: none; background-color: white; } textarea:-moz-read-write, textarea:read-write { box-shadow: inset 1px 1px 3px #ccc; border-radius: 5px; } you can find the full source code at readonly-confirmation.html; this renders like so: styling read-write non-form controls this selector doesn't just select <input>/<textarea> elements — it will select any element that can be edited by the user, such as a <p> element with contenteditable set on it.
:state() - CSS: Cascading Style Sheets
Web › CSS › :state
the :state css pseudo-class represents any custom element with the specified custom state in elementinternals.states.
... custom-element:state(foo) { /* styles to apply when `custom-element` is in the `foo` state */ } syntax syntax not found in db!
additive-symbols - CSS: Cascading Style Sheets
Web › CSS › @counter-style › additive-symbols
formal definition related at-rule@counter-styleinitial valuen/acomputed valueas specified formal syntax [ <integer> && <symbol> ]#where <symbol> = <string> | <image> | <custom-ident>where <image> = <url> | <image()> | <image-set()> | <element()> | <paint()> | <cross-fade()> | <gradient>where <image()> = image( <image-tags>?
...)<image-set()> = image-set( <image-set-option># )<element()> = element( <id-selector> )<paint()> = paint( <ident>, <declaration-value>?
negative - CSS: Cascading Style Sheets
Web › CSS › @counter-style › negative
formal definition related at-rule@counter-styleinitial value"-" hyphen-minuscomputed valueas specified formal syntax <symbol> <symbol>?where <symbol> = <string> | <image> | <custom-ident>where <image> = <url> | <image()> | <image-set()> | <element()> | <paint()> | <cross-fade()> | <gradient>where <image()> = image( <image-tags>?
...)<image-set()> = image-set( <image-set-option># )<element()> = element( <id-selector> )<paint()> = paint( <ident>, <declaration-value>?
pad - CSS: Cascading Style Sheets
Web › CSS › @counter-style › pad
formal definition related at-rule@counter-styleinitial value0 ""computed valueas specified formal syntax <integer> && <symbol>where <symbol> = <string> | <image> | <custom-ident>where <image> = <url> | <image()> | <image-set()> | <element()> | <paint()> | <cross-fade()> | <gradient>where <image()> = image( <image-tags>?
...)<image-set()> = image-set( <image-set-option># )<element()> = element( <id-selector> )<paint()> = paint( <ident>, <declaration-value>?
prefix - CSS: Cascading Style Sheets
Web › CSS › @counter-style › prefix
formal definition related at-rule@counter-styleinitial value"" (the empty string)computed valueas specified formal syntax <symbol>where <symbol> = <string> | <image> | <custom-ident>where <image> = <url> | <image()> | <image-set()> | <element()> | <paint()> | <cross-fade()> | <gradient>where <image()> = image( <image-tags>?
...)<image-set()> = image-set( <image-set-option># )<element()> = element( <id-selector> )<paint()> = paint( <ident>, <declaration-value>?
suffix - CSS: Cascading Style Sheets
Web › CSS › @counter-style › suffix
" (full stop followed by a space)computed valueas specified formal syntax <symbol>where <symbol> = <string> | <image> | <custom-ident>where <image> = <url> | <image()> | <image-set()> | <element()> | <paint()> | <cross-fade()> | <gradient>where <image()> = image( <image-tags>?
...)<image-set()> = image-set( <image-set-option># )<element()> = element( <id-selector> )<paint()> = paint( <ident>, <declaration-value>?
symbols - CSS: Cascading Style Sheets
Web › CSS › @counter-style › symbols
formal definition related at-rule@counter-styleinitial valuen/acomputed valueas specified formal syntax <symbol>+where <symbol> = <string> | <image> | <custom-ident>where <image> = <url> | <image()> | <image-set()> | <element()> | <paint()> | <cross-fade()> | <gradient>where <image()> = image( <image-tags>?
...)<image-set()> = image-set( <image-set-option># )<element()> = element( <id-selector> )<paint()> = paint( <ident>, <declaration-value>?
src - CSS: Cascading Style Sheets
Web › CSS › @font-face › src
in the case of svg fonts, the url points to an element within a document containing svg font definitions.
... if the element reference is omitted, a reference to the first defined font is implied.
unicode-range - CSS: Cascading Style Sheets
Web › CSS › @font-face › unicode-range
formal definition related at-rule@font-faceinitial valueu+0-10ffffcomputed valueas specified formal syntax <unicode-range># examples using a different font for a single character in this example we create a simple html containing a single <div> element, including an ampersand, that we want to style with a different font.
...we could also have done this by wrapping the ampersand in a <span> and applying a different font just to that, but that is an extra element and rule set.
@keyframes - CSS: Cascading Style Sheets
Web › CSS › @keyframes
valid keyframe lists if a keyframe rule doesn't specify the start or end states of the animation (that is, 0%/from and 100%/to), browsers will use the element's existing styles for the start/end states.
... this can be used to animate an element from its initial state and back.
-ms-high-contrast - CSS: Cascading Style Sheets
Web › CSS › @media › -ms-high-contrast
buttonface: controls the color of a <button> element's text.
... the <a> element controls the color of links.
any-hover - CSS: Cascading Style Sheets
Web › CSS › @media › any-hover
the any-hover css media feature can be used to test whether any available input mechanism can hover over elements.
... hover one or more available input mechanisms can conveniently hover over elements.
aspect-ratio - CSS: Cascading Style Sheets
Web › CSS › @media › aspect-ratio
html <div id='inner'> watch this element as you resize your viewport's width and height.
...alue="165"> <label id="hf" for="w">height:165</label> <input id="h" name="h" type="range" min="100" max="250" step="5" value="165"> <iframe id="outer" src="data:text/html,<style> @media (min-aspect-ratio: 8/5) { div { background: %239af; } } @media (max-aspect-ratio: 3/2) { div { background: %239ff; } } @media (aspect-ratio: 1/1) { div { background: %23f9a; } }</style><div id='inner'> watch this element as you resize your viewport's width and height.</div>"> </iframe> css iframe{ display:block; } javascript outer.style.width=outer.style.height="165px" w.onchange=w.oninput=function(){ outer.style.width=w.value+"px" wf.textcontent="width:"+w.value } h.onchange=h.oninput=function(){ outer.style.height=h.value+"px" hf.textcontent="height:"+h.value } result specifications ...
hover - CSS: Cascading Style Sheets
Web › CSS › @media › hover
the hover css media feature can be used to test whether the user's primary input mechanism can hover over elements.
... hover the primary input mechanism can conveniently hover over elements.
@media - CSS: Cascading Style Sheets
Web › CSS › @media
name summary notes any-hover does any available input mechanism allow the user to hover over elements?
... height height of the viewport hover does the primary input mechanism allow the user to hover over elements?
@supports - CSS: Cascading Style Sheets
Web › CSS › @supports
<subclass-selector>* [ <pseudo-element-selector> <pseudo-class-selector>* ]* ]!<combinator> = '>' | '+' | '~' | [ '|' ]where <type-selector> = <wq-name> | <ns-prefix>?
... '*'<subclass-selector> = <id-selector> | <class-selector> | <attribute-selector> | <pseudo-class-selector><pseudo-element-selector> = ':' <pseudo-class-selector><pseudo-class-selector> = ':' <ident-token> | ':' <function-token> <any-value> ')'where <wq-name> = <ns-prefix>?
height - CSS: Cascading Style Sheets
Web › CSS › @viewport › height
if the height of the containing block is not specified explicitly (i.e., it depends on content height), and this element is not absolutely positioned, the percentage value is treated as 0.max-height: the percentage is calculated with respect to the height of the generated box's containing block.
... if the height of the containing block is not specified explicitly (i.e., it depends on content height), and this element is not absolutely positioned, the percentage value is treated as none.computed valueas each of the properties of the shorthand:min-height: the percentage as specified or the absolute lengthmax-height: the percentage as specified or the absolute length or none formal syntax <viewport-length>{1,2}where <viewport-length> = auto | <length-percentage>where <length-percentage> = <length> | <percentage> examples setting minimum and maximum height @viewport { height: 500px; } specifications specification status comment css device adaptationthe definition of '"height" descriptor' in that specification.
Adjacent sibling combinator - CSS: Cascading Style Sheets
Web › CSS › Adjacent sibling combinator
the adjacent sibling combinator (+) separates two selectors and matches the second element only if it immediately follows the first element, and both are children of the same parent element.
... /* paragraphs that come immediately after any image */ img + p { font-weight: bold; } syntax former_element + target_element { style properties } examples css li:first-of-type + li { color: red; } html <ul> <li>one</li> <li>two!</li> <li>three</li> </ul> result specifications specification status comment selectors level 4the definition of 'next-sibling combinator' in that specification.
CSS Box Alignment - CSS: Cascading Style Sheets
Web › CSS › CSS Box Alignment
the block axis is the axis along which blocks, such as paragraph elements, are laid out and it runs across the inline axis.
...for justify-self or align-self, or when setting these values as a group with justify-items or align-items, this will be the margin box of the element that this property is being used on.
CSS Basic Box Model - CSS: Cascading Style Sheets
Web › CSS › CSS Box Model
css basic box model is a module of css that defines the rectangular boxes—including their padding and margin—that are generated for elements and laid out according to the visual formatting model.
...this model defines how css lays out elements, including their content, padding, border, and margin areas.
Styling Columns - CSS: Cascading Style Sheets
Web › CSS › CSS Columns › Styling Columns
these properties are applied to the element which is the multicol container and therefore all columns will have the same rule.
...in the next guide we will take a look at making elements inside a container span across all columns.
CSS Multi-column Layout - CSS: Cascading Style Sheets
Web › CSS › CSS Columns
basic example in the following example the column-count property has been applied to the element with a class of container.
... spanning and balancing how to make elements span across all columns and controlling the way columns are filled.
Backwards Compatibility of Flexbox - CSS: Cascading Style Sheets
Web › CSS › CSS Flexible Box Layout › Backwards Compatibility of Flexbox
the specification defines what happens if you use other layout methods on an element which then becomes a flex item.
...css creates anonymous boxes to represent these items so that you do not need to wrap each item in a wrapper to represent the html table row, and a second one to represent the table element itself, you can’t see or style these anonymous boxes; they are there purely to fix up the tree.
Ordering Flex Items - CSS: Cascading Style Sheets
Web › CSS › CSS Flexible Box Layout › Ordering Flex Items
this allows authors to manipulate the visual presentation while leaving the source order intact for non-css uas and for linear models such as speech and sequential navigation.” - ordering and orientation if your items were links or some other element that the user could tab to, then the tabbing order would be the order that these items appear in the document source — not your visual order.
...the heading of the news item is the key thing to highlight and would be the element that a user might jump to if they were tabbing between headings to find content they wanted to read.
Flow Layout and Overflow - CSS: Cascading Style Sheets
Web › CSS › CSS Flow Layout › Flow Layout and Overflow
understanding how overflow behaves is important in dealing with any element with a constrained size in css.
... giving an element a fixed height and width, then adding significant content to the box, creates a basic overflow example: the content goes into the box.
CSS Generated Content - CSS: Cascading Style Sheets
Web › CSS › CSS Generated Content
css generated content is a module of css that defines how to add content to an element.
... generated content can be used to add content to anonymous replaced elements or replace the content of a dom node in very limited circumstances with a generated value.
Grid template areas - CSS: Cascading Style Sheets
Web › CSS › CSS Grid Layout › Grid Template Areas
@media (min-width: 700px) { .wrapper { grid-template-areas: "hd hd hd hd hd hd hd hd hd" "sd sd main main main main main ft ft"; } } <div class="wrapper"> <div class="header">header</div> <div class="sidebar">sidebar</div> <div class="content">content</div> <div class="footer">footer</div> </div> using grid-template-areas for ui elements many of the grid examples you will find online make the assumption that you will use grid for main page layout, however grid can be just as useful for small elements as those larger ones.
... using grid-template-areas can be especially nice as it is easy to see in the code what your element looks like.
Subgrid - CSS: Cascading Style Sheets
Web › CSS › CSS Grid Layout › Subgrid
the subgridded element doesn't inherit the line numbers of the parent grid.
... if you inspect this in the firefox grid inspector you can see how the line of the grid is in the correct place down the center of the gap, so when we set the gap to 0, it acts in a similar way to applying a negative margin to an element, giving the space from the gap back to the item.
CSS Grid Layout - CSS: Cascading Style Sheets
Web › CSS › CSS Grid Layout
like tables, grid layout enables an author to align elements into columns and rows.
...for example, a grid container's child elements could position themselves so they actually overlap and layer, similar to css positioned elements.
Stacking with floated blocks - CSS: Cascading Style Sheets
Web › CSS › CSS Positioning › Understanding z index › Stacking and float
floating blocks are placed between non-positioned blocks and positioned blocks: the background and borders of the root element descendant non-positioned blocks, in order of appearance in the html floating blocks descendant positioned elements, in order of appearance in the html actually, as you can see in the example below, the background and border of the non-positioned block (div #4) is completely unaffected by floating blocks, but the content is affected.
...this behavior can be shown with an added rule to the above list: the background and borders of the root element descendant non-positioned blocks, in order of appearance in the html floating blocks descendant non-positioned inline elements descendant positioned elements, in order of appearance in the html note: if an opacity value is applied to the non-positioned block (div #4), then something strange happens: the background and border of that block pops up above the floating blocks and the positioned blocks.
Stacking context example 2 - CSS: Cascading Style Sheets
Web › CSS › CSS Positioning › Understanding z index › Stacking context example 2
you can see that div #2 (z-index: 2) is above div #3 (z-index: 1), because they both belong to the same stacking context (the root one), so z-index values rule how elements are stacked.
...in the stacking context hierarchy, elements that do not create a stacking context are collapsed on their parent.
Stacking context example 3 - CSS: Cascading Style Sheets
Web › CSS › CSS Positioning › Understanding z index › Stacking context example 3
« css « understanding css z-index stacking context example 3 this last example shows problems that arise when mixing several positioned elements in a multi-level html hierarchy and when z-indexes are assigned using class selectors.
... the second-level menu is absolutely positioned inside the parent element.
CSS Shapes - CSS: Cascading Style Sheets
Web › CSS › CSS Shapes
for the level 1 specification, css shapes can be applied to floating elements.
... the specification defines a number of different ways to define a shape on a floated element, causing wrapping lines to wrap round the shape rather than following the rectangle of the element's box.
CSS Transforms - CSS: Cascading Style Sheets
Web › CSS › CSS Transforms
css transforms is a module of css that defines how elements styled with css can be transformed in two-dimensional or three-dimensional space.
... reference properties backface-visibility perspective perspective-origin rotate scale transform transform-box transform-origin transform-style translate data types <transform-function> guides using css transforms step-by-step tutorial about how to transform elements styled with css.
Class selectors - CSS: Cascading Style Sheets
Web › CSS › Class selectors
the css class selector matches elements based on the contents of their class attribute.
... /* all elements with class="spacious" */ .spacious { margin: 2em; } /* all <li> elements with class="spacious" */ li.spacious { margin: 2em; } /* all <li> elements with a class list that includes both "spacious" and "elegant" */ /* for example, class="elegant retro spacious" */ li.spacious.elegant { margin: 2em; } syntax .class_name { style properties } note that this is equivalent to the following attribute selector: [class~=class_name] { style properties } examples css .red { color: #f33; } .yellow-bg { background: #ffa; } .fancy { font-weight: bold; text-shadow: 4px 4px 3px #77f; } html <p class="red">this paragraph has red text.</p> <p class="red yellow-bg">this paragraph has red text and a yellow background.</p> <p class="red fancy">this paragraph has red text ...
General sibling combinator - CSS: Cascading Style Sheets
Web › CSS › General sibling combinator
the general sibling combinator (~) separates two selectors and matches the second element only if it follows the first element (though not necessarily immediately), and both are children of the same parent element.
... /* paragraphs that are siblings of and subsequent to any image */ img ~ p { color: red; } syntax former_element ~ target_element { style properties } examples css p ~ span { color: red; } html <span>this is not red.</span> <p>here is a paragraph.</p> <code>here is some code.</code> <span>and here is a red span!</span> <code>more code...</code> <span>and this is a red span!</span> result specifications specification status comment selectors level 4the definition of 'subsequent-sibling combinator' in that specification.
Split Navigation - CSS: Cascading Style Sheets
Web › CSS › Layout cookbook › Split Navigation
a navigation pattern where one or more elements are separated from the rest of the navigation items.
... requirements a common navigation pattern is to have one element pushed away from the others.
Selector list - CSS: Cascading Style Sheets
Web › CSS › Selector list
/* selects all matching elements */ span, div { border: red 2px solid; } to reduce the size of style sheets, one can group selectors in comma-separated lists.
... syntax element, element, element { style properties } examples single line grouping grouping selectors in a single line using a comma-separated lists.
align-items - CSS: Cascading Style Sheets
Web › CSS › align-items
formal definition initial valuenormalapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax normal | stretch | <baseline-position> | [ <overflow-position>?
...ption> <option value="safe end">safe end</option> <option value="unsafe end">unsafe end</option> <option value="safe self-end">safe self-end</option> <option value="unsafe self-end">unsafe self-end</option> <option value="safe flex-end">safe flex-end</option> <option value="unsafe flex-end">unsafe flex-end</option> </select> </div> javascript var values = document.getelementbyid('values'); var display = document.getelementbyid('display'); var container = document.getelementbyid('container'); values.addeventlistener('change', function (evt) { container.style.alignitems = evt.target.value; }); display.addeventlistener('change', function (evt) { container.classname = evt.target.value; }); result specifications specification status comment ...
animation-fill-mode - CSS: Cascading Style Sheets
Web › CSS › animation-fill-mode
the element will instead be displayed using any other css rules applied to it.
... formal definition initial valuenoneapplies toall elements, ::before and ::after pseudo-elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <single-animation-fill-mode>#where <single-animation-fill-mode> = none | forwards | backwards | both examples you can see the effect of animation-fill-mode in the following example.
animation-name - CSS: Cascading Style Sheets
Web › CSS › animation-name
the animation-name css property specifies the names of one or more @keyframes at-rules describing the animation or animations to apply to the element.
... formal definition initial valuenoneapplies toall elements, ::before and ::after pseudo-elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax [ none | <keyframes-name> ]#where <keyframes-name> = <custom-ident> | <string> examples see css animations for examples.
animation-timing-function - CSS: Cascading Style Sheets
Web › CSS › animation-timing-function
if no animation-timing-function is specified on a keyframe, the corresponding value of animation-timing-function from the element to which the animation is applied is used for that keyframe.
... formal definition initial valueeaseapplies toall elements, ::before and ::after pseudo-elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <timing-function>#where <timing-function> = linear | <cubic-bezier-timing-function> | <step-timing-function>where <cubic-bezier-timing-function> = ease | ease-in | ease-out | ease-in-out | cubic-bezier(<number <a href="/docs/css/value_definition_syntax#brackets" title="brackets: enclo...
aspect-ratio - CSS: Cascading Style Sheets
Web › CSS › aspect-ratio
syntax aspect-ratio: 1 / 1; /* global values */ aspect-ratio: inherit; aspect-ratio: initial; aspect-ratio: unset; values <auto> replaced elements with an intrinsic aspect ratio use that aspect ratio, otherwise the box has no preferred aspect ratio.
... formal definition initial valueautoapplies toall elements except inline boxes and internal ruby or table boxesinheritednocomputed valueas specifiedanimation typediscrete formal syntax auto | <ratio> examples mapping width and height to aspect-ratio firefox has added an internal aspect-ratio property (in version 69 onwards) that applies to replaced elements and other related elements that accept width and height attributes.
background-color - CSS: Cascading Style Sheets
Web › CSS › background-color
the background-color css property sets the background color of an element.
... webaim: color contrast checker mdn understanding wcag, guideline 1.4 explanations understanding success criterion 1.4.3 | w3c understanding wcag 2.0 formal definition initial valuetransparentapplies toall elements.
background-position-x - CSS: Cascading Style Sheets
Web › CSS › background-position-x
the value of this property is overridden by any declaration of the background or background-position shorthand properties applied to the element after it.
... formal definition initial valueleftapplies toall elementsinheritednopercentagesrefer to width of background positioning area minus height of background imagecomputed valuea list, each item consisting of: an offset given as a combination of an absolute length and a percentage, plus an origin keywordanimation typediscrete formal syntax [ center | [ [ left | right | x-start | x-end ]?
background-position-y - CSS: Cascading Style Sheets
Web › CSS › background-position-y
the value of this property is overridden by any declaration of the background or background-position shorthand properties applied to the element after it.
... formal definition initial valuetopapplies toall elementsinheritednopercentagesrefer to height of background positioning area minus height of background imagecomputed valuea list, each item consisting of: an offset given as a combination of an absolute length and a percentage, plus an origin keywordanimation typediscrete formal syntax [ center | [ [ top | bottom | y-start | y-end ]?
border-block-color - CSS: Cascading Style Sheets
Web › CSS › border-block-color
the border-block-color css property defines the color of the logical block borders of an element, which maps to a physical border color depending on the element's writing mode, directionality, and text orientation.
... formal definition initial valuecurrentcolorapplies toall elementsinheritednocomputed valuecomputed coloranimation typediscrete formal syntax <'border-top-color'>{1,2} examples border with vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 10px solid blue; border-block-color: red; } results specifi...
border-block-style - CSS: Cascading Style Sheets
Web › CSS › border-block-style
the border-block-style css property defines the style of the logical block borders of an element, which maps to a physical border style depending on the element's writing mode, directionality, and text orientation.
... formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <'border-top-style'> examples dashed border with vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 5px solid blue; border-block-style: dashed; } results speci...
border-block-width - CSS: Cascading Style Sheets
Web › CSS › border-block-width
the border-block-width css property defines the width of the logical block borders of an element, which maps to a physical border width depending on the element's writing mode, directionality, and text orientation.
... formal definition initial valuemediumapplies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueabsolute length; 0 if the border style is none or hiddenanimation typediscrete formal syntax <'border-top-width'> examples border width with vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: v...
border-block - CSS: Cascading Style Sheets
Web › CSS › border-block
the physical borders to which it maps depends on the element's writing mode, directionality, and text orientation.
... formal definition initial valueas each of the properties of the shorthand:border-top-width: mediumborder-top-style: noneborder-top-color: currentcolorapplies toall elementsinheritednocomputed valueas each of the properties of the shorthand:border-top-width: the absolute length or 0 if border-top-style is none or hiddenborder-top-style: as specifiedborder-top-color: computed coloranimation typediscrete formal syntax <'border-top-width'> | <'border-top-style'> | <'color'>where <color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | current...
border-bottom-color - CSS: Cascading Style Sheets
Web › CSS › border-bottom-color
the border-bottom-color css property sets the color of an element's bottom border.
... formal definition initial valuecurrentcolorapplies toall elements.
border-bottom-style - CSS: Cascading Style Sheets
Web › CSS › border-bottom-style
the border-bottom-style css property sets the line style of an element's bottom border.
... formal definition initial valuenoneapplies toall elements.
border-bottom - CSS: Cascading Style Sheets
Web › CSS › border-bottom
the border-bottom shorthand css property sets an element's bottom border.
... formal definition initial valueas each of the properties of the shorthand:border-bottom-width: mediumborder-bottom-style: noneborder-bottom-color: currentcolorapplies toall elements.
border-inline-color - CSS: Cascading Style Sheets
Web › CSS › border-inline-color
the border-inline-color css property defines the color of the logical inline borders of an element, which maps to a physical border color depending on the element's writing mode, directionality, and text orientation.
... formal definition initial valuecurrentcolorapplies toall elementsinheritednocomputed valuecomputed coloranimation typediscrete formal syntax <'border-top-color'>{1,2} examples border color with vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 10px solid blue; border-inline-color: red; } results ...
border-inline-style - CSS: Cascading Style Sheets
Web › CSS › border-inline-style
the border-inline-style css property defines the style of the logical inline borders of an element, which maps to a physical border style depending on the element's writing mode, directionality, and text orientation.
... formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <'border-top-style'> examples html content <div> <p class="exampletext">example text</p> </div> css content div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 5px solid blue; border-inline-style: dashed; } specifications specif...
border-inline-width - CSS: Cascading Style Sheets
Web › CSS › border-inline-width
the border-inline-width css property defines the width of the logical inline borders of an element, which maps to a physical border width depending on the element's writing mode, directionality, and text orientation.
... formal definition initial valuemediumapplies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueabsolute length; 0 if the border style is none or hiddenanimation typediscrete formal syntax <'border-top-width'> examples html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-lr; border: 1px solid b...
border-left-color - CSS: Cascading Style Sheets
Web › CSS › border-left-color
the border-left-color css property sets the color of an element's left border.
... formal definition initial valuecurrentcolorapplies toall elements.
border-left-style - CSS: Cascading Style Sheets
Web › CSS › border-left-style
the border-left-style css property sets the line style of an element's left border.
... formal definition initial valuenoneapplies toall elements.
border-left - CSS: Cascading Style Sheets
Web › CSS › border-left
the border-left shorthand css property set an element's left border.
... formal definition initial valueas each of the properties of the shorthand:border-left-width: mediumborder-left-style: noneborder-left-color: currentcolorapplies toall elements.
border-right-color - CSS: Cascading Style Sheets
Web › CSS › border-right-color
the border-right-color css property sets the color of an element's right border.
... formal definition initial valuecurrentcolorapplies toall elements.
border-right-style - CSS: Cascading Style Sheets
Web › CSS › border-right-style
the border-right-style css property sets the line style of an element's right border.
... formal definition initial valuenoneapplies toall elements.
border-right - CSS: Cascading Style Sheets
Web › CSS › border-right
the border-right shorthand css property sets the properties of an element's right border.
... formal definition initial valueas each of the properties of the shorthand:border-right-width: mediumborder-right-style: noneborder-right-color: currentcolorapplies toall elements.
border-top-color - CSS: Cascading Style Sheets
Web › CSS › border-top-color
the border-top-color css property sets the color of an element's top border.
... formal definition initial valuecurrentcolorapplies toall elements.
border-top - CSS: Cascading Style Sheets
Web › CSS › border-top
the border-top shorthand css property sets all the properties of an element's top border.
... formal definition initial valueas each of the properties of the shorthand:border-top-width: mediumborder-top-style: noneborder-top-color: currentcolorapplies toall elements.
border-width - CSS: Cascading Style Sheets
Web › CSS › border-width
the border-width shorthand css property sets the width of an element's border.
... formal definition initial valueas each of the properties of the shorthand:border-top-width: mediumborder-right-width: mediumborder-bottom-width: mediumborder-left-width: mediumapplies toall elements.
box-direction - CSS: Cascading Style Sheets
Web › CSS › box-direction
if the direction is set using the element's dir attribute, then the style is ignored.
... formal definition initial valuenormalapplies toelements with a css display value of box or inline-boxinheritednocomputed valueas specifiedanimation typediscrete formal syntax normal | reverse | inherit examples setting box direction .example { /* bottom-to-top layout */ -moz-box-direction: reverse; /* mozilla */ -webkit-box-direction: reverse; /* webkit */ box-direction: reverse; /* as specified */ } specifications not part of any standard.
column-fill - CSS: Cascading Style Sheets
Web › CSS › column-fill
the column-fill css property controls how an element's contents are balanced when broken into columns.
... formal definition initial valuebalanceapplies tomulticol elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax auto | balance | balance-all examples splitting text evenly across columns html <p class="content-box"> this is a bunch of text split into multiple columns.
column-gap (grid-column-gap) - CSS: Cascading Style Sheets
Web › CSS › column-gap
the column-gap css property sets the size of the gap (gutter) between an element's columns.
... formal definition initial valuenormalapplies tomulti-column elements, flex containers, grid containersinheritednopercentagesrefer to corresponding dimension of the content areacomputed valueas specified, with <length>s made absolute, and normal computing to zero except on multi-column elementsanimation typea length, percentage or calc(); formal syntax normal | <length-percentage>where <length-percentage> = <length> | <percentage> examples flex layout html <...
columns - CSS: Cascading Style Sheets
Web › CSS › columns
the columns css shorthand property sets the number of columns to use when drawing an element's contents, as well as those columns' widths.
... <'column-count'> the ideal number of columns into which the element's content should be flowed, defined as an <integer> or the keyword auto.
counter-reset - CSS: Cascading Style Sheets
Web › CSS › counter-reset
<integer> the value to reset the counter to on each occurrence of the element.
... formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax [ <custom-ident> <integer>?
cross-fade() - CSS: Cascading Style Sheets
Web › CSS › cross-fade
&& <image><cf-final-image> = <image> | <color>where <image> = <url> | <image()> | <image-set()> | <element()> | <paint()> | <cross-fade()> | <gradient><color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>where <image()> = image( <image-tags>?
...)<image-set()> = image-set( <image-set-option># )<element()> = element( <id-selector> )<paint()> = paint( <ident>, <declaration-value>?
cursor - CSS: Cascading Style Sheets
Web › CSS › cursor
the cursor css property sets the type of mouse cursor, if any, to show when the mouse pointer is over an element.
... formal definition initial valueautoapplies toall elementsinheritedyescomputed valueas specified, but with <url> values made absoluteanimation typediscrete formal syntax [ [ <url> [ <x> <y> ]?
<display-listitem> - CSS: Cascading Style Sheets
Web › CSS › display-listitem
the list-item keyword causes the element to generate a ::marker pseudo-element with the content specified by its list-style properties (for example a bullet point) together with a principal box of the specified type for its own contents.
... syntax a single value of list-item will cause the element to behave like a list item.
flex-basis - CSS: Cascading Style Sheets
Web › CSS › flex-basis
note: in case both flex-basis (other than auto) and width (or height in case of flex-direction: column) are set for an element, flex-basis has priority.
... formal definition initial valueautoapplies toflex items, including in-flow pseudo-elementsinheritednopercentagesrefer to the flex container's inner main sizecomputed valueas specified, but with relative lengths converted into absolute lengthsanimation typea length, percentage or calc(); formal syntax content | <'width'> examples setting flex item initial sizes html <ul class="container"> <li class="flex flex1">1: flex-basis test</li> <li class="flex flex2">2: flex-basis test...
flex - CSS: Cascading Style Sheets
Web › CSS › flex
formal definition initial valueas each of the properties of the shorthand:flex-grow: 0flex-shrink: 1flex-basis: autoapplies toflex items, including in-flow pseudo-elementsinheritednocomputed valueas each of the properties of the shorthand:flex-grow: as specifiedflex-shrink: as specifiedflex-basis: as specified, but with relative lengths converted into absolute lengthsanimation typeas each of the properties of the shorthand:flex-grow: a numberflex-shrink: a numberflex-basis: a length, percentage or calc(); formal syntax none | [ <'flex-grow'> <'flex-shrink'>?
... <'flex-basis'> ] examples setting flex: auto html <div id="flex-container"> <div class="flex-item" id="flex">flex box (click to toggle raw box)</div> <div class="raw-item" id="raw">raw box</div> </div> css #flex-container { display: flex; flex-direction: row; } #flex-container > .flex-item { flex: auto; } #flex-container > .raw-item { width: 5rem; } var flex = document.getelementbyid("flex"); var raw = document.getelementbyid("raw"); flex.addeventlistener("click", function() { raw.style.display = raw.style.display == "none" ?
font-family - CSS: Cascading Style Sheets
Web › CSS › font-family
the font-family css property specifies a prioritized list of one or more font family names and/or generic family names for the selected element.
...kletter 1911", sans-serif; the following declarations are invalid: font-family: goudy bookletter 1911, sans-serif; font-family: red/black, sans-serif; font-family: "lucida" grande, sans-serif; font-family: ahem!, sans-serif; font-family: test@foo, sans-serif; font-family: #pound, sans-serif; font-family: hawaii 5-0, sans-serif; formal definition initial valuedepends on user agentapplies toall elements.
font-kerning - CSS: Cascading Style Sheets
Web › CSS › font-kerning
formal definition initial valueautoapplies toall elements.
...ij</textarea> css div { font-size: 2rem; font-family: serif; } #nokern { font-kerning: none; } #kern { font-kerning: normal; } javascript let input = document.getelementbyid('input'); let kern = document.getelementbyid('kern'); let nokern = document.getelementbyid('nokern'); input.addeventlistener('keyup', function() { kern.textcontent = input.value; /* update content */ nokern.textcontent = input.value; }); kern.textcontent = input.value; /* initialize content */ nokern.textcontent = input.value; specifications specification status co...
font-variant-ligatures - CSS: Cascading Style Sheets
Web › CSS › font-variant-ligatures
the font-variant-ligatures css property controls which ligatures and contextual forms are used in textual content of the elements it applies to.
... formal definition initial valuenormalapplies toall elements.
font-variant-position - CSS: Cascading Style Sheets
Web › CSS › font-variant-position
these glyphs are typically used in <sub> and <sup> elements.
... formal definition initial valuenormalapplies toall elements.
gap (grid-gap) - CSS: Cascading Style Sheets
Web › CSS › gap
<percentage> is the width of the gutter separating the grid lines, relative to the dimension of the element.
... formal definition initial valueas each of the properties of the shorthand:row-gap: normalcolumn-gap: normalapplies tomulti-column elements, flex containers, grid containersinheritednocomputed valueas each of the properties of the shorthand:row-gap: as specified, with <length>s made absolute, and normal computing to zero except on multi-column elementscolumn-gap: as specified, with <length>s made absolute, and normal computing to zero except on multi-column elementsanimation typeas each of the properties of the shorthand:row-gap: a length, percentage or calc();column-gap: a length, percentage or calc(); formal syntax <'row-gap'> <'column-gap'>?
hyphens - CSS: Cascading Style Sheets
Web › CSS › hyphens
when the html <wbr> element leads to a line break, no hyphen is added.
... formal definition initial valuemanualapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax none | manual | auto examples specifying text hyphenation this example uses three classes, one for each possible configuration of the hyphens property.
image-rendering - CSS: Cascading Style Sheets
Web › CSS › image-rendering
the property applies to an element itself, to any images set in its other properties, and to its descendants.
... formal definition initial valueautoapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax auto | crisp-edges | pixelated examples setting image scaling algorithms in practical use, the pixelated and crisp-edges rules can be combined to provide some fallback for each other.
Initial value - CSS: Cascading Style Sheets
Web › CSS › initial value
the usage of the initial value depends on whether a property is inherited or not: for inherited properties, the initial value is used on the root element only, as long as no specified value is supplied.
... for non-inherited properties, the initial value is used on all elements, as long as no specified value is supplied.
inset-block-end - CSS: Cascading Style Sheets
Web › CSS › inset-block-end
the inset-block-end css property defines the logical block end offset of an element, which maps to a physical inset depending on the element's writing mode, directionality, and text orientation.
... formal definition initial valueautoapplies topositioned elementsinheritednopercentageslogical-height of containing blockcomputed valuesame as box offsets: top, right, bottom, left properties except that directions are logicalanimation typea length, percentage or calc(); formal syntax <'top'> examples setting block end offset html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120...
inset-block-start - CSS: Cascading Style Sheets
Web › CSS › inset-block-start
the inset-block-start css property defines the logical block start offset of an element, which maps to a physical inset depending on the element's writing mode, directionality, and text orientation.
... formal definition initial valueautoapplies topositioned elementsinheritednopercentageslogical-height of containing blockcomputed valuesame as box offsets: top, right, bottom, left properties except that directions are logicalanimation typea length, percentage or calc(); formal syntax <'top'> examples setting block start offset html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 1...
inset-block - CSS: Cascading Style Sheets
Web › CSS › inset-block
the inset-block css property defines the logical block start and end offsets of an element, which maps to physical offsets depending on the element's writing mode, directionality, and text orientation.
... formal definition initial valueautoapplies topositioned elementsinheritednopercentageslogical-height of containing blockcomputed valuesame as box offsets: top, right, bottom, left properties except that directions are logicalanimation typea length, percentage or calc(); formal syntax <'top'>{1,2} examples setting block start and end offsets html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120p...
inset-inline-end - CSS: Cascading Style Sheets
Web › CSS › inset-inline-end
the inset-inline-end css property defines the logical inline end inset of an element, which maps to a physical inset depending on the element's writing mode, directionality, and text orientation.
... formal definition initial valueautoapplies topositioned elementsinheritednopercentageslogical-width of containing blockcomputed valuesame as box offsets: top, right, bottom, left properties except that directions are logicalanimation typea length, percentage or calc(); formal syntax <'top'> examples setting inline end offset html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120p...
inset-inline-start - CSS: Cascading Style Sheets
Web › CSS › inset-inline-start
the inset-inline-start css property defines the logical inline start inset of an element, which maps to a physical offset depending on the element's writing mode, directionality, and text orientation.
... formal definition initial valueautoapplies topositioned elementsinheritednopercentageslogical-width of containing blockcomputed valuesame as box offsets: top, right, bottom, left properties except that directions are logicalanimation typea length, percentage or calc(); formal syntax <'top'> examples setting inline start offset html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 1...
inset-inline - CSS: Cascading Style Sheets
Web › CSS › inset-inline
the inset-inline css property defines the logical start and end offsets of an element in the inline direction, which maps to physical offsets depending on the element's writing mode, directionality, and text orientation.
... formal definition initial valueautoapplies topositioned elementsinheritednopercentageslogical-width of containing blockcomputed valuesame as box offsets: top, right, bottom, left properties except that directions are logicalanimation typea length, percentage or calc(); formal syntax <'top'>{1,2} examples setting inline start and end offsets html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120p...
inset - CSS: Cascading Style Sheets
Web › CSS › inset
the inset css property, though part of the logical specification, doesn't define logical block or inline offsets, and instead defines physical offsets, regardless of the element's writing mode, directionality, and text orientation.
...formal definition initial valueautoapplies topositioned elementsinheritednopercentageslogical-height of containing blockcomputed valuesame as box offsets: top, right, bottom, left properties except that directions are logicalanimation typea length, percentage or calc(); formal syntax <'top'>{1,4} examples setting offsets for an element html <div> <span class="exampletext">example text</span> </div> css div { background-color: yellow; width: 150...
justify-content - CSS: Cascading Style Sheets
Web › CSS › justify-content
the alignment is done after the lengths and auto margins are applied, meaning that, if in a flexbox layout there is at least one flexible element, with flex-grow different from 0, it will have no effect as there won't be any available space.
...>baseline</option> <option value="first baseline">first baseline</option> <option value="last baseline">last baseline</option> <option value="space-between" selected>space-between</option> <option value="space-around">space-around</option> <option value="space-evenly">space-evenly</option> <option value="stretch">stretch</option> </select> javascript var justifycontent = document.getelementbyid("justifycontent"); justifycontent.addeventlistener("change", function (evt) { document.getelementbyid("container").style.justifycontent = evt.target.value; }); result specifications specification status comment css box alignment module level 3the definition of 'justify-content' in that specification.
justify-items - CSS: Cascading Style Sheets
Web › CSS › justify-items
for absolutely-positioned elements, it aligns the items inside their containing block on the inline axis, accounting for the offset values of top, left, bottom, and right.
... formal definition initial valuelegacyapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax normal | stretch | <baseline-position> | <overflow-position>?
list-style-image - CSS: Cascading Style Sheets
Web › CSS › list-style-image
elements with display: list-item; by default this includes <li> elements.
... because this property is inherited, it can be set on the parent element (normally <ol> or <ul>) to let it apply to all list items.
margin-block-end - CSS: Cascading Style Sheets
Web › CSS › margin-block-end
the margin-block-end css property defines the logical block end margin of an element, which maps to a physical margin depending on the element's writing mode, directionality, and text orientation.
... it relates to margin-block-start, margin-inline-start, and margin-inline-end, which define the other margins of the element.
margin-block-start - CSS: Cascading Style Sheets
Web › CSS › margin-block-start
the margin-block-start css property defines the logical block start margin of an element, which maps to a physical margin depending on the element's writing mode, directionality, and text orientation.
... it relates to margin-block-end, margin-inline-start, and margin-inline-end, which define the other margins of the element.
margin-inline-end - CSS: Cascading Style Sheets
Web › CSS › margin-inline-end
the margin-inline-end css property defines the logical inline end margin of an element, which maps to a physical margin depending on the element's writing mode, directionality, and text orientation.
...inline-end: 1em; /* relative to the text size */ margin-inline-end: 5%; /* relative to the nearest block container's width */ /* keyword values */ margin-inline-end: auto; /* global values */ margin-inline-end: inherit; margin-inline-end: initial; margin-inline-end: unset; it relates to margin-block-start, margin-block-end, and margin-inline-start, which define the other margins of the element.
margin-inline-start - CSS: Cascading Style Sheets
Web › CSS › margin-inline-start
the margin-inline-start css property defines the logical inline start margin of an element, which maps to a physical margin depending on the element's writing mode, directionality, and text orientation.
...ine-start: 10px; /* an absolute length */ margin-inline-start: 1em; /* relative to the text size */ margin-inline-start: 5%; /* relative to the nearest block container's width */ /* keyword values */ margin-inline-start: auto; /* global values */ margin-inline-start: inherit; it relates to margin-block-start, margin-block-end, and margin-inline-end, which define the other margins of the element.
mask-border-repeat - CSS: Cascading Style Sheets
Web › CSS › mask-border-repeat
the mask-border-repeat css property sets how the edge regions of a source image are adjusted to fit the dimensions of an element's mask border.
... formal definition initial valuestretchapplies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax [ stretch | repeat | round | space ]{1,2} examples basic usage this property doesn't appear to be supported anywhere yet.
mask-border-width - CSS: Cascading Style Sheets
Web › CSS › mask-border-width
the mask-border-width css property sets the width of an element's mask border.
... formal definition initial valueautoapplies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednopercentagesrelative to width/height of the mask border image areacomputed valueas specified, but with relative lengths converted into absolute lengthsanimation typediscrete formal syntax [ <length-percentage> | <number> | auto ]{1,4}where <length-percentage> = <length> | <percentage> examp...
mask-composite - CSS: Cascading Style Sheets
Web › CSS › mask-composite
formal definition initial valueaddapplies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <compositing-operator>#where <compositing-operator> = add | subtract | intersect | exclude examples compositing mask layers with addition css #masked { width: 100px; height: 100px; background-color: #8cffa0; mask-ima...
...s.org/files/12676/star.svg); mask-size: 100% 100%; mask-composite: add; /* can be changed in the live sample */ } html <div id="masked"> </div> <select id="compositemode"> <option value="add">add</option> <option value="subtract">subtract</option> <option value="intersect">intersect</option> <option value="exclude">exclude</option> </select> javascript var clipbox = document.getelementbyid("compositemode"); clipbox.addeventlistener("change", function (evt) { document.getelementbyid("masked").style.maskcomposite = evt.target.value; }); result specifications specification status comment css masking module level 1the definition of 'mask-composite' in that specification.
mask-mode - CSS: Cascading Style Sheets
Web › CSS › mask-mode
formal definition initial valuematch-sourceapplies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <masking-mode>#where <masking-mode> = alpha | luminance | match-source examples using alpha mask mode css #masked { width: 227px; height: 200px; background: blue linear-gradient(red, blue); mask-image: url(https://mdn...
....mozillademos.org/files/12668/mdn.svg); mask-mode: alpha; /* can be changed in the live sample */ } html <div id="masked"> </div> <select id="maskmode"> <option value="alpha">alpha</option> <option value="luminance">luminance</option> <option value="match-source">match-source</option> </select> javascript var maskmode = document.getelementbyid("maskmode"); maskmode.addeventlistener("change", function (evt) { document.getelementbyid("masked").style.maskmode = evt.target.value; }); result specifications specification status comment css masking module level 1the definition of 'mask-mode' in that specification.
max-block-size - CSS: Cascading Style Sheets
Web › CSS › max-block-size
the max-block-size css property specifies the maximum size of an element in the direction opposite that of the writing direction as specified by writing-mode.
... auto the browser will calculate and select a max-width for the specified element.
offset-position - CSS: Cascading Style Sheets
Web › CSS › offset-position
a position defines an x/y coordinate, to place an item relative to the edges of an element's box.
... formal definition initial valueautoapplies totransformable elementsinheritednopercentagesrefertosizeofcontainingblockcomputed valuefor <length> the absolute value, otherwise a percentageanimation typea position formal syntax auto | <position>where <position> = [ [ left | center | right ] | [ top | center | bottom ] | [ left | center | right | <length-percentage> ] [ top | center | bottom | <length-percentage> ]?
overflow-x - CSS: Cascading Style Sheets
Web › CSS › overflow-x
the overflow-x css property sets what shows when content overflows a block-level element's left and right edges.
... clip like for hidden, the content is clipped to the element's padding box.
overflow-y - CSS: Cascading Style Sheets
Web › CSS › overflow-y
the overflow-y css property sets what shows when content overflows a block-level element's top and bottom edges.
... clip like for hidden, the content is clipped to the element's padding box.
padding-block - CSS: Cascading Style Sheets
Web › CSS › padding-block
the padding-block css shorthand property defines the logical block start and end padding of an element, which maps to physical padding properties depending on the element's writing mode, directionality, and text orientation.
... formal definition initial value0applies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueas <length>animation typediscrete formal syntax <'padding-left'>{1,2} examples setting block padding for vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-rl; padding-block: 20px 40...
padding-inline - CSS: Cascading Style Sheets
Web › CSS › padding-inline
the padding-inline css shorthand property defines the logical inline start and end padding of an element, which maps to physical padding properties depending on the element's writing mode, directionality, and text orientation.
... formal definition initial value0applies toall elementsinheritednopercentageslogical-width of containing blockcomputed valueas <length>animation typediscrete formal syntax <'padding-left'>{1,2} examples setting inline padding for vertical text html <div> <p class="exampletext">example text</p> </div> css div { background-color: yellow; width: 120px; height: 120px; } .exampletext { writing-mode: vertical-rl; padding-inline: 20px ...
paint-order - CSS: Cascading Style Sheets
Web › CSS › paint-order
marker-start) and <marker> element.
... formal definition initial valuenormalapplies totext elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax normal | [ fill | stroke | markers ] examples reversing the paint order of stroke and fill svg <svg xmlns="http://www.w3.org/2000/svg" width="400" height="200"> <text x="10" y="75">stroke in front</text> <text x="10" y="150" class="stroke-behind">stroke behind</text> </svg> css text { font-family: sans-serif; font-size: 50px; font-weight: bold; fill: black; stroke: ...
place-content - CSS: Cascading Style Sheets
Web › CSS › place-content
</option> <option value="start">start</option> <option value="end">end</option> <option value="flex-start">flex-start</option> <option value="flex-end">flex-end</option> <option value="left">left</option> <option value="right">right</option> <option value="safe">safe</option> <option value="unsafe">unsafe</option> </select><code>;</code> var update = function () { document.getelementbyid("container").style.placecontent = document.getelementbyid("aligncontentalignment").value + " " + document.getelementbyid("justifycontentalignment").value; } var aligncontentalignment = document.getelementbyid("aligncontentalignment"); aligncontentalignment.addeventlistener("change", update); var justifycontentalignment = document.getelementbyid("justifycontentalignment"); justifycontentali...
...gnment.addeventlistener("change", update); var writingm = document.getelementbyid("writingmode"); writingm.addeventlistener("change", function (evt) { document.getelementbyid("container").style.writingmode = evt.target.value; }); var direction = document.getelementbyid("direction"); direction.addeventlistener("change", function (evt) { document.getelementbyid("container").style.direction = evt.target.value; }); css #container { display: flex; height:240px; width: 240px; flex-wrap: wrap; background-color: #8c8c8c; writing-mode: horizontal-tb; /* can be changed in the live sample */ direction: ltr; /* can be changed in the live sample */ place-content: flex-end center; /* can be changed in the live sample */ } div > div { border: 2px solid #8c8c8c; width: 50px; bac...
place-items - CSS: Cascading Style Sheets
Web › CSS › place-items
formal definition initial valueas each of the properties of the shorthand:align-items: normaljustify-items: legacyapplies toall elementsinheritednocomputed valueas each of the properties of the shorthand:align-items: as specifiedjustify-items: as specifiedanimation typediscrete formal syntax <'align-items'> <'justify-items'>?
..."left auto">left auto</option> <option value="right normal">right normal</option> <option value="baseline normal">baseline normal</option> <option value="first baseline auto">first baseline auto</option> <option value="last baseline normal">last baseline normal</option> <option value="stretch auto">stretch auto</option> </select> </div> javascript var values = document.getelementbyid('values'); var display = document.getelementbyid('display'); var container = document.getelementbyid('container'); values.addeventlistener('change', function (evt) { container.style.placeitems = evt.target.value; }); display.addeventlistener('change', function (evt) { container.classname = evt.target.value; }); css #container { height:200px; width: 240px; place-items: center; ...
quotes - CSS: Cascading Style Sheets
Web › CSS › quotes
auto appropriate quote marks will be used for whatever language value is set on the selected elements (i.e.
... formal definition initial valuedepends on user agentapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax none | auto | [ <string> <string> ]+ examples basic quote marks html <q>to be or not to be.
ruby-position - CSS: Cascading Style Sheets
Web › CSS › ruby-position
the ruby-position css property defines the position of a ruby element relatives to its base element.
... it can be position over the element (over), under it (under), or between the characters, on their right side (inter-character).
scale - CSS: Cascading Style Sheets
Web › CSS › scale
syntax /* keyword values */ scale: none; /* single values */ /* values of more than 1 make the element grow */ scale: 2; /* values of less than 1 make the element shrink */ scale: 0.5; /* two values */ scale: 2 0.5; /* three values */ scale: 2 0.5 2; values single number value a <number> specifying a scale factor to make the affected element scale by the same factor along both the x and y axes.
... formal definition initial valuenoneapplies totransformable elementsinheritednocomputed valueas specifiedanimation typea transformcreates stacking contextyes formal syntax none | <number>{1,3} examples scaling an element on hover html <div> <p class="scale">scaling</p> </div> css * { box-sizing: border-box; } html { font-family: sans-serif; } div { width: 150px; margin: 0 auto; } p { padding: 10px 5px; border: 3px solid black; border-ra...
scroll-behavior - CSS: Cascading Style Sheets
Web › CSS › scroll-behavior
when this property is specified on the root element, it applies to the viewport instead.
... this property specified on the body element will not propagate to the viewport.
scroll-margin-block - CSS: Cascading Style Sheets
Web › CSS › scroll-margin-block
the scroll-margin-block shorthand property sets the scroll margins of an element in the block dimension.
... formal definition initial value0applies toall elementsinheritednocomputed valueas specifiedanimation typeby computed value type formal syntax <length>{1,2} specifications specification status comment css scroll snap module level 1the definition of 'scroll-margin-block' in that specification.
scroll-padding-block - CSS: Cascading Style Sheets
Web › CSS › scroll-padding-block
the scroll-padding-block shorthand property sets the scroll padding of an element in the block dimension.
...this allows the author to exclude regions of the scrollport that are obscured by other content (such as fixed-positioned toolbars or sidebars) or simply to put more breathing room between a targeted element and the edges of the scrollport.
scroll-padding-inline - CSS: Cascading Style Sheets
Web › CSS › scroll-padding-inline
the scroll-padding-inline shorthand property sets the scroll padding of an element in the inline dimension.
...this allows the author to exclude regions of the scrollport that are obscured by other content (such as fixed-positioned toolbars or sidebars) or simply to put more breathing room between a targetted element and the edges of the scrollport.
scroll-padding - CSS: Cascading Style Sheets
Web › CSS › scroll-padding
the scroll-padding shorthand property sets scroll padding on all sides of an element at once, much like the padding property does for padding on an element.
...this allows the author to exclude regions of the scrollport that are obscured by other content (such as fixed-positioned toolbars or sidebars), or simply to put more breathing room between a targeted element and the edges of the scrollport.
scroll-snap-type - CSS: Cascading Style Sheets
Web › CSS › scroll-snap-type
both the scroll container snaps to snap positions in both of its axes independently (potentially snapping to different elements in each axis).
... formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax none | [ x | y | block | inline | both ] [ mandatory | proximity ]?
shape-margin - CSS: Cascading Style Sheets
Web › CSS › shape-margin
the margin lets you adjust the distance between the edges of the shape (the float element) and the surrounding content.
... syntax /* <length> values */ shape-margin: 10px; shape-margin: 20mm; /* <percentage> value */ shape-margin: 60%; /* global values */ shape-margin: inherit; shape-margin: initial; shape-margin: unset; values <length-percentage> sets the margin of the shape to a <length> value or to a <percentage> of the width of the element's containing block.
Specified value - CSS: Cascading Style Sheets
Web › CSS › specified value
if the document's style sheet doesn't specify a value but it is an inherited property, the value will be taken from the parent element.
... if none of the above pertain, the element's initial value will be used.
table-layout - CSS: Cascading Style Sheets
Web › CSS › table-layout
fixed table and column widths are set by the widths of table and col elements or by the width of the first row of cells.
... formal definition initial valueautoapplies totable and inline-table elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax auto | fixed examples fixed-width tables with text-overflow this example uses a fixed table layout, combined with the width property, to restrict the table's width.
text-decoration-color - CSS: Cascading Style Sheets
Web › CSS › text-decoration-color
this effect can nevertheless be achieved by nesting elements, applying a different line type to each element (with the text-decoration-line property), and specifying the line color (with text-decoration-color) on a per-element basis.
... webaim: color contrast checker mdn understanding wcag, guideline 1.4 explanations understanding success criterion 1.4.3 | w3c understanding wcag 2.0 formal definition initial valuecurrentcolorapplies toall elements.
text-decoration-line - CSS: Cascading Style Sheets
Web › CSS › text-decoration-line
the text-decoration-line css property sets the kind of decoration that is used on text in an element, such as an underline or overline.
... formal definition initial valuenoneapplies toall elements.
text-emphasis-position - CSS: Cascading Style Sheets
Web › CSS › text-emphasis-position
formal definition initial valueover rightapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax [ over | under ] && [ right | left ] examples preferring ruby over emphasis marks some editors prefer to hide emphasis marks when they conflict with ruby.
...in html, this can be done with the following pattern: em { text-emphasis: dot; /* set text-emphasis for <em> elements */ } em rt { display: none; /* hide ruby inside <em> elements */ } specifications specification status comment css text decoration module level 3the definition of 'text-emphasis' in that specification.
text-emphasis - CSS: Cascading Style Sheets
Web › CSS › text-emphasis
the text-decoration property does not inherit, and the decoration specified is applied across the whole element.
... formal definition initial valueas each of the properties of the shorthand:text-emphasis-style: nonetext-emphasis-color: currentcolorapplies toall elementsinheritednocomputed valueas each of the properties of the shorthand:text-emphasis-style: as specifiedtext-emphasis-color: computed coloranimation typeas each of the properties of the shorthand:text-emphasis-color: a colortext-emphasis-style: discrete formal syntax <'text-emphasis-style'> | <'text-emphasis-color'> examples a heading with emphasis shape and color this example draws a heading ...
text-orientation - CSS: Cascading Style Sheets
Web › CSS › text-orientation
use-glyph-orientation on svg elements, this keyword leads to use the value of the deprecated svg properties glyph-orientation-vertical and glyph-orientation-horizontal.
... formal definition initial valuemixedapplies toall elements, except table row groups, rows, column groups, and columnsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax mixed | upright | sideways examples html <p>lorem ipsum dolet semper quisquam.</p> css p { writing-mode: vertical-rl; text-orientation: upright; } result specifications specification status comment css writing modes module level 3the definition of 'text-orientation' in that specification.
text-overflow - CSS: Cascading Style Sheets
Web › CSS › text-overflow
for example: overflow: hidden; white-space: nowrap; the text-overflow property only affects content that is overflowing a block container element in its inline progression direction (not text overflowing at the bottom of a box, for example).
... formal definition initial valueclipapplies toblock container elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax [ clip | ellipsis | <string> ]{1,2} examples css p { width: 200px; border: 1px solid; padding: 2px 5px; /* both of the following are required for text-overflow */ white-space: nowrap; overflow: hidden; } .overflow-visible { white-space: initial; } .overflow-clip { text-overflow: clip; } .overflow-e...
text-size-adjust - CSS: Cascading Style Sheets
Web › CSS › text-size-adjust
when an element containing text uses 100% of the screen's width, the algorithm increases its text size, but without modifying the layout.
... formal definition initial valueauto for smartphone browsers supporting inflation, none in other cases (and then not modifiable).applies toall elementsinheritedyespercentagesyes, refer to the corresponding size of the text fontcomputed valueas specifiedanimation typediscrete formal syntax none | auto | <percentage> examples basic disabling usage as hinted at above, on a properly designed responsive site the text-size-adjust behavior is not needed, so developers can elect to turn it off by specifying a vlaue of none: p { -webkit-text-siz...
transform-box - CSS: Cascading Style Sheets
Web › CSS › transform-box
if a viewbox attribute is specified for the svg viewport creating element, the reference box is positioned at the origin of the coordinate system established by the viewbox attribute, and the dimension of the reference box is set to the width and height values of the viewbox attribute.
... formal definition initial valueview-boxapplies totransformable elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax content-box | border-box | fill-box | stroke-box | view-box examples svg transform-origin scoping in this example we have an svg: <svg id="svg" xmlns="http://www.w3.org/2000/svg" viewbox="0 0 50 50"> <g> <circle id="center" fill="red" r="1" transform="translate(25 25)" /> <circle id="boxcenter" fill="blue" r=".5" transform="translate(15 15)" /> <rect id="box" x="10" y="10" width="10" height="10" rx="1" ry="1" stroke="black" fill="none" /> </g> </svg> in the css we have an animation that uses a transform to rotate the rectangle infinitely.
matrix3d() - CSS: Cascading Style Sheets
Web › CSS › transform-function › matrix3d
a1a2a3a4b1b2b3b4c1c2c3c4d1d2d3d4 examples cube squashing example the following example shows a 3d cube created from dom elements and transforms, which can be hovered/focused to apply a matrix3d() transform to it.
... html <section id="example-element" tabindex="0"> <div class="face front">1</div> <div class="face back">2</div> <div class="face right">3</div> <div class="face left">4</div> <div class="face top">5</div> <div class="face bottom">6</div> </section> css #example-element { width: 100px; height: 100px; transform-style: preserve-3d; transition: transform 1.5s; transform: rotate3d(1, 1, 1, 30deg); margin: 50px auto; } #example-element:hover, #example-element:focus { transform: rotate3d(1, 1, 1, 30deg) matrix3d(1,0,0,0,0,1,6,0,0,0,1,0,50,100,0,1.1); } .face { display: flex; align-items: center; justify-content: center; width: 100%; height: 100%; position: absolute; backface-visibility: inherit; font-size: 60px; color: #fff; } .front { background:...
perspective() - CSS: Cascading Style Sheets
Web › CSS › transform-function › perspective
the perspective() transform function is part of the transform value applied on the element being transformed.
...a positive value makes the element appear closer to the user than the rest of the interface, a negative value farther.
translate() - CSS: Cascading Style Sheets
Web › CSS › transform-function › translate
the translate() css function repositions an element in the horizontal and/or vertical directions.
...its coordinates define how much the element moves in each direction.
translate3d() - CSS: Cascading Style Sheets
Web › CSS › transform-function › translate3d
the translate3d() css function repositions an element in 3d space.
...its coordinates define how much the element moves in each direction.
transition - CSS: Cascading Style Sheets
Web › CSS › transition
transitions enable you to define the transition between two states of an element.
... formal definition initial valueas each of the properties of the shorthand:transition-delay: 0stransition-duration: 0stransition-property: alltransition-timing-function: easeapplies toall elements, ::before and ::after pseudo-elementsinheritednocomputed valueas each of the properties of the shorthand:transition-delay: as specifiedtransition-duration: as specifiedtransition-property: as specifiedtransition-timing-function: as specifiedanimation typediscrete formal syntax <single-transition>#where <single-transition> = [ none | <single-transition-property> ] | <time> | <timing-function> |...
translate - CSS: Cascading Style Sheets
Web › CSS › translate
formal definition initial valuenoneapplies totransformable elementsinheritednopercentagesrefer to the size of bounding boxcomputed valueas specified, but with relative lengths converted into absolute lengthsanimation typea transformcreates stacking contextyes formal syntax none | <length-percentage> [ <length-percentage> <length>?
... initial valuenoneapplies totransformable elementsinheritednopercentagesrefer to the size of bounding boxcomputed valueas specified, but with relative lengths converted into absolute lengthsanimation typea transformcreates stacking contextyes ...
Used value - CSS: Cascading Style Sheets
Web › CSS › used value
example this example computes and displays the used width value of three elements (updates on resize): html <div id="no-width"> <p>no explicit width.</p> <p class="show-used-width">..</p> <div id="width-50"> <p>explicit width: 50%.</p> <p class="show-used-width">..</p> <div id="width-inherit"> <p>explicit width: inherit.</p> <p class="show-used-width">..</p> </div> </div> </div> css #no-width { width: auto; } #width-50 { width: ...
...an element could then explicitly inherit a width/height of a parent, whose computed value is a percentage.
writing-mode - CSS: Cascading Style Sheets
Web › CSS › writing-mode
when set for an entire document, it should be set on the root element (html element for html documents).
... formal definition initial valuehorizontal-tbapplies toall elements except table row groups, table column groups, table rows, and table columnsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax horizontal-tb | vertical-rl | vertical-lr | sideways-rl | sideways-lr examples using multiple writing modes this example demonstrates all of the writing modes, showing each with text in various languages.
str:split() - EXSLT
Web › EXSLT › str › split
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes str:split() splits a string using a pattern string to determine where the splits should occur, returning a node-set containing the resulting strings.
... returns a node-set of token elements, each containing one token from the string.
str:tokenize() - EXSLT
Web › EXSLT › str › tokenize
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes str:tokenize() splits a string using a set of characters as delimiters that determine where the splits should occur, returning a node-set containing the resulting strings.
... returns a node-set of token elements, each containing one token from the string.
Live streaming web audio and video - Developer guides
Web › Guide › Audio and video delivery › Live streaming web audio and video
for example: <video src="rtsp://myhost.com/mymedia.format"> <!-- fallback here --> </video> media source extensions (mse) media source extensions is a w3c working draft that plans to extend htmlmediaelement to allow javascript to generate media streams for playback.
...this approach allows us to download chunks of the video stream using xhr and "append" the chunks to the stream that's played by the <video> element.
Setting up adaptive streaming media sources - Developer guides
Web › Guide › Audio and video delivery › Setting up adaptive streaming media sources
let's say you want to set up an adaptive streaming media source on a server, to be consumed inside an html5 media element.
... once you have generated your mpd file you can reference as expected it from within the <video> element: <video src="my.mpd" type="application/dash+xml"></video> it might be wise to provide a fallback: <video> <source src="my.mpd" type="application/dash+xml"> <!-- fallback --> <source src="my.mp4" type="video/mp4"> <source src="my.webm" type="video/webm"> </video> note: mpeg-dash playback relies on dash.js and browser support for media source extensions, see the latest dash.js referenc...
Graphics on the Web - Developer guides
Web › Guide › Graphics
static images can easily be displayed using the <img> element, or by setting the background of html elements using the background-image property.
... 2d graphics canvas the <canvas> element provides apis to draw 2d graphics using javascript.
Introduction to Web development - Developer guides
Web › Guide › Introduction to Web development
basic structure of a web page — the doctype and document 'tree' fundamental html elements — structural, head, list, form elements and more, explained by category.
... html elements reference guide — a comprehensive guide to html elements with details on how browsers support them css getting started with css — an absolute beginners guide to css covers basic concepts and fundamentals css reference guide — a complete guide to css with details on the level of gecko/firefox support for each.
HTML attribute: accept - HTML: Hypertext Markup Language
Web › HTML › Attributes › accept
it was supported on the <form> element, but was removed in favor of file in html5.
... unique file type specifiers a unique file type specifier is a string that describes a type of file that may be selected by the user in an <input> element of type file.
HTML attribute: pattern - HTML: Hypertext Markup Language
Web › HTML › Attributes › pattern
when true, the element matches the :invalid css pseudo-classes.
...some browsers show a tooltip when an element with a title is hovered, but that leaves out keyboard-only and touch-only users.
HTML attribute: size - HTML: Hypertext Markup Language
Web › HTML › Attributes › size
the size attribute defines the width of the <input> and the height of the <select> element.
...if css targets the element with properties impacting the width, css takes precedence.
theme-color - HTML: Hypertext Markup Language
Web › HTML › Element › meta › name › theme-color
the theme-color value for the name attribute of the <meta> element indicates a suggested color that user agents should use to customize the display of the page or of the surrounding user interface.
... example <meta name="theme-color" content="#4285f4"> the following image shows the effect that the <meta> element above will have on a document displayed in chrome running on an android mobile device.
<spacer> - HTML: Hypertext Markup Language
Web › HTML › Element › spacer
<spacer> is an obsolete html element which allowed insertion of empty spaces on pages.
... attributes like all other html elements, this element supports the global attributes.
accesskey - HTML: Hypertext Markup Language
Web › HTML › Global attributes › accesskey
the accesskey global attribute provides a hint for generating a keyboard shortcut for the current element.
...also, it can be set on any element.
autocapitalize - HTML: Hypertext Markup Language
Web › HTML › Global attributes › autocapitalize
the autocapitalize attribute enables authors to override that behavior per-element.
... the autocapitalize attribute never causes autocapitalization to be enabled for an <input> element with a type attribute whose value is url, email, or password.
itemid - HTML: Hypertext Markup Language
Web › HTML › Global attributes › itemid
an itemid attribute can only be specified for an element that has both itemscope and itemtype attributes.
... also, itemid can only be specified on elements that possess an itemscope attribute whose corresponding itemtype refers to or defines a vocabulary that supports global identifiers.
itemref - HTML: Hypertext Markup Language
Web › HTML › Global attributes › itemref
properties that are not descendants of an element with the itemscope attribute can be associated with an item using the global attribute itemref.
... itemref provides a list of element ids (not itemids) elsewhere in the document, with additional properties the itemref attribute can only be specified on elements that have an itemscope attribute specified.
lang - HTML: Hypertext Markup Language
Web › HTML › Global attributes › lang
the lang global attribute helps define the language of an element: the language that non-editable elements are written in, or the language that the editable elements should be written in by the user.
... recommendation supported on all elements but <applet>, <base>, <basefont>, <br>, <frame>, <frameset>, <iframe>, <param>, and <script>.
part - HTML: Hypertext Markup Language
Web › HTML › Global attributes › part
the part global attribute contains a space-separated list of the part names of the element.
... part names allows css to select and style specific elements in a shadow tree via the ::part pseudo-element.
Choosing between www and non-www URLs - HTTP
Web › HTTP › Basics of HTTP › Choosing between www and non-www URLs
using <link rel="canonical"> it is possible to add a special html <link> element to a page to indicate what the canonical address of a page is.
...in the previous example, http://www.example.org/whaddup would serve the same content as http://example.org/whaddup, but with an additional <link> element in the head: <link href="http://example.org/whaddup" rel="canonical"> unlike the previous case, browser history will consider non-www and www urls as independent entries.
Content Security Policy (CSP) - HTTP
Web › HTTP › CSP
(sometimes you may see mentions of the x-content-security-policy header, but that's an older version and you don't need to specify it anymore.) alternatively, the <meta> element can be used to configure a policy, for example: <meta http-equiv="content-security-policy" content="default-src 'self'; img-src https://*; child-src 'none';"> threats mitigating cross site scripting a primary goal of csp is to mitigate and report xss attacks.
...a policy needs to include a default-src or style-src directive to restrict inline styles from being applied from a <style> element or a style attribute.
Compression in HTTP - HTTP
Web › HTTP › Compression
apache supports compression and uses mod_deflate; for nginx there is ngx_http_gzip_module; for iis, the <httpcompression> element.
... hop-by-hop compression hop-by-hop compression, though similar to end-to-end compression, differs by one fundamental element: the compression doesn't happen on the resource in the server, creating a specific representation that is then transmitted, but on the body of the message between any two nodes on the path between the client and the server.
Content-Language - HTTP
Web › HTTP › Headers › Content-Language
examples indicating the language a document is written in the global lang attribute is used on html elements to indicate the language of an entire html document or parts of it.
... <html lang="de"> do not use this meta element like this for stating a document language: <!-- /!\ this is bad practice --> <meta http-equiv="content-language" content="de"> indicating a target audience for a resource the content-language header is used to specify the intended audience of the page, and can indicate that this is more than one language.
CSP: connect-src - HTTP
Web › HTTP › Headers › Content-Security-Policy › connect-src
if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method than using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
CSP: default-src - HTTP
Web › HTTP › Headers › Content-Security-Policy › default-src
if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method than using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
CSP: font-src - HTTP
Web › HTTP › Headers › Content-Security-Policy › font-src
if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method compared to using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
CSP: img-src - HTTP
Web › HTTP › Headers › Content-Security-Policy › img-src
if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method than using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
CSP: manifest-src - HTTP
Web › HTTP › Headers › Content-Security-Policy › manifest-src
if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method compared to using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
CSP: prefetch-src - HTTP
Web › HTTP › Headers › Content-Security-Policy › prefetch-src
if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method than using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
CSP: worker-src - HTTP
Web › HTTP › Headers › Content-Security-Policy › worker-src
if you only need to allow inline event handlers and not inline <script> elements or javascript: urls, this is a safer method compared to using the unsafe-inline expression.
... 'unsafe-inline' allows the use of inline resources, such as inline <script> elements, javascript: urls, inline event handlers, and inline <style> elements.
Feature-Policy: geolocation - HTTP
Web › HTTP › Headers › Feature-Policy › geolocation
it can do so by delivering the following http response header to define a feature policy: feature-policy: geolocation 'self' https://example.com with an <iframe> element fastcorp inc.
...it can do so by delivering the following http response header to define a feature policy: feature-policy: geolocation 'self' then include an allow attribute on the <iframe> element: <iframe src="https://other.com/map" allow="geolocation"></iframe> iframe attributes can selectively enable features in certain frames, and not in others, even if those frames contain documents from the same origin.
Feature-Policy: unsized-media - HTTP
Web › HTTP › Headers › Feature-Policy › unsized-media
the http feature-policy header unsized-media directive controls whether the current document is allowed to change the size of media elements after the initial layout is complete.
... default value the default value for unsized-media is '*', that is unsized media elements are allowed for all origins by default.
Link - HTTP
Web › HTTP › Headers › Link
it is semantically equivalent to the html <link> element.
... parameters the link header contains parameters, which are separated with ; and are equivalent to attributes of the <link> element.
Referrer-Policy - HTTP
Web › HTTP › Headers › Referrer-Policy
for example, you can set the referrer policy for the entire document with a <meta> element with a name of referrer: <meta name="referrer" content="origin"> or set it for individual requests with the referrerpolicy attribute on <a>, <area>, <img>, <iframe>, <script>, or <link> elements: <a href="http://example.com" referrerpolicy="origin"> alternatively, a noreferrer link relation on an a, area, or link element can be set: <a href="http://example.com" rel="noreferrer"> integration...
... for <style> elements or style attributes, the owner document's referrer policy is used.
HTTP headers - HTTP
Web › HTTP › Headers
accept-ch servers can advertise support for client hints using the accept-ch header field or an equivalent html <meta> element with http-equiv attribute ([html5]).
...it is semantically equivalent to the html <link> element.
Concurrency model and the event loop - JavaScript
Web › JavaScript › EventLoop
when foo returns, the top frame element is popped out of the stack (leaving only bar's call frame).
...so a click on an element with a click event handler will add a message—likewise with any other event.
Introduction - JavaScript
Web › JavaScript › Guide › Introduction
javascript contains a standard library of objects, such as array, date, and math, and a core set of language elements such as operators, control structures, and statements.
...for example, client-side extensions allow an application to place elements on an html form and respond to user events such as mouse clicks, form input, and page navigation.
Regular expression syntax cheatsheet - JavaScript
Web › JavaScript › Guide › Regular Expressions › Cheatsheet
matches are accessed using the index of the the result's elements ([1], ..., [n]) or from the predefined regexp object's properties ($1, ..., $9).
...the matched substring cannot be recalled from the resulting array's elements ([1], ..., [n]) or from the predefined regexp object's properties ($1, ..., $9).
Groups and ranges - JavaScript
Web › JavaScript › Guide › Regular Expressions › Groups and Ranges
matches are accessed using the index of the the result's elements ([1], ..., [n]) or from the predefined regexp object's properties ($1, ..., $9).
...the matched substring cannot be recalled from the resulting array's elements ([1], ..., [n]) or from the predefined regexp object's properties ($1, ..., $9).
JavaScript error reference - JavaScript
Web › JavaScript › Reference › Errors
n statement requires a namesyntaxerror: identifier starts immediately after numeric literalsyntaxerror: illegal charactersyntaxerror: invalid regular expression flag "x"syntaxerror: missing ) after argument listsyntaxerror: missing ) after conditionsyntaxerror: missing : after property idsyntaxerror: missing ; before statementsyntaxerror: missing = in const declarationsyntaxerror: missing ] after element listsyntaxerror: missing formal parametersyntaxerror: missing name after .
...is not iterabletypeerror: more arguments neededtypeerror: reduce of empty array with no initial valuetypeerror: x.prototype.y called on incompatible typetypeerror: can't access dead objecttypeerror: can't access property "x" of "y"typeerror: can't assign to property "x" on "y": not an objecttypeerror: can't define property "x": "obj" is not extensibletypeerror: can't delete non-configurable array elementtypeerror: can't redefine non-configurable property "x"typeerror: cannot use "in" operator to search for "x" in "y"typeerror: cyclic object valuetypeerror: invalid "instanceof" operand "x"typeerror: invalid array.prototype.sort argumenttypeerror: invalid argumentstypeerror: invalid assignment to const "x"typeerror: property "x" is non-configurable and can't be deletedtypeerror: setting getter-only...
Rest parameters - JavaScript
Web › JavaScript › Reference › Functions › rest parameters
// using the same function definition from example above myfun("one", "two") // a, one // b, two // manymoreargs, [] argument length since theargs is an array, a count of its elements is given by the length property: function fun1(...theargs) { console.log(theargs.length) } fun1() // 0 fun1(5) // 1 fun1(5, 6, 7) // 3 ordinary parameter and rest parameters in the next example, a rest parameter is used to collect all parameters after the first into an array.
... each one of them is then multiplied by the first parameter, and the array is returned: function multiply(multiplier, ...theargs) { return theargs.map(element => { return multiplier * element }) } let arr = multiply(2, 1, 2, 3) console.log(arr) // [2, 4, 6] use with the arguments object array methods can be used on rest parameters, but not on the arguments object: function sortrestargs(...theargs) { let sortedargs = theargs.sort() return sortedargs } console.log(sortrestargs(5, 3, 7, 1)) // 1, 3, 5, 7 function sortarguments() { let sortedargs = arguments.sort() return sortedargs // this will never happen } console.log(sortarguments(5, 3, 7, 1)) // throws a typeerror (arguments.sort is not a function) to use array methods on the arguments object, it must be converted ...
Functions - JavaScript
Web › JavaScript › Reference › Functions
a function declaration ceases to be one when it either: becomes part of an expression is no longer a "source element" of a function or the script itself.
... a "source element" is a non-nested statement in the script or a function body: var x = 0; // source element if (x === 0) { // source element x = 10; // not a source element function boo() {} // not a source element } function foo() { // source element var y = 20; // source element function bar() {} // source element while (y === 10) { // source element function blah() {} // not a source element y++; // not a source element } } examples // function declaration function foo() {} // function expression (function bar() {}) // function expression x = function hello() {} if (x) { // function expression function world() {} } // function declaration function a() { // functio...
Array.prototype.copyWithin() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › copyWithin
start optional zero-based index at which to start copying elements from.
... end optional zero-based index at which to end copying elements from.
Array.prototype.fill() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › fill
the fill() method changes all elements in an array to a static value, from a start index (default 0) to an end index (default array.length).
...(note all elements in the array will be this exact value.) start optional start index, default 0.
Array.prototype.flat() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › flat
the flat() method creates a new array with all sub-array elements concatenated into it recursively up to the specified depth.
... return value a new array with the sub-array elements concatenated into it.
Array.prototype.includes() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › includes
the first element to be searched is found at fromindex for positive values of fromindex, or at arr.length + fromindex for negative values of fromindex (using the absolute value of fromindex as the number of elements from the end of the array at which to start the search).
... note: technically speaking, includes() uses the samevaluezero algorithm to determine whether the given element is found.
Array.of() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › of
the difference between array.of() and the array constructor is in the handling of integer arguments: array.of(7) creates an array with a single element, 7, whereas array(7) creates an empty array with a length property of 7 (note: this implies an array of 7 empty slots, not slots with actual undefined values).
... array.of(7); // [7] array.of(1, 2, 3); // [1, 2, 3] array(7); // array of 7 empty slots array(1, 2, 3); // [1, 2, 3] syntax array.of(element0[, element1[, ...[, elementn]]]) parameters elementn elements used to create the array.
Intl.ListFormat - JavaScript
Web › JavaScript › Reference › Global Objects › Intl › ListFormat
instance methods intl.listformat.prototype.format() returns a language-specific formatted string representing the elements of the list.
...bus or car console.log(new intl.listformat('en-gb', { style: 'narrow', type: 'unit' }).format(list)); // > motorcycle bus car using formattoparts the following example shows how to create a list formatter returning formatted parts const list = ['motorcycle', 'bus', 'car']; console.log(new intl.listformat('en-gb', { style: 'long', type: 'conjunction' }).formattoparts(list)); // [ { "type": "element", "value": "motorcycle" }, // { "type": "literal", "value": ", " }, // { "type": "element", "value": "bus" }, // { "type": "literal", "value": ", and " }, // { "type": "element", "value": "car" } ]; specifications specification intl.listformatthe definition of 'listformat' in that specification.
Map() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › Map › Map
syntax new map([iterable]) parameters iterable an array or other iterable object whose elements are key-value pairs.
... (for example, arrays with two elements, such as [[ 1, 'one' ],[ 2, 'two' ]].) each key-value pair is added to the new map.
Map.prototype.forEach() - JavaScript
Web › JavaScript › Reference › Global Objects › Map › forEach
foreach executes the callback function once for each element in the map object.
... examples printing the contents of a map object the following code logs a line for each element in an map object: function logmapelements(value, key, map) { console.log(`map.get('${key}') = ${value}`) } new map([['foo', 3], ['bar', {}], ['baz', undefined]]).foreach(logmapelements) // logs: // "map.get('foo') = 3" // "map.get('bar') = [object object]" // "map.get('baz') = undefined" specifications specification ecmascript (ecma-262)the definition of 'map.prototype.foreach' in that specification.
Promise - JavaScript
Web › JavaScript › Reference › Global Objects › Promise
"use strict"; var promisecount = 0; function testpromise() { let thispromisecount = ++promisecount; let log = document.getelementbyid('log'); // begin log.insertadjacenthtml('beforeend', thispromisecount + ') started (sync code started)'); // we make a new promise: we promise a numeric count of this promise, starting from 1 (after waiting 3s) let p1 = new promise((resolve, reject) => { // the executor function is called with the ability to resolve or reject the promise log.insertadjacenthtml('beforeend', thi...
...lfillment value log.insertadjacenthtml('beforeend', val + ') promise fulfilled (async code terminated)'); }).catch((reason) => { // log the rejection reason console.log(`handle rejected promise (${reason}) here.`); }); // end log.insertadjacenthtml('beforeend', thispromisecount + ') promise made (sync code terminated)'); } if ("promise" in window) { let btn = document.getelementbyid("btn"); btn.addeventlistener("click",testpromise); } else { log = document.getelementbyid('log'); log.innerhtml = "live example not available as your browser doesn't support the <code>promise<code> interface."; } this example is started by clicking the button.
handler.ownKeys() - JavaScript
Web › JavaScript › Reference › Global Objects › Proxy › Proxy › ownKeys
the type of each array element is either a string or a symbol.
... const obj = {}; object.defineproperty(obj, 'a', { configurable: false, enumerable: true, value: 10 } ); const p = new proxy(obj, { ownkeys: function(target) { return [123, 12.5, true, false, undefined, null, {}, []]; } }); console.log(object.getownpropertynames(p)); // typeerror: proxy [[ownpropertykeys]] must return an array // with only string and symbol elements specifications specification ecmascript (ecma-262)the definition of '[[ownpropertykeys]]' in that specification.
Set.prototype.add() - JavaScript
Web › JavaScript › Reference › Global Objects › Set › add
the add() method appends a new element with a specified value to the end of a set object.
... syntax myset.add(value); parameters value the value of the element to add to the set object.
Set.prototype.entries() - JavaScript
Web › JavaScript › Reference › Global Objects › Set › entries
the entries() method returns a new iterator object that contains an array of [value, value] for each element in the set object, in insertion order.
... syntax myset.entries() return value a new iterator object that contains an array of [value, value] for each element in the given set, in insertion order.
String.prototype.anchor() - JavaScript
Web › JavaScript › Reference › Global Objects › String › anchor
also, the html specification no longer allows the <a> element to have a name attribute, so this method doesn't even create valid markup.
...also, the html specification no longer allows the <a> element to have a name attribute, so this method doesn't even create valid markup.
String.prototype.bold() - JavaScript
Web › JavaScript › Reference › Global Objects › String › bold
the bold() method creates a <b> html element that causes a string to be displayed as bold.
... syntax str.bold() return value a string containing a <b> html element.
String.prototype.fixed() - JavaScript
Web › JavaScript › Reference › Global Objects › String › fixed
the fixed() method creates a <tt> html element that causes a string to be displayed in fixed-pitch font.
... syntax str.fixed() return value a string representing a <tt> html element.
String.prototype.italics() - JavaScript
Web › JavaScript › Reference › Global Objects › String › italics
the italics() method creates an <i> html element that causes a string to be italic.
... syntax str.italics() return value a string containing a <i> html element.
String.prototype.strike() - JavaScript
Web › JavaScript › Reference › Global Objects › String › strike
the strike() method creates a <strike> html element that causes a string to be displayed as struck-out text.
... syntax str.strike() return value a string containing a <strike> html element.
String.prototype.sub() - JavaScript
Web › JavaScript › Reference › Global Objects › String › sub
the sub() method creates a <sub> html element that causes a string to be displayed as subscript.
... syntax str.sub() return value a string containing a <sub> html element.
String.prototype.sup() - JavaScript
Web › JavaScript › Reference › Global Objects › String › sup
the sup() method creates a <sup> html element that causes a string to be displayed as superscript.
... syntax str.sup() return value a string containing a <sup> html element.
Symbol.isConcatSpreadable - JavaScript
Web › JavaScript › Reference › Global Objects › Symbol › isConcatSpreadable
the symbol.isconcatspreadable well-known symbol is used to configure if an object should be flattened to its array elements when using the array.prototype.concat() method.
...it can control behavior for arrays and array-like objects: for array objects, the default behavior is to spread (flatten) elements.
TypedArray.prototype.fill() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › fill
the fill() method fills all the elements of a typed array from a start index to an end index with a static value.
... description the elements interval to fill is [start, end).
TypedArray.of() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › of
syntax typedarray.of(element0[, element1[, ...[, elementn]]]) where typedarray is one of: int8array uint8array uint8clampedarray int16array uint16array int32array uint32array float32array float64array bigint64array biguint64array parameters elementn elements of which to create the typed array.
...hence, when working with proxy objects, it calls handler.set to create new elements rather than handler.defineproperty.
WeakRef - JavaScript
Web › JavaScript › Reference › Global Objects › WeakRef
examples using a weakref object this example starts a counter shown in a dom element, stopping when the element doesn't exist anymore: class counter { constructor(element) { // remember a weak reference to the dom element this.ref = new weakref(element); this.start(); } start() { if (this.timer) { return; } this.count = 0; const tick = () => { // get the element from the weak reference, if it still exists const element = thi...
...s.ref.deref(); if (element) { element.textcontent = ++this.count; } else { // the element doesn't exist anymore console.log("the element is gone."); this.stop(); this.ref = null; } }; tick(); this.timer = setinterval(tick, 1000); } stop() { if (this.timer) { clearinterval(this.timer); this.timer = 0; } } } const counter = new counter(document.getelementbyid("counter")); counter.start(); settimeout(() => { document.getelementbyid("counter").remove(); }, 5000); specifications specification weakrefsthe definition of 'weakref' in that specification.
WeakSet.prototype.delete() - JavaScript
Web › JavaScript › Reference › Global Objects › WeakSet › delete
the delete() method removes the specified element from a weakset object.
... return value true if an element in the weakmap object has been removed successfully.
WebAssembly.Table.prototype.length - JavaScript
Web › JavaScript › Reference › Global Objects › WebAssembly › Table › length
the number of elements in the table.
... var table = new webassembly.table({ element: "anyfunc", initial: 2, maximum: 10 }); you can then grow the table by 1 with the following: console.log(table.length); // "2" console.log(table.grow(1)); // "2" console.log(table.length); // "3" specifications specification webassembly javascript interfacethe definition of 'length' in that specification.
Destructuring assignment - JavaScript
Web › JavaScript › Reference › Operators › Destructuring assignment
can also ignore all returned values: [,,] = f(); assigning the rest of an array to a variable when destructuring an array, you can unpack and assign the remaining part of it to a variable using the rest pattern: const [a, ...b] = [1, 2, 3]; console.log(a); // 1 console.log(b); // [2, 3] be aware that a syntaxerror will be thrown if a trailing comma is used on the left-hand side with a rest element: const [a, ...b,] = [1, 2, 3]; // syntaxerror: rest element may not have a trailing comma // always consider using rest operator as the last element unpacking values from a regular expression match when the regular expression exec() method finds a match, it returns an array containing first the entire matched portion of the string and then the portions of the string that matched each parent...
...say you want the third element in the array props below, and then you want the name property in the object, you can do the following: const props = [ { id: 1, name: 'fizz'}, { id: 2, name: 'buzz'}, { id: 3, name: 'fizzbuzz'} ]; const [,, { name }] = props; console.log(name); // "fizzbuzz" the prototype chain is looked up when the object is deconstructed when deconstructing an object, if a property is not accessed ...
this - JavaScript
Web › JavaScript › Reference › Operators › this
it's not exactly dead because it gets executed, but it can be eliminated with no outside effects.) as a dom event handler when a function is used as an event handler, its this is set to the element on which the listener is placed (some browsers do not follow this convention for listeners added dynamically with methods other than addeventlistener()).
... // when called as a listener, turns the related element blue function bluify(e) { // always true console.log(this === e.currenttarget); // true when currenttarget and target are the same object console.log(this === e.target); this.style.backgroundcolor = '#a5d9f3'; } // get a list of every element in the document var elements = document.getelementsbytagname('*'); // add bluify as a click listener so when the // element is clicked on, it turns blue for (var i = 0; i < elements.length; i++) { elements[i].addeventlistener('click', bluify, false); } in an inline event handler when the code is called from an inline on-event handler, its this is set to the dom element on which the listener is placed: <button onclick="alert(this.tagname.tolowercase());"> show this </button> the ab...
for...of - JavaScript
Web › JavaScript › Reference › Statements › for...of
it doesn't log array elements 3, 5, 7 or hello because those are not enumerable properties, in fact they are not properties at all, they are values.
...the object's elements 3, 5, 7 are shown, but none of the object's properties.
for - JavaScript
Web › JavaScript › Reference › Statements › for
function showoffsetpos(sid) { var nleft = 0, ntop = 0; for ( var oitnode = document.getelementbyid(sid); /* initialization */ oitnode; /* condition */ nleft += oitnode.offsetleft, ntop += oitnode.offsettop, oitnode = oitnode.offsetparent /* final-expression */ ); /* semicolon */ console.log('offset position of \'' + sid + '\' element:\n left: ' + nleft + 'px;\n top: ' + ntop + 'px;'); } /* example call: */ showoffsetpos('content'); // output: // "offset position of "con...
...tent" element: // left: 0px; // top: 153px;" note: this is one of the few cases in javascript where the semicolon is mandatory.
Trailing commas - JavaScript
Web › JavaScript › Reference › Trailing commas
trailing commas (sometimes called "final commas") can be useful when adding new elements, parameters, or properties to javascript code.
...st parameter (...p,) => {} // syntaxerror: expected closing parenthesis, got ',' trailing commas in destructuring a trailing comma is also allowed on the left-hand side when using destructuring assignment: // array destructuring with trailing comma [a, b,] = [1, 2]; // object destructuring with trailing comma var o = { p: 42, q: true, }; var {p, q,} = o; again, when using a rest element, a syntaxerror will be thrown: var [a, ...b,] = [1, 2, 3]; // syntaxerror: rest element may not have a trailing comma trailing commas in json trailing commas in objects were only introduced in ecmascript 5.
Values - MathML
Web › MathML › Attribute › Values
lengths several mathml presentation elements have attributes that accept length values used for size or spacing.
...(the "x"-height of the element, 1ex ≈ 0.5em in many fonts) px pixels in inches (1 inch = 2.54 centimeters) cm centimeters mm millimeters pt points (1 point = 1/72 inch) pc picas (1 pica = 12 points) % percentage of the default value.
<menclose> - MathML
Web › MathML › Element › menclose
the mathml <menclose> element renders its content inside an enclosing notation specified by the notation attribute.
... notation a list of notations, separated by white space, to apply to the child elements.
<mglyph> - MathML
Web › MathML › Element › mglyph
the mathml <mglyph> element is used to display non-standard symbols where existing unicode characters are not available.
... it may be used within token elements.
<mmultiscripts> - MathML
Web › MathML › Element › mmultiscripts
the mathml <mmultiscripts> element allows you to create tensor-like objects.
...prescripts are optional and are separated by the empty tag <mprescripts/> (only one <mprescripts /> element is allowed, otherwise you will get an duplicatemprescripts error in the error console and "invalid-markup" in your rendering).
<ms> - MathML
Web › MathML › Element › ms
the mathml <ms> element represents a string literal meant to be interpreted by programming languages and computer algebra systems.
...the content of an <ms> element is not an ascii string per se, but rather a sequence of characters and <mglyph> and <malignmark> elements.
MathML
Web › MathML
mathml reference mathml element reference details about each mathml element and compatibility information for desktop and mobile browsers.
... mathml attribute reference information about mathml attributes that modify the appearance or behavior of elements.
Using audio and video in HTML - Web media technologies
Web › Media › HTML media
the html <audio> and <video> elements let you embed audio and video content into a web page.
...in this guide, we'll review the media elements and how to use them in html content.
Using dns-prefetch - Web Performance
Web › Performance › dns-prefetch
the html <link> element offers this functionality by way of a rel attribute value of dns-prefetch.
... the cross-origin domain is then specified in the href attribute: syntax <link rel="dns-prefetch" href="https://fonts.gstatic.com/" > examples <html> <head> <link rel="dns-prefetch" href="https://fonts.gstatic.com/"> <!-- and all other head elements --> </head> <body> <!-- your page content --> </body> </html> you should place dns-prefetch hints in the <head> element any time your site references resources on cross-origin domains, but there are some things to keep in mind.
Web Performance
Web › Performance
time to hero element), or a threshold over a period of time.
... intersection observer api learn to time element visibility with the intersection observer api and be asynchronously notified when elements of interest becomes visible.
Privacy, permissions, and information security
Web › Privacy
this is the technology behind the https (hypertext transport protocol secured) protocol not all of these are generally directly used within code; notably, the permissions api, feature policy, and the allow attribute on <iframe> elements are primary tools directly used by code to help secure a site and its content.
... keeping personal data safe managing site permissions bringing it all together <using feature policy with permissions and so forth; how to use them together, how they interact, etc> permission requests in <iframe> elements things can get tricky when your web app uses the <iframe> element to embed content from another site inside your own, especially if the document you load into the frame has its own permission needs to consider.
How to make PWAs re-engageable using Notifications and Push - Progressive web apps (PWAs)
Web › Progressive web apps › Re-engageable Notifications Push
instead of showing the notification immediately though, best practice dictates that we should show the popup when the user requests it by clicking on a button: var button = document.getelementbyid("notifications"); button.addeventlistener('click', function(e) { notification.requestpermission().then(function(result) { if(result === 'granted') { randomnotification(); } }); }); this shows a popup using the operating system’s own notifications service: when the user confirms to receive notifications, the app can then show them.
... fetch('./register', { method: 'post', headers: { 'content-type': 'application/json' }, body: json.stringify({ subscription: subscription }), }); then the globaleventhandlers.onclick function on the subscribe button is defined: document.getelementbyid('doit').onclick = function() { const payload = document.getelementbyid('notification-payload').value; const delay = document.getelementbyid('notification-delay').value; const ttl = document.getelementbyid('notification-ttl').value; fetch('./sendnotification', { method: 'post', headers: { 'content-type': 'application/json' }, body: j...
accumulate - SVG: Scalable Vector Graphics
Web › SVG › Attribute › accumulate
four elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, and <animatetransform> usage notes value none | sum default value none animatable no sum specifies that each repeat iteration after the first builds upon the last value of the previous iteration.
... this attribute is ignored if the target attribute value does not support addition, or if the animation element does not repeat.
amplitude - SVG: Scalable Vector Graphics
Web › SVG › Attribute › amplitude
the amplitude attribute controls the amplitude of the gamma function of a component transfer element when its type attribute is gamma.
... four elements are using this attribute: <fefunca>, <fefuncb>, <fefuncg>, and <fefuncr> usage notes value <number> default value 1 animatable yes specifications specification status comment filter effects module level 1the definition of 'amplitude' in that specification.
attributeName - SVG: Scalable Vector Graphics
Web › SVG › Attribute › attributeName
the attributename attribute indicates the name of the css property or attribute of the target element that is going to be changed during an animation.
... four elements are using this attribute: <animate>, <animatecolor>, <animatetransform>, and <set> html, body, svg { height: 100%; } <svg viewbox="0 0 250 250" xmlns="http://www.w3.org/2000/svg"> <rect x="50" y="50" width="100" height="100"> <animate attributetype="xml" attributename="y" from="0" to="50" dur="5s" repeatcount="indefinite"/> </rect> </svg> usage notes value <name> default value none animatable no <name> this value indicates the name of the css property or attribute of the target element to be animated.
color-profile - SVG: Scalable Vector Graphics
Web › SVG › Attribute › color-profile
the color-profile attribute is used to define which color profile a raster image included through the <image> element should use.
... as a presentation attribute, it can be applied to any element but it only has an effect on the following element: <image> usage notes value auto | srgb | <name> | <iri> default value auto animatable yes auto all colors are presumed to be defined in the srgb color space unless a more precise embedded profile is specified within content data.
color - SVG: Scalable Vector Graphics
Web › SVG › Attribute › color
as a presentation attribute, it can be applied to any element, but as noted above, it has no direct effect on svg elements.
... candidate recommendation removed the restriction to which elements it applies.
contentStyleType - SVG: Scalable Vector Graphics
Web › SVG › Attribute › contentStyleType
the contentstyletype attribute specifies the style sheet language for the given document fragment on the <svg> element.
... this language is used for all instances of style that do not specify their own styling language, such as the style attribute that is available on many elements.
d - SVG: Scalable Vector Graphics
Web › SVG › Attribute › d
three elements have this attribute: <path>, <glyph>, and <missing-glyph> html,body,svg { height:100% } <svg viewbox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"> <path fill="none" stroke="red" d="m 10,30 a 20,20 0,0,1 50,30 a 20,20 0,0,1 90,30 q 90,60 50,90 q 10,60 10,30 z" /> </svg> path for <path>, d is a string containing a series of path commands that define the path to be drawn.
...however the <glyph> element has its origin in the bottom left corner of its letterbox.
data-* - SVG: Scalable Vector Graphics
Web › SVG › Attribute › data-*
their custom data are available via the svgelement interface of the element the attributes belong to, with the svgelement.dataset property.
... the svgelement.dataset property is a domstringmap that provides the attribute data-test-value via svgelement.dataset.testvalue.
divisor - SVG: Scalable Vector Graphics
Web › SVG › Attribute › divisor
the divisor attribute specifies the value by which the resulting number of applying the kernelmatrix of a <feconvolvematrix> element to the input image color value is divided to yield the destination color value.
... only one element is using this attribute: <feconvolvematrix> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="convolvematrix1" x="0" y="0" width="100%" height="100%"> <feconvolvematrix kernelmatrix="1 2 0 0 0 0 0 0 -1" divisor="1"/> </filter> <filter id="convolvematrix2" x="0" y="0" width="100%" height="100%"> <feconvolvematrix kernelmatrix="1 2 0 0 0 0 0 0 -1" divisor="8"/> </filter> <image xlink:href="//developer.mozilla.org/files/6457/mdn_logo_only_color.png" width="200" height="200" style="filter:url(#convolvematrix1);"/> <image xlink:href="//developer.mozilla.org/files/6...
exponent - SVG: Scalable Vector Graphics
Web › SVG › Attribute › exponent
four elements are using this attribute: <fefunca>, <fefuncb>, <fefuncg>, and <fefuncr> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <defs> <lineargradient id="gradient" gradientunits="userspaceonuse" x1="0" y1="0" x2="200" y2="0"> <stop offset="0" stop-color="#ff0000" /> <stop offset="0.5" stop-color="#00ff00" /> <stop offset="1" stop-color="#0000ff" /> </lineargradient> </defs> <filter id="componenttransfer1" x="0" y="0" width="100%" height="100%"> <fecomponenttransfer> <fefuncr type="gamma" exponent="1"/> <fefuncg type="gamma" exponent="1"/> <fefuncb type="gamma" exponent="1"/> </fecomponenttransfer> ...
..." height="200" fill="url(#gradient)" style="filter: url(#componenttransfer1);" /> <rect x="0" y="0" width="200" height="200" fill="url(#gradient)" style="filter: url(#componenttransfer2); transform: translatex(220px);" /> </svg> usage notes value <number> default value 1 animatable yes <number> if the type attribute of the component element is set to gamma, this value specifies the exponent of the gamma function specifications specification status comment filter effects module level 1the definition of 'exponent' in that specification.
filter - SVG: Scalable Vector Graphics
Web › SVG › Attribute › filter
the filter attribute specifies the filter effects defined by the <filter> element that shall be applied to its element.
... as a presentation attribute, it can be applied to any element but it only has effect on container elements without the <defs> element, all graphics elements and the <use> element.
filterRes - SVG: Scalable Vector Graphics
Web › SVG › Attribute › filterRes
note that negative values or zero values disable the rendering of the element which referenced the filter.
... only one element is using this attribute: <filter> usage notes value <number-optional-number> default value none animatable yes <number-optional-number> this value takes one or two values, the first one outlining the resolution in horizontal direction, the second one in vertical direction.
filterUnits - SVG: Scalable Vector Graphics
Web › SVG › Attribute › filterUnits
only one element is using this attribute: <filter> usage notes value userspaceonuse | objectboundingbox default value objectboundingbox animatable yes userspaceonuse x, y, width and height represent values in the current coordinate system that results from taking the current user coordinate system in place at the time when the <filter> element is referenced (i.e., the user coordinate system for the element referencing the <filter> element via a filter attribute).
... objectboundingbox in that case, x, y, width and height represent fractions or percentages of the bounding box on the referencing element.
font-size-adjust - SVG: Scalable Vector Graphics
Web › SVG › Attribute › font-size-adjust
« svg attribute reference home the font-size-adjust attribute allows authors to specify an aspect value for an element that will preserve the x-height of the first choice font in a substitute font.
... as a presentation attribute, it can be applied to any element but it has effect only on the following eight elements: <altglyph>, <text>, <textpath>, <tref>, and <tspan> html, body, svg { height: 100%; } <svg width="600" height="80" viewbox="0 0 500 80" xmlns="http://www.w3.org/2000/svg"> <text y="20" font-family="times, serif" font-size="10px"> this text uses the times font (10px), which is hard to read in small sizes.
fx - SVG: Scalable Vector Graphics
Web › SVG › Attribute › fx
only one element is using this attribute: <radialgradient> html, body, svg { height: 100%; } <svg viewbox="0 0 480 200" xmlns="http://www.w3.org/2000/svg"> <defs> <radialgradient id="gradient1" cx="0.5" cy="0.5" r="0.5" fx="0.35" fy="0.35" fr="5%"> <stop offset="0%" stop-color="white"/> <stop offset="100%" stop-color="darkseagreen"/> </radialgradient> <radialgradient id="gradient2" cx="0.5" cy="0.5" r="0.5" fx="0.75" fy="0.35" fr="5%"> <stop offset="0%" stop-color="white"/> <stop offset="100%" stop-color="darkseagreen"/> </radialgradient> </defs> <circle cx="100" cy="100" r="100" fill="url(#gradient1)" /> <circle cx="100" cy="100" r="10...
...0" fill="url(#gradient2)" style="transform: translatex(240px);" /> </svg> usage notes value <length> default value coincides with the presentational value of cx for the element whether the value for cx was inherited or not.
fy - SVG: Scalable Vector Graphics
Web › SVG › Attribute › fy
only one element is using this attribute: <radialgradient> html, body, svg { height: 100%; } <svg viewbox="0 0 480 200" xmlns="http://www.w3.org/2000/svg"> <defs> <radialgradient id="gradient1" cx="0.5" cy="0.5" r="0.5" fx="0.35" fy="0.35" fr="5%"> <stop offset="0%" stop-color="white"/> <stop offset="100%" stop-color="darkseagreen"/> </radialgradient> <radialgradient id="gradient2" cx="0.5" cy="0.5" r="0.5" fx="0.35" fy="0.75" fr="5%"> <stop offset="0%" stop-color="white"/> <stop offset="100%" stop-color="darkseagreen"/> </radialgradient> </defs> <circle cx="100" cy="100" r="100" fill="url(#gradient1)" /> <circle cx="100" cy="100" r="10...
...0" fill="url(#gradient2)" style="transform: translatex(240px);" /> </svg> usage notes value <length> default value coincides with the presentational value of cy for the element whether the value for cy was inherited or not.
glyph-name - SVG: Scalable Vector Graphics
Web › SVG › Attribute › glyph-name
the glyph names can be referenced in kerning definitions created by <hkern> and <vkern> elements.
... only one element is using this attribute: <glyph> context notes value <name># default value none animatable no <name># this value specifies a comma-separated list of names for the glyph.
horiz-adv-x - SVG: Scalable Vector Graphics
Web › SVG › Attribute › horiz-adv-x
three elements are using this attribute: <font>, <glyph>, and <missing-glyph> font for <font> elements, horiz-adv-x specifies the default horizontal advance of a glyph in horizontal orientation.
... glyph, missing-glyph for <glyph> and <missing-glyph> elements, horiz-adv-x specifies the horizontal advance of the glyph in horizontal orientation.
kernelMatrix - SVG: Scalable Vector Graphics
Web › SVG › Attribute › kernelMatrix
the kernelmatrix attribute defines the list of numbers that make up the kernel matrix for the <feconvolvematrix> element.
... only one element is using this attribute: <feconvolvematrix> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="convolvematrix1" x="0" y="0" width="100%" height="100%"> <feconvolvematrix kernelmatrix="1 1 0 0 0 0 0 0 -1"/> </filter> <filter id="convolvematrix2" x="0" y="0" width="100%" height="100%"> <feconvolvematrix kernelmatrix="-1 0 0 0 0 0 0 0 1"/> </filter> <image xlink:href="//developer.mozilla.org/files/6457/mdn_logo_only_color.png" width="200" height="200" style="filter:url(#convolvematrix1);"/> <image xlink:href="//developer.mozilla.or...
keyTimes - SVG: Scalable Vector Graphics
Web › SVG › Attribute › keyTimes
each time value in the keytimes list is specified as a floating point value between 0 and 1 (inclusive), representing a proportional offset into the duration of the animation element.
... four elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, and <animatetransform> html, body, svg { height: 100%; } <svg viewbox="0 0 120 120" xmlns="http://www.w3.org/2000/svg"> <circle cx="60" cy="10" r="10"> <animate attributename="cx" dur="4s" repeatcount="indefinite" values="60 ; 110 ; 60 ; 10 ; 60" keytimes="0 ; 0.25 ; 0.5 ; 0.75 ; 1"/> <animate attributename="cy" dur="4s" repeatcount="indefinite" values="10 ; 60 ; 110 ; 60 ; 10" keytimes="0 ; 0.25 ; 0.5 ; 0.75 ; 1"/> </circle> </svg> usage notes value <number> [ ; <number> ]* ;?
marker-mid - SVG: Scalable Vector Graphics
Web › SVG › Attribute › marker-mid
as a presentation attribute, it can be applied to any element but it has effect only on the following seven elements: <circle>, <ellipse>, <line>, <path>, <polygon>, <polyline>, and <rect> html, body, svg { height: 100%; } <svg viewbox="0 0 120 120" xmlns="http://www.w3.org/2000/svg"> <defs> <marker id="circle" markerwidth="8" markerheight="8" refx="4" refy="4"> <circle cx="4" cy="4" r="4" stroke="none" fill="#f00"/> </marker> </defs> <polyline fill="none" stroke="black" ...
... <marker-ref> this value is a reference to a <marker> element, which will be drawn at the given vertices.
markerHeight - SVG: Scalable Vector Graphics
Web › SVG › Attribute › markerHeight
only one element is using this attribute: <marker> usage notes value <length-percentage> | <number> default value 3 animatable yes <length-percentage> this value defines either an absolute or a relative height of the marker.
... a value of zero disables rendering of the element and negative values are an error.
markerUnits - SVG: Scalable Vector Graphics
Web › SVG › Attribute › markerUnits
usage notes value userspaceonuse | strokewidth default value strokewidth animatable yes userspaceonuse this value specifies that the markerwidth and markerunits attributes and the contents of the <marker> element represent values in the current user coordinate system in place for the graphic object referencing the marker (i.e., the user coordinate system for the element referencing the <marker> element via a marker, marker-start, marker-mid, or marker-end property).
... strokewidth this value specifies that the markerwidth and markerunits attributes and the contents of the <marker> element represent values in a coordinate system which has a single unit equal the size in user units of the current stroke width (see the stroke-width attribute) in place for the graphic object referencing the marker.
markerWidth - SVG: Scalable Vector Graphics
Web › SVG › Attribute › markerWidth
only one element is using this attribute: <marker> usage notes value <length-percentage> | <number> default value 3 animatable yes <length-percentage> this value defines either an absolute or a relative width of the marker.
... a value of zero disables rendering of the element and negative values are an error.
method - SVG: Scalable Vector Graphics
Web › SVG › Attribute › method
the method attribute indicates the method by which text should be rendered along the path of a <textpath> element.
... only one element is using this attribute: <textpath> textpath for <textpath>, method indicates the method by which text should be rendered along the path.
onclick - SVG: Scalable Vector Graphics
Web › SVG › Attribute › onclick
the onclick attribute specifies some script to run when the element is clicked.
... thirty-seven elements are using this attribute: <a>, <altglyph>, <animate>, <animatemotion>, <animatetransform>, <circle>, <defs>, <desc>, <ellipse>, <foreignobject>, <g>, <image>, <line>, <lineargradient>, <marker>, <metadata>, <mpath>, <path>, <pattern>, <polygon>, <polyline>, <radialgradient>, <rect>, <script>, <set>, <stop>, <style>, <svg>, <switch>, <symbol>, <text>, <textpath>, <title>, <tref>, <tspan>, <use>, <view> html, body, svg { height: 100%; margin: 0; } <svg viewbox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"> <circle cx="100" cy="100" r="100" onclick="alert('you have clicked the circle.')" /> </svg> usage notes value <anything> default value none animatable no specifications specification status ...
opacity - SVG: Scalable Vector Graphics
Web › SVG › Attribute › opacity
the opacity attribute specifies the transparency of an object or of a group of objects, that is, the degree to which the background behind the element is overlaid.
... as a presentation attribute, it can be applied to any element but it has effect only on the following elements: <a>, <audio>, <canvas>, <circle>, <ellipse>, <foreignobject>, <g>, <iframe>, <image>, <line>, <marker>, <path>, <polygon>, <polyline>, <rect>, <svg>, <switch>, <symbol>, <text>, <textpath>, <tspan>, <use>, <unknown>, and <video> html, body, svg { height: 100%; } <svg viewbox="0 0 200 100" xmlns="http://www.w3.org/2000/svg"> <defs> <lineargradient id="gradient" x1="0%" y1="0%" x2="0" y2="100%"> <stop offset="0%" style="stop-color:skyblue;" /> <stop offset="100%" style="stop-color:seagreen;" /> </lineargradient> </defs> <rect x="0...
order - SVG: Scalable Vector Graphics
Web › SVG › Attribute › order
the order attribute indicates the size of the matrix to be used by a <feconvolvematrix> element.
... only one element is using this attribute: <feconvolvematrix> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="emboss1" x="0" y="0" width="100%" height="100%"> <feturbulence basefrequency="0.025" seed="0" /> <feconvolvematrix kernelmatrix="3 0 0 0 0 0 0 0 -4" order="3"/> </filter> <filter id="emboss2" x="0" y="0" width="100%" height="100%"> <feturbulence basefrequency="0.025" seed="0" /> <feconvolvematrix kernelmatrix="3 0 0 0 0 0 0 0 -4" order="1 1 1"/> </filter> <rect x="0" y="0" width="200" height="200" style="filter:url(#emboss1);" /> <rect x="0" y="0" width="200" height="200" style="filter:url(#emboss2); transform: translatex(220px);" /> </svg> usage notes value <number-optional-...
paint-order - SVG: Scalable Vector Graphics
Web › SVG › Attribute › paint-order
the paint-order attribute specifies the order that the fill, stroke, and markers of a given shape or text element are painted.
... as a presentation attribute, it can be applied to any element but it has effect only on the following ten elements: <circle>, <ellipse>, <line>, <path>, <polygon>, <polyline>, <rect>, <text>, <textpath>, and <tspan> usage notes value normal | [ fill || stroke || markers ] default value normal animatable yes normal this value indicates that the fill will be painted first, then the stroke, and finally the markers.
pointer-events - SVG: Scalable Vector Graphics
Web › SVG › Attribute › pointer-events
the pointer-events attribute is a presentation attribute that allows defining whether or when an element may be the target of a mouse event.
...ack" /> <circle cx="15" cy="5" r="4" fill="white" pointer-events="none" /> </svg> window.addeventlistener('mouseup', (e) => { // let's pick a random color between #000000 and #ffffff const color = math.round(math.random() * 0xffffff) // let's format the color to fit css requirements const fill = '#' + color.tostring(16).padstart(6,'0') // let's apply our color in the // element we actually clicked on e.target.style.fill = fill }) as a presentation attribute, it can be applied to any element but it is mostly relevant only on the following twenty-three elements: <a>, <circle>, <clippath>, <defs>, <ellipse>, <foreignobject>, <g>, <image>, <line>, <marker>, <mask>, <path>, <pattern>, <polygon>, <polyline>, <rect>, <svg>, <switch>, <symbol>, <text>, <textpath>, <tspan>...
pointsAtX - SVG: Scalable Vector Graphics
Web › SVG › Attribute › pointsAtX
the pointsatx attribute represents the x location in the coordinate system established by attribute primitiveunits on the <filter> element of the point at which the light source is pointing.
... only one element is using this attribute: <fespotlight> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="lighting1" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic"> <fespotlight x="60" y="60" z="50" pointsatx="0" /> </fediffuselighting> </filter> <filter id="lighting2" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic"> <fespotlight x="60" y="60" z="50" pointsatx="400" /> </fediffuselighting> </filter> <rect x="0" y="0" width="200" height="200" style="filter: url(#lighting1);" /> <rect x="0" y="0" width="200" height="200" style="filter: url(#lighting2); transform: translatex(220px);" /> </svg> usage notes default valu...
pointsAtY - SVG: Scalable Vector Graphics
Web › SVG › Attribute › pointsAtY
the pointsaty attribute represents the y location in the coordinate system established by attribute primitiveunits on the <filter> element of the point at which the light source is pointing.
... only one element is using this attribute: <fespotlight> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="lighting1" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic"> <fespotlight x="60" y="60" z="50" pointsaty="0" /> </fediffuselighting> </filter> <filter id="lighting2" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic"> <fespotlight x="60" y="60" z="50" pointsaty="400" /> </fediffuselighting> </filter> <rect x="0" y="0" width="200" height="200" style="filter: url(#lighting1);" /> <rect x="0" y="0" width="200" height="200" style="filter: url(#lighting2); transform: translatex(220px);" /> </svg> usage notes default valu...
pointsAtZ - SVG: Scalable Vector Graphics
Web › SVG › Attribute › pointsAtZ
the pointsatz attribute represents the y location in the coordinate system established by attribute primitiveunits on the <filter> element of the point at which the light source is pointing, assuming that, in the initial local coordinate system, the positive z-axis comes out towards the person viewing the content and assuming that one unit along the z-axis equals one unit in x and y.
... only one element is using this attribute: <fespotlight> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="lighting1" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic"> <fespotlight x="100" y="100" z="50" pointsatz="0" /> </fediffuselighting> </filter> <filter id="lighting2" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic"> <fespotlight x="100" y="100" z="50" pointsatz="80" /> </fediffuselighting> </filter> <rect x="0" y="0" width="200" height="200" style="filter: url(#lighting1);" /> <rect x="0" y="0" width="200" height="200" style="filter: url(#lighting2); transform: translatex(220px);" /> </svg> usage notes default v...
preserveAlpha - SVG: Scalable Vector Graphics
Web › SVG › Attribute › preserveAlpha
the preservealpha attribute indicates how a <feconvolvematrix> element handled alpha transparency.
... only one element is using this attribute: <feconvolvematrix> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="convolvematrix1" x="0" y="0" width="100%" height="100%"> <feconvolvematrix kernelmatrix="1 -1 2 0 0 0 0 0 -2" preservealpha="true"/> </filter> <filter id="convolvematrix2" x="0" y="0" width="100%" height="100%"> <feconvolvematrix kernelmatrix="1 -1 2 0 0 0 0 0 -2" preservealpha="false"/> </filter> <image xlink:href="//developer.mozilla.org/files/6457/mdn_logo_only_color.png" width="200" height="200" style="filter:url(#convolvematrix1);"/> <image xlink:href="//developer.mozilla.org/files/6457/mdn_logo_only_color.png" width="200" height="200" style="filter:url(#convolvematrix2); transform:t...
primitiveUnits - SVG: Scalable Vector Graphics
Web › SVG › Attribute › primitiveUnits
only one element is using this attribute: <filter> usage notes value userspaceonuse | objectboundingbox default value userspaceonuse animatable yes userspaceonuse this value indicates that any length values within the filter definitions represent values in the current user coordinate system in place at the time when the <filter> element is referenced (i.e., the user coordinate system for the element referencing the <filter> element via a filter attribute).
... objectboundingbox this value indicates that any length values within the filter definitions represent fractions or percentages of the bounding box on the referencing element.
restart - SVG: Scalable Vector Graphics
Web › SVG › Attribute › restart
five elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, <animatetransform>, and <set> html, body, svg { height: 100%; } a { fill: blue; text-decoration: underline; cursor: pointer; } <svg viewbox="0 0 220 200" xmlns="http://www.w3.org/2000/svg"> <rect y="30" width="100" height="100"> <animate attributetype="xml" attributename="y" from="30" to="100" dur="5s" repeatcount="1" restart="always" /> </rect> <rect x="120" y="30" width="100" height="100"> <animate attributetype="xml" attributename="y" from="30" to="100" dur="5s" repeatcount="1" restart="whennotactive"/> </rect> <a id="restart"><text y="20">restart animation</text></a> </svg> document.getel...
...ementbyid("restart").addeventlistener("click", evt => { document.queryselectorall("animate").foreach(element => { element.beginelement(); }); }); usage notes value always | whennotactive | never default value always animatable no always this value indicates that the animation can be restarted at any time.
scale - SVG: Scalable Vector Graphics
Web › SVG › Attribute › scale
the amount is expressed in the coordinate system established by the primitiveunits attribute on the <filter> element.
... only one element is using this attribute: <fedisplacementmap> html, body, svg { height: 100%; } <svg viewbox="0 0 480 220" xmlns="http://www.w3.org/2000/svg"> <filter id="displacementfilter" x="-20%" y="-20%" width="140%" height="140%"> <feturbulence type="turbulence" basefrequency="0.05" numoctaves="2" result="turbulence"/> <fedisplacementmap in2="turbulence" in="sourcegraphic" scale="5"/> </filter> <filter id="displacementfilter2" x="-20%" y="-20%" width="140%" height="140%"> <feturbulence type="turbulence" basefrequency="0.05" numoctaves="2" result="turbulence"/> <fedisplacementmap in2="turbulence" in="sourcegraphic" scale="50"/> </filter> <circle cx="100" cy="100" r="80" style="filter: url(#displacementfilter);""/> <circle cx="100" cy="100" r="80" style="...
string - SVG: Scalable Vector Graphics
Web › SVG › Attribute › string
the string attribute is a hint to the user agent, and specifies a list of formats that the font referenced by the parent <font-face-uri> element supports.
... only one element is using this attribute: <font-face-format> usage notes value <anything> default value none animatable no <anything> this value specifies a list of formats that are supported by the font referenced by the parent <font-face-uri> element.
style - SVG: Scalable Vector Graphics
Web › SVG › Attribute › style
the style attribute allows to style an element using css declarations.
... all elements are using this attribute.
to - SVG: Scalable Vector Graphics
Web › SVG › Attribute › to
five elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, <animatetransform>, and <set> html, body, svg { height: 100%; } <svg viewbox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"> <rect x="10" y="10" width="100" height="100"> <animate attributetype="xml" attributename="width" fill="freeze" from="100" to="150" dur="3s"/> </rect> </svg> animate, animatecolor, animatemotion, animatetransform for <animate>, <animatecolor>, <animatemotion>, and <animatetransform>, to specifies the ending value of the animation.
... set for the <set> element, to specifies the value for the attribute during the duration of the element.
transform - SVG: Scalable Vector Graphics
Web › SVG › Attribute › transform
the transform attribute defines a list of transform definitions that are applied to an element and the element's children.
... as a presentation attribute, transform can be used by any element (in svg 1.1, only these 16 elements were allowed to use it: <a>, <circle>, <clippath>, <defs>, <ellipse>, <foreignobject>, <g>, <image>, <line>, <path>, <polygon>, <polyline>, <rect>, <switch>, <text>, and <use>).
vert-adv-y - SVG: Scalable Vector Graphics
Web › SVG › Attribute › vert-adv-y
three elements are using this attribute: <font>, <glyph>, and <missing-glyph> font for <font> elements, vert-adv-y specifies the default vertical advance for a glyph in vertical orientation.
... value <number> default value 1 em as of units-per-em animatable no <number> this value indicates the default vertical advance of the glyph in vertical direction glyph, missing-glyph for <glyph> and <missing-glyph> elements, vert-adv-y specifies the vertical advance for a glyph in vertical orientation.
xlink:arcrole - SVG: Scalable Vector Graphics
Web › SVG › Attribute › xlink:arcrole
the xlink:arcrole attribute specifies a contextual role for the element and corresponds to the rdf primer notion of a property.
...for example, a resource might generically represent a "person," but in the context of a particular arc it might have the role of "mother" and in the context of a different arc it might have the role of "daughter." twentytwo elements are using this attribute: <a>, <altglyph>, <animate>, <animatecolor>, <animatemotion>, <animatetransform>, <color-profile>, <cursor>, <feimage>, <filter>, <font-face-uri>, <glyphref>, <image>, <lineargradient>, <mpath>, <pattern>, <radialgradient>, <script>, <set>, <textpath>, <tref>, <use> usage notes value <iri> default value none animatable no <iri> this value specifies an iri reference that ident...
xlink:title - SVG: Scalable Vector Graphics
Web › SVG › Attribute › xlink:title
note: new content should use a <title> child element rather than a xlink:title attribute.
... these elements are using this attribute: <a>, <altglyph>, <animate>, <animatecolor>, <animatemotion>, <animatetransform>, <color-profile>, <cursor>, <feimage>, <filter>, <font-face-uri>, <glyphref>, <image>, <lineargradient>, <mpath>, <pattern>, <radialgradient>, <script>, <set>, <textpath>, <tref>, and <use> usage context value <anything> default value none animatable no <anything> this value specifies the title used to describe the meaning of the link or resource.
xml:base - SVG: Scalable Vector Graphics
Web › SVG › Attribute › xml:base
all elements are using this attribute.
... usage notes value <iri> default value none animatable no <iri> this value specifies the base iri of the element.
SVG Attribute reference - SVG: Scalable Vector Graphics
Web › SVG › Attribute
svg elements can be modified using attributes that specify details about exactly how the element should be handled or rendered.
... below is a list of all of the attributes available in svg along with links to reference documentation to help you learn which elements support them and how they work.
<altGlyphDef> - SVG: Scalable Vector Graphics
Web › SVG › Element › altGlyphDef
the <altglyphdef> svg element defines a substitution representation for glyphs.
... usage context categoriestext content elementpermitted contenteither: one or more <glyphref> elements, or one or more <altglyphitem> elements attributes global attributes core attributes specific attributes none dom interface this element implements the svgaltglyphdefelement interface.
<altGlyphItem> - SVG: Scalable Vector Graphics
Web › SVG › Element › altGlyphItem
the <altglyphitem> element provides a set of candidates for glyph substitution by the <altglyph> element.
... usage context categoriestext content elementpermitted contentone or more <glyphref> elements example attributes global attributes core attributes specific attributes none dom interface this element implements the svgaltglyphitemelement interface.
<animate> - SVG: Scalable Vector Graphics
Web › SVG › Element › animate
the svg <animate> element provides a way to animate an attribute of an element over time.
...peatcount, repeatdur, fill animation value attributes calcmode, values, keytimes, keysplines, from, to, by other animation attributes most notably: attributename, additive, accumulate animation event attributes most notably: onbegin, onend, onrepeat global attributes core attributes most notably: id styling attributes class, style event attributes global event attributes, document element event attributes usage notes this element implements the svganimateelement interface.
<color-profile> - SVG: Scalable Vector Graphics
Web › SVG › Element › color-profile
the <color-profile> element allows describing the color profile used for the image.
... usage context categoriesnonepermitted contentany number of the following elements, in any order:descriptive elements attributes global attributes core attributes » xlink attributes » specific attributes local name rendering-intent xlink:href dom interface this element implements the svgcolorprofileelement interface.
<feColorMatrix> - SVG: Scalable Vector Graphics
Web › SVG › Element › feColorMatrix
the <fecolormatrix> svg filter element changes colors based on a transformation matrix.
... usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes presentation attributes filter primitive attributes class style specific attributes in type values dom interface this element implements the svgfecolormatrixelement interface.
<feComponentTransfer> - SVG: Scalable Vector Graphics
Web › SVG › Element › feComponentTransfer
usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<fefunca>, <fefuncr>, <fefuncb>, <fefuncg> attributes global attributes core attributes presentation attributes filter primitive attributes class style specific attributes in dom interface this element implements the svgfecomponenttransferelement interface.
... working draft specified that missing transfer function elements are treated like they were specified with their type attributes set to identity.
<feDropShadow> - SVG: Scalable Vector Graphics
Web › SVG › Element › feDropShadow
it can only be used inside a <filter> element.
... value type: <number>; default value: 2; animatable: yes global attributes core attributes most notably: id styling attributes class, style filter primitive attributes height, in, result, x, y, width presentation attributes most notably: flood-color, flood-opacity usage notes categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<animate>, <script>, <set> specifications specification status comment filter effects module level 1the definition of '<fedropshadow>' in that specification.
<feFuncA> - SVG: Scalable Vector Graphics
Web › SVG › Element › feFuncA
the <fefunca> svg filter primitive defines the transfer function for the alpha component of the input graphic of its parent <fecomponenttransfer> element.
... usage context categoriesnonepermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes transfer function attributes specific attributes none dom interface this element implements the svgfefuncaelement interface.
<feFuncB> - SVG: Scalable Vector Graphics
Web › SVG › Element › feFuncB
the <fefuncb> svg filter primitive defines the transfer function for the blue component of the input graphic of its parent <fecomponenttransfer> element.
... usage context categoriesnonepermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes transfer function attributes specific attributes none dom interface this element implements the svgfefuncbelement interface.
<feFuncG> - SVG: Scalable Vector Graphics
Web › SVG › Element › feFuncG
the <fefuncg> svg filter primitive defines the transfer function for the green component of the input graphic of its parent <fecomponenttransfer> element.
... usage context categoriesnonepermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes transfer function attributes specific attributes none dom interface this element implements the svgfefuncgelement interface.
<feFuncR> - SVG: Scalable Vector Graphics
Web › SVG › Element › feFuncR
the <fefuncr> svg filter primitive defines the transfer function for the red component of the input graphic of its parent <fecomponenttransfer> element.
... usage context categoriesnonepermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes transfer function attributes specific attributes none dom interface this element implements the svgfefuncrelement interface.
<feMergeNode> - SVG: Scalable Vector Graphics
Web › SVG › Element › feMergeNode
usage context categoriesnonepermitted contentany number of the following elements, in any order:<animate>, <set> example <svg width="200" height="200" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <filter id="feoffset" x="-40" y="-20" width="100" height="200"> <feoffset in="sourcegraphic" dx="60" dy="60" /> <fegaussianblur in="sourcegraphic" stddeviation="5" result="blur2" /> <femerge> <femergenode in="blur2" /> <femergenode in="sourcegraphic" /> </femerge> </filter> <rect x="40" y="40" width="100" height="100" style="stroke: #000000; fill: green; filter: url(#feoffset);" /> <rec...
...t x="40" y="40" width="100" height="100" style="stroke: #000000; fill: green;" /> </svg> result attributes global attributes core attributes » specific attributes in dom interface this element implements the svgfemergenodeelement interface.
<feSpecularLighting> - SVG: Scalable Vector Graphics
Web › SVG › Element › feSpecularLighting
usage context categoriesfilter primitive elementpermitted contentexactly one light source element first and any number of descriptive elements in any order.
... attributes global attributes core attributes presentation attributes filter primitive attributes class style specific attributes in surfacescale specularconstant specularexponent kernelunitlength dom interface this element implements the svgfespecularlightingelement interface.
<font-face-format> - SVG: Scalable Vector Graphics
Web › SVG › Element › font-face-format
the <font-face-format> svg element describes the type of font referenced by its parent <font-face-uri>.
... usage context categoriesfont elementpermitted contentempty attributes global attributes core attributes specific attributes string dom interface this element implements the svgfontfaceformatelement interface.
<font-face-name> - SVG: Scalable Vector Graphics
Web › SVG › Element › font-face-name
the <font-face-name> element points to a locally installed copy of this font, identified by its name.
... usage context categoriesnonepermitted contentempty attributes global attributes core attributes » specific attributes name dom interface this element implements the svgfontfacenameelement interface.
<font-face-src> - SVG: Scalable Vector Graphics
Web › SVG › Element › font-face-src
the <font-face-src> svg element corresponds to the src descriptor in css @font-face rules.
... usage context categoriesfont elementpermitted contentone or more of the following elements, in any order:<font-face-name>, <font-face-uri> attributes global attributes core attributes specific attributes none dom interface this element implements the svgfontfacesrcelement interface.
<font-face-uri> - SVG: Scalable Vector Graphics
Web › SVG › Element › font-face-uri
the <font-face-uri> svg element points to a remote definition of the current font.
... usage context categoriesfont elementpermitted contentany number of the following elements, in any order:<font-face-format> attributes global attributes core attributes xlink attributes specific attributes xlink:href dom interface this element implements the svgfontfaceurielement interface.
<font> - SVG: Scalable Vector Graphics
Web › SVG › Element › font
the <font> svg element defines a font to be used for text layout.
... usage context categoriesfont elementpermitted contentany number of the following elements, in any order:descriptive elements<font-face>, <glyph>, <hkern>, <missing-glyph>, <vkern> attributes global attributes core attributes presentation attributes class style externalresourcesrequired specific attributes horiz-origin-x horiz-origin-y horiz-adv-x vert-origin-x vert-origin-y vert-adv-y dom interface this element implements the svgfontelement interface.
<glyph> - SVG: Scalable Vector Graphics
Web › SVG › Element › glyph
usage context categoriestext content elementpermitted contentany number of the following elements, in any order:animation elementsdescriptive elementsshape elementsstructural elementsgradient elements<a>, <altglyphdef>, <clippath>, <color-profile>, <cursor>, <filter>, <font>, <font-face>, <foreignobject>, <image>, <marker>, <mask>, <pattern>, <script>, <style>, <switch>, <text>, <view> attributes global attributes core attributes presentation attributes class style specific attributes d horiz-adv-x vert-origin-x vert-origin-y vert-adv-y unicode glyph-name orientation arabic-form lang dom interface this element implements the svgglyphelement interface.
... example svg <svg width="400px" height="300px" version="1.1" xmlns="http://www.w3.org/2000/svg"> <!-- example copied from https://www.w3.org/tr/svg/fonts.html#glyphelement --> <defs> <font id="font1" horiz-adv-x="1000"> <font-face font-family="super sans" font-weight="bold" font-style="normal" units-per-em="1000" cap-height="600" x-height="400" ascent="700" descent="300" alphabetic="0" mathematical="350" ideographic="400" hanging="500"> <font-face-src> <font-face-name name="super sans bold"/> </font-face-src> </font-face> <missing-glyph><path d="m0,0h200v200h-200z"/></missing-glyph> <glyph unicode="!" horiz-adv-x="80" d="m0,0h200v200h-200z"></glyph> <glyph unicode="@" d="m0,50l100,300l400,100z"></...
<glyphRef> - SVG: Scalable Vector Graphics
Web › SVG › Element › glyphRef
the glyphref element provides a single possible glyph to the referencing <altglyph> substitution.
... usage context categoriestext content elementpermitted contentempty attributes global attributes core attributes » presentation attributes » xlink attributes » class style specific attributes x y dx dy glyphref format xlink:href dom interface this element implements the svgglyphrefelement interface.
<hatchpath> - SVG: Scalable Vector Graphics
Web › SVG › Element › hatchpath
the <hatchpath> svg element defines a hatch path used by the <hatch> element.
... usage context categoriesnonepermitted contentany number of the following elements, in any order:animation elementsdescriptive elements<script>, <style> attributes global attributes core attributes global event attributes presentation attributes style attributes specific attributes d offset dom interface this element implements the svghatchpathelement interface.
<hkern> - SVG: Scalable Vector Graphics
Web › SVG › Element › hkern
the <hkern> svg element allows to fine-tweak the horizontal distance between two glyphs.
... usage context categoriesfont elementpermitted contentempty attributes global attributes core attributes specific attributes u1 g1 u2 g2 k dom interface this element implements the svghkernelement interface.
<line> - SVG: Scalable Vector Graphics
Web › SVG › Element › line
the <line> element is an svg basic shape used to create a line connecting two points.
...a-level, aria-live, aria-modal, aria-multiline, aria-multiselectable, aria-orientation, aria-owns, aria-placeholder, aria-posinset, aria-pressed, aria-readonly, aria-relevant, aria-required, aria-roledescription, aria-rowcount, aria-rowindex, aria-rowspan, aria-selected, aria-setsize, aria-sort, aria-valuemax, aria-valuemin, aria-valuenow, aria-valuetext, role usage notes categoriesbasic shape element, graphics element, shape elementpermitted contentany number of the following elements, in any order:animation elementsdescriptive elements specifications specification status comment scalable vector graphics (svg) 2the definition of '<line>' in that specification.
<marker> - SVG: Scalable Vector Graphics
Web › SVG › Element › marker
the <marker> element defines the graphic that is to be used for drawing arrowheads or polymarkers on a given <path>, <line>, <polyline> or <polygon> element.
...ria-level, aria-live, aria-modal, aria-multiline, aria-multiselectable, aria-orientation, aria-owns, aria-placeholder, aria-posinset, aria-pressed, aria-readonly, aria-relevant, aria-required, aria-roledescription, aria-rowcount, aria-rowindex, aria-rowspan, aria-selected, aria-setsize, aria-sort, aria-valuemax, aria-valuemin, aria-valuenow, aria-valuetext, role usage notes categoriescontainer elementpermitted contentany number of the following elements, in any order:animation elementsdescriptive elementsshape elementsstructural elementsgradient elements<a>, <altglyphdef>, <clippath>, <color-profile>, <cursor>, <filter>, <font>, <font-face>, <foreignobject>, <image>, <marker>, <mask>, <pattern>, <script>, <style>, <switch>, <text>, <view> specifications specification status co...
<mask> - SVG: Scalable Vector Graphics
Web › SVG › Element › mask
the <mask> element defines an alpha mask for compositing the current object into the background.
...s most notably: requiredextensions, systemlanguage presentation attributes most notably: clip-path, clip-rule, color, display, fill, fill-opacity, fill-rule, filter, mask, opacity, shape-rendering, stroke, stroke-dasharray, stroke-dashoffset, stroke-linecap, stroke-linejoin, stroke-miterlimit, stroke-opacity, stroke-width, transform, vector-effect, visibility usage notes categoriescontainer elementpermitted contentany number of the following elements, in any order:animation elementsdescriptive elementsshape elementsstructural elementsgradient elements<a>, <altglyphdef>, <clippath>, <color-profile>, <cursor>, <filter>, <font>, <font-face>, <foreignobject>, <image>, <marker>, <mask>, <pattern>, <script>, <style>, <switch>, <text>, <view> specifications specification status co...
<missing-glyph> - SVG: Scalable Vector Graphics
Web › SVG › Element › missing-glyph
the <missing-glyph> svg element's content is rendered, if for a given character the font doesn't define an appropriate <glyph>.
... usage context categoriesnonepermitted contentany number of the following elements, in any order:animation elementsdescriptive elementsshape elementsstructural elementsgradient elements<a>, <altglyphdef>, <clippath>, <color-profile>, <cursor>, <filter>, <font>, <font-face>, <foreignobject>, <image>, <marker>, <mask>, <pattern>, <script>, <style>, <switch>, <text>, <view> attributes global attributes core attributes presentation attributes class style specific attributes d horiz-adv-x vert-origin-x vert-origin-y vert-adv-y dom interface this element implements the svgmissingglyphelement interface.
<mpath> - SVG: Scalable Vector Graphics
Web › SVG › Element › mpath
the <mpath> sub-element for the <animatemotion> element provides the ability to reference an external <path> element as the definition of a motion path.
... usage context categoriesanimation elementpermitted contentany number of the following elements, in any order:descriptive elements attributes global attributes core attributes » xlink attributes » externalresourcesrequired specific attributes xlink:href dom interface this element implements the svgmpathelement interface.
<solidcolor> - SVG: Scalable Vector Graphics
Web › SVG › Element › solidColor
the <solidcolor> svg element lets authors define a single color for use in multiple places in an svg document.
... dom interface this element implements the svgsolidcolorelement interface.
<view> - SVG: Scalable Vector Graphics
Web › SVG › Element › view
usage context categoriesnonepermitted contentany number of the following elements, in any order:descriptive elements attributes global attributes aria attributes » core attributes » global event attributes » externalresourcesrequired specific attributes viewbox preserveaspectratio zoomandpan viewtarget example svg <svg width="600" height="200" viewbox="0 0 600 200" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <defs> <radialgradient id="gradient"> <stop offset="0%" stop-color="#8cffa0" /> <stop offset="100%" stop-color="#8ca0ff" /> </radialgradient> </defs> <circle r="50" cx="180" cy="50" style="fill:url(#gradient)"/> <view...
..."0 0 600 200"/> <view id="doublesizeview" viewbox="0 0 300 100"/> <a xlink:href="#halfsizeview"> <text x="5" y="20" font-size="20">half size</text> </a> <a xlink:href="#normalsizeview"> <text x="5" y="40" font-size="20">normal size</text> </a> <a xlink:href="#doublesizeview"> <text x="5" y="60" font-size="20">double size</text> </a> </svg> result dom interface this element implements the svgviewelement interface.
<vkern> - SVG: Scalable Vector Graphics
Web › SVG › Element › vkern
the <vkern> svg element allows to fine-tweak the vertical distance between two glyphs in top-to-bottom fonts.
... usage context categoriesfont elementpermitted contentempty attributes global attributes core attributes specific attributes u1 g1 u2 g2 k dom interface this element implements the svgvkernelement interface.
SVG Filters Tutorial - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › SVG Filters Tutorial
with the filter element <filter> it is possible to add these effects and later on attach them to an object.
... this element has different attributes that help us create the clipping region.
Referer header: privacy and security concerns - Web security
Web › Security › Referer header: privacy and security concerns
the referrerpolicy attribute on html elements that are in danger of leaking such information (such as <img> and <a>).
... the rel attribute set to noreferrer on html elements that are in danger of leaking such information (such as <img> and <a>).
Web security
Web › Security
weak signature algorithms the strength of the hash algorithm used in signing a digital certificate is a critical element of the security of the certificate.
... clickjacking protection in clickjacking, a user is fooled into clicking on a ui element that performs some action other than what the user expects.
format-number - XPath
Web › XPath › Functions › format-number
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the format-number function evaluates a number and returns a string representing the number in a given format.
...here is the java se 6 decimalformat.) decimal-format (optional) the name of an xsl:decimal-format element that defines the number format to be used.
namespace-uri - XPath
Web › XPath › Functions › namespace-uri
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the namespace-uri function returns a string representing the namespace uri of the first node in a given node-set.
... for nodes other than element and attribute nodes, the returned string will always be an empty string.
Functions - XPath
Web › XPath › Functions
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the following is an annotated list of core xpath functions and xslt-specific additions to xpath, including a description, syntax, a list of arguments, result-type, source in the appropriate w3c recommendation, and degree of present gecko support.
... boolean() ceiling() choose() concat() contains() count() current() xslt-specific document() xslt-specific element-available() false() floor() format-number() xslt-specific function-available() generate-id() xslt-specific id() (partially supported) key() xslt-specific lang() last() local-name() name() namespace-uri() normalize-space() not() number() position() round() starts-with() string() string-length() substring() substring-after() substring-before() sum() system-property() xslt-specific translate() true() unparsed-entity-url() xslt-specific (not supported) ...
XPath
Web › XPath
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes xpath stands for xml path language.
... xpath is mainly used in xslt, but can also be used as a much more powerful way of navigating through the dom of any xml-like language document using xpathexpression, such as html and svg, instead of relying on the document.getelementbyid() or parentnode.queryselectorall() methods, the node.childnodes properties, and other dom core features.
<xsl:choose> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › choose
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:choose> element defines a choice among a number of alternatives.
...it contains one or more <xsl:when> elements, and, optionally, a final <xsl:otherwise> element.
<xsl:copy> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › copy
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:copy> element transfers a shallow copy (the node and any associated namespace node) of the current node to the output document.
... optional attributes use-attribute-sets lists attribute sets that should be applied to the output node, if it is an element.
<xsl:for-each> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › for-each
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:for-each> element selects a set of nodes and processes each of them in the same way.
...if one or more <xsl:sort> elements appear as the children of this element, sorting occurs before processing.
<xsl:if> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › if
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:if> element contains a test attribute and a template.
...to achieve the functionality of an if-then-else statement, however, use the <xsl:choose> element with one <xsl:when> and one <xsl:otherwise> children.
<xsl:otherwise> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › otherwise
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:otherwise> element is used to define the action that should be taken when none of the <xsl:when> conditions apply.
... type subinstruction, must appear as the last child of an <xsl:choose> element, within a template.
<xsl:strip-space> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › strip-space
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:strip-space> element defines the elements in the source document for which whitespace should be removed.
... syntax <xsl:strip-space elements=list-of-element-names /> required attributes elements specifies a space-separated list of elements in the source whose whitespace-only text nodes should be removed.
JavaScript/XSLT Bindings - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › XSLT JS interface in Gecko › JavaScript XSLT Bindings
assuming that the dom to be processed is contained by an element with the id example, that dom can be "cloned" using the in-memory xml document's document.importnode() method.
... // importnode is used to clone the nodes we want to process via xslt - true makes it do a deep clone var mynode = document.getelementbyid("example"); var clonednode = xmlref.importnode(mynode, true); // add the cloned dom into the xml document xmlref.appendchild(clonednode); once the stylesheet has been imported, xsltprocessor has to perform two methods for the actual transformation, namely xsltprocessor.transformtodocument() and xsltprocessor.transformtofragment().
XSLT: Extensible Stylesheet Language Transformations
Web › XSLT
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes extensible stylesheet language transformations (xslt) is an xml-based language used, in conjunction with specialized processing software, for the transformation of xml documents.
... documentation xslt element reference reference.
Compiling a New C/C++ Module to WebAssembly - WebAssembly
WebAssembly › C to wasm
add a <button> element as shown below, just above the first opening <script type='text/javascript'> tag.
... <button class="mybutton">run myfunction</button> now add the following code at the end of the first <script> element: document.queryselector('.mybutton') .addeventlistener('click', function() { alert('check console'); var result = module.ccall( 'myfunction', // name of c function null, // return type null, // argument types null // arguments ); }); this illustrates how ccall() is used to call the exported function.
Compiling an Existing C Module to WebAssembly - WebAssembly
WebAssembly › existing C to wasm
luckily, the canvas api has canvasrenderingcontext2d.getimagedata — that gives you an uint8clampedarray containing the image data in rgba: async function loadimage(src) { // load image const imgblob = await fetch(src).then(resp => resp.blob()); const img = await createimagebitmap(imgblob); // make canvas same size as image const canvas = document.createelement('canvas'); canvas.width = img.width; canvas.height = img.height; // draw image onto canvas const ctx = canvas.getcontext('2d'); ctx.drawimage(img, 0, 0); return ctx.getimagedata(0, 0, img.width, img.height); } now it's "only" a matter of copying the data from javascript into wasm.
...to prove that it worked, turn your result buffer into a blob and use it on an <img> element: const blob = new blob([result], {type: 'image/webp'}); const bloburl = url.createobjecturl(blob); const img = document.createelement('img'); img.src = bloburl; document.body.appendchild(img) behold, the glory of a new webp image.
2015 MDN Fellowship Program - Archive of obsolete content
Archive › 2015 MDN Fellowship Program
in 2015, mdn will expand the impact of this content by developing kits of key learning materials, including such elements as code samples, videos and other elements being finalized.
Loading Content Scripts - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Guides › Content Scripts › Loading Content Scripts
it takes one of three possible values: "start" loads the scripts immediately after the document element for the page is inserted into the dom.
High-Level APIs - Archive of obsolete content
Archive › Add-ons › Add-on SDK › High-Level APIs
addon-page create a page that does not contain navigational elements.
/loader - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › loader
it examines each element until it finds the prefix matching the supplied id and replaces it with the location it maps to: let mapping = [ [ 'sdk/', 'resource://gre/modules/commonjs/sdk/' ], [ './', 'resource://my-addon/' ], [ '', 'resource:///modules/' ] ]; resolveuri('./main', mapping); // => resource://my-addon/main.js resolveuri('devtools/gcli', mapping); // => resource:///modul...
console/traceback - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › console traceback
the stack is represented as an array in which the most recent stack frame is the last element; each element thus represents a stack frame and has the following keys: filename the name of the file that the stack frame takes place in.
remote/child - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › remote child
each element in this list is a frame.
ui/button/toggle - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs › ui button toggle
the only purpose of the extra event is that change is a more natural event name for a toggle button, as it matches the change event emitted by elements like <select> and <input>.
Low-Level APIs - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Low-Level APIs
xul <iframe> elements) that are not displayed to the user.
Storing annotations - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Tutorials › Annotator › Storing annotations
the annotation is composed of the text the user entered and the "annotation anchor", which consists of the url, element id and element content: function handlenewannotation(annotationtext, anchor) { var newannotation = new annotation(annotationtext, anchor); simplestorage.storage.annotations.push(newannotation); } this function calls a constructor for an annotation object, which we also need to supply: function annotation(annotationtext, anchor) { this.annotationtext = annotationtext; this.url = anchor[...
Localization - Archive of obsolete content
Archive › Add-ons › Add-on SDK › Tutorials › l10n
hello_id= <blink>hello!</blink> localizing element attributes this feature is new in firefox 39 you can localize certain attributes of elements with an l10n-id by setting its value with l10n-id.attributename in the properties file like: hello_id.accesskey= h the following attributes are supported: accesskey alt label title placeholder further the localization of the aria attributes aria-label, aria-valuetext and aria-moz-hint are sup...
Alerts and Notifications - Archive of obsolete content
Archive › Add-ons › Code snippets › Alerts and Notifications
.getservice(components.interfaces.nsiwindowwatcher) .openwindow(null, 'chrome://global/content/alerts/alert.xul', '_blank', 'chrome,titlebar=no,popup=yes', null); win.arguments = [image, title, msg, false, '']; } using notification box another way of non-modal notification and further interaction with users is using of xul elements notificationbox and notification (implicitly).
Autocomplete - Archive of obsolete content
Archive › Add-ons › Code snippets › Autocomplete
first, declare a panel with the "autocomplete" type, like so: <panel id="popup_autocomplete" type="autocomplete" noautofocus="true" /> now set the autocompletepopup attribute of your <browser> element to the id of the panel you just declared: <browser id="my_browser" ...
Cookies - Archive of obsolete content
Archive › Add-ons › Code snippets › Cookies
reading existing cookies cookies for a given host, represented as nsicookie2 objects, can be enumerated as such: let enum = services.cookies.getcookiesfromhost("example.com"); while (enum.hasmoreelements()) { var cookie = enum.getnext().queryinterface(ci.nsicookie2); dump(cookie.host + ";" + cookie.name + "=" + cookie.value + "\n"); } all cookies, regardless of host, can be enumerated using services.cookies.enumerator rather than getcookiesfromhost().
Downloading Files - Archive of obsolete content
Archive › Add-ons › Code snippets › Downloading Files
var privacy = privatebrowsingutils.privacycontextfromwindow(aurlsourcewindow); var progresselement = document.getelementbyid("progress_element"); persist.progresslistener = { onprogresschange: function(awebprogress, arequest, acurselfprogress, amaxselfprogress, acurtotalprogress, amaxtotalprogress) { var percentcomplete = math.round((acurtotalprogress / amaxtotalprogress) * 100); progresselement.textcontent = percentcomplete +"%"; }, onstatechange: function(awebprogress, arequest...
Drag & Drop - Archive of obsolete content
Archive › Add-ons › Code snippets › Drag & Drop
first, you need to hook up the basic drag event handlers: elem.addeventlistener("dragover", _dragover, true); elem.addeventlistener("dragdrop", _dragdrop, true); here, elem could be a window or an xul element.
Progress Listeners - Archive of obsolete content
Archive › Add-ons › Code snippets › Progress Listeners
}, // for definitions of the remaining functions see related documentation onprogresschange: function(awebprogress, arequest, curself, maxself, curtot, maxtot) {}, onstatuschange: function(awebprogress, arequest, astatus, amessage) {}, onsecuritychange: function(awebprogress, arequest, astate) {} } attach the progress listener to a <browser> or a <tabbrowser> element using addprogresslistener, for example for firefox put the following code in a load listener of a main window: gbrowser.addprogresslistener(mylistener); when used with a browser, the second argument is a mask which determines the type of events that will be received.
Scrollbar - Archive of obsolete content
Archive › Add-ons › Code snippets › Scrollbar
scrollbars inside browser elements will be styled to.
Tabbox - Archive of obsolete content
Archive › Add-ons › Code snippets › Tabbox
handling onclosetab event assuming the tabbox, tabs, and tabpanels widgets with id's the same as their nodename, this function will correctly remove the current tab and tab panel for the onclosetab tabs event: function removetab(){ var tabbox = document.getelementbyid("tabbox"); var currentindex = tabbox.selectedindex; if(currentindex>=0){ var tabs=document.getelementbyid("tabs"); var tabpanels=document.getelementbyid("tabpanels"); tabpanels.removechild(tabpanels.childnodes[currentindex]); tabs.removeitemat(currentindex); /*work around if last tab is removed, widget fails to advance to next tab*/ if(-1 == tabbox.selectedinde...
xml:base support in old browsers - Archive of obsolete content
Archive › Add-ons › Code snippets › XML › base function
// var ns = 'http://www.w3.org/xml/1998/namespace'; var att, protocolpos; var xmlbase = ''; var abs = false; // avoid loop if node is not present if (!thisitem || !thisitem.nodename) { return xmlbase; } // check present element and higher up for xml:base // now check for the next matching local name up in the hierarchy (until the document root) while (thisitem.nodename !== '#document' && thisitem.nodename !== '#document-fragment') { att = thisitem.getattribute('xml:base'); // xml: namespaces must use 'xml' prefix if (att) { protocolpos = att.indexof('//'); var protocolmatch = att.match(scheme); if (proto...
XPath - Archive of obsolete content
Archive › Add-ons › Code snippets › XPath
hexpression,returnedxml,namespaceresolver,returntype,result); //contextnode should be used in the one in which it was created //add by mooring 2008-11-15 16:00 china var xhr = new ajax('post','demo.xml',parsexml,'xml'); //ajax is a class written by javascript which return responsexml object to parsexml function function parsexml(obj)//obj is the returnxml object now { if(!obj.documentelement) { alert("your browser does't support this script!"); return; } var fields = [];//store the results if(window.activexobject) { var tobj = obj.documentelement.selectnodes("/root/field/item"); for(var i=0;i<tobj.length; i++) { fields.push(tobj[i].text); } } else { var tobj = obj.evaluate("/root/field/item",obj.documentelement,null, xpathresult.any_type, null); var tmp =...
XUL School Tutorial - Archive of obsolete content
Archive › Add-ons › Overlay Extensions › XUL School
adding menus and submenus adding toolbars and toolbar buttons adding events and commands adding windows and dialogs adding sidebars user notifications and alerts intermediate functionality intercepting page loads connecting to remote content handling preferences local storage advanced topics the box model xpcom objects observer notifications custom xul elements with xbl mozilla documentation roadmap useful mozilla community sites appendices appendix a: add-on performance appendix b: install and uninstall scripts appendix c: avoiding using eval in add-ons appendix d: loading scripts appendix e: dom building and html insertion appendix f: monitoring dom changes the xul school project was developed by appcoast (formerly glax...
Extensions support in SeaMonkey 2 - Archive of obsolete content
Archive › Add-ons › SeaMonkey 2
although this doesn't affect the appearance of the display, it may affect your extension if it overlays chrome relative to these elements.
Session store API - Archive of obsolete content
Archive › Add-ons › Session store API
however seamonkey reuses the browser element (up to the undo close tab limit) which means that you can set state on the browser element and it will be restored with the tab.
Setting up an extension development environment - Archive of obsolete content
Archive › Add-ons › Setting up extension development environment
chromebug combines elements of a javascript debugger and dom (firefox, "kinda works for thunderbird") mozrepl explore and modify firefox and other mozilla apps while they run (firefox, thunderbird version is not working) executejs an enhanced javascript console (firefox version, thunderbird version is not working) xpcomviewer an xpcom inspector (firefox and thunderbird) javascript shells to test snippets of javascript ...
Using the Stylesheet Service - Archive of obsolete content
Archive › Add-ons › Using the Stylesheet Service
in particular, they can apply styles to native anonymous elements and to css anonymous boxes.
Creating a status bar extension - Archive of obsolete content
Archive › Creating a status bar extention
the chrome is the set of user interface elements outside the content area of the application's window, such as toolbars, status bars, menu bars, and the like.
MozAudioAvailable - Archive of obsolete content
Archive › Events › MozAudioAvailable
general info specification dom l3 interface event bubbles no cancelable no target element default action none.
cached - Archive of obsolete content
Archive › Events › cached
general info specification offline interface event bubbles no cancelable no target applicationcache default action none properties property type description target eventtarget (dom element) the event target (the topmost target in the dom tree).
checking - Archive of obsolete content
Archive › Events › checking
general info specification offline interface event bubbles no cancelable no target applicationcache default action none properties property type description target eventtarget (dom element) the event target (the topmost target in the dom tree).
downloading - Archive of obsolete content
Archive › Events › downloading
general info specification offline interface event bubbles no cancelable no target applicationcache default action none properties property type description target eventtarget (dom element) the event target (the topmost target in the dom tree).
error - Archive of obsolete content
Archive › Events › error (appcache event)
general info specification offline interface event bubbles no cancelable no target applicationcache default action none properties property type description target eventtarget (dom element) the event target (the topmost target in the dom tree).
noupdate - Archive of obsolete content
Archive › Events › noupdate
general info specification offline interface event bubbles no cancelable no target applicationcache default action none properties property type description target eventtarget (dom element) the event target (the topmost target in the dom tree).
obsolete - Archive of obsolete content
Archive › Events › obsolete
general info specification offline interface event bubbles no cancelable no target applicationcache default action none properties property type description target eventtarget (dom element) the event target (the topmost target in the dom tree).
progress - Archive of obsolete content
Archive › Events › progress
general info specification offline interface progressevent bubbles no cancelable no target applicationcache default action none properties property type description target eventtarget (dom element) the event target (the topmost target in the dom tree).
updateready - Archive of obsolete content
Archive › Events › updateready
general info specification offline interface event bubbles no cancelable no target applicationcache default action none properties property type description target eventtarget (dom element) the event target (the topmost target in the dom tree).
Creating a Web based tone generator - Archive of obsolete content
Archive › Misc top level › Creating a Web based tone generator
selected } var k = 2* math.pi * frequency / samplerate; for (var i=0, size=sounddata.length; i<size; i++) { sounddata[i] = math.sin(k * currentsoundsample++); } } var audiodestination = new audiodatadestination(samplerate, requestsounddata); function start() { currentsoundsample = 0; frequency = parsefloat(document.getelementbyid("freq").value); } function stop() { frequency = 0; } </script> </body> </html> ...
Monitoring WiFi access points - Archive of obsolete content
Archive › Misc top level › Monitoring WiFi access points
<html> <head> <title>wifi monitor example</title> <script> var count = 0; function test() { } test.prototype = { onchange: function (accesspoints) { netscape.security.privilegemanager.enableprivilege('universalxpconnect'); var d = document.getelementbyid("d"); d.innerhtml = ""; for (var i=0; i<accesspoints.length; i++) { var a = accesspoints[i]; d.innerhtml += "<p>" + a.mac + " " + a.ssid + " " + a.signal + "</p>"; } var c = document.getelementbyid("c"); c.innerhtml = "<p>" + count++ + "</p>"; }, onerror: function (value) { alert("error: " +value); }, queryinterface: function(iid) { ne...
ActiveX Control for Hosting Netscape Plug-ins in IE - Archive of obsolete content
Archive › Mozilla › ActiveX Control for Hosting Netscape Plug-ins in IE
you may also supply any custom plug-in parameters as additional <param> elements.
Kill the XUL.mfl file for good - Archive of obsolete content
Archive › Mozilla › Automatic Mozilla Configurator › Kill the XUL.mfl file for good
avoiding the creation of the xul.mfl file mozilla creates in its profile directory a file named xul.mfl, which contains pre-compiled ui elements.
Automatically Handle Failed Asserts in Debug Builds - Archive of obsolete content
Archive › Mozilla › Automatically Handle Failed Asserts in Debug Builds
as an example, consider the following failed assertion: assertion: no document: 'mdocument != nsnull', file d:/cvs-1.11.4/mozilla/content/xul/content/src/nsxulelement.cpp, line 3173 (note that i have my source tree in d:/cvs-1.11.4/mozilla) if you have a dword in hkcu\software\mozilla.org\windbgdlg\ named "d:/cvs-1.11.5/mozilla/content/xul/content/src/nsxulelement.cpp," (with the comma - matches are whole-word only) and value 0x5, the assert would automatically be ignored.
Enabling the behavior - updating the status bar panel - Archive of obsolete content
Archive › Mozilla › Creating a Mozilla extension › Enabling the behavior - updating the status bar panel
function updatetinderboxstatus() { var icon = document.getelementbyid('tinderbox-status'); if (gxmlhttprequest.responsetext.match("ee0000")) icon.setattribute("status", "busted"); else if (gxmlhttprequest.responsetext.match("ffaa00")) icon.setattribute("status", "testfailed"); else if (gxmlhttprequest.responsetext.match("11dd11")) icon.setattribute("status", "success"); else icon.setattribute("status", ""); } updatetinderboxstatus() retrieves a reference to the statusbarpanel element then searches through the retrieved html document (stored in the responsetext property of the xmlhttprequest instance) for one of several color references.
Finding the file to modify - Archive of obsolete content
Archive › Mozilla › Creating a Mozilla extension › Finding the file to modify
it contains elements for all common ui widgets (menus, buttons, toolbars, etc.) and many sophisticated ones (trees, browsers, color pickers).
Dehydra Object Reference - Archive of obsolete content
Archive › Mozilla › Dehydra › Object Reference
pointer and reference types property type description .ispointer boolean flag .isreference boolean flag .type type object the type this points to or references array type property type description .isarray boolean flag .max integer or normal fixed-size arrays, the index of the largest element of the array.
Developing New Mozilla Features - Archive of obsolete content
Archive › Mozilla › Developing New Mozilla Features
try hard to design your feature so that it can be implemented and reviewed in manageable size patches if you can implement and submit core elements first and build on them in subsequent patches, so much the better.
Download Manager preferences - Archive of obsolete content
Archive › Mozilla › Download Manager preferences
browser.download.manager.flashcount indicates the number of times the appropriate user interface element should be "flashed" to get the user's attention when a download completes.
Embedding FAQ - Archive of obsolete content
Archive › Mozilla › Embedding FAQ
you can get more detailed information on what interfaces are required and which are optional to impelement here.
Documentation for BiDi Mozilla - Archive of obsolete content
Archive › Mozilla › Firefox › Documentation for BiDi Mozilla
this is determined in nstextfragment::setto the page includes a element with the attribute dir=rtl, either explicitly (nsgenerichtmlelement::mapcommonattributesinto), or as a consequence of a style rule (mapdeclarationtextinto in nscssstylerule.cpp) all these cases use nsdocument::enablebidi to set the flag mbidienabled.
Layout FAQ - Archive of obsolete content
Archive › Mozilla › Firefox › Layout FAQ
,600} [state=00000010] sc=035ff264(i=2,b=0)< line 035ffc18: count=1 state=inline,clean,prevmarginclean,not impacted,not wrapped,before:nobr,after:linebr[0x5100] {0,0,330,300} < inline(span)(0)@035ffa04 next=035ffc48 next-continuation=035ffc48 {0,7,330,285} [content=0359ed50] [sc=035ff990]< text(0)@035ffa8c[0,4,t] next=035ffb1c {0,0,330,285} [state=41600020] sc=035ffa3c pst=:-moz-non-element< "\nabc" > frame(br)(1)@035ffb1c {330,225,0,0} [state=00000020] [content=035aebf0] > > the linebox is used to contain everything on a single line: example how do you fix inconsistent float behavior in firefox involving a two column layout using display:table and floating div elements?
UI - Archive of obsolete content
Archive › Mozilla › Jetpack › UI
menu accessing, modifying, and creating menus in the browser slidebar ui mechanism for displaying jetpack content in a slide-out animated vertical column toolbar including entries and access elements into the toolbar panel a movable, expandable, and custom styled content element to display jetpack content tabs adding events and interacting with browser tabs and their contained documents statusbar low-level functions and basic calls notifications a system for alerting users via provided ui mechanisms selection interacting w...
Microsummary topics - Archive of obsolete content
Archive › Mozilla › Microsummary topics
when programmatically installing generators, you should specify a unique identifier for the generator in the uri attribute of the <generator> element.
Modularization techniques - Archive of obsolete content
Archive › Mozilla › Modularization Techniques
in house equivalents to the important elements of this technology will be developed as needed.
Plugin Architecture - Archive of obsolete content
Archive › Mozilla › Plugin architecture
sequence of events in content a content node for a plugin dom element gets created in bindtotree (usually) or another function, it calls loadobject loadobject either notices directly that it is dealing with a plugin, or it starts a network request and notices this in onstartrequest when it realizes that, it tries to create a frame, if anotify is true and no frame exists yet if a frame exists now, it is asked to instantiate the plugin that was the normal case.
FAQ - Archive of obsolete content
Archive › Mozilla › Prism › FAQ
prism is a simple xulrunner application with the main portion of the ui consisting of a xul <browser> element.
Prism - Archive of obsolete content
Archive › Mozilla › Prism
web apps can also point to a complete web app bundle or some elements of a web app (like higher resolution icons).
Same origin policy for XBL - Archive of obsolete content
Archive › Mozilla › Same origin policy for XBL
for inline stylesheets (<style> and style attributes), the principal of the element node involved (meaning the <style> element or the element whose style attribute is being looked at).
Space Manager Detailed Design - Archive of obsolete content
Archive › Mozilla › Space Manager Detailed Design
the primary goal of the space manager is to provide information about those bands of space to support the css notion of floated elements.
Tamarin build documentation - Archive of obsolete content
Archive › Mozilla › Tamarin › Tamarin Build Documentation
preparing your eclipse workspace and perspective open the c/c++ perspective open the 'c/c++ projects' view (window >> show view >> c/c++ projects) add view filter 'non-c elements' (in the top-right of the 'c/c++ projects' view, click the down-arrow, click 'filters...', check 'non-c elements') increase the threshold for 'editor scalability mode' to 20000 lines.
URIs and URLs - Archive of obsolete content
Archive › Mozilla › URIs and URLs
registry-based authoritys as defined in rfc 2396 many uri schemes include a top hierarchical element for a naming authority, such that the namespace defined by the remainder of the uri is governed by that authority.
Venkman Internals - Archive of obsolete content
Archive › Mozilla › Venkman › Internals
to obtain the antecedent files: doc.getelementsbytagname("script"); then extract the urls from the src attributes.
Venkman Introduction - Archive of obsolete content
Archive › Mozilla › Venkman › Introduction
this quick stop mode reflects a common scenario in javascript debugging, which is to inspect and debug scripts while they are running, as on a page where elements are moved around dynamically with dhtml.
Creating XPI Installer Modules - Archive of obsolete content
Archive › Mozilla › XPInstall › Creating XPI installer modules
the barley package the barley package is a simple xul window with a couple of buttons and an image element.
Mozilla E4X - Archive of obsolete content
Archive › Mozilla › XTech 2005 Presentations › Mozilla E4X
e4x marries xml and javascript syntax, and extends javascript to include namespaces, qualified names, and xml elements and lists.
SVG And Canvas In Mozilla - Archive of obsolete content
Archive › Mozilla › XTech 2005 Presentations › Rich Web › SVG And Canvas In Mozilla
the mozilla project will meet this challenge with two major new features to be delivered in firefox 1.5: integrated svg and a new canvas html element.
browserid - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › Browserid
« xul reference home browserid type: string the id of the browser element to which the findbar is attached.
accessible - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › accessible
« xul reference home accessible type: nsiaccessible returns the accessibility object for the element.
allownegativeassertions - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › allownegativeassertions
« xul reference home allownegativeassertions type: boolean valid on any element that has a datasources attribute.
bottom - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › bottom
« xul reference home bottom type: string (representing an integer) for elements placed directly within a stack, specifies the pixel position of the bottom edge of the element relative to the bottom edge of the stack.
checkState - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › checkState
constants for the possible values for this attribute are in the nsidomxulbuttonelement interface.
checked - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › checked
« xul reference home checked type: boolean indicates whether the element is checked or not.
class - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › class
« xul reference home class type: string the style class of the element.
coalesceduplicatearcs - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › coalesceduplicatearcs
« xul reference home coalesceduplicatearcs type: boolean valid on any element that has a datasources attribute.
collapsed - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › collapsed
« xul reference home collapsed type: boolean if true, then the element is collapsed and does not appear.
container - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › container
« xul reference home container type: boolean set to true if the element is to act as a container which can have child elements.
containment - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › containment
this attribute should be placed on the same element that the datasources and the ref attribute is on.
contentcontextmenu - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › contentcontextmenu
« xul reference home contentcontextmenu type: id the id of a menupopup element serving as the context menu for the content area in the tabbrowser.
contenttooltip - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › contenttooltip
« xul reference home contenttooltip type: id the id of a tooltip element to be used for the content area in the tabbrowser.
disableKeyNavigation - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › disableKeyNavigation
« xul reference home disablekeynavigation type: boolean if this attribute is not used, the user can navigate to specific items within the element by pressing keys corresponding to letters in the item's label.
disablefastfind - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › disablefastfind
« xul reference homedisablefastfindtype: booleanput disablefastfind="true" on the root element of a xul document, which is intended to be loaded in a tab, to disable the find bar for the tab with this document.
drawintitlebar - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › drawintitlebar
this is supported only from window elements, and is ignored on platforms that don't support drawing into the title bar.
droppedLinkHandler - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › droppedLinkHandler
« xul reference home droppedlinkhandler type: function this function is called when links are dropped to the browser element, with the following arguments.
empty - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › empty
« xul reference home empty type: boolean set to true if the element is a container that contains no children.
events - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › events
focus: occurs when the focused element changes.
expr - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › expr
any namespace prefixes declared on the element may be used within the expression.
flags - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › flags
dont-build-content: this flag may be used on a tree to indicate that content elements should not be generated.
focused - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › focused
« xul reference home focused type: boolean this attribute is true if the element is focused.
hidden - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › hidden
« xul reference home hidden type: boolean if set to true, the element is not displayed.
homepage - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › homepage
« xul reference home homepage type: url this attribute allows you to set a homepage for the browser element.
href - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › href
« xul reference home href type: string defines a url to open when this element is clicked.
insertafter - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › insertafter
« xul reference home insertafter type: id when an element is in an overlay, the insertafter attribute specifies the id of the element in the base window that the element should appear after.
insertbefore - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › insertbefore
« xul reference home insertbefore type: id when an element is in an overlay, the insertbefore attribute specifies the id of the element in the base window that the element should appear before.
inverted - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › inverted
« xul reference home inverted type: boolean for boolean preferences, if this attribute is set to true, it indicates that the value of the preference is the reverse of the user interface element attached to it.
keytext - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › keytext
this text would appear next to a menuitem label if that menuitem is associated with the key element via its key attribute.
left - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › left
« xul reference home left type: string (representing an integer) for elements placed directly within a stack, specifies the pixel position of the left edge of the element relative to the left edge of the stack.
lightweightthemesfooter - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › lightweightthemesfooter
« xul reference home lightweightthemesfooter type: id specifies the id of an element to which a lightweight theme's footer image will be applied.
maxheight - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › maxheight
« xul reference home maxheight type: string (representing an integer) the maximum height of the element.
maxwidth - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › maxwidth
« xul reference home maxwidth type: string (representing an integer) the maximum width of the element.
menuitem.key - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › menuitem.key
« xul reference home key type: id set to the id of a key element whose key shortcut is displayed in the menuitem.
minheight - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › minheight
« xul reference home minheight type: string (representing an integer) the minimum height of the element.
minwidth - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › minwidth
« xul reference home minwidth type: string (representing an integer) the minimum width of the element.
noautofocus - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › noautofocus
« xul reference home noautofocus type: boolean if false, the default value, the currently focused element will be unfocused whenever the popup is opened or closed.
noautohide - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › noautohide
if this attribute is set to true, this will not happen and the tooltip will only hide when the user moves the mouse to another element.
object - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › object
« xul reference home object type: string the object of the element.
observes - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › observes
« xul reference home observes type: id set to an id of a broadcaster element that is being observed by the element.
onchange - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › onchange
a change event is fired in different ways for different xul input elements as listed below: onchange type: script code textbox when enter key is pressed radio/check box when the state is changed select list when the selected item is changed what is accessible the script context at this point can only access the following things: global values/functions i.e.
onclick - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › onclick
example <image src="hello.png" onclick="alert('hi')"/> see also click dom element ...
oncommand - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › oncommand
example 1: in-line code <button label="click me" oncommand="alert('hi')"/> example 2: function with source argument <button label="click me" oncommand="dosomeprocessing(event.target)"/> and here is the definition of the function: function dosomeprocessing(source) { alert("source: " + source); return true; } see also command element ...
onerror - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › onerror
« xul reference home onerror type: script code this event is sent to an image element when an error occurs loading the image.
oninput - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › oninput
--> <script language="javascript"> function setlabel(txtbox){ document.getelementbyid('lbl').value = txtbox.value; } </script> <label id="lbl"/> <textbox oninput="setlabel(this);"/> this is similar to the onkeypress event used in html documents.
parent - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › parent
« xul reference home parent type: element tag name if set, the rule will only match the corresponding tag.
persist - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › persist
in order for persistence to work, the element must also have an id.
phase - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › phase
this should be set to the value capturing to indicate during the event capturing phase or target to indicate at the target element or left out entirely for the bubbling phase.
pinned - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › pinned
the tabbrowser element's pintab and unpintab methods handle pinning and unpinning tabs.
popup.position - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › popup.position
« xul reference home position type: string the position attribute determines where the popup appears relative to the element the user clicked to invoke the popup.
popupalign - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › popupalign
noneno aligntopleftalign to the top left cornertoprightalign to the top right cornerbottomleftalign to the bottom left cornerbottomrightalign to the bottom right cornersyntax<element popupalign="none | topleft | topright | bottomleft | bottomright"/> example<element id="edit-context" popup="editor-popup" popupanchor="topleft" popupalign="bottomright"/> notesthe popupalign attribute can be used to specify which corner of the popup content is tied to the originating point.
preference - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › preference
« xul reference home preference type: id connects the element to a corresponding preference.
prefpane.src - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › prefpane.src
if this is not specified, the contents of the prefpane element is used.
prefwindow.onload - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › prefwindow.onload
« xul reference home prefwindow.onload type: script code when a window finishes loading, it calls this event handler on the prefwindow element.
properties - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › properties
« xul reference home properties type: space-separated list of property names sets the properties of the element, which can be used to style the element.
readonly - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › readonly
« xul reference home readonly type: boolean if set to true, then the user cannot change the value of the element.
ref - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › ref
« xul reference home ref type: uri for template-generated elements, this attribute is used to specify the root rdf node where content generation begins.
reserved - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › reserved
« xul reference home reserved type: string this attribute applies to a command element.
resizer.type - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › resizer.type
as some platforms provide this resizing grip automatically, this type of resizer element will be hidden and ensure that the window does not get an extra resizer.
sizemode - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › sizemode
issues with this attribute (at least on firefox 3): sizemode is only updated when the value of the persist attribute on the root element (such as <window>) contains sizemode.
sortResource - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › sortResource
place this attribute on the same element as the datasources attribute.
src - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › src
« xul reference home src type: uri the uri of the content to appear in the element.
statusbar - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › statusbar
« xul reference home statusbar type: id if you set this attribute to the id of a statusbar element, the label on the statusbar will update to the statustext of the items on the menu as the user moves the mouse over them.
style - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › style
« xul reference home style type: css inline style css style rules to be applied to the element.
subject - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › subject
« xul reference home subject type: string the subject of the element.
tabscrolling - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › tabScrolling
if false, the default, the tab key moves the focus to the next element.
tabs.onselect - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › tabs.onselect
« xul reference home onselect type: script code this event is sent to the tabs element when this tab is changed.
textbox.crop - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › textbox.crop
« xul reference home crop type: boolean this attribute is not used and is only provided for compatibility with the menulist element.
textbox.onchange - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › textbox.onchange
the event is not sent until the focus is moved to another element.
textbox.tabScrolling - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › textbox.tabScrolling
if false, the default, the tab key moves the focus to the next element.as of gecko 1.9.1, this attribute is now always specified in lower case.
toolbarbutton.type - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › toolbarbutton.type
place a menupopup element inside the button in this case.
top - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › top
« xul reference home top type: string (representing an integer) for elements placed directly within a stack, specifies the pixel position of the top edge of the element relative to the top edge of the stack.
treecol.editable - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › treecol.editable
individual treecell elements in the column may be marked editable="false" in order to disable editing.
treeitem.label - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › treeitem.label
« xul reference home label tipo: string (concatenación de caracteres) para un árbol tree con columnas simples, la etiqueta puede ser colocada directamnete sobre el elemeto "treeitem" sin la necesidad de una fila "row" y un elemento "treeitem" dentro.
onunload - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › unload
« xul reference home onunload type: script code closing the window calls this event handler on the prefwindow element.
visuallyselected - Archive of obsolete content
Archive › Mozilla › XUL › Attribute › visuallyselected
to change the selection, set either the selectedindex or selecteditem property of the containing element.
DOMMenuItemActive - Archive of obsolete content
Archive › Mozilla › XUL › Events › DOMMenuItemActive
general info specification xul interface event bubbles yes cancelable yes target element default action none properties property type description target read only eventtarget the event target (the topmost target in the dom tree).
DOMMenuItemInactive - Archive of obsolete content
Archive › Mozilla › XUL › Events › DOMMenuItemInactive
general info specification xul interface event bubbles yes cancelable yes target element default action none properties property type description target read only eventtarget the event target (the topmost target in the dom tree).
close - Archive of obsolete content
Archive › Mozilla › XUL › Events › close event
if an event handler is placed on the window element, it can be prevented to close (see example below).
commandupdate - Archive of obsolete content
Archive › Mozilla › XUL › Events › commandupdate
general info specification xul interface event bubbles no cancelable no target element default action none.
popuphidden - Archive of obsolete content
Archive › Mozilla › XUL › Events › popuphidden
general info specification xul interface popupevent bubbles yes cancelable yes target element default action none properties property type description target read only eventtarget the event target (the topmost target in the dom tree).
popuphiding - Archive of obsolete content
Archive › Mozilla › XUL › Events › popuphiding
general info specification xul interface popupevent bubbles yes cancelable yes target element default action none properties property type description target read only eventtarget the event target (the topmost target in the dom tree).
popupshowing - Archive of obsolete content
Archive › Mozilla › XUL › Events › popupshowing
general info specification xul interface popupevent bubbles yes cancelable yes target element default action a popup is displayed properties property type description target read only eventtarget the event target (the topmost target in the dom tree).
popupshown - Archive of obsolete content
Archive › Mozilla › XUL › Events › popupshown
general info specification xul interface popupevent bubbles yes cancelable yes target element default action none properties property type description target read only eventtarget the event target (the topmost target in the dom tree).
Reading from Files - Archive of obsolete content
Archive › Mozilla › XUL › FileGuide › FileReading
unlike with the other reading methods that read a string, the readbytearray method returns an array where each element is a byte of data from the file.
Uploading and Downloading Files - Archive of obsolete content
Archive › Mozilla › XUL › FileGuide › FileUpDown
this is done by using an html <input> element using the file type from within a form.
Writing to Files - Archive of obsolete content
Archive › Mozilla › XUL › FileGuide › FileWriting
this method takes an array of values and writes them all in sequence, where each element in the array is written as one byte.
International characters in XUL JavaScript - Archive of obsolete content
Archive › Mozilla › XUL › International characters in XUL JavaScript
however, you can use unicode escapes – the earlier example rewritten using them would be: var text = "ein sch\u00f6nes beispiel eines mehrsprachigen textes: \u65e5\u672c\u8a9e"; an alternative might be to use property files via nsistringbundle or the xul <stringbundle> element; this would allow for localization of the xul.
addTab - Archive of obsolete content
Archive › Mozilla › XUL › Method › addTab
}) return type: tab element opens a new tab that loads a page with the specified url.
click - Archive of obsolete content
Archive › Mozilla › XUL › Method › click
« xul reference home click() return type: no return value calls the onclick handler for the element.
doCommand - Archive of obsolete content
Archive › Mozilla › XUL › Method › doCommand
« xul reference home docommand() return type: no return value executes the command event for the element.
focus - Archive of obsolete content
Archive › Mozilla › XUL › Method › focus
« xul reference home focus() return type: no return value assigns the focus to the element, if it can accept the focus.
getBrowserAtIndex - Archive of obsolete content
Archive › Mozilla › XUL › Method › getBrowserAtIndex
« xul reference home getbrowseratindex( index ) return type: browser element returns a browser at the specified tab index.
getBrowserForDocument - Archive of obsolete content
Archive › Mozilla › XUL › Method › getBrowserForDocument
« xul reference home getbrowserfordocument( document ) return type: browser element returns a browser for the specified document.
getBrowserForTab - Archive of obsolete content
Archive › Mozilla › XUL › Method › getBrowserForTab
« xul reference home getbrowserfortab( tab ) return type: browser element returns a browser for the specified tab element.
getButton - Archive of obsolete content
Archive › Mozilla › XUL › Method › getButton
« xul reference home getbutton( type ) return type: button element returns the button element in the dialog corresponding to the given type.
getFormattedString - Archive of obsolete content
Archive › Mozilla › XUL › Method › getFormattedString
« xul reference home getformattedstring( key, strarray ) return type: string looks up the format string for the given key name in the string bundle and returns a formatted copy where each occurrence of %s (uppercase) is replaced by each successive element in the supplied array.
getItemAtIndex - Archive of obsolete content
Archive › Mozilla › XUL › Method › getItemAtIndex
« xul reference home getitematindex( index ) return type: element returns the element that is at the specified index.
getNextItem - Archive of obsolete content
Archive › Mozilla › XUL › Method › getNextItem
« xul reference home getnextitem( startitem, delta ) return type: element this method returns the item a given distance (delta) after the specified startitem, or null if no such item exists.
getNotificationBox - Archive of obsolete content
Archive › Mozilla › XUL › Method › getNotificationBox
« xul reference home getnotificationbox( browser ) return type: notificationbox element returns a notificationbox for the specified browser element.
getNotificationWithValue - Archive of obsolete content
Archive › Mozilla › XUL › Method › getNotificationWithValue
« xul reference home getnotificationwithvalue( value ) return type: notification element retrieve the notification with a particular value.
getPageById - Archive of obsolete content
Archive › Mozilla › XUL › Method › getPageById
« xul reference home getpagebyid( pageid ) return type: wizardpage element returns the wizardpage element corresponding to the specified pageid.
getPreviousItem - Archive of obsolete content
Archive › Mozilla › XUL › Method › getPreviousItem
« xul reference home getpreviousitem( startitem, delta ) return type: element this method returns the item a given distance (delta) before the specified startitem, or null if no such item exists.
getRowCount - Archive of obsolete content
Archive › Mozilla › XUL › Method › getRowCount
« xul reference home getrowcount() return type: integer returns the total number of rows in the element, regardless of how many rows are displayed.
getSelectedItem - Archive of obsolete content
Archive › Mozilla › XUL › Method › getSelectedItem
« xul reference home getselecteditem( index ) return type: element when multiple items are selected, you can retrieve each selected item using this method.
loadOneTab - Archive of obsolete content
Archive › Mozilla › XUL › Method › loadOneTab
}) return type: tab element opens a new tab that loads a page with the specified url.
menulist.appendItem - Archive of obsolete content
Archive › Mozilla › XUL › Method › menulist.appendItem
« xul reference home appenditem( label, value, description ) return type: element creates a new menuitem element and adds it to the end of the menulist.
moveTabTo - Archive of obsolete content
Archive › Mozilla › XUL › Method › moveTabTo
« xul reference home movetabto(tab, index) return type: tab element tries to moves an existing tab to a given index.
pinTab - Archive of obsolete content
Archive › Mozilla › XUL › Method › pinTab
« xul reference home pintab( tabelement ) return type: no return value pins the specified tab element as an app tab.
reload - Archive of obsolete content
Archive › Mozilla › XUL › Method › reload
« xul reference home reload() return type: no return value reloads the document in the browser element on which you call this method.
removeAllTabsBut - Archive of obsolete content
Archive › Mozilla › XUL › Method › removeAllTabsBut
« xul reference home removealltabsbut( tabelement ) return type: no return value removes all of the tab panels except for the one corresponding to the specified tab.
removeCurrentTab - Archive of obsolete content
Archive › Mozilla › XUL › Method › removeCurrentTab
« xul reference home removecurrenttab() return type: tab element removes the currently displayed tab page.
removeNotification - Archive of obsolete content
Archive › Mozilla › XUL › Method › removeNotification
« xul reference home removenotification( item ) return type: element remove a notification, displaying the next one if the removed item is the current one.
removeTab - Archive of obsolete content
Archive › Mozilla › XUL › Method › removeTab
« xul reference home removetab( tabelement ) return type: no return value removes a specific tabbed page corresponding to the given tab element.
scrollByIndex - Archive of obsolete content
Archive › Mozilla › XUL › Method › scrollByIndex
a line is a single element.
scrollToIndex - Archive of obsolete content
Archive › Mozilla › XUL › Method › scrollToIndex
« xul reference home scrolltoindex( index ) return type: no return value scrolls the element to the specified index.
syncSessions - Archive of obsolete content
Archive › Mozilla › XUL › Method › syncSessions
« xul reference home syncsessions( autocompleteelement ) obsolete since gecko 26 return type: void copy the sessions from another autocomplete element.
unpinTab - Archive of obsolete content
Archive › Mozilla › XUL › Method › unpinTab
« xul reference home unpintab( tabelement ) return type: no return value unpins the specified tab element, making it no longer an app tab.
Node - Archive of obsolete content
Archive › Mozilla › XUL › Node
for more information on this interface please see dom-level-2-core short element_node 1 short attribute_node 2 short text_node 3 short cdata_section_node 4 short entity_reference_node 5 short entity_node 6 short processing_instruction_node 7 short comment_node 8 short document_node 9 short document_type_node 10 short document_fragment_node 11 short notation_node 12 methods node appendchild ( node newchild ) node clonenode ( boolean deep ) boolean hasattributes ( ) boolean haschildnodes ( ) node insertbefore ( node newchild , nod...
Other Resources - Archive of obsolete content
Archive › Mozilla › XUL › Other Resources
links creating applications with mozilla xul periodic table online example of nearly every xul element.
MoveResize - Archive of obsolete content
Archive › Mozilla › XUL › PopupGuide › MoveResize
for instance, the following example will move a popup to the upper left corner of the screen: popup.moveto(0, 0); the position may be shifted so as not to cover user interface elements provided by the operating system, such as the menu bar or the task bar.
browser - Archive of obsolete content
Archive › Mozilla › XUL › Property › Browser
« xul reference browser type: browser element lets you set and get the browser in which the findbar is located.
accessible - Archive of obsolete content
Archive › Mozilla › XUL › Property › accessible
« xul reference accessible type: nsiaccessible returns the accessibility object for the element.
accessibleType - Archive of obsolete content
Archive › Mozilla › XUL › Property › accessibleType
« xul reference accessibletype type: integer a value indicating the type of accessibility object for the element.
anchorNode - Archive of obsolete content
Archive › Mozilla › XUL › Property › anchorNode
« xul reference anchornode type: nsidomelement this read-only property holds the dom node that was specified as the anchor when opening the popup.
browsers - Archive of obsolete content
Archive › Mozilla › XUL › Property › browsers
« xul reference browsers type: nodelist of browser elements holds a list of the browser elements inside the tabbrowser.
child - Archive of obsolete content
Archive › Mozilla › XUL › Property › child
a variable reference to a node that is expected to be a child of the element that is referred to by the container element.
children - Archive of obsolete content
Archive › Mozilla › XUL › Property › children
« xul reference children type: array of elements returns the list of items in the richlistbox.
command - Archive of obsolete content
Archive › Mozilla › XUL › Property › command
« xul reference command type: element id gets and sets the value of the command attribute.
container - Archive of obsolete content
Archive › Mozilla › XUL › Property › container
if the variable is the same as the uri attribute on the content element, the resource must be a container element in order to match.
contentDocument - Archive of obsolete content
Archive › Mozilla › XUL › Property › contentDocument
« xul reference contentdocument type: document this read-only property contains the document object in the element.
contentView - Archive of obsolete content
Archive › Mozilla › XUL › Property › contentView
this interface lets you retrieve the dom element corresponding to a given a row index and vice versa.
contextMenu - Archive of obsolete content
Archive › Mozilla › XUL › Property › contextMenu
« xul reference contextmenu type: popup element id gets and sets the value of the contextmenu attribute.
control - Archive of obsolete content
Archive › Mozilla › XUL › Property › control
« xul reference control type: element id gets and sets the value of the control attribute.
controller - Archive of obsolete content
Archive › Mozilla › XUL › Property › controller
« xul reference controller type: nsiautocompletecontroller returns the controller for the auto complete element.
currentIndex - Archive of obsolete content
Archive › Mozilla › XUL › Property › currentIndex
<script language ="javascript"> function treerowclicked(){ var tree = document.getelementbyid("my-tree"); var selection = tree.view.selection; var celltext = tree.view.getcelltext(tree.currentindex, tree.columns.getcolumnat(0)); alert(celltext); } </script> <tree id="my-tree" seltype="single" onselect="treerowclicked()"> <treecols> <treecol label="title" flex="1"/><treecol label="url" flex="1"/> </treecols> <treechildren> <treeitem> <treerow> <...
currentItem - Archive of obsolete content
Archive › Mozilla › XUL › Property › currentItem
« xul reference currentitem type: listitem element returns the currently focused item in the list box, which is only useful in a multiple selection list box.
currentNotification - Archive of obsolete content
Archive › Mozilla › XUL › Property › currentNotification
« xul reference currentnotification type: notification element the currently displayed notification element or null.
currentPage - Archive of obsolete content
Archive › Mozilla › XUL › Property › currentPage
« xul reference currentpage type: wizardpage element this property returns the wizardpage element that is currently displayed.
currentPane - Archive of obsolete content
Archive › Mozilla › XUL › Property › currentPane
« xul reference currentpane type: prefpane element reference to the currently displayed pane.
disabled - Archive of obsolete content
Archive › Mozilla › XUL › Property › disabled
<!-- checkbox enables/disables the button --> <checkbox label="enable button" oncommand="document.getelementbyid('buttremove').disabled = !
editable - Archive of obsolete content
Archive › Mozilla › XUL › Property › editable
« xul reference editable type: boolean returns true if the element is editable.
externalToolbars - Archive of obsolete content
Archive › Mozilla › XUL › Property › externalToolbars
« xul reference externaltoolbars type: array of elements an array of external toolbars; that is, toolbar elements that should be considered to be members of this toolbox, even if they are not actually children of the toolbox.
firstOrdinalColumn - Archive of obsolete content
Archive › Mozilla › XUL › Property › firstOrdinalColumn
« xul reference firstordinalcolumn type: treecol element a reference to the first treecol element, which or may not be the first column displayed in the tree.
firstPermanentChild - Archive of obsolete content
Archive › Mozilla › XUL › Property › firstPermanentChild
« xul reference firstpermanentchild not in seamonkey 1.x type: element the first permanent child of the toolbar.
focusedItem - Archive of obsolete content
Archive › Mozilla › XUL › Property › focusedItem
« xul reference focuseditem type: radio element holds the currently focused item in the radiogroup, which may or may not be the same as the selected item.
id - Archive of obsolete content
Archive › Mozilla › XUL › Property › id
« xul reference id type: element id, must be unique in the window gets and sets the value of the id attribute.
itemCount - Archive of obsolete content
Archive › Mozilla › XUL › Property › itemCount
example var bucket = document.getelementbyid("attachmentbucket"); if(bucket.itemcount == 0) { dump("\n\n no attachments \n\n"); } else { dump("\n\n attachment exists \n\n"); } ...
lastPermanentChild - Archive of obsolete content
Archive › Mozilla › XUL › Property › lastPermanentChild
« xul reference lastpermanentchild not in seamonkey 1.x type: element the last permanent child of the toolbar.
linkedPanel - Archive of obsolete content
Archive › Mozilla › XUL › Property › linkedPanel
« xul reference linkedpanel type: id of a tabpanel element gets and sets the value of the linkedpanel attribute.
maxWidth - Archive of obsolete content
Archive › Mozilla › XUL › Property › maxWidth
note: prior to gecko 6.0, you could use this on <input> elements; this was never intended, was a violation of the html specification, and has been fixed.
menu - Archive of obsolete content
Archive › Mozilla › XUL › Property › menu
« xul reference menu type: popup element id gets and sets the value of the menu attribute.
menuitem.control - Archive of obsolete content
Archive › Mozilla › XUL › Property › menuitem.control
« xul reference control type: menu element returns the enclosing menu that the item is inside, if any, or null if there is no enclosing menu.
menulist.inputField - Archive of obsolete content
Archive › Mozilla › XUL › Property › menulist.inputField
« xul reference inputfield type: textbox element a reference to the textbox element used for editable menu lists.
menupopup - Archive of obsolete content
Archive › Mozilla › XUL › Property › menupopup
« xul reference menupopup type: menupopup element a reference to the menupopup used by the menu or menulist.
object - Archive of obsolete content
Archive › Mozilla › XUL › Property › object
« xul reference object type: string the object of the element.
observes - Archive of obsolete content
Archive › Mozilla › XUL › Property › observes
« xul reference observes type: broadcaster element id gets and sets the value of the observes attribute.
palette - Archive of obsolete content
Archive › Mozilla › XUL › Property › palette
« xul reference palette firefox only type: element the toolbarpalette within the toolbox.
parentContainer - Archive of obsolete content
Archive › Mozilla › XUL › Property › parentContainer
« xul reference parentcontainer type: menu element read only property that returns the containing menu element, or null if there isn't a containing menu.
popup - Archive of obsolete content
Archive › Mozilla › XUL › Property › popup
« xul reference popup new in thunderbird 14 requires seamonkey 2.11 type: popup element should be set to the popup element that should appear when the user clicks on the textbox.
preference.preferences - Archive of obsolete content
Archive › Mozilla › XUL › Property › preference.preferences
« xul reference preferences type: element reference to the containing preferences element.
preferencePanes - Archive of obsolete content
Archive › Mozilla › XUL › Property › preferencePanes
« xul reference preferencepanes type: dom nodelist holds a list of all the prefpane elements in the window.
prefpane.preferences - Archive of obsolete content
Archive › Mozilla › XUL › Property › prefpane.preferences
« xul reference preferences type: dom nodelist holds a list of the preference elements in the pane.
radio.control - Archive of obsolete content
Archive › Mozilla › XUL › Property › radio.control
« xul reference control type: radiogroup element returns the enclosing radiogroup that the radio element is contained within, which may or may not be its direct parent.
radioGroup - Archive of obsolete content
Archive › Mozilla › XUL › Property › radioGroup
« xul reference radiogroup type: radiogroup element equivalent to the control property.
readOnly - Archive of obsolete content
Archive › Mozilla › XUL › Property › readOnly
« xul reference readonly type: boolean if set to true, then the user cannot modify the value of the element.
resource - Archive of obsolete content
Archive › Mozilla › XUL › Property › resource
« xul reference resource type: nsirdfresource returns an rdf resource with the value of the element's ref attribute.
resultsPopup - Archive of obsolete content
Archive › Mozilla › XUL › Property › resultsPopup
« xul reference resultspopup type: popup element this property is set to the popup element that displays the results.
selectedBrowser - Archive of obsolete content
Archive › Mozilla › XUL › Property › selectedBrowser
« xul reference selectedbrowser type: browser element this read-only property returns the currently displayed browser element.
selectedItem - Archive of obsolete content
Archive › Mozilla › XUL › Property › selectedItem
« xul reference selecteditem type: element holds the currently selected item.
selectedPanel - Archive of obsolete content
Archive › Mozilla › XUL › Property › selectedPanel
« xul reference selectedpanel type: element holds a reference to the currently selected panel within a <tabbox> element.
selectedTab - Archive of obsolete content
Archive › Mozilla › XUL › Property › selectedTab
« xul reference selectedtab type: tab element a reference to the currently selected tab, which will always be one of the tab elements in the tabs element.
spinButtons - Archive of obsolete content
Archive › Mozilla › XUL › Property › spinButtons
« xul reference spinbuttons type: element the read-only property returns a reference to the spinbuttons element used by the number box.
statusbar - Archive of obsolete content
Archive › Mozilla › XUL › Property › statusbar
« xul reference statusbar type: id of statusbar element gets and sets the value of the statusbar attribute.
strings - Archive of obsolete content
Archive › Mozilla › XUL › Property › strings
the enumeration contains nsipropertyelement objects.
subject - Archive of obsolete content
Archive › Mozilla › XUL › Property › subject
« xul reference subject type: string the subject of the element.
tab.control - Archive of obsolete content
Archive › Mozilla › XUL › Property › tab.control
« xul reference control type: tabs element returns the enclosing tabs element.
tabContainer - Archive of obsolete content
Archive › Mozilla › XUL › Property › tabContainer
« xul reference tabcontainer type: tabs element returns the tabs element that contains the tabs.
tabbox - Archive of obsolete content
Archive › Mozilla › XUL › Property › tabbox
« xul reference tabbox type: tabbox element returns the tabbox element that contains the tabs.
tabbox.tabs - Archive of obsolete content
Archive › Mozilla › XUL › Property › tabbox.tabs
« xul reference tabs type: tabs element the tabs element contained within the tabbox.
tabpanels - Archive of obsolete content
Archive › Mozilla › XUL › Property › tabpanels
« xul reference tabpanels type: tabpanels element the tabpanels element contained within the tabbox.
tabs - Archive of obsolete content
Archive › Mozilla › XUL › Property › tabs
« xul reference tabs type: tabs element the tabs element that the tab is contained within.
toolbarset - Archive of obsolete content
Archive › Mozilla › XUL › Property › toolbarset
« xul reference toolbarset firefox only type: element the toolbarset within the toolbox.
tooltip - Archive of obsolete content
Archive › Mozilla › XUL › Property › tooltip
« xul reference tooltip type: tooltip element id gets and sets the value of the tooltip attribute.
tree.inputField - Archive of obsolete content
Archive › Mozilla › XUL › Property › tree.inputField
« xul reference home inputfield type: textbox element read-only property that holds the textbox that is used for editing.
value - Archive of obsolete content
Archive › Mozilla › XUL › Property › value
for textbox and user editable menulist elements, the contents, as visible to the user, are read and set using the textbox.value and menulist.value syntax.
webNavigation - Archive of obsolete content
Archive › Mozilla › XUL › Property › webNavigation
most of its methods are callable directly on the element itself, such as goback and goforward.
wizardPages - Archive of obsolete content
Archive › Mozilla › XUL › Property › wizardPages
« xul reference wizardpages type: dom nodelist of wizardpage elements this property holds the list of wizardpage elements in the wizard.
alert-icon - Archive of obsolete content
Archive › Mozilla › XUL › Style › alert-icon
this and the other icon classes may be used by image elements or other elements which can have an image.
plain - Archive of obsolete content
Archive › Mozilla › XUL › Style › plain
« xul reference home plain this class causes the element to be displayed with no border or margin.
statusbarpanel-menu-iconic - Archive of obsolete content
Archive › Mozilla › XUL › Style › statusbarpanel-menu-iconic
specify the image using the src attribute, and place a menupopup element inside the statusbarpanel.
tree-splitter - Archive of obsolete content
Archive › Mozilla › XUL › Style › tree-splitter
« xul reference home tree-splitter this splitter is intended to be used in tree columns (in-between treecol elements).
Containment Properties - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Containment Properties
the builder treats the predicate in the containment attribute as an indicator that an element is a container.
RDF Query Syntax - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › RDF Query Syntax
each statement is placed as a direct child of the <query> element within the template.
Result Generation - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Result Generation
query processing a query for an rdf datasource consists of a number of statements, placed as children of the query element.
Template and Tree Listeners - Archive of obsolete content
Archive › Mozilla › XUL › Template Guide › Template and Tree Listeners
in a content builder, it will return the element with the datasources attribute, which in the template builder is referred to as the root element.
Code Samples - Archive of obsolete content
Archive › Mozilla › XUL › Toolbars › Custom toolbar button › Code Samples
change the first line to specify the page that you want to open: const url = "http://www.mozilla.org/" document .getelementbyid("content") .webnavigation .loaduri(url, 0, null, null, null) if your button is in thunderbird or sunbird, use code like this to open a web page.
Complete - Archive of obsolete content
Archive › Mozilla › XUL › Toolbars › Custom toolbar button › Complete
when you press the button, the code in the xul element sends the text string to the extension's javascript code in allcustom.js.
Toolbar customization events - Archive of obsolete content
Archive › Mozilla › XUL › Toolbars › Toolbar customization events
you can look at the contents of that element and its children to determine what changes were made.
Toolbars - Archive of obsolete content
Archive › Mozilla › XUL › Toolbars
toolbars, implemented using the xul toolbar element, are containers for toolbar buttons and other user interface objects.
Cross Package Overlays - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Cross Package Overlays
it will just have a few elements for entering a filename and directory to search.
Localization - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › Localization
this line is typically placed just before the window element.
More Wizards - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › More Wizards
wizard example source <?xml version="1.0"?> <?xml-stylesheet href="chrome://global/skin/" type="text/css"?> <wizard id="thewizard" title="secret code wizard" xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"> <script> function checkcode(){ document.getelementbyid('thewizard').canadvance = (document.getelementbyid('secretcode').value == "cabbage"); } </script> <wizardpage onpageshow="checkcode(); return true;"> <label value="enter the secret code:"/> <textbox id="secretcode" onkeyup="checkcode();"/> </wizardpage> <wizardpage> <label value="that is the correct secret code."/> </wizardpage> </wizard> there is also a corre...
XBL Inheritance - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › XBL Inheritance
example 1 : source <binding id="textboxwithhttp" extends="chrome://global/content/bindings/textbox.xml#textbox"> <handlers> <handler event="keypress" keycode="vk_f4"> this.value="http://www"+value; </handler> </handlers> </binding> the xbl here extends from the xul textbox element.
XPCOM Interfaces - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial › XPCOM Interfaces
for example, there is a component for each menu, button and element.
XUL Tutorial - Archive of obsolete content
Archive › Mozilla › XUL › Tutorial
introduction introduction xul structure the chrome url manifest files simple elements creating a window adding buttons adding labels and images input controls numeric controls list controls progress meters adding html elements using spacers more button features the box model the box model element positioning box model details groupboxes adding more elements more layout elements stacks and decks stack positioning tabboxes grids content panels splitters toolbars and menus toolbars simple menu bars more menu features popup menus scrolling menus events and scripts adding event handl...
Using multiple DTDs - Archive of obsolete content
Archive › Mozilla › XUL › Using multiple DTDs
single dtd to make strings in your xul file localizable, you normally add a dtd declaration at the beginning of the file like this: <!doctype window system "chrome://myextension/locale/mainwindow.dtd"> where "window" is the local name of the document (root) element.
Using the standard theme - Archive of obsolete content
Archive › Mozilla › XUL › Using the standard theme
you can either provide a complete custom styling, but most of the time you also want to be able to reuse the standard theme (also called the "global skin") of the base application for non-custom elements, transparently with regard to which theme the user has currently chosen.
Widget Cheatsheet - Archive of obsolete content
Archive › Mozilla › XUL › Widget Cheatsheet
menu <menu value="menu widget"> <menupopup> <menuitem value="foo" /> <menuitem value="shoo" /> <menu value="sub"> <menupopup> <menuitem value="subitem" /> </menupopup> </menu> </menupopup> </menu> <menulist value="menulist element"> <menupopup> <menuitem value="foo" /> <menuitem value="shoo" /> <menuitem value="boo" /> </menupopup> </menulist> <menubutton src="back.gif"> <menupopup> <menuitem value="foo" /> <menuitem value="shoo" /> <menuitem value="boo" /> </menupopup> </menubutton> ...
Writing Skinnable XUL and CSS - Archive of obsolete content
Archive › Mozilla › XUL › Writing skinnable XUL and CSS
the colors for the toolbar and buttons should be drawn from global by placingclass attributes on the appropriate elements in the xul.
XUL Parser in Python/source - Archive of obsolete content
Archive › Mozilla › XUL › XUL Parser in Python source
ms(): el_list[name][strip(attr)] = strip(val) def syntax_error(self, message): pass p = xulparser() cmd = 'dir /s /b *.xul' chrome_dir = 'c:\program files\netscape\netscape 6\chrome' os.chdir(chrome_dir) files = os.popen(cmd).readlines() for file in files: file = file.strip() print '** ' + file + ' **' data = open(file).read() p.feed(data) w.write('<html><h3>periodic table of xul elements</h3>') w.write('<table><style>.head {font-weight: bold; background-color: lightgrey;}</style>') elements = el_list.keys() elements.sort() for item in elements: w.write('<tr><td class="head">' + item + '</td></tr>\n') for a in el_list[item]: w.write('<tr><td class="at">' + a + '</td>') w.write('</table></html>\n') w.close() ...
XUL accessibility tool - Archive of obsolete content
Archive › Mozilla › XUL › XUL accessibility tool
(aaronandy) highlight or blink source element in original xul app upon click of referencing line in report.
XUL Coding Style Guidelines - Archive of obsolete content
Archive › Mozilla › XUL › XUL coding style guidelines
it could contain xul specific element types for ui controls, html4 markups for content data, and even javascript for user event handling.
autohide - Archive of obsolete content
Archive › Mozilla › XUL › autohide
this only has an effect on windows and needs to be combined with type="menubar" and a menubar element.
scrollbar - Archive of obsolete content
Archive › Mozilla › XUL › scrollbar
ordinal, orient, , pack, , persist, , , , ref, resource, , , , , statustext, style, ,, tooltip, tooltiptext, top, width methods inherited methods addeventlistener(), appendchild(), blur, click, clonenode(), comparedocumentposition, dispatchevent(), docommand, focus, getattribute(), getattributenode(), getattributenodens(), getattributens(), getboundingclientrect(), getclientrects(), getelementsbyattribute, getelementsbyattributens, getelementsbyclassname(), getelementsbytagname(), getelementsbytagnamens(), getfeature, getuserdata, hasattribute(), hasattributens(), hasattributes(), haschildnodes(), insertbefore(), isdefaultnamespace(), isequalnode, issamenode, issupported(), lookupnamespaceuri, lookupprefix, normalize(), queryselector(), queryselectorall(), removeattribute(), removeattr...
XUL - Archive of obsolete content
Archive › Mozilla › XUL
xul reference xul elements, attributes, properties, methods, and event handlers.
Building XULRunner with Python - Archive of obsolete content
Archive › Mozilla › XULRunner › Building XULRunner with Python
for example def onload(): btntest = document.getelementbyid("btntest") btntest.addeventlistener('command', ontest, false) def ontest(): window.alert('button activated') window.addeventlistener('load', onload, false) one possible gotcha is that the default python path used to find modules that areimported explicitly includes the xulrunner executable directory and the directory that is current when xulrunner launches.
MacFAQ - Archive of obsolete content
Archive › Mozilla › XULRunner › MacFAQ
the toolkit will automatically enable this behavior if you add class="chromeclass-toolbar" to your <toolbar> element.
XULRunner tips - Archive of obsolete content
Archive › Mozilla › XULRunner › Tips
preferences needed for file download dialogs to use the unknown-content-type and file-downloads dialogs from a <browser> element, you need to add the following prefs: pref("browser.download.usedownloaddir", true); pref("browser.download.folderlist", 0); pref("browser.download.manager.showalertoncomplete", true); pref("browser.download.manager.showalertinterval", 2000); pref("browser.download.manager.retention", 2); pref("browser.download.manager.showwhenstarting", true); pref("browser.download.manager.usewindow", true); p...
2006-11-03 - Archive of obsolete content
Archive › Newsgroup summaries › mozilla-dev-apps-thunderbird › 2006-11-03
xul overlay question -- how to replace an existing element?
2006-18-24 - Archive of obsolete content
Archive › Newsgroup summaries › mozilla-dev-platform › 2006-18-24
summary: mozilla.dev.platform - november 18th - november 24th, 2006 announcements no announcements this week traffic xulrunner: <browser> not allowing javascript popup windows b notes that when using xul elements <browser/> and <tabbrowser/> the javascript popup windows don't work out of the box and asks what needs to be implement.
2006-10-27 - Archive of obsolete content
Archive › Newsgroup summaries › mozilla-dev-tech-layout › 2006-10-27
help for getting html element width info discussion on retrieving width information on html elements when using the gecko engine.
2006-11-03 - Archive of obsolete content
Archive › Newsgroup summaries › mozilla-dev-tech-layout › 2006-11-03
captions in ff also exceed the table length and become hidden if it's surrounded by a bounding div element.
2006-10-13 - Archive of obsolete content
Archive › Newsgroup summaries › mozilla-dev-tech-xpcom › 2006-10-13
discussions wxmozilla and ff1.5 xpcom problems updating wxmozilla to use it with firefox 1.5.7 browser elements, opening links in a new window using javascript to open window in new window.
NPAPI plugin developer guide - Archive of obsolete content
Archive › Plugins › Guide
ications how plug-ins work understanding the runtime model plug-in detection how gecko finds plug-ins checking plug-ins by mime type overview of plug-in structure understanding the plug-in api plug-ins and platform independence windowed and windowless plug-ins the default plug-in using html to display plug-ins plug-in display modes using the object element for plug-in display nesting rules for html elements using the appropriate attributes using the embed element for plug-in display using custom embed attributes plug-in references plug-in development overview writing plug-ins registering plug-ins ms windows unix mac os x drawing a plug-in instance handling memory sending and receiving streams working wit...
NPN_GetStringIdentifiers - Archive of obsolete content
Archive › Plugins › Reference › NPN GetStringIdentifiers
identifiers a pointer to the first element of an array to fill with the identifiers for the strings specified by names.
Content - Archive of obsolete content
Archive › RSS › Module › Content
references rss content module element list examples none available at this time community none available at this time tools none available at this time other resources rss content module spec rss, rdf, xml ...
Slash - Archive of obsolete content
Archive › RSS › Module › Slash
references rss slash module element list examples none available at this time community none available at this time tools none available at this time other resources rss slash module slash slashdot rss, rdf, xml ...
Well-Formed Web - Archive of obsolete content
Archive › RSS › Module › Well-Formed Web
references rss well-formed web module element list examples none available at this time community none available at this time tools none available at this time other resources well-formed web spec rss, rdf, xml ...
RSS - Archive of obsolete content
Archive › RSS
atomic rss tim bray talks about using atom 1.0 as a micro format and extension module for rss 2.0; keeping rss 2.0 as your sydication format but bringing in and using selected atom 1.0 elements.
Confidentiality, Integrity, and Availability - Archive of obsolete content
Archive › Security › Confidentiality, Integrity, and Availability
if an attacker is not able to compromise the first two elements of information security (see above) they may try to execute attacks like denial of service that would bring down the server, making the website unavailable to legitimate users due to lack of availability.
Introduction to Public-Key Cryptography - Archive of obsolete content
Archive › Security › Introduction to Public-Key Cryptography
client authentication is an essential element of network security within most intranets or extranets.
Vulnerabilities - Archive of obsolete content
Archive › Security › Vulnerabilities
a security configuration setting is an element of a software’s security that can be altered through the software itself.
Create Your Own Firefox Background Theme - Archive of obsolete content
Archive › Themes › Create Your Own Firefox Background Theme
firefox may reveal more of the lower portion of the image if another toolbar or other ui element is added to the top of the window.
Theme changes in Firefox 3 - Archive of obsolete content
Archive › Themes › Theme changes in Firefox 3
changes in browser --- changes in global all platforms the yellow background for the location bar has been deprecated; instead, themes should style the new #identity-box element depending on its verifieddomain/verifiedidentity class.
Scratchpad - Archive of obsolete content
Archive › Tools › Scratchpad
once you've done this, the environment menu has a browser option; once that's selected, your scope is the entire browser rather than just the page content, as you will see from examining some globals: window /* [object chromewindow] */ gbrowser /* [object xulelement] */ the scratchpad execution context is set to browser when a snippet file has // -sp-context: browser on the first line.
Using Web Standards in your Web Pages - Archive of obsolete content
Archive › Using Web Standards in your Web Pages
the first 2 sections address exclusively validation issues, benefits of validation, deprecated elements, deprecated attributes.
-moz-text-blink - Archive of obsolete content
Archive › Web › CSS › -moz-text-blink
initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values none produces no blinking.
-moz-window-shadow - Archive of obsolete content
Archive › Web › CSS › -moz-window-shadow
initial valuedefaultapplies toall elements that create native windows, e.g.
-ms-block-progression - Archive of obsolete content
Archive › Web › CSS › -ms-block-progression
initial valuetbapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values tb default.
-ms-flow-from - Archive of obsolete content
Archive › Web › CSS › -ms-flow-from
initial valuenoneapplies tonon-replaced elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values none default.
-ms-flow-into - Archive of obsolete content
Archive › Web › CSS › -ms-flow-into
initial valuenoneapplies toiframe elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values none default.
-ms-high-contrast-adjust - Archive of obsolete content
Archive › Web › CSS › -ms-high-contrast-adjust
initial valueautoapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values auto indicates the applicable css properties will be adjusted as expected when the system is in high contrast mode.
-ms-hyphenate-limit-chars - Archive of obsolete content
Archive › Web › CSS › -ms-hyphenate-limit-chars
initial valueautoapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values auto corresponds to a value of 5 2 2, indicating a 5-character word limit, 2 characters required before a hyphenation break, and 2 characters required following a hyphenation break.
-ms-hyphenate-limit-zone - Archive of obsolete content
Archive › Web › CSS › -ms-hyphenate-limit-zone
initial value0applies toblock container elementsinheritedyespercentagescalculated with respect to the width of the line boxcomputed valueas specifiedanimation typediscrete syntax values <percentage> an integer followed by a percent sign (%), which specifies the width of the hyphenation zone, calculated with respect to the line box.
-ms-scrollbar-face-color - Archive of obsolete content
Archive › Web › CSS › -ms-scrollbar-face-color
initial valuethreedfaceapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values <color> the color of the scroll box and scroll arrows.
-ms-scrollbar-highlight-color - Archive of obsolete content
Archive › Web › CSS › -ms-scrollbar-highlight-color
initial valuethreedhighlightapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete syntax values <color> the color of the slider tray, the top and left edges of the scroll box, and the scroll arrows of a scroll bar.
-ms-text-autospace - Archive of obsolete content
Archive › Web › CSS › -ms-text-autospace
initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values none no effect takes place; that is, no extra space is added.
-ms-wrap-margin - Archive of obsolete content
Archive › Web › CSS › -ms-wrap-margin
initial value0applies toexclusion elementsinheritednocomputed valueas specifiedanimation typediscrete syntax values <length> the margin size, a non-negative value.
:-moz-system-metric(images-in-menus) - Archive of obsolete content
Archive › Web › CSS › :-moz-system-metric › images-in-menus
the :-moz-system-metric(images-in-menus) css pseudo-class matches an element if the computer's user interface supports images in menus.
:-moz-system-metric(mac-graphite-theme) - Archive of obsolete content
Archive › Web › CSS › :-moz-system-metric › mac-graphite-theme
:-moz-system-metric(mac-graphite-theme) will match an element if the user has chosen the "graphite" appearance in the "appearance" prefpane of the mac os x system preferences.
:-moz-system-metric(scrollbar-end-backward) - Archive of obsolete content
Archive › Web › CSS › :-moz-system-metric › scrollbar-end-backward
the :-moz-system-metric(scrollbar-end-backward) css pseudo-class will match an element if the computer's user interface includes a backward arrow button at the end of scrollbars.
:-moz-system-metric(scrollbar-end-forward) - Archive of obsolete content
Archive › Web › CSS › :-moz-system-metric › scrollbar-end-forward
the :-moz-system-metric(scrollbar-end-forward) css pseudo-class will match an element if the computer's user interface includes a forward arrow button at the end of scrollbars.
:-moz-system-metric(scrollbar-start-backward) - Archive of obsolete content
Archive › Web › CSS › :-moz-system-metric › scrollbar-start-backward
the :-moz-system-metric(scrollbar-start-backward) css pseudo-class will match an element if the computer's user interface includes a backward arrow button at the start of scrollbars.
:-moz-system-metric(scrollbar-start-forward) - Archive of obsolete content
Archive › Web › CSS › :-moz-system-metric › scrollbar-start-forward
the :-moz-system-metric(scrollbar-start-forward) css pseudo-class will match an element if the computer's user interface includes a forward arrow button at the start of scrollbars.
:-moz-system-metric(scrollbar-thumb-proportional) - Archive of obsolete content
Archive › Web › CSS › :-moz-system-metric › scrollbar-thumb-proportional
the :-moz-system-metric(scrollbar-thumb-proportional) css pseudo-class will match an element if the computer's user interface uses proportional scrollbar thumbs; that is, the draggable thumb on the scrollbar resizes to indicate the relative size of the visible area of the document.
:-moz-system-metric(touch-enabled) - Archive of obsolete content
Archive › Web › CSS › :-moz-system-metric › touch-enabled
the :-moz-system-metric(touch-enabled) css pseudo-class will match an element if the device on which the content is being rendered offers a supported touch-screen interface.
:-moz-system-metric(windows-default-theme) - Archive of obsolete content
Archive › Web › CSS › :-moz-system-metric › windows-default-theme
the :-moz-system-metric(windows-default-theme) css pseudo-class matches an element if the user is currently using one of the following themes in windows: luna, royale, zune, or aero (i.e., vista basic, vista standard, or aero glass).
::-ms-browse - Archive of obsolete content
Archive › Web › CSS › ::-ms-browse
the ::-ms-browse css pseudo-element is a microsoft extension that represents the button that opens the file picker of <input type="file">.
::-ms-expand - Archive of obsolete content
Archive › Web › CSS › ::-ms-expand
the ::-ms-expand css pseudo-element is a microsoft extension that represents the button of a <select> menu control that opens or closes the drop-down menu.
::-ms-fill-lower - Archive of obsolete content
Archive › Web › CSS › ::-ms-fill-lower
the ::-ms-fill-lower css pseudo-element represents the lower portion of the track of a slider control; that is, the portion corresponding to values less than the value currently selected by the thumb.
::-ms-fill-upper - Archive of obsolete content
Archive › Web › CSS › ::-ms-fill-upper
the ::-ms-fill-upper css pseudo-element is a microsoft extension that represents the upper portion of the track of a slider control; that is, the portion corresponding to values greater than the value currently selected by the thumb.
::-ms-thumb - Archive of obsolete content
Archive › Web › CSS › ::-ms-thumb
the ::-ms-thumb css pseudo-element is a microsoft extension that represents the thumb that the user moves within the track of a slider control to alter its numerical value.
::-ms-tooltip - Archive of obsolete content
Archive › Web › CSS › ::-ms-tooltip
the ::-ms-tooltip css pseudo-element is a microsoft extension that represents the tooltip of a slider control.
::-ms-value - Archive of obsolete content
Archive › Web › CSS › ::-ms-value
the ::-ms-value css pseudo-element is a microsoft extension that applies rules to the value of a text or password <input> control or the content of a <select> control.
azimuth - Archive of obsolete content
Archive › Web › CSS › azimuth
initial valuecenterapplies toall elementsinheritedyescomputed valuenormalized angleanimation typediscrete syntax <angle> | [ [ left-side | far-left | left | center-left | center | center-right | right | far-right | right-side ] | behind ] | leftwards | rightwards values angle audible source position is described as an angle within the range -360deg to 360deg.
Displaying notifications (deprecated) - Archive of obsolete content
Archive › Web › Displaying notifications (deprecated)
for example, let's simply append a little html to our document when these events fire: notification.onclick = function() { var e = document.createelement("p"); e.innerhtml = "<strong>the notification was clicked.</strong>"; document.body.appendchild(e); }; notification.onclose = function() { var e = document.createelement("p"); e.innerhtml = "<strong>the notification was closed.</strong>"; document.body.appendchild(e); }; displaying the notification once the notification is configured the way you want it to be, call its show() method t...
Enumerator - Archive of obsolete content
Archive › Web › JavaScript › Microsoft Extensions › Enumerator
instead of using indexes, as you would with arrays, you can move the current item pointer only to the first or next element of a collection.
VBArray.toArray - Archive of obsolete content
Archive › Web › JavaScript › Microsoft Extensions › VBArray › toArray
for example, a vbarray with three dimensions and three elements in each dimension is converted into a javascript array as follows: suppose the vbarray contains: (1, 2, 3), (4, 5, 6), (7, 8, 9).
New in JavaScript 1.8 - Archive of obsolete content
Archive › Web › JavaScript › New in JavaScript › 1.8
when using the javascript shell, javascript xpcom components, or xul <script> elements, the latest js version (js1.8 in mozilla 1.9) is used automatically (bug 381031, bug 385159).
ParallelArray - Archive of obsolete content
Archive › Web › ParallelArray
syntax new parallelarray() new parallelarray([element0, element1, ...]) new parallelarray(arraylength, elementalfunction) parallelarray instances properties length reflects the number of elements in the parallelarray.
background-size - Archive of obsolete content
Archive › Web › Talk:CSS background-size
i'm guessing not, just asking because having both rules in for 3.6 creates a strange effect: -moz-border-image gets inherited by every element on the page user:robertc 2009-08-08 -moz-border-image should not inherit.
XForms - Archive of obsolete content
Archive › Web › XForms
xforms ui elements reference xforms user interface elements documentation.
Choosing Standards Compliance Over Proprietary Practices - Archive of obsolete content
Archive › Web Standards › Choosing Standards Compliance Over Proprietary Practices
as a product provider, the goal should be the element of least surprise.
XUL Booster - Archive of obsolete content
Archive › XUL Booster
learn more at creating_a_mozilla_extension:finding_the_file_to_modify to create an xul:overlay, create a xul fragment with a top level node that has an id matching an existing element, ex.
Archive of obsolete content
Archive
element events archived event pages firefox developer tools these are articles related to the firefox developer tools, which are no longer current.
Anatomy of a video game - Game development
Games › Anatomy
you could draw every pixel individually on a canvas or you could layer dom elements (including multiple webgl canvases with transparent backgrounds if you want) into a complex hierarchy.
Examples - Game development
Games › Examples
webgl filters demo showing webgl filters being used to add effects to html elements.
Explaining basic 3D theory - Game development
Games › Techniques › 3D on the web › Basic theory
textures are combined from single texture elements called texels the same way picture elements are combined from pixels.
2D breakout game using pure JavaScript - Game development
Games › Tutorials › 2D Breakout game pure JavaScript
you will learn the basics of using the <canvas> element to implement fundamental game mechanics like rendering and moving images, collision detection, control mechanisms, and winning and losing states.
Bounce off the walls - Game development
Games › Tutorials › 2D breakout game Phaser › Bounce off the walls
bouncing off the world boundaries the easiest way to get our ball bouncing off the walls is to tell the framework that we want to treat the boundaries of the <canvas> element as walls and not let the ball move past them.
Scaling - Game development
Games › Tutorials › 2D breakout game Phaser › Scaling
user_scale — allows you to have custom dynamic scaling, calculating the size, scale and ratio on your own; again, this is more of an advanced mode the other two lines of code in the preload() function are responsible for aligning the canvas element horizontally and vertically, so it is always centered on screen regardless of size.
Tutorials - Game development
Games › Tutorials
along the way you will learn the basics of using the <canvas> element to implement fundamental game mechanics like rendering and moving images, collision detection, control machanisms, and winning and losing states.
Attribute - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Attribute
an attribute extends an element, changing its behavior or providing metadata.
CSRF - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › CSRF
this can be done, for example, by including malicious parameters in a url behind a link that purports to go somewhere else: <img src="https://www.example.com/index.php?action=delete&id=123"> for users who have modification permissions on https://www.example.com, the <img> element executes action on https://www.example.com without their noticing, even if the element is not at https://www.example.com.
CSS pixel - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › CSS pixel
in other words, if the user is on a phone with a pixel density of 266 dpi, and an element is placed on the screen with a width of 96px, the actual width of the element would be 266 device pixels.
Client hints - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Client hints
servers announce support for client hints using the accept-ch (accept client hints) header or an equivalent html meta element with the http-equiv attribute.
DOM (Document Object Model) - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › DOM
an element, text string, or comment).
First CPU idle - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › First CPU idle
generally, it occurs when most, but not necessarily all visible ui elements are interactive, and the user interface responds, on average, to most user input within 50ms.
First interactive - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › First interactive
minimally interactive is defined as when some, but not necessarily all, ui elements on the page have loaded and are interactive, and, on average, respond to user input in a reasonable amount of time.
Flex - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Flex
along with inline-flex it causes the element that it applies to to become a flex container, and the element's children to each become a flex item.
Flex Item - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Flex Item
the direct children of a flex container (elements with display: flex or display: inline-flex set on them) become flex items.
HTML5 - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › HTML5
among other features, html5 includes new elements and javascript apis to enhance storage, multimedia, and hardware access.
Head - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Head
learn more html head <head> element reference on mdn the html <head> on the mdn learning area ...
High-level programming language - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › High-level programming language
unlike low-level programming languages, it may use natural language elements, or may automate (or even entirely hide) significant areas of computing systems, making the process of developing simpler and more understandable relative to a lower-level language.
Hyperlink - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Hyperlink
in html, <a> elements define hyperlinks from a spot on a webpage (like a text string or image) to another spot on some other webpage (or even on the same page).
Media (Audio-visual presentation) - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Media › Audio-visual presentation
learn more general knowledge multimedia on wikipedia technical reference web media technologies: a guide to all the ways media can be used in web content multimedia and embedding in the mdn learning area <audio> and <video> elements, used to present media in html documents ...
Node (DOM) - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Node › DOM
various things that are nodes are the document itself, elements, text, and comments.
Node - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Node
various things that are nodes are the document itself, elements, text, and comments.
Polyfill - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Polyfill
for example, a polyfill could be used to mimic the functionality of an html canvas element on microsoft internet explorer 7 using a silverlight plugin or mimic support for css rem units, or text-shadow, or whatever you want.
Pseudo-class - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Pseudo-class
in css, a pseudo-class selector targets elements depending on their state rather than on information from the document tree.
Ruby - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Ruby
ruby is also a method for annotating east asian text in html documents to provide pronunciation information; see the <ruby> element.
SVG - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › SVG
as a vector image format, svg graphics can scale infinitely, making them invaluable in responsive design, since you can create interface elements and graphics that scale to any screen size.
Screen reader - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Screen reader
just like keyboard navigation without voiceover, you can navigate through interactive elements using the tab key and the arrow keys: next interactive element: tab previous interactive element: shift + tab next radio button in a same named-group: right or down arrow previous radio button in a same named-group: left or up arrow navigating through the content of a page is done with the tab key and a series of other keys along with control + option keys next heading: control + opti...
Stacking context - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Stacking context
stacking context refers to how elements on a webpage appear to sit on top of other elements, just as you can arrange index cards on your desk to lie side-by-side or overlap each other.
Stylesheet - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Stylesheet
internal stylesheets are placed inside a <style> element inside the <head> of a web document, and external stylesheets are placed inside a separate .css file, which is applied to a document by referencing the file inside a <link> element in the document's head.
WebGL - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › WebGL
you can invoke webgl within the html <canvas> element, which provides a rendering surface.
WebVTT - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › WebVTT
webvtt (web video text tracks) is a w3c specification for a file format marking up text track resources in combination with the html <track> element.
Whitespace - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › Whitespace
they are also used as a separator of an element name and its parameters, class names, and so on.
Bounding Box - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › bounding box
the bounding box of an element is the smallest possible rectangle (aligned with the axes of that element's user coordinate system) that entirely encloses it and its descendants.
Event - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › event
events are assets generated by dom elements, which can be manipulated by a javascript code.
markup - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › markup
within a text file such as an html file, elements are marked up using tags which explain the purpose of that part of the content.
Property - MDN Web Docs Glossary: Definitions of Web-related terms
Glossary › property
it may refer to: property (css) a css property is a characteristic (like color) whose associated value defines one aspect of how the browser should display the element.
Mobile accessibility - Learn web development
Learn › Accessibility › Mobile
as an example, the click event is good in terms of accessibility — an associated event handler can be invoked by clicking the element the handler is set on, tabbing to it and pressing enter/return, or tapping it on a touchscreen device.
Test your skills: HTML accessibility - Learn web development
Learn › Accessibility › Test your skills: HTML accessibility
assume that these inputs will be part of a larger form, and wrap them in an element that associates them all together as a single related group.
Test your skills: WAI-ARIA - Learn web development
Learn › Accessibility › WAI-ARIA basics › Test your skills: WAI-ARIA
assuming you are not able to change the elements used, how can you allow screenreader users to recognize this as a list?
Accessibility - Learn web development
Learn › Accessibility
html: a good basis for accessibility a great deal of web content can be made accessible just by making sure the correct html elements are always used for the correct purpose .
A cool-looking box - Learn web development
Learn › CSS › Building blocks › A cool looking box
if the online editor you are using doesn't have a separate css panel, feel free to put it in a <style> element in the head of the document.
Creating fancy letterheaded paper - Learn web development
Learn › CSS › Building blocks › Creating fancy letterheaded paper
if the online editor you are using doesn't have a separate css panel, feel free to put it in a <style> element in the head of the document.
Test your skills: Flexbox - Learn web development
Learn › CSS › CSS layout › Flexbox skills
flex layout three there are two elements in the html below, a div with a class of .parent which contains another div with a class of .child.
Test Your Skills: Fundamental layout comprehension - Learn web development
Learn › CSS › CSS layout › Fundamental Layout Comprehension
the <article> and <aside> elements should display as a two column layout.
Test your skills: position - Learn web development
Learn › CSS › CSS layout › Position skills
you will be working through two small tasks which use different elements of the material you have just covered.
Using your new knowledge - Learn web development
Learn › CSS › First steps › Using your new knowledge
font-family color border-bottom font-weight font-size text-decoration i have used a mixture of selectors, styling elements such as h1 and h2, but also creating a class for the job title and styling that.
Use CSS to solve common problems - Learn web development
Learn › CSS › Howto
common use cases basics how to apply css to the dom how to use whitespace in css how to write comments in css how to select elements via element name, class or id how to select elements via attribute name and content how to use pseudo-classes how to use pseudo-elements how to apply multiple selectors to the same rule how to specify colors in css how to debug css in the browser css and text how to style text how to customize a list of elements how to style links how to add shadows to text boxes and layouts how to size css boxes how to control overflowing content how to control the part of a css box that the background is drawn under how do i define inline, block, and inli...
Web fonts - Learn web development
Learn › CSS › Styling text › Web fonts
put it above the existing <link> element, so that the font is imported before you try to use it in your css.
Learn to style HTML using CSS - Learn web development
Learn › CSS
from the beginning, you'll primarily apply colors to html elements and their backgrounds; change the size, shape, and position of elements; and add and define borders on elements.
What do common web layouts contain? - Learn web development
Learn › Common questions › Common web layouts
these elements are quite common in all form factors, but they can be laid out different ways.
How much does it cost to do something on the Web? - Learn web development
Learn › Common questions › How much does it cost
likewise, video-editing software can be free (pitivi, openshot for linux, imovie for mac), less than $100 (adobe premiere elements), or several hundred dollars (adobe premiere pro, avid media composer, final cut pro).
What is a URL? - Learn web development
Learn › Common questions › What is a URL
the html language — which will be discussed later on — makes extensive use of urls: to create links to other documents with the <a> element; to link a document with its related resources through various elements such as <link> or <script>; to display media such as images (with the <img> element), videos (with the <video> element), sounds and music (with the <audio> element), etc.; to display other html documents with the <iframe> element.
Sending form data - Learn web development
Learn › Forms › Sending and retrieving form data
on the client side: defining how to send the data the <form> element defines how the data will be sent.
Test your skills: Basic controls - Learn web development
Learn › Forms › Test your skills: Basic controls
basic controls 1 this task starts you off nice and gently by asking you to create two <input> elements, for a user's id and password, along with a submit button.
Test your skills: HTML5 controls - Learn web development
Learn › Forms › Test your skills: HTML5 controls
create a corresponding output element to put the current value of the slider into.
Installing basic software - Learn web development
Learn › Getting started with the web › Installing basic software
office document editors are not suitable for this use, as they rely on hidden elements that interfere with the rendering engines used by web browsers.
Use JavaScript within a webpage - Learn web development
Learn › HTML › Howto › Use JavaScript within a webpage
to call javascript code from within html, you need the <script> element.
Use HTML to solve common problems - Learn web development
Learn › HTML › Howto
how to use data attributes advanced text semantics how to take control of html line breaking how to mark changes (added and removed text) — see the <ins> and <del> elements.
Assessment: Structuring planet data - Learn web development
Learn › HTML › Tables › Structuring planet data
if the online editor you are using doesn't have separate javascript/css panels, feel free to put them inline <script>/<style> elements inside the html page.
HTML Tables - Learn web development
Learn › HTML › Tables
a very common task in html is structuring tabular data, and it has a number of elements and attributes for just this purpose.
General asynchronous programming concepts - Learn web development
Learn › JavaScript › Asynchronous › Concepts
hat when clicked, it runs a time-consuming operation (calculates 10 million dates then logs the final one to the console) and then adds a paragraph to the dom: const btn = document.queryselector('button'); btn.addeventlistener('click', () => { let mydate; for(let i = 0; i < 10000000; i++) { let date = new date(); mydate = date } console.log(mydate); let pelem = document.createelement('p'); pelem.textcontent = 'this is a newly-added paragraph.'; document.body.appendchild(pelem); }); when running the example, open your javascript console then click the button — you'll notice that the paragraph does not appear until after the dates have finished being calculated and the console message has been logged.
Test your skills: Functions - Learn web development
Learn › JavaScript › Building blocks › Test your skills: Functions
dom manipulation: considered useful some of the questions below require you to write some dom manipulation code to complete them — such as creating new html elements, setting their text contents to equal specific string values, and nesting them inside existing elements on the page — all via javascript.
Storing the information you need — Variables - Learn web development
Learn › JavaScript › First steps › Variables
you might have noticed that arrays in javascript are zero-indexed: the first element is at index 0.
Object-oriented JavaScript for beginners - Learn web development
Learn › JavaScript › Objects › Object-oriented JS
add this function within the script element: function createnewperson(name) { const obj = {}; obj.name = name; obj.greeting = function() { alert('hi!
What is web performance? - Learn web development
Learn › Performance › What is web performance
the document object model, or dom, is a tree structure that represents the content and elements of your html as a tree of nodes.
Learning area release notes - Learn web development
Learn › Release notes
ou'll now find "test your skills" assessments accompanying the articles in the following modules: css building blocks javascript first steps javascript building blocks introducing javascript objects january 2020 the html forms module has been significantly updated: it has been retitled web forms, and moved out of the html topic area to recognise that it covers more than just html form elements — it also covers styling, validation, the basics of how to send data and process it on the server, and more besides.
Website security - Learn web development
Learn › Server-side › First steps › Website security
for html this includes elements, such as <script>, <object>, <embed>, and <link>.
Getting started with Ember - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Ember getting started
there are a couple of github issues open about this on the todomvc family of projects: add keyboard access to demos re-enable outline on focusable elements ember has a strong commitment to being accessible by default and there is an entire section of the ember guides on accessibility on what it means for website / app design.
Ember app structure and componentization - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Ember structure componentization
in ember, a component invocation is similar to declaring an html element, but the first letter starts with a capital letter, and the names are written in upper camel case, as you'll see with <todolist /> later on.
React interactivity: Editing, filtering, conditional rendering - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › React interactivity filtering conditional rendering
render an array of <filterbutton /> elements that allow users to change the active filter between all, completed, and incomplete.
Deployment and next steps - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Svelte deployment next
we also saw some advanced concepts and techniques to interact with dom elements and to programmatically extend html element capabilities using the use directive.
Vue conditional rendering: editing existing todos - Learn web development
Learn › Tools and testing › Client-side JavaScript frameworks › Vue conditional rendering
add this line at the top of your <script> element: import todoitemeditform from "./todoitemeditform"; and add a components property about the props property inside the component object: components: { todoitemeditform }, now, if you go to your app and click a todo item's "edit" button, you should see the checkbox replaced with the edit form.
Introduction to automated testing - Learn web development
Learn › Tools and testing › Cross browser testing › Automated testing
in the input version of the file, you may have noticed that we put an empty <p> element; htmltidy has removed this by the time the output file has been created.
Introducing a complete toolchain - Learn web development
Learn › Tools and testing › Understanding client-side tools › Introducing complete toolchain
this makes sense: if an unknown html element or invalid css property is used, due to the resilient nature of these two languages nothing is likely to break.
Learn web development
Learn
random glossary entry semantics in programming, semantics refers to the meaning of a piece of code — for example "what effect does running that line of javascript have?", or "what purpose or role does that html element have" (rather than "what does it look like?".) topics covered the following is a list of all the topics we cover in the mdn learning area.
Lightweight themes
Mozilla › Add-ons › Themes › Lightweight themes
firefox may reveal more of the lower portion of the image if another toolbar or other ui element is added to the top of the window.
Theme concepts
Mozilla › Add-ons › Themes › Theme concepts
for example, the following code, from the dynamic theme example defines the content for the day and night elements of the dynamic theme: const themes = { 'day': { images: { theme_frame: 'sun.jpg', }, colors: { frame: '#cf723f', tab_background_text: '#111', } }, 'night': { images: { theme_frame: 'moon.jpg', }, colors: { frame: '#000', tab_background_text: '#fff', } } }; the theme.theme object is then passed to theme.update() to change the...
Browser chrome tests
Mozilla › Browser chrome tests
gbrowser is set in browser.js and is a tabbrowser element (the tabbrowser with id="content" in browser.xul).
Creating a spell check dictionary add-on
Mozilla › Creating a spell check dictionary add-on
don't change em:type or em:unpack, and don't add a em:bootstrap element.
Contributing to the Mozilla code base
Mozilla › Developer guide › Introduction
when you commit your code, please use the following format for your commit message: `bug number - what your patch does; r?reviewer` for example, a commit message may look like `bug 1234567 - remove reflow by caching element size.
Index
Mozilla › Firefox › Index
always keep in mind the side effects your changes may have, from blocking other tasks to interfering with other user interface elements.
Frame script environment
Mozilla › Firefox › Multiprocess Leftovers › Frame script environment
in particular, note that a frame script accesses the dom window using content, not window: // frame script var links = content.document.getelementsbytagname("a"); all the frame scripts running in a tab share this global.
Communicating with frame scripts
Mozilla › Firefox › Multiprocess Leftovers › Message Manager › Communicating with frame scripts
target the xul <browser> element from which this message was sent.
Frame script environment
Mozilla › Firefox › Multiprocess Leftovers › Message Manager › Frame script environment
in particular, note that a frame script accesses the dom window using content, not window: // frame script var links = content.document.getelementsbytagname("a"); all of the frame scripts running in a tab share this global.
Message manager overview
Mozilla › Firefox › Multiprocess Leftovers › Message Manager › Message manager overview
ame addmessagelistener() : start listening to a specific message from frame scripts removemessagelistener() : stop listening to a specific message interfaces nsiprocesschecker nsiframescriptloader nsimessagelistenermanager nsimessagesender how to access the browser message manager can be accessed as a property of the xul <browser> element: // chrome script let browsermm = gbrowser.selectedbrowser.messagemanager; content process content frame message manager description there's a content frame message manager for every open tab.
Multiprocess Firefox
Mozilla › Firefox › Multiprocess Leftovers
some elements of multiprocess firefox have been retained for compatibility.
Blocked: All storage access requests
Mozilla › Firefox › Privacy › Storage access policy › Errors › CookieBlockedAll
the permission can be changed or removed by: going to preferences > content blocking in the custom content blocking section, selecting a value other than all cookies for the cookies item if the resource that is being blocked doesn't need authentication, you can fix the warning message by adding a crossorigin="anonymous" attribute to your element.
Blocked: All third-party storage access requests
Mozilla › Firefox › Privacy › Storage access policy › Errors › CookieBlockedForeign
the permission can be changed or removed by: going to preferences > content blocking and either adding an exception with the manage exceptions… button choosing the custom content blocking and unchecking the cookies checkbox if the resource that is being blocked doesn't need authentication, you can fix the warning message by adding a crossorigin="anonymous" attribute to the relevant element.
Blocked: Storage access requests from trackers
Mozilla › Firefox › Privacy › Storage access policy › Errors › CookieBlockedTracker
the permission can be changed or removed by: going to preferences > content blocking and either adding an exception with the manage exceptions… button choosing the custom content blocking and unchecking the tracker checkbox if the blocked resource doesn't need authentication, you can fix the warning message by adding a crossorigin="anonymous" attribute to the relevant element.
Tracking Protection
Mozilla › Firefox › Privacy › Tracking Protection
sometimes users won’t notice at all, if the page grid works such that other page elements slide in to fill holes left by blocked elements.
Firefox
Mozilla › Firefox
always keep in mind the side effects your changes may have, from blocking other tasks, to interfering with other user interface elements.privacythis document lists privacy-related documentation.security best practices for firefox front-end engineersthis article will help firefox developers understand the security controls in place and avoid common pitfalls when developing front-end code for firefox.site identity buttonthe site identity button is a feature in firefox that gives users more information about the sites they visit.
mozbrowserfindchange
Mozilla › Gecko › Chrome › API › Browser API › mozbrowserfindchange
this includes htmliframeelement.findall(), htmliframeelement.findnext(), and htmliframeelement.clearmatch().
mozbrowsericonchange
Mozilla › Gecko › Chrome › API › Browser API › mozbrowsericonchange
the any keyword can also be used, to represent "any size." rel a domstring representing the rel attribute value from the <link> element used to link to the icon.
mozbrowsermetachange
Mozilla › Gecko › Chrome › API › Browser API › mozbrowsermetachange
the mozbrowsermetachange event is fired when a <meta> element related to web applications is added, removed or changed.
mozbrowsertitlechange
Mozilla › Gecko › Chrome › API › Browser API › mozbrowsertitlechange
the contents of the <title> element) changes.
Chrome-only API reference
Mozilla › Gecko › Chrome › API
browser apithe html browser api is an extension of the html <iframe> element that allows web apps to implement browsers or browser-like applications.
-moz-window-dragging
Mozilla › Gecko › Chrome › CSS › -moz-window-dragging
initial value drag applies to all elements that create native windows, e.g.
:-moz-lwtheme
Mozilla › Gecko › Chrome › CSS › :-moz-lwtheme
the :-moz-lwtheme pseudo-class matches in chrome documents when the root element's lightweightthemes attribute is true and a theme is selected.
::-moz-tree-image
Mozilla › Gecko › Chrome › CSS › :-moz-tree-image
associated elements <xul:treeitem> <xul:treecell> style properties margin list-style position examples bookmark icons in the places window - mozillazine forum ...
::-moz-tree-cell-text(hover)
Mozilla › Gecko › Chrome › CSS › ::-moz-tree-cell-text(hover)
the :-moz-tree-cell-text(hover) css pseudo-class will match an element if the mouse cursor is presently hovering over text in a tree cell.
::-moz-tree-cell-text
Mozilla › Gecko › Chrome › CSS › ::-moz-tree-cell-text
associated elements <xul:treecell> style properties font visibility color text-decoration ...
::-moz-tree-cell
Mozilla › Gecko › Chrome › CSS › ::-moz-tree-cell
associated elements <xul:treecell> style properties background border margin outline padding visibility ...
::-moz-tree-column
Mozilla › Gecko › Chrome › CSS › ::-moz-tree-column
associated elements <xul:treecol> style properties margin visibility text style ...
::-moz-tree-drop-feedback
Mozilla › Gecko › Chrome › CSS › ::-moz-tree-drop-feedback
associated elements <xul:treerow> style properties margin visibility ...
::-moz-tree-indentation
Mozilla › Gecko › Chrome › CSS › ::-moz-tree-indentation
associated elements <xul:treeitem> style properties position ...
::-moz-tree-line
Mozilla › Gecko › Chrome › CSS › ::-moz-tree-line
associated elements <xul:treeitem> style properties border visibility ...
::-moz-tree-progressmeter
Mozilla › Gecko › Chrome › CSS › ::-moz-tree-progressmeter
associated elements <xul:treecell> style properties margin color ...
::-moz-tree-row(hover)
Mozilla › Gecko › Chrome › CSS › ::-moz-tree-row(hover)
the ::-moz-tree-row(hover) css pseudo-class will match an element if the mouse cursor is presently hovering over a tree row.
::-moz-tree-separator
Mozilla › Gecko › Chrome › CSS › ::-moz-tree-separator
associated elements <xul:treeseparator> style properties border display -moz-appearance ...
::-moz-tree-twisty
Mozilla › Gecko › Chrome › CSS › ::-moz-tree-twisty
associated elements <xul:treecell> style properties border margin padding display list-style position -moz-appearance ...
overflow-clip-box-block
Mozilla › Gecko › Chrome › CSS › overflow-clip-box-block
"things"> <input value="abcdefghijklmnopqrstuvwxyzÅÄÖ" class="scroll padding-box"> <div class="scroll padding-box"><span>abcdefghijklmnopqrstuvwxyzÅÄÖ</span></div> </div> css .scroll { overflow: auto; padding: 0 30px; width: 6em; border: 1px solid black; background: lime content-box; } .padding-box { overflow-clip-box-block: padding-box; } javascript function scrollsomeelements() { var elms = document.queryselectorall('.scroll'); for (i=0; i < elms.length; ++i) { elms[i].scrollleft=80; } } var elt = document.queryelementsbytagname('body')[0]; elt.addeventlistener("load", scrollsomeelements, false); result specifications this property has been proposed to the w3c csswg; it is not yet on the standard track but, if accepted, should appear in css overflow ...
overflow-clip-box-inline
Mozilla › Gecko › Chrome › CSS › overflow-clip-box-inline
things"> <input value="abcdefghijklmnopqrstuvwxyzÅÄÖ" class="scroll padding-box"> <div class="scroll padding-box"><span>abcdefghijklmnopqrstuvwxyzÅÄÖ</span></div> </div> css .scroll { overflow: auto; padding: 0 30px; width: 6em; border: 1px solid black; background: lime content-box; } .padding-box { overflow-clip-box-inline: padding-box; } javascript function scrollsomeelements() { var elms = document.queryselectorall('.scroll'); for (i=0; i < elms.length; ++i) { elms[i].scrollleft=80; } } var elt = document.queryelementsbytagname('body')[0]; elt.addeventlistener("load", scrollsomeelements, false); result specifications this property has been proposed to the w3c csswg; it is not yet on the standard track but, if accepted, should appear in css overflow ...
MozBeforePaint
Mozilla › Gecko › Chrome › Events › MozBeforePaint
<!doctype html> <html> <body> <div id="d" style="width:100px; height:100px; background:lime; position:relative;"></div> <script> var d = document.getelementbyid("d"); var start = window.mozanimationstarttime; function step(event) { var progress = event.timestamp - start; d.style.left = math.min(progress/10, 200) + "px"; if (progress < 2000) { window.mozrequestanimationframe(); } else { window.removeeventlistener("mozbeforepaint", step, false); } } window.addeventlistener("mozbeforepaint", step, false); window.mozrequestanimationfram...
Overview of Mozilla embedding APIs
Mozilla › Gecko › Embedding Mozilla › API overview
this interface also allows access to the currently focused domwindow and domelement.
Gecko's "Almost Standards" Mode
Mozilla › Gecko Almost Standards Mode
"almost standards" rendering mode is exactly the same as "standards" mode in all details save one, where it works like "quirks" mode: the height calculations for line boxes and some of the inline elements in them.
How Mozilla determines MIME Types
Mozilla › How Mozilla determines MIME Types
this means that, for example, if mozilla encounters a <link type="text/css" rel="stylesheet" href="..."> element, a type of text/css will be assumed.
API-provided widgets
Mozilla › JavaScript code modules › CustomizableUI.jsm › API-provided widgets
overflows whether widget can overflow when in an overflowable toolbar (optional, default: true) defaultarea default area to add the widget to (optional, default: none; required if non-removable) shortcutid id of an element that has a shortcut for this widget (optional, default: null).
Dict.jsm
Mozilla › JavaScript code modules › Dict.jsm
items iterator returns an iterator over all of the items in the dictionary; each item is returned as a pair (a two-element array) with the first element being the key and the second being the value.
Http.jsm
Mozilla › JavaScript code modules › Http.jsm
the elements of the array will be url-encoded and "application/x-www-form-urlencoded; charset=utf-8" will be enforced as the content type.
OS.File for the main thread
Mozilla › JavaScript code modules › OSFile.jsm › OS.File for the main thread
var img = new image(); img.onload = function() { var canvas = document.createelementns('http://www.w3.org/1999/xhtml', 'canvas'); canvas.width = img.naturalwidth; canvas.height = img.naturalheight; var ctx = canvas.getcontext('2d'); ctx.drawimage(img, 0, 0); (canvas.toblobhd || canvas.toblob).call(canvas, function(b) { var r = cc['@mozilla.org/files/filereader;1'].createinstance(ci.nsidomfilereader); //new filereader(); r.onloadend = function()...
Webapps.jsm
Mozilla › JavaScript code modules › Webapps.jsm
getdefaultcspbylocalid: function(alocalid) getapplocalidbystoreid: function(astoreid) getappbylocalid: function(alocalid) getmanifesturlbylocalid: function(alocalid) getapplocalidbymanifesturl: function(amanifesturl) getcoreappsbasepath: function() getwebappsbasepath: function() _islaunchable: function(aapp) _notifycategoryandobservers: function(subject, topic, data, msg) registerbrowserelementparentforapp: function(amsg, amn) receiveappmessage: function(appid, message) _clearprivatedata: function(appid, browseronly, msg) _sendprogressevent: function() updatestatechanged: function appobs_update(aupdate, astate) applicationcacheavailable: function appobs_cacheavail(aapplicationcache) ...
XPCOMUtils.jsm
Mozilla › JavaScript code modules › XPCOMUtils.jsm
interface the expected interface for each element.
L10n testing with xcode
Mozilla › Localization › L10n testing with xcode
now, you can navigate through the firefox app in the ios simulator, viewing both ui elements and accessibility strings as you go.
Localization and Plurals
Mozilla › Localization › Localization and Plurals
of files # example: 111 files - downloads downloadstitlefiles=#1 file - downloads;#1 files - downloads # localization note (timepair): #1 time number; #2 time unit # example: 1 second; 11 seconds timepair=#1 #2 seconds=second;seconds minutes=minute;minutes hours=hour;hours downloads.js: components.utils.import("resource://gre/modules/pluralform.jsm"); let getstr = function(string) document.getelementbyid("strings").getstring(string); // get the correct plural form for the title let numdownloads = 3; let title = pluralform.get(numdownloads, getstr("downloadstitlefiles")); // put in the correct number of downloads print(title.replace("#1", numdownloads)); // get the correct plural form of seconds let timeleft = 55; let seconds = pluralform.get(timeleft, getstr("seconds")); // print the locali...
Localization sign-off reviews
Mozilla › Localization › Sign-off reviews
in principle, they share basic elements, but sign-off reviews are only for evaluating the changes between your latest approved revision and the new revision you've submitted for release approval.
What every Mozilla translator should know
Mozilla › Localization › What every Mozilla translator should know
if you choose to make any changes to the productization elements (i.e.
Fonts for Mozilla 2.0's MathML engine
Mozilla › MathML Project › FontsMozilla2
if necessary, you might want to modify the font-family on the <math> elements and, for gecko, the on ::-moz-math-stretchy pseudo element too.
MathML3Testsuite
Mozilla › MathML Project › MathML3Testsuite
characters blocks symbols variants entitynames numericrefs utf8 general clipboard genattribs math presentation css dynamicexpressions generallayout scriptsandlimits tablesandmatrices tokenelements topics accents bidi elementarymathexamples embellishedop largeop linebreak nesting stretchychars whitespace torturetests errorhandling original document information author(s): frédéric wang other contributors: last updated date: may 26, 2010 copyright information: portions of this content are © 2010 by individual mozilla.org contributors; content available under a creative co...
MathML In Action
Mozilla › MathML Project › Start
> <mi>a</mi> </mrow> </mfrac> </mrow> </mstyle> </math> </p> javascript content function zoomtoggle() { if (this.hasattribute("mathsize")) { this.removeattribute("mathsize"); } else { this.setattribute("mathsize", "200%"); } } function load() { document.getelementbyid("zoomablemath").
Various MathML Tests
Mozilla › MathML Project › Various
overview of presentation mathml elements testing tensor indices <mmultiscripts>: r i1 j2 k3 ; this with <none/>, a qp i a bit of calculus: ∫ a b f ( x ) dx ∂ ∂ x f ( x , y ) + ∂ ∂ y f ( x , y ) here is the alphabet with invisible portions wrapped by <mphantom> in between: a b c d e f g h i j k l m n o p q r s t u v w x y z .
MathML Demo: <mtable> - tables and matrices
Mozilla › MathML Project › mtable
and making floating elements do a multiplication such as the following one which is anchored at a baseline is made simple by using align="baseline1" on both tables [ a b c d ] [ a b c d ] to multiply a matrix a by a vector x, each row of the matrix has to be multiplied to the vector.
Mozilla MathML Project
Mozilla › MathML Project
links installing fonts for mozilla's mathml engine mathml version 3.0 - w3c recommendation, 21 october 2010 w3c mathml test suite - designed to check the implementation of each element one attribute (or built-in rendering behavior) at a time in a fairly thorough manner.
BloatView
Mozilla › Performance › BloatView
6113530 2.79% 67064808 9.18% stylecontextimpl 265440 81.19% 283584 -26.99% ctoken 236500 17.32% 306676 20.64% nsstr 217760 14.94% 5817060 7.63% nsxulattribute 113048 -70.92% 113568 -71.16% literalimpl 53280 26.62% 75840 19.40% nsxulelement 51648 0.00% 51648 0.00% nsprofile 51224 0.00% 51224 0.00% nsframe 47568 -26.15% 48096 -50.49% cssdeclarationimpl 42984 0.67% 43488 0.67% this "delta report" shows the leak offenders, sorted from most leaks to fewest.
about:memory
Mozilla › Performance › about:memory
�� frames │ ├───0.89 mb (03.33%) ── style-contexts │ ├───0.62 mb (02.33%) ── rule-nodes │ ├───0.56 mb (02.10%) ── pres-contexts │ ├───0.47 mb (01.75%) ── line-boxes │ └───0.04 mb (00.14%) ── text-runs ├───6.53 mb (24.39%) ── style-sheets ├───5.59 mb (20.89%) -- dom │ ├──3.39 mb (12.66%) ── element-nodes │ ├──1.56 mb (05.84%) ── text-nodes │ ├──0.54 mb (02.03%) ── other │ └──0.10 mb (00.36%) ++ (4 tiny) └───0.06 mb (00.21%) ── property-tables some of the trees in this section measure things that do not cross-cut the measurements in the "explicit" tree, such as those in the "preference-service" example above.
javascript.options.strict
Mozilla › Preferences › Preference reference › javascript.options.strict
var name2= "peter"; document.getelementbyid("sample").innerhtml = name1; </script> </body> </html> possible values and their effects: true: show javascript errors and warnings.
Linked Lists
Mozilla › Projects › NSPR › Reference › Linked Lists
the api is a set of macros for initializing a circular (doubly linked) list, inserting and removing elements from the list.
PR_GetDefaultIOMethods
Mozilla › Projects › NSPR › Reference › PR GetDefaultIOMethods
description after using pr_getdefaultiomethods to identify the default i/o methods table, you can select elements from that table with which to build your own layer's methods table.
PR_LIST_HEAD
Mozilla › Projects › NSPR › Reference › PR LIST HEAD
returns a pointer to a list element.
PR_LIST_TAIL
Mozilla › Projects › NSPR › Reference › PR LIST TAIL
returns a pointer to a list element.
Cryptography functions
Mozilla › Projects › NSS › Cryptography functions
ndslotbyname mxr 3.2 and later pk11_findslotsbynames mxr 3.9 and later pk11_fortezzahaskea mxr 3.2 and later pk11_fortezzamapsig mxr 3.2 and later pk11_freeslot mxr 3.2 and later pk11_freeslotlist mxr 3.2 and later pk11_freeslotlistelement mxr 3.11 and later pk11_freesymkey mxr 3.2 and later pk11_generatefortezzaiv mxr 3.2 and later pk11_generatekeypair mxr 3.2 and later pk11_generatekeypairwithflags mxr 3.10.2 and later pk11_generatekeypairwithopflags mxr 3.12 and later ...
NSS_3.12.1_release_notes.html
Mozilla › Projects › NSS › NSS 3.12.1 release notes.html
bug 439123: assertion failure in libpkix at shutdown bug 440062: incorrect list element count in pkix_list_appenditem function bug 442618: eliminate dead function cert_certpackagetype bug 443755: extra semicolon in pkm_tlskeyandmacderive makes conditional code unconditional bug 443760: extra semicolon in seqdatabase makes static analysis tool suspicious bug 448323: certutil -k doesn't report the token and slot names for found keys bug 448324: ocsp checker returns incorrect...
NSS 3.24 release notes
Mozilla › Projects › NSS › NSS 3.24 release notes
new elements this section lists and briefly describes the new functions, types, and macros in nss 3.24.
NSS functions
Mozilla › Projects › NSS › Reference › NSS functions
ndslotbyname mxr 3.2 and later pk11_findslotsbynames mxr 3.9 and later pk11_fortezzahaskea mxr 3.2 and later pk11_fortezzamapsig mxr 3.2 and later pk11_freeslot mxr 3.2 and later pk11_freeslotlist mxr 3.2 and later pk11_freeslotlistelement mxr 3.11 and later pk11_freesymkey mxr 3.2 and later pk11_generatefortezzaiv mxr 3.2 and later pk11_generatekeypair mxr 3.2 and later pk11_generatekeypairwithflags mxr 3.10.2 and later pk11_generatekeypairwithopflags mxr 3.12 and later ...
Installing Pork
Mozilla › Projects › Pork › Installing
to tell mcpp which gcc installation to integrate itself with, place the selected gcc bin dir as the first element of your path: path=/bindir/of/my/gcc:$path if you want to use a gcc that has binaries named something other than "gcc" and "g++", or you use "ccache" for you main gcc installation and want mcpp to override a separate installation, you need to pass the options "cc=gccxxx cxx=g++xxx" to "./configure".
Rhino FAQ
Mozilla › Projects › Rhino › FAQ
for instance, to create an array of java.lang.string of length five, do var stringarray = java.lang.reflect.array.newinstance(java.lang.string, 5); then if you wish to assign the string "hi" to the first element, simply execute stringarray[0] = "hi".
Creating JavaScript jstest reftests
Mozilla › Projects › SpiderMonkey › Creating JavaScript tests › jsreftests
it is easy to make a test silently pass; anyone who has written js code for the web has written this kind of if-statement: if (typeof gc === 'function') { var arr = []; arr[10000] = 'item'; gc(); asserteq(arr[10000], 'item', 'gc must not wipe out sparse array elements'); } else { print('test skipped: no gc function'); } reportcompare(0, 0, 'ok'); handling abnormal test terminations some tests can terminate abnormally even though the test has technically passed.
How to embed the JavaScript engine
Mozilla › Projects › SpiderMonkey › How to embed the JavaScript engine
// js_callfunctionname(cx, global, "func", 2, argv.begin(), rval.address()); js_callfunctionname(cx, global, "func", argv, &rval); example say the click event is for the top-most or focused ui element at position (x, y): jsobject *target, *event; js::autovaluearray<1> argv(cx); /* * find event target and make event object to represent this click.
Statistics API
Mozilla › Projects › SpiderMonkey › Internals › GC › Statistics API
each element of the slices array is an object with these fields: slice: integer - the slice index, starting at 0.
JS::Add*Root
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS::Add Root
vp/rp is the address of a c/c++ variable (or field, or array element) of type js::value, jsstring *, jsobject *, or jsscript *.
JS::CompileFunction
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS::CompileFunction
nargs is the number of arguments the function takes, and argnames is a pointer to the first element of an array of names to assign each argument.
JSConstDoubleSpec
Mozilla › Projects › SpiderMonkey › JSAPI reference › JSConstDoubleSpec
jsprop_index: property is actually an array element.
JSDeletePropertyOp
Mozilla › Projects › SpiderMonkey › JSAPI reference › JSDeletePropertyOp
this is either a string (unicode property identifier) or an integer (element index).
JSFastNative
Mozilla › Projects › SpiderMonkey › JSAPI reference › JSFastNative
this points to element 0 of an array of argc jsvals, the arguments supplied by the caller.
JSPropertyOp
Mozilla › Projects › SpiderMonkey › JSAPI reference › JSPropertyOp
this is either a string (unicode property identifier) or an integer (element index).
JS_Add*Root
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS AddRoot
vp/spp/opp/rp is the address of a c/c++ variable (or field, or array element) of type jsstring *, jsobject *, or jsval.
JS_CompileFunction
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS CompileFunction
nargs is the number of arguments the function takes, and argnames is a pointer to the first element of an array of names to assign each argument.
JS_CompileFunctionForPrincipals
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS CompileFunctionForPrincipals
nargs is the number of arguments the function takes, and argnames is a pointer to the first element of an array of names to assign each argument.
JS_ConvertArguments
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS ConvertArguments
each element of the array indicates the c type into which to convert the next available js value.
JS_DefineObject
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS DefineObject
use js_defineproperty or js_defineelement to create a property without creating a new object.
JS_DefineProperty
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS DefineProperty
see also mxr id search for js_defineproperty mxr id search for js_defineucproperty mxr id search for js_definepropertybyid js_defineelement bug 461163 bug 1113369 -- added desc and result parameters ...
JS_Enumerate
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS Enumerate
on success, js_enumerate returns a pointer to the first element of an array of property ids.
JS_ForwardGetPropertyTo
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS ForwardGetPropertyTo
syntax bool js_forwardgetpropertyto(jscontext *cx, js::handleobject obj, js::handleid id, js::handleobject onbehalfof, js::mutablehandlevalue vp); bool js_forwardgetelementto(jscontext *cx, js::handleobject obj, uint32_t index, js::handleobject onbehalfof, js::mutablehandlevalue vp); name type description cx jscontext * a context.
JS_GetStringChars
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS GetStringChars
description js_getstringchars obsolete since javascript 1.8.5 returns a pointer to the first element of an array of jschars.
JS_HasArrayLength
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS HasArrayLength
see also js_defineelement js_deleteelement js_getarraylength js_getelement js_isarrayobject js_lookupelement js_newarrayobject js_setarraylength js_setelement bug 657298 ...
JS_MakeStringImmutable
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS MakeStringImmutable
applications must call js_makestringimmutable before sharing a jsstring among threads by storing it in a c/c++ variable, field, or array element that another thread can read.
JS_New
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS New
obsolete since jsapi 32 argv jsval * pointer to the element 0 of an array of argument values to pass to the constructor.
JS_NewExternalString
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS NewExternalString
chars const char16_t * or const jschar * pointer to the first element of an array of char16_ts.
JS_ReportOutOfMemory
Mozilla › Projects › SpiderMonkey › JSAPI reference › JS ReportOutOfMemory
when a script tries to grow an array beyond 230-1 elements, for example, or concatenate strings such that the result is more than 229-1 characters long, the javascript engine reports an error as though by calling this function.
Property attributes
Mozilla › Projects › SpiderMonkey › JSAPI reference › Property attributes
mxr id search for jsprop_permanent jsprop_propop_accessors passed to js_define(uc)property* and js_defineelement if getters/setters are jspropertyop/jsstrictpropertyop added in spidermonkey 38.
jschar
Mozilla › Projects › SpiderMonkey › JSAPI reference › jschar
jschar is the type of javascript "characters", the 16-bit elements that make up strings.
SpiderMonkey 38
Mozilla › Projects › SpiderMonkey › Releases › 38
s_executescriptversion (bug 1095660) js_getflatstringchars (bug 1037869) js_getfunctioncallback (bug 1103269) js_getinternedstringchars (bug 1037869) js_getinternedstringcharsandlength (bug 1037869) js_getstringcharsandlength (bug 1037869) js_getstringcharsz (bug 1037869) js_getstringcharszandlength (bug 1037869) js_gettypename (bug 1037718) js_isabouttobefinalized (bug 650161) js_lookupelement (bug 1094176) js_lookupproperty (bug 1094176) js_lookuppropertybyid (bug 1094176) js_lookupucproperty (bug 1094176) js_newpropertyiterator (bug 1081660) js_nextproperty (bug 1081660) js_resolvestub (bug 1103152) js_setfinalizecallback (bug 996785) js_setfunctioncallback (bug 1103269) jschar (bug 1063962) api changes jschar, a typedef for the standard c++ type char16_t, has been remove...
SpiderMonkey 45
Mozilla › Projects › SpiderMonkey › Releases › 45
n (bug 1178581) js_internucstring renamed to js_atomizeandpinucstring (bug 1178581) deleted apis js_getcompartmentstats js_seticumemoryfunctions js_isgcmarkingtracer js_ismarkinggray js_idarraylength js_idarrayget js_destroyidarray js_defaultvalue js_getparent js_setparent js::parsepropertydescriptorobject js_deleteproperty2 js_deletepropertybyid2 js_deleteucproperty2 js_deleteelement2 js_newfunctionbyid js_bindcallable js_decompilefunctionbody js_getlatin1internedstringchars js_gettwobyteinternedstringchars js_newdateobjectmsec js_cleardatecaches changed apis js_init has moved from jsapi.h to js/initialization.h js_shutdown has moved from jsapi.h to js/initialization.h js_initreflect is now implicit js_addweakpointercallback is replaced with js_addweakpointerzo...
WebReplayRoadmap
Mozilla › Projects › WebReplayRoadmap
media elements (bug 1304146) web audio (bug 1304147) webrtc (bug 1304149) webassembly (bug 1481007) webgl (bug 1506467) support more operating systems (not yet implemented) only macos is supported right now.
Mozilla Projects
Mozilla › Projects
internet explorer also supports the ability to edit specific elements using the contenteditable attribute; starting with firefox 3, gecko also supports contenteditable.
Redis Tips
Mozilla › Redis Tips
in addition to getting elements by their rank in the zset, you can get them by score.
Gecko Roles
Mozilla › Tech › Accessibility › AT-APIs › Gecko › Roles
role_grip represents a special mouse pointer, which allows a user to manipulate user interface elements such as windows.
AT APIs Support
Mozilla › Tech › Accessibility › AT-APIs
developing a xul window is not that different from developing a web page, but the elements available to add widgets are more powerful and designed to be similar to desktop widgets.
Accessibility API Implementation Details
Mozilla › Tech › Accessibility
xforms accessibilitythis article provides a quick guide to how accessibility is handled in gecko for xforms.xul accessibilitythis article shows how xul control elements are mapped to accessibility api.
Using the Places history service
Mozilla › Tech › Places › Using the Places history service
modifying pages in history nsiglobalhistory2.setpagetitle: called by gecko when the <title> element is encountered.
Finishing the Component
Mozilla › Tech › XPCOM › Guide › Creating components › Finishing the Component
the other method on the nsicontentpolicy interface is for blocking processing of specific elements in a document, but our policy is more restrictive: if the url isn't on the white list, the entire page should be blocked.
Using XPCOM Components
Mozilla › Tech › XPCOM › Guide › Creating components › Using XPCOM Components
managing cookies from javascript var cmgr = components.classes["@mozilla.org/cookiemanager;1"] .getservice(); cmgr = cmgr.queryinterface(components.interfaces.nsicookiemanager); function loadcookies() { // load cookies into a table var enumerator = cmgr.enumerator; var count = 0; var showpolicyfield = false; while (enumerator.hasmoreelements()) { var nextcookie = enumerator.getnext(); nextcookie = nextcookie.queryinterface(components.interfaces.nsicookie); /* ....
Creating XPCOM components
Mozilla › Tech › XPCOM › Guide › Creating components
rn values in xpcom xpidl code generation getting the weblock service from a client implementing the iweblock interface the directory service modifying paths with nsifile manipulating files with nsifile using nsilocalfile for reading data processing the white list data iweblock method by method lock and unlock addsite removesite setsites getnext getsites hasmoreelements finishing the component using frozen interfaces copying interfaces into your build environment implementing the nsicontentpolicy interface receiving notifications implementing the nsicontentpolicy uniform resource locators checking the white list creating nsiuri objects building the weblock ui user interface package list client code overview xul the ...
Mozilla internal string guide
Mozilla › Tech › XPCOM › Guide › Internal strings
mozilla::bulkwritehandle<t> autoconverts to a writable mozilla::span<t> and also provides explicit access to itself as span (asspan()) or via component accessors named consistently with those on span: elements() and length() the latter is not the logical length of the string but the writable length of the buffer.
Interfacing with the XPCOM cycle collector
Mozilla › Tech › XPCOM › Interfacing with the XPCOM cycle collector
you can see an example of their use in some more complicated classes such as content/base/src/nsgenericelement.cpp.
Components.classesByID
Mozilla › Tech › XPCOM › Language Bindings › Components.classesByID
components.classesbyid is exactly like components.classes except that the elements are indexed by the canonical form of their cid, and does not only represent the component classes that have been registered with the component manager using a contractid, but also those registered using a plain cid.
Components.interfacesByID
Mozilla › Tech › XPCOM › Language Bindings › Components.interfacesByID
components.interfacesbyid is exactly like components.interfaces except that the elements are indexed by the canonical form of their iid.
Components.utils.Sandbox
Mozilla › Tech › XPCOM › Language Bindings › Components.utils.Sandbox
so this can be simply an array with a single element.
Components.utils.evalInWindow
Mozilla › Tech › XPCOM › Language Bindings › Components.utils.evalInWindow
example suppose a page script defines a variable: // page-script.js var somelocalvariable = { name: "selection1", node: document.documentelement }; an add-on script or other privileged script can access the variable using evalinwindow(): // add-on-script.js var result = components.utils.evalinwindow("somelocalvariable", contentwindow); console.log(result); // {"name":"selection1","node":{}} the add-on code can modify the variable as well, of course: // add-on-script.js components.utils.evalinwindow("somelocalvariable.newprop = 42", cont...
XPConnect wrappers
Mozilla › Tech › XPCOM › Language Bindings › XPConnect › XPConnect wrappers
this includes all dom objects (including window) and chrome elements that are reflected into javascript.
Observer Notifications
Mozilla › Tech › XPCOM › Observer Notifications
document-element-inserted document null sent immediately after the root element of a document has been created, but before executing any script on it.
NS_InitXPCOM3
Mozilla › Tech › XPCOM › Reference › Core functions › NS InitXPCOM3
astaticmodulecount [in] the number of elements in astaticmodules.
BeginReading
Mozilla › Tech › XPCOM › Reference › Glue classes › nsACString › BeginReading
« xpcom api reference summary the beginreading function returns a const pointer to the first element of the string's internal buffer.
EndReading
Mozilla › Tech › XPCOM › Reference › Glue classes › nsACString › EndReading
« xpcom api reference summary the endreading function returns a const char_type pointer to the element just beyond the last element of the string's internal buffer.
BeginReading
Mozilla › Tech › XPCOM › Reference › Glue classes › nsAString › BeginReading
« xpcom api reference summary the beginreading function returns a const pointer to the first element of the string's internal buffer.
EndReading
Mozilla › Tech › XPCOM › Reference › Glue classes › nsAString › EndReading
« xpcom api reference summary the endreading function returns a const char_type pointer to the element just beyond the last element of the string's internal buffer.
imgIRequest
Mozilla › Tech › XPCOM › Reference › Interface › imgIRequest
if an html img element has the crossorigin attribute set, the imgirequest will be validated for cross-origin usage with cors, and, if successful, will have its cors mode set to the relevant type.
mozIColorAnalyzer
Mozilla › Tech › XPCOM › Reference › Interface › mozIColorAnalyzer
void findrepresentativecolor( in nsiuri imageuri, in mozirepresentativecolorcallback callback ); parameters imageuri a uri pointing to the image - ideally a data: uri, but any scheme that will load when setting the src attribute of a dom img element should work.
mozISpellCheckingEngine
Mozilla › Tech › XPCOM › Reference › Interface › mozISpellCheckingEngine
this will be either element from the array returned by getdictionarylist() or an empty string if no dictionary is selected.
mozIStorageAggregateFunction
Mozilla › Tech › XPCOM › Reference › Interface › mozIStorageAggregateFunction
class standarddeviationfunc : public mozistorageaggregatefunction { public: ns_imethod onstep(mozistoragevaluearray *aarguments) { print32 value; nsresult rv = aarguments->getint32(&value); ns_ensure_success(rv, rv); mnumbers.appendelement(value); } ns_imethod onfinal(nsivariant **_result) { print64 total = 0; for (pruint32 i = 0; i < mnumbers.length(); i++) total += mnumbers[i]; print32 mean = total / mnumbers.length(); nstarray<print64> data(mnumbers); for (pruint32 i = 0; i < data.length(); i++) { print32 value = data[i] - mean; data[i] = value * value; } total = 0; for ...
mozITXTToHTMLConv
Mozilla › Tech › XPCOM › Reference › Interface › mozITXTToHTMLConv
kstructphrase unsigned long enables conversion of text attributes, such as converting "*some text*" to boldfaced "some text" by wrapping in the html <strong> element.
innerHTML
Mozilla › Tech › XPCOM › Reference › Interface › nsIAccessNode › InnerHTML
for the dom property, see element.innerhtml.
GroupPosition
Mozilla › Tech › XPCOM › Reference › Interface › nsIAccessible › GroupPosition
refer to accessible web specifications to get an idea what elements expose group information.
Role
Mozilla › Tech › XPCOM › Reference › Interface › nsIAccessible › Role
« nsiaccessible page summary enumerated accessible role for the associated element.
nsIAccessibleEvent
Mozilla › Tech › XPCOM › Reference › Interface › nsIAccessibleEvent
server applications send this event when a user needs to know that a user interface element has changed.
nsIAccessibleRole
Mozilla › Tech › XPCOM › Reference › Interface › nsIAccessibleRole
role_grip 4 represents a special mouse pointer, which allows a user to manipulate user interface elements such as windows.
nsIAppShellService
Mozilla › Tech › XPCOM › Reference › Interface › nsIAppShellService
to get an out of process element you want to communicate with via message manager, then append a browser element with remote attribute set to true.
nsIBrowserBoxObject
Mozilla › Tech › XPCOM › Reference › Interface › nsIBrowserBoxObject
inherits from: nsicontainerboxobject last changed in gecko 1.9 (firefox 3) the boxobject belonging to a xul browser element implements this interface.
nsIContainerBoxObject
Mozilla › Tech › XPCOM › Reference › Interface › nsIContainerBoxObject
1.0 66 introduced gecko 1.9 inherits from: nsisupports last changed in gecko 1.9 (firefox 3) the boxobject belonging to a xul browser, editor or iframe element implements this interface.
nsIContentViewManager
Mozilla › Tech › XPCOM › Reference › Interface › nsIContentViewManager
pixels are in chrome device pixels and are relative to the browser element.
nsIDOMClientRect
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMClientRect
it is returned by functions like element.getboundingclientrect.
nsIDOMHTMLTimeRanges
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMHTMLTimeRanges
the nsidomhtmltimeranges interface represents a set of time ranges in media; it's primarily used by the nsidomhtmlmediaelement interface, and implements the dom timeranges interface.
nsIDOMNode
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMNode
constants constant value description element_node 1 attribute_node 2 text_node 3 cdata_section_node 4 entity_reference_node 5 entity_node 6 processing_instruction_node 7 comment_node 8 document_node 9 document_type_node 10 document_fragment_node 11 notation_node 12 methods appendchild() nsidomnode appendchild( in nsidomnode newchild ); parameters newchild return value clonenode() nsido...
nsIDOMProgressEvent
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMProgressEvent
1.0 66 introduced gecko 1.9.1 deprecated gecko 22 inherits from: nsidomevent last changed in gecko 1.9.1 (firefox 3.5 / thunderbird 3.0 / seamonkey 2.0) the nsidomprogressevent is used in the media elements (<video> and <audio>) to inform interested code of the progress of the media download.
nsIDOMWindow2
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMWindow2
it represents a single window object that may contain child windows if the document in the window contains an html frameset document, or if the document contains <iframe> elements.
nsIDOMWindowInternal
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMWindowInternal
fullscreen boolean whether the window is displayed in full screen mode or not frameelement nsidomelement readonly: the element in which the window is embedded, or null if the window is top-level.
nsIDOMXPathEvaluator
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMXPathEvaluator
to evaluate against a whole document, use the document.documentelement.
nsIDOMXPathExpression
Mozilla › Tech › XPCOM › Reference › Interface › nsIDOMXPathExpression
to evaluate against a whole document, use the document.documentelement method to get the node to evaluate against.
nsIDialogCreator
Mozilla › Tech › XPCOM › Reference › Interface › nsIDialogCreator
1.0 66 introduced gecko 2.0 inherits from: nsisupports last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) method overview void opendialog(in unsigned long atype, in acstring aname, in acstring afeatures, in nsidialogparamblock aarguments, [optional] in nsidomelement aframeelement); constants constant value description unknown_dialog 0 generic_dialog 1 select_dialog 2 methods opendialog() void opendialog( in unsigned long atype, in acstring aname, in acstring afeatures, in nsidialogparamblock aarguments, in nsidomelement aframeelement optional ); parameters atype aname afeatures aarguments aframeelement optional ...
getFiles
Mozilla › Tech › XPCOM › Reference › Interface › nsIDirectoryServiceProvider2 › getFiles
return values the elements of the returned nsisimpleenumerator instance must support nsifile and may support nsilocalfile.
nsIDirectoryServiceProvider2
Mozilla › Tech › XPCOM › Reference › Interface › nsIDirectoryServiceProvider2
the elements in the enumeration are nsifile.
nsIEditorBoxObject
Mozilla › Tech › XPCOM › Reference › Interface › nsIEditorBoxObject
inherits from: nsicontainerboxobject last changed in gecko 1.9 (firefox 3) the boxobject belonging to a xul editor element implements this interface.
nsIEventListenerService
Mozilla › Tech › XPCOM › Reference › Interface › nsIEventListenerService
acount on return, contains the number of elements in the returned array.
nsIFeed
Mozilla › Tech › XPCOM › Reference › Interface › nsIFeed
1.0 66 introduced gecko 1.8 inherits from: nsifeedcontainer last changed in gecko 1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) attributes attribute type description cloud nsiwritablepropertybag2 the cloud element on a feed is used to identify the api endpoint of an rsscloud ping server, which distributes notifications of changes to this feed.
nsIFeedContainer
Mozilla › Tech › XPCOM › Reference › Interface › nsIFeedContainer
toolkit/components/feeds/public/nsifeedcontainer.idlscriptable this interface provides standard fields used by both feeds (nsifeed) and feed entries (nsifeedentry) 1.0 66 introduced gecko 1.8 inherits from: nsifeedelementbase last changed in gecko 1.8.1 (firefox 2 / thunderbird 2 / seamonkey 1.1) method overview void normalize(); attributes attribute type description authors nsiarray an array of nsifeedperson objects describing the authors of the feed or entry.
nsIFeedGenerator
Mozilla › Tech › XPCOM › Reference › Interface › nsIFeedGenerator
1.0 66 introduced gecko 1.8 inherits from: nsifeedelementbase last changed in gecko 1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) attributes attribute type description agent astring the name of the software that created the feed.
nsIFilePicker
Mozilla › Tech › XPCOM › Reference › Interface › nsIFilePicker
var files = fp.files; var paths = []; while (files.hasmoreelements()) { var arg = files.getnext().queryinterface(components.interfaces.nsilocalfile).path; paths.push(arg); } ...
nsIFileView
Mozilla › Tech › XPCOM › Reference › Interface › nsIFileView
iate id is passed, nsifileview relies on the treecols section --> <treecol id="filenamecolumn" label="name" flex="1" primary="true"/> <treecol id="lastmodifiedcolumn" label="date" flex="1"/> <treecol id="size" label="size" flex="1"/> </treecols> <treechildren/> </tree> <script> var dir="/home/"; //the directory to be opened var ftree = document.getelementbyid("ftree"); //the xul tree element var lfile = components.classes["@mozilla.org/file/local;1"] .createinstance(components.interfaces.nsilocalfile); lfile.initwithpath(dir); // open the directory var fview = components.classes["@mozilla.org/filepicker/fileview;1"] .createinstance(components.interfaces.nsifileview); //create an instance of the component tview = fview.q...
nsIFrameScriptLoader
Mozilla › Tech › XPCOM › Reference › Interface › nsIFrameScriptLoader
if you want a frame script to do something whenever a new document is loaded, you can listen for the document-element-inserted notification.
nsIIFrameBoxObject
Mozilla › Tech › XPCOM › Reference › Interface › nsIIFrameBoxObject
inherits from: nsicontainerboxobject last changed in gecko 1.9 (firefox 3) the boxobject belonging to a xul iframe element implements this interface.
nsILoadGroup
Mozilla › Tech › XPCOM › Reference › Interface › nsILoadGroup
enumerator element type: nsirequest.
nsILoginInfo
Mozilla › Tech › XPCOM › Reference › Interface › nsILoginInfo
for logins obtained from html forms, this field is the action attribute from the form element, with the path removed (for example, "https://www.site.com").
nsIMenuBoxObject
Mozilla › Tech › XPCOM › Reference › Interface › nsIMenuBoxObject
bird 1.5 / seamonkey 1.0) to get access to the box object for a given menu, use code like this: var boxobject = xulmenu.boxobject.queryinterface(components.interfaces.nsimenuboxobject); method overview boolean handlekeypress(in nsidomkeyevent keyevent); void openmenu(in boolean openflag); attributes attribute type description activechild nsidomelement the currently active menu or menuitem child of the menu box.
Building an Account Manager Extension
Mozilla › Tech › XPCOM › Reference › Interface › nsIMsgAccountManagerExtension › Building an Account Manager Extension
the xul file needs a page element as root element, with a special on load command.
nsIMsgAccountManagerExtension
Mozilla › Tech › XPCOM › Reference › Interface › nsIMsgAccountManagerExtension
a panel consists of a xul file with a page element as root element and the property file containing the localized name.
nsIMsgDBView
Mozilla › Tech › XPCOM › Reference › Interface › nsIMsgDBView
each element of the array is an nsmsgviewindex which is defined as a unsigned long in mailnewstypes2.idl.
nsINavHistoryObserver
Mozilla › Tech › XPCOM › Reference › Interface › nsINavHistoryObserver
both titles are always included in this notification, even though only one is changed each time it is called, since often consumers will want to display the user title if available, falling back to the title specified by the page's <title> element if there is no user title.
nsINavHistoryQueryResultNode
Mozilla › Tech › XPCOM › Reference › Interface › nsINavHistoryQueryResultNode
there are querycount elements in the array.
nsINavHistoryResultTreeViewer
Mozilla › Tech › XPCOM › Reference › Interface › nsINavHistoryResultTreeViewer
method overview nsinavhistoryresultnode nodefortreeindex(in unsigned long aindex); unsigned long treeindexfornode(in nsinavhistoryresultnode anode); attributes attribute type description collapseduplicates boolean controls whether duplicate adjacent elements are collapsed into a single item in the tree.
nsIPlacesView
Mozilla › Tech › XPCOM › Reference › Interface › nsIPlacesView
getremovableselectionranges() returns an array whose elements are themselves arrays of nsinavhistoryresultnode objects that can be removed from the view.
Component; nsIPrefBranch
Mozilla › Tech › XPCOM › Reference › Interface › nsIPrefBranch
acount optional from gecko 2.0 receives the number of elements in the array.
nsIPropertyBag
Mozilla › Tech › XPCOM › Reference › Interface › nsIPropertyBag
inherits from: nsisupports last changed in gecko 1.0 method overview nsivariant getproperty(in astring name); attributes attribute type description enumerator nsisimpleenumerator get a nsisimpleenumerator whose elements are nsiproperty objects.
nsIStringBundleOverride
Mozilla › Tech › XPCOM › Reference › Interface › nsIStringBundleOverride
return value an enumeration of nsipropertyelement objects for the keys that are overridden in the given string bundle.
nsISupports proxies
Mozilla › Tech › XPCOM › Reference › Interface › nsISupports proxies
now xpinstall can do its installations while the product renders, but now xpinstall can not access ui elements such as a progress meter or a confirmation dialog.
nsITransferable
Mozilla › Tech › XPCOM › Reference › Interface › nsITransferable
contains the serialized ancestor elements.
nsITreeColumn
Mozilla › Tech › XPCOM › Reference › Interface › nsITreeColumn
element nsidomelement the treecol element.
nsIUTF8StringEnumerator
Mozilla › Tech › XPCOM › Reference › Interface › nsIUTF8StringEnumerator
the "next" element is the first string upon the first call.
nsIWebContentHandlerRegistrar
Mozilla › Tech › XPCOM › Reference › Interface › nsIWebContentHandlerRegistrar
.getservice(ci.nsiwebcontenthandlerregistrar); var htmlcontentwindow = undefined; var registeruri = 'http://mail.live.com/secure/start?action=compose&to=%s'; var myurihostname = services.io.newuri(registeruri, null, null).host; // this section here is long and daunting, but its just finding a suitable contentwindow var domwindows = services.wm.getenumerator(null); while (domwindows.hasmoreelements()) { var adomwindow = domwindows.getnext(); if (adomwindow.gbrowser) { if (adomwindow.gbrowser.tabcontainer) { //adomwindow has tabs var tabs = adomwindow.gbrowser.tabcontainer.childnodes; for (var i = 0; i < tabs.length; i++) { console.log(tabs[i].linkedbrowser.contentwindow.location); if (tabs[i].linkedbrowser.
nsIWebProgressListener
Mozilla › Tech › XPCOM › Reference › Interface › nsIWebProgressListener
this includes other document requests (for example corresponding to html <iframe> elements).
nsIWinTaskbar
Mozilla › Tech › XPCOM › Reference › Interface › nsIWinTaskbar
they don't even have to represent actual gui elements on the window.
nsIXULBuilderListener
Mozilla › Tech › XPCOM › Reference › Interface › nsIXULBuilderListener
n object which implements nsixulbuilderlistener: var mylistener = { queryinterface: function(aiid) { if (aiid.equals(components.interfaces.nsixulbuilderlistener) || aiid.equals(components.interfaces.nsisupports)) return this; throw components.results.ns_nointerface; }, willrebuild : function(builder) {}, didrebuild : function(builder) { } } attach the listener to a element: myelement.addlistener(mylistener); ...
nsIXULWindow
Mozilla › Tech › XPCOM › Reference › Interface › nsIXULWindow
nsidocshelltreeitem getcontentshellbyid( in wstring id ); parameters id the id of the content shell, which is the same as the "type" attribute on the containing frame element.
nsIZipWriter
Mozilla › Tech › XPCOM › Reference › Interface › nsIZipWriter
r_create_file creates file if it dne //pr_rdwr opens for reading and writing //recursviely add all var dirarr = [dir]; //adds dirs to this as it finds it for (var i=0; i<dirarr.length; i++) { cu.reporterror('adding contents of dir['+i+']: ' + dirarr[i].leafname + ' path: ' + dirarr[i].path); var direntries = dirarr[i].directoryentries; while (direntries.hasmoreelements()) { var entry = direntries.getnext().queryinterface(ci.nsifile); //entry is instance of nsifile so here https://developer.mozilla.org/docs/xpcom_interface_reference/nsifile if (entry.path == xpi.path) { cu.reporterror('skipping entry - will not add this entry to the zip file - as this is the zip itself: "' + xpi.path + '" leafname:"' + xpi.leafname + '"'); ...
NS_CStringGetMutableData
Mozilla › Tech › XPCOM › Reference › String functions › NS CStringGetMutableData
it returns a pointer to the first element of an array of characters that may be modified in-place.
Setting HTTP request headers
Mozilla › Tech › XPCOM › Setting HTTP request headers
you can add your own http headers to any request the application makes, whether the request is initiated by your code explicitly opening an http channel, because of xmlhttprequest activity, an <img> element in content, or even from css.
Reference Manual
Mozilla › Tech › XPCOM › Using nsCOMPtr › Reference Manual
you're more likely to see it in a form like this nscomptr<nsifoo> foo( do_queryinterface(alist->elementat(i)) ); // |elementat|, like all good getters, |addrefs| it's result // which would be dropped on the floor, after querying it for the needed // interface bugzilla bug 8221 is specifically about finding and fixing this particular kind of leak.
Using nsIPasswordManager
Mozilla › Tech › XPCOM › Using nsIPasswordManager
the example below should serve as a starting point: // the host name of the password we are looking for var querystring = 'http://www.example.com'; // ask the password manager for an enumerator: var e = passwordmanager.enumerator; // step through each password in the password manager until we find the one we want: while (e.hasmoreelements()) { try { // get an nsipassword object out of the password manager.
Using nsISimpleEnumerator
Mozilla › Tech › XPCOM › Using nsISimpleEnumerator
using nsisimpleenumerator <stringbundle>.strings var enumerator = document.getelementbyid('astringbundleid').strings; var s = ""; while (enumerator.hasmoreelements()) { var property = enumerator.getnext().queryinterface(components.interfaces.nsipropertyelement); s += property.key + ' = ' + property.value + ';\n'; } alert(s); example using javascript 1.7 features // creates a generator iterating over enum's values function generatorfromsimpleenumerator(enum, interface) { while (enum.hasmoreelements()) { yield enum.getnext().queryinterface(interface); } } var b = document.getelementbyid("stringbundleset").firstchild var props = generatorfromenumerator(b.strings, components.interfaces.nsipropertyelement); var s = ""; for (let property in props) { s += property.key + ' =...
Using the clipboard
Mozilla › Tech › XPCOM › Using the clipboard
please note: the sourcewindow variable is a placeholder for whatever window owns the data being copied -- from any dom element you can obtain it via element.ownerdocument.defaultview.
nsIMsgCloudFileProvider
Mozilla › Thunderbird › Filelink Providers › nsIMsgCloudFileProvider
afirstname, in acstring alastname, in nsirequestobserver acallback); void createexistingaccount(in nsirequestobserver acallback); acstring providerurlforerror(in unsigned long aerror); attributes attribute type description type acstring readonly: the type is a unique string identifier which can be used by interface elements for styling.
Filelink Providers
Mozilla › Thunderbird › Filelink Providers
for example, the hightail implementation provides the following function: function extraargs() { var usernamevalue = document.getelementbyid("username").value; return { "username": {type: "char", value: usernamevalue}, }; } in this example, the username value is read from the input, and then the specially-crafted object is returned.
Mail and RDF
Mozilla › Thunderbird › Mail and RDF
in the document's onload= handler the datasources are attached to their respective widgets by setting the database property on each rdf template's parent element.
Thunderbird Configuration Files
Mozilla › Thunderbird › Thunderbird Configuration Files
userchrome.css this file sets the display rules for various elements in the thunderbird user interface and is located in the sub-folder called chrome in your profile folder.
Adding items to the Folder Pane
Mozilla › Thunderbird › Thunderbird extensions › Adding items to the Folder Pane
the following code snippet listens for that event: let gnumbersext = { load: function gne_load() { window.removeeventlistener("load", gnumbersext.load, false); let tree = document.getelementbyid("foldertree"); tree.addeventlistener("maprebuild", gnumbersext._insert, false); }, _insert: function gne__insert() { // this function is called when a rebuild occurs } }; window.addeventlistener("load", gnumbersext.load, true); the structure of folder-tree-items the folder pane stores its current display data in a property called _rowmap.
Demo Addon
Mozilla › Thunderbird › Thunderbird extensions › Demo Addon
it lets you iterate over any collection and transforms your collection elements in the given objects, to use fixiterator, you have to import it with cu.import("resource:///modules/iteratorutils.jsm");.
Access StringBundle from Overlay
Mozilla › Thunderbird › Thunderbird extensions › HowTos › Common Thunderbird Extension Techniques › Access StringBundle from Overlay
the most efficient way to append these strings is by attaching them to an existing stringbundleset as such: <stringbundleset id="stringbundleset"> <stringbundle src="chrome://your_extension/locale/overlay.properties" id="your-extension-strings" /> </stringbundleset> now that your stringbundle is attached you can access it from javascript as follows: var str = document.getelementbyid("your-extension-strings"); //get the stringbundle object itself str.getstring("propertyname"); //get a string (and do something with it) alternative way let stringbundleservice = cc["@mozilla.org/intl/stringbundle;1"].getservice(ci.nsistringbundleservice); let bundle = stringbundleservice.createbundle("chrome://your_extension/locale/overlay.properties"); l...
Access Thunderbird Window Areas
Mozilla › Thunderbird › Thunderbird extensions › HowTos › Common Thunderbird Extension Techniques › Access Thunderbird Window Areas
an alternative to these methods is to directly access the element by it's id as in the detect when a folder opens example.
Add New Tab
Mozilla › Thunderbird › Thunderbird extensions › HowTos › Common Thunderbird Extension Techniques › Add New Tab
var aurl = "chrome://myext/mytab.xul"; let tabmail = getmail3pane().document.getelementbyid("tabmail"); tabmail.opentab("chrometab", { chromepage: aurl }); ...
Detect Opening Folder
Mozilla › Thunderbird › Thunderbird extensions › HowTos › Common Thunderbird Extension Techniques › Detect Opening Folder
to do this you need to capture the select event of the folder [[xul:tree|tree]] whose id is (conveniently) foldertree like so: window.document.getelementbyid('foldertree').addeventlistener("select", testcolumns, false); ...
customDBHeaders Preference
Mozilla › Thunderbird › Thunderbird extensions › customDBHeaders Preference
nts.interfaces.nsiobserver observe: function(amsgfolder, atopic, adata) { dump("here here!"); addcustomcolumnhandler(); } } function doonceloaded(){ var observerservice = components.classes["@mozilla.org/observer-service;1"].getservice(components.interfaces.nsiobserverservice); observerservice.addobserver(createdbobserver, "msgcreatedbview", false); window.document.getelementbyid('foldertree').addeventlistener("select",addcustomcolumnhandler,false); } window.addeventlistener("load",doonceloaded,false); dump(" ~ ~ ~ ~ end superfluous ~ ~ ~ ~ \n"); important be aware that only messages that are added to the .msf database after the customdbheaders pref is set will have the corresponding string property set on the msghdr.
Memory Management
Mozilla › js-ctypes › Using js-ctypes › Memory Management
what won't keep objects alive it's important to note that getting direct access to the contents of a cdata object using address(), addressofelement(), or contents, will result in a cdata object that does not hold its referent alive.
CData
Mozilla › js-ctypes › js-ctypes reference › CData
arcode = [] for (var i=0; i<ptrasarr.length; i++) { //if known_len is correct, then will not hit null terminator so like in example of "_scratchpad/entehandle.js at master · noitidart/_scratchpad mdnfirefox" if you pass length of 77, then null term will not get hit by this loop as null term is at pos 77 and we go till `< known_len` var thisunsignedcharcode = ptrasarr.addressofelement(i).contents; if (thisunsignedcharcode == 0) { // reached null terminator, break console.log('reached null terminator, at pos: ', i); break; } charcode.push(thisunsignedcharcode); fromcharcode.push(string.fromcharcode(thisunsignedcharcode)); } console.info('charcode:', charcode); ...
UInt64
Mozilla › js-ctypes › js-ctypes reference › UInt64
arithmetic operations const uint64 = ctypes.uint64; const int64 = ctypes.int64; function ensureuint64(aarr) { // makes elements in aarr a uint64 if it can be made, else throws for (var i=0; i<aarr.length; i++) { var ccon = aarr[i].constructor.name; if (ccon != 'uint64') { if (['string', 'number'].indexof(ccon) > -1) { aarr[i] = uint64(aarr[i]); } else { throw new error('invalid type at position ' + i + ' it must be a n...
Blocking By Domain - Plugins
Plugins › Blocking By Domain
any attempt to use a plugin (via the <object> or <embed> element) will behave as if the plugin was not installed, and use fallback content as specified by the html standard.
Streams - Plugins
Plugins › Guide › Streams
the browser can create a stream for several different types of data: for the file specified in the data attribute of the object element or the src attribute of the embed element for a data file for a full-page instance the npp_newstream method has the following syntax: nperror npp_newstream(npp instance, npmimetype type, npstream *stream, npbool seekable, uint16* stype); the instance parameter refers to the plug-in instance receiving the stream; the type parameter represents the stream's mime type.
Gecko Plugin API Reference - Plugins
Plugins › Guide
ications how plug-ins work understanding the runtime model plug-in detection how gecko finds plug-ins checking plug-ins by mime type overview of plug-in structure understanding the plug-in api plug-ins and platform independence windowed and windowless plug-ins the default plug-in using html to display plug-ins plug-in display modes using the object element for plug-in display nesting rules for html elements using the appropriate attributes using the embed element for plug-in display using custom embed attributes plug-in references plug-in development overview writing plug-ins registering plug-ins ms windows unix mac os x drawing a plug-in instance handling memory sending and receiving streams working wit...
Inspecting web app manifests - Firefox Developer Tools
Tools › Application › Manifests
when you open the application panel’s manifest view on a page that doesn't have an app manifest successfully deployed, you'll get the following output shown: deploying a manifest to get a manifest deployed successfully, you need to include a <link> element in the <head> of your document that points to your .webmanifest file: <link rel="manifest" href="/manifest.webmanifest"> the .webmanifest extension is recommended in the spec, and should be served with an application/manifest+json mime type, although browsers generally tend to support manifests with other appropriate extensions like .json (mime type: application/json).
DOM Property Viewer - Firefox Developer Tools
Tools › DOM Property Viewer
if a property has more elements than this, you'll see a "more..." annotation, and will need to click the property to see all elements.
Access debugging in add-ons - Firefox Developer Tools
Tools › Debugger › How to › Access debugging in add-ons
ndow.addeventlistener("debugger:editorunloaded") relevant files: chrome://browser/content/devtools/debugger-controller.js chrome://browser/content/devtools/debugger-toolbar.js chrome://browser/content/devtools/debugger-view.js chrome://browser/content/devtools/debugger-panes.js unfortunately there is not yet any api to evaluate watches/expressions within the debugged scope, or highlight elements on the page that are referenced as variables in the debugged scope.
Debug eval sources - Firefox Developer Tools
Tools › Debugger › How to › Debug eval sources
in the video below, we load a page containing a source like this: var script = `function foo() { console.log('called foo'); } //# sourceurl=my-foo.js`; eval(script); var button = document.getelementbyid("foo"); button.addeventlistener("click", foo, false); the evaluated string is given the name "my-foo.js" using the //# sourceurl directive.
Set event listener breakpoints - Firefox Developer Tools
Tools › Debugger › Set event listener breakpoints
if however you have multiple elements, all of which have event listeners attached that you want to break on, this becomes an enormous time saver.
Debugger.Environment - Firefox Developer Tools
Tools › Debugger-API › Debugger.Environment
the global object and dom elements appear in the chain of environments via object environments.
Tutorial: Show Allocations Per Call Path - Firefox Developer Tools
Tools › Debugger-API › Tutorial-Allocation-Log-Tree
</div> <script> function makefactory(type) { return function factory(content) { var elt = document.createelement(type); elt.textcontent = content; return elt; }; } var divfactory = makefactory('div'); var spanfactory = makefactory('span'); function divsandspans() { for (i = 0; i < 10; i++) { var div = divfactory('div #' + i); div.appendchild(spanfactory('span #' + i)); document.body.appendchild(div); } } function dodivsandspans() { divsandspans(); } <...
Debugger-API - Firefox Developer Tools
Tools › Debugger-API
a debugger.source can furnish a full copy of its source code, and explain how the code entered the system, whether via a call to eval, a <script> element, or otherwise.
Deprecated tools - Firefox Developer Tools
Tools › Deprecated tools
canvas debugger bugzilla issue: bug 1403938 removed as of firefox 67 description canvas debugger allowed users to inspect the canvas element and see how frequently a given function is called.
Monster example - Firefox Developer Tools
Tools › Memory › Monster example
": [], "fierce": [], "undecided": [] }; for (var i = 0; i &lt; monster_count; i++) { monsters.friendly.push(new monster()); } for (var i = 0; i &lt; monster_count; i++) { monsters.fierce.push(new monster()); } for (var i = 0; i &lt; monster_count; i++) { monsters.undecided.push(new monster()); } console.log(monsters); } var makemonstersbutton = document.getelementbyid("make-monsters"); makemonstersbutton.addeventlistener("click", makemonsters); the page contains a button: when you push the button, the code creates some monsters.
Edit CSS filters - Firefox Developer Tools
Tools › Page Inspector › How to › Edit CSS filters
you can then apply saved filters to new elements.
Examine and edit the box model - Firefox Developer Tools
Tools › Page Inspector › How to › Examine and edit the box model
viewing the box model with the select element button pressed, if you hover over an element in the page, the box model for the element is shown overlaid on the page: it's also shown overlaid if you hover over an element's markup in the html pane: if the element is inline and is split over multiple line boxes, the highlighter shows each individual line box that together make up the element: the box model view when an element's selected, you can get a detailed look at the box model in the box model view: if you hover over a value, you'll see a tooltip telling you which rule the value comes from: if you hover over part of the box model in the box model view, the corresponding part of the page is highlighted: editing the box model you can also edit the values in the box mo...
Examine Event Listeners - Firefox Developer Tools
Tools › Page Inspector › How to › Examine event listeners
the inspector shows the word "event" next to elements in the html pane, that have event listeners bound to them: click the icon, then you'll see a popup listing all the event listeners bound to this element: each line contains: a right-pointing arrowhead; click to expand the row and show the listener function source code a curved arrow pointing to a stack; click it to show the code for the handler in the debugger the name of the event for which a handler was attached to this element the name and line number for the listener; you can also click here to expand the row and view the listener function source code a label indicating whether the event bubbles a label indicating the system that defines the event.
Inspect and select colors - Firefox Developer Tools
Tools › Page Inspector › How to › Inspect and select colors
the color picker includes an eyedropper icon: clicking this icon enables you to use the eyedropper to select a new color for the element from the page: clicking the color sample while holding down the shift key changes the color format: ...
Open the Inspector - Firefox Developer Tools
Tools › Page Inspector › How to › Open the Inspector
right-click an element on a web page and select inspect element.
Use the Inspector API - Firefox Developer Tools
Tools › Page Inspector › How to › Use the Inspector API
.node - returns the actual element from the page .window - the window object of the frame the selection is in.
Animation inspector example: CSS transitions - Firefox Developer Tools
Tools › Page Inspector › How to › Work with animations › Animation inspector example: CSS transitions
{ opacity: 1; width: 300px; } javascript content function toggleselection(e) { if (e.button != 0) { return; } if (e.target.classlist.contains("icon")) { var wasselected = (e.target.getattribute("id") == "selected"); clearselection(); if (!wasselected) { e.target.setattribute("id", "selected"); } } } function clearselection() { var selected = document.getelementbyid("selected"); if (selected) { selected.removeattribute("id"); } } document.addeventlistener("click", toggleselection); ...
Animation inspector example: Web Animations API - Firefox Developer Tools
Tools › Page Inspector › How to › Work with animations › Animation inspector example: Web Animations API
offset: 0.666 }, { transform: 'scale(1.5)', filter: 'grayscale(0%)'} ]; var notekeyframeset = [ { opacity: '0', width: '0'}, { opacity: '1', width: '300px'} ]; var iconkeyframeoptions = { duration: 750, fill: 'forwards', easing: 'ease-in', enddelay: 100 } var notekeyframeoptions = { duration: 500, fill: 'forwards', easing: 'ease-out', delay: 150 } var icon = document.getelementbyid("icon"); var note = document.getelementbyid("note"); var iconanimation = icon.animate(iconkeyframeset, iconkeyframeoptions); var noteanimation = note.animate(notekeyframeset, notekeyframeoptions); iconanimation.pause(); noteanimation.pause(); var firsttime = true; function animatechannel(e) { if (e.button != 0) { return; } if (e.target.id != "icon") { return; } if (first...
How to - Firefox Developer Tools
Tools › Page Inspector › How to
css flexbox inspector: examine flexbox layoutscss grid inspector: examine grid layoutsedit css filtersedit shape paths in cssedit fontsexamine event listenersexamine and edit cssexamine and edit htmlexamine and edit the box modelinspect and select colorsopen the inspectorreposition elements in the pageselect an elementselect and highlight elementsuse the inspector apiuse the inspector from the web consoleview background imagesvisualize transformswork with animations ...
Page Inspector - Firefox Developer Tools
Tools › Page Inspector
how to to find out what you can do with the inspector, see the following how to guides: open the inspector examine and edit html examine and edit the box model inspect and select colors reposition elements in the page edit fonts visualize transforms use the inspector api select an element examine and edit css examine event listeners work with animations edit css filters edit css shapes view background images use the inspector from the web console examine css grid layouts examine css flexbox layouts reference keyboard shortcuts settings ...
Frame rate - Firefox Developer Tools
Tools › Performance › Frame rate
for example, if moving the mouse over some page element triggers some javascript that changes the element's appearance, and that triggers a reflow and a repaint, then all this work needs to be completed in that frame.
View Source - Firefox Developer Tools
Tools › View source
for example, putting a <div> element as a child of a <ul> element isn't a parse error, but it is not valid html.
Split console - Firefox Developer Tools
Tools › Web Console › Split console
as usual, $0 works as a shorthand for the element currently selected in the inspector: when you use the split console with the debugger, the console's scope is the currently executing stack frame.
Web Console remoting - Firefox Developer Tools
Tools › Web Console › remoting
oleapicall packet to the client: { "from": "conn0.console9", "type": "consoleapicall", "message": { "level": "error", "filename": "http://localhost/~mihai/mozilla/test.html", "linenumber": 149, "functionname": "", "timestamp": 1347302713771, "private": false, "arguments": [ "error omg aloha ", { "type": "object", "classname": "htmlbodyelement", "actor": "conn0.consoleobj20" }, " 960 739 3.141592653589793 %a", "zuzu", { "type": "null" }, { "type": "undefined" } ] } } similar to how we send the page errors, here we send the actual console event received from the nsiobserverservice.
Firefox Developer Tools
Tools
taking screenshots take a screenshot of the entire page or of a single element.
ANGLE_instanced_arrays.vertexAttribDivisorANGLE() - Web APIs
Web › API › ANGLE instanced arrays › vertexAttribDivisorANGLE
the angle_instanced_arrays.vertexattribdivisorangle() method of the webgl api modifies the rate at which generic vertex attributes advance when rendering multiple instances of primitives with ext.drawarraysinstancedangle() and ext.drawelementsinstancedangle().
AbstractWorker - Web APIs
Web › API › AbstractWorker
this code assumes that there's an <input> element represented by first; an event handler for the change event is established so that when the user changes the value of first, a message is posted to the worker to let it know.
AddressErrors - Web APIs
Web › API › AddressErrors
window.addeventlistener("load", function(ev) { document.getelementbyid("pay").addeventlistener("click", process, false); }, false); see addeventlistener() for information about event handlers and how they work.
AnalyserNode - Web APIs
Web › API › AnalyserNode
analyser.fftsize = 2048; var bufferlength = analyser.frequencybincount; var dataarray = new uint8array(bufferlength); analyser.getbytetimedomaindata(dataarray); // get a canvas defined with id "oscilloscope" var canvas = document.getelementbyid("oscilloscope"); var canvasctx = canvas.getcontext("2d"); // draw an oscilloscope of the current audio source function draw() { requestanimationframe(draw); analyser.getbytetimedomaindata(dataarray); canvasctx.fillstyle = "rgb(200, 200, 200)"; canvasctx.fillrect(0, 0, canvas.width, canvas.height); canvasctx.linewidth = 2; canvasctx.strokestyle = "rgb(0, 0, 0)"; canvasctx.
Animation.finish() - Web APIs
Web › API › Animation › finish
interfaceelement.addeventlistener("mousedown", function() { try { player.finish(); } catch(e if e instanceof invalidstate) { console.log("finish() called on paused or finished animation."); } catch(e); logmyerrors(e); //pass exception object to error handler } }); the following example finishes all the animations on a single element, regardless of their direction of playback.
Animation.finished - Web APIs
Web › API › Animation › finished
examples the following code waits until all animations running on the element elem have finished, then deletes the element from the dom tree: promise.all( elem.getanimations().map( function(animation) { return animation.finished } ) ).then( function() { return elem.remove(); } ); specifications specification status comment web animationsthe definition of 'animation.finished' in that specification.
Animation.onfinish - Web APIs
Web › API › Animation › onfinish
here is one instance where we add pointer events back to an element after its opacity animation has faded it in: // add an animation to the game's ending credits var endingui = document.getelementbyid("ending-ui"); var bringui = endingui.animate(keysfade, timingfade); // pause said animation's credits bringui.pause(); // this function removes pointer events on the credits.
Animation.pause() - Web APIs
Web › API › Animation › pause
example animation.pause() is used many times in the alice in web animations api land growing/shrinking alice game, largely because animations created with the element.animate() method immediately start playing and must be paused manually if you want to avoid that: // animation of the cupcake slowly getting eaten up var nommingcake = document.getelementbyid('eat-me_sprite').animate( [ { transform: 'translatey(0)' }, { transform: 'translatey(-80%)' } ], { fill: 'forwards', easing: 'steps(4, end)', duration: alicechange.effect.timing.duration / 2 })...
Animation.play() - Web APIs
Web › API › Animation › play
two animation.play()s, one eventlistener: // the cake has its own animation: var nommingcake = document.getelementbyid('eat-me_sprite').animate( [ { transform: 'translatey(0)' }, { transform: 'translatey(-80%)' } ], { fill: 'forwards', easing: 'steps(4, end)', duration: alicechange.effect.timing.duration / 2 }); // pause the cake's animation so it doesn't play immediately.
AnimationEffect.getComputedTiming() - Web APIs
Web › API › AnimationEffect › getComputedTiming
these values are comparable to the computed styles of an element returned using window.getcomputedstyle(elem).
Attr.localName - Web APIs
Web › API › Attr › localName
html content <button id="example">click me</button> javascript content const element = document.queryselector("#example"); element.addeventlistener("click", function() { const attribute = element.attributes[0]; alert(attribute.localname); }); notes the local name of an attribute is the part of the attribute's qualified name that comes after the colon.
AudioBuffer - Web APIs
Web › API › AudioBuffer
for longer sounds, objects implementing the mediaelementaudiosourcenode are more suitable.
AudioContextLatencyCategory - Web APIs
Web › API › AudioContextLatencyCategory
"interactive" the audio is involved in interactive elements, such as responding to user actions or needing to coincide with visual cues such as a video or game action.
AudioContextOptions - Web APIs
Web › API › AudioContextOptions
"interactive" the audio is involved in interactive elements, such as responding to user actions or needing to coincide with visual cues such as a video or game action.
AudioDestinationNode.maxChannelCount - Web APIs
Web › API › AudioDestinationNode › maxChannelCount
example the following would set up a simple audio graph, featuring an audiodestinationnode with maxchannelcount of 2: var audioctx = new audiocontext(); var source = audioctx.createmediaelementsource(mymediaelement); source.connect(gainnode); audioctx.destination.maxchannelcount = 2; gainnode.connect(audioctx.destination); to see a more complete implementation, check out one of our mdn web audio examples, such as voice-change-o-matic or violent theremin.
AudioDestinationNode - Web APIs
Web › API › AudioDestinationNode
their speakers), so you can get it hooked up inside an audio graph using only a few lines of code: var audioctx = new audiocontext(); var source = audioctx.createmediaelementsource(mymediaelement); source.connect(gainnode); gainnode.connect(audioctx.destination); to see a more complete implementation, check out one of our mdn web audio examples, such as voice-change-o-matic or violent theremin.
AudioNode.connect() - Web APIs
Web › API › AudioNode › connect
for example, you might send the audio from a mediaelementaudiosourcenode—that is, the audio from an html5 media element such as <audio>—through a band pass filter implemented using a biquadfilternode to reduce noise before then sending the audio along to the speakers.
AudioNode - Web APIs
Web › API › AudioNode
an html <audio> or <video> element, an oscillatornode, etc.), the audio destination, intermediate processing module (e.g.
AudioParam.exponentialRampToValueAtTime() - Web APIs
Web › API › AudioParam › exponentialRampToValueAtTime
audiocontext; var audioctx = new audiocontext(); // set basic variables for example var myaudio = document.queryselector('audio'); var pre = document.queryselector('pre'); var myscript = document.queryselector('script'); pre.innerhtml = myscript.innerhtml; var exprampplus = document.queryselector('.exp-ramp-plus'); var exprampminus = document.queryselector('.exp-ramp-minus'); // create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a gain node and set its gain value to 0.5 var gainnode = audioctx.creategain(); // connect the audiobuffersourcenode to the gainnode // and the gainnode to the destination gainnode.gain.setvalueattime(0, audioctx.currenttime); source.connect(gainnode); gainnode.connect(audioctx...
AudioParam.linearRampToValueAtTime() - Web APIs
Web › API › AudioParam › linearRampToValueAtTime
; var audioctx = new audiocontext(); // set basic variables for example var myaudio = document.queryselector('audio'); var pre = document.queryselector('pre'); var myscript = document.queryselector('script'); pre.innerhtml = myscript.innerhtml; var linearrampplus = document.queryselector('.linear-ramp-plus'); var linearrampminus = document.queryselector('.linear-ramp-minus'); // create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a gain node and set it's gain value to 0.5 var gainnode = audioctx.creategain(); // connect the audiobuffersourcenode to the gainnode // and the gainnode to the destination gainnode.gain.setvalueattime(0, audioctx.currenttime); source.connect(gainnode); gainnode.connect(audioct...
AudioParam.setTargetAtTime() - Web APIs
Web › API › AudioParam › setTargetAtTime
bkitaudiocontext; var audioctx = new audiocontext(); // set basic variables for example var myaudio = document.queryselector('audio'); var pre = document.queryselector('pre'); var myscript = document.queryselector('script'); pre.innerhtml = myscript.innerhtml; var attimeplus = document.queryselector('.at-time-plus'); var attimeminus = document.queryselector('.at-time-minus'); // create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a gain node and set it's gain value to 0.5 var gainnode = audioctx.creategain(); gainnode.gain.value = 0.5; var currgain = gainnode.gain.value; // connect the audiobuffersourcenode to the gainnode // and the gainnode to the destination source.connect(gainnode); gainnode.connect...
AudioParam.setValueCurveAtTime() - Web APIs
Web › API › AudioParam › setValueCurveAtTime
o context var audiocontext = window.audiocontext || window.webkitaudiocontext; var audioctx = new audiocontext(); // set basic variables for example var myaudio = document.queryselector('audio'); var pre = document.queryselector('pre'); var myscript = document.queryselector('script'); pre.innerhtml = myscript.innerhtml; var valuecurve = document.queryselector('.value-curve'); // create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a gain node and set it's gain value to 0.5 var gainnode = audioctx.creategain(); gainnode.gain.value = 0.5; var currgain = gainnode.gain.value; // connect the audiobuffersourcenode to the gainnode // and the gainnode to the destination source.connect(gainnode); gainnode.connect...
AudioScheduledSourceNode: ended event - Web APIs
Web › API › AudioScheduledSourceNode › ended event
examples in this simple example, an event listener for the ended event is set up to enable a "start" button in the user interface when the node stops playing: node.addeventlistener('ended', () => { document.getelementbyid("startbutton").disabled = false; }) you can also set up the event handler using the audioscheduledsourcenode.onended property: node.onended = function() { document.getelementbyid("startbutton").disabled = false; } for an example of the ended event in use, see our audio-buffer example on github.
AudioScheduledSourceNode.onended - Web APIs
Web › API › AudioScheduledSourceNode › onended
node.onended = function(event) { document.getelementbyid("startbutton").disabled = false; } specifications specification status comment web audio apithe definition of 'onended' in that specification.
AudioTrack.label - Web APIs
Web › API › AudioTrack › label
example this example returns an array of track kinds and labels for potential use in a user interface to select audio tracks for a specified media element.
AudioTrack.language - Web APIs
Web › API › AudioTrack › language
example this example locates all of a media element's primary language and translated audio tracks and returns a list of objects containing each of those tracks' id, kind, and language.
AudioTrackList: addtrack event - Web APIs
Web › API › AudioTrackList › addtrack event
bubbles no cancelable no interface trackevent event handler property onaddtrack examples using addeventlistener(): const videoelement = document.queryselector('video'); videoelement.audiotracks.addeventlistener('addtrack', (event) => { console.log(`audio track: ${event.track.label} added`); }); using the onaddtrack event handler property: const videoelement = document.queryselector('video'); videoelement.audiotracks.onaddtrack = (event) => { console.log(`audio track: ${event.track.label} added`); }; specifications specification status html living standardthe definition of 'addtrack' in that specification.
AudioTrackList.getTrackById() - Web APIs
Web › API › AudioTrackList › getTrackById
function disablecharacter(videoelem, charactername) { videoelem.audiotracks.gettrackbyid(charactername).enabled = false; } this short function gets the audiotracklist containing the video's audio tracks using htmlmediaelement.audiotracks, then calls gettrackbyid() on it, specifying the character's name.
AudioTrackList: removetrack event - Web APIs
Web › API › AudioTrackList › removetrack event
bubbles no cancelable no interface trackevent event handler property onremovetrack examples using addeventlistener(): const videoelement = document.queryselector('video'); videoelement.audiotracks.addeventlistener('removetrack', (event) => { console.log(`audio track: ${event.track.label} removed`); }); using the onremovetrack event handler property: const videoelement = document.queryselector('video'); videoelement.audiotracks.onremovetrack = (event) => { console.log(`audio track: ${event.track.label} removed`); }; specifications specification status html living standardthe definition of 'removetrack' in that specification.
AuthenticatorAssertionResponse - Web APIs
Web › API › AuthenticatorAssertionResponse
use from within an <iframe> element will not have any effect.
AuthenticatorAttestationResponse.getTransports() - Web APIs
Web › API › AuthenticatorAttestationResponse › getTransports
the elements of this array are supposed to be in lexicographical order.
AuthenticatorAttestationResponse - Web APIs
Web › API › AuthenticatorAttestationResponse
use from within an <iframe> element will not have any effect.
BaseAudioContext.createDynamicsCompressor() - Web APIs
Web › API › BaseAudioContext › createDynamicsCompressor
// create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalue...
BaseAudioContext.decodeAudioData() - Web APIs
Web › API › BaseAudioContext › decodeAudioData
source.loop = true; }, function(e){ console.log("error with decoding audio data" + e.err); }); } request.send(); } // wire up buttons to stop and play audio play.onclick = function() { getdata(); source.start(0); play.setattribute('disabled', 'disabled'); } stop.onclick = function() { source.stop(0); play.removeattribute('disabled'); } // dump script to pre element pre.innerhtml = myscript.innerhtml; new promise-based syntax ctx.decodeaudiodata(audiodata).then(function(decodeddata) { // use the decoded data here }); specifications specification status comment web audio apithe definition of 'decodeaudiodata()' in that specification.
Beacon API - Web APIs
Web › API › Beacon API
one such technique is to delay the unload to submit data by creating an image element and setting its src attribute within the unload handler.
Blob.type - Web APIs
Web › API › Blob › type
var i, fileinput, files, allowedfiletypes; // fileinput is a htmlinputelement: <input type="file" multiple id="myfileinput"> fileinput = document.getelementbyid("myfileinput"); // files is a filelist object (simliar to nodelist) files = fileinput.files; // our application only allows gif, png, and jpeg images allowedfiletypes = ["image/png", "image/jpeg", "image/gif"]; for (i = 0; i < files.length; i++) { // test if file.type is an allowed file type.
BluetoothRemoteGATTCharacteristic - Web APIs
Web › API › BluetoothRemoteGATTCharacteristic
the bluetoothremotegattcharacteristic interface of the web bluetooth api represents a gatt characteristic, which is a basic data element that provides further information about a peripheral’s service.
Body.arrayBuffer() - Web APIs
Web › API › Body › arrayBuffer
if you need to play ogg during downloading (stream it) - consider htmlaudioelement: new audio("music.ogg").play(); in getdata() we create a new request using the request() constructor, then use it to fetch an ogg music track.
Body.blob() - Web APIs
Web › API › Body › blob
when the fetch is successful, we read a blob out of the response using blob(), put it into an object url using url.createobjecturl, and then set that url as the source of an <img> element to display the image.
Body.body - Web APIs
Web › API › Body › body
const image = document.getelementbyid('target'); // fetch the original image fetch('./tortoise.png') // retrieve its body as readablestream .then(response => response.body) .then(body => { const reader = body.getreader(); return new readablestream({ start(controller) { return pump(); function pump() { return reader.read().then(({ done, value }) => { // when no more data needs to be consume...
Body.bodyUsed - Web APIs
Web › API › Body › bodyUsed
when the fetch is successful, we read a blob out of the response using blob(), put it into an object url using url.createobjecturl, and then set that url as the source of an <img> element to display the image.
BroadcastChannel: message event - Web APIs
Web › API › BroadcastChannel › message event
there are two "receiver" iframes that listen to the broadcast message and write the result into a <div> element.
CSS.escape() - Web APIs
Web › API › CSS › escape
sults css.escape(".foo#bar") // "\.foo\#bar" css.escape("()[]{}") // "\(\)\[\]\{\}" css.escape('--a') // "--a" css.escape(0) // "\30 ", the unicode code point of '0' is 30 css.escape('\0') // "\ufffd", the unicode replacement character in context uses to escape a string for use as part of a selector, the escape() method can be used: var element = document.queryselector('#' + css.escape(id) + ' > img'); the escape() method can also be used for escaping strings, although it escapes characters that don't strictly need to be escaped: var element = document.queryselector('a[href="#' + css.escape(fragment) + '"]'); specification specification status comment css object model (cssom)the definition of 'css.escape()' i...
CSS numeric factory functions - Web APIs
Web › API › CSS › factory functions
r); // <resolution> css.dpi(number); css.dpcm(number); css.dppx(number); // <flex> css.fr(number); examples we use the css.vmax() numeric factory function to create a cssunitvalue: let height = css.vmax(50); console.log( height ); // cssunitvalue {value: 50, unit: "vmax"} console.log( height.value ) // 50 console.log( height.unit ) // vmax in this example, we set the margin on our element using the css.px() factory function: myelement.attributestylemap.set('margin', css.px(40)); let currentmargin = myelement.attributestylemap.get('margin'); console.log(currentmargin.value, currentmargin.unit); // 40, 'px' specification specification status comment css object model (cssom)the definition of 'numeric factory functions' in that specification.
CSSKeywordValue.CSSKeywordValue() - Web APIs
Web › API › CSSKeywordValue › CSSKeywordValue
#myelement { display: flex; } <div id="myelement">check the developer tools to see the log in the console and to inspect the style attribute on this div.</div> let keyword = new csskeywordvalue('initial'); let myelement = document.getelementbyid('myelement').attributestylemap; myelement.set('display', keyword); console.log( myelement.get('display').value); // 'initial' console.dir( keyword ); ...
CSSKeywordValue.value - Web APIs
Web › API › CSSKeywordValue › value
let indicator = document.getelementbyid('indicator'); indicator.attributestylemap.set('display', new csskeywordvalue('initial')); indicator.attributestylemap.get('display').value // 'initial' specifications specification status comment css typed om level 1the definition of 'undefined' in that specification.
CSSKeywordValue - Web APIs
Web › API › CSSKeywordValue
#myelement { display: flex; } <div id="myelement">check the developer tools to see the log in the console and to inspect the style attribute on this div.</div> let myelement = document.getelementbyid('myelement').attributestylemap; myelement.set('display', new csskeywordvalue('initial')); console.log( myelement.get('display').value); // 'initial' specifications specification status...
CSSMathSum - Web APIs
Web › API › CSSMathSum
examples we create an element with a width determined using a calc() function, then console.log() the operator and values, and dig into the values a bit.
CSSMathValue.operator - Web APIs
Web › API › CSSMathValue › operator
interface value cssmathsum "sum" cssmathproduct "product" cssmathmin "min" cssmathmax "max" cssmathclamp "clamp" cssmathnegate "negate" cssmathinvert "invert" examples we create an element with a width determined using a calc() function, then console.log() the operator.
CSSMathValue - Web APIs
Web › API › CSSMathValue
examples we create an element with a width determined using a calc() function, then console.log() the operator.
CSSPositionValue.CSSPositionValue() - Web APIs
Web › API › CSSPositionValue › CSSPositionValue
let somediv = document.getelementbyid('container'); let position = new csspositionvalue(css.px(5), css.px(10)); somediv.attributestylemap.set('object-position', position); console.log(position.x.value, position.y.value); // 5 10 ...
CSSPositionValue.x - Web APIs
Web › API › CSSPositionValue › x
let somediv = document.getelementbyid('container'); let position = new csspositionvalue(css.px(5), css.px(10)); somediv.attributestylemap.set('object-position', position); console.log(position.x.value, position.y.value); ...
CSSPositionValue.y - Web APIs
Web › API › CSSPositionValue › y
let replaceel = document.getelementbyid('container'); let position = new csspositionvalue(css.px(5), css.px(10)); somediv.attributestylemap.set('object-position', position); console.log(position.x.value, position.y.value); ...
CSSPositionValue - Web APIs
Web › API › CSSPositionValue
let replacedel = document.getelementbyid( 'image' ); let position = new csspositionvalue( css.px(35), css.px(40) ); replacedel.attributestylemap.set( 'object-position', position ); console.log( position.x.value, position.y.value ); console.log( replacedel.computedstylemap().get('object-position') ); we set the object-position property, then check the values returned.
CSSPrimitiveValue.getRectValue() - Web APIs
Web › API › CSSPrimitiveValue › getRectValue
example var cs = window.getcomputedstyle(document.getelementbyid("clippeddiv")); var cssvalue = cs.getpropertycssvalue("clip"); console.log(cssvalue.getrectvalue()); specifications specification status comment document object model (dom) level 2 style specificationthe definition of 'cssprimitivevalue.getrectvalue' in that specification.
CSSRule.cssText - Web APIs
Web › API › CSSRule › cssText
note: do not confuse this property with element-style cssstyledeclaration.csstext.
CSSStyleDeclaration.item() - Web APIs
Web › API › CSSStyleDeclaration › item
javascript has a special simpler syntax for obtaining an item from a nodelist by index: var propertyname = style[index]; example var style = document.getelementbyid('div1').style; var propertyname = style.item(1); // or simply style[1] - returns the second style listed specifications specification status comment css object model (cssom)the definition of 'cssstyledeclaration.item()' in that specification.
CSSStyleDeclaration.length - Web APIs
Web › API › CSSStyleDeclaration › length
example the following gets the number of explicitly set styles on the following html element: <div id="div1" style="margin: 0 10px; background-color: #ca1; font-family: monospace"></div> javascript code: var mydiv = document.getelementbyid('div1'); var divstyle = mydiv.style; var len = divstyle.length; // 6 specifications specification status comment css object model (cssom)the definition of 'cssstyledeclaration.length' in that specification.
CSSStyleDeclaration - Web APIs
Web › API › CSSStyleDeclaration
a cssstyledeclaration object can be exposed using three different apis: via htmlelement.style, which deals with the inline styles of a single element (e.g., <div style="...">).
CSSStyleSheet.addRule() - Web APIs
Web › API › CSSStyleSheet › addRule
styleblock a domstring indicating the style block to apply to elements matching the selector.
CSSUnparsedValue - Web APIs
Web › API › CSSUnparsedValue
cssunparsedvalue.foreach() executes a provided function once for each element of the cssunparsedvalue object.
Using the CSS properties and values API - Web APIs
Web › API › CSS Properties and Values API › guide
that means both that invalid values won't appear as invalid when inspecting the element's properties, and that including an invalid property after a valid one won't fall back to the valid property.
Cache.matchAll() - Web APIs
Web › API › Cache › matchAll
examples caches.open('v1').then(function(cache) { cache.matchall('/images/').then(function(response) { response.foreach(function(element, index, array) { cache.delete(element); }); }); }) specifications specification status comment service workersthe definition of 'cache: matchall' in that specification.
CanvasCaptureMediaStreamTrack.requestFrame() - Web APIs
Web › API › CanvasCaptureMediaStreamTrack › requestFrame
example // find the canvas element to capture var canvaselt = document.getelementsbytagname("canvas")[0]; // get the stream var stream = canvaselt.capturestream(25); // 25 fps // send the current state of the canvas as a frame to the stream stream.getvideotracks()[0].requestframe(); specifications specification status comment media capture from dom elementsthe definition of 'canvascapturemediastrea...
CanvasGradient.addColorStop() - Web APIs
Web › API › CanvasGradient › addColorStop
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); let gradient = ctx.createlineargradient(0, 0, 200, 0); gradient.addcolorstop(0, 'green'); gradient.addcolorstop(.7, 'white'); gradient.addcolorstop(1, 'pink'); ctx.fillstyle = gradient; ctx.fillrect(10, 10, 200, 100); result specifications specification status comment html living standardthe definition of 'canvasgr...
CanvasImageSource - Web APIs
Web › API › CanvasImageSource
the interfaces that it allows to be used as image sources are the following: htmlimageelement svgimageelement htmlvideoelement htmlcanvaselement imagebitmap offscreencanvas specifications specification status comment html living standardthe definition of 'canvasimagesource' in that specification.
CanvasRenderingContext2D.beginPath() - Web APIs
Web › API › CanvasRenderingContext2D › beginPath
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // first path ctx.beginpath(); ctx.strokestyle = 'blue'; ctx.moveto(20, 20); ctx.lineto(200, 20); ctx.stroke(); // second path ctx.beginpath(); ctx.strokestyle = 'green'; ctx.moveto(20, 20); ctx.lineto(120, 120); ctx.stroke(); result specifications specification status comment html living standardthe definition of...
CanvasRenderingContext2D.clearHitRegions() - Web APIs
Web › API › CanvasRenderingContext2D › clearHitRegions
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // set some hit regions ctx.addhitregion({id: 'eyes'}); ctx.addhitregion({id: 'nose'}); ctx.addhitregion({id: 'mouth'}); // remove them altogether from the canvas ctx.clearhitregions(); specifications canvas hit regions have been removed from the whatwg living standard, although discussions about future standardization are ongoing.
CanvasRenderingContext2D.createLinearGradient() - Web APIs
Web › API › CanvasRenderingContext2D › createLinearGradient
html <canvas id="canvas"></canvas> javascript var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); // create a linear gradient // the start gradient point is at x=20, y=0 // the end gradient point is at x=220, y=0 var gradient = ctx.createlineargradient(20,0, 220,0); // add three color stops gradient.addcolorstop(0, 'green'); gradient.addcolorstop(.5, 'cyan'); gradient.addcolorstop(1, 'green'); // set the fill style and draw a rectangle ctx.
CanvasRenderingContext2D.createRadialGradient() - Web APIs
Web › API › CanvasRenderingContext2D › createRadialGradient
html <canvas id="canvas" width="200" height="200"></canvas> javascript var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); // create a radial gradient // the inner circle is at x=110, y=90, with radius=30 // the outer circle is at x=100, y=100, with radius=70 var gradient = ctx.createradialgradient(110,90,30, 100,100,70); // add three color stops gradient.addcolorstop(0, 'pink'); gradient.addcolorstop(.9, 'white'); gradient.addcolorstop(1, 'green'); // set the fill...
CanvasRenderingContext2D.currentTransform - Web APIs
Web › API › CanvasRenderingContext2D › currentTransform
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); let matrix = ctx.currenttransform; matrix.a = 1; matrix.b = 1; matrix.c = 0; matrix.d = 1; matrix.e = 0; matrix.f = 0; ctx.currenttransform = matrix; ctx.fillrect(0, 0, 100, 100); result ...
CanvasRenderingContext2D.font - Web APIs
Web › API › CanvasRenderingContext2D › font
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.font = 'bold 48px serif'; ctx.stroketext('hello world', 50, 100); result loading fonts with the css font loading api with the help of the fontface api, you can explicitly load fonts before using them in a canvas.
CanvasRenderingContext2D.getImageData() - Web APIs
Web › API › CanvasRenderingContext2D › getImageData
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.rect(10, 10, 100, 100); ctx.fill(); let imagedata = ctx.getimagedata(60, 60, 200, 100); ctx.putimagedata(imagedata, 150, 10); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.getimagedata' in that specification.
CanvasRenderingContext2D.getTransform() - Web APIs
Web › API › CanvasRenderingContext2D › getTransform
examples in the following example, we have two <canvas> elements.
CanvasRenderingContext2D.globalCompositeOperation - Web APIs
Web › API › CanvasRenderingContext2D › globalCompositeOperation
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.globalcompositeoperation = 'xor'; ctx.fillstyle = 'blue'; ctx.fillrect(10, 10, 100, 100); ctx.fillstyle = 'red'; ctx.fillrect(50, 50, 100, 100); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.globalcompositeoperation' in that specification.
CanvasRenderingContext2D.imageSmoothingEnabled - Web APIs
Web › API › CanvasRenderingContext2D › imageSmoothingEnabled
html <canvas id="canvas" width="460" height="210"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.font = '16px sans-serif'; ctx.textalign = 'center'; const img = new image(); img.src = 'https://interactive-examples.mdn.mozilla.net/media/examples/star.png'; img.onload = function() { const w = img.width, h = img.height; ctx.filltext('source', w * .5, 20); ctx.drawimage(img, 0, 24, w, h); ctx.filltext('smoothing = true',...
CanvasRenderingContext2D.imageSmoothingQuality - Web APIs
Web › API › CanvasRenderingContext2D › imageSmoothingQuality
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); let img = new image(); img.src = 'https://mdn.mozillademos.org/files/222/canvas_createpattern.png'; img.onload = function() { ctx.imagesmoothingquality = 'low'; ctx.drawimage(img, 0, 0, 300, 150); }; result specifications specification status comment html living standardthe definition of 'imagesmoothingquality'...
CanvasRenderingContext2D.lineWidth - Web APIs
Web › API › CanvasRenderingContext2D › lineWidth
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.linewidth = 15; ctx.beginpath(); ctx.moveto(20, 20); ctx.lineto(130, 130); ctx.rect(40, 40, 70, 70); ctx.stroke(); result more examples for more examples and explanation about this property, see applying styles and color in the canvas tutorial.
CanvasRenderingContext2D.miterLimit - Web APIs
Web › API › CanvasRenderingContext2D › miterLimit
yable code <canvas id="canvas" width="400" height="200" class="playable-canvas"></canvas> <div class="playable-buttons"> <input id="edit" type="button" value="edit" /> <input id="reset" type="button" value="reset" /> </div> <textarea id="code" class="playable-code"> ctx.beginpath(); ctx.moveto(0,0); ctx.linewidth = 15; ctx.lineto(100, 100); ctx.stroke();</textarea> var canvas = document.getelementbyid("canvas"); var ctx = canvas.getcontext("2d"); var textarea = document.getelementbyid("code"); var reset = document.getelementbyid("reset"); var edit = document.getelementbyid("edit"); var code = textarea.value; function drawcanvas() { ctx.clearrect(0, 0, canvas.width, canvas.height); eval(textarea.value); } reset.addeventlistener("click", function() { textarea.value = code; drawcanv...
CanvasRenderingContext2D.moveTo() - Web APIs
Web › API › CanvasRenderingContext2D › moveTo
var canvas = document.getelementbyid('canvas'); var ctx = canvas.getcontext('2d'); ctx.beginpath(); ctx.moveto(50, 50); // begin first sub-path ctx.lineto(200, 50); ctx.moveto(50, 90); // begin second sub-path ctx.lineto(280, 120); ctx.stroke(); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.moveto' in that specification.
CanvasRenderingContext2D.rect() - Web APIs
Web › API › CanvasRenderingContext2D › rect
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.rect(10, 20, 150, 100); ctx.fill(); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.rect' in that specification.
CanvasRenderingContext2D.removeHitRegion() - Web APIs
Web › API › CanvasRenderingContext2D › removeHitRegion
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // set a hit region ctx.addhitregion({id: 'eyes'}); // remove it from the canvas ctx.removehitregion('eyes'); specifications canvas hit regions have been removed from the whatwg living standard, although discussions about future standardization are ongoing.
CanvasRenderingContext2D.restore() - Web APIs
Web › API › CanvasRenderingContext2D › restore
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // save the default state ctx.save(); ctx.fillstyle = 'green'; ctx.fillrect(10, 10, 100, 100); // restore the default state ctx.restore(); ctx.fillrect(150, 40, 100, 100); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.restore' in that specifica...
CanvasRenderingContext2D.save() - Web APIs
Web › API › CanvasRenderingContext2D › save
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // save the default state ctx.save(); ctx.fillstyle = 'green'; ctx.fillrect(10, 10, 100, 100); // restore the default state ctx.restore(); ctx.fillrect(150, 40, 100, 100); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.save' in that specificatio...
CanvasRenderingContext2D.setTransform() - Web APIs
Web › API › CanvasRenderingContext2D › setTransform
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.settransform(1, .2, .8, 1, 0, 0); ctx.fillrect(0, 0, 100, 100); result retrieving and passing a dommatrix object in the following example, we have two <canvas> elements.
CanvasRenderingContext2D.shadowBlur - Web APIs
Web › API › CanvasRenderingContext2D › shadowBlur
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // shadow ctx.shadowcolor = 'red'; ctx.shadowblur = 15; // rectangle ctx.fillstyle = 'blue'; ctx.fillrect(20, 20, 150, 100); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.shadowblur' in that specification.
CanvasRenderingContext2D.shadowOffsetX - Web APIs
Web › API › CanvasRenderingContext2D › shadowOffsetX
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // shadow ctx.shadowcolor = 'red'; ctx.shadowoffsetx = 25; ctx.shadowblur = 10; // rectangle ctx.fillstyle = 'blue'; ctx.fillrect(20, 20, 150, 100); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.shadowoffsetx' in that specification.
CanvasRenderingContext2D.shadowOffsetY - Web APIs
Web › API › CanvasRenderingContext2D › shadowOffsetY
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // shadow ctx.shadowcolor = 'red'; ctx.shadowoffsety = 25; ctx.shadowblur = 10; // rectangle ctx.fillstyle = 'blue'; ctx.fillrect(20, 20, 150, 80); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.shadowoffsety' in that specification.
CanvasRenderingContext2D.textBaseline - Web APIs
Web › API › CanvasRenderingContext2D › textBaseline
html <canvas id="canvas" width="550" height="500"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const baselines = ['top', 'hanging', 'middle', 'alphabetic', 'ideographic', 'bottom']; ctx.font = '36px serif'; ctx.strokestyle = 'red'; baselines.foreach(function (baseline, index) { ctx.textbaseline = baseline; const y = 75 + index * 75; ctx.beginpath(); ctx.moveto(0, y + 0.5); ctx.lineto(550, y + 0.5); ctx.stroke(); ctx.fillte...
CanvasRenderingContext2D.transform() - Web APIs
Web › API › CanvasRenderingContext2D › transform
html <canvas id="canvas"></canvas> javascript const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); ctx.transform(1, .2, .8, 1, 0, 0); ctx.fillrect(0, 0, 100, 100); result specifications specification status comment html living standardthe definition of 'canvasrenderingcontext2d.transform' in that specification.
CanvasRenderingContext2D.translate() - Web APIs
Web › API › CanvasRenderingContext2D › translate
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); // moved square ctx.translate(110, 30); ctx.fillstyle = 'red'; ctx.fillrect(0, 0, 80, 80); // reset current transformation matrix to the identity matrix ctx.settransform(1, 0, 0, 1, 0, 0); // unmoved square ctx.fillstyle = 'gray'; ctx.fillrect(0, 0, 80, 80); result the moved square is red, and the unmoved square is gray.
Clipboard.read() - Web APIs
Web › API › Clipboard › read
otherwise, an image element referred to using the variable imgelem has its source replaced with the clipboard's contents.
Clipboard API - Web APIs
Web › API › Clipboard API
accessing the clipboard instead of creating a clipboard object through instantiation, you access the system clipboard through the navigator.clipboard global: navigator.clipboard.readtext().then( cliptext => document.queryselector(".editor").innertext += cliptext); this snippet fetches the text from the clipboard and appends it to the first element found with the class editor.
Credential Management API - Web APIs
Web › API › Credential Management API
calls to get() and store() within an <iframe> element will resolve without effect.
CredentialsContainer.get() - Web APIs
Web › API › CredentialsContainer › get
calls to it within an <iframe> element will resolve without effect.
CredentialsContainer.store() - Web APIs
Web › API › CredentialsContainer › store
calls to it within an <iframe> element will resolve without effect.
Crypto.getRandomValues() - Web APIs
Web › API › Crypto › getRandomValues
all elements in the array are overwritten with random numbers.
CryptoKey - Web APIs
Web › API › CryptoKey
possible values for array elements are: "encrypt": the key may be used to encrypt messages.
DOMConfiguration - Web APIs
Web › API › DOMConfiguration
pre-defined parameters: "canonical-form", "cdata-sections", "check-character-normalization", "comments", "datatype-normalization", "element-content-whitespace", "entities", "error-handler", "infoset", "namespaces", "namespace-declarations", "normalize-characters","schema-location", "schema-type", "split-cdata-sections", "validate", "validate-if-schema", "well-formed" properties domconfiguration.parameternames read only is a domstringlist methods domconfiguration.cansetparameter() returns a boolean domconfiguration.getparameter() returns a domuserdata domconfiguration.setparameter() sets a parameter specification http://www.w3.org/tr/dom-level-3-cor...mconfiguration ...
DOMMatrix - Web APIs
Web › API › DOMMatrix
[m11m21m31m41m12m22m32m42m13m23m33m43m14m24m34m44]\left [ \begin{matrix} m_{11} & m_{21} & m_{31} & m_{41} \\ m_{12} & m_{22} & m_{32} & m_{42} \\ m_{13} & m_{23} & m_{33} & m_{43} \\ m_{14} & m_{24} & m_{34} & m_{44} \end{matrix} \right ] the positions of the 16 elements (m11 through m44) which comprise the 4×4 abstract matrix.
DOMMatrixReadOnly.flipX() - Web APIs
Web › API › DOMMatrixReadOnly › flipX
const flipped = document.getelementbyid('flipped'); const matrix = new dommatrixreadonly(); const flippedmatrix = matrix.flipx(); flipped.setattribute('transform', flippedmatrix.tostring()); screenshotlive sample specifications specification status comment geometry interfaces module level 1the definition of 'dommatrixreadonly.flipx()' in that specification.
DOMStringMap - Web APIs
Web › API › DOMStringMap
the domstringmap interface is used for the htmlelement.dataset attribute, to represent data for custom attributes added to elements.
DOMTokenList.add() - Web APIs
Web › API › DOMTokenList › add
return value undefined examples in the following example we retrieve the list of classes set on a <span> element as a domtokenlist using element.classlist.
DOMTokenList.contains() - Web APIs
Web › API › DOMTokenList › contains
examples in the following example we retrieve the list of classes set on a <span> element as a domtokenlist using element.classlist.
DOMTokenList.entries() - Web APIs
Web › API › DOMTokenList › entries
examples in the following example we retrieve the list of classes set on a <span> element as a domtokenlist using element.classlist.
DOMTokenList.item() - Web APIs
Web › API › DOMTokenList › item
examples in the following example we retrieve the list of classes set on a <span> element as a domtokenlist using element.classlist.
DOMTokenList.keys() - Web APIs
Web › API › DOMTokenList › keys
examples in the following example we retrieve the list of classes set on a <span> element as a domtokenlist using element.classlist.
DOMTokenList.length - Web APIs
Web › API › DOMTokenList › length
examples in the following example we retrieve the list of classes set on a <span> element as a domtokenlist using element.classlist, then write the length of the list to the <span>'s node.textcontent.
DOMTokenList.toggle() - Web APIs
Web › API › DOMTokenList › toggle
examples in the following example we retrieve the list of classes set on a <span> element as a domtokenlist using element.classlist.
DOMTokenList.value - Web APIs
Web › API › DOMTokenList › value
syntax tokenlist.value; value a domstring examples in the following example we retrieve the list of classes set on a <span> element as a domtokenlist using element.classlist, then write the value of the list to the <span>'s node.textcontent.
DOMTokenList.values() - Web APIs
Web › API › DOMTokenList › values
examples in the following example we retrieve the list of classes set on a <span> element as a domtokenlist using element.classlist.
DataTransfer.getData() - Web APIs
Web › API › DataTransfer › getData
wdropevent) { allowdropevent.target.style.color = 'blue'; allowdropevent.preventdefault(); } function drag(dragevent) { dragevent.datatransfer.setdata("text", dragevent.target.id); dragevent.target.style.color = 'green'; } function drop(dropevent) { dropevent.preventdefault(); var data = dropevent.datatransfer.getdata("text"); dropevent.target.appendchild(document.getelementbyid(data)); document.getelementbyid("drag").style.color = 'black'; } result specifications specification status comment html living standardthe definition of 'getdata()' in that specification.
DataTransferItem.getAsFile() - Web APIs
Web › API › DataTransferItem › getAsFile
function drop_handler(ev) { console.log("drop"); ev.preventdefault(); var data = event.datatransfer.items; for (var i = 0; i < data.length; i += 1) { if ((data[i].kind == 'string') && (data[i].type.match('^text/plain'))) { // this item is the target node data[i].getasstring(function (s){ ev.target.appendchild(document.getelementbyid(s)); }); } else if ((data[i].kind == 'string') && (data[i].type.match('^text/html'))) { // drag data item is html console.log("...
DataTransferItem.getAsString() - Web APIs
Web › API › DataTransferItem › getAsString
function drop_handler(ev) { console.log("drop"); ev.preventdefault(); var data = ev.datatransfer.items; for (var i = 0; i < data.length; i += 1) { if ((data[i].kind == 'string') && (data[i].type.match('^text/plain'))) { // this item is the target node data[i].getasstring(function (s){ ev.target.appendchild(document.getelementbyid(s)); }); } else if ((data[i].kind == 'string') && (data[i].type.match('^text/html'))) { // drag data item is html console.log("...
DataTransferItem.kind - Web APIs
Web › API › DataTransferItem › kind
function drop_handler(ev) { console.log("drop"); ev.preventdefault(); var data = event.datatransfer.items; for (var i = 0; i < data.length; i += 1) { if ((data[i].kind == 'string') && (data[i].type.match('^text/plain'))) { // this item is the target node data[i].getasstring(function (s){ ev.target.appendchild(document.getelementbyid(s)); }); } else if ((data[i].kind == 'string') && (data[i].type.match('^text/html'))) { // drag data item is html console.log("...
DataTransferItem.type - Web APIs
Web › API › DataTransferItem › type
function drop_handler(ev) { console.log("drop"); ev.preventdefault(); var data = ev.datatransfer.items; for (var i = 0; i < data.length; i += 1) { if ((data[i].kind == 'string') && (data[i].type.match('^text/plain'))) { // this item is the target node data[i].getasstring(function (s){ ev.target.appendchild(document.getelementbyid(s)); }); } else if ((data[i].kind == 'string') && (data[i].type.match('^text/html'))) { // drag data item is html console.log("...
Document.URL - Web APIs
Web › API › Document › URL
syntax const url = document.url example javascript document.getelementbyid("url").textcontent = document.url; html <p id="urltext"> url:<br/> <span id="url">url goes here</span> </p> result specifications specification status comment domthe definition of 'document.url' in that specification.
Document.adoptNode() - Web APIs
Web › API › Document › adoptNode
example const iframe = document.queryselector('iframe'); const iframeimages = iframe.contentdocument.queryselectorall('img'); const newparent = document.getelementbyid('images'); iframeimages.foreach(function(imgel) { newparent.appendchild(document.adoptnode(imgel)); }); notes before they can be inserted into the current document, nodes from external documents should either be: cloned using document.importnode(); or adopted using document.adoptnode().
Document.anchors - Web APIs
Web › API › Document › anchors
example if (document.anchors.length >= 5) { dump("found too many anchors"); } the following is an example that auto populates a table of contents with every anchor on the page: <!doctype html> <html lang="en"> <head> <meta charset="utf-8" /> <title>test</title> <script> function init() { var toc = document.getelementbyid("toc"); var i, li, newanchor; for (i = 0; i < document.anchors.length; i++) { li = document.createelement("li"); newanchor = document.createelement('a'); newanchor.href = "#" + document.anchors[i].name; newanchor.innerhtml = document.anchors[i].text; li.appendchild(newanchor); toc.appendchild(li); } } </script> </head> <body onload="init()"> <h1>title</h1> <h2><...
Document.applets - Web APIs
Web › API › Document › applets
note: the <applet> element was removed in gecko 56 and chrome in late 2015.
Document.caretRangeFromPoint() - Web APIs
Web › API › Document › caretRangeFromPoint
lienty); textnode = range.offsetnode; offset = range.offset; } else if (document.caretrangefrompoint) { range = document.caretrangefrompoint(e.clientx, e.clienty); textnode = range.startcontainer; offset = range.startoffset; } // only split text_nodes if (textnode && textnode.nodetype == 3) { let replacement = textnode.splittext(offset); let br = document.createelement('br'); textnode.parentnode.insertbefore(br, replacement); } } let paragraphs = document.getelementsbytagname("p"); for (let i = 0; i < paragraphs.length; i++) { paragraphs[i].addeventlistener('click', insertbreakatpoint, false); } result ...
Document.contentType - Web APIs
Web › API › Document › contentType
note: this property is unaffected by <meta> elements.
Document.cookie - Web APIs
Web › API › Document › cookie
it can be easily bypassed using the dom, for example by creating a hidden <iframe> element with the path of the cookie, then accessing this iframe's contentdocument.cookie property.
Document.createCDATASection() - Web APIs
Web › API › Document › createCDATASection
example var docu = new domparser().parsefromstring('<xml></xml>', 'application/xml') var cdata = docu.createcdatasection('some <cdata> data & then some'); docu.getelementsbytagname('xml')[0].appendchild(cdata); alert(new xmlserializer().serializetostring(docu)); // displays: <xml><![cdata[some <cdata> data & then some]]></xml> notes this will only work with xml, not html documents (as html documents do not support cdata sections); attempting it on an html document will throw not_supported_err.
Document.createComment() - Web APIs
Web › API › Document › createComment
example var docu = new domparser().parsefromstring('<xml></xml>', 'application/xml'); var comment = docu.createcomment('this is a not-so-secret comment in your document'); docu.getelementsbytagname('xml')[0].appendchild(comment); alert(new xmlserializer().serializetostring(docu)); // displays: <xml><!--this is a not-so-secret comment in your document--></xml> specifications specification status comment domthe definition of 'document.createcomment' in that specification.
Document.createEvent() - Web APIs
Web › API › Document › createEvent
elem.addeventlistener('build', function (e) { // e.target matches elem }, false); // target can be any element or other eventtarget.
Document.createTextNode() - Web APIs
Web › API › Document › createTextNode
example <!doctype html> <html lang="en"> <head> <title>createtextnode example</title> <script> function addtextnode(text) { var newtext = document.createtextnode(text), p1 = document.getelementbyid("p1"); p1.appendchild(newtext); } </script> </head> <body> <button onclick="addtextnode('yes!
Document.documentURI - Web APIs
Web › API › Document › documentURI
syntax const uri = document.documenturi example javascript document.getelementbyid("url").textcontent = document.documenturi; html <p id="urltext"> url:<br/> <span id="url">url goes here</span> </p> result specifications specification status comment domthe definition of 'documenturi' in that specification.
Document: dragexit event - Web APIs
Web › API › Document › dragexit event
the dragexit event is fired when an element is no longer the drag operation's immediate selection target.
Document: dragleave event - Web APIs
Web › API › Document › dragleave event
the dragleave event is fired when a dragged element or text selection leaves a valid drop target.
Document: dragover event - Web APIs
Web › API › Document › dragover event
the dragover event is fired when an element or text selection is being dragged over a valid drop target (every few hundred milliseconds).
Document: dragstart event - Web APIs
Web › API › Document › dragstart event
the dragstart event is fired when the user starts dragging an element or text selection.
Document: drop event - Web APIs
Web › API › Document › drop event
the drop event is fired when an element or text selection is dropped on a valid drop target.
Document.embeds - Web APIs
Web › API › Document › embeds
the embeds read-only property of the document interface returns a list of the embedded <object> elements within the current document.
Document.exitPointerLock() - Web APIs
Web › API › Document › exitPointerLock
the exitpointerlock() method asynchronously releases a pointer lock previously requested through element.requestpointerlock.
Document.featurePolicy - Web APIs
Web › API › Document › featurePolicy
syntax var policy = iframeelement.featurepolicy value a featurepolicy object that can be used to inspect the feature policy settings applied to the document.
Document: fullscreenerror event - Web APIs
Web › API › Document › fullscreenerror event
bubbles yes cancelable no interface event event handler property onfullscreenerror as with the fullscreenchange event, two fullscreenerror events are fired; the first is sent to the element which failed to change modes, and the second is sent to the document which owns that element.
Document.images - Web APIs
Web › API › Document › images
each entry in the collection is an htmlimageelement representing a single image element.
Document.importNode() - Web APIs
Web › API › Document › importNode
example const iframe = document.queryselector("iframe"); const oldnode = iframe.contentwindow.document.getelementbyid("mynode"); const newnode = document.importnode(oldnode, true); document.getelementbyid("container").appendchild(newnode); notes before they can be inserted into the current document, nodes from external documents should either be: cloned using document.importnode(); or adopted using document.adoptnode().
Document: keypress event - Web APIs
Web › API › Document › keypress event
<p>press inside this iframe first to focus it, then try pressing keys on the keyboard.</p> <p id="log"></p> const log = document.getelementbyid('log'); document.addeventlistener('keypress', logkey); function logkey(e) { log.textcontent += ` ${e.code}`; } onkeypress equivalent document.onkeypress = logkey; specifications specification status ui events working draft ...
Document: keyup event - Web APIs
Web › API › Document › keyup event
by clicking in it), then try pressing some keys.</p> <p id="log"></p> const log = document.getelementbyid('log'); document.addeventlistener('keyup', logkey); function logkey(e) { log.textcontent += ` ${e.code}`; } onkeyup equivalent document.onkeyup = logkey; specifications specification status ui events working draft ...
Document: lostpointercapture event - Web APIs
Web › API › Document › lostpointercapture event
bubbles no cancelable no interface pointerevent event handler property onlostpointercapture examples this example listens for the lostpointercapture event, and captures the pointer for an element on pointerdown.
Document.onoffline - Web APIs
Web › API › Document › onoffline
the document.onoffline event handler is called when an offline is fired on the <body> element and bubbles up, when navigator.online property changes and becomes false.
Document.plugins - Web APIs
Web › API › Document › plugins
the plugins read-only property of the document interface returns an htmlcollection object containing one or more htmlembedelements representing the <embed> elements in the current document.
Document: pointerout event - Web APIs
Web › API › Document › pointerout event
the pointerout event is fired for several reasons including: pointing device is moved out of the hit test boundaries of an element; firing the pointerup event for a device that does not support hover (see pointerup); after firing the pointercancel event (see pointercancel); when a pen stylus leaves the hover range detectable by the digitizer.
Document: pointerover event - Web APIs
Web › API › Document › pointerover event
the pointerover event is fired when a pointing device is moved into an element's hit test boundaries.
Document: scroll event - Web APIs
Web › API › Document › scroll event
the scroll event fires when the document view or an element has been scrolled.
Document.styleSheetSets - Web APIs
Web › API › Document › styleSheetSets
example given an <ul> (list) element with the id "sheetlist", you can populate it with the names of all the available style sheet sets with code like this: let list = document.getelementbyid('sheetlist'); let sheets = document.stylesheetsets; list.innerhtml = ''; for (let i = 0; i < sheets.length; i++) { let item = document.createelement('li'); item.innerhtml = sheets[i]; list.appendchild(item); } notes the list of available style sheet sets is constructed by enumerating all the style sheets available for the document, in the order in which they're listed in th...
Document.visibilityState - Web APIs
Web › API › Document › visibilityState
the document.visibilitystate read-only property returns the visibility of the document, that is in which context this element is now visible.
Document.vlinkColor - Web APIs
Web › API › Document › vlinkColor
the recommended alternative is to get/set the color of the css :visited pseudo-class on html <a> elements (e.g., a:visited {color:red;}).
Document: wheel event - Web APIs
Web › API › Document › wheel event
examples scaling an element via the wheel this example shows how to scale an element using the mouse (or other pointing device) wheel.
Document.xmlVersion - Web APIs
Web › API › Document › xmlVersion
to detect this, you can create an element with its name in lower case, then check to see if it gets converted into all upper case (in which case the document is in the non-xml html mode): if (document.createelement("foo").tagname == "foo") { /* document is not xml */ } specifications http://www.w3.org/tr/dom-level-3-cor...ument3-version this has been removed from dom core level 4wd ...
DocumentOrShadowRoot.caretPositionFromPoint() - Web APIs
Web › API › DocumentOrShadowRoot › caretPositionFromPoint
lientx, e.clienty); textnode = range.offsetnode; offset = range.offset; } else if (document.caretrangefrompoint) { range = document.caretrangefrompoint(e.clientx, e.clienty); textnode = range.startcontainer; offset = range.startoffset; } // only split text_nodes if (textnode.nodetype == 3) { var replacement = textnode.splittext(offset); var br = document.createelement('br'); textnode.parentnode.insertbefore(br, replacement); } } window.onload = function (){ var paragraphs = document.getelementsbytagname("p"); for (i=0 ; i < paragraphs.length; i++) { paragraphs[i].addeventlistener("click", insertbreakatpoint, false); } }; specifications specification status comment css object model (cssom) view modulethe definition of ...
DocumentOrShadowRoot.nodeFromPoint() - Web APIs
Web › API › DocumentOrShadowRoot › nodeFromPoint
examples html content <div> <p>some text</p> </div> <p>top node at point 30, 20:</p> <div id="output"></div> javascript content var output = document.getelementbyid("output"); if (document.nodefrompoint) { var node = document.nodefrompoint(30, 20); output.textcontent += node.localname; } else { output.innerhtml = "<span style=\"color: red;\">" + "browser does not support <code>document.nodefrompoint()</code>" + "</span>"; } specifications not part of any specification at present.
DocumentOrShadowRoot.nodesFromPoint() - Web APIs
Web › API › DocumentOrShadowRoot › nodesFromPoint
example html content <div> <p>some text</p> </div> <p>nodes at point 30, 20:</p> <div id="output"></div> javascript content var output = document.getelementbyid("output"); if (document.nodesfrompoint) { var nodes = document.nodesfrompoint(30, 20); for(var i = 0; i < nodes.length; i++) { output.textcontent += nodes[i].localname; if (i < nodes.length - 1) { output.textcontent += " < "; } } } else { output.innerhtml = "<span style=\"color: red;\">" + "browser does not support <code>document.nodesfrompoint()</code>" + ...
DocumentType - Web APIs
Web › API › DocumentType
eg "<!element foo (bar)>".
DynamicsCompressorNode.attack - Web APIs
Web › API › DynamicsCompressorNode › attack
// create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalue...
DynamicsCompressorNode.knee - Web APIs
Web › API › DynamicsCompressorNode › knee
// create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalue...
DynamicsCompressorNode.ratio - Web APIs
Web › API › DynamicsCompressorNode › ratio
// create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalue...
DynamicsCompressorNode.release - Web APIs
Web › API › DynamicsCompressorNode › release
// create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalue...
DynamicsCompressorNode.threshold - Web APIs
Web › API › DynamicsCompressorNode › threshold
// create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalue...
DynamicsCompressorNode - Web APIs
Web › API › DynamicsCompressorNode
// create a mediaelementaudiosourcenode // feed the htmlmediaelement into it var source = audioctx.createmediaelementsource(myaudio); // create a compressor node var compressor = audioctx.createdynamicscompressor(); compressor.threshold.setvalueattime(-50, audioctx.currenttime); compressor.knee.setvalueattime(40, audioctx.currenttime); compressor.ratio.setvalueattime(12, audioctx.currenttime); compressor.attack.setvalue...
EXT_float_blend - Web APIs
Web › API › EXT float blend
with this extension enabled, calling drawarrays() or drawelements() with blending enabled and a draw buffer with 32-bit floating-point components will no longer result in an invalid_operation error.
EffectTiming.delay - Web APIs
Web › API › EffectTiming › delay
element.animate(), keyframeeffectreadonly(), and keyframeeffect() all accept an object of timing properties including delay.
EffectTiming.duration - Web APIs
Web › API › EffectTiming › duration
element.animate(), keyframeeffectreadonly(), and keyframeeffect() all accept an object of timing properties including duration.
EffectTiming.endDelay - Web APIs
Web › API › EffectTiming › endDelay
element.animate(), keyframeeffectreadonly(), and keyframeeffect() all accept an object of timing properties including enddelay.
EffectTiming.iterationStart - Web APIs
Web › API › EffectTiming › iterationStart
element.animate(), keyframeeffectreadonly.keyframeeffectreadonly(), and keyframeeffect.keyframeeffect() all accept an object of timing properties including iterationstart.
Encrypted Media Extensions API - Web APIs
Web › API › Encrypted Media Extensions API
mediakeys represents a set of keys that an associated htmlmediaelement can use for decryption of media data during playback.
Event() - Web APIs
Web › API › Event › Event
example // create a look event that bubbles up and cannot be canceled const evt = new event("look", {"bubbles":true, "cancelable":false}); document.dispatchevent(evt); // event can be dispatched from any element, not only the document mydiv.dispatchevent(evt); specifications specification status comment domthe definition of 'event()' in that specification.
Event.explicitOriginalTarget - Web APIs
Web › API › Event › explicitOriginalTarget
function mycommand(ev) { alert(ev.explicitoriginaltarget.nodename); // returns 'menuitem' } <xul:command id="my-cmd-anaction" oncommand="mycommand(event);"/> <xul:menulist> <xul:menupopup> <xul:menuitem label="get my element name!" command="my-cmd-anaction"/> </xul:menupopup> </menulist> specifications this is a mozilla-specific property.
Event.msConvertURL() - Web APIs
Web › API › Event › msConvertURL
example var bloblist = []; document.getelementbyid("pastezone").addeventlistener('paste', handlepaste, false); function handlepaste(evt) { var filelist = window.clipboarddata.files; // note that window.datatransfer.files is not applicable.
Event.stopImmediatePropagation() - Web APIs
Web › API › Event › stopImmediatePropagation
if several listeners are attached to the same element for the same event type, they are called in the order in which they were added.
Event.target - Web APIs
Web › API › Event › target
// make a list const ul = document.createelement('ul'); document.body.appendchild(ul); const li1 = document.createelement('li'); const li2 = document.createelement('li'); ul.appendchild(li1); ul.appendchild(li2); function hide(evt) { // e.target refers to the clicked <li> element // this is different than e.currenttarget, which would refer to the parent <ul> in this context evt.target.style.visibility = 'hidden'; } // attach the listen...
Event.timeStamp - Web APIs
Web › API › Event › timeStamp
</p> <p>timestamp: <span id="time">-</span></p> javascript function gettime(event) { var time = document.getelementbyid("time"); time.firstchild.nodevalue = event.timestamp; } document.body.addeventlistener("keypress", gettime); result reduced time precision to offer protection against timing attacks and fingerprinting, the precision of event.timestamp might get rounded depending on browser settings.
Event.type - Web APIs
Web › API › Event › type
html <p>press any key or click the mouse to get the event type.</p> <p id="log"></p> javascript function geteventtype(event) { const log = document.getelementbyid('log'); log.innertext = event.type + '\n' + log.innertext; } // keyboard events document.addeventlistener('keydown', geteventtype, false); // first document.addeventlistener('keypress', geteventtype, false); // second document.addeventlistener('keyup', geteventtype, false); // third // mouse events document.addeventlistener('mousedown', geteventtype, false); // first document.addevent...
EventSource() - Web APIs
Web › API › EventSource › EventSource
examples var evtsource = new eventsource('sse.php'); var eventlist = document.queryselector('ul'); evtsource.onmessage = function(e) { var newelement = document.createelement("li"); newelement.textcontent = "message: " + e.data; eventlist.appendchild(newelement); } note: you can find a full example on github — see simple sse demo using php.
EventSource: message event - Web APIs
Web › API › EventSource › message event
var evtsource = new eventsource('sse.php'); var eventlist = document.queryselector('ul'); evtsource.addeventlistener('message', (e) => { var newelement = document.createelement("li"); newelement.textcontent = "message: " + e.data; eventlist.appendchild(newelement); }); onmessage equivalent evtsource.onmessage = (e) => { var newelement = document.createelement("li"); newelement.textcontent = "message: " + e.data; eventlist.appendchild(newelement); }; specifications specification status html living standardthe ...
EventSource.onmessage - Web APIs
Web › API › EventSource › onmessage
syntax eventsource.onmessage = function examples evtsource.onmessage = function(e) { var newelement = document.createelement("li"); newelement.textcontent = "message: " + e.data; eventlist.appendchild(newelement); } note: you can find a full example on github — see simple sse demo using php.
File.getAsBinary() - Web APIs
Web › API › File › getAsBinary
example // fileinput is an htmlinputelement: <input type="file" id="myfileinput" multiple> var fileinput = document.getelementbyid("myfileinput"); // files is a filelist object (similar to nodelist) var files = fileinput.files; // object for allowed media types var accept = { binary : ["image/png", "image/jpeg"], text : ["text/plain", "text/css", "application/xml", "text/html"] }; var file; for (var i = 0; i < files.length; i++) ...
File.getAsDataURL() - Web APIs
Web › API › File › getAsDataURL
syntax var url = instanceoffile.getasdataurl(); returns a string representing a data: url example // fileinput is a htmlinputelement: <input type="file" id="myfileinput" multiple> var fileinput = document.getelementbyid("myfileinput"); // files is a filelist object (similar to nodelist) var files = fileinput.files; // array with acceptable file types var accept = ["image/png"]; // img is a htmlimgelement: <img id="myimg"> var img = document.getelementbyid("myimg"); // if we accept the first selected file type if (accept.indexof(files[0].mediatype) > -1) { // display the image // sam...
File.getAsText() - Web APIs
Web › API › File › getAsText
example // fileinput is a htmlinputelement: <input type="file" id="myfileinput" multiple> var fileinput = document.getelementbyid("myfileinput"); // files is a filelist object (similar to nodelist) var files = fileinput.files; // object for allowed media types var accept = { binary : ["image/png", "image/jpeg"], text : ["text/plain", "text/css", "application/xml", "text/html"] }; var file; for (var i = 0; i < files.length; i++) ...
File.lastModifiedDate - Web APIs
Web › API › File › lastModifiedDate
example // fileinput is a htmlinputelement: <input type="file" multiple id="myfileinput"> var fileinput = document.getelementbyid("myfileinput"); // files is a filelist object (simliar to nodelist) var files = fileinput.files; for (var i = 0; i < files.length; i++) { alert(files[i].name + " has a last modified date of " + files[i].lastmodifieddate); } reduced time precision to offer protection against timing attacks and fingerprinting, the precision of somefile.lastmodifieddate.gettime() might ...
File - Web APIs
Web › API › File
file objects are generally retrieved from a filelist object returned as a result of a user selecting files using the <input> element, from a drag and drop operation's datatransfer object, or from the mozgetasfile() api on an htmlcanvaselement.
FileReader.readAsBinaryString() - Web APIs
Web › API › FileReader › readAsBinaryString
example var canvas = document.createelement('canvas'); var height = 200; var width = 200; canvas.width = width; canvas.height = height; var ctx = canvas.getcontext('2d'); ctx.strokestyle = '#090'; ctx.beginpath(); ctx.arc(width/2, height/2, width/2 - width/10, 0, math.pi*2); ctx.stroke(); canvas.toblob(function (blob) { var reader = new filereader(); reader.onload = function () { console.log(reader.result); } reader.rea...
FileReader - Web APIs
Web › API › FileReader
file objects may be obtained from a filelist object returned as a result of a user selecting files using the <input> element, from a drag and drop operation's datatransfer object, or from the mozgetasfile() api on an htmlcanvaselement.
FileSystem - Web APIs
Web › API › FileSystem
it's not available for use in file or folder picker panels (such as when you use an <input> element with the htmlinputelement.webkitdirectory attribute.firefox full support 50ie no support noopera full support 15prefixed full support 15prefixed prefixed implemented with the vendor prefix: webkitsafari ...
FileSystemEntry.toURL() - Web APIs
Web › API › FileSystemEntry › toURL
code that makes use of this might look like this: let img = document.createelement("img"); img.src = imagefileentry.tourl(); document.body.appendchild(img); assuming the scenario mentioned before the code, the result would be html that looks like this being appended to the end of the document: <img src="filesystem:http://my-awesome-website.woot/temporary/awesomesauce.jpg"> browser compatibility the compatibility table on this page is generated from structured data.
FileSystemEntrySync - Web APIs
Web › API › FileSystemEntrySync
you cannot do the following: move a directory inside itself or to any child at any depth move an entry into its parent if a name different from its current one isn't provided move a file to a path occupied by a directory or move a directory to a path occupied by a file move any element to a path occupied by a directory that is not empty.
File and Directory Entries API support in Firefox - Web APIs
Web › API › File and Directory Entries API › Firefox support
there are only two ways to get access to file system entries at this time: the <input> element, using the htmlinputelement.webkitentries property to access an array of filesystementry objects describing file system entries you can then read.
FocusEvent.relatedTarget - Web APIs
Web › API › FocusEvent › relatedTarget
focus the eventtarget receiving focus the eventtarget losing focus (if any) focusin the eventtarget receiving focus the eventtarget losing focus (if any) focusout the eventtarget losing focus the eventtarget receiving focus (if any) note that many elements can't have focus, which is a common reason for relatedtarget to be null.
FormDataEvent - Web APIs
Web › API › FormDataEvent
the formdataevent interface represents a formdata event — such an event is fired on an htmlformelement object after the entry list representing the form's data is constructed.
GeometryUtils - Web APIs
Web › API › GeometryUtils
geometryutils is a raw interface and no object of this type can be created; it is implemented by text, element, csspseudoelement, and document objects.
GlobalEventHandlers.onloadstart - Web APIs
Web › API › GlobalEventHandlers › GlobalEventHandlers.onloadstart
syntax element.onloadstart = handlerfunction; var handlerfunction = element.onloadstart; handlerfunction should be either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.onauxclick - Web APIs
Web › API › GlobalEventHandlers › onauxclick
within the function, this will be the element upon which the event was triggered.
GlobalEventHandlers.oncancel - Web APIs
Web › API › GlobalEventHandlers › oncancel
the oncancel property of the globaleventhandlers mixin is an eventhandler for processing cancel events sent to a <dialog> element.
GlobalEventHandlers.oncanplay - Web APIs
Web › API › GlobalEventHandlers › oncanplay
syntax element.oncanplay = handlerfunction; var handlerfunction = element.oncanplay; handlerfunction is either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.oncanplaythrough - Web APIs
Web › API › GlobalEventHandlers › oncanplaythrough
syntax element.oncanplaythrough = handlerfunction; var handlerfunction = element.oncanplaythrough; handlerfunction is either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.onclose - Web APIs
Web › API › GlobalEventHandlers › onclose
the onclose property of the globaleventhandlers mixin is an eventhandler for processing close events sent to a <dialog> element.
GlobalEventHandlers.ondurationchange - Web APIs
Web › API › GlobalEventHandlers › ondurationchange
syntax element.ondurationchange = handlerfunction; var handlerfunction = element.ondurationchange; handlerfunction is either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.onemptied - Web APIs
Web › API › GlobalEventHandlers › onemptied
syntax element.onemptied = handlerfunction; var handlerfunction = element.onemptied; handlerfunction should be either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.onended - Web APIs
Web › API › GlobalEventHandlers › onended
syntax element.onended = handlerfunction; var handlerfunction = element.onended; handlerfunction is either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.onformdata - Web APIs
Web › API › GlobalEventHandlers › onformdata
onformdata is available on htmlformelement.
GlobalEventHandlers.ongotpointercapture - Web APIs
Web › API › GlobalEventHandlers › ongotpointercapture
example function overhandler(event) { // determine the target event's gotpointercapture handler let gotcapturehandler = event.target.ongotpointercapture; } function init() { let el = document.getelementbyid('target'); el.ongotpointercapture = overhandler; } specifications specification status comment pointer events – level 2the definition of 'ongotpointercapture' in that specification.
GlobalEventHandlers.onload - Web APIs
Web › API › GlobalEventHandlers › onload
the onload property of the globaleventhandlers mixin is an eventhandler that processes load events on a window, xmlhttprequest, <img> element, etc.
GlobalEventHandlers.onloadeddata - Web APIs
Web › API › GlobalEventHandlers › onloadeddata
syntax element.onloadeddata = handlerfunction; var handlerfunction = element.onloadeddata; handlerfunction is either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.onloadedmetadata - Web APIs
Web › API › GlobalEventHandlers › onloadedmetadata
syntax element.onloadedmetadata = handlerfunction; var handlerfunction = element.onloadedmetadata; handlerfunction should be either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.onlostpointercapture - Web APIs
Web › API › GlobalEventHandlers › onlostpointercapture
example function overhandler(event) { // determine the target event's lostpointercapture handler let lostcapturehandler = event.target.onlostpointercapture; } function init() { let el = document.getelementbyid('target'); el.onlostpointercapture = overhandler; } specifications specification status comment pointer events – level 2the definition of 'onlostpointercapture' in that specification.
GlobalEventHandlers.onmousewheel - Web APIs
Web › API › GlobalEventHandlers › onmousewheel
syntax element.onmousewheel = handlerfunction; var handlerfunction = element.onmousewheel; handlerfunction should be either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.onpause - Web APIs
Web › API › GlobalEventHandlers › onpause
syntax element.onpause = handlerfunction; var handlerfunction = element.onpause; handlerfunction should be either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.onplaying - Web APIs
Web › API › GlobalEventHandlers › onplaying
syntax element.onplaying = handlerfunction; var handlerfunction = element.onplaying; handlerfunction is either null or a javascript function specifying the handler for the event.
GlobalEventHandlers.onreset - Web APIs
Web › API › GlobalEventHandlers › onreset
time stamp: ${event.timestamp}`; } const form = document.getelementbyid('form'); const log = document.getelementbyid('log'); form.onreset = logreset; result specification specification status comment html living standardthe definition of 'onreset' in that specification.
GlobalEventHandlers.onsubmit - Web APIs
Web › API › GlobalEventHandlers › onsubmit
thanks!</p> javascript const form = document.getelementbyid('form'); const error = document.getelementbyid('error'); const city = document.getelementbyid('city'); const thanks = document.getelementbyid('thanks'); city.oninvalid = invalid; form.onsubmit = submit; function invalid(event) { error.removeattribute('hidden'); } function submit(event) { form.setattribute('hidden', ''); thanks.removeattribute('hidden'); // for this example, don't ...
GlobalEventHandlers.ontransitionend - Web APIs
Web › API › GlobalEventHandlers › ontransitionend
syntax var transitionendhandler = target.ontransitionend; target.ontransitionend = function value a function to be called when a transitionend event occurs indicating that a css transition has completed on the target, where the target object is an html element (htmlelement), document (document), or window (window).
GlobalEventHandlers.onwheel - Web APIs
Web › API › GlobalEventHandlers › onwheel
examples this example shows how to scale an element using the mouse (or other pointing device) wheel.
msAudioCategory - Web APIs
Web › API › HTMLAudioElement › msAudioCategory
the msaudiocategory property of the html <audio> element, is a read/write proprietary attribute, specific to internet explorer and microsoft edge.
inert - Web APIs
Web › API › HTMLElement › inert
the boolean inert attribute, when present, may make the browser "ignore" the element from assistive technologies, page search and text selection.
HTMLOptionsCollection - Web APIs
Web › API › HTMLOptionsCollection
the htmloptionscollection interface represents a collection of <option> html elements (in document order) and offers methods and properties for selecting from the list as well as optionally altering its items.
onMSVideoFormatChanged - Web APIs
Web › API › HTMLVideoElement › onMSVideoFormatChanged
syntax value description event property object.onmsvideoformatchanged = handler; attachevent method object.attachevent("onmsvideoformatchanged", handler) addeventlistener method object.addeventlistener("", handler, usecapture) event handler parameters val[in], type=function see also htmlvideoelement microsoft api extensions ...
onMSVideoFrameStepCompleted - Web APIs
Web › API › HTMLVideoElement › onMSVideoFrameStepCompleted
syntax value description event property object.onmsvideoframestepcompleted = handler; attachevent method object.attachevent("onmsvideoframestepcompleted", handler) addeventlistener method object.addeventlistener("", handler, usecapture) event handler parameters val[in], type=function see also htmlvideoelement microsoft api extensions ...
onMSVideoOptimalLayoutChanged - Web APIs
Web › API › HTMLVideoElement › onMSVideoOptimalLayoutChanged
on event property object.onmsvideooptimallayoutchanged = handler; attachevent method object.attachevent("onmsvideooptimallayoutchanged", handler) addeventlistener method object.addeventlistener("", handler, usecapture) synchronous no bubbles no cancelable no see also msislayoutoptimalforplayback htmlvideoelement microsoft api extensions ...
In depth: Microtasks and the JavaScript runtime environment - Web APIs
Web › API › HTML DOM API › Microtask guide › In depth
consider the javascript program below: let outputelem = document.getelementbyid("output"); let userlanguages = { "mike": "en", "teresa": "es" }; function greetuser(user) { function localgreeting(user) { let greeting; let language = userlanguages[user]; switch(language) { case "es": greeting = `¡hola, ${user}!`; break; case "en": default: greeting = `hello, ${user}!`; break; } return greeting;...
Headers - Web APIs
Web › API › Headers
headers.foreach() executes a provided function once for each array element.
History.back() - Web APIs
Web › API › History › back
html <button id="go-back">go back!</button> javascript document.getelementbyid('go-back').addeventlistener('click', () => { history.back(); }); specifications specification status comment html living standardthe definition of 'history.back()' in that specification.
History.forward() - Web APIs
Web › API › History › forward
html <button id='go-forward'>go forward!</button> javascript document.getelementbyid('go-forward').addeventlistener('click', e => { window.history.forward(); }) specifications specification status comment html living standardthe definition of 'history' in that specification.
History.length - Web APIs
Web › API › History › length
the history.length read-only property returns an integer representing the number of elements in the session history, including the currently loaded page.
History - Web APIs
Web › API › History
length read only returns an integer representing the number of elements in the session history, including the currently loaded page.
IDBCursor.advance() - Web APIs
Web › API › IDBCursor › advance
mplete working example, see our idbcursor example (view example live.) function advanceresult() { list.innerhtml = ''; var transaction = db.transaction(['rushalbumlist'], "readonly"); var objectstore = transaction.objectstore('rushalbumlist'); objectstore.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.albumtitle + '</strong>, ' + cursor.value.year; list.appendchild(listitem); cursor.advance(2); } else { console.log('every other entry displayed.'); } }; }; specifications specification status comment indexed database api 2.0the definition of 'advance()' in that specification.
IDBCursor.continue() - Web APIs
Web › API › IDBCursor › continue
for a complete working example, see our idbcursor example (view example live.) function displaydata() { var transaction = db.transaction(['rushalbumlist'], "readonly"); var objectstore = transaction.objectstore('rushalbumlist'); objectstore.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = cursor.value.albumtitle + ', ' + cursor.value.year; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specifications specification status comment indexed database api 2.0the definition of 'continue()' in that specification.
IDBCursor.delete() - Web APIs
Web › API › IDBCursor › delete
even power windows is better.'); }; } else { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.albumtitle + '</strong>, ' + cursor.value.year; list.appendchild(listitem); } cursor.continue(); } else { console.log('entries displayed.'); } }; }; specifications specification status comment indexed database api 2.0the definition of 'delete()' in that specification.
IDBCursor.direction - Web APIs
Web › API › IDBCursor › direction
ing example, see our idbcursor example (view example live.) function backwards() { list.innerhtml = ''; var transaction = db.transaction(['rushalbumlist'], 'readonly'); var objectstore = transaction.objectstore('rushalbumlist'); objectstore.opencursor(null,'prev').onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.albumtitle + '</strong>, ' + cursor.value.year; list.appendchild(listitem); console.log(cursor.direction); cursor.continue(); } else { console.log('entries displayed backwards.'); } }; }; specifications specification status comment indexed database api 2.0the defi...
IDBCursor.key - Web APIs
Web › API › IDBCursor › key
for a complete working example, see our idbcursor example (view example live.) function displaydata() { var transaction = db.transaction(['rushalbumlist'], "readonly"); var objectstore = transaction.objectstore('rushalbumlist'); objectstore.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = cursor.value.albumtitle + ', ' + cursor.value.year; list.appendchild(listitem); console.log(cursor.key); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specifications specification status comment indexed database api 2.0the definition of 'key' in that specification.
IDBCursor.primaryKey - Web APIs
Web › API › IDBCursor › primaryKey
for a complete working example, see our idbcursor example (view example live.) function displaydata() { var transaction = db.transaction(['rushalbumlist'], "readonly"); var objectstore = transaction.objectstore('rushalbumlist'); objectstore.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = cursor.value.albumtitle + ', ' + cursor.value.year; list.appendchild(listitem); console.log(cursor.primarykey); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specifications specification status comment indexed database api 2.0the definition of 'primarykey' in that specificat...
IDBCursor.request - Web APIs
Web › API › IDBCursor › request
for example: function displaydata() { list.innerhtml = ''; var transaction = db.transaction(['rushalbumlist'], 'readonly'); var objectstore = transaction.objectstore('rushalbumlist'); var request = objectstore.opencursor(); request.onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.albumtitle + '</strong>, ' + cursor.value.year; list.appendchild(listitem); console.log(cursor.request); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specification specification status comment indexed database api draftthe definition o...
IDBCursor.source - Web APIs
Web › API › IDBCursor › source
for a complete working example, see our idbcursor example (view example live.) function displaydata() { var transaction = db.transaction(['rushalbumlist'], "readonly"); var objectstore = transaction.objectstore('rushalbumlist'); objectstore.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = cursor.value.albumtitle + ', ' + cursor.value.year; list.appendchild(listitem); console.log(cursor.source); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specifications specification status comment indexed database api 2.0the definition of 'source' in that specification.
IDBCursor.update() - Web APIs
Web › API › IDBCursor › update
ent) { const cursor = event.target.result; if (cursor) { if (cursor.value.albumtitle === 'a farewell to kings') { const updatedata = cursor.value; updatedata.year = 2050; const request = cursor.update(updatedata); request.onsuccess = function() { console.log('a better album year?'); }; }; const listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.albumtitle + '</strong>, ' + cursor.value.year; list.appendchild(listitem); cursor.continue(); } else { console.log('entries displayed.'); } }; }; specifications specification status comment indexed database api 2.0the definition of 'update()' in that specification.
IDBCursor - Web APIs
Web › API › IDBCursor
for a complete working example, see our idbcursor example (view example live.) function displaydata() { var transaction = db.transaction(['rushalbumlist'], "readonly"); var objectstore = transaction.objectstore('rushalbumlist'); objectstore.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = cursor.value.albumtitle + ', ' + cursor.value.year; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displayed.'); } }; } specifications specification status comment indexed database api 2.0the definition of 'cursor' in that specification.
IDBCursorWithValue.value - Web APIs
Web › API › IDBCursorWithValue › value
for a complete working example, see our idbcursor example (view example live.) function displaydata() { var transaction = db.transaction(['rushalbumlist'], "readonly"); var objectstore = transaction.objectstore('rushalbumlist'); objectstore.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = cursor.value.albumtitle + ', ' + cursor.value.year; list.appendchild(listitem); console.log(cursor.value); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specifications specification status comment indexed database api 2.0the definition of 'source' in that specification.
IDBCursorWithValue - Web APIs
Web › API › IDBCursorWithValue
for a complete working example, see our idbcursor example (view example live.) function displaydata() { var transaction = db.transaction(['rushalbumlist'], "readonly"); var objectstore = transaction.objectstore('rushalbumlist'); objectstore.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = cursor.value.albumtitle + ', ' + cursor.value.year; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specifications specification status comment indexed database api 2.0the definition of 'idbcursorwithvalue' in that specification.
databases - Web APIs
Web › API › IDBFactory › databases
return value a promise that resolves either to an error or a list of dictionaries, each with two elements, name and version.
IDBIndex.count() - Web APIs
Web › API › IDBIndex › count
contactslist'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); var countrequest = myindex.count(); countrequest.onsuccess = function() { console.log(countrequest.result); } myindex.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.value.id + '</td>' + '<td>' + cursor.value.lname + '</td>' + '<td>' + cursor.value.fname + '</td>' + '<td>' + cursor.value.jtitle + '</td>' + '<td>' + cursor.value.company + '</td>' + '<td>' + cursor.value.email ...
IDBIndex.get() - Web APIs
Web › API › IDBIndex › get
contactslist'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); var getrequest = myindex.get('bungle'); getrequest.onsuccess = function() { console.log(getrequest.result); } myindex.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.value.id + '</td>' + '<td>' + cursor.value.lname + '</td>' + '<td>' + cursor.value.fname + '</td>' + '<td>' + cursor.value.jtitle + '</td>' + '<td>' + cursor.value.company + '</td>' + '<td>' + cursor.value.email ...
IDBIndex.getKey() - Web APIs
Web › API › IDBIndex › getKey
'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); var getkeyrequest = myindex.getkey('bungle'); getkeyrequest.onsuccess = function() { console.log(getkeyrequest.result); } myindex.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.value.id + '</td>' + '<td>' + cursor.value.lname + '</td>' + '<td>' + cursor.value.fname + '</td>' + '<td>' + cursor.value.jtitle + '</td>' + '<td>' + cursor.value.company + '</td>' + '<td>' + cursor.value.email ...
IDBIndex.isAutoLocale - Web APIs
Web › API › IDBIndex › isAutoLocale
ydatabyindex() { tableentry.innerhtml = ''; var transaction = db.transaction(['contactslist'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); console.log(myindex.isautolocale); myindex.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.value.id + '</td>' + '<td>' + cursor.value.lname + '</td>' + '<td>' + cursor.value.fname + '</td>' + '<td>' + cursor.value.jtitle + '</td>' + '<td>' + cursor.value.company + '</td>' + '<td>' + cursor.value.email ...
IDBIndex.keyPath - Web APIs
Web › API › IDBIndex › keyPath
isplaydatabyindex() { tableentry.innerhtml = ''; var transaction = db.transaction(['contactslist'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); console.log(myindex.keypath); myindex.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.value.id + '</td>' + '<td>' + cursor.value.lname + '</td>' + '<td>' + cursor.value.fname + '</td>' + '<td>' + cursor.value.jtitle + '</td>' + '<td>' + cursor.value.company + '</td>' + '<td>' + cursor.value.email ...
IDBIndex.locale - Web APIs
Web › API › IDBIndex › locale
displaydatabyindex() { tableentry.innerhtml = ''; var transaction = db.transaction(['contactslist'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); console.log(myindex.locale); myindex.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.value.id + '</td>' + '<td>' + cursor.value.lname + '</td>' + '<td>' + cursor.value.fname + '</td>' + '<td>' + cursor.value.jtitle + '</td>' + '<td>' + cursor.value.company + '</td>' + '<td>' + cursor.value.email ...
IDBIndex.multiEntry - Web APIs
Web › API › IDBIndex › multiEntry
laydatabyindex() { tableentry.innerhtml = ''; var transaction = db.transaction(['contactslist'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); console.log(myindex.multientry); myindex.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.value.id + '</td>' + '<td>' + cursor.value.lname + '</td>' + '<td>' + cursor.value.fname + '</td>' + '<td>' + cursor.value.jtitle + '</td>' + '<td>' + cursor.value.company + '</td>' + '<td>' + cursor.value.email ...
IDBIndex.name - Web APIs
Web › API › IDBIndex › name
n displaydatabyindex() { tableentry.innerhtml = ''; var transaction = db.transaction(['contactslist'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); console.log(myindex.name); myindex.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.value.id + '</td>' + '<td>' + cursor.value.lname + '</td>' + '<td>' + cursor.value.fname + '</td>' + '<td>' + cursor.value.jtitle + '</td>' + '<td>' + cursor.value.company + '</td>' + '<td>' + cursor.value.email ...
IDBIndex.objectStore - Web APIs
Web › API › IDBIndex › objectStore
aydatabyindex() { tableentry.innerhtml = ''; var transaction = db.transaction(['contactslist'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); console.log(myindex.objectstore); myindex.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.value.id + '</td>' + '<td>' + cursor.value.lname + '</td>' + '<td>' + cursor.value.fname + '</td>' + '<td>' + cursor.value.jtitle + '</td>' + '<td>' + cursor.value.company + '</td>' + '<td>' + cursor.value.email ...
IDBIndex.openCursor() - Web APIs
Web › API › IDBIndex › openCursor
w the example live.) function displaydatabyindex() { tableentry.innerhtml = ''; var transaction = db.transaction(['contactslist'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); myindex.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.value.id + '</td>' + '<td>' + cursor.value.lname + '</td>' + '<td>' + cursor.value.fname + '</td>' + '<td>' + cursor.value.jtitle + '</td>' + '<td>' + cursor.value.company + '</td>' + '<td>' + cursor.value.email ...
IDBIndex.openKeyCursor() - Web APIs
Web › API › IDBIndex › openKeyCursor
function displaydatabyindex() { tableentry.innerhtml = ''; var transaction = db.transaction(['contactslist'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); myindex.openkeycursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.key + '</td>' + '<td>' + cursor.primarykey + '</td>'; tableentry.appendchild(tablerow); cursor.continue(); } else { console.log('all last names displayed.'); } }; }; specification specification status comment indexed database api 2.0the definition of 'openkeyc...
IDBIndex.unique - Web APIs
Web › API › IDBIndex › unique
displaydatabyindex() { tableentry.innerhtml = ''; var transaction = db.transaction(['contactslist'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); console.log(myindex.unique); myindex.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.value.id + '</td>' + '<td>' + cursor.value.lname + '</td>' + '<td>' + cursor.value.fname + '</td>' + '<td>' + cursor.value.jtitle + '</td>' + '<td>' + cursor.value.company + '</td>' + '<td>' + cursor.value.email ...
IDBIndex - Web APIs
Web › API › IDBIndex
ew the example live.) function displaydatabyindex() { tableentry.innerhtml = ''; var transaction = db.transaction(['contactslist'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); myindex.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.value.id + '</td>' + '<td>' + cursor.value.lname + '</td>' + '<td>' + cursor.value.fname + '</td>' + '<td>' + cursor.value.jtitle + '</td>' + '<td>' + cursor.value.company + '</td>' + '<td>' + cursor.value.email ...
IDBKeyRange.bound() - Web APIs
Web › API › IDBKeyRange › bound
les repo (view the example live too.) function displaydata() { var keyrangevalue = idbkeyrange.bound("a", "f"); var transaction = db.transaction(['fthings'], 'readonly'); var objectstore = transaction.objectstore('fthings'); objectstore.opencursor(keyrangevalue).onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.fthing + '</strong>, ' + cursor.value.frating; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specification specification status comment indexed database api 2.0the definition of 'bound()' in that specification.
IDBKeyRange.lower - Web APIs
Web › API › IDBKeyRange › lower
displaydata() { var keyrangevalue = idbkeyrange.bound("f", "w", true, true); console.log(keyrangevalue.lower); var transaction = db.transaction(['fthings'], 'readonly'); var objectstore = transaction.objectstore('fthings'); objectstore.opencursor(keyrangevalue).onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.fthing + '</strong>, ' + cursor.value.frating; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specification specification status comment indexed database api 2.0the definition of 'lower' in that specification.
IDBKeyRange.lowerBound() - Web APIs
Web › API › IDBKeyRange › lowerBound
ple repo (view the example live too.) function displaydata() { var keyrangevalue = idbkeyrange.lowerbound("f"); var transaction = db.transaction(['fthings'], 'readonly'); var objectstore = transaction.objectstore('fthings'); objectstore.opencursor(keyrangevalue).onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.fthing + '</strong>, ' + cursor.value.frating; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specification specification status comment indexed database api 2.0the definition of 'lowerbound()' in that specifi...
IDBKeyRange.lowerOpen - Web APIs
Web › API › IDBKeyRange › lowerOpen
playdata() { var keyrangevalue = idbkeyrange.bound("f", "w", true, true); console.log(keyrangevalue.loweropen); var transaction = db.transaction(['fthings'], 'readonly'); var objectstore = transaction.objectstore('fthings'); objectstore.opencursor(keyrangevalue).onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.fthing + '</strong>, ' + cursor.value.frating; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specification specification status comment indexed database api 2.0the definition of 'loweropen' in that specification...
IDBKeyRange.only() - Web APIs
Web › API › IDBKeyRange › only
bkeyrange repo (view the example live too.) function displaydata() { var keyrangevalue = idbkeyrange.only("a"); var transaction = db.transaction(['fthings'], 'readonly'); var objectstore = transaction.objectstore('fthings'); objectstore.opencursor(keyrangevalue).onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.fthing + '</strong>, ' + cursor.value.frating; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specification specification status comment indexed database api 2.0the definition of 'only' in that specification.
IDBKeyRange.upper - Web APIs
Web › API › IDBKeyRange › upper
displaydata() { var keyrangevalue = idbkeyrange.bound("f", "w", true, true); console.log(keyrangevalue.upper); var transaction = db.transaction(['fthings'], 'readonly'); var objectstore = transaction.objectstore('fthings'); objectstore.opencursor(keyrangevalue).onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.fthing + '</strong>, ' + cursor.value.frating; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specification specification status comment indexed database api 2.0the definition of 'upper' in that specification.
IDBKeyRange.upperBound() - Web APIs
Web › API › IDBKeyRange › upperBound
ple repo (view the example live too.) function displaydata() { var keyrangevalue = idbkeyrange.upperbound("f"); var transaction = db.transaction(['fthings'], 'readonly'); var objectstore = transaction.objectstore('fthings'); objectstore.opencursor(keyrangevalue).onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.fthing + '</strong>, ' + cursor.value.frating; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specification specification status comment indexed database api 2.0the definition of 'upperbound()' in that spec...
IDBKeyRange.upperOpen - Web APIs
Web › API › IDBKeyRange › upperOpen
playdata() { var keyrangevalue = idbkeyrange.bound("f", "w", true, true); console.log(keyrangevalue.upperopen); var transaction = db.transaction(['fthings'], 'readonly'); var objectstore = transaction.objectstore('fthings'); objectstore.opencursor(keyrangevalue).onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.fthing + '</strong>, ' + cursor.value.frating; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displayed.'); } }; }; specification specification status comment indexed database api 2.0the definition of 'upperopen' in that specificat...
IDBKeyRange - Web APIs
Web › API › IDBKeyRange
example repo (view the example live too.) function displaydata() { var keyrangevalue = idbkeyrange.bound("a", "f"); var transaction = db.transaction(['fthings'], 'readonly'); var objectstore = transaction.objectstore('fthings'); objectstore.opencursor(keyrangevalue).onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var listitem = document.createelement('li'); listitem.innerhtml = '<strong>' + cursor.value.fthing + '</strong>, ' + cursor.value.frating; list.appendchild(listitem); cursor.continue(); } else { console.log('entries all displayed.'); } }; } specifications specification status comment indexed database api 2.0the definition of 'idbkeyrange' in that specification.
IDBLocaleAwareKeyRange - Web APIs
Web › API › IDBLocaleAwareKeyRange
n displaydata() { var keyrangevalue = idblocaleawarekeyrange.bound("a", "f"); var transaction = db.transaction(['fthings'], 'readonly'); var objectstore = transaction.objectstore('fthings'); var myindex = objectstore.index('lname'); myindex.opencursor(keyrangevalue).onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '&lt;td&gt;' + cursor.value.id + '&lt;/td&gt;' + '&lt;td&gt;' + cursor.value.lname + '&lt;/td&gt;' + '&lt;td&gt;' + cursor.value.fname + '&lt;/td&gt;' + '&lt;td&gt;' + cursor.value.jtitle + '&lt;/td&gt;' + '&lt;td&gt;' + cursor.value.company + '&lt;/td&gt...
IDBObjectStore.createIndex() - Web APIs
Web › API › IDBObjectStore › createIndex
multientry if true, the index will add an entry in the index for each array element when the keypath resolves to an array.
IDBObjectStore.index() - Web APIs
Web › API › IDBObjectStore › index
ew the example live.) function displaydatabyindex() { tableentry.innerhtml = ''; var transaction = db.transaction(['contactslist'], 'readonly'); var objectstore = transaction.objectstore('contactslist'); var myindex = objectstore.index('lname'); myindex.opencursor().onsuccess = function(event) { var cursor = event.target.result; if(cursor) { var tablerow = document.createelement('tr'); tablerow.innerhtml = '<td>' + cursor.value.id + '</td>' + '<td>' + cursor.value.lname + '</td>' + '<td>' + cursor.value.fname + '</td>' + '<td>' + cursor.value.jtitle + '</td>' + '<td>' + cursor.value.company + '</td>' + '<td>' + cursor.value.email ...
ImageBitmapRenderingContext.transferFromImageBitmap() - Web APIs
Web › API › ImageBitmapRenderingContext › transferFromImageBitmap
examples html <canvas id="htmlcanvas"></canvas> javascript var htmlcanvas = document.getelementbyid("htmlcanvas").getcontext("bitmaprenderer"); // draw a webgl scene offscreen var offscreen = new offscreencanvas(256, 256); var gl = offscreen.getcontext("webgl"); // ...
ImageBitmapRenderingContext - Web APIs
Web › API › ImageBitmapRenderingContext
its context id (the first argument to htmlcanvaselement.getcontext() or offscreencanvas.getcontext()) is "bitmaprenderer".
ImageCapture.grabFrame() - Web APIs
Web › API › ImageCapture › grabFrame
it shows how to use the promise returned by grabframe() to copy the returned frame to a <canvas> element.
ImageCapture.takePhoto() - Web APIs
Web › API › ImageCapture › takePhoto
it shows how to use the promise returned by takephoto() to copy the returned blob to an <img> element.
ImageData() - Web APIs
Web › API › ImageData › ImageData
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const arr = new uint8clampedarray(40000); // iterate through every pixel for (let i = 0; i < arr.length; i += 4) { arr[i + 0] = 0; // r value arr[i + 1] = 190; // g value arr[i + 2] = 0; // b value arr[i + 3] = 255; // a value } // initialize a new imagedata object let imagedata = new imagedata(arr, 200); // draw image data to...
ImageData.data - Web APIs
Web › API › ImageData › data
const canvas = document.getelementbyid('canvas'); const ctx = canvas.getcontext('2d'); const imagedata = ctx.createimagedata(100, 100); // iterate through every pixel for (let i = 0; i < imagedata.data.length; i += 4) { // percentage in the x direction, times 255 let x = (i % 400) / 400 * 255; // percentage in the y direction, times 255 let y = math.ceil(i / 400) / 100 * 255; // modify pixel data imagedata.data[i + 0...
ImageData - Web APIs
Web › API › ImageData
the imagedata interface represents the underlying pixel data of an area of a <canvas> element.
Checking when a deadline is due - Web APIs
Web › API › IndexedDB API › Checking when a deadline is due
<select> elements for inputting the day, month and year of the deadline.
InputEvent.data - Web APIs
Web › API › InputEvent › data
examples in the following simple example we've set up an event listener on the input event so that when any change is made to the contents of the <input> element (either by typing or pasting), the text that was added is retrieved via the inputevent.data property and reported in the paragraph below the input.
InputEvent.dataTransfer - Web APIs
Web › API › InputEvent › dataTransfer
examples in the following simple example we've set up an event listener on the input event so that when any content is pasted into the contenteditable <p> element, its html source is retrieved via the inputevent.datatransfer.getdata() method and reported in the paragraph below the input.
InputEvent.inputType - Web APIs
Web › API › InputEvent › inputType
try inserting line breaks, or deleting text in different ways, or pasting different content in.</p> <hr> <ul> <li>a sample</li> <li>bulleted</li> <li>list.</li> </ul> <p>another paragraph.</p> </div> javascript const log = document.getelementbyid('log'); const editable = document.queryselector('div[contenteditable]'); editable.addeventlistener('input', loginputtype); function loginputtype(event) { log.textcontent = `input type: ${event.inputtype}`; } result try editing the text inside the <div> and see what happens.
IntersectionObserver.disconnect() - Web APIs
Web › API › IntersectionObserver › disconnect
the intersectionobserver method disconnect() stops watching all of its target elements for visibility changes.
IntersectionObserverEntry.rootBounds - Web APIs
Web › API › IntersectionObserverEntry › rootBounds
otherwise, it's the bounds of the root element.
KeyboardEvent.initKeyEvent() - Web APIs
Web › API › KeyboardEvent › initKeyEvent
false, // ctrlkeyarg, false, // altkeyarg, false, // shiftkeyarg, false, // metakeyarg, 9, // keycodearg, 0); // charcodearg); document.getelementbyid('blah').dispatchevent(event); specification this implementation of keyboard events is based on the key events spec in the early versions of dom 2 events, later removed from that spec.
KeyboardEvent - Web APIs
Web › API › KeyboardEvent
they can be delivered to any object which implements globaleventhandlers, including element, document, and window.
KeyboardLayoutMap.get() - Web APIs
Web › API › KeyboardLayoutMap › get
the get() method of the keyboardlayoutmap interface returns the element with the given key.
KeyboardLayoutMap.size - Web APIs
Web › API › KeyboardLayoutMap › size
the size read-only property of the keyboardlayoutmap interface returns the number of elements in the map.
KeyframeEffect.composite - Web APIs
Web › API › KeyframeEffect › composite
the composite property of a keyframeeffect resolves how an element's animation impacts its underlying property values.
Location: hash - Web APIs
Web › API › Location › hash
syntax string = object.hash; object.hash = string; examples <a id="myanchor" href="/docs/location.href#examples">examples</a> <script> var anchor = document.getelementbyid("myanchor"); console.log(anchor.hash); // returns '#examples' </script> specifications specification status comment html living standardthe definition of 'hash' in that specification.
Location: host - Web APIs
Web › API › Location › host
syntax string = object.host; object.host = string; examples var anchor = document.createelement("a"); anchor.href = "https://developer.mozilla.org/location.host" anchor.host == "developer.mozilla.org" anchor.href = "https://developer.mozilla.org:443/location.host" anchor.host == "developer.mozilla.org" // the port number is not included because 443 is the scheme's default port anchor.href = "https://developer.mozilla.org:4097/location.host" anchor.host == "developer.mozilla.org:4097" specifications specification status comment html living standardthe definition of 'host' in that speci...
Location: hostname - Web APIs
Web › API › Location › hostname
syntax string = object.hostname; object.hostname = string; examples // let's an <a id="myanchor" href="https://developer.mozilla.org/docs/location.hostname"> element be in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.hostname; // returns:'developer.mozilla.org' specifications specification status comment html living standardthe definition of 'hostname' in that specification.
Location: href - Web APIs
Web › API › Location › href
syntax string = object.href; object.href = string; examples // lets imagine an <a id="myanchor" href="https://developer.mozilla.org/location/href"> element is in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.href; // returns: 'https://developer.mozilla.org/location/href' specifications specification status comment html living standardthe definition of 'href' in that specification.
Location: password - Web APIs
Web › API › Location › password
syntax string = object.password; object.password = string; examples // let's <a id="myanchor" href="https://anonymous:flabada@developer.mozilla.org/docs/location.username"> be in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.password; // returns:'flabada' ...
Location: pathname - Web APIs
Web › API › Location › pathname
syntax string = object.pathname; object.pathname = string; examples // let's an <a id="myanchor" href="https://developer.mozilla.org/docs/location.pathname"> element be in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.pathname; // returns:'/docs/location.pathname' specifications specification status comment html living standardthe definition of 'pathname' in that specification.
Location: port - Web APIs
Web › API › Location › port
syntax string = object.port; object.port = string; examples // let's an <a id="myanchor" href="https://developer.mozilla.org:443/docs/location.port"> element be in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.port; // returns:'443' specifications specification status comment html living standardthe definition of 'location.port' in that specification.
Location: protocol - Web APIs
Web › API › Location › protocol
syntax string = object.protocol; object.protocol = string; examples // let's an <a id="myanchor" href="https://developer.mozilla.org/location.protocol"> element be in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.protocol; // returns:'https:' specifications specification status comment html living standardthe definition of 'protocol' in that specification.
Location: search - Web APIs
Web › API › Location › search
syntax string = object.search; object.search = string; examples // let an <a id="myanchor" href="https://developer.mozilla.org/docs/location.search?q=123"> element be in the document var anchor = document.getelementbyid("myanchor"); var querystring = anchor.search; // returns:'?q=123' // further parsing: let params = new urlsearchparams(querystring); let q = parseint(params.get("q")); // is the number 123 specifications specification status comment html living standardthe definition of 'search' in that specification.
Location: toString() - Web APIs
Web › API › Location › toString
syntax string = object.tostring(); examples // let's imagine an <a id="myanchor" href="https://developer.mozilla.org/docs/location/tostring"> element is in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.tostring(); // returns: 'https://developer.mozilla.org/docs/location/tostring' specifications specification status comment html living standard living standard ...
Location: username - Web APIs
Web › API › Location › username
syntax string = object.username; object.username = string; examples // let's <a id="myanchor" href="https://anonymous:flabada@developer.mozilla.org/docs/location.username"> be in the document var anchor = document.getelementbyid("myanchor"); var result = anchor.username; // returns:'anonymous' ...
MSCandidateWindowHide - Web APIs
Web › API › MSCandidateWindowHide
web applications need only register for this event once per element (the handler will remain valid for the lifetime of the element).
MSCandidateWindowUpdate - Web APIs
Web › API › MSCandidateWindowUpdate
tan ime candidate window may be identified as needing to change size for any of the following reasons: as a result of displaying new / changed alternatives or predictions web applications need only register for this event once per element (the handler will remain valid for the lifetime of the element).
MediaCapabilities.encodingInfo() - Web APIs
Web › API › MediaCapabilities › encodingInfo
ning three boolean attributes: supported smooth powerefficient exceptions a typeerror is raised if the mediaconfiguration passed to the encodinginfo() method is invalid, either because the type is not video or audio, the contenttype is not a valid codec mime type, or any other error in the media configuration passed to the method, including omitting any of the media encoding configuration elements.
MediaDevices.getSupportedConstraints() - Web APIs
Web › API › MediaDevices › getSupportedConstraints
html <p>the following media constraints are supported by your browser:</p> <ul id="constraintlist"> </ul> css body { font: 15px arial, sans-serif; } javascript let constraintlist = document.getelementbyid("constraintlist"); let supportedconstraints = navigator.mediadevices.getsupportedconstraints(); for (let constraint in supportedconstraints) { if (supportedconstraints.hasownproperty(constraint)) { let elem = document.createelement("li"); elem.innerhtml = "<code>" + constraint + "</code>"; constraintlist.appendchild(elem); } } result specifications specificatio...
MediaError - Web APIs
Web › API › MediaError
the mediaerror interface represents an error which occurred while handling media in an html media element based on htmlmediaelement, such as <audio> or <video>.
MediaKeyStatusMap.entries() - Web APIs
Web › API › MediaKeyStatusMap › entries
the entries() read-only property of the mediakeystatusmap interface returns a new iterator object, containing an array of [key, value] pairs for each element in the status map, in insertion order.
MediaKeyStatusMap.keys() - Web APIs
Web › API › MediaKeyStatusMap › keys
the keys property of the mediakeystatusmap interface returns a new iterator object, containing keys for each element in the status map, in insertion order.
MediaKeyStatusMap.values() - Web APIs
Web › API › MediaKeyStatusMap › values
the values property of the mediakeystatusmap interface returns a new iterator object, containing values for each element in the status map, in insertion order.
MediaKeys - Web APIs
Web › API › MediaKeys
the mediakeys interface of encryptedmediaextensions api represents a set of keys that an associated htmlmediaelement can use for decryption of media data during playback.
MediaList - Web APIs
Web › API › MediaList
those set using a <link> element's media attribute.
MediaRecorder() - Web APIs
Web › API › MediaRecorder › MediaRecorder
this source media can come from a stream created using navigator.mediadevices.getusermedia() or from an <audio>, <video> or <canvas> element.
MediaRecorder.ondataavailable - Web APIs
Web › API › MediaRecorder › ondataavailable
var chunks = []; mediarecorder.onstop = function(e) { console.log("data available after mediarecorder.stop() called."); var audio = document.createelement('audio'); audio.controls = true; var blob = new blob(chunks, { 'type' : 'audio/ogg; codecs=opus' }); var audiourl = window.url.createobjecturl(blob); audio.src = audiourl; console.log("recorder stopped"); } mediarecorder.ondataavailable = function(e) { chunks.push(e.data); } ...
MediaRecorder.onstop - Web APIs
Web › API › MediaRecorder › onstop
mediarecorder.onstop = function(e) { console.log("data available after mediarecorder.stop() called."); var audio = document.createelement('audio'); audio.controls = true; var blob = new blob(chunks, { 'type' : 'audio/ogg; codecs=opus' }); var audiourl = window.url.createobjecturl(blob); audio.src = audiourl; console.log("recorder stopped"); } mediarecorder.ondataavailable = function(e) { chunks.push(e.data); } ...
MediaRecorder - Web APIs
Web › API › MediaRecorder
mediarecorder.stop(); console.log(mediarecorder.state); console.log("recorder stopped"); record.style.background = ""; record.style.color = ""; } mediarecorder.onstop = function(e) { console.log("data available after mediarecorder.stop() called."); var clipname = prompt('enter a name for your sound clip'); var clipcontainer = document.createelement('article'); var cliplabel = document.createelement('p'); var audio = document.createelement('audio'); var deletebutton = document.createelement('button'); clipcontainer.classlist.add('clip'); audio.setattribute('controls', ''); deletebutton.innerhtml = "delete"; cliplabel.innerhtml = clipname; clipcontainer.appendchild(audio); clipcontainer.
MediaSession - Web APIs
Web › API › MediaSession
the mediasession interface of the media session api allows a web page to provide custom behaviors for standard media playback interactions, and to report metadata that can be sent by the user agent to the device or operating system for presentation in standardized user interface elements.
MediaStream.getAudioTracks() - Web APIs
Web › API › MediaStream › getAudioTracks
example this example gets a webcam's audio and video in a stream using getusermedia(), attaches the stream to a <video> element, then sets a timer that, upon expiring, will stop the first audio track found on the stream.
MediaStreamConstraints - Web APIs
Web › API › MediaStreamConstraints
streams isolated in this way can only be displayed in a media element (<audio> or <video>) where the content is protected just as if cors cross-origin rules were in effect.
MediaStreamTrack.enabled - Web APIs
Web › API › MediaStreamTrack › enabled
"&#x25b6;&#xfe0f;" : "&#x23f8;&#xfe0f;"; myaudiotrack.enabled = newstate; } this creates a variable, newstate, which is the opposite of the current value of enabled, then uses that to select either the emoji character for the "play" icon or the character for the "pause" icon as the new innerhtml of the pause button's element.
MediaStreamTrack: ended event - Web APIs
Web › API › MediaStreamTrack › ended event
track.addeventlistener('ended', () => { let statuselem = document.getelementbyid("status-icon"); statuselem.src = "/images/stopped-icon.png"; }) you can also set up the event handler using the mediastreamtrack.onended property: track.onended = function() { let statuselem = document.getelementbyid("status-icon"); statuselem.src = "/images/stopped-icon.png"; } specifications specification status comment media capture and streamsthe def...
MediaStreamTrack.onended - Web APIs
Web › API › MediaStreamTrack › onended
track.onended = function(event) { let statuselem = document.getelementbyid("status-icon"); statuselem.src = "/images/stopped-icon.png"; } specifications specification status comment media capture and streamsthe definition of 'mediastreamtrack.onended' in that specification.
MediaStreamTrack.onmute - Web APIs
Web › API › MediaStreamTrack › onmute
example in this example, an onmute handler is established to set the content html of an element to display the "muted speaker" emoji.
MediaStreamTrack.stop() - Web APIs
Web › API › MediaStreamTrack › stop
function stopstreamedvideo(videoelem) { const stream = videoelem.srcobject; const tracks = stream.gettracks(); tracks.foreach(function(track) { track.stop(); }); videoelem.srcobject = null; } this works by obtaining the video element's stream from its srcobject property.
MediaTrackSupportedConstraints.aspectRatio - Web APIs
Web › API › MediaTrackSupportedConstraints › aspectRatio
example html content <div id="result"> </div> css content #result { font: 14px "arial", sans-serif; } javascript content let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().aspectratio) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result specifications specification status comment media capture and streamsthe definition of 'aspectratio' in that specification.
MediaTrackSupportedConstraints.autoGainControl - Web APIs
Web › API › MediaTrackSupportedConstraints › autoGainControl
html content <div id="result"> </div> css content #result { font: 14px "arial", sans-serif; } javascript content let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().autogaincontrol) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result specifications specification status comment media capture and streamsthe definition of 'autogaincontrol' in that specification.
MediaTrackSupportedConstraints.channelCount - Web APIs
Web › API › MediaTrackSupportedConstraints › channelCount
example html content <div id="result"> </div> css content #result { font: 14px "arial", sans-serif; } javascript content let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().channelcount) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result specifications specification status comment media capture and streamsthe definition of 'channelcount' in that specification.
MediaTrackSupportedConstraints.cursor - Web APIs
Web › API › MediaTrackSupportedConstraints › cursor
capturing is then started by calling getdisplaymedia() and attaching the returned stream to the video element referenced by the variable videoelem.
MediaTrackSupportedConstraints.deviceId - Web APIs
Web › API › MediaTrackSupportedConstraints › deviceId
example html content <div id="result"> </div> css content #result { font: 14px "arial", sans-serif; } javascript content let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().deviceid) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result specifications specification status comment media capture and streamsthe definition of 'deviceid' in that specification.
MediaTrackSupportedConstraints.displaySurface - Web APIs
Web › API › MediaTrackSupportedConstraints › displaySurface
capturing is then started by calling getdisplaymedia() and attaching the returned stream to the video element referenced by the variable videoelem.
MediaTrackSupportedConstraints.echoCancellation - Web APIs
Web › API › MediaTrackSupportedConstraints › echoCancellation
example html content <div id="result"> </div> css content #result { font: 14px "arial", sans-serif; } javascript content let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().echocancellation) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result specifications specification status comment media capture and streamsthe definition of 'echocancellation' in that specification.
MediaTrackSupportedConstraints.facingMode - Web APIs
Web › API › MediaTrackSupportedConstraints › facingMode
example html <div id="result"> </div> css #result { font: 14px "arial", sans-serif; } javascript let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().facingmode) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result specifications specification status comment media capture and streamsthe definition of 'facingmode' in that specification.
MediaTrackSupportedConstraints.frameRate - Web APIs
Web › API › MediaTrackSupportedConstraints › frameRate
javascript let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().framerate) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } html <div id="result"> </div> css #result { font: 14px "arial", sans-serif; } result the output, showing if your browser supports the framerate constraint, is: while this example is trivial, you can replace the ...
MediaTrackSupportedConstraints.groupId - Web APIs
Web › API › MediaTrackSupportedConstraints › groupId
example html content <div id="result"> </div> css content #result { font: 14px "arial", sans-serif; } javascript content let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().groupid) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result specifications specification status comment media capture and streamsthe definition of 'groupid' in that specification.
MediaTrackSupportedConstraints.height - Web APIs
Web › API › MediaTrackSupportedConstraints › height
example html content <div id="result"> </div> css content #result { font: 14px "arial", sans-serif; } javascript content let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().height) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result specifications specification status comment media capture and streamsthe definition of 'height' in that specification.
MediaTrackSupportedConstraints.latency - Web APIs
Web › API › MediaTrackSupportedConstraints › latency
example html content <div id="result"> </div> css content #result { font: 14px "arial", sans-serif; } javascript content let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().latency) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result specifications specification status comment media capture and streamsthe definition of 'latency' in that specification.
MediaTrackSupportedConstraints.logicalSurface - Web APIs
Web › API › MediaTrackSupportedConstraints › logicalSurface
capturing is then started by calling getdisplaymedia() and attaching the returned stream to the video element referenced by the variable videoelem.
MediaTrackSupportedConstraints.noiseSuppression - Web APIs
Web › API › MediaTrackSupportedConstraints › noiseSuppression
html content <div id="result"> </div> css content #result { font: 14px "arial", sans-serif; } javascript content let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().noisesuppression) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result specifications specification status comment media capture and streamsthe definition of 'noisesuppression' in that specification.
MediaTrackSupportedConstraints.sampleRate - Web APIs
Web › API › MediaTrackSupportedConstraints › sampleRate
example html content <div id="result"> </div> css content #result { font: 14px "arial", sans-serif; } javascript content let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().samplerate) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result specifications specification status comment media capture and streamsthe definition of 'samplerate' in that specification.
MediaTrackSupportedConstraints.sampleSize - Web APIs
Web › API › MediaTrackSupportedConstraints › sampleSize
example html content <div id="result"> </div> css content #result { font: 14px "arial", sans-serif; } javascript content let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().samplesize) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result specifications specification status comment media capture and streamsthe definition of 'samplesize' in that specification.
MediaTrackSupportedConstraints.volume - Web APIs
Web › API › MediaTrackSupportedConstraints › volume
example html content <div id="result"> </div> css content #result { font: 14px "arial", sans-serif; } javascript content let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().volume) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result ...
MediaTrackSupportedConstraints.width - Web APIs
Web › API › MediaTrackSupportedConstraints › width
example html content <div id="result"> </div> css content #result { font: 14px "arial", sans-serif; } javascript content let result = document.getelementbyid("result"); if (navigator.mediadevices.getsupportedconstraints().width) { result.innerhtml = "supported!"; } else { result.innerhtml = "not supported!"; } result specifications specification status comment media capture and streamsthe definition of 'width' in that specification.
Media Capabilities API - Web APIs
Web › API › Media Capabilities API
the media capabilities api provide more powerful features than say mediarecorder.istypesupported() or htmlmediaelement.canplaytype(), which only address general browser support, not performance.
MimeTypeArray - Web APIs
Web › API › MimeTypeArray
var mimetypes = navigator.mimetype; var flashplugin = mimetypes['video/x-flv']; if (typeof flashplugin === "undefined") { var vid = document.createelement('video'); // use vid.canplaytype() to test for a supported mime type.
MouseEvent() - Web APIs
Web › API › MouseEvent › MouseEvent
meaning 0 no button pressed 1 main button pressed (usually the left button) 2 secondary button pressed (usually the right button) 4 auxiliary button pressed (usually the middle button) "relatedtarget", optional and defaulting to null, of type eventtarget, that is the element just left (in case of a mouseenter or mouseover) or is entering (in case of a mouseout or mouseleave).
MouseEvent.initMouseEvent() - Web APIs
Web › API › MouseEvent › initMouseEvent
example html <div style="background:red; width:180px; padding:10px;"> <div id="out"></div> <input type="text"> </div> javascript document.body.onclick = function(){ e = arguments[0]; var dt = e.target,stag = dt.tagname.tolowercase(); document.getelementbyid("out").innerhtml = stag; }; var simulateclick = function(){ var evt = document.createevent("mouseevents"); evt.initmouseevent("click", true, true, window, 0, 0, 0, 80, 20, false, false, false, false, 0, null); document.body.dispatchevent(evt); } simulateclick(); result specifications specification status comment document object model (dom) level 3 events ...
MouseEvent.movementX - Web APIs
Web › API › MouseEvent › movementX
html <p id="log">move your mouse around.</p> javascript function logmovement(event) { log.insertadjacenthtml('afterbegin', `movement: ${event.movementx}, ${event.movementy}<br>`); while (log.childnodes.length > 128) log.lastchild.remove() } const log = document.getelementbyid('log'); document.addeventlistener('mousemove', logmovement); result specifications specification status comment pointer lockthe definition of 'mouseevent.movementx' in that specification.
MouseEvent.movementY - Web APIs
Web › API › MouseEvent › movementY
html <p id="log">move your mouse around.</p> javascript function logmovement(event) { log.innertext = `movement: ${event.movementx}, ${event.movementy}\n${log.innertext}`; } const log = document.getelementbyid('log'); document.addeventlistener('mousemove', logmovement); result specifications specification status comment pointer lockthe definition of 'mouseevent.movementy' in that specification.
MouseEvent.region - Web APIs
Web › API › MouseEvent › region
<canvas id="canvas"></canvas> <script> var canvas = document.getelementbyid("canvas"); var ctx = canvas.getcontext("2d"); ctx.beginpath(); ctx.arc(70, 80, 10, 0, 2 * math.pi, false); ctx.fill(); ctx.addhitregion({id: "circle"}); canvas.addeventlistener("mousemove", function(event){ if(event.region) { console.log("hit region: " + event.region); } }); </script> ...
MouseEvent.relatedTarget - Web APIs
Web › API › MouseEvent › relatedTarget
html <body id="body"> <div id="outer"> <div id="red"></div> <div id="blue"></div> </div> <p id="log"></p> </body> css #outer { width: 250px; height: 125px; display: flex; } #red { flex-grow: 1; background: red; } #blue { flex-grow: 1; background: blue; } #log { max-height: 120px; overflow-y: scroll; } javascript const mouseoutlog = document.getelementbyid('log'), red = document.getelementbyid('red'), blue = document.getelementbyid('blue'); red.addeventlistener('mouseover', overlistener); red.addeventlistener('mouseout', outlistener); blue.addeventlistener('mouseover', overlistener); blue.addeventlistener('mouseout', outlistener); function outlistener(event) { let related = event.relatedtarget ?
MouseEvent.screenX - Web APIs
Web › API › MouseEvent › screenX
mouse to see its position.</p> <p id="screen-log"></p> javascript let screenlog = document.queryselector('#screen-log'); document.addeventlistener('mousemove', logkey); function logkey(e) { screenlog.innertext = ` screen x/y: ${e.screenx}, ${e.screeny} client x/y: ${e.clientx}, ${e.clienty}`; } result routing an event when you trap events on the window, document, or other roomy elements, you can get the coordinates of that event (e.g., a click) and route it properly, as the following example demonstrates: function checkclickmap(e) { if (e.screenx < 50) doredbutton(); if (50 <= e.screenx && e.screenx < 100) doyellowbutton(); if (e.screenx >= 100) doredbutton(); } specifications specification status comment css object model (cssom) view modulethe...
MouseEvent - Web APIs
Web › API › MouseEvent
html <p><label><input type="checkbox" id="checkbox"> checked</label> <p><button id="button">click me</button> javascript function simulateclick() { var evt = new mouseevent("click", { bubbles: true, cancelable: true, view: window }); var cb = document.getelementbyid("checkbox"); //element to click on var canceled = !cb.dispatchevent(evt); if(canceled) { // a handler called preventdefault alert("canceled"); } else { // none of the handlers called preventdefault alert("not canceled"); } } document.getelementbyid("button").addeventlistener('click', simulateclick); result specifications specification status comment...
msPlayToDisabled - Web APIs
Web › API › MsPlayToDisabled
the msplaytodisabled attribute extends the htmlembedelement, htmlimageelement, htmlmediaelement, and htmlobject interfaces.
msPlayToPreferredSourceUri - Web APIs
Web › API › MsPlayToPreferredSourceUri
example <video src="http://www.contoso.com/videos/video.mp4" msplaytopreferredsourceuri="http://www.contoso.com/catalogid=1234" /> var video = document.createelement('video'); document.body.appendchild(video); video.src = "http://www.contoso.com/videos/video.mp4"; video.msplaytopreferredsourceuri = "http://www.contoso.com/catalogid=1234"; see also microsoft playready content access and protection technology is a set of technologies that can be used to distribute audio/video content more securely over a network, and help prevent the unauthorized us...
msPlayToPrimary - Web APIs
Web › API › MsPlayToPrimary
example // microsoft extensions interface htmlimageelement : htmlelement { attribute boolean msplaytodisabled; attribute boolean msplaytoprimary; attribute domstring msplaytopreferredsourceuri; }; see also htmlmediaelement ...
msSetMediaProtectionManager - Web APIs
Web › API › MsSetMediaProtectionManager
syntax htmlmediaelement.mssetmediaprotectionmanager(mediaprotectionmanager); parameters the windows.media.protection namespace provides classes to manage digital rights management (drm) media contents.
MutationObserver.takeRecords() - Web APIs
Web › API › MutationObserver › takeRecords
const targetnode = document.queryselector("#someelement"); const observeroptions = { childlist: true, attributes: true } const observer = new mutationobserver(callback); observer.observe(targetnode, observeroptions); /* ...later, when it's time to stop observing...
MutationObserver - Web APIs
Web › API › MutationObserver
// select the node that will be observed for mutations const targetnode = document.getelementbyid('some-id'); // options for the observer (which mutations to observe) const config = { attributes: true, childlist: true, subtree: true }; // callback function to execute when mutations are observed const callback = function(mutationslist, observer) { // use traditional 'for loops' for ie 11 for(let mutation of mutationslist) { if (mutation.type === 'childlist') { ...
MutationObserverInit.attributeOldValue - Web APIs
Web › API › MutationObserverInit › attributeOldValue
example in this example, a mutation observer is set up to watch for changes to the status and username attributes in any elements contained within a subtree that displays the names of users in a chat room.
MutationObserverInit.attributes - Web APIs
Web › API › MutationObserverInit › attributes
example in this example, a mutation observer is set up to watch for changes to the status and username attributes in any elements contained within a subtree that displays the names of users in a chat room.
MutationObserverInit.characterData - Web APIs
Web › API › MutationObserverInit › characterData
note that this doesn't monitor content of an htmlelement, even if it only contains text inside, as it only monitors text nodes themselves.
MutationRecord - Web APIs
Web › API › MutationRecord
for attributes, it is the element whose attribute changed.
Navigator.getGamepads() - Web APIs
Web › API › Navigator › getGamepads
elements in the array may be null if a gamepad disconnects during a session, so that the remaining gamepads retain the same index.
Navigator.getUserMedia() - Web APIs
Web › API › Navigator › getUserMedia
your callback can then assign the stream to the desired object (such as an <audio> or <video> element), as shown in the following example: function(stream) { var video = document.queryselector('video'); video.srcobject = stream; video.onloadedmetadata = function(e) { // do something with the video here.
Navigator.productSub - Web APIs
Web › API › Navigator › productSub
example <script> function prodsub() { var dt = document.getelementbyid("d").childnodes[0]; dt.data = window.navigator.productsub; } </script> <button onclick="prodsub();">productsub</button> // returns: 20010725 notes on ie, this property returns undefined.
Navigator.requestMediaKeySystemAccess() - Web APIs
Web › API › Navigator › requestMediaKeySystemAccess
the first element with a satisfiable configuration will be used.
Navigator.sendBeacon() - Web APIs
Web › API › Navigator › sendBeacon
creating an <img> element and setting its src in the unload handler.
NavigatorLanguage.languages - Web APIs
Web › API › NavigatorLanguage › languages
the value of navigator.language is the first element of the returned array.
Online and offline events - Web APIs
Web › API › NavigatorOnLine › Online and offline events
here's the javascript part: window.addeventlistener('load', function() { var status = document.getelementbyid("status"); var log = document.getelementbyid("log"); function updateonlinestatus(event) { var condition = navigator.online ?
NavigatorPlugins.plugins - Web APIs
Web › API › NavigatorPlugins › plugins
var pluginslength = navigator.plugins.length; document.body.innerhtml = pluginslength + " plugin(s)<br>" + '<table id="plugintable"><thead>' +'<tr><th>name</th><th>filename</th><th>description</th><th>version</th></tr>' +'</thead><tbody></tbody></table>'; var table = document.getelementbyid('plugintable'); for(var i = 0; i < pluginslength; i++) { let newrow = table.insertrow(); newrow.insertcell().textcontent = navigator.plugins[i].name; newrow.insertcell().textcontent = navigator.plugins[i].filename; newrow.insertcell().textcontent = navigator.plugins[i].description; newrow.insertcell().textcontent = navigator.plugins[i].version?navigator.plugins[i].version:""; } no...
Node.baseURIObject - Web APIs
Web › API › Node › baseURIObject
the node.baseuriobject property returns the nsiuri representing the node's (typically a document or an element) base url.
Node.contains() - Web APIs
Web › API › Node › contains
syntax node.contains( othernode ) example this function checks to see if an element is in the page's body.
Node.getUserData() - Web APIs
Web › API › Node › getUserData
element.dataset or weakmap can be used instead.
Node.hasChildNodes() - Web APIs
Web › API › Node › hasChildNodes
example let foo = document.getelementbyid('foo'); if (foo.haschildnodes()) { // do something with 'foo.childnodes' } polyfill here is one possible polyfill: ;(function(prototype) { prototype.haschildnodes = prototype.haschildnodes || function() { return !!this.firstchild; } })(node.prototype); there are various ways to determine whether the node has a child node: node.haschildnodes() node.firstchild != null (or just node.firstchild) node.childnodes && node.childnodes.length (or node.childnodes.length > 0) specifications spec...
Node.isSameNode() - Web APIs
Web › API › Node › isSameNode
html <div>this is the first element.</div> <div>this is the second element.</div> <div>this is the first element.</div> <p id="output"></p> css #output { width: 440px; border: 2px solid black; border-radius: 5px; padding: 10px; margin-top: 20px; display: block; } javascript let output = document.getelementbyid("output"); let divlist = document.getelementsbytagname("div"); output.innerhtml += "div 0 same as div ...
Node.nodeValue - Web APIs
Web › API › Node › nodeValue
the following table shows the return values for different elements: node value of nodevalue cdatasection content of the cdata section comment content of the comment document null documentfragment null documenttype null element null namednodemap null entityreference null notation null processinginstruction entire content ex...
Node.normalize() - Web APIs
Web › API › Node › normalize
syntax element.normalize(); example let wrapper = document.createelement("div"); wrapper.appendchild( document.createtextnode("part 1 ") ); wrapper.appendchild( document.createtextnode("part 2 ") ); // at this point, wrapper.childnodes.length === 2 // wrapper.childnodes[0].textcontent === "part 1 " // wrapper.childnodes[1].textcontent === "part 2 " wrapper.normalize(); // now, wrapper.childnodes.length === 1 // wrapper.childnodes[0].textcontent === "part 1 part 2 " specifications specification status comment domthe definition of 'node: normalize' in that ...
Node.outerText - Web APIs
Web › API › Node › outerText
see htmlelement.outertext.
Node.parentNode - Web APIs
Web › API › Node › parentNode
the parent of an element is an element node, a document node, or a documentfragment node.
Node.prefix - Web APIs
Web › API › Node › prefix
in dom4 this api was moved from node to the element and attr interfaces.
Node.rootNode - Web APIs
Web › API › Node › rootNode
therefore a node obtained, for example, using node.firstchild or node.previoussibling may refer to a whitespace text node rather than the actual element the author intended to get.
NodeFilter.acceptNode() - Web APIs
Web › API › NodeFilter › acceptNode
example var nodeiterator = document.createnodeiterator( // node to use as root document.getelementbyid('someid'), // only consider nodes that are text nodes (nodetype 3) nodefilter.show_text, // object containing the function to use for the acceptnode method // of the nodefilter { acceptnode: function(node) { // logic to determine whether to accept, reject or skip node // in this case, only accept nodes that have content // other than whitespace if ( !
NodeFilter - Web APIs
Web › API › NodeFilter
example const nodeiterator = document.createnodeiterator( // node to use as root document.getelementbyid('someid'), // only consider nodes that are text nodes (nodetype 3) nodefilter.show_text, // object containing the function to use for the acceptnode method // of the nodefilter { acceptnode: function(node) { // logic to determine whether to accept, reject or skip node // in this case, only accept nodes that have content // other than whitespace if ( !
NodeIterator.detach() - Web APIs
Web › API › NodeIterator › detach
syntax nodeiterator.detach(); example var nodeiterator = document.createnodeiterator( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); nodeiterator.detach(); // detaches the iterator nodeiterator.nextnode(); // throws an invalid_state_err exception specifications specification status comment domthe definition of 'nodeiterator.detach' in that specification.
NodeIterator.expandEntityReferences - Web APIs
Web › API › NodeIterator › expandEntityReferences
syntax expand = nodeiterator.expandentityreferences; example var nodeiterator = document.createnodeiterator( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); expand = nodeiterator.expandentityreferences; specifications specification status comment document object model (dom) level 2 traversal and range specificationthe definition of 'nodeiterator.expandentityreferences' in that specification.
NodeIterator.filter - Web APIs
Web › API › NodeIterator › filter
syntax nodefilter = nodeiterator.filter; example const nodeiterator = document.createnodeiterator( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); nodefilter = nodeiterator.filter; specifications specification status comment domthe definition of 'nodeiterator.filter' in that specification.
NodeIterator.nextNode() - Web APIs
Web › API › NodeIterator › nextNode
syntax node = nodeiterator.nextnode(); example var nodeiterator = document.createnodeiterator( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false // this optional argument is not used any more ); currentnode = nodeiterator.nextnode(); // returns the next node specifications specification status comment domthe definition of 'nodeiterator.nextnode' in that specification.
NodeIterator.pointerBeforeReferenceNode - Web APIs
Web › API › NodeIterator › pointerBeforeReferenceNode
syntax flag = nodeiterator.pointerbeforereferencenode; example var nodeiterator = document.createnodeiterator( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); flag = nodeiterator.pointerbeforereferencenode; specifications specification status comment domthe definition of 'nodeiterator.pointerbeforereferencenode' in that specification.
NodeIterator.previousNode() - Web APIs
Web › API › NodeIterator › previousNode
syntax node = nodeiterator.previousnode(); example var nodeiterator = document.createnodeiterator( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false // this optional argument is not used any more ); currentnode = nodeiterator.nextnode(); // returns the next node previousnode = nodeiterator.previousnode(); // same result, since we backtracked to the previous node specifications specification status comment domthe definition of 'nodeit...
NodeIterator.referenceNode - Web APIs
Web › API › NodeIterator › referenceNode
syntax node = nodeiterator.referencenode; example var nodeiterator = document.createnodeiterator( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); node = nodeiterator.referencenode; specifications specification status comment domthe definition of 'nodeiterator.referencenode' in that specification.
NodeIterator.root - Web APIs
Web › API › NodeIterator › root
syntax root = nodeiterator.root; example var nodeiterator = document.createnodeiterator( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); root = nodeiterator.root; // document.body in this case specifications specification status comment domthe definition of 'nodeiterator.root' in that specification.
NodeIterator - Web APIs
Web › API › NodeIterator
nodefilter.show_element 1 shows element nodes.
NodeList.entries() - Web APIs
Web › API › NodeList › entries
example var node = document.createelement("div"); var kid1 = document.createelement("p"); var kid2 = document.createtextnode("hey"); var kid3 = document.createelement("span"); node.appendchild(kid1); node.appendchild(kid2); node.appendchild(kid3); var list = node.childnodes; // using for..of for(var entry of list.entries()) { console.log(entry); } results in: array [ 0, <p> ] array [ 1, #text "hey" ] array [ 2, <span> ] ...
NodeList.item() - Web APIs
Web › API › NodeList › item
alternate syntax javascript also offers an array-like bracketed syntax for obtaining an item from a nodelist by index: nodeitem = nodelist[index] example var tables = document.getelementsbytagname("table"); var firsttable = tables.item(1); // or simply tables[1] - returns the second table in the dom specifications specification status comment domthe definition of 'nodelist: item' in that specification.
NodeList.keys() - Web APIs
Web › API › NodeList › keys
example var node = document.createelement("div"); var kid1 = document.createelement("p"); var kid2 = document.createtextnode("hey"); var kid3 = document.createelement("span"); node.appendchild(kid1); node.appendchild(kid2); node.appendchild(kid3); var list = node.childnodes; // using for..of for(var key of list.keys()) { console.log(key); } the result is: 0 1 2 ...
NodeList.length - Web APIs
Web › API › NodeList › length
// all the paragraphs in the document var items = document.getelementsbytagname("p"); // for each item in the list, // append the entire element as a string of html var gross = ""; for (var i = 0; i < items.length; i++) { gross += items[i].innerhtml; } // gross is now all the html for the paragraphs specifications specification status comment domthe definition of 'nodelist: length' in that specification.
NodeList.values() - Web APIs
Web › API › NodeList › values
example var node = document.createelement("div"); var kid1 = document.createelement("p"); var kid2 = document.createtextnode("hey"); var kid3 = document.createelement("span"); node.appendchild(kid1); node.appendchild(kid2); node.appendchild(kid3); var list = node.childnodes; // using for..of for(var value of list.values()) { console.log(value); } the result is: <p> #text "hey" <span> ...
Notification.maxActions - Web APIs
Web › API › Notification › maxActions
effectively, this is the maximum number of elements in notification.actions array which will be respected by the user agent.
Using the Notifications API - Web APIs
Web › API › Notifications API › Using the Notifications API
w.addeventlistener('load', function () { // at first, let's check if we have permission for notification // if not, let's ask for it if (window.notification && notification.permission !== "granted") { notification.requestpermission(function (status) { if (notification.permission !== status) { notification.permission = status; } }); } var button = document.getelementsbytagname('button')[0]; button.addeventlistener('click', function () { // if the user agreed to get notified // let's try to send ten notifications if (window.notification && notification.permission === "granted") { var i = 0; // using an interval cause some browsers (including firefox) are blocking notifications if there are too much in a certain time.
NotifyAudioAvailableEvent - Web APIs
Web › API › NotifyAudioAvailableEvent
the non-standard, obsolete, notifyaudioavailableevent interface defines the event sent to audio elements when the audio buffer is full.
OrientationSensor.quaternion - Web APIs
Web › API › OrientationSensor › quaternion
the quaternion read-only property of the orientationsensor interface returns a four element array whose elements contain the components of the unit quaternion representing the device's orientation.
OrientationSensor - Web APIs
Web › API › OrientationSensor
absoluteorientationsensor relativeorientationsensor properties orientationsensor.quaternion returns a four element array whose elements contain the components of the unit quaternion representing the device's orientation.
ParentNode.replaceChildren() - Web APIs
Web › API › ParentNode › replaceChildren
const noselect = document.getelementbyid('no'); const yesselect = document.getelementbyid('yes'); const nobtn = document.getelementbyid('to-no'); const yesbtn = document.getelementbyid('to-yes'); yesbtn.addeventlistener('click', () => { const selectedtransferoptions = document.queryselectorall('#no option:checked'); const existingyesoptions = document.queryselectorall('#yes option'); yesselect.replacechildren(...selectedtrans...
PaymentAddress - Web APIs
Web › API › PaymentAddress
paymentaddress.regioncode read only a domstring specifying the region of the address, represented as a "code element" of an iso3166-2 country subdivision name (e.g.
PaymentRequest.canMakePayment() - Web APIs
Web › API › PaymentRequest › canMakePayment
let's see if we can use basic card const supportsbasiccard = await new paymentrequest( [{ supportedmethods: "basic-card" }], details ).canmakepayment(); if (supportsbasiccard) { // show basic card support return; } // otherwise, make payments using html form element } specifications specification status comment payment request apithe definition of 'canmakepayment()' in that specification.
PaymentRequest.show() - Web APIs
Web › API › PaymentRequest › show
} document.getelementbyid("buybutton").onclick = requestpayment; specifications specification status comment payment request apithe definition of 'show(optional detailspromise)' in that specification.
PerformanceObserverEntryList.getEntries() - Web APIs
Web › API › PerformanceObserverEntryList › getEntries
"initiatortype", the type of the initiating resource (for example an html element).
PerformanceResourceTiming.initiatorType - Web APIs
Web › API › PerformanceResourceTiming › initiatorType
the value of this string is as follows: if the initiator is a element, the property returns the element's localname.
Using Performance Timeline - Web APIs
Web › API › Performance Timeline › Using Performance Timeline
function log(s) { var o = document.getelementsbytagname("output")[0]; o.innerhtml += s + " <br>"; } function do_work (n) { for (var i=0 ; i < n; i++) { var m = math.random(); } } function print_perf_entry(pe) { log("..name: " + pe.name + "; entrytype: " + pe.entrytype + "; starttime: " + pe.starttime + "; duration: " + pe.duration); } function print_performanceentries() { if (performance.mark ===...
Performance Timeline - Web APIs
Web › API › Performance Timeline
the methods are: getentries() returns all recorded performance entries or, optionally, the entries based on the specified name, performance type and/or the initiatortype (such as an html element).
PluginArray - Web APIs
Web › API › PluginArray
var pluginslength = navigator.plugins.length; document.body.innerhtml = pluginslength + " plugin(s)<br>" + '<table id="plugintable"><thead>' +'<tr><th>name</th><th>filename</th><th>description</th><th>version</th></tr>' +'</thead><tbody></tbody></table>'; var table = document.getelementbyid('plugintable'); for(var i = 0; i < pluginslength; i++) { let newrow = table.insertrow(); newrow.insertcell().textcontent = navigator.plugins[i].name; newrow.insertcell().textcontent = navigator.plugins[i].filename; newrow.insertcell().textcontent = navigator.plugins[i].description; newrow.insertcell().textcontent = navigator.plugins[i].version?navigator.plugins[i].version:""; } th...
PointerEvent.pointerType - Web APIs
Web › API › PointerEvent › pointerType
targetelement.addeventlistener('pointerdown', function(event) { // call the appropriate pointer type handler switch (event.pointertype) { case 'mouse': process_pointer_mouse(event); break; case 'pen': process_pointer_pen(event); break; case 'touch': process_pointer_touch(event); break; default: console.log(`pointertype ${event.pointertype} is not su...
PointerEvent.pressure - Web APIs
Web › API › PointerEvent › pressure
someelement.addeventlistener('pointerdown', function(event) { if (event.pressure == 0) { // no pressure process_no_pressure(event); } else if (event.pressure == 1) { // maximum pressure process_max_pressure(event); } else { // default process_pressure(event); } }, false); specifications specification status comment pointer events – level 2the defin...
PointerEvent.tangentialPressure - Web APIs
Web › API › PointerEvent › tangentialPressure
someelement.addeventlistener('pointerdown', function(event) { if (event.tangentialpressure == 0) { // no pressure process_no_tanpressure(event); } else if (event.tangentialpressure == 1) { // maximum pressure process_max_tanpressure(event); } else { // default process_tanpressure(event); } }, false); specifications specification status comment pointe...
PointerEvent.tiltX - Web APIs
Web › API › PointerEvent › tiltX
someelement.addeventlistener("pointerdown", function(event) { process_tilt(event.tiltx, event.tilty); }, false); specifications specification status comment pointer events – level 2the definition of 'tiltx' in that specification.
PointerEvent.tiltY - Web APIs
Web › API › PointerEvent › tiltY
someelement.addeventlistener("pointerdown", function(event) { process_tilt(event.tiltx, event.tilty); }, false); specifications specification status comment pointer events – level 2the definition of 'tilty' in that specification.
PointerEvent.twist - Web APIs
Web › API › PointerEvent › twist
someelement.addeventlistener('pointerdown', function(event) { if (event.twist == 0) { // no twist process_no_twist(event); } else { // default process_twist(event); } }, false); specifications specification status comment pointer events – level 2the definition of 'twist' in that specification.
ProgressEvent - Web APIs
Web › API › ProgressEvent
var progressbar = document.getelementbyid("p"), client = new xmlhttprequest() client.open("get", "magical-unicorns") client.onprogress = function(pe) { if(pe.lengthcomputable) { progressbar.max = pe.total progressbar.value = pe.loaded } } client.onloadend = function(pe) { progressbar.value = pe.loaded } client.send() specifications specification status comment xmlhttprequestthe definition o...
PublicKeyCredential - Web APIs
Web › API › PublicKeyCredential
use from within an <iframe> element will not have any effect.
PublicKeyCredentialCreationOptions - Web APIs
Web › API › PublicKeyCredentialCreationOptions
publickeycredentialcreationoptions.pubkeycredparams an array of element which specify the desired features of the credential, including its type and the algorithm used for the cryptographic signature operations.
PublicKeyCredentialRequestOptions.allowCredentials - Web APIs
Web › API › PublicKeyCredentialRequestOptions › allowCredentials
syntax allowcredentials = publickeycredentialrequestoptions.allowcredentials value an array whose elements are objects with the following properties: type a string describing type of public-key credential to be created.
PushSubscription.getKey() - Web APIs
Web › API › PushSubscription › getKey
ubbtn.disabled = false; if (!subscription) { console.log('not yet subscribed to push') // we aren't subscribed to push, so set ui // to allow the user to enable push return; } // set your ui to show they have subscribed for // push messages subbtn.textcontent = 'unsubscribe from push messaging'; ispushenabled = true; // initialize status, which includes setting ui elements for subscribed status // and updating subscribers list via push var endpoint = subscription.endpoint; var key = subscription.getkey('p256dh'); var auth = subscription.getkey('auth'); ...
RTCDataChannel.bufferedAmount - Web APIs
Web › API › RTCDataChannel › bufferedAmount
*/ function showbufferedamount(channel) { let el = document.getelementbyid("buffersize"); el.innerhtml = channel.bufferedamount + " bytes"; } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcdatachannel.bufferedamount' in that specification.
RTCDataChannel: close event - Web APIs
Web › API › RTCDataChannel › close event
bubbles no cancelable no interface event event handler property rtcdatachannel.onclose examples this example sets up a handler for the close event for the rtcdatachannel named dc; its responsibility in this example is to update user interface elements to reflect that there is no longer an ongoing call, and to allow a new call to be started.
RTCDataChannel.onclose - Web APIs
Web › API › RTCDataChannel › onclose
let pc = new rtcpeerconnection(); let dc = pc.createdatachannel("messagechannel")}}; dc.onopen = function(event) { document.getelementbyid("messagebox").disabled = false; document.getelementbyid("sendbutton").disabled = false; }; dc.onclose = function(event) { document.getelementbyid("messagebox").disabled = true; document.getelementbyid("sendbutton").disabled = true; } /* now negotiate the connection, etc...
RTCIceCandidatePair - Web APIs
Web › API › RTCIceCandidatePair
var icetransport = pc.getsenders()[0].transport.icetransport; var localproto = document.getelementbyid("local-protocol"); var remoteproto = document.getelementbyid("remote-protocol"); icetransport.onselectedcandidatepairchange = function(event) { var pair = icetransport.getselectedcandidatepair(); localprotocol.innertext = pair.local.protocol.touppercase(); remoteprotocol.innertext = pair.remote.protocol.touppercase(); } specifications specification status comment ...
RTCIceTransport.getSelectedCandidatePair() - Web APIs
Web › API › RTCIceTransport › getSelectedCandidatePair
var icetransport = pc.getsenders()[0].transport.icetransport; var localproto = document.getelementbyid("local-protocol"); var remoteproto = document.getelementbyid("remote-protocol"); icetransport.onselectedcandidatepairchange = function(event) { var pair = icetransport.getselectedcandidatepair(); localprotocol.innertext = pair.local.protocol.touppercase(); remoteprotocol.innertext = pair.remote.protocol.touppercase(); } specifications specification status comment ...
RTCIceTransport.onselectedcandidatepairchange - Web APIs
Web › API › RTCIceTransport › onselectedcandidatepairchange
var icetransport = pc.getsenders()[0].transport.icetransport; var localproto = document.getelementbyid("local-protocol"); var remoteproto = document.getelementbyid("remote-protocol"); icetransport.onselectedcandidatepairchange = function(event) { var pair = icetransport.getselectedcandidatepair(); localprotocol.innertext = pair.local.protocol.touppercase(); remoteprotocol.innertext = pair.remote.protocol.touppercase(); } specifications specification status comment ...
RTCInboundRtpStreamStats.qpSum - Web APIs
Web › API › RTCInboundRtpStreamStats › qpSum
for example, for the vp8 codec, the qp value can be anywhere from 1 to 127 and is found in the frame header element "y_ac_qi", whose value is defined in rfc 6386: 19.2.
RTCOutboundRtpStreamStats.qpSum - Web APIs
Web › API › RTCOutboundRtpStreamStats › qpSum
for example, for the vp8 codec, the qp value can be anywhere from 1 to 127 and is found in the frame header element "y_ac_qi", whose value is defined in rfc 6386: 19.2.
RTCPeerConnection.onicegatheringstatechange - Web APIs
Web › API › RTCPeerConnection › onicegatheringstatechange
the status is simply presented as text in a <div> element: <div id="icestatus"></div> the actual event handler looks like this: pc.onicegatheringstatechange = function() { let label = "unknown"; switch(pc.icegatheringstate) { case "new": case "complete": label = "idle"; break; case "gathering": label = "determining route"; break; } document.getelementbyid("icestatus").innerhtml = label; } specifications...
RTCPeerConnection.removeStream() - Web APIs
Web › API › RTCPeerConnection › removeStream
example var pc, videostream; navigator.getusermedia({video: true}, function(stream) { pc = new rtcpeerconnection(); videostream = stream; pc.addstream(stream); } document.getelementbyid("closebutton").addeventlistener("click", function(event) { pc.removestream(videostream); pc.close(); }, false); ...
RTCPeerConnection.removeTrack() - Web APIs
Web › API › RTCPeerConnection › removeTrack
var pc, sender; navigator.getusermedia({video: true}, function(stream) { pc = new rtcpeerconnection(); var track = stream.getvideotracks()[0]; sender = pc.addtrack(track, stream); }); document.getelementbyid("closebutton").addeventlistener("click", function(event) { pc.removetrack(sender); pc.close(); }, false); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcpeerconnection.removetrack()' in that specification.
RTCPeerConnection.setRemoteDescription() - Web APIs
Web › API › RTCPeerConnection › setRemoteDescription
function handleoffer(msg) { createmypeerconnection(); mypeerconnection.setremotedescription(msg.description).then(function () { return navigator.mediadevices.getusermedia(mediaconstraints); }) .then(function(stream) { document.getelementbyid("local_video").srcobject = stream; return mypeerconnection.addstream(stream); }) .then(function() { return mypeerconnection.createanswer(); }) .then(function(answer) { return mypeerconnection.setlocaldescription(answer); }) .then(function() { // send the answer to the remote peer using the signaling server }) .catch(handlegetusermediaerror); } after creating o...
RTCRtpStreamStats.qpSum - Web APIs
Web › API › RTCRtpStreamStats › qpSum
for example, for the vp8 codec, the qp value can be anywhere from 1 to 127 and is found in the frame header element "y_ac_qi", whose value is defined in rfc 6386: 19.2.
Range.cloneContents() - Web APIs
Web › API › Range › cloneContents
syntax documentfragment = range.clonecontents(); example range = document.createrange(); range.selectnode(document.getelementsbytagname("div").item(0)); documentfragment = range.clonecontents(); document.body.appendchild(documentfragment); specifications specification status comment domthe definition of 'range.clonecontents()' in that specification.
Range.cloneRange() - Web APIs
Web › API › Range › cloneRange
syntax clone = range.clonerange(); example range = document.createrange(); range.selectnode(document.getelementsbytagname("div").item(0)); clone = range.clonerange(); specifications specification status comment domthe definition of 'range.clonerange()' in that specification.
Range.collapse() - Web APIs
Web › API › Range › collapse
example var range = document.createrange(); referencenode = document.getelementsbytagname("div").item(0); range.selectnode(referencenode); range.collapse(true); specifications specification status comment domthe definition of 'range.collapse()' in that specification.
Range.compareBoundaryPoints() - Web APIs
Web › API › Range › compareBoundaryPoints
example var range, sourcerange, compare; range = document.createrange(); range.selectnode(document.getelementsbytagname("div")[0]); sourcerange = document.createrange(); sourcerange.selectnode(document.getelementsbytagname("div")[1]); compare = range.compareboundarypoints(range.start_to_end, sourcerange); specifications specification status comment domthe definition of 'range.compareboundarypoints()' in that specification.
Range.compareNode() - Web APIs
Web › API › Range › compareNode
example range = document.createrange(); range.selectnode(document.getelementsbytagname("div").item(0)); returnvalue = range.comparenode(document.getelementsbytagname("p").item(0)); notes this method is obsolete; you should use the w3c dom range.compareboundarypoints() method.
Range.comparePoint() - Web APIs
Web › API › Range › comparePoint
example range = document.createrange(); range.selectnode(document.getelementsbytagname('div').item(0)); returnvalue = range.comparepoint(document.getelementsbytagname('p').item(0), 1); specification specification status comment domthe definition of 'range.comparepoint()' in that specification.
Range.createContextualFragment() - Web APIs
Web › API › Range › createContextualFragment
example var tagstring = "<div>i am a div node</div>"; var range = document.createrange(); // make the parent of the first div in the document becomes the context node range.selectnode(document.getelementsbytagname("div").item(0)); var documentfragment = range.createcontextualfragment(tagstring); document.body.appendchild(documentfragment); specification specification status comment dom parsing and serializationthe definition of 'range.createcontextualfragment()' in that specification.
Range.deleteContents() - Web APIs
Web › API › Range › deleteContents
syntax range.deletecontents() example range = document.createrange(); range.selectnode(document.getelementsbytagname("div").item(0)); range.deletecontents(); specifications specification status comment domthe definition of 'range.deletecontents()' in that specification.
Range.detach() - Web APIs
Web › API › Range › detach
syntax range.detach(); example var range = document.createrange(); range.selectnode(document.getelementsbytagname("div").item(0)); range.detach(); specifications specification status comment domthe definition of 'range.detach()' in that specification.
Range.insertNode() - Web APIs
Web › API › Range › insertNode
example range = document.createrange(); newnode = document.createelement("p"); newnode.appendchild(document.createtextnode("new node inserted here")); range.selectnode(document.getelementsbytagname("div").item(0)); range.insertnode(newnode); specifications specification status comment domthe definition of 'range.insertnode()' in that specification.
Range.intersectsNode() - Web APIs
Web › API › Range › intersectsNode
example var range = document.createrange(); range.selectnode(document.getelementsbytagname("div").item(0)); var bool = range.intersectsnode(document.getelementsbytagname("p").item(0)); specification specification status comment domthe definition of 'range.intersectnode()' in that specification.
Range.isPointInRange() - Web APIs
Web › API › Range › isPointInRange
example range = document.createrange(); range.selectnode(document.getelementsbytagname("div").item(0)); bool = range.ispointinrange(document.getelementsbytagname("p").item(0),1); specification specification status comment domthe definition of 'range.ispointinrange()' in that specification.
Range.selectNode() - Web APIs
Web › API › Range › selectNode
example let range = document.createrange(); let referencenode = document.getelementsbytagname('div').item(0); range.selectnode(referencenode); specifications specification status comment domthe definition of 'range.selectnode()' in that specification.
Range.setEnd() - Web APIs
Web › API › Range › setEnd
example const range = document.createrange(); const endnode = document.getelementsbytagname('p').item(3); const endoffset = endnode.childnodes.length; range.setend(endnode, endoffset); setend() is commonly used in conjunction with setstart() to fully configure a range.
Range.setEndAfter() - Web APIs
Web › API › Range › setEndAfter
example var range = document.createrange(); var referencenode = document.getelementsbytagname('div').item(0); range.setendafter(referencenode); specifications specification status comment domthe definition of 'range.setendafter()' in that specification.
Range.setEndBefore() - Web APIs
Web › API › Range › setEndBefore
example var range = document.createrange(); var referencenode = document.getelementsbytagname("div").item(0); range.setendbefore(referencenode); specifications specification status comment domthe definition of 'range.setendbefore()' in that specification.
Range.setStartAfter() - Web APIs
Web › API › Range › setStartAfter
example var range = document.createrange(); var referencenode = document.getelementsbytagname("div").item(0); range.setstartafter(referencenode); specifications specification status comment domthe definition of 'range.setstartafter()' in that specification.
Range.setStartBefore() - Web APIs
Web › API › Range › setStartBefore
example var range = document.createrange(); var referencenode = document.getelementsbytagname("div").item(0); range.setstartbefore(referencenode); specifications specification status comment domthe definition of 'range.setstartbefore()' in that specification.
Range.surroundContents() - Web APIs
Web › API › Range › surroundContents
example html <span class="header-text">put this in a headline</span> javascript const range = document.createrange(); const newparent = document.createelement('h1'); range.selectnode(document.queryselector('.header-text')); range.surroundcontents(newparent); result specifications specification status comment domthe definition of 'range.surroundcontents()' in that specification.
Range.toString() - Web APIs
Web › API › Range › toString
look at the output below.</p> <p id="log"></p> javascript const range = document.createrange(); range.setstartbefore(document.getelementsbytagname('b').item(0), 0); range.setendafter(document.getelementsbytagname('b').item(1), 0); document.getelementbyid('log').textcontent = range.tostring(); result specifications specification status comment domthe definition of 'range.tostring()' in that specification.
Range - Web APIs
Web › API › Range
range.getclientrects() returns a list of domrect objects that aggregates the results of element.getclientrects() for all the elements in the range.
ReadableStream.ReadableStream() - Web APIs
Web › API › ReadableStream › ReadableStream
const stream = new readablestream({ start(controller) { interval = setinterval(() => { let string = randomchars(); // add the string to the stream controller.enqueue(string); // show it on the screen let listitem = document.createelement('li'); listitem.textcontent = string; list1.appendchild(listitem); }, 1000); button.addeventlistener('click', function() { clearinterval(interval); fetchstream(); controller.close(); }) }, pull(controller) { // we don't really need a pull in this example }, cancel() { // this is called if the reader cancels, // so we should stop gener...
ReadableStream.getReader() - Web APIs
Web › API › ReadableStream › getReader
if (done) { console.log("stream complete"); para.textcontent = value; return; } // value for fetch streams is a uint8array charsreceived += value.length; const chunk = value; let listitem = document.createelement('li'); listitem.textcontent = 'received ' + charsreceived + ' characters so far.
ReadableStream - Web APIs
Web › API › ReadableStream
readablestream.tee() the tee method tees this readable stream, returning a two-element array containing the two resulting branches as new readablestream instances.
ReadableStreamDefaultController.close() - Web APIs
Web › API › ReadableStreamDefaultController › close
const stream = new readablestream({ start(controller) { interval = setinterval(() => { let string = randomchars(); // add the string to the stream controller.enqueue(string); // show it on the screen let listitem = document.createelement('li'); listitem.textcontent = string; list1.appendchild(listitem); }, 1000); button.addeventlistener('click', function() { clearinterval(interval); fetchstream(); controller.close(); }) }, pull(controller) { // we don't really need a pull in this example }, cancel() { // this is called if the reader cancels, // so we should stop gener...
ReadableStreamDefaultController.enqueue() - Web APIs
Web › API › ReadableStreamDefaultController › enqueue
const stream = new readablestream({ start(controller) { interval = setinterval(() => { let string = randomchars(); // add the string to the stream controller.enqueue(string); // show it on the screen let listitem = document.createelement('li'); listitem.textcontent = string; list1.appendchild(listitem); }, 1000); button.addeventlistener('click', function() { clearinterval(interval); fetchstream(); controller.close(); }) }, pull(controller) { // we don't really need a pull in this example }, cancel() { // this is called if the reader cancels, // so we should stop gener...
ReadableStreamDefaultController - Web APIs
Web › API › ReadableStreamDefaultController
const stream = new readablestream({ start(controller) { interval = setinterval(() => { let string = randomchars(); // add the string to the stream controller.enqueue(string); // show it on the screen let listitem = document.createelement('li'); listitem.textcontent = string; list1.appendchild(listitem); }, 1000); button.addeventlistener('click', function() { clearinterval(interval); fetchstream(); controller.close(); }) }, pull(controller) { // we don't really need a pull in this example }, cancel() { // this is called if the reader cancels, // so we should stop gener...
ReadableStreamDefaultReader.ReadableStreamDefaultReader() - Web APIs
Web › API › ReadableStreamDefaultReader › ReadableStreamDefaultReader
if (done) { console.log("stream complete"); para.textcontent = result; return; } // value for fetch streams is a uint8array charsreceived += value.length; const chunk = value; let listitem = document.createelement('li'); listitem.textcontent = 'received ' + charsreceived + ' characters so far.
ReadableStreamDefaultReader.cancel() - Web APIs
Web › API › ReadableStreamDefaultReader › cancel
if (done) { console.log("stream complete"); reader.cancel(); para.textcontent = result; return; } // value for fetch streams is a uint8array charsreceived += value.length; const chunk = value; let listitem = document.createelement('li'); listitem.textcontent = 'received ' + charsreceived + ' characters so far.
ReadableStreamDefaultReader.read() - Web APIs
Web › API › ReadableStreamDefaultReader › read
if (done) { console.log("stream complete"); para.textcontent = result; return; } // value for fetch streams is a uint8array charsreceived += value.length; const chunk = value; let listitem = document.createelement('li'); listitem.textcontent = 'received ' + charsreceived + ' characters so far.
Request() - Web APIs
Web › API › Request › Request
since we are fetching an image, we run body.blob on the response to give it the proper mime type so it will be handled properly, then create an object url of it and display it in an <img> element.
Request.destination - Web APIs
Web › API › Request › destination
script-based destinations include <script> elements, as well as any of the worklet-based destinations (including audioworklet and paintworklet), and the worker-based destinations, including serviceworker and sharedworker.
Request.mode - Web APIs
Web › API › Request › mode
however, for requests created other than by the request.request constructor, no-cors is typically used as the mode; for example, for embedded resources where the request is initiated from markup, unless the crossorigin attribute is present, the request is in most cases made using the no-cors mode — that is, for the <link> or <script> elements (except when used with modules), or <img>, <audio>, <video>, <object>, <embed>, or <iframe> elements.
ResizeObserver.disconnect() - Web APIs
Web › API › ResizeObserver › disconnect
the disconnect() method of the resizeobserver interface unobserves all observed element or svgelement targets.
Response.clone() - Web APIs
Web › API › Response › clone
when the fetch resolves successfully, we clone it, extract a blob from both responses using two body.blob calls, create object urls out of the blobs using url.createobjecturl, and display them in two separate <img> elements.
Response - Web APIs
Web › API › Response
examples in our basic fetch example (run example live) we use a simple fetch() call to grab an image and display it in an <img> element.
SVGLength - Web APIs
Web › API › SVGLength
svg_lengthtype_cm = 6 svg_lengthtype_mm = 7 svg_lengthtype_in = 8 svg_lengthtype_pt = 9 svg_lengthtype_pc = 10 normative document svg 1.1 (2nd edition) example <svg height="200" onload="start();" version="1.1" width="200" xmlns="http://www.w3.org/2000/svg"> <script type="text/javascript"><![cdata[ function start() { var rect = document.getelementbyid("myrect"); var val = rect.x.baseval; // read x in pixel and cm units console.log("value: " + val.value + ", valueinspecifiedunits: " + val.unittype + ": " + val.valueinspecifiedunits + ", valueasstring: " + val.valueasstring); // set x = 20pt and read it out in pixel and pt units val.newvaluespecifiedunits(svglength.svg_lengthtype_pt, 20); console.log("v...
SVGPreserveAspectRatio - Web APIs
Web › API › SVGPreserveAspectRatio
svg preserveaspectratio interface the svgpreserveaspectratio interface corresponds to the preserveaspectratio attribute, which is available for some of svg's elements.
SVGZoomAndPan - Web APIs
Web › API › SVGZoomAndPan
the svgzoomandpan interface is used to reflect the zoomandpan attribute, and is mixed in to other interfaces for elements that support this attribute.
Screen.availHeight - Web APIs
Web › API › Screen › availHeight
on a windows system, this would function similarly, by opening the window and sizing it vertically so it uses all available vertical space, leaving room for the taskbar and any other interface elements that reserve space.
ScrollToOptions.left - Web APIs
Web › API › ScrollToOptions › left
the left property of the scrolltooptions dictionary specifies the number of pixels along the x axis to scroll the window or element.
ScrollToOptions.top - Web APIs
Web › API › ScrollToOptions › top
the top property of the scrolltooptions dictionary specifies the number of pixels along the y axis to scroll the window or element.
Selection.addRange() - Web APIs
Web › API › Selection › addRange
html <p>i <strong>insist</strong> that you <strong>try</strong> selecting the <strong>strong words</strong>.</p> <button>select strong words</button> javascript let button = document.queryselector('button'); button.addeventlistener('click', function () { let selection = window.getselection(); let strongs = document.getelementsbytagname('strong'); if (selection.rangecount > 0) { selection.removeallranges(); } for (let i = 0; i < strongs.length; i++) { let range = document.createrange(); range.selectnode(strongs[i]); selection.addrange(range); } }); result specifications specification status comment selection apithe definition of 'selection.addrange()' in that speci...
Selection.collapse() - Web APIs
Web › API › Selection › collapse
*/ var body = document.getelementsbytagname("body")[0]; window.getselection().collapse(body,0); specifications specification status comment selection apithe definition of 'selection.collapse()' in that specification.
Selection.rangeCount - Web APIs
Web › API › Selection › rangeCount
firefox allows to select multiple ranges in the document by using ctrl+click (unless the click within an element with display: table-cell).
Selection.setBaseAndExtent() - Web APIs
Web › API › Selection › setBaseAndExtent
r" value="0"> </p> <p> <label for="foffset">focus offset</label> <input id="foffset" name="foffset" type="number" value="0"> </p> <p><button>capture selection</button></p> </div> <p><strong>output</strong>: <span class="output"></span></p> the javascript looks like so: var one = document.queryselector('.one'); var two = document.queryselector('.two'); var aoffset = document.getelementbyid('aoffset'); var foffset = document.getelementbyid('foffset'); var button = document.queryselector('button'); var output = document.queryselector('.output'); var selection; button.onclick = function() { try { selection = document.getselection(); selection.setbaseandextent(one, aoffset.value, two, foffset.value); var text = selection.tostring(); output.textcontent = text; ...
Sensor APIs - Web APIs
Web › API › Sensor APIs
const sensor = new absoluteorientationsensor(); sensor.start(); sensor.onerror = event => { if (event.error.name === 'securityerror') console.log("no permissions to use absoluteorientationsensor."); }; the following table describes for each sensor type, the name required for the permissions api, the <iframe> element's allow attribute and the feature-policy directive.
ShadowRoot.innerHTML - Web APIs
Web › API › ShadowRoot › innerHTML
examples let customelem = document.queryselector('my-shadow-dom-element'); let shadow = customelem.shadowroot; shadow.innerhtml = '<strong>this element should be more important!</strong>'; specifications this property is not defined by any specifications yet; see this open spec issue to specify it.
Slottable - Web APIs
Web › API › Slottable
the slottable mixin defines features that allow nodes to become the contents of a <slot> element — the following features are included in both element and text.
SourceBuffer - Web APIs
Web › API › SourceBuffer
the sourcebuffer interface represents a chunk of media to be passed into an htmlmediaelement and played, via a mediasource object.
SpeechRecognition - Web APIs
Web › API › SpeechRecognition
after some other values have been defined, we then set it so that the recognition service starts when a click event occurs (see speechrecognition.start().) when a result has been successfully recognised, the speechrecognition.onresult handler fires, we extract the color that was spoken from the event object, and then set the background color of the <html> element to that color.
SpeechSynthesis.getVoices() - Web APIs
Web › API › SpeechSynthesis › getVoices
example javascript function populatevoicelist() { if(typeof speechsynthesis === 'undefined') { return; } var voices = speechsynthesis.getvoices(); for(var i = 0; i < voices.length; i++) { var option = document.createelement('option'); option.textcontent = voices[i].name + ' (' + voices[i].lang + ')'; if(voices[i].default) { option.textcontent += ' -- default'; } option.setattribute('data-lang', voices[i].lang); option.setattribute('data-name', voices[i].name); document.getelementbyid("voiceselect").appendchild(option); } } populatevoicelist(); if (typeof speechsynthesis !== 'undefi...
SpeechSynthesis.onvoiceschanged - Web APIs
Web › API › SpeechSynthesis › onvoiceschanged
var voices = []; function populatevoicelist() { voices = synth.getvoices(); for(i = 0; i < voices.length ; i++) { var option = document.createelement('option'); option.textcontent = voices[i].name + ' (' + voices[i].lang + ')'; if(voices[i].default) { option.textcontent += ' -- default'; } option.setattribute('data-lang', voices[i].lang); option.setattribute('data-name', voices[i].name); voiceselect.appendchild(option); } } populatevoicelist(); if (speechsynthesis.onvoiceschanged !== undefined) { speechsynt...
SpeechSynthesisVoice.default - Web APIs
Web › API › SpeechSynthesisVoice › default
examples for(i = 0; i < voices.length ; i++) { var option = document.createelement('option'); option.textcontent = voices[i].name + ' (' + voices[i].lang + ')'; if(voices[i].default) { option.textcontent += ' -- default'; } option.setattribute('data-lang', voices[i].lang); option.setattribute('data-name', voices[i].name); voiceselect.appendchild(option); } specifications specification status comment web speech apithe definition of 'de...
SpeechSynthesisVoice.lang - Web APIs
Web › API › SpeechSynthesisVoice › lang
examples for(i = 0; i < voices.length ; i++) { var option = document.createelement('option'); option.textcontent = voices[i].name + ' (' + voices[i].lang + ')'; if(voices[i].default) { option.textcontent += ' -- default'; } option.setattribute('data-lang', voices[i].lang); option.setattribute('data-name', voices[i].name); voiceselect.appendchild(option); } specifications specification status comment web speech apithe definition of 'lang' in that specification.
SpeechSynthesisVoice.localService - Web APIs
Web › API › SpeechSynthesisVoice › localService
examples for(i = 0; i < voices.length ; i++) { var option = document.createelement('option'); option.textcontent = voices[i].name + ' (' + voices[i].lang + ')'; if(voices[i].default) { option.textcontent += ' -- default'; } console.log(voices[i].localservice); option.setattribute('data-lang', voices[i].lang); option.setattribute('data-name', voices[i].name); voiceselect.appendchild(option); } specifications specification status comment ...
SpeechSynthesisVoice.name - Web APIs
Web › API › SpeechSynthesisVoice › name
examples for(i = 0; i < voices.length ; i++) { var option = document.createelement('option'); option.textcontent = voices[i].name + ' (' + voices[i].lang + ')'; if(voices[i].default) { option.textcontent += ' -- default'; } option.setattribute('data-lang', voices[i].lang); option.setattribute('data-name', voices[i].name); voiceselect.appendchild(option); } specifications specification status comment web speech apithe definition of 'name' in that specification.
SpeechSynthesisVoice.voiceURI - Web APIs
Web › API › SpeechSynthesisVoice › voiceURI
examples for(i = 0; i < voices.length ; i++) { var option = document.createelement('option'); option.textcontent = voices[i].name + ' (' + voices[i].lang + ')'; if(voices[i].default) { option.textcontent += ' -- default'; } console.log(voices[i].voiceuri); // on mac, this returns urns, for example 'urn:moz-tts:osx:com.apple.speech.synthesis.voice.daniel' option.setattribute('data-lang', voices[i].lang); option.setattribute('data-name', voices[i].name); vo...
SpeechSynthesisVoice - Web APIs
Web › API › SpeechSynthesisVoice
function populatevoicelist() { voices = synth.getvoices(); for(i = 0; i < voices.length ; i++) { var option = document.createelement('option'); option.textcontent = voices[i].name + ' (' + voices[i].lang + ')'; if(voices[i].default) { option.textcontent += ' -- default'; } option.setattribute('data-lang', voices[i].lang); option.setattribute('data-name', voices[i].name); voiceselect.appendchild(option); } } populatevoicelist(); if (speechsynthesis.onvoiceschanged !== undefined) { speechsynt...
StaticRange.StaticRange() - Web APIs
Web › API › StaticRange › StaticRange
those node types are node.document_type_node (representing the documenttype node derived from the dtd identified using the doctype preamble in the html, for example) and the attr node describing an attribute of an element on the dom..
StaticRange - Web APIs
Web › API › StaticRange
usage notes a dom range specifies a span of content in a document, potentially beginning inside one node (or element) and ending inside another one.
Storage.getItem() - Web APIs
Web › API › Storage › getItem
function setstyles() { var currentcolor = localstorage.getitem('bgcolor'); var currentfont = localstorage.getitem('font'); var currentimage = localstorage.getitem('image'); document.getelementbyid('bgcolor').value = currentcolor; document.getelementbyid('font').value = currentfont; document.getelementbyid('image').value = currentimage; htmlelem.style.backgroundcolor = '#' + currentcolor; pelem.style.fontfamily = currentfont; imgelem.setattribute('src', currentimage); } note: to see this used within a real world example, see our web storage demo.
StorageEstimate.quota - Web APIs
Web › API › StorageEstimate › quota
</label> javascript content navigator.storage.estimate().then(function(estimate) { document.getelementbyid("percent").value = (estimate.usage / estimate.quota * 100).tofixed(2); }); result specifications specification status comment storagethe definition of 'quota' in that specification.
StorageEstimate.usage - Web APIs
Web › API › StorageEstimate › usage
</label> javascript content navigator.storage.estimate().then(function(estimate) { document.getelementbyid("percent").value = (estimate.usage / estimate.quota * 100).tofixed(2); }); result specifications specification status comment storagethe definition of 'usage' in that specification.
StorageManager.estimate() - Web APIs
Web › API › StorageManager › estimate
</label> javascript content navigator.storage.estimate().then(function(estimate) { document.getelementbyid("percent").value = (estimate.usage / estimate.quota * 100).tofixed(2); }); result specifications specification status comment storagethe definition of 'estimate()' in that specification.
Storage Access API - Web APIs
Web › API › Storage Access API
extensions to <iframe> sandbox the <iframe> element's sandbox attribute has a new token, allow-storage-access-by-user-activation, which permits sandboxed <iframe>s to use the storage access api to request storage access.
Using writable streams - Web APIs
Web › API › Streams API › Using writable streams
y = new countqueuingstrategy({ highwatermark: 1 }); let result = ""; const writablestream = new writablestream({ // implement the sink write(chunk) { return new promise((resolve, reject) => { var buffer = new arraybuffer(2); var view = new uint16array(buffer); view[0] = chunk; var decoded = decoder.decode(view, { stream: true }); var listitem = document.createelement('li'); listitem.textcontent = "chunk decoded: " + decoded; list.appendchild(listitem); result += decoded; resolve(); }); }, close() { var listitem = document.createelement('li'); listitem.textcontent = "[message received] " + result; list.appendchild(listitem); }, abort(err) { console.log("sink error:", err); } }, queuingstrategy); the writ...
SubtleCrypto.generateKey() - Web APIs
Web › API › SubtleCrypto › generateKey
possible values for array elements are: encrypt: the key may be used to encrypt messages.
Text.splitText() - Web APIs
Web › API › Text › splitText
html <p>foobar</p> javascript const p = document.queryselector('p'); // get contents of <p> as a text node const foobar = p.firstchild; // split 'foobar' into two text nodes, 'foo' and 'bar', // and save 'bar' as a const const bar = foobar.splittext(3); // create a <u> element containing ' new content ' const u = document.createelement('u'); u.appendchild(document.createtextnode(' new content ')); // add <u> before 'bar' p.insertbefore(u, bar); // the result is: <p>foo<u> new content </u>bar</p> result specifications specification status comment domthe definition of 'text.splittext' in that specification.
TextDecoder.prototype.decode() - Web APIs
Web › API › TextDecoder › decode
html <p>encoded value: <span id="encoded-value"></span></p> <p>decoded value: <span id="decoded-value"></span></p> javascript const encoder = new textencoder(); const array = encoder.encode('€'); // uint8array(3) [226, 130, 172] document.getelementbyid('encoded-value').textcontent = array; const decoder = new textdecoder(); const str = decoder.decode(array); // string "€" document.getelementbyid('decoded-value').textcontent = str; result specifications specification status comment encodingthe definition of 'textdecoder.decode()' in that specification.
TextMetrics.actualBoundingBoxAscent - Web APIs
Web › API › TextMetrics › actualBoundingBoxAscent
examples const canvas = document.createelement('canvas'); const ctx = canvas.getcontext('2d'); const text = ctx.measuretext('foo'); // returns textmetrics object text.actualboundingboxascent; // 8; specifications specification html living standardthe definition of 'textmetrics.actualboundingboxascent' in that specification.
TextMetrics.actualBoundingBoxDescent - Web APIs
Web › API › TextMetrics › actualBoundingBoxDescent
examples const canvas = document.createelement('canvas'); const ctx = canvas.getcontext('2d'); const text = ctx.measuretext('foo'); // returns textmetrics object text.actualboundingboxdescent; // 0; specifications specification html living standardthe definition of 'textmetrics.actualboundingboxdescent' in that specification.
TextMetrics.actualBoundingBoxLeft - Web APIs
Web › API › TextMetrics › actualBoundingBoxLeft
examples const canvas = document.createelement('canvas'); const ctx = canvas.getcontext('2d'); const text = ctx.measuretext('foo'); // returns textmetrics object text.actualboundingboxleft; // 0; specifications specification html living standardthe definition of 'textmetrics.actualboundingboxleft' in that specification.
TextMetrics.actualBoundingBoxRight - Web APIs
Web › API › TextMetrics › actualBoundingBoxRight
examples const canvas = document.createelement('canvas'); const ctx = canvas.getcontext('2d'); const text = ctx.measuretext('foo'); // returns textmetrics object text.actualboundingboxright; // 15.633333333333333; specifications specification html living standardthe definition of 'textmetrics.actualboundingboxright' in that specification.
TextMetrics.alphabeticBaseline - Web APIs
Web › API › TextMetrics › alphabeticBaseline
examples const canvas = document.createelement('canvas'); const ctx = canvas.getcontext('2d'); const text = ctx.measuretext('foo'); // returns textmetrics object text.alphabeticbaseline; // -0; specifications specification html living standardthe definition of 'textmetrics.alphabeticbaseline' in that specification.
TextMetrics.emHeightAscent - Web APIs
Web › API › TextMetrics › emHeightAscent
examples const canvas = document.createelement('canvas'); const ctx = canvas.getcontext('2d'); const text = ctx.measuretext('foo'); // returns textmetrics object text.emheightascent; // 7.59765625; specifications specification html living standardthe definition of 'textmetrics.emheightascent' in that specification.
TextMetrics.emHeightDescent - Web APIs
Web › API › TextMetrics › emHeightDescent
examples const canvas = document.createelement('canvas'); const ctx = canvas.getcontext('2d'); const text = ctx.measuretext('foo'); // returns textmetrics object text.emheightdescent; // -2.40234375; specifications specification html living standardthe definition of 'textmetrics.emheightdescent' in that specification.
TextMetrics.fontBoundingBoxAscent - Web APIs
Web › API › TextMetrics › fontBoundingBoxAscent
examples const canvas = document.createelement('canvas'); const ctx = canvas.getcontext('2d'); const text = ctx.measuretext('foo'); // returns textmetrics object text.fontboundingboxascent; // 10; specifications specification html living standardthe definition of 'textmetrics.fontboundingboxascent' in that specification.
TextMetrics.fontBoundingBoxDescent - Web APIs
Web › API › TextMetrics › fontBoundingBoxDescent
examples const canvas = document.createelement('canvas'); const ctx = canvas.getcontext('2d'); const text = ctx.measuretext('foo'); // returns textmetrics object text.fontboundingboxdescent; // 3; specifications specification html living standardthe definition of 'textmetrics.fontboundingboxdescent' in that specification.
TextMetrics.hangingBaseline - Web APIs
Web › API › TextMetrics › hangingBaseline
examples const canvas = document.createelement('canvas'); const ctx = canvas.getcontext('2d'); const text = ctx.measuretext('foo'); // returns textmetrics object text.hangingbaseline; // 6.078125; specifications specification html living standardthe definition of 'textmetrics.hangingbaseline' in that specification.
TextMetrics.ideographicBaseline - Web APIs
Web › API › TextMetrics › ideographicBaseline
examples const canvas = document.createelement('canvas'); const ctx = canvas.getcontext('2d'); const text = ctx.measuretext('foo'); // returns textmetrics object text.ideographicbaseline; // -1.201171875; specifications specification html living standardthe definition of 'textmetrics.ideographicbaseline' in that specification.
TextTrackList: addtrack event - Web APIs
Web › API › TextTrackList › addtrack event
bubbles no cancelable no interface trackevent event handler property onaddtrack examples using addeventlistener(): const mediaelement = document.queryselector('video, audio'); mediaelement.texttracks.addeventlistener('addtrack', (event) => { console.log(`text track: ${event.track.label} added`); }); using the onaddtrack event handler property: const mediaelement = document.queryselector('video, audio'); mediaelement.texttracks.onaddtrack = (event) => { console.log(`text track: ${event.track.label} added`); }; specifications specification status html living standardthe definition of 'addtrack' in that specification.
TextTrackList: change event - Web APIs
Web › API › TextTrackList › change event
bubbles no cancelable no interface event event handler property onchange examples using addeventlistener(): const mediaelement = document.queryselectorall('video, audio')[0]; mediaelement.texttracks.addeventlistener('change', (event) => { console.log(`'${event.type}' event fired`); }); using the onchange event handler property: const mediaelement = document.queryselector('video, audio'); mediaelement.texttracks.onchange = (event) => { console.log(`'${event.type}' event fired`); }; specifications specification status html living standardthe definition of 'change' in that specification.
TextTrackList: removeTrack event - Web APIs
Web › API › TextTrackList › removeTrack event
bubbles no cancelable no interface trackevent event handler property onremovetrack examples using addeventlistener(): const mediaelement = document.queryselector('video, audio'); mediaelement.texttracks.addeventlistener('removetrack', (event) => { console.log(`text track: ${event.track.label} removed`); }); using the onremovetrack event handler property: const mediaelement = document.queryselector('video, audio'); mediaelement.texttracks.onremovetrack = (event) => { console.log(`text track: ${event.track.label} removed`); }; specifications specification status html living standardthe definition of 'removetrack' in that specification...
TimeRanges.end() - Web APIs
Web › API › TimeRanges › end
example given a video element with the id "myvideo": var v = document.getelementbyid("myvideo"); var buf = v.buffered; var numranges = buf.length; if (buf.length == 1) { // only one range if (buf.start(0) == 0 && buf.end(0) == v.duration) { // the one range starts at the beginning and ends at // the end of the video, so the whole thing is loaded } } this example looks at the time ranges and looks to see if the entire video has been loaded.
TimeRanges.length - Web APIs
Web › API › TimeRanges › length
syntax length = timeranges.length; example given a video element with the id "myvideo": var v = document.getelementbyid("myvideo"); var buf = v.buffered; var numranges = buf.length; if (buf.length == 1) { // only one range if (buf.start(0) == 0 && buf.end(0) == v.duration) { // the one range starts at the beginning and ends at // the end of the video, so the whole thing is loaded } } this example looks at the time ranges and looks to see if the entire video has been loaded.
TimeRanges.start() - Web APIs
Web › API › TimeRanges › start
example given a video element with the id "myvideo": var v = document.getelementbyid("myvideo"); var buf = v.buffered; var numranges = buf.length; if (buf.length == 1) { // only one range if (buf.start(0) == 0 && buf.end(0) == v.duration) { // the one range starts at the beginning and ends at // the end of the video, so the whole thing is loaded } } this example looks at the time ranges and looks to see if the entire video has been loaded.
TimeRanges - Web APIs
Web › API › TimeRanges
the timeranges interface is used to represent a set of time ranges, primarily for the purpose of tracking which portions of media have been buffered when loading it for use by the <audio> and <video> elements.
Touch.force - Web APIs
Web › API › Touch › force
someelement.addeventlistener('touchstart', function(e) { // iterate through the list of touch points and log each touch // point's force.
Touch.identifier - Web APIs
Web › API › Touch › identifier
example someelement.addeventlistener('touchmove', function(e) { // iterate through the list of touch points that changed // since the last event and print each touch point's identifier.
Touch - Web APIs
Web › API › Touch
touch.target read only returns the element on which the touch point started when it was first placed on the surface, even if the touch point has since moved outside the interactive area of that element or even been removed from the document.
TouchEvent() - Web APIs
Web › API › TouchEvent › TouchEvent
"targettouches", optional and defaulting to [], of type touch[], that is a list of objects for every point of contact that is touching the surface and started on the element that is the target of the current event.
TouchEvent.altKey - Web APIs
Web › API › TouchEvent › altKey
someelement.addeventlistener('touchstart', function(e) { // log the state of this event's modifier keys console.log("altkey = " + e.altkey); console.log("ctrlkey = " + e.ctrlkey); console.log("metakey = " + e.metakey); console.log("shiftkey = " + e.shiftkey); }, false); specifications specification status comment touch events – level 2 draft non-stable versi...
TouchEvent.changedTouches - Web APIs
Web › API › TouchEvent › changedTouches
someelement.addeventlistener('touchmove', function(e) { // iterate through the list of touch points that changed // since the last event and print each touch point's identifier.
TouchList.item() - Web APIs
Web › API › TouchList › item
target = document.getelementbyid("target"); target.addeventlistener('touchstart', function(ev) { // if this touchstart event started on element target, // set touch to the first item in the targettouches list; // otherwise set touch to the first item in the touches list var touch; if (ev.targettouches.length >= 1) touch = ev.targettouches.item(0); else touch = ev.touches.item(0); }, false); specif...
TouchList.length - Web APIs
Web › API › TouchList › length
target = document.getelementbyid("target"); target.addeventlistener('touchstart', function(ev) { // if this touchstart event started on element target, // set touch to the first item in the targettouches list; // otherwise set touch to the first item in the touches list var touch; if (ev.targettouches.length >= 1) touch = ev.targettouches.item(0); else touch = ev.touches.item(0); }, false); specifications specification status comme...
Supporting both TouchEvent and MouseEvent - Web APIs
Web › API › Touch events › Supporting both TouchEvent and MouseEvent
consequently, if an application does not want mouse events fired on a specific touch target element, the element's touch event handlers should call preventdefault() and no additional mouse events will be dispatched.
TreeWalker.currentNode - Web APIs
Web › API › TreeWalker › currentNode
syntax node = treewalker.currentnode; treewalker.currentnode = node; example var treewalker = document.createtreewalker( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); root = treewalker.currentnode; // the root element as it is the first element!
TreeWalker.expandEntityReferences - Web APIs
Web › API › TreeWalker › expandEntityReferences
syntax expand = treewalker.expandentityreferences; example var treewalker = document.createtreewalker( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); expand = treewalker.expandentityreferences; specifications document object model (dom) level 2 traversal and range specificationthe definition of 'treewalker.expandentityreferences' in that specification.
TreeWalker.filter - Web APIs
Web › API › TreeWalker › filter
syntax nodefilter = treewalker.filter; example var treewalker = document.createtreewalker( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); nodefilter = treewalker.filter; // document.body in this case specifications specification status comment domthe definition of 'treewalker.filter' in that specification.
TreeWalker.firstChild() - Web APIs
Web › API › TreeWalker › firstChild
syntax node = treewalker.firstchild; example var treewalker = document.createtreewalker( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); var node = treewalker.firstchild(); // returns the first child of the root element, or null if none specifications specification status comment domthe definition of 'treewalker.firstchild' in that specification.
TreeWalker.lastChild() - Web APIs
Web › API › TreeWalker › lastChild
syntax node = treewalker.lastchild(); example var treewalker = document.createtreewalker( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); var node = treewalker.lastchild(); // returns the last visible child of the root element specifications specification status comment domthe definition of 'treewalker.lastchild' in that specification.
TreeWalker.nextNode() - Web APIs
Web › API › TreeWalker › nextNode
syntax node = treewalker.nextnode(); example var treewalker = document.createtreewalker( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); var node = treewalker.nextnode(); // returns the first child of root, as it is the next node in document order specifications specification status comment domthe definition of 'treewalker.nextnode' in that specification.
TreeWalker.nextSibling() - Web APIs
Web › API › TreeWalker › nextSibling
syntax node = treewalker.nextsibling(); example var treewalker = document.createtreewalker( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); treewalker.firstchild(); var node = treewalker.nextsibling(); // returns null if the first child of the root element has no sibling specifications specification status comment domthe definition of 'treewalker.nextsibling' in that specification.
TreeWalker.parentNode() - Web APIs
Web › API › TreeWalker › parentNode
syntax node = treewalker.parentnode(); example var treewalker = document.createtreewalker( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); var node = treewalker.parentnode(); // returns null as there is no parent specifications specification status comment domthe definition of 'treewalker.parentnode' in that specification.
TreeWalker.previousNode() - Web APIs
Web › API › TreeWalker › previousNode
syntax node = treewalker.previousnode(); example var treewalker = document.createtreewalker( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); var node = treewalker.previousnode(); // returns null as there is no parent specifications specification status comment domthe definition of 'treewalker.previousnode' in that specification.
TreeWalker.previousSibling() - Web APIs
Web › API › TreeWalker › previousSibling
syntax node = treewalker.previoussibling(); example var treewalker = document.createtreewalker( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); var node = treewalker.previoussibling(); // returns null as there is no previous sibiling specifications specification status comment domthe definition of 'treewalker.previoussibling' in that specification.
TreeWalker.root - Web APIs
Web › API › TreeWalker › root
syntax root = treewalker.root; example var treewalker = document.createtreewalker( document.body, nodefilter.show_element, { acceptnode: function(node) { return nodefilter.filter_accept; } }, false ); root = treewalker.root; // document.body in this case specifications specification status comment domthe definition of 'treewalker.root' in that specification.
TreeWalker - Web APIs
Web › API › TreeWalker
nodefilter.show_element 1 shows element nodes.
VTTCue - Web APIs
Web › API › VTTCue
the vttcue interface—part of the api for handling webvtt (text tracks on media presentations)—describes and controls the text track associated with a particular <track> element.
validityState.tooLong - Web APIs
Web › API › ValidityState › tooLong
the read-only toolong property of a validitystate object indicates if the value of an <input> or <textarea>, after having been edited by the user, exceeds the maximum code-unit length established by the element's maxlength attribute.
validityState.tooShort - Web APIs
Web › API › ValidityState › tooShort
the read-only tooshort property of a validitystate object indicates if the value of an <input>, <button>, <select>, <output>, <fieldset> or <textarea>, after having been edited by the user, is less than the minimum code-unit length established by the element's minlength attribute.
ValidityState.typeMismatch - Web APIs
Web › API › ValidityState › typeMismatch
the read-only typemismatch property of a validitystate object indicates if the value of an <input>, after having been edited by the user, does not conform to the constraints set by the element's type attribute.
VideoPlaybackQuality.creationTime - Web APIs
Web › API › VideoPlaybackQuality › creationTime
var videoelem = document.getelementbyid("my_vid"); var quality = videoelem.getvideoplaybackquality(); if ((quality.corruptedvideoframes + quality.droppedvideoframes)/quality.totalvideoframes > 0.1) { lostframesthresholdexceeded(); } specifications specification status comment media playback qualitythe definition of 'videoplaybackquality.corruptedvideoframes' in that specification.
VideoTrack.label - Web APIs
Web › API › VideoTrack › label
example this example returns an array of track kinds and labels for potential use in a user interface to select video tracks for a specified media element.
VideoTrackList: addtrack event - Web APIs
Web › API › VideoTrackList › addtrack event
bubbles no cancelable no interface trackevent event handler property onaddtrack examples using addeventlistener(): const videoelement = document.queryselector('video'); videoelement.videotracks.addeventlistener('addtrack', (event) => { console.log(`video track: ${event.track.label} added`); }); using the onaddtrack event handler property: const videoelement = document.queryselector('video'); videoelement.videotracks.onaddtrack = (event) => { console.log(`video track: ${event.track.label} added`); }; specifications specification status html living standardthe definition of 'addtrack' in that specification.
VideoTrackList.onchange - Web APIs
Web › API › VideoTrackList › onchange
var tracklist = document.queryselector("video").videotracks; tracklist.onchange = function(event) { tracklist.foreach(function(track) { updatetrackselectedbutton(track.id, track.selected); }); }; the updatetrackselectedbutton(), in this example, should be a function that finds a user interface control using the track's id (perhaps the app uses the track id as the control element's id) and the track's selected flag to determine which state the control should be in now.
VideoTrackList: removetrack event - Web APIs
Web › API › VideoTrackList › removetrack event
bubbles no cancelable no interface trackevent event handler property onremovetrack examples using addeventlistener(): const videoelement = document.queryselector('video'); videoelement.videotracks.addeventlistener('removetrack', (event) => { console.log(`video track: ${event.track.label} removed`); }); using the onremovetrack event handler property: const videoelement = document.queryselector('video'); videoelement.videotracks.onremovetrack = (event) => { console.log(`video track: ${event.track.label} removed`); }; specifications specification status html living standardthe definition of 'removetrack' in that specification.
WEBGL_compressed_texture_astc.getSupportedProfiles() - Web APIs
Web › API › WEBGL compressed texture astc › getSupportedProfiles
syntax sequence<domstring> ext.getsupportedprofiles(); return value an array of domstring elements indicating which astc profiles are supported by the implementation.
WEBGL_debug_renderer_info - Web APIs
Web › API › WEBGL debug renderer info
examples with the help of this extension, privileged contexts are able to retrieve debugging information about about the user's graphic driver: var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var debuginfo = gl.getextension('webgl_debug_renderer_info'); var vendor = gl.getparameter(debuginfo.unmasked_vendor_webgl); var renderer = gl.getparameter(debuginfo.unmasked_renderer_webgl); console.log(vendor); console.log(renderer); specifications specification status comment webgl_debug_renderer_infothe definitio...
WEBGL_debug_shaders.getTranslatedShaderSource() - Web APIs
Web › API › WEBGL debug shaders › getTranslatedShaderSource
examples var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var shader = gl.createshader(gl.fragment_shader); gl.shadersource(shader, 'void main() { gl_fragcolor = vec4(gl_fragcoord.x, 0.0, 0.0, 1.0); }'); gl.compileshader(shader); var src = gl.getextension('webgl_debug_shaders').gettranslatedshadersource(shader); console.log(src); // "void main(){ // (gl_fragcolor = vec4(gl_fragcoord.x, 0.0, 0.0, 1.0)...
WEBGL_lose_context.loseContext() - Web APIs
Web › API › WEBGL lose context › loseContext
syntax gl.getextension('webgl_lose_context').losecontext(); examples with this method, you can simulate the webglcontextlost event: var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); canvas.addeventlistener('webglcontextlost', function(e) { console.log(e); }, false); gl.getextension('webgl_lose_context').losecontext(); // webglcontextevent event with type "webglcontextlost" is logged.
WEBGL_lose_context.restoreContext() - Web APIs
Web › API › WEBGL lose context › restoreContext
examples with this method, you can simulate the webglcontextrestored event: var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); canvas.addeventlistener('webglcontextrestored', function(e) { console.log(e); }, false); gl.getextension('webgl_lose_context').restorecontext(); specifications specification status comment webgl_lose_contextthe definition of 'webgl_lose_context.losecontext' in that specification.
WEBGL_lose_context - Web APIs
Web › API › WEBGL lose context
examples with this extension, you can simulate the webglcontextlost and webglcontextrestored events: const canvas = document.getelementbyid('canvas'); const gl = canvas.getcontext('webgl'); canvas.addeventlistener('webglcontextlost', (event) => { console.log(event); }); gl.getextension('webgl_lose_context').losecontext(); // webglcontextevent event with type "webglcontextlost" is logged.
WaveShaperNode.curve - Web APIs
Web › API › WaveShaperNode › curve
the mid-element of the array is applied to any signal value of 0, the first one to signal values of -1, and the last to signal values of 1; values lower than -1 or greater than 1 are treated like -1 or 1 respectively.
WebGL2RenderingContext.copyBufferSubData() - Web APIs
Web › API › WebGL2RenderingContext › copyBufferSubData
gl.element_array_buffer: buffer used for element indices.
WebGL2RenderingContext.getActiveUniforms() - Web APIs
Web › API › WebGL2RenderingContext › getActiveUniforms
gl.uniform_array_stride: returns an array of glint indicating the strides between the elements.
WebGL2RenderingContext.vertexAttribDivisor() - Web APIs
Web › API › WebGL2RenderingContext › vertexAttribDivisor
the webgl2renderingcontext.vertexattribdivisor() method of the webgl 2 api modifies the rate at which generic vertex attributes advance when rendering multiple instances of primitives with gl.drawarraysinstanced() and gl.drawelementsinstanced().
WebGLBuffer - Web APIs
Web › API › WebGLBuffer
when working with webglbuffer objects, the following methods of the webglrenderingcontext are useful: webglrenderingcontext.bindbuffer() webglrenderingcontext.createbuffer() webglrenderingcontext.deletebuffer() webglrenderingcontext.isbuffer() examples creating a buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var buffer = gl.createbuffer(); specifications specification status comment webgl 1.0the definition of 'webglbuffer' in that specification.
WebGLContextEvent.statusMessage - Web APIs
Web › API › WebGLContextEvent › statusMessage
var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); canvas.addeventlistener('webglcontextcreationerror', function(e) { console.log('webgl context creation failed:' + e.statusmessage || 'unknown error'); }, false); specifications specification status comment webgl 1.0the definition of 'webglcontextevent.statusmessage' in that specification.
WebGLContextEvent - Web APIs
Web › API › WebGLContextEvent
examples with the help of the webgl_lose_context extension, you can simulate the webglcontextlost and webglcontextrestored events: var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); canvas.addeventlistener('webglcontextlost', function(e) { console.log(e); }, false); gl.getextension('webgl_lose_context').losecontext(); // webglcontextevent event with type "webglcontextlost" is logged.
WebGLFramebuffer - Web APIs
Web › API › WebGLFramebuffer
when working with webglframebuffer objects, the following methods of the webglrenderingcontext are useful: webglrenderingcontext.bindframebuffer() webglrenderingcontext.createframebuffer() webglrenderingcontext.deleteframebuffer() webglrenderingcontext.isframebuffer() examples creating a frame buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var buffer = gl.createframebuffer(); specifications specification status comment webgl 1.0the definition of 'webglframebuffer' in that specification.
WebGLRenderbuffer - Web APIs
Web › API › WebGLRenderbuffer
when working with webglrenderbuffer objects, the following methods of the webglrenderingcontext are useful: webglrenderingcontext.bindrenderbuffer() webglrenderingcontext.createrenderbuffer() webglrenderingcontext.deleterenderbuffer() webglrenderingcontext.isrenderbuffer() examples creating a render buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var buffer = gl.createrenderbuffer(); specifications specification status comment webgl 1.0the definition of 'webglrenderbuffer' in that specification.
WebGLRenderingContext.bindFramebuffer() - Web APIs
Web › API › WebGLRenderingContext › bindFramebuffer
examples binding a frame buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var framebuffer = gl.createframebuffer(); gl.bindframebuffer(gl.framebuffer, framebuffer); getting current bindings to check the current frame buffer binding, query the framebuffer_binding constant.
WebGLRenderingContext.bindRenderbuffer() - Web APIs
Web › API › WebGLRenderingContext › bindRenderbuffer
examples binding a renderbuffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var renderbuffer = gl.createrenderbuffer(); gl.bindrenderbuffer(gl.renderbuffer, renderbuffer); getting current bindings to check the current renderbuffer binding, query the renderbuffer_binding constant.
WebGLRenderingContext.bindTexture() - Web APIs
Web › API › WebGLRenderingContext › bindTexture
examples binding a texture var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var texture = gl.createtexture(); gl.bindtexture(gl.texture_2d, texture); getting current bindings to check the current texture binding, query the gl.texture_binding_2d or gl.texture_binding_cube_map constants.
WebGLRenderingContext.checkFramebufferStatus() - Web APIs
Web › API › WebGLRenderingContext › checkFramebufferStatus
examples var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var framebuffer = gl.createframebuffer(); // ...
WebGLRenderingContext.createBuffer() - Web APIs
Web › API › WebGLRenderingContext › createBuffer
examples creating a buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var buffer = gl.createbuffer(); specifications specification status comment webgl 1.0the definition of 'createbuffer' in that specification.
WebGLRenderingContext.createFramebuffer() - Web APIs
Web › API › WebGLRenderingContext › createFramebuffer
examples creating a frame buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var framebuffer = gl.createframebuffer(); specifications specification status comment webgl 1.0the definition of 'createframebuffer' in that specification.
WebGLRenderingContext.createRenderbuffer() - Web APIs
Web › API › WebGLRenderingContext › createRenderbuffer
examples creating a render buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var renderbuffer = gl.createrenderbuffer(); specifications specification status comment webgl 1.0the definition of 'createrenderbuffer' in that specification.
WebGLRenderingContext.createTexture() - Web APIs
Web › API › WebGLRenderingContext › createTexture
creating a texture var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var texture = gl.createtexture(); specifications specification status comment webgl 1.0the definition of 'createtexture' in that specification.
WebGLRenderingContext.deleteBuffer() - Web APIs
Web › API › WebGLRenderingContext › deleteBuffer
examples deleting a buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var buffer = gl.createbuffer(); // ...
WebGLRenderingContext.deleteFramebuffer() - Web APIs
Web › API › WebGLRenderingContext › deleteFramebuffer
examples deleting a frame buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var framebuffer = gl.createframebuffer(); // ...
WebGLRenderingContext.deleteProgram() - Web APIs
Web › API › WebGLRenderingContext › deleteProgram
examples deleting a program var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var program = gl.createprogram(); // ...
WebGLRenderingContext.deleteRenderbuffer() - Web APIs
Web › API › WebGLRenderingContext › deleteRenderbuffer
examples deleting a renderbuffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var renderbuffer = gl.createrenderbuffer(); // ...
WebGLRenderingContext.deleteTexture() - Web APIs
Web › API › WebGLRenderingContext › deleteTexture
examples deleting a texture var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var texture = gl.createtexture(); // ...
WebGLRenderingContext.getBufferParameter() - Web APIs
Web › API › WebGLRenderingContext › getBufferParameter
gl.element_array_buffer: buffer used for element indices.
WebGLRenderingContext.getShaderPrecisionFormat() - Web APIs
Web › API › WebGLRenderingContext › getShaderPrecisionFormat
var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); gl.getshaderprecisionformat(gl.vertex_shader, gl.medium_float); // webglshaderprecisionformat { rangemin: 127, rangemax: 127, precision: 23 } specifications specification status comment webgl 1.0the definition of 'getshaderprecisionformat' in that specification.
WebGLRenderingContext.isBuffer() - Web APIs
Web › API › WebGLRenderingContext › isBuffer
examples creating a buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var buffer = gl.createbuffer(); gl.isbuffer(buffer); specifications specification status comment webgl 1.0the definition of 'isbuffer' in that specification.
WebGLRenderingContext.isFramebuffer() - Web APIs
Web › API › WebGLRenderingContext › isFramebuffer
examples checking a frame buffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var framebuffer = gl.createframebuffer(); gl.isframebuffer(framebuffer); specifications specification status comment webgl 1.0the definition of 'isframebuffer' in that specification.
WebGLRenderingContext.isProgram() - Web APIs
Web › API › WebGLRenderingContext › isProgram
examples checking a program var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var program = gl.createprogram(); // ...
WebGLRenderingContext.isRenderbuffer() - Web APIs
Web › API › WebGLRenderingContext › isRenderbuffer
examples checking a renderbuffer var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var renderbuffer = gl.createrenderbuffer(); gl.isrenderbuffer(renderbuffer); specifications specification status comment webgl 1.0the definition of 'isrenderbuffer' in that specification.
WebGLRenderingContext.isShader() - Web APIs
Web › API › WebGLRenderingContext › isShader
examples checking a shader var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var shader = gl.createshader(gl.vertex_shader); // ...
WebGLRenderingContext.isTexture() - Web APIs
Web › API › WebGLRenderingContext › isTexture
examples checking a texture var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var texture = gl.createtexture(); gl.istexture(texture); specifications specification status comment webgl 1.0the definition of 'istexture' in that specification.
WebGLRenderingContext.readPixels() - Web APIs
Web › API › WebGLRenderingContext › readPixels
examples var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var pixels = new uint8array(gl.drawingbufferwidth * gl.drawingbufferheight * 4); gl.readpixels(0, 0, gl.drawingbufferwidth, gl.drawingbufferheight, gl.rgba, gl.unsigned_byte, pixels); console.log(pixels); // uint8array specifications specification status comment webgl 1.0the definition of 'readpixels' in that specifica...
WebGLShaderPrecisionFormat.precision - Web APIs
Web › API › WebGLShaderPrecisionFormat › precision
examples var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); gl.getshaderprecisionformat(gl.vertex_shader, gl.medium_float).precision; // 23 gl.getshaderprecisionformat(gl.fragment_shader, gl.low_int).precision; // 0 specifications specification status comment webgl 1.0the definition of 'webglshaderprecisionformat.precision' in that specification.
WebGLShaderPrecisionFormat.rangeMax - Web APIs
Web › API › WebGLShaderPrecisionFormat › rangeMax
examples var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); gl.getshaderprecisionformat(gl.vertex_shader, gl.medium_float).rangemax; // 127 gl.getshaderprecisionformat(gl.fragment_shader, gl.low_int).rangemax; // 24 specifications specification status comment webgl 1.0the definition of 'webglshaderprecisionformat.rangemax' in that specification.
WebGLShaderPrecisionFormat.rangeMin - Web APIs
Web › API › WebGLShaderPrecisionFormat › rangeMin
examples var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); gl.getshaderprecisionformat(gl.vertex_shader, gl.medium_float).rangemin; // 127 gl.getshaderprecisionformat(gl.fragment_shader, gl.low_int).rangemin; // 24 specifications specification status comment webgl 1.0the definition of 'webglshaderprecisionformat.rangemin' in that specification.
WebGLShaderPrecisionFormat - Web APIs
Web › API › WebGLShaderPrecisionFormat
var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); gl.getshaderprecisionformat(gl.vertex_shader, gl.medium_float); // webglshaderprecisionformat { rangemin: 127, rangemax: 127, precision: 23 } specifications specification status comment webgl 1.0the definition of 'webglshaderprecisionformat' in that specification.
WebGLTexture - Web APIs
Web › API › WebGLTexture
when working with webgltexture objects, the following methods of the webglrenderingcontext are useful: webglrenderingcontext.bindtexture() webglrenderingcontext.createtexture() webglrenderingcontext.deletetexture() webglrenderingcontext.istexture() examples creating a texture var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var texture = gl.createtexture(); specifications specification status comment webgl 1.0the definition of 'webgltexture' in that specification.
WebGLUniformLocation - Web APIs
Web › API › WebGLUniformLocation
when working with webgluniformlocation objects, the following methods of the webglrenderingcontext are useful: webglrenderingcontext.getuniformlocation() webglrenderingcontext.uniform() examples getting an uniform location var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); var location = gl.getuniformlocation(webglprogram, 'uniformname'); specifications specification status comment webgl 1.0the definition of 'webgluniformlocation' in that specification.
Simple color animation - Web APIs
Web › API › WebGL API › By example › Simple color animation
stopanimation({type: "click"}); var gl; function drawanimation () { if (!gl) { var canvas = document.getelementbyid("canvas-view"); gl = canvas.getcontext("webgl") ||canvas.getcontext("experimental-webgl"); if (!gl) { clearinterval(timer); alert("failed to get webgl context.\n" + "your browser or device may not support webgl."); return; } gl.viewport(0, 0, gl.drawingbufferwidth, gl.drawingbufferheight); } // get a random col...
WebGL by example - Web APIs
Web › API › WebGL API › By example
canvas size and webgl the example explores the effect of setting (or not setting) the canvas size to its element size in css pixels, as it appears in the browser window.
Matrix math for the web - Web APIs
Web › API › WebGL API › Matrix math for the web
// create the matrix3d style property from a matrix array function matrixarraytocssmatrix(array) { return 'matrix3d(' + array.join(',') + ')'; } // grab the dom element let moveme = document.getelementbyid('move-me'); // returns a result like: "matrix3d(1, 0, 0, 0, 0, 1, 0, 0, 0, 0, 1, 0, 50, 100, 0, 1);" let matrix3drule = matrixarraytocssmatrix(translationmatrix); // set the transform moveme.style.transform = matrix3drule; view on jsfiddle scale matrix a scale matrix makes something larger or smaller in one or more of the three dimensions: width, heigh...
Getting started with WebGL - Web APIs
Web › API › WebGL API › Tutorial › Getting started with WebGL
webgl elements can be mixed with other html elements and composited with other parts of the page or page background.
Using WebGL extensions - Web APIs
Web › API › WebGL API › Using Extensions
extension list the current extensions are: angle_instanced_arrays ext_blend_minmax ext_color_buffer_float ext_color_buffer_half_float ext_disjoint_timer_query ext_float_blend ext_frag_depth ext_srgb ext_shader_texture_lod ext_texture_compression_bptc ext_texture_compression_rgtc ext_texture_filter_anisotropic khr_parallel_shader_compile oes_element_index_uint oes_fbo_render_mipmap oes_standard_derivatives oes_texture_float oes_texture_float_linear oes_texture_half_float oes_texture_half_float_linear oes_vertex_array_object ovr_multiview2 webgl_color_buffer_float webgl_compressed_texture_astc webgl_compressed_texture_atc webgl_compressed_texture_etc webgl_compressed_texture_etc1 webgl_compressed_texture_pvrtc webgl_compressed_...
Introduction to the Real-time Transport Protocol (RTP) - Web APIs
Web › API › WebRTC API › Intro to RTP
one possibility is to have a hidden <audio> element and use htmlaudioelement.capturestream() to get its audio stream.
Lifetime of a WebRTC session - Web APIs
Web › API › WebRTC API › Session lifetime
this code should connect the tracks to its consumer, such as a <video> element.
WebRTC API - Web APIs
Web › API › WebRTC API
media capture from dom elements working draft the initial definition on how to obtain stream of content from dom elements in additions to these specifications defining the api needed to use webrtc, there are several protocols, listed under resources.
Geometry and reference spaces in WebXR - Web APIs
Web › API › WebXR Device API › Geometry
a space will typically have foreground, mid-distance, and background elements.
Lighting a WebXR setting - Web APIs
Web › API › WebXR Device API › Lighting
the color of each pixel in the final, rendered, scene is calculated using some intricate math that factors in things like: the color of the texture element (the pixel within the texture mapped onto the object; also known as a texel) corresponding to the screen pixel, given the object geometry, the viewer position and orientation relative to each polygon, and so forth.
Rendering and the WebXR frame animation callback - Web APIs
Web › API › WebXR Device API › Rendering
in this context, "repaint" simply means the process of ensuring that the screen's displayed content matches what the dom and the elements within are trying to present at the moment.
Spaces and reference spaces: Spatial tracking in WebXR - Web APIs
Web › API › WebXR Device API › Spatial tracking
other hardware elements can be used similarly to represent other parts of the body, providing additional data to use when simulating the user's actions in their environment.
Starting up and shutting down a WebXR session - Web APIs
Web › API › WebXR Device API › Startup and shutdown
obtain a webgl context for the canvas into which you intend to render your frames by calling the htmlcanvaselement method getcontext() on the target context.
Basic concepts behind Web Audio API - Web APIs
Web › API › Web Audio API › Basic concepts behind Web Audio API
taken from html media elements (such as <video> or <audio>).
Using IIR filters - Web APIs
Web › API › Web Audio API › Using IIR filters
// create a canvas element and append it to our dom const canvascontainer = document.queryselector('.filter-graph'); const canvasel = document.createelement('canvas'); canvascontainer.appendchild(canvasel); // set 2d context and set dimesions const canvasctx = canvasel.getcontext('2d'); const width = canvascontainer.offsetwidth; const height = canvascontainer.offsetheight; canvasel.width = width; canvasel.height = height;...
Web audio spatialization basics - Web APIs
Web › API › Web Audio API › Web audio spatialization basics
first, we'll get references to the elements we want to move, then we'll store references to the values we'll change when we set up css transforms to actually do the movement.
Web Bluetooth API - Web APIs
Web › API › Web Bluetooth API
bluetoothremotegattcharacteristic represents a gatt characteristic, which is a basic data element that provides further information about a peripheral’s service.
Functions and classes available to Web Workers - Web APIs
Web › API › Web Workers API › Functions and classes available to workers
imagedata the underlying pixel data of an area of a canvas element.
Window.clearImmediate() - Web APIs
Web › API › Window › clearImmediate
examples let immediateid = setimmediate(() => { // run some code } document.getelementbyid("button") .addeventlistener(() => { clearimmediate(immediateid); }); specifications specification status comment efficient script yielding the definition of 'setimmediate' in that specification.
Window.close() - Web APIs
Web › API › Window › close
note also that close() has no effect when called on window objects returned by htmliframe​element​.content​window.
Window.content - Web APIs
Web › API › Window › content
syntax var windowobject = window.content; example executing the following code in a chrome xul window with a <browser type="content-primary"/> element in it draws a red border around the first div on the page currently displayed in the browser: content.document.getelementsbytagname("div")[0].style.border = "solid red 1px"; specification none.
Window.crypto - Web APIs
Web › API › Window › crypto
javascript genrandomnumbers = function getrandomnumbers() { var array = new uint32array(10); window.crypto.getrandomvalues(array); var randtext = document.getelementbyid("myrandtext"); randtext.innerhtml = "the random numbers are: " for (var i = 0; i < array.length; i++) { randtext.innerhtml += array[i] + " "; } } html <p id="myrandtext">the random numbers are: </p> <button type="button" onclick='genrandomnumbers()'>generate 10 random numbers</button> result specifications specification status comment web cryptography ...
Window: error event - Web APIs
Web › API › Window › error event
bubbles no cancelable no interface event or uievent event handler property onerror the event object is a uievent instance if it was generated from a user interface element, or an event instance otherwise.
Window.frames - Web APIs
Web › API › Window › frames
each item in the window.frames pseudo-array represents the window object corresponding to the given <frame>'s or <iframe>'s content, not the (i)frame dom element (i.e., window.frames[0] is the same thing as document.getelementsbytagname("iframe")[0].contentwindow).
Window.innerHeight - Web APIs
Web › API › Window › innerHeight
usage notes to obtain the height of the window minus its horizontal scroll bar and any borders, use the root <html> element's clientheight() property instead.
Window.innerWidth - Web APIs
Web › API › Window › innerWidth
usage notes if you need to obtain the width of the window minus the scrollbar and borders, use the root <html> element's clientwidth property instead.
Window.length - Web APIs
Web › API › Window › length
returns the number of frames (either <frame> or <iframe> elements) in the window.
Window: load event - Web APIs
Web › API › Window › load event
'load' events are fired at many elements too.
Privileged features - Web APIs
Web › API › Window › open › Privileged features
chrome if on, the page is loaded as window's only content, without any of the browser's interface elements.
Window.opener - Web APIs
Web › API › Window › opener
in modern browsers, a rel="noopener noreferrer" attribute on the originating <a> element will prevent the window.opener reference from being set, in which case this property will return null.
Window.parent - Web APIs
Web › API › Window › parent
when a window is loaded in an <iframe>, <object>, or <frame>, its parent is the window with the element embedding the window.
window.postMessage() - Web APIs
Web › API › Window › postMessage
methods for obtaining such a reference include: window.open (to spawn a new window and then reference it), window.opener (to reference the window that spawned this one), htmliframeelement.contentwindow (to reference an embedded <iframe> from its parent window), window.parent (to reference the parent window from within an embedded <iframe>), or window.frames + an index value (named or numeric).
Window.scroll() - Web APIs
Web › API › Window › scroll
for scrolling elements, see element.scrolltop and element.scrollleft.
Window.scrollTo() - Web APIs
Web › API › Window › scrollTo
for scrolling elements, see element.scrolltop and element.scrollleft.
Window.sessionStorage - Web APIs
Web › API › Window › sessionStorage
// get the text field that we're going to track let field = document.getelementbyid("field"); // see if we have an autosave value // (this will only happen if the page is accidentally refreshed) if (sessionstorage.getitem("autosave")) { // restore the contents of the text field field.value = sessionstorage.getitem("autosave"); } // listen for changes in the text field field.addeventlistener("change", function() { // and save the results into the session storage objec...
WindowEventHandlers.onhashchange - Web APIs
Web › API › WindowEventHandlers › onhashchange
the hashchange event fires when a window's hash changes (see window.location and htmlhyperlinkelementutils.hash).
WindowEventHandlers.onlanguagechange - Web APIs
Web › API › WindowEventHandlers › onlanguagechange
these events are received by the object implementing this interface, usually a window, an htmlbodyelement, or an htmliframeelement.
WindowEventHandlers - Web APIs
Web › API › WindowEventHandlers
the windoweventhandlers mixin describes the event handlers common to several interfaces like window, or htmlbodyelement and htmlframesetelement.
WindowOrWorkerGlobalScope.fetch() - Web APIs
Web › API › WindowOrWorkerGlobalScope › fetch
since we are fetching an image, we run body.blob() on the response to give it the proper mime type so it will be handled properly, then create an object url of it and display it in an <img> element.
WindowOrWorkerGlobalScope.queueMicrotask() - Web APIs
Web › API › WindowOrWorkerGlobalScope › queueMicrotask
examples self.queuemicrotask(() => { // function contents here }) taken from the queuemicrotask spec: myelement.prototype.loaddata = function (url) { if (this._cache[url]) { queuemicrotask(() => { this._setdata(this._cache[url]); this.dispatchevent(new event("load")); }); } else { fetch(url).then(res => res.arraybuffer()).then(data => { this._cache[url] = data; this._setdata(data); this.dispatchevent(new event("load")); }); } }; when queuemicrotask() isn...
Worklet - Web APIs
Web › API › Worklet
compositor thread css animation worklet api layoutworklet for defining the positioning and dimensions of custom elements.
WritableStream.WritableStream() - Web APIs
Web › API › WritableStream › WritableStream
y = new countqueuingstrategy({ highwatermark: 1 }); let result = ""; const writablestream = new writablestream({ // implement the sink write(chunk) { return new promise((resolve, reject) => { var buffer = new arraybuffer(2); var view = new uint16array(buffer); view[0] = chunk; var decoded = decoder.decode(view, { stream: true }); var listitem = document.createelement('li'); listitem.textcontent = "chunk decoded: " + decoded; list.appendchild(listitem); result += decoded; resolve(); }); }, close() { var listitem = document.createelement('li'); listitem.textcontent = "[message received] " + result; list.appendchild(listitem); }, abort(err) { console.log("sink error:", err); } }, queuingstrategy); sendmessag...
WritableStream.getWriter() - Web APIs
Web › API › WritableStream › getWriter
y = new countqueuingstrategy({ highwatermark: 1 }); let result = ""; const writablestream = new writablestream({ // implement the sink write(chunk) { return new promise((resolve, reject) => { var buffer = new arraybuffer(2); var view = new uint16array(buffer); view[0] = chunk; var decoded = decoder.decode(view, { stream: true }); var listitem = document.createelement('li'); listitem.textcontent = "chunk decoded: " + decoded; list.appendchild(listitem); result += decoded; resolve(); }); }, close() { var listitem = document.createelement('li'); listitem.textcontent = "[message received] " + result; list.appendchild(listitem); }, abort(err) { console.log("sink error:", err); } }, queuingstrategy); sendmessag...
WritableStream - Web APIs
Web › API › WritableStream
y = new countqueuingstrategy({ highwatermark: 1 }); let result = ""; const writablestream = new writablestream({ // implement the sink write(chunk) { return new promise((resolve, reject) => { var buffer = new arraybuffer(2); var view = new uint16array(buffer); view[0] = chunk; var decoded = decoder.decode(view, { stream: true }); var listitem = document.createelement('li'); listitem.textcontent = "chunk decoded: " + decoded; list.appendchild(listitem); result += decoded; resolve(); }); }, close() { var listitem = document.createelement('li'); listitem.textcontent = "[message received] " + result; list.appendchild(listitem); }, abort(err) { console.log("sink error:", err); } }, queuingstrategy); sendmessag...
WritableStreamDefaultWriter.WritableStreamDefaultWriter() - Web APIs
Web › API › WritableStreamDefaultWriter › WritableStreamDefaultWriter
y = new countqueuingstrategy({ highwatermark: 1 }); let result = ""; const writablestream = new writablestream({ // implement the sink write(chunk) { return new promise((resolve, reject) => { var buffer = new arraybuffer(2); var view = new uint16array(buffer); view[0] = chunk; var decoded = decoder.decode(view, { stream: true }); var listitem = document.createelement('li'); listitem.textcontent = "chunk decoded: " + decoded; list.appendchild(listitem); result += decoded; resolve(); }); }, close() { var listitem = document.createelement('li'); listitem.textcontent = "[message received] " + result; list.appendchild(listitem); }, abort(err) { console.log("sink error:", err); } }, queuingstrategy); sendmessag...
WritableStreamDefaultWriter.close() - Web APIs
Web › API › WritableStreamDefaultWriter › close
y = new countqueuingstrategy({ highwatermark: 1 }); let result = ""; const writablestream = new writablestream({ // implement the sink write(chunk) { return new promise((resolve, reject) => { var buffer = new arraybuffer(2); var view = new uint16array(buffer); view[0] = chunk; var decoded = decoder.decode(view, { stream: true }); var listitem = document.createelement('li'); listitem.textcontent = "chunk decoded: " + decoded; list.appendchild(listitem); result += decoded; resolve(); }); }, close() { var listitem = document.createelement('li'); listitem.textcontent = "[message received] " + result; list.appendchild(listitem); }, abort(err) { console.log("sink error:", err); } }, queuingstrategy); sendmessag...
WritableStreamDefaultWriter.write() - Web APIs
Web › API › WritableStreamDefaultWriter › write
y = new countqueuingstrategy({ highwatermark: 1 }); let result = ""; const writablestream = new writablestream({ // implement the sink write(chunk) { return new promise((resolve, reject) => { var buffer = new arraybuffer(2); var view = new uint16array(buffer); view[0] = chunk; var decoded = decoder.decode(view, { stream: true }); var listitem = document.createelement('li'); listitem.textcontent = "chunk decoded: " + decoded; list.appendchild(listitem); result += decoded; resolve(); }); }, close() { var listitem = document.createelement('li'); listitem.textcontent = "[message received] " + result; list.appendchild(listitem); }, abort(err) { console.log("sink error:", err); } }, queuingstrategy); sendmessag...
WritableStreamDefaultWriter - Web APIs
Web › API › WritableStreamDefaultWriter
untqueuingstrategy({ highwatermark: 1 }); let result = ""; const writablestream = new writablestream({ // implement the sink write(chunk) { return new promise((resolve, reject) => { var buffer = new arraybuffer(2); var view = new uint16array(buffer); view[0] = chunk; var decoded = decoder.decode(view, { stream: true }); var listitem = document.createelement('li'); listitem.textcontent = "chunk decoded: " + decoded; list.appendchild(listitem); result += decoded; resolve(); }); }, close() { var listitem = document.createelement('li'); listitem.textcontent = "[message received] " + result; list.appendchild(listitem); }, abort(err) { console.log("sink error:", err); } }, queuingstrateg...
XPathResult.singleNodeValue - Web APIs
Web › API › XPathResult › singleNodeValue
html <div>xpath example</div> <div>tag name of the element having the text content 'xpath example': <output></output></div> javascript var xpath = "//*[text()='xpath example']"; var result = document.evaluate(xpath, document, null, xpathresult.first_ordered_node_type, null); document.queryselector("output").textcontent = result.singlenodevalue.localname; result specifications specification status comment document object m...
XRInputSourceArray.forEach() - Web APIs
Web › API › XRInputSourceArray › forEach
currentindex optional an integer value providing the index into the array at which the element given by currentvalue is located.
XRPermissionDescriptor.mode - Web APIs
Web › API › XRPermissionDescriptor › mode
inline the output is presented inline within the context of an element in a standard html document, rather than occupying the full visual space.
XRRigidTransform.matrix - Web APIs
Web › API › XRRigidTransform › matrix
usage notes matrix format all 4x4 transform matrices used in webgl are stored in 16-element float32arrays.
XRSession.end() - Web APIs
Web › API › XRSession › end
you can use the promise to do things like update ui elements to reflect the shut down connection, trigger application shut down, or whatever else you might need to do.
XRSession.requestAnimationFrame() - Web APIs
Web › API › XRSession › requestAnimationFrame
example the following example requests xrsession with "inline" mode so that it can be displayed in an html element (without the need for a separate ar or vr device).
XRSession.updateRenderState() - Web APIs
Web › API › XRSession › updateRenderState
function onxrsessionstarted(xrsession) { let glcanvas = document.createelement("canvas"); let gl = glcanvas.getcontext("webgl", { xrcompatible: true }); loadwebglresources(); xrsession.updaterenderstate({ baselayer: new xrwebgllayer(xrsession, gl) }); } specifications specification status comment webxr device apithe definition of 'xrsession.updaterenderstate()' in that specification.
XRSession - Web APIs
Web › API › XRSession
example this example establishes a new xrsession in inline mode so that it can be displayed within an html element, avoiding the need for a dedicated ar or vr viewing device such as a headset.
XRSessionMode - Web APIs
Web › API › XRSessionMode
inline the output is presented inline within the context of an element in a standard html document, rather than occupying the full visual space.
XRSystem: devicechange event - Web APIs
Web › API › XRSystem › devicechange event
you can use this event to, for example, monitor for the availability of a webxr-compatible device so that you can enable a ui element which the user can use to activate immersive mode.
XRSystem: requestSession() - Web APIs
Web › API › XRSystem › requestSession
inline the output is presented inline within the context of an element in a standard html document, rather than occupying the full visual space.
XSLT Basic Example - Web APIs
Web › API › XSLTProcessor › Basic Example
an xslt stylesheet starts with the xsl:stylesheet element, which contains all the templates used to create the final output.
msCapsLockWarningOff - Web APIs
Web › API › msCapsLockWarningOff
example fiddle: http://jsfiddle.net/jonathansampson/mqcha/1/ example 2 <html> <head> <title>mscapslockwarningoff example</title> <script type="text/javascript"> function capsoff() { if (document.mscapslockwarningoff == false) { document.mscapslockwarningoff = true; document.getelementbyid("caps").innerhtml = "warning off"; } else { document.mscapslockwarningoff = false; document.getelementbyid("caps").innerhtml = "warning on"; } } </script> </head> <body> <label>type a password: <input type="password" /></label><br /> <button id="caps" onclick="capsoff();">warning off</button> </body> </html> ...
Using the aria-relevant attribute - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the aria-relevant attribute
values a space-delimited list of one or more of the following values: additions element nodes added to the accessibility tree within the live region; should be considered relevant.
Using the slider role - Accessibility
Web › Accessibility › ARIA › ARIA Techniques › Using the slider role
aluemin="1" aria-valuemax="7" aria-valuenow="2" aria-valuetext="monday"> </div> </div> the code snippet below shows a function that responds to user input and updates the aria-valuenow and aria-valuetext attributes: var daynames = ["sunday", "monday", "tuesday", "wednesday", "thursday", "friday", "saturday"]; var updateslider = function (newvalue) { var handle = document.getelementbyid("day-handle"); handle.setattribute("aria-valuenow", newvalue.tostring()); handle.setattribute("aria-valuetext", daynames[newvalue]); }; working examples: slider example notes aria attributes used aria-valuemin aria-valuemax aria-valuenow aria-valuetext aria-orientation related aria techniques compatibility tbd: add support information for common ua and at pr...
ARIA: Comment role - Accessibility
Web › Accessibility › ARIA › Roles › Comment role
end of the guitar solo</span>, before fading away sharply.</p> <div role="comment" id="thread-1" data-author="chris"> <h3>chris said</h3> <p class="comment-text">i really think this moment could use more cowbell.</p> <p><time datetime="2019-03-30t19:29">march 30 2019, 19:29</time></p> </div> to associate the comment with the text being commented, we need to wrap the commented text with an element containing the aria-details attribute, the value of which should be the id of the comment.
Accessibility and Spacial Patterns - Accessibility
Web › Accessibility › Accessibility and Spacial Patterns
they can be parallel, radial, curved or straight, and may be formed by rows of repeating elements.
Architecture - Accessibility
Web › Accessibility › Architecture
they support the nsiaccessiblehypertext is implemented on any container element that has both text and embedded objects for accessible children.
Implementing a Microsoft Active Accessibility (MSAA) Server - Accessibility
Web › Accessibility › Implementing MSAA server
msaa is by no means perfect, but it is the only thing that will make your custom ui elements work with most assistive technologies.
Accessibility Information for Web Authors - Accessibility
Web › Accessibility › Information for Web authors
how-to's key-navigable custom dhtml widgets in mozilla & ie this document discusses how to use tabindex, element.focus() and onkeypress to make custom dhtml widgets such as menus or tree views keyboard accessible.
Web accessibility for seizures and physical reactions - Accessibility
Web › Accessibility › Seizure disorders
a <div> element set to change color and luminosity at high frequency, easily done via javascript, can cause real harm.
Robust - Accessibility
Web › Accessibility › Understanding WCAG › Robust
when using semantic elements correctly for their intended purpose, this criterion should be passed automatically.
Understanding the Web Content Accessibility Guidelines - Accessibility
Web › Accessibility › Understanding WCAG
operable: users must be able to control ui elements (e.g.
Accessibility
Web › Accessibility
html: a good basis for accessibility a great deal of web content can be made accessible just by making sure the correct html elements are used for the correct purpose at all times.
-webkit-overflow-scrolling - CSS: Cascading Style Sheets
Web › CSS › -webkit-overflow-scrolling
the -webkit-overflow-scrolling css property controls whether or not touch devices use momentum-based scrolling for a given element.
-webkit-print-color-adjust - CSS: Cascading Style Sheets
Web › CSS › -webkit-print-color-adjust
exact background colors and images of the element to which this rule is applied are always printed, user's print settings are overridden.
-webkit-text-stroke-color - CSS: Cascading Style Sheets
Web › CSS › -webkit-text-stroke-color
formal definition initial valuecurrentcolorapplies toall elementsinheritedyescomputed valuecomputed coloranimation typea color formal syntax <color>where <color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>where <rgb()> = rgb( <percentage>{3} [ / <alpha-value> ]?
-webkit-text-stroke-width - CSS: Cascading Style Sheets
Web › CSS › -webkit-text-stroke-width
formal definition initial value0applies toall elementsinheritedyescomputed valueabsolute <length>animation typediscrete formal syntax <length> examples varying stroke widths css p { margin: 0; font-size: 4em; -webkit-text-stroke-color: red; } #thin { -webkit-text-stroke-width: thin; } #medium { -webkit-text-stroke-width: 3px; } #thick { -webkit-text-stroke-width: 1.5mm; } html <p id="thin">thin stroke</p> <p id="medium">mediu...
-webkit-text-stroke - CSS: Cascading Style Sheets
Web › CSS › -webkit-text-stroke
formal definition initial valueas each of the properties of the shorthand:-webkit-text-stroke-width: 0-webkit-text-stroke-color: currentcolorapplies toall elementsinheritedyescomputed valueas each of the properties of the shorthand:-webkit-text-stroke-width: absolute <length>-webkit-text-stroke-color: computed coloranimation typeas each of the properties of the shorthand:-webkit-text-stroke-width: discrete-webkit-text-stroke-color: a color formal syntax <length> | <color>where <color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color...
-webkit-touch-callout - CSS: Cascading Style Sheets
Web › CSS › -webkit-touch-callout
formal definition initial valuedefaultapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax default | none examples turn off touch callout .example { -webkit-touch-callout: none; } specifications not part of any standard.
:-moz-broken - CSS: Cascading Style Sheets
Web › CSS › :-moz-broken
the :-moz-broken css pseudo-class is a mozilla extension that matches elements representing broken image links.
:-moz-drag-over - CSS: Cascading Style Sheets
Web › CSS › :-moz-drag-over
the :-moz-drag-over css pseudo-class is a mozilla extension that matches an element when a dragover event is called on it.
:-moz-handler-blocked - CSS: Cascading Style Sheets
Web › CSS › :-moz-handler-blocked
the :-moz-handler-blocked css pseudo-class is a mozilla extension that matches elements that can't be displayed because their handlers have been blocked.
:-moz-handler-crashed - CSS: Cascading Style Sheets
Web › CSS › :-moz-handler-crashed
the :-moz-handler-crashed css pseudo-class is a mozilla extension that matches elements that can't be displayed because the plugin responsible for drawing them has crashed.
:-moz-handler-disabled - CSS: Cascading Style Sheets
Web › CSS › :-moz-handler-disabled
the :-moz-handler-disabled css pseudo-class is a mozilla extension that matches elements that can't be displayed because their handlers have been disabled by the user.
::-moz-list-bullet - CSS: Cascading Style Sheets
Web › CSS › :-moz-list-bullet
the ::-moz-list-bullet css pseudo-element is a mozilla extension that represents the marker (typically a bullet) of a list item (<li>) in an unordered list (<ul>).
::-moz-list-number - CSS: Cascading Style Sheets
Web › CSS › :-moz-list-number
the ::-moz-list-number css pseudo-element is a mozilla extension that represents the marker (typically a number) of a list item (<li>) in an ordered list (<ol>).
:-moz-loading - CSS: Cascading Style Sheets
Web › CSS › :-moz-loading
the :-moz-loading css pseudo-class is a mozilla extension that matches elements that can't be displayed because they have not started loading, such as images that haven't started to arrive yet.
:-moz-locale-dir(ltr) - CSS: Cascading Style Sheets
Web › CSS › :-moz-locale-dir(ltr)
the :-moz-locale-dir(ltr) css pseudo-class is a mozilla extension that matches an element if the user interface is being displayed left-to-right.
:-moz-locale-dir(rtl) - CSS: Cascading Style Sheets
Web › CSS › :-moz-locale-dir(rtl)
the :-moz-locale-dir(rtl) css pseudo-class is a mozilla extension that matches an element if the user interface is being displayed right-to-left.
:-moz-window-inactive - CSS: Cascading Style Sheets
Web › CSS › :-moz-window-inactive
the :-moz-window-inactive css pseudo-class is a mozilla extension that matches any element while it's in an inactive window.
:-webkit-autofill - CSS: Cascading Style Sheets
Web › CSS › :-webkit-autofill
the :-webkit-autofill css pseudo-class matches when an <input> element has its value autofilled by the browser.
::-moz-color-swatch - CSS: Cascading Style Sheets
Web › CSS › ::-moz-color-swatch
the ::-moz-color-swatch css pseudo-element is a mozilla extension that represents the color selected in an <input> of type="color".
::-moz-focus-inner - CSS: Cascading Style Sheets
Web › CSS › ::-moz-focus-inner
the ::-moz-focus-inner css pseudo-element is a mozilla extension that represents an inner focus ring of the <button> element as well as the button, submit, reset, and color types of the <input> element.
::-moz-page-sequence - CSS: Cascading Style Sheets
Web › CSS › ::-moz-page-sequence
the ::-moz-page-sequence css pseudo-element is a mozilla extension that represents the background of a print preview.
::-moz-page - CSS: Cascading Style Sheets
Web › CSS › ::-moz-page
the ::-moz-page css pseudo-element is a mozilla extension that represents an individual page when printed or in a print preview.
::-moz-progress-bar - CSS: Cascading Style Sheets
Web › CSS › ::-moz-progress-bar
the ::-moz-progress-bar css pseudo-element is a mozilla extension that represents the progress bar inside a <progress> element.
::-moz-range-progress - CSS: Cascading Style Sheets
Web › CSS › ::-moz-range-progress
the ::-moz-range-progress css pseudo-element is a mozilla extension that represents the lower portion of the track (i.e., groove) in which the indicator slides in an <input> of type="range".
::-moz-range-thumb - CSS: Cascading Style Sheets
Web › CSS › ::-moz-range-thumb
the ::-moz-range-thumb css pseudo-element is a mozilla extension that represents the thumb (i.e., virtual knob) of an <input> of type="range".
::-moz-range-track - CSS: Cascading Style Sheets
Web › CSS › ::-moz-range-track
the ::-moz-range-track css pseudo-element is a mozilla extension that represents the track (i.e., groove) in which the indicator slides in an <input> of type="range".
::-moz-scrolled-page-sequence - CSS: Cascading Style Sheets
Web › CSS › ::-moz-scrolled-page-sequence
the ::-moz-scrolled-page-sequence css pseudo-element is a mozilla extension that represents the background of a print preview.
::-webkit-inner-spin-button - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-inner-spin-button
the ::-webkit-inner-spin-button css pseudo-element is used to style the inner part of the spinner button of number picker input elements.
::-webkit-meter-bar - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-meter-bar
the ::-webkit-meter-bar css pseudo-class is a webkit extension that represents the meter bar in a <meter> element.
::-webkit-meter-even-less-good-value - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-meter-even-less-good-value
the ::-webkit-meter-even-less-good-value gives a red color to a <meter> element when the value and the optimum attributes fall outside the low-high range, but in opposite zones.
::-webkit-meter-optimum-value - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-meter-optimum-value
the ::-webkit-meter-optimum-value css pseudo-element styles the <meter> element when its value is inside the low-high range.
::-webkit-meter-suboptimum-value - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-meter-suboptimum-value
the ::-webkit-meter-suboptimum-value pseudo-element gives a yellow color to the <meter> element when the value attribute falls outside of the low-high range.
::-webkit-slider-runnable-track - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-slider-runnable-track
the ::-webkit-slider-runnable-track css pseudo-element represents the "track" (the groove in which the indicator slides) of an <input type="range">.
::-webkit-slider-thumb - CSS: Cascading Style Sheets
Web › CSS › ::-webkit-slider-thumb
the ::-webkit-slider-thumb css pseudo-element represents the "thumb" that the user can move within the "groove" of an <input> of type="range" to alter its numerical value.
:blank - CSS: Cascading Style Sheets
Web › CSS › :blank
the :blank css pseudo-class selects empty user input elements (eg.
:first - CSS: Cascading Style Sheets
Web › CSS › :first
(see :first-child for general first element of a node.) /* selects the first page when printing */ @page :first { margin-left: 50%; margin-top: 50%; } note: you can't change all css properties with this pseudo-class.
:optional - CSS: Cascading Style Sheets
Web › CSS › :optional
the :optional css pseudo-class represents any <input>, <select>, or <textarea> element that does not have the required attribute set on it.
:required - CSS: Cascading Style Sheets
Web › CSS › :required
the :required css pseudo-class represents any <input>, <select>, or <textarea> element that has the required attribute set on it.
:valid - CSS: Cascading Style Sheets
Web › CSS › :valid
the :valid css pseudo-class represents any <input> or other <form> element whose contents validate successfully.
color - CSS: Cascading Style Sheets
Web › CSS › @media › color
see applying color to html elements using css to learn more about using css to apply color to html.
height - CSS: Cascading Style Sheets
Web › CSS › @media › height
examples html <div>watch this element as you resize your viewport's height.</div> css /* exact height */ @media (height: 360px) { div { color: red; } } /* minimum height */ @media (min-height: 25rem) { div { background: yellow; } } /* maximum height */ @media (max-height: 40rem) { div { border: 2px solid blue; } } result specifications specification status comment media qu...
overflow-block - CSS: Cascading Style Sheets
Web › CSS › @media › overflow-block
proin elementum et massa et feugiat.
overflow-inline - CSS: Cascading Style Sheets
Web › CSS › @media › overflow-inline
proin elementum et massa et feugiat.
prefers-color-scheme - CSS: Cascading Style Sheets
Web › CSS › @media › prefers-color-scheme
examples the elements below have an initial color theme.
prefers-reduced-transparency - CSS: Cascading Style Sheets
Web › CSS › @media › prefers-reduced-transparency
the prefers-reduced-transparency css media feature is used to detect if the user has requested that the system minimize the amount of transparency used across elements.
width - CSS: Cascading Style Sheets
Web › CSS › @media › width
examples html <div>watch this element as you resize your viewport's width.</div> css /* exact width */ @media (width: 360px) { div { color: red; } } /* minimum width */ @media (min-width: 35rem) { div { background: yellow; } } /* maximum width */ @media (max-width: 50rem) { div { border: 2px solid blue; } } result specifications specification status comment media queries level 4the def...
Using multiple backgrounds - CSS: Cascading Style Sheets
Web › CSS › CSS Backgrounds and Borders › Using multiple backgrounds
you can apply multiple backgrounds to elements.
CSS Color - CSS: Cascading Style Sheets
Web › CSS › CSS Color
reference properties color color-adjust opacity data types <color> guides applying color to html elements using css a guide to using css to apply color to a variety of types of content.
CSS Counter Styles - CSS: Cascading Style Sheets
Web › CSS › CSS Counter Styles
reference properties counter-increment counter-reset at-rules @counter-style system additive-symbols negative prefix suffix range pad speak-as fallback guides using css counters describes how to use counters to number any html element or to perform complex counting.
CSS Display - CSS: Cascading Style Sheets
Web › CSS › CSS Display
css display is a module of css that defines how the css formatting box tree is generated from the document element tree and defines properties controlling it.
Aligning Items in a Flex Container - CSS: Cascading Style Sheets
Web › CSS › CSS Flexible Box Layout › Aligning Items in a Flex Container
change the size of the container or nested element and the nested element always remains centered.
Controlling Ratios of Flex Items Along the Main Axis - CSS: Cascading Style Sheets
Web › CSS › CSS Flexible Box Layout › Controlling Ratios of Flex Items Along the Main Ax
in the live example below for instance i have two paragraph elements that contain a string of text.
Mastering Wrapping of Flex Items - CSS: Cascading Style Sheets
Web › CSS › CSS Flexible Box Layout › Mastering Wrapping of Flex Items
any border on the flex container is then moved to a second wrapper in order that the negative margin can pull the items up to that wrapper element.
OpenType font features guide - CSS: Cascading Style Sheets
Web › CSS › CSS Fonts › OpenType fonts guide
this is one of the key benefits over using the <sub> or sup elements.
Variable fonts guide - CSS: Cascading Style Sheets
Web › CSS › CSS Fonts › Variable Fonts Guide
the term 'grade' refers to the relative weight or density of the typeface design, but differs from traditional 'weight' in that the physical space the text occupies does not change, so changing the text grade doesn't change the overall layout of the text or elements around it.
CSS Fragmentation - CSS: Cascading Style Sheets
Web › CSS › CSS Fragmentation
each piece of the rendering for the element is called a fragment.
Auto-placement in CSS Grid Layout - CSS: Cascading Style Sheets
Web › CSS › CSS Grid Layout › Auto-placement in CSS Grid Layout
these are created if you have a string of text inside your grid container, that is not wrapped in any other element.
Box alignment in CSS Grid Layout - CSS: Cascading Style Sheets
Web › CSS › CSS Grid Layout › Box Alignment in CSS Grid Layout
if we update align-content to space-between, you can see how the elements on our grid space out: * {box-sizing: border-box;} .wrapper { border: 2px solid #f76707; border-radius: 5px; background-color: #fff4e6; } .wrapper > div { border: 2px solid #ffa94d; border-radius: 5px; background-color: #ffd8a8; padding: 1em; color: #d9480f; } .wrapper { display: grid; grid-template-columns: repeat(3, 100px); grid-template-rows: repe...
CSS grids, logical values, and writing modes - CSS: Cascading Style Sheets
Web › CSS › CSS Grid Layout › CSS Grid, Logical Values and Writing Modes
i have added dir="rtl" to the html element, which switches the writing mode from the default for an english language document of ltr.
Line-based placement with CSS Grid - CSS: Cascading Style Sheets
Web › CSS › CSS Grid Layout › Line-based Placement with CSS Grid
inside our grid container i have four child elements.
Implementing image sprites in CSS - CSS: Cascading Style Sheets
Web › CSS › CSS Images › Implementing image sprites in CSS
for example: #btn1 { background-position: -20px 0px; } #btn2 { background-position: -40px 0px; } this would move the element with the id 'btn1' 20 pixels to the left and the element with the id 'btn2' 40 pixels to the left (assuming they have the class toolbtn assigned and are affected by the image rule above).
CSS Images - CSS: Cascading Style Sheets
Web › CSS › CSS Images
reference properties image-orientation image-rendering image-resolution object-fit object-position functions linear-gradient() radial-gradient() repeating-linear-gradient() repeating-radial-gradient() conic-gradient() repeating-conic-gradient() url() element() image() cross-fade() data types <gradient> <image> guides using css gradients presents a specific type of css images, gradients, and how to create and use these.
Logical properties for floating and positioning - CSS: Cascading Style Sheets
Web › CSS › CSS Logical Properties › Floating and positioning
example: inset properties for positioned layout positioning generally allows us to position an element in a manner relative to its containing block — we essentially inset the item relative to where it would fall based on normal flow.
Logical properties for sizing - CSS: Cascading Style Sheets
Web › CSS › CSS Logical Properties › Sizing
in this guide we will explain the flow-relative mappings between physical dimension properties and logical properties used for sizing elements on our pages.
CSS Masking - CSS: Cascading Style Sheets
Web › CSS › CSS Masking
css masking is a css module that defines means, including masking and clipping, for partially or fully hiding portions of visual elements.
CSS Motion Path - CSS: Cascading Style Sheets
Web › CSS › CSS Motion Path
the idea is that when you want to animate an element moving along a path, you previously only had animating translation, position, etc.
CSS Positioned Layout - CSS: Cascading Style Sheets
Web › CSS › CSS Positioning
css positioned layout is a module of css that defines how to position elements on the page.
Column combinator - CSS: Cascading Style Sheets
Web › CSS › Column combinator
it matches only those elements matched by the second selector that belong to the column elements matched by the first.
Comments - CSS: Cascading Style Sheets
Web › CSS › Comments
however, when using the <style> element, you may use <!-- --> to hide css from older browsers, although this is not recommended.
Compositing and Blending - CSS: Cascading Style Sheets
Web › CSS › Compositing and Blending
compositing and blending is a css module that defines how shapes of different elements are combined into a single image.
Descendant combinator - CSS: Cascading Style Sheets
Web › CSS › Descendant combinator
the descendant combinator — typically represented by a single space ( ) character — combines two selectors such that elements matched by the second selector are selected if they have an ancestor (parent, parent's parent, parent's parent's parent, etc) element matching the first selector.
Filter Effects - CSS: Cascading Style Sheets
Web › CSS › Filter Effects
filter effects is a module of css that defines a way of processing an element’s rendering before it is displayed in the document.
Card - CSS: Cascading Style Sheets
Web › CSS › Layout cookbook › Card
note: the various elements in separate cards do not align with each other, as each card is an independent grid.
Column layouts - CSS: Cascading Style Sheets
Web › CSS › Layout cookbook › Column layouts
a single row of items with equal heights — flexbox flexbox can be used to break content into columns by setting flex-direction to row, however flexbox targets the elements inside the flex container and will place each direct child into a new column.
Grid wrapper - CSS: Cascading Style Sheets
Web › CSS › Layout cookbook › Grid wrapper
the grid wrapper pattern is useful for aligning grid content within a central wrapper, while also allowing items to break out and align to the edge of the containing element or page when desired.
Recipe: Media objects - CSS: Cascading Style Sheets
Web › CSS › Layout cookbook › Media objects
download this example once floated elements become grid items the float no longer applies so you don’t need to do anything special to clear the float.
Sticky footers - CSS: Cascading Style Sheets
Web › CSS › Layout cookbook › Sticky footers
then we set our main content to flex-grow: 1 and the other two elements to flex-shrink: 0 — this prevents them from shrinking smaller when content fills the main area.
CSS Layout cookbook - CSS: Cascading Style Sheets
Web › CSS › Layout cookbook
css grid, multicol, flexbox center an element how to center an item horizontally and vertically.
Microsoft CSS extensions - CSS: Cascading Style Sheets
Web › CSS › Microsoft extensions
-ms-scrollbar-track-color -ms-scroll-chaining -ms-scroll-limit -ms-scroll-limit-x-max -ms-scroll-limit-x-min -ms-scroll-limit-y-max -ms-scroll-limit-y-min -ms-scroll-rails -ms-scroll-snap-points-x -ms-scroll-snap-points-y -ms-scroll-snap-x -ms-scroll-snap-y -ms-scroll-translation -ms-text-autospace -ms-touch-select -ms-wrap-flow -ms-wrap-margin -ms-wrap-through zoom pseudo-elements ::-ms-browse ::-ms-check ::-ms-clear ::-ms-expand ::-ms-fill ::-ms-fill-lower ::-ms-fill-upper ::-ms-reveal ::-ms-thumb ::-ms-ticks-after ::-ms-ticks-before ::-ms-tooltip ::-ms-track ::-ms-value media features -ms-high-contrast css-related dom apis mscontentzoomfactor msgetpropertyenabled msgetregioncontent msrangecollection msregionoverflow ...
Paged media - CSS: Cascading Style Sheets
Web › CSS › Paged Media
it allows you to set page breaks, control printable area, style left and right pages differently, and control breaks inside elements.
align-content - CSS: Cascading Style Sheets
Web › CSS › align-content
fe center</option> <option value="safe right">safe right</option> <option value="unsafe right">unsafe right</option> <option value="safe end">safe end</option> <option value="unsafe end">unsafe end</option> <option value="safe flex-end">safe flex-end</option> <option value="unsafe flex-end">unsafe flex-end</option> </select> </div> javascript var values = document.getelementbyid('values'); var display = document.getelementbyid('display'); var container = document.getelementbyid('container'); values.addeventlistener('change', function (evt) { container.style.aligncontent = evt.target.value; }); display.addeventlistener('change', function (evt) { container.classname = evt.target.value; }); result specifications specification status comment ...
align-self - CSS: Cascading Style Sheets
Web › CSS › align-self
formal definition initial valueautoapplies toflex items, grid items, and absolutely-positioned boxesinheritednocomputed valueauto computes to itself on absolutely-positioned elements, and to the computed value of align-items on the parent (minus any legacy keywords) on all other boxes, or start if the box has no parent.
animation-direction - CSS: Cascading Style Sheets
Web › CSS › animation-direction
formal definition initial valuenormalapplies toall elements, ::before and ::after pseudo-elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <single-animation-direction>#where <single-animation-direction> = normal | reverse | alternate | alternate-reverse examples see css animations for examples.
animation-duration - CSS: Cascading Style Sheets
Web › CSS › animation-duration
formal definition initial value0sapplies toall elements, ::before and ::after pseudo-elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <time># examples see css animations for examples.
animation-iteration-count - CSS: Cascading Style Sheets
Web › CSS › animation-iteration-count
formal definition initial value1applies toall elements, ::before and ::after pseudo-elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <single-animation-iteration-count>#where <single-animation-iteration-count> = infinite | <number> examples see css animations for examples.
animation-play-state - CSS: Cascading Style Sheets
Web › CSS › animation-play-state
formal definition initial valuerunningapplies toall elements, ::before and ::after pseudo-elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <single-animation-play-state>#where <single-animation-play-state> = running | paused examples see css animations for examples.
animation - CSS: Cascading Style Sheets
Web › CSS › animation
anding wcag, guideline 2.2 explanations understanding success criterion 2.2.2 | w3c understanding wcag 2.0 formal definition initial valueas each of the properties of the shorthand:animation-name: noneanimation-duration: 0sanimation-timing-function: easeanimation-delay: 0sanimation-iteration-count: 1animation-direction: normalanimation-fill-mode: noneanimation-play-state: runningapplies toall elements, ::before and ::after pseudo-elementsinheritednocomputed valueas each of the properties of the shorthand:animation-name: as specifiedanimation-duration: as specifiedanimation-timing-function: as specifiedanimation-delay: as specifiedanimation-direction: as specifiedanimation-iteration-count: as specifiedanimation-fill-mode: as specifiedanimation-play-state: as specifiedanimation typediscrete fo...
background-origin - CSS: Cascading Style Sheets
Web › CSS › background-origin
formal definition initial valuepadding-boxapplies toall elements.
<blend-mode> - CSS: Cascading Style Sheets
Web › CSS › blend-mode
the <blend-mode> css data type describes how colors should appear when elements overlap.
border-collapse - CSS: Cascading Style Sheets
Web › CSS › border-collapse
formal definition initial valueseparateapplies totable and inline-table elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax collapse | separate examples a colorful table of browser engines html <table class="separate"> <caption><code>border-collapse: separate</code></caption> <tbody> <tr><th>browser</th> <th>layout engine</th></tr> <tr><td class="fx">firefox</td> <td class="gk">gecko</td></tr> <tr><td class="ed">edge</td> ...
border-spacing - CSS: Cascading Style Sheets
Web › CSS › border-spacing
formal definition initial value0applies totable and inline-table elementsinheritedyescomputed valuetwo absolute lengthsanimation typediscrete formal syntax <length> <length>?
caption-side - CSS: Cascading Style Sheets
Web › CSS › caption-side
formal definition initial valuetopapplies totable-caption elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax top | bottom | block-start | block-end | inline-start | inline-end examples setting captions above and below html <table class="top"> <caption>caption above the table</caption> <tr> <td>some data</td> <td>some more data</td> </tr> </table> <br> <table class="bottom"> <caption>caption below the table...
column-rule-color - CSS: Cascading Style Sheets
Web › CSS › column-rule-color
formal definition initial valuecurrentcolorapplies tomulticol elementsinheritednocomputed valuecomputed coloranimation typea color formal syntax <color>where <color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>where <rgb()> = rgb( <percentage>{3} [ / <alpha-value> ]?
column-rule-style - CSS: Cascading Style Sheets
Web › CSS › column-rule-style
formal definition initial valuenoneapplies tomulticol elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <'border-style'> examples setting a dashed column rule html <p>this is a bunch of text split into three columns.
column-rule-width - CSS: Cascading Style Sheets
Web › CSS › column-rule-width
formal definition initial valuemediumapplies tomulticol elementsinheritednocomputed valuethe absolute length; 0 if the column-rule-style is none or hiddenanimation typea length formal syntax <'border-width'> examples setting a thick column rule html <p>this is a bunch of text split into three columns.
column-rule - CSS: Cascading Style Sheets
Web › CSS › column-rule
formal definition initial valueas each of the properties of the shorthand:column-rule-width: mediumcolumn-rule-style: nonecolumn-rule-color: currentcolorapplies tomulticol elementsinheritednocomputed valueas each of the properties of the shorthand:column-rule-color: computed colorcolumn-rule-style: as specifiedcolumn-rule-width: the absolute length; 0 if the column-rule-style is none or hiddenanimation typeas each of the properties of the shorthand:column-rule-color: a colorcolumn-rule-style: discretecolumn-rule-width: a length formal syntax <'column-rule-width'> | <'col...
Computed value - CSS: Cascading Style Sheets
Web › CSS › computed value
for example, if an element has specified values font-size: 16px and padding-top: 2em, then the computed value of padding-top is 32px (double the font size).
conic-gradient() - CSS: Cascading Style Sheets
Web › CSS › conic-gradient
its concrete size will match the size of the element it applies to, or size of the <image> is set to something other than the element size.
counter-increment - CSS: Cascading Style Sheets
Web › CSS › counter-increment
formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax [ <custom-ident> <integer>?
counter() - CSS: Cascading Style Sheets
Web › CSS › counter
it is generally used with pseudo-elements, but can be used, theoretically, anywhere a <string> value is supported.
counters() - CSS: Cascading Style Sheets
Web › CSS › counters
it is generally used with pseudo-elements, but can be used, theoretically, anywhere a <string> value is supported.
empty-cells - CSS: Cascading Style Sheets
Web › CSS › empty-cells
formal definition initial valueshowapplies totable-cell elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax show | hide example showing and hiding empty table cells html <table class="table_1"> <tr> <td>moe</td> <td>larry</td> </tr> <tr> <td>curly</td> <td></td> </tr> </table> <br> <table class="table_2"> <tr> <td>moe</td> <td>larry</td> </tr> <tr> <td>curly</td> <td></td> </...
env() - CSS: Cascading Style Sheets
Web › CSS › env
the difference is that, as well as being user-agent defined rather than user-defined, environment variables are globally scoped to a document, whereas custom properties are scoped to the element(s) on which they are declared.
hue-rotate() - CSS: Cascading Style Sheets
Web › CSS › filter-function › hue-rotate
the hue-rotate() css function rotates the hue of an element and its contents.
flex-flow - CSS: Cascading Style Sheets
Web › CSS › flex-flow
formal definition initial valueas each of the properties of the shorthand:flex-direction: rowflex-wrap: nowrapapplies toflex containersinheritednocomputed valueas each of the properties of the shorthand:flex-direction: as specifiedflex-wrap: as specifiedanimation typediscrete formal syntax <'flex-direction'> | <'flex-wrap'> examples setting column-reverse and wrap element { /* main-axis is the block direction with reversed main-start and main-end.
flex-grow - CSS: Cascading Style Sheets
Web › CSS › flex-grow
formal definition initial value0applies toflex items, including in-flow pseudo-elementsinheritednocomputed valueas specifiedanimation typea number formal syntax <number> examples setting flex item grow factor html <h4>this is a flex-grow</h4> <h5>a,b,c and f are flex-grow:1 .
flex-shrink - CSS: Cascading Style Sheets
Web › CSS › flex-shrink
formal definition initial value1applies toflex items, including in-flow pseudo-elementsinheritednocomputed valueas specifiedanimation typea number formal syntax <number> examples setting flex item shrink factor html <p>the width of content is 500px; the flex-basis of the flex items is 120px.</p> <p>a, b, c have flex-shrink:1 set.
font-feature-settings - CSS: Cascading Style Sheets
Web › CSS › font-feature-settings
formal definition initial valuenormalapplies toall elements.
font-language-override - CSS: Cascading Style Sheets
Web › CSS › font-language-override
formal definition initial valuenormalapplies toall elements.
font-optical-sizing - CSS: Cascading Style Sheets
Web › CSS › font-optical-sizing
formal definition initial valueautoapplies toall elements.
font-size-adjust - CSS: Cascading Style Sheets
Web › CSS › font-size-adjust
formal definition initial valuenoneapplies toall elements.
font-smooth - CSS: Cascading Style Sheets
Web › CSS › font-smooth
formal definition initial valueautoapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax auto | never | always | <absolute-size> | <length>where <absolute-size> = xx-small | x-small | small | medium | large | x-large | xx-large | xxx-large examples basic usage example the following example shows the safari/chromium and firefox equivalents that turn on font-smoothing on macos.
font-stretch - CSS: Cascading Style Sheets
Web › CSS › font-stretch
formal definition initial valuenormalapplies toall elements.
font-style - CSS: Cascading Style Sheets
Web › CSS › font-style
mdn understanding wcag, guideline 1.4 explanations w3c understanding wcag 2.1 formal definition initial valuenormalapplies toall elements.
font-synthesis - CSS: Cascading Style Sheets
Web › CSS › font-synthesis
formal definition initial valueweight styleapplies toall elements.
font-variant-alternates - CSS: Cascading Style Sheets
Web › CSS › font-variant-alternates
formal definition initial valuenormalapplies toall elements.
font-variant-caps - CSS: Cascading Style Sheets
Web › CSS › font-variant-caps
mdn understanding wcag, guideline 1.4 explanations w3c understanding wcag 2.1 formal definition initial valuenormalapplies toall elements.
font-variant-east-asian - CSS: Cascading Style Sheets
Web › CSS › font-variant-east-asian
formal definition initial valuenormalapplies toall elements.
font-variant-numeric - CSS: Cascading Style Sheets
Web › CSS › font-variant-numeric
formal definition initial valuenormalapplies toall elements.
font-variant - CSS: Cascading Style Sheets
Web › CSS › font-variant
formal definition initial valuenormalapplies toall elements.
font-variation-settings - CSS: Cascading Style Sheets
Web › CSS › font-variation-settings
formal definition initial valuenormalapplies toall elements.
<gradient> - CSS: Cascading Style Sheets
Web › CSS › gradient
its concrete size will match the size of the element to which it applies.
grid-auto-flow - CSS: Cascading Style Sheets
Web › CSS › grid-auto-flow
repeat(4, 1fr) / repeat(2, 1fr); grid-auto-flow: column; /* or 'row', 'row dense', 'column dense' */ } #item1 { background-color: lime; grid-row-start: 3; } #item2 { background-color: yellow; } #item3 { background-color: blue; } #item4 { grid-column-start: 2; background-color: red; } #item5 { background-color: aqua; } function changegridautoflow() { var grid = document.getelementbyid("grid"); var direction = document.getelementbyid("direction"); var dense = document.getelementbyid("dense"); var gridautoflow = direction.value === "row" ?
grid - CSS: Cascading Style Sheets
Web › CSS › grid
id-auto-rows: the percentage as specified or the absolute lengthgrid-auto-columns: the percentage as specified or the absolute lengthgrid-auto-flow: as specifiedgrid-column-gap: the percentage as specified or the absolute lengthgrid-row-gap: the percentage as specified or the absolute lengthcolumn-gap: as specified, with <length>s made absolute, and normal computing to zero except on multi-column elementsrow-gap: as specified, with <length>s made absolute, and normal computing to zero except on multi-column elementsanimation typediscrete formal syntax <'grid-template'> | <'grid-template-rows'> / [ auto-flow && dense?
image-set() - CSS: Cascading Style Sheets
Web › CSS › image-set
see also <image> image() element() <url> <gradient> cross-fade() ...
initial-letter-align - CSS: Cascading Style Sheets
Web › CSS › initial-letter-align
formal definition initial valueautoapplies to::first-letter pseudo-elements and inline-level first child of a block containerinheritednocomputed valueas specifiedanimation typediscrete formal syntax [ auto | alphabetic | hanging | ideographic ] examples aligning initial letter html <p class="auto ">initial letter - auto</p> <p class="alphabetic">initial letter - alphabetic</p> <p class="hanging">initial letter - hanging</p> <p class="ideographic">initial letter - ...
initial-letter - CSS: Cascading Style Sheets
Web › CSS › initial-letter
formal definition initial valuenormalapplies to::first-letter pseudo-elements and inline-level first child of a block containerinheritednocomputed valueas specifiedanimation typediscrete formal syntax normal | [ <number> <integer>?
justify-self - CSS: Cascading Style Sheets
Web › CSS › justify-self
for absolutely-positioned elements, it aligns an item inside its containing block on the inline axis, accounting for the offset values of top, left, bottom, and right.
letter-spacing - CSS: Cascading Style Sheets
Web › CSS › letter-spacing
mdn understanding wcag, guideline 1.4 explanations understanding success criterion 1.4.8 | w3c understanding wcag 2.0 formal definition initial valuenormalapplies toall elements.
line-break - CSS: Cascading Style Sheets
Web › CSS › line-break
formal definition initial valueautoapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax auto | loose | normal | strict | anywhere examples setting text wrapping see whether the text is wrapped before "々", "ぁ" and "。".
linear-gradient() - CSS: Cascading Style Sheets
Web › CSS › linear-gradient
its concrete size will match the size of the element it applies to.
margin-block - CSS: Cascading Style Sheets
Web › CSS › margin-block
the margin-block css shorthand property defines the logical block start and end margins of an element, which maps to physical margins depending on the element's writing mode, directionality, and text orientation.
margin-inline - CSS: Cascading Style Sheets
Web › CSS › margin-inline
the margin-inline css shorthand property is a shorthand property that defines both the logical inline start and end margins of an element, which maps to physical margins depending on the element's writing mode, directionality, and text orientation.
mask-border-mode - CSS: Cascading Style Sheets
Web › CSS › mask-border-mode
formal definition initial valuealphaapplies toall elements; in svg, it applies to container elements excluding the defs element and all graphics elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax luminance | alpha examples basic usage this property doesn't yet seem to have support anywhere.
order - CSS: Cascading Style Sheets
Web › CSS › order
syntax /* <integer> values */ order: 5; order: -5; /* global values */ order: inherit; order: initial; order: unset; since order is only meant to affect the visual order of elements and not their logical or tab order.
orphans - CSS: Cascading Style Sheets
Web › CSS › orphans
formal definition initial value2applies toblock container elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax <integer> examples setting a minimum orphan size of three lines html <div> <p>this is the first paragraph containing some text.</p> <p>this is the second paragraph containing some more text than the first one.
<percentage> - CSS: Cascading Style Sheets
Web › CSS › percentage
it is often used to define a size as relative to an element's parent object.
place-self - CSS: Cascading Style Sheets
Web › CSS › place-self
formal definition initial valueas each of the properties of the shorthand:align-self: autojustify-self: autoapplies toblock-level boxes, absolutely-positioned boxes, and grid itemsinheritednocomputed valueas each of the properties of the shorthand:align-self: auto computes to itself on absolutely-positioned elements, and to the computed value of align-items on the parent (minus any legacy keywords) on all other boxes, or start if the box has no parent.
radial-gradient() - CSS: Cascading Style Sheets
Web › CSS › radial-gradient
its concrete size will match the size of the element it applies to.
repeating-conic-gradient() - CSS: Cascading Style Sheets
Web › CSS › repeating-conic-gradient
its concrete size will match the size of the element it applies to, or the size the <image> is set to if it's set to something other than the element's size.
repeating-linear-gradient() - CSS: Cascading Style Sheets
Web › CSS › repeating-linear-gradient
its concrete size will match the size of the element it applies to.
repeating-radial-gradient() - CSS: Cascading Style Sheets
Web › CSS › repeating-radial-gradient
its concrete size will match the size of the element it applies to.
scroll-margin-block-end - CSS: Cascading Style Sheets
Web › CSS › scroll-margin-block-end
formal definition initial value0applies toall elementsinheritednocomputed valueas specifiedanimation typeby computed value type formal syntax <length> specifications specification status comment css scroll snap module level 1the definition of 'scroll-margin-block-end' in that specification.
scroll-margin-block-start - CSS: Cascading Style Sheets
Web › CSS › scroll-margin-block-start
formal definition initial value0applies toall elementsinheritednocomputed valueas specifiedanimation typeby computed value type formal syntax <length> specifications specification status comment css scroll snap module level 1the definition of 'scroll-margin-block-start' in that specification.
scroll-margin-bottom - CSS: Cascading Style Sheets
Web › CSS › scroll-margin-bottom
formal definition initial value0applies toall elementsinheritednocomputed valueas specifiedanimation typeby computed value type formal syntax <length> specifications specification status comment css scroll snap module level 1the definition of 'scroll-margin-bottom' in that specification.
scroll-margin-left - CSS: Cascading Style Sheets
Web › CSS › scroll-margin-left
formal definition initial value0applies toall elementsinheritednocomputed valueas specifiedanimation typeby computed value type formal syntax <length> specifications specification status comment css scroll snap module level 1the definition of 'scroll-margin-left' in that specification.
scroll-margin-right - CSS: Cascading Style Sheets
Web › CSS › scroll-margin-right
formal definition initial value0applies toall elementsinheritednocomputed valueas specifiedanimation typeby computed value type formal syntax <length> specifications specification status comment css scroll snap module level 1the definition of 'scroll-margin-right' in that specification.
scroll-margin-top - CSS: Cascading Style Sheets
Web › CSS › scroll-margin-top
formal definition initial value0applies toall elementsinheritednocomputed valueas specifiedanimation typeby computed value type formal syntax <length> specifications specification status comment css scroll snap module level 1the definition of 'scroll-margin-top' in that specification.
scroll-padding-block-end - CSS: Cascading Style Sheets
Web › CSS › scroll-padding-block-end
this allows the author to exclude regions of the scrollport that are obscured by other content (such as fixed-positioned toolbars or sidebars) or simply to put more breathing room between a targetted element and the edges of the scrollport.
scroll-padding-block-start - CSS: Cascading Style Sheets
Web › CSS › scroll-padding-block-start
this allows the author to exclude regions of the scrollport that are obscured by other content (such as fixed-positioned toolbars or sidebars) or simply to put more breathing room between a targetted element and the edges of the scrollport.
scroll-padding-bottom - CSS: Cascading Style Sheets
Web › CSS › scroll-padding-bottom
this allows the author to exclude regions of the scrollport that are obscured by other content (such as fixed-positioned toolbars or sidebars) or simply to put more breathing room between a targetted element and the edges of the scrollport.
scroll-padding-inline-end - CSS: Cascading Style Sheets
Web › CSS › scroll-padding-inline-end
this allows the author to exclude regions of the scrollport that are obscured by other content (such as fixed-positioned toolbars or sidebars) or simply to put more breathing room between a targetted element and the edges of the scrollport.
scroll-padding-inline-start - CSS: Cascading Style Sheets
Web › CSS › scroll-padding-inline-start
this allows the author to exclude regions of the scrollport that are obscured by other content (such as fixed-positioned toolbars or sidebars) or simply to put more breathing room between a targetted element and the edges of the scrollport.
scroll-padding-left - CSS: Cascading Style Sheets
Web › CSS › scroll-padding-left
this allows the author to exclude regions of the scrollport that are obscured by other content (such as fixed-positioned toolbars or sidebars) or simply to put more breathing room between a targetted element and the edges of the scrollport.
scroll-padding-right - CSS: Cascading Style Sheets
Web › CSS › scroll-padding-right
this allows the author to exclude regions of the scrollport that are obscured by other content (such as fixed-positioned toolbars or sidebars) or simply to put more breathing room between a targetted element and the edges of the scrollport.
scroll-padding-top - CSS: Cascading Style Sheets
Web › CSS › scroll-padding-top
this allows the author to exclude regions of the scrollport that are obscured by other content (such as fixed-positioned toolbars or sidebars) or simply to put more breathing room between a targetted element and the edges of the scrollport.
scroll-snap-align - CSS: Cascading Style Sheets
Web › CSS › scroll-snap-align
formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax [ none | start | end | center ]{1,2} specifications specification status comment css scroll snap module level 1the definition of 'scroll-snap-align' in that specification.
scroll-snap-destination - CSS: Cascading Style Sheets
Web › CSS › scroll-snap-destination
the scroll-snap-destination css property defines the position in x and y coordinates within the scroll container's visual viewport which element snap points align with.
scroll-snap-points-x - CSS: Cascading Style Sheets
Web › CSS › scroll-snap-points-x
elements within the scroll container may still define snap points on behalf of the scroll container.
scroll-snap-points-y - CSS: Cascading Style Sheets
Web › CSS › scroll-snap-points-y
elements within the scroll container may still define snap points on behalf of the scroll container.
scrollbar-color - CSS: Cascading Style Sheets
Web › CSS › scrollbar-color
note: user agents must apply any scrollbar-color value set on the root element to the viewport.
text-align-last - CSS: Cascading Style Sheets
Web › CSS › text-align-last
formal definition initial valueautoapplies toblock containersinheritedyescomputed valueas specifiedanimation typediscrete formal syntax auto | start | end | left | right | center | justify examples justifying the last line <p>integer elementum massa at nulla placerat varius.
text-combine-upright - CSS: Cascading Style Sheets
Web › CSS › text-combine-upright
formal definition initial valuenoneapplies tonon-replaced inline elementsinheritedyescomputed valuespecified keyword, plus integer if 'digits'animation typediscrete formal syntax none | all | [ digits <integer>?
text-decoration-skip-ink - CSS: Cascading Style Sheets
Web › CSS › text-decoration-skip-ink
formal definition initial valueautoapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax auto | all | none examples html <p>you should go on a quest for a cup of coffee.</p> <p class="no-skip-ink">or maybe you'd prefer some tea?</p> <p>この文は、 text-decoration-skip-ink: auto の使用例を示しています。</p> <p class="skip-ink-all">この文は、 text-decoration-skip-ink: all の使用例�...
text-decoration-style - CSS: Cascading Style Sheets
Web › CSS › text-decoration-style
formal definition initial valuesolidapplies toall elements.
text-emphasis-color - CSS: Cascading Style Sheets
Web › CSS › text-emphasis-color
formal definition initial valuecurrentcolorapplies toall elementsinheritednocomputed valuecomputed coloranimation typea color formal syntax <color>where <color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>where <rgb()> = rgb( <percentage>{3} [ / <alpha-value> ]?
text-emphasis-style - CSS: Cascading Style Sheets
Web › CSS › text-emphasis-style
formal definition initial valuenoneapplies toall elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax none | [ [ filled | open ] | [ dot | circle | double-circle | triangle | sesame ] ] | <string> examples h2 { text-emphasis-style: sesame; } specifications specification status comment css text decoration module level 3the definition of 'text-emphasis' in that specification.
text-indent - CSS: Cascading Style Sheets
Web › CSS › text-indent
horizontal spacing is with respect to the left (or right, for right-to-left layout) edge of the containing block-level element's content box.
text-rendering - CSS: Cascading Style Sheets
Web › CSS › text-rendering
formal definition initial valueautoapplies totext elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax auto | optimizespeed | optimizelegibility | geometricprecision examples automatic application of optimizelegibility this demonstrates how optimizelegibility is used by browsers automatically when the font-size is smaller than 20px.
text-underline-position - CSS: Cascading Style Sheets
Web › CSS › text-underline-position
formal definition initial valueautoapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax auto | from-font | [ under | [ left | right ] ] examples a simple example let's take a couple of simple example paragraphs: <p class="horizontal">lorem ipsum dolor sit amet, consectetur adipiscing elit.
rotate3d() - CSS: Cascading Style Sheets
Web › CSS › transform-function › rotate3d
the rotate3d() css function defines a transformation that rotates an element around a fixed axis in 3d space, without deforming it.
rotateX() - CSS: Cascading Style Sheets
Web › CSS › transform-function › rotateX
the rotatex() css function defines a transformation that rotates an element around the abscissa (horizontal axis) without deforming it.
rotateY() - CSS: Cascading Style Sheets
Web › CSS › transform-function › rotateY
the rotatey() css function defines a transformation that rotates an element around the ordinate (vertical axis) without deforming it.
rotateZ() - CSS: Cascading Style Sheets
Web › CSS › transform-function › rotateZ
the rotatez() css function defines a transformation that rotates an element around the z-axis without deforming it.
translateX() - CSS: Cascading Style Sheets
Web › CSS › transform-function › translateX
the translatex() css function repositions an element horizontally on the 2d plane.
translateY() - CSS: Cascading Style Sheets
Web › CSS › transform-function › translateY
the translatey() css function repositions an element vertically on the 2d plane.
transition-delay - CSS: Cascading Style Sheets
Web › CSS › transition-delay
formal definition initial value0sapplies toall elements, ::before and ::after pseudo-elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <time># examples transition-delay: 0.5s <div class="parent"> <div class="box">lorem</div> </div> .parent { width: 250px; height:125px;} .box { width: 100px; height: 100px; background-color: red; font-size: 20px; left: 0px; top: 0px; position:ab...
transition-duration - CSS: Cascading Style Sheets
Web › CSS › transition-duration
formal definition initial value0sapplies toall elements, ::before and ::after pseudo-elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <time># examples transition-duration: 0.5s <div class="parent"> <div class="box">lorem</div> </div> .parent { width: 250px; height:125px;} .box { width: 100px; height: 100px; background-color: red; font-size: 20px; left: 0px; top: 0px; position...
transition-property - CSS: Cascading Style Sheets
Web › CSS › transition-property
formal definition initial valueallapplies toall elements, ::before and ::after pseudo-elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax none | <single-transition-property>#where <single-transition-property> = all | <custom-ident> examples there are several examples of css transitions included in the main css transitions article.
transition-timing-function - CSS: Cascading Style Sheets
Web › CSS › transition-timing-function
formal definition initial valueeaseapplies toall elements, ::before and ::after pseudo-elementsinheritednocomputed valueas specifiedanimation typediscrete formal syntax <timing-function>#where <timing-function> = linear | <cubic-bezier-timing-function> | <step-timing-function>where <cubic-bezier-timing-function> = ease | ease-in | ease-out | ease-in-out | cubic-bezier(<number <a href="/docs/css/value_definition_syntax#brackets" title="brackets: enclo...
user-modify - CSS: Cascading Style Sheets
Web › CSS › user-modify
it was originally planned to determine whether or not the content of an element can be edited by a user.
widows - CSS: Cascading Style Sheets
Web › CSS › widows
formal definition initial value2applies toblock container elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax <integer> examples controlling column widows html <div> <p>this is the first paragraph containing some text.</p> <p>this is the second paragraph containing some more text than the first one.
word-break - CSS: Cascading Style Sheets
Web › CSS › word-break
formal definition initial valuenormalapplies toall elementsinheritedyescomputed valueas specifiedanimation typediscrete formal syntax normal | break-all | keep-all | break-word examples html <p>1.
word-spacing - CSS: Cascading Style Sheets
Web › CSS › word-spacing
mdn understanding wcag, guideline 1.4 explanations understanding success criterion 1.4.8 | w3c understanding wcag 2.0 formal definition initial valuenormalapplies toall elements.
CSS: Cascading Style Sheets
Web › CSS
css describes how elements should be rendered on screen, on paper, in speech, or on other media.
exsl:node-set() - EXSLT
Web › EXSLT › exsl › node-set
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes exsl:node-set() returns a node-set from a result tree fragment, which is what you get when you look at the xsl:variable instead of its select attribute to fetch a variable's value.
exsl:object-type() - EXSLT
Web › EXSLT › exsl › object-type
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes exsl:object-type() returns a string that indicates the type of the specified object.
Common (exsl) - EXSLT
Web › EXSLT › exsl
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the exslt common package provides basic functions that expand upon the capabilities of xslt.
math:highest() - EXSLT
Web › EXSLT › math › highest
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes math:highest() returns the node in the specified node-set with the highest value (where the highest value calculated using math:max()).
math:lowest() - EXSLT
Web › EXSLT › math › lowest
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes math:lowest() returns the node in the specified node-set with the lowest value (where the lowest value calculated using math:min()).
math:max() - EXSLT
Web › EXSLT › math › max
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes math:max() returns the maximum value of a node-set.
math:min() - EXSLT
Web › EXSLT › math › min
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes math:min() returns the minimum value of a node-set.
Math (math) - EXSLT
Web › EXSLT › math
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the exslt math package provides functions for working with numeric values and comparing nodes.
regexp:replace() - EXSLT
Web › EXSLT › regexp › replace
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes regexp:replace() replaces the portions of a string that match a given regular expression with the contents of another string.
regexp:test() - EXSLT
Web › EXSLT › regexp › test
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes regexp:test() tests to see whether a string matches a specified regular expression.
Regular expressions (regexp) - EXSLT
Web › EXSLT › regexp
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the exslt regular expressions package provides functions that allow testing, matching, and replacing text using javascript style regular expressions.
set:difference() - EXSLT
Web › EXSLT › set › difference
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes set:difference() returns the difference between two node-sets.
set:distinct() - EXSLT
Web › EXSLT › set › distinct
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes set:distinct() returns a subset of the nodes in the specified node-set, returning only nodes with unique string values.
set:has-same-node() - EXSLT
Web › EXSLT › set › has-same-node
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes set:has-same-node() determines whether two node-sets have any nodes in common.
set:intersection() - EXSLT
Web › EXSLT › set › intersection
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes set:intersection() returns the intersection of two node-sets.
set:leading() - EXSLT
Web › EXSLT › set › leading
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes set:leading() returns the nodes in one node-set that come before the first node in the other node-set.
set:trailing() - EXSLT
Web › EXSLT › set › trailing
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes set:trailing() returns the nodes in one node-set that come after the first node in the other node-set.
Sets (set) - EXSLT
Web › EXSLT › set
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the exslt sets package offers functions that let you perform set manipulation.
str:concat() - EXSLT
Web › EXSLT › str › concat
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes str:concat() returns a string containing all the string values in a node-set concatenated together.
Strings (str) - EXSLT
Web › EXSLT › str
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the exslt strings package provides functions that allow the manipulation of strings.
EXSLT
Web › EXSLT
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes exslt is a set of extensions to xslt.
touchstart - Event reference
Web › Events › touchstart
element: touchstart document: touchstart bubbles yes cancelable yes interface touchevent event handler property ontouchstart specifications specification status touch events recommendation ...
Ajax - Developer guides
Web › Guide › AJAX
file objects may be obtained from a filelist object returned as a result of a user selecting files using the <input> element, from a drag and drop operation's datatransfer object, or from the mozgetasfile() api on an htmlcanvaselement.
Writing Web Audio API code that works in every browser - Developer guides
Web › Guide › Audio and video delivery › Web Audio API cross browser
things that are not ready yet second, ensure that your project doesn't use node types that are not implemented yet in firefox: mediastreamaudiosourcenode, mediaelementaudiosourcenode and oscillatornode.
Event developer guide - Developer guides
Web › Guide › Events
two common styles are: the generalized addeventlistener() and a set of specific on-event handlers.media eventsvarious events are sent when handling media that are embedded in html documents using the <audio> and <video> elements; this section lists them and provides some helpful information about using them.mouse gesture eventsgecko 1.9.1 added support for several mozilla-specific dom events used to handle mouse gestures.
Introduction to HTML5 - Developer guides
Web › Guide › HTML › HTML5 › Introduction to HTML5
in previous versions of html, it was done using a very complex <meta> element.
Localizations and character encodings - Developer guides
Web › Guide › Localizations and character encodings
the <meta> element's charset attribute is used to specify the page's character encoding.
A hybrid approach - Developer guides
Web › Guide › Mobile › A hybrid approach
we used some elements of responsive web design to give the site a mobile layout, along with user-agent detection to provide mobile-friendly videos and to re-order the demos if the user is on a phone.
Mobile-friendliness - Developer guides
Web › Guide › Mobile › Mobile-friendliness
a slimmed-down, linearized page layout with elements sized for a touchscreen would be much more appropriate.
HTML attribute: minlength - HTML: Hypertext Markup Language
Web › HTML › Attributes › minlength
<label for="fruit">enter a fruit name that is at least 5 letters long</label> <input type="text" minlength="5" id="fruit"> we can use pseudoclasses to style the element based on whether the value is valid.
manifest - HTML: Hypertext Markup Language
Web › HTML › Element › html › manifest
the manifest attribute of <html> element specifies a url of a application cache manifest that is downloaded in the early stages of page load.
inputmode - HTML: Hypertext Markup Language
Web › HTML › Global attributes › inputmode
the inputmode global attribute is an enumerated attribute that hints at the type of data that might be entered by the user while editing the element or its contents.
slot - HTML: Hypertext Markup Language
Web › HTML › Global attributes › slot
the slot global attribute assigns a slot in a shadow dom shadow tree to an element: an element with a slot attribute is assigned to the slot created by the <slot> element whose name attribute's value matches that slot attribute's value.
x-ms-format-detection - HTML: Hypertext Markup Language
Web › HTML › Global attributes › x-ms-format-detection
the x-ms-format-detection attribute determines whether data formats within the element’s text, like phone numbers, are automatically converted to followable links.
Link types: dns-prefetch - HTML: Hypertext Markup Language
Web › HTML › Link types › dns-prefetch
the dns-prefetch keyword for the rel attribute of the <link> element is a hint to browsers that the user is likely to need resources from the target resource's origin, and therefore the browser can likely improve the user experience by preemptively performing dns resolution for that origin.
Link types: manifest - HTML: Hypertext Markup Language
Web › HTML › Link types › manifest
the manifest keyword for the rel attribute of the <link> element indicates that the target resource is a web app manifest.
Link types: modulepreload - HTML: Hypertext Markup Language
Web › HTML › Link types › modulepreload
the modulepreload keyword for the rel attribute of the <link> element provides a declarative way to preemptively fetch a module script and its dependencies, and store them in the document's module map for later evaluation.
Link types: noopener - HTML: Hypertext Markup Language
Web › HTML › Link types › noopener
the noopener keyword for the rel attribute of the <a>, <area>, and <form> elements instructs the browser to navigate to the target resource without granting the new browsing context access to the document that opened it — by not setting the window.opener property on the opened window (it returns null).
Link types: noreferrer - HTML: Hypertext Markup Language
Web › HTML › Link types › noreferrer
the noreferrer keyword for the rel attribute of the <a>, <area>, and <form> elements instructs the browser, when navigating to the target resource, to omit the referer header and otherwise leak no referrer information — and additionally to behave as if the noopener keyword were also specified.
Link types: preconnect - HTML: Hypertext Markup Language
Web › HTML › Link types › preconnect
the preconnect keyword for the rel attribute of the <link> element is a hint to browsers that the user is likely to need resources from the target resource's origin, and therefore the browser can likely improve the user experience by preemptively initiating a connection to that origin.
Link types: prefetch - HTML: Hypertext Markup Language
Web › HTML › Link types › prefetch
the prefetch keyword for the rel attribute of the <link> element is a hint to browsers that the user is likely to need the target resource for future navigations, and therefore the browser can likely improve the user experience by preemptively fetching and caching the resource.
Link types: preload - HTML: Hypertext Markup Language
Web › HTML › Link types › preload
the preload keyword for the rel attribute of the <link> element indicates the user is highly likely to require the target resource for the current navigation, and therefore the browser must preemptively fetch and cache the resource.
Link types: prerender - HTML: Hypertext Markup Language
Web › HTML › Link types › prerender
the prerender keyword for the rel attribute of the <link> element is a hint to browsers that the user might need the target resource for the next navigation, and therefore the browser can likely improve the user experience by preemptively fetching and processing the resource — for example, by fetching its subresources or performing some rendering in the background offscreen.
HTTP caching - HTTP
Web › HTTP › Caching
this is very important when web sites have css stylesheets or js scripts that have mutual dependencies, i.e., they depend on each other because they refer to the same html elements.
HTTP conditional requests - HTTP
Web › HTTP › Conditional requests
building a system of etags that creates weak validation may be complex, as it involves knowing the importance of the different elements of a page, but is very useful towards optimizing cache performance.
Cross-Origin Resource Policy (CORP) - HTTP
Web › HTTP › Cross-Origin Resource Policy (CORP)
cross-origin resource policy is a policy set by the cross-origin-resource-policy http header that lets web sites and applications opt in to protection against certain requests from other origins (such as those issued with elements like <script> and <img>), to mitigate speculative side-channel attacks, like spectre, as well as cross-site script inclusion attacks.
Feature Policy - HTTP
Web › HTTP › Feature Policy
inferring the policy scripts can programatically query information about the feature policy via the featurepolicy object located at either document.featurepolicy or htmliframeelement.featurepolicy.
Content-Disposition - HTTP
Web › HTTP › Headers › Content-Disposition
when dealing with multiple files in the same field (for example, the multiple attribute of an <input type="file"> element), there can be several subparts with the same name.
CSP: frame-ancestors - HTTP
Web › HTTP › Headers › Content-Security-Policy › frame-ancestors
this directive is not supported in the <meta> element.
CSP: plugin-types - HTTP
Web › HTTP › Headers › Content-Security-Policy › plugin-types
instantiation of an <embed>, <object> or <applet> element will fail if: the element to load does not declare a valid mime type, the declared type does not match one of specified types in the plugin-types directive, the fetched resource does not match the declared type.
CSP: report-to - HTTP
Web › HTTP › Headers › Content-Security-Policy › report-to
csp version 1 directive type reporting directive this directive is not supported in the <meta> element.
CSP: report-uri - HTTP
Web › HTTP › Headers › Content-Security-Policy › report-uri
csp version 1 directive type reporting directive this directive is not supported in the <meta> element.
CSP: require-sri-for - HTTP
Web › HTTP › Headers › Content-Security-Policy › require-sri-for
examples if you set your site to require sri for script and styles using this directive: content-security-policy: require-sri-for script style <script> elements like the following will be loaded as they use a valid integrity attribute.
CSP: sandbox - HTTP
Web › HTTP › Headers › Content-Security-Policy › sandbox
csp version 1.1 / 2 directive type document directive this directive is not supported in the <meta> element or by the content-security-policy-report-only header field.
Content-Security-Policy-Report-Only - HTTP
Web › HTTP › Headers › Content-Security-Policy-Report-Only
header type response header forbidden header name no this header is not supported inside a <meta> element.
Content-Type - HTTP
Web › HTTP › Headers › Content-Type
examples content-type in html forms in a post request, resulting from an html form submission, the content-type of the request is specified by the enctype attribute on the <form> element.
X-Frame-Options - HTTP
Web › HTTP › Headers › X-Frame-Options
examples note: setting x-frame-options inside the <meta> element is useless!
HTTP Messages - HTTP
Web › HTTP › Messages
their start-line contain three elements: an http method, a verb (like get, put or post) or a noun (like head or options), that describes the action to be performed.
POST - HTTP
Web › HTTP › Methods › POST
in this case, the content type is selected by putting the adequate string in the enctype attribute of the <form> element or the formenctype attribute of the <input> or <button> elements: application/x-www-form-urlencoded: the keys and values are encoded in key-value tuples separated by '&', with a '=' between the key and the value.
HTTP response status codes - HTTP
Web › HTTP › Status
208 already reported (webdav) used inside a <dav:propstat> response element to avoid repeatedly enumerating the internal members of multiple bindings to the same collection.
HTTP
Web › HTTP
for instance, an html page from domain a (http://domaina.example/) makes a request for an image on domain b (http://domainb.foo/image.jpg) via the img element.
Functions - JavaScript
Web › JavaScript › Guide › Functions
function map(f, a) { let result = []; // create a new array let i; // declare variable for (i = 0; i != a.length; i++) result[i] = f(a[i]); return result; } in the following code, the function receives a function defined by a function expression and executes it for every element of the array received as a second argument.
Meta programming - JavaScript
Web › JavaScript › Guide › Meta programming
the type of each result list element is either string or symbol.
Regular expressions - JavaScript
Web › JavaScript › Guide › Regular Expressions
</p> <form action="#"> <input id="phone"> <button onclick="testinfo(document.getelementbyid('phone'));">check</button> </form> javascript var re = /(?:\d{3}|\(\d{3}\))([-\/\.])\d{3}\1\d{4}/; function testinfo(phoneinput) { var ok = re.exec(phoneinput.value); if (!ok) { console.error(phoneinput.value + ' isn\'t a phone number with area code!'); } else { console.log('thanks, your phone number is ' + ok[0]);} } result tools regexr an online tool to learn, buil...
TypeError: can't access dead object - JavaScript
Web › JavaScript › Reference › Errors › Dead object
a dead object, is holding a strong (keep alive) reference to a dom element that persists even after it was destroyed in the dom.
Warning: JavaScript 1.6's for-each-in loops are deprecated - JavaScript
Web › JavaScript › Reference › Errors › For-each-in loops are deprecated
10 // 20 } or, using for...of (es2015) and object.values (es2017), you can get an array of the specified object values and iterate over the array like this: var object = { a: 10, b: 20 }; for (var x of object.values(object)) { console.log(x); // 10 // 20 } array iteration for each...in has been used to iterate over specified array elements.
RangeError: invalid date - JavaScript
Web › JavaScript › Reference › Errors › Invalid date
examples invalid cases unrecognizable strings or dates containing illegal element values in iso formatted strings usually return nan.
SyntaxError: JSON.parse: bad parsing - JavaScript
Web › JavaScript › Reference › Errors › JSON bad parse
missing a number syntaxerror: json.parse: unexpected end of data syntaxerror: json.parse: unexpected keyword syntaxerror: json.parse: unexpected character syntaxerror: json.parse: end of data while reading object contents syntaxerror: json.parse: expected property name or '}' syntaxerror: json.parse: end of data when ',' or ']' was expected syntaxerror: json.parse: expected ',' or ']' after array element syntaxerror: json.parse: end of data when property name was expected syntaxerror: json.parse: expected double-quoted property name syntaxerror: json.parse: end of data after property name when ':' was expected syntaxerror: json.parse: expected ':' after property name in object syntaxerror: json.parse: end of data after property value in object syntaxerror: json.parse: expected ',' or '}' after pr...
SyntaxError: missing variable name - JavaScript
Web › JavaScript › Reference › Errors › No variable name
var x, y = "foo", var x, = "foo" var first = document.getelementbyid('one'), var second = document.getelementbyid('two'), // syntaxerror: missing variable name the fixed version: var x, y = "foo"; var x = "foo"; var first = document.getelementbyid('one'); var second = document.getelementbyid('two'); arrays array literals in javascript need square brackets around the values.
TypeError: "x" is not a function - JavaScript
Web › JavaScript › Reference › Errors › Not a function
prototype.foreach(), array.prototype.map(), array.prototype.filter(), array.prototype.reduce(), array.prototype.reduceright(), array.prototype.find() when working with map and set objects: map.prototype.foreach() and set.prototype.foreach() examples a typo in the function name in this case, which happens way too often, there is a typo in the method name: let x = document.getelementbyid('foo'); // typeerror: document.getelementbyid is not a function the correct function name is getelementbyid: let x = document.getelementbyid('foo'); function called on the wrong object for certain methods, you have to provide a (callback) function and it will work on specific objects only.
Error: Permission denied to access property "x" - JavaScript
Web › JavaScript › Reference › Errors › Property access denied
this is likely an <iframe> element loaded from a different domain for which you violated the same-origin policy.
TypeError: invalid arguments - JavaScript
Web › JavaScript › Reference › Errors › Typed array invalid arguments
var ta = new uint8array("nope"); // typeerror: invalid arguments different ways to create a valid uint8array: // from a length var uint8 = new uint8array(2); uint8[0] = 42; console.log(uint8[0]); // 42 console.log(uint8.length); // 2 console.log(uint8.bytes_per_element); // 1 // from an array var arr = new uint8array([21,31]); console.log(arr[1]); // 31 // from another typedarray var x = new uint8array([21, 31]); var y = new uint8array(x); console.log(y[0]); // 21 // from an arraybuffer var buffer = new arraybuffer(8); var z = new uint8array(buffer, 1, 4); // from an iterable var iterable = function*(){ yield* [1,2,3]; }(); var uint8 = new uint8array(iterab...
getter - JavaScript
Web › JavaScript › Reference › Functions › get
get notifier() { delete this.notifier; return this.notifier = document.getelementbyid('bookmarked-notification-anchor'); }, for firefox code, see also the xpcomutils.jsm code module, which defines the definelazygetter() function.
Array.prototype[@@iterator]() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › @@iterator
examples iteration using for...of loop html <ul id="letterresult"> </ul> javascript var arr = ['a', 'b', 'c']; var earr = arr[symbol.iterator](); var letterresult = document.getelementbyid('letterresult'); // your browser must support for..of loop // and let-scoped variables in for loops // const and var could also be used for (let letter of earr) { letterresult.innerhtml += "<li>" + letter + "</li>"; } result alternative iteration var arr = ['a', 'b', 'c', 'd', 'e']; var earr = arr[symbol.iterator](); console.log(earr.next().value); // a console.log(earr.next().value); ...
Array.prototype.entries() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › entries
examples iterating with index and element const a = ['a', 'b', 'c']; for (const [index, element] of a.entries()) console.log(index, element); // 0 'a' // 1 'b' // 2 'c' using a for…of loop var a = ['a', 'b', 'c']; var iterator = a.entries(); for (let e of iterator) { console.log(e); } // [0, 'a'] // [1, 'b'] // [2, 'c'] specifications specification ecmascript (ecma-262)the definition of 'array.prototype.
Array.isArray() - JavaScript
Web › JavaScript › Reference › Global Objects › Array › isArray
var iframe = document.createelement('iframe'); document.body.appendchild(iframe); xarray = window.frames[window.frames.length-1].array; var arr = new xarray(1,2,3); // [1,2,3] // correctly checking for array array.isarray(arr); // true // considered harmful, because doesn't work through iframes arr instanceof array; // false specifications specification ecmascript (ecma-262)the definition of 'array.isarray' i...
Atomics.isLockFree() - JavaScript
Web › JavaScript › Reference › Global Objects › Atomics › isLockFree
it returns true, if the given size is one of the bytes_per_element property of integer typedarray types.
Atomics - JavaScript
Web › JavaScript › Reference › Global Objects › Atomics
returns true if an atomic operation on arrays of the given element size will be implemented using a hardware atomic operation (as opposed to a lock).
DataView() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › DataView › DataView
bytelength optional the number of elements in the byte array.
Date.parse() - JavaScript
Web › JavaScript › Reference › Global Objects › Date › parse
unrecognizable strings or dates containing illegal element values in iso formatted strings shall cause date.parse() to return nan.
Function.prototype.bind() - JavaScript
Web › JavaScript › Reference › Global Objects › Function › bind
[[boundarguments]] a list of values whose elements are used as the first arguments to any call to the wrapped function.
Intl​.ListFormat.prototype​.format() - JavaScript
Web › JavaScript › Reference › Global Objects › Intl › ListFormat › format
syntax listformat.format([list]); parameters list an iterable object, such as an array return value a language-specific formatted string representing the elements of the list description the format() method returns a string that has been formatted based on parameters provided in the intl.listformat object.
Intl.Locale.prototype.collation - JavaScript
Web › JavaScript › Reference › Global Objects › Intl › Locale › collation
direct binary code point order (used in hindi) ducet the default unicode collation element table order emoji recommended ordering for emoji characters eor european ordering rules gb2312 pinyin ordering for latin, gb2312han charset ordering for cjk characters (used in chinese) phonebk phonebook style ordering (such as in german) phonetic phonetic ordering (sorting based on pronunciation) pinyin pinyin ordering for l...
Intl.getCanonicalLocales() - JavaScript
Web › JavaScript › Reference › Global Objects › Intl › getCanonicalLocales
duplicates will be omitted and elements will be validated as structurally valid language tags.
Intl - JavaScript
Web › JavaScript › Reference › Global Objects › Intl
multiple locales may be specified (and a best-supported locale determined by evaluating each of them in order and comparing against the locales supported by the implementation) by passing an array (or array-like object, with a length property and corresponding indexed elements) whose elements are either intl.locale objects or values that convert to unicode bcp 47 locale identifier strings.
JSON.stringify() - JavaScript
Web › JavaScript › Reference › Global Objects › JSON › stringify
false]); // '[1,"false",false]' json.stringify([nan, null, infinity]); // '[null,null,null]' json.stringify({ x: 5 }); // '{"x":5}' json.stringify(new date(2006, 0, 2, 15, 4, 5)) // '"2006-01-02t15:04:05.000z"' json.stringify({ x: 5, y: 6 }); // '{"x":5,"y":6}' json.stringify([new number(3), new string('false'), new boolean(false)]); // '[3,"false",false]' // string-keyed array elements are not enumerable and make no sense in json let a = ['foo', 'bar']; a['baz'] = 'quux'; // a: [ 0: 'foo', 1: 'bar', baz: 'quux' ] json.stringify(a); // '["foo","bar"]' json.stringify({ x: [10, undefined, function(){}, symbol('')] }); // '{"x":[10,null,null,null]}' // standard data structures json.stringify([new set([1]), new map([[1, 2]]), new weakset([{a: 1}]), new weakmap([[{a: 1}, 2]])...
JSON - JavaScript
Web › JavaScript › Reference › Global Objects › JSON
pt " or \ or u+0000 through u+001f or escapesequence escapesequence = \" or \/ or \\ or \b or \f or \n or \r or \t or \u hexdigit hexdigit hexdigit hexdigit hexdigit = 0 through 9 or a through f or a through f jsonobject = { } or { members } members = jsonstring : json or members , jsonstring : json jsonarray = [ ] or [ arrayelements ] arrayelements = json or arrayelements , json insignificant whitespace may be present anywhere except within a jsonnumber (numbers must contain no whitespace) or jsonstring (where it is interpreted as the corresponding character in the string, or would cause an error).
Map.prototype.clear() - JavaScript
Web › JavaScript › Reference › Global Objects › Map › clear
the clear() method removes all elements from a map object.
Map.prototype.entries() - JavaScript
Web › JavaScript › Reference › Global Objects › Map › entries
the entries() method returns a new iterator object that contains the [key, value] pairs for each element in the map object in insertion order.
Map.prototype.keys() - JavaScript
Web › JavaScript › Reference › Global Objects › Map › keys
the keys() method returns a new iterator object that contains the keys for each element in the map object in insertion order.
Map.prototype.size - JavaScript
Web › JavaScript › Reference › Global Objects › Map › size
the size accessor property returns the number of elements in a map object.
Map.prototype.values() - JavaScript
Web › JavaScript › Reference › Global Objects › Map › values
the values() method returns a new iterator object that contains the values for each element in the map object in insertion order.
Object.entries() - JavaScript
Web › JavaScript › Reference › Global Objects › Object › entries
description object.entries() returns an array whose elements are arrays corresponding to the enumerable string-keyed property [key, value] pairs found directly upon object.
Object.fromEntries() - JavaScript
Web › JavaScript › Reference › Global Objects › Object › fromEntries
the iterable argument is expected to be an object that implements an @@iterator method, that returns an iterator object, that produces a two element array-like object, whose first element is a value that will be used as a property key, and whose second element is the value to associate with that property key.
Object.getOwnPropertyNames() - JavaScript
Web › JavaScript › Reference › Global Objects › Object › getOwnPropertyNames
description object.getownpropertynames() returns an array whose elements are strings corresponding to the enumerable and non-enumerable properties found directly in a given object obj.
Object.keys() - JavaScript
Web › JavaScript › Reference › Global Objects › Object › keys
description object.keys() returns an array whose elements are strings corresponding to the enumerable properties found directly upon object.
Object.values() - JavaScript
Web › JavaScript › Reference › Global Objects › Object › values
description object.values() returns an array whose elements are the enumerable property values found on the object.
Object - JavaScript
Web › JavaScript › Reference › Global Objects › Object
for example, in the call myfn(a, b, c), the arguments within myfn's body will contain 3 array-like elements corresponding to (a, b, c).
Promise.all() - JavaScript
Web › JavaScript › Reference › Global Objects › Promise › all
be done asynchronously console.log(p); console.log(p2) settimeout(function() { console.log('the stack is now empty'); console.log(p2); }); // logs // promise { <state>: "fulfilled", <value>: array[0] } // promise { <state>: "pending" } // the stack is now empty // promise { <state>: "fulfilled", <value>: array[2] } promise.all fail-fast behaviour promise.all is rejected if any of the elements are rejected.
Promise.any() - JavaScript
Web › JavaScript › Reference › Global Objects › Promise › any
status: ${response.status}`); } else { return response.blob(); } }) } let coffee = fetchanddecode('coffee.jpg'); let tea = fetchanddecode('tea.jpg'); promise.any([coffee, tea]).then(value => { let objecturl = url.createobjecturl(value); let image = document.createelement('img'); image.src = objecturl; document.body.appendchild(image); }) .catch(e => { console.log(e.message); }); specifications specification promise.any ...
RegExp.prototype[@@split]() - JavaScript
Web › JavaScript › Reference › Global Objects › RegExp › @@split
return value an array containing substrings as its elements.
RegExpInstance.lastIndex - JavaScript
Web › JavaScript › Reference › Global Objects › RegExp › lastIndex
console.log(re.exec('hi')); console.log(re.lastindex); returns ["", undefined], an empty array whose zeroth element is the match string.
Set() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › Set › Set
syntax new set([iterable]) parameters iterable optional if an iterable object is passed, all of its elements will be added to the new set.
Set.prototype.clear() - JavaScript
Web › JavaScript › Reference › Global Objects › Set › clear
the clear() method removes all elements from a set object.
Set.prototype.size - JavaScript
Web › JavaScript › Reference › Global Objects › Set › size
the size accessor property returns the number of (unique) elements in a set object.
String.fromCodePoint() - JavaScript
Web › JavaScript › Reference › Global Objects › String › fromCodePoint
int >> 10) + 0xd800, // highsurrogate (codepoint % 0x400) + 0xdc00 // lowsurrogate ); } if (codelen >= 0x3fff) { result += stringfromcharcode.apply(null, codeunits); codeunits.length = 0; } } return result + stringfromcharcode.apply(null, codeunits); }; try { // ie 8 only supports `object.defineproperty` on dom elements object.defineproperty(string, "fromcodepoint", { "value": fromcodepoint, "configurable": true, "writable": true }); } catch(e) { string.fromcodepoint = fromcodepoint; } }(string.fromcharcode)); examples using fromcodepoint() valid input: string.fromcodepoint(42); // "*" string.fromcodepoint(65, 90); // "az" string.fromcodepoint(0x404); // "\u0404...
String length - JavaScript
Web › JavaScript › Reference › Global Objects › String › length
7) established a maximum length of 2^53 - 1 elements.
String.prototype.match() - JavaScript
Web › JavaScript › Reference › Global Objects › String › match
all letters a through e and a through e are returned, each its own element in the array.
String.prototype.toLocaleLowerCase() - JavaScript
Web › JavaScript › Reference › Global Objects › String › toLocaleLowerCase
a typeerror ("invalid element in locales argument") is thrown if an array element isn't of type string.
String.prototype.toLocaleUpperCase() - JavaScript
Web › JavaScript › Reference › Global Objects › String › toLocaleUpperCase
a typeerror ("invalid element in locales argument") is thrown if an array element isn't of type string.
String - JavaScript
Web › JavaScript › Reference › Global Objects › String
string.prototype.repeat(count) returns a string consisting of the elements of the object repeated count times.
Symbol.toStringTag - JavaScript
Web › JavaScript › Reference › Global Objects › Symbol › toStringTag
for example, to acccess the symbol.tostringtag property on htmlbuttonelement: let test = document.createelement('button'); test.tostring(); // returns [object htmlbuttonelement] test[symbol.tostringtag]; // returns htmlbuttonelement specifications specification ecmascript (ecma-262)the definition of 'symbol.tostringtag' in that specification.
Symbol - JavaScript
Web › JavaScript › Reference › Global Objects › Symbol
symbol.isconcatspreadable a boolean value indicating if an object should be flattened to its array elements.
TypedArray.prototype.length - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › length
the length accessor property represents the length (in elements) of a typed array.
TypedArray.name - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › name
property attributes of typedarray.name writable no enumerable no configurable no description typedarray objects differ from each other in the number of bytes per element and in the way the bytes are interpreted.
TypedArray.prototype.reverse() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › reverse
the first typed array element becomes the last and the last becomes the first.
TypedArray.prototype.sort() - JavaScript
Web › JavaScript › Reference › Global Objects › TypedArray › sort
the sort() method sorts the elements of a typed array numerically in place and returns the typed array.
WeakMap() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › WeakMap › WeakMap
syntax new weakmap([iterable]) parameters iterable iterable is an array or other iterable object whose elements are key-value pairs (2-element arrays).
WeakMap.prototype.clear() - JavaScript
Web › JavaScript › Reference › Global Objects › WeakMap › clear
the clear() method used to remove all elements from a weakmap object, but is no longer part of ecmascript and its implementations.
WeakMap - JavaScript
Web › JavaScript › Reference › Global Objects › WeakMap
setting elements on this map would involve pushing a key and value onto the end of each of those arrays simultaneously.
WeakRef() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › WeakRef › WeakRef
class counter { constructor(element) { // remember a weak reference to a dom element this.ref = new weakref(element); this.start(); } } specifications specification weakrefsthe definition of 'weakref constructor' in that specification.
WeakRef.prototype.deref() - JavaScript
Web › JavaScript › Reference › Global Objects › WeakRef › deref
const tick = () => { // get the element from the weak reference, if it still exists const element = this.ref.deref(); if (element) { element.textcontent = ++this.count; } else { // the element doesn't exist anymore console.log("the element is gone."); this.stop(); this.ref = null; } }; specifications specification weakrefsthe definition of 'weakref.prototype.deref()' in that specifica...
WeakSet() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › WeakSet › WeakSet
syntax new weakset([iterable]); parameters iterable if an iterable object is passed, all of its elements will be added to the new weakset.
WeakSet.prototype.clear() - JavaScript
Web › JavaScript › Reference › Global Objects › WeakSet › clear
the clear() method used to remove all elements from a weakset object, but is no longer part of ecmascript and its implementations.
WeakSet.prototype.has() - JavaScript
Web › JavaScript › Reference › Global Objects › WeakSet › has
return value boolean returns true if an element with the specified value exists in the weakset object; otherwise false.
WebAssembly.Global() constructor - JavaScript
Web › JavaScript › Reference › Global Objects › WebAssembly › Global › Global
const output = document.getelementbyid('output'); function asserteq(msg, got, expected) { output.innerhtml += `testing ${msg}: `; if (got !== expected) output.innerhtml += `fail!<br>got: ${got}<br>expected: ${expected}<br>`; else output.innerhtml += `success!
WebAssembly.Global - JavaScript
Web › JavaScript › Reference › Global Objects › WebAssembly › Global
const output = document.getelementbyid('output'); function asserteq(msg, got, expected) { output.innerhtml += `testing ${msg}: `; if (got !== expected) output.innerhtml += `fail!<br>got: ${got}<br>expected: ${expected}<br>`; else output.innerhtml += `success!
WebAssembly.Table.prototype.set() - JavaScript
Web › JavaScript › Reference › Global Objects › WebAssembly › Table › set
var tbl = new webassembly.table({initial:2, element:"anyfunc"}); console.log(tbl.length); console.log(tbl.get(0)); console.log(tbl.get(1)); we then create an import object that contains a reference to the table: var importobj = { js: { tbl:tbl } }; finally, we load and instantiate a wasm module (table2.wasm) using the webassembly.instantiatestreaming(), log the table length, and invoke the two referenced functions that are now stored in...
Standard built-in objects - JavaScript
Web › JavaScript › Reference › Global Objects
the iterable collections (map and set) contain elements which are easily iterated in the order of insertion.
Iteration protocols - JavaScript
Web › JavaScript › Reference › Iteration protocols
spread syntax—use the same iteration protocol under the hood: console.log([...somestring]); // ["h", "i"] you can redefine the iteration behavior by supplying our own @@iterator: // need to construct a string object explicitly to avoid auto-boxing let somestring = new string('hi'); somestring[symbol.iterator] = function () { return { // this is the iterator object, returning a single element (the string "bye") next: function () { return this._first ?
Lexical grammar - JavaScript
Web › JavaScript › Reference › Lexical grammar
the source text of ecmascript scripts gets scanned from left to right and is converted into a sequence of input elements which are tokens, control characters, line terminators, comments or white space.
Logical OR assignment (||=) - JavaScript
Web › JavaScript › Reference › Operators › Logical OR assignment
examples setting default content if the "lyrics" element is empty, set the innerhtml to a default value: document.getelementbyid('lyrics').innerhtml ||= '<i>no lyrics.</i>' here the short-circuit is especially beneficial, since the element will not be updated unnecessarily and won't cause unwanted side-effects such as additional parsing or rendering work, or loss of focus, etc.
instanceof - JavaScript
Web › JavaScript › Reference › Operators › instanceof
for instance, you can securely check if a given object is, in fact, an array using array.isarray(myobj) for example, checking if a nodes is a svgelement in a different context, you can use mynode instanceof mynode.ownerdocument.defaultview.svgelement.
Expressions and operators - JavaScript
Web › JavaScript › Reference › Operators
...obj spread syntax allows an expression to be expanded in places where multiple arguments (for function calls) or multiple elements (for array literals) are expected.
export - JavaScript
Web › JavaScript › Reference › Statements › export
rt { cube, foo, graph }; then in the top-level module included in your html page, we could have: import { cube, foo, graph } from './my-module.js'; graph.options = { color:'blue', thickness:'3px' }; graph.draw(); console.log(cube(3)); // 27 console.log(foo); // 4.555806215962888 it is important to note the following: you need to include this script in your html with a <script> element of type="module", so that it gets recognised as a module and dealt with appropriately.
for...in - JavaScript
Web › JavaScript › Reference › Statements › for...in
because the order of iteration is implementation-dependent, iterating over an array may not visit elements in a consistent order.
Transitioning to strict mode - JavaScript
Web › JavaScript › Reference › Strict mode › Transitioning to strict mode
the only legitimate use case would be to reuse a function as in: // example taken from vanillajs: http://vanilla-js.com/ var s = document.getelementbyid('thing').style; s.opacity = 1; (function() { if ((s.opacity-=.1) < 0) s.display = 'none'; else settimeout(arguments.callee, 40); })(); which can be rewritten as: 'use strict'; var s = document.getelementbyid('thing').style; s.opacity = 1; (function fadeout() { // name the function if((s.opacity-=.1) < 0) s.display = 'none'; else settimeout(fadeout, 40); // use the na...
Template literals (Template strings) - JavaScript
Web › JavaScript › Reference › Template literals
they will show up as undefined element in the “cooked” array: function latex(str) { return { "cooked": str[0], "raw": str.raw[0] } } latex`\unicode` // { cooked: undefined, raw: "\\unicode" } note that the escape sequence restriction is only dropped from tagged templates—not from untagged template literals: let bad = `bad escape sequence: \unicode`; specifications specification ecmascript (ecma-262...
JavaScript typed arrays - JavaScript
Web › JavaScript › Typed arrays
a view provides a context — that is, a data type, starting offset, and the number of elements — that turns the data into a typed array.
Web app manifests
Web › Manifest
/homescreen168.png", "sizes": "168x168", "type": "image/png" }, { "src": "images/touch/homescreen192.png", "sizes": "192x192", "type": "image/png" }], "related_applications": [{ "platform": "play", "url": "https://play.google.com/store/apps/details?id=cheeaun.hackerweb" }] } deploying a manifest web app manifests are deployed in your html pages using a <link> element in the <head> of a document: <link rel="manifest" href="/manifest.webmanifest"> note: the .webmanifest extension is specified in the media type registration section of the specification (the response of the manifest file should return content-type: application/manifest+json).
<merror> - MathML
Web › MathML › Element › merror
the mathml <merror> element is used to display contents as error messages.
<mfrac> - MathML
Web › MathML › Element › mfrac
the mathml <mfrac> element is used to display fractions.
<mi> - MathML
Web › MathML › Element › mi
the mathml <mi> element indicates that the content should be rendered as an identifier such as function names, variables or symbolic constants.
<mn> - MathML
Web › MathML › Element › mn
the mathml <mn> element represents a numeric literal which is normally a sequence of digits with a possible separator (a dot or a comma).
<mover> - MathML
Web › MathML › Element › mover
the mathml <mover> element is used to attach an accent or a limit over an expression.
<mpadded> - MathML
Web › MathML › Element › mpadded
the mathml <mpadded> element is used to add extra padding and to set the general adjustment of position and size of enclosed contents.
<mphantom> - MathML
Web › MathML › Element › mphantom
the mathml <mphantom> element is rendered invisibly, but dimensions (such as height, width, and baseline position) are still kept.
<mroot> - MathML
Web › MathML › Element › mroot
the mathml <mroot> element is used to display roots with an explicit index.
<mspace> - MathML
Web › MathML › Element › mspace
the mathml <mspace> element is used to display a blank space, whose size is set by its attributes.
<msqrt> - MathML
Web › MathML › Element › msqrt
the mathml <msqrt> element is used to display square roots (no index is displayed).
<msub> - MathML
Web › MathML › Element › msub
the mathml <msub> element is used to attach a subscript to an expression.
<msubsup> - MathML
Web › MathML › Element › msubsup
the mathml <msubsup> element is used to attach both a subscript and a superscript, together, to an expression.
<msup> - MathML
Web › MathML › Element › msup
the mathml <msup> element is used to attach a superscript to an expression.
<mtext> - MathML
Web › MathML › Element › mtext
the mathml <mtext> element is used to render arbitrary text with no notational meaning, such as comments or annotations.
<munderover> - MathML
Web › MathML › Element › munderover
the mathml <munderover> element is used to attach accents or limits both under and over an expression.
Handling media support issues in web content - Web media technologies
Web › Media › Formats › Support issues
specifying multiple sources checking compatibility in javascript htmlmediaelement.canplaytype and mediasource.istypesupported...
The "codecs" parameter in common media types - Web media technologies
Web › Media › Formats › codecs parameter
firstly, you can use it with the <source> element when creating an <audio> or <video> element, in order to establish a group of options for the browser to choose from when selecting the format of the media to present to the user in the element.
Performance budgets - Web Performance
Web › Performance › Performance budgets
time to hero element), or a threshold over a period of time.
Add to Home screen - Progressive web apps (PWAs)
Web › Progressive web apps › Add to home screen
to make it feel like a distinct app (and not just a web page), you should choose a value such as fullscreen (no ui is shown at all) or standalone (very similar, but system-level ui elements such as the status bar might be visible).
How to make PWAs installable - Progressive web apps (PWAs)
Web › Progressive web apps › Installable PWAs
the manifest file the key element is a web manifest file, which lists all the information about the website in a json format.
accent-height - SVG: Scalable Vector Graphics
Web › SVG › Attribute › accent-height
only one element is using this attribute: <font-face> font-face for <font-face>, accent-height defines the distance from the origin to the top of accent characters, measured by a distance within the font coordinate system.
additive - SVG: Scalable Vector Graphics
Web › SVG › Attribute › additive
four elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, and <animatetransform> usage notes value replace | sum default value replace animatable no sum specifies that the animation will add to the underlying value of the attribute and other lower priority animations.
alphabetic - SVG: Scalable Vector Graphics
Web › SVG › Attribute › alphabetic
only one element is using this attribute: <font-face> usage notes value <number> default value 0 animatable no specifications specification status comment scalable vector graphics (svg) 1.1 (second edition)the definition of 'alphabetic' in that specification.
arabic-form - SVG: Scalable Vector Graphics
Web › SVG › Attribute › arabic-form
only one element is using this attribute: <glyph> context notes value initial | medial | terminal | isolated default value isolated animatable no initial this value indicates that the glyph represents the initial form.
ascent - SVG: Scalable Vector Graphics
Web › SVG › Attribute › ascent
only one element is using this attribute: <font-face> font-face for <font-face>, ascent defines the maximum unaccented height of the font within the font coordinate system.
azimuth - SVG: Scalable Vector Graphics
Web › SVG › Attribute › azimuth
only one element is using this attribute: <fedistantlight> html, body, svg { height: 100%; } <svg viewbox="0 0 440 200" xmlns="http://www.w3.org/2000/svg"> <filter id="distantlight1"> <fediffuselighting> <fedistantlight azimuth="0" /> </fediffuselighting> </filter> <filter id="distantlight2"> <fediffuselighting> <fedistantlight azimuth="240" /> </fediffuselighting> </filter> <circle cx="100" cy="100" r="80" style="filter: url(#distantlight1);" /> <circle cx="100" cy="100" r="80" style="filter: url(#distantlight2); transform: translatex(240px);" /> </svg> usage notes value <number> default value...
baseFrequency - SVG: Scalable Vector Graphics
Web › SVG › Attribute › baseFrequency
only one element is using this attribute: <feturbulence> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="noise1" x="0" y="0" width="100%" height="100%"> <feturbulence basefrequency="0.025" /> </filter> <filter id="noise2" x="0" y="0" width="100%" height="100%"> <feturbulence basefrequency="0.05" /> </filter> <rect x="0" y="0" width="200" height="200" style="filter: url(#noise1);" /> <rect x="0" y="0" width="200" height="200" style="filter: url(#noise2); transform: translatex(220px);" /> </svg> usage notes value <number-optional-number> default value ...
baseProfile - SVG: Scalable Vector Graphics
Web › SVG › Attribute › baseProfile
only one element is using this attribute: <svg> context notes value profile name default value none animatable no example <svg width="120" height="120" version="1.1" xmlns="http://www.w3.org/2000/svg" baseprofile="full"> ...
bbox - SVG: Scalable Vector Graphics
Web › SVG › Attribute › bbox
only one element is using this attribute: <font-face> usage notes value <string> default value none animatable no <string> a comma-separated list of exactly four numbers specifying, in order, the lower left x, lower left y, upper right x, and upper right y of the bounding box for the complete font.
bias - SVG: Scalable Vector Graphics
Web › SVG › Attribute › bias
after applying the kernelmatrix of the <feconvolvematrix> element to the input image to yield a number and applied the divisor attribute, the bias attribute is added to each component.
by - SVG: Scalable Vector Graphics
Web › SVG › Attribute › by
four elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, and <animatetransform> html, body, svg { height: 100%; } <svg viewbox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"> <rect x="10" y="10" width="100" height="100"> <animate attributename="width" fill="freeze" by="50" dur="3s"/> </rect> </svg> usage notes value see below default value none animatable no the exact value type for this attribute depends on the value of the attribute that will b...
calcMode - SVG: Scalable Vector Graphics
Web › SVG › Attribute › calcMode
four elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, and <animatetransform> usage notes value discrete | linear | paced | spline default value linear animatable no discrete this specifies that the animation function will jump from one value to the next without any interpolation.
cap-height - SVG: Scalable Vector Graphics
Web › SVG › Attribute › cap-height
only one element is using this attribute: <font-face> usage notes value <number> default value none animatable no specifications specification status comment scalable vector graphics (svg) 1.1 (second edition)the definition of 'cap-height' in that specification.
color-interpolation-filters - SVG: Scalable Vector Graphics
Web › SVG › Attribute › color-interpolation-filters
as a presentation attribute, it can be applied to any element but it only has an effect on the following eighteen elements: <fespotlight>, <feblend>, <fecolormatrix>, <fecomponenttransfer>, <fecomposite>, <feconvolvematrix>, <fediffuselighting>, <fedisplacementmap>, <fedropshadow>, <feflood>, <fegaussianblur>, <feimage>, <femerge>, <femorphology>, <feoffset>, <fespecularlighting>, <fetile>, <feturbulence> usage notes value auto | srgb | linear...
color-rendering - SVG: Scalable Vector Graphics
Web › SVG › Attribute › color-rendering
as a presentation attribute, it can be applied to any element but it only has an effect on the following 29 elements: <a>, <animate>, <animatecolor>, <circle>, <clippath>, <defs>, <ellipse>, <foreignobject>, <g>, <glyph>, <image>, <line>, <lineargradient>, <marker>, <mask>, <missing-glyph>, <path>, <pattern>, <polygon>, <polyline>, <radialgradient>, <rect>, <svg>, <switch>, <symbol>, <text>, <textpath>, <tspan>, and <use> html, body, svg { height: 100%...
contentScriptType - SVG: Scalable Vector Graphics
Web › SVG › Attribute › contentScriptType
the contentscripttype attribute specifies the default scripting language for the given document fragment on the <svg> element.
cx - SVG: Scalable Vector Graphics
Web › SVG › Attribute › cx
three elements are using this attribute: <circle>, <ellipse>, and <radialgradient> html,body,svg { height:100% } <svg viewbox="0 0 300 100" xmlns="http://www.w3.org/2000/svg"> <radialgradient cx="25%" id="mygradient"> <stop offset="0" stop-color="white" /> <stop offset="100%" stop-color="black" /> </radialgradient> <circle cx="50" cy="50" r="45"/> <ellipse cx="150" cy="50" rx="45" ry="25" /> <rect x="205" y="5" width="90" height="90" fill="url(#mygradient)" /> </svg> circle for <circle>, cx defines the x-axis coordinate of the center of the shape.
cy - SVG: Scalable Vector Graphics
Web › SVG › Attribute › cy
three elements are using this attribute: <circle>, <ellipse>, and <radialgradient> html,body,svg { height:100% } <svg viewbox="0 0 100 300" xmlns="http://www.w3.org/2000/svg"> <radialgradient cy="25%" id="mygradient"> <stop offset="0" stop-color="white" /> <stop offset="100%" stop-color="black" /> </radialgradient> <circle cy="50" cx="50" r="45"/> <ellipse cy="150" cx="50" rx="45" ry="25" /> <rect x="5" y="205" width="90" height="90" fill="url(#mygradient)" /> </svg> circle for <circle>, cy defines the y-axis coordinate of the center of the shape.
descent - SVG: Scalable Vector Graphics
Web › SVG › Attribute › descent
only one element is using this attribute: <font-face> usage notes value <number> default value value of vert-origin-y animatable no specifications specification status comment scalable vector graphics (svg) 1.1 (second edition)the definition of 'descent' in that specification.
diffuseConstant - SVG: Scalable Vector Graphics
Web › SVG › Attribute › diffuseConstant
only one element is using this attribute: <fediffuselighting> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="diffuselighting1" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic" diffuseconstant="1"> <fepointlight x="60" y="60" z="20" /> </fediffuselighting> </filter> <filter id="diffuselighting2" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic" diffuseconstant="2"> <fepointlight x="60" y...
edgeMode - SVG: Scalable Vector Graphics
Web › SVG › Attribute › edgeMode
two elements are using this attribute: <feconvolvematrix> and <fegaussianblur> feconvolvematrix for <feconvolvematrix>, edgemode determines how to extend the input image as necessary with color values so that the matrix operations can be applied when the kernel is positioned at or near the edge of the input image.
elevation - SVG: Scalable Vector Graphics
Web › SVG › Attribute › elevation
only one element is using this attribute: <fedistantlight> html, body, svg { height: 100%; } <svg viewbox="0 0 440 200" xmlns="http://www.w3.org/2000/svg"> <filter id="distantlight1"> <fediffuselighting> <fedistantlight elevation="0" /> </fediffuselighting> </filter> <filter id="distantlight2"> <fediffuselighting> <fedistantlight elevation="45" /> </fediffuselighting> </filter> <circle cx="100" cy="100" r="80" style="filter: url(#distantlight1);" /> <circle cx="100" cy="100" r="80" style="filter: url(#distantlight2); transform: translatex(240px);" /> </s...
fill-opacity - SVG: Scalable Vector Graphics
Web › SVG › Attribute › fill-opacity
as a presentation attribute, it can be applied to any element but it has effect only on the following eleven elements: <altglyph>, <circle>, <ellipse>, <path>, <polygon>, <polyline>, <rect>, <text>, <textpath>, <tref>, and <tspan> html,body,svg { height:100% } <svg viewbox="0 0 400 100" xmlns="http://www.w3.org/2000/svg"> <!-- default fill opacity: 1 --> <circle cx="50" cy="50" r="40" /> <!-- fill opacity as a number --> <circle cx="150" cy="50" r="40" fill-opacity="0.7" /> <!-- fill opacity as a percentage --> <circle cx="250" cy="50" r="40" ...
fill-rule - SVG: Scalable Vector Graphics
Web › SVG › Attribute › fill-rule
as a presentation attribute, it can be applied to any element but it has effect only on the following eight elements: <altglyph>, <path>, <polygon>, <polyline>, <text>, <textpath>, <tref>, and <tspan> html,body,svg { height:100% } <svg viewbox="-10 -10 220 120" xmlns="http://www.w3.org/2000/svg"> <!-- default value for fill-rule --> <polygon fill-rule="nonzero" stroke="red" points="50,0 21,90 98,35 2,35 79,90"/> <!-- the center of the shape has two path segments (shown by the red stroke) between it and infinity.
flood-color - SVG: Scalable Vector Graphics
Web › SVG › Attribute › flood-color
as a presentation attribute, it can be applied to any element but it has effect only on the following two elements: <feflood> and <fedropshadow> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="flood1"> <feflood flood-color="skyblue" x="0" y="0" width="200" height="200"/> </filter> <filter id="flood2"> <feflood flood-color="seagreen" x="0" y="0" width="200" height="200"/> </filter> <rect x="0" y="0" width="200" height="200" style="filter: url(#flood1);" /> <rect x="0" y="0" width="200" height="200" style="filter: url(#flood2); tr...
flood-opacity - SVG: Scalable Vector Graphics
Web › SVG › Attribute › flood-opacity
as a presentation attribute, it can be applied to any element but it has effect only on the following two elements: <feflood> and <fedropshadow> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="flood1"> <feflood flood-color="seagreen" flood-opacity="1" x="0" y="0" width="200" height="200"/> </filter> <filter id="flood2"> <feflood flood-color="seagreen" flood-opacity="0.3" x="0" y="0" width="200" height="200"/> </filter> <rect x="0" y="0" width="200" height="200" style="filter: url(#flood1);" /> <rect x="0" y="0" width="2...
font-family - SVG: Scalable Vector Graphics
Web › SVG › Attribute › font-family
as a presentation attribute, it can be applied to any element but it has effect only on the following eight elements: <altglyph>, <text>, <textpath>, <tref>, and <tspan> html, body, svg { height: 100%; } <svg viewbox="0 0 200 30" xmlns="http://www.w3.org/2000/svg"> <text y="20" font-family="arial, helvetica, sans-serif">sans serif</text> <text x="100" y="20" font-family="monospace">monospace</text> </svg> usage notes value [ <family-name> | <generic-family> ]#where <fam...
font-size - SVG: Scalable Vector Graphics
Web › SVG › Attribute › font-size
as a presentation attribute, it can be applied to any element but it has effect only on the following eight elements: <altglyph>, <text>, <textpath>, <tref>, and <tspan> html, body, svg { height: 100%; } <svg viewbox="0 0 200 30" xmlns="http://www.w3.org/2000/svg"> <text y="20" font-size="smaller">smaller</text> <text x="100" y="20" font-size="2em">2em</text> </svg> usage notes value <absolute-size> | <relative-size> | <length-percentage> default value medium anim...
font-stretch - SVG: Scalable Vector Graphics
Web › SVG › Attribute › font-stretch
as a presentation attribute, it can be applied to any element but it has effect only on the following eight elements: <altglyph>, <text>, <textpath>, <tref>, and <tspan> usage notes value <font-stretch-absolute>where <font-stretch-absolute> = normal | ultra-condensed | extra-condensed | condensed | semi-condensed | semi-expanded | expanded | extra-expanded | ultra-expanded | <percentage> default value normal animatable yes specifications specification status comment cs...
font-style - SVG: Scalable Vector Graphics
Web › SVG › Attribute › font-style
as a presentation attribute, it can be applied to any element but only has an effect on the following five elements: <altglyph>, <text>, <textpath>, <tref>, and <tspan> html, body, svg { height: 100%; } <svg viewbox="0 0 250 30" xmlns="http://www.w3.org/2000/svg"> <text y="20" font-style="normal">normal font style</text> <text x="150" y="20" font-style="italic">italic font style</text> </svg> usage notes value normal | italic | oblique default value normal animatable yes for a description of the va...
font-variant - SVG: Scalable Vector Graphics
Web › SVG › Attribute › font-variant
as a presentation attribute, it can be applied to any element but it has effect only on the following eight elements: <altglyph>, <text>, <textpath>, <tref>, and <tspan> html, body, svg { height: 100%; } <svg viewbox="0 0 250 30" xmlns="http://www.w3.org/2000/svg"> <text y="20" font-variant="normal">normal text</text> <text x="100" y="20" font-variant="small-caps">small-caps text</text> </svg> usage notes value normal | none | [ <common-lig-values> || <discretionary-lig-values> || <historical-lig-values> || <contextual...
font-weight - SVG: Scalable Vector Graphics
Web › SVG › Attribute › font-weight
as a presentation attribute, it can be applied to any element but it has effect only on the following eight elements: <altglyph>, <text>, <textpath>, <tref>, and <tspan> html, body, svg { height: 100%; } <svg viewbox="0 0 200 30" xmlns="http://www.w3.org/2000/svg"> <text y="20" font-weight="normal">normal text</text> <text x="100" y="20" font-weight="bold">bold text</text> </svg> usage notes value normal | bold | bolder | lighter | <number> default value normal animat...
format - SVG: Scalable Vector Graphics
Web › SVG › Attribute › format
two elements are using this attribute: <altglyph> and <glyphref> context notes value <string> default value none animatable no <string> this value specifies the format of the given font.
fr - SVG: Scalable Vector Graphics
Web › SVG › Attribute › fr
only one element is using this attribute: <radialgradient> html, body, svg { height: 100%; } <svg viewbox="0 0 480 200" xmlns="http://www.w3.org/2000/svg"> <defs> <radialgradient id="gradient1" cx="0.5" cy="0.5" r="0.5" fx="0.35" fy="0.35" fr="5%"> <stop offset="0%" stop-color="white"/> <stop offset="100%" stop-color="darkseagreen"/> </radialgradient> <radialgradient id="gradient2" cx="0.5" cy="0.5" r="0.5" fx="0.35" fy="0.35" fr="25%"> <stop offset="0%" stop-color="white"/> <stop offset="100%" stop-color="darkseagreen"/> </radialgradient> </defs> <circle cx="100" cy="100" r="100" fill="url(#gradient1)" /> <circle cx="100" cy="100" r="100" fill=...
from - SVG: Scalable Vector Graphics
Web › SVG › Attribute › from
four elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, and <animatetransform> html, body, svg { height: 100%; } <svg viewbox="0 0 200 200" xmlns="http://www.w3.org/2000/svg"> <rect x="10" y="10" height="100"> <animate attributename="width" fill="freeze" from="100" to="150" dur="3s"/> </rect> </svg> usage notes value see below default value none animatable n...
g1 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › g1
two elements are using this attribute: <hkern> and <vkern> context notes value <name># default value none animatable no <name># this value indicates a comma-separated sequence of glyph names (i.e., values that match glyph-name attributes on <glyph> elements) which identify a set of possible first glyphs in the kerning pair.
g2 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › g2
two elements are using this attribute: <hkern> and <vkern> context notes value <name># default value none animatable no <name># this value indicates a comma-separated sequence of glyph names (i.e., values that match glyph-name attributes on <glyph> elements) which identify a set of possible second glyphs in the kerning pair.
glyph-orientation-horizontal - SVG: Scalable Vector Graphics
Web › SVG › Attribute › glyph-orientation-horizontal
as a presentation attribute, it can be applied to any element but it has effect only on the following five elements: <altglyph>, <textpath>, <text>, <tref>, and <tspan> context notes value <angle> default value 0deg animatable no <angle> the value of the angle is restricted to 0, 90, 180, and 270 degrees.
glyph-orientation-vertical - SVG: Scalable Vector Graphics
Web › SVG › Attribute › glyph-orientation-vertical
as a presentation attribute, it can be applied to any element but it has effect only on the following five elements: <altglyph>, <textpath>, <text>, <tref>, and <tspan> context notes value auto | <angle> default value auto animatable no auto fullwidth ideographic and fullwidth latin text will be set with a glyph orientation of 0 degrees.
glyphRef - SVG: Scalable Vector Graphics
Web › SVG › Attribute › glyphRef
two elements are using this attribute: <altglyph> and <glyphref> usage notes value <string> default value none animatable yes <string> this value represents the glyph identifier.
gradientTransform - SVG: Scalable Vector Graphics
Web › SVG › Attribute › gradientTransform
two elements are using this attribute: <lineargradient> and <radialgradient> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <radialgradient id="gradient1" gradientunits="userspaceonuse" cx="100" cy="100" r="100" fx="100" fy="100"> <stop offset="0%" stop-color="darkblue" /> <stop offset="50%" stop-color="skyblue" /> <stop offset="100...
hanging - SVG: Scalable Vector Graphics
Web › SVG › Attribute › hanging
only one element is using this attribute: <font-face> usage notes value <number> default value none animatable no <number> this value indicates the alignment coordinate for the glyphs.
horiz-origin-x - SVG: Scalable Vector Graphics
Web › SVG › Attribute › horiz-origin-x
only one element is using this attribute: <font> usage notes value <number> default value 0 animatable no <number> this value indicates the x-coordinate of the origin of a glyph for horizontally oriented text.
horiz-origin-y - SVG: Scalable Vector Graphics
Web › SVG › Attribute › horiz-origin-y
only one element is using this attribute: <font> usage notes value <number> default value 0 animatable no <number> this value indicates the x-coordinate of the origin of a glyph for horizontally oriented text.
ideographic - SVG: Scalable Vector Graphics
Web › SVG › Attribute › ideographic
only one element is using this attribute: <font-face> usage notes value <number> default value none animatable no <number> this value indicates the alignment coordinate for the glyphs.
image-rendering - SVG: Scalable Vector Graphics
Web › SVG › Attribute › image-rendering
as a presentation attribute, it can be applied to any element but it has effect only on the following element: <image> usage notes value auto | optimizespeed | optimizequality default value auto animatable yes auto indicates that the user agent shall make appropriate tradeoffs to balance speed and quality, but quality shall be given more importance than speed.
in2 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › in2
three elements use this attribute: <feblend>, <fecomposite> and <fedisplacementmap>.
intercept - SVG: Scalable Vector Graphics
Web › SVG › Attribute › intercept
four elements are using this attribute: <fefunca>, <fefuncb>, <fefuncg>, and <fefuncr> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <defs> <lineargradient id="gradient" gradientunits="userspaceonuse" x1="0" y1="0" x2="200" y2="0"> <stop offset="0" stop-color="#ff0000" /> <stop offset="0.5" stop-color="#00ff00" /> <stop offset="1" stop-color="#0000ff" /> </lineargradient> </defs> <filter id="componenttransfer1" x="0" y="0" width="100%" height="100%"> <fecomponenttransfer> <fefuncr type="linear" intercept="0"/> <fefuncg type="linear" intercept="...
k - SVG: Scalable Vector Graphics
Web › SVG › Attribute › k
two elements are using this attribute: <hkern> and <vkern> context notes value <number> default value none animatable no <number> this value indicates the amount for decreasing the spacing between the two glyphs in the kerning pair.
k1 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › k1
the pixel composition is computed using the following formula: result = k1*i1*i2 + k2*i1 + k3*i2 + k4 only one element is using this attribute: <fecomposite> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="composite1" x="0" y="0" width="100%" height="100%"> <fecomposite in2="sourcegraphic" operator="arithmetic" k1="1" k2="0" k3="0" k4="0" /> </filter> <filter id="composite2" x="0" y="0" width="100%" height="100%"> <fecomposite in2="sourcegraphic" operator="arithmetic" k1="10" k2="0" k3="0" k4="0" /> </filter> <image href="https://mdn.mozillademos.org/files/12668/mdn.svg" x="0" y="...
k2 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › k2
the pixel composition is computed using the following formula: result = k1*i1*i2 + k2*i1 + k3*i2 + k4 only one element is using this attribute: <fecomposite> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="composite1" x="0" y="0" width="100%" height="100%"> <fecomposite in2="sourcegraphic" operator="arithmetic" k1="1" k2="1" k3="0" k4="0" /> </filter> <filter id="composite2" x="0" y="0" width="100%" height="100%"> <fecomposite in2="sourcegraphic" operator="arithmetic" k1="1" k2="10" k3="0" k4="0" /> </filter> <image href="https://mdn.mozillademos.org/files/12668/mdn.svg" x="0" y="...
k3 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › k3
the pixel composition is computed using the following formula: result = k1*i1*i2 + k2*i1 + k3*i2 + k4 only one element is using this attribute: <fecomposite> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="composite1" x="0" y="0" width="100%" height="100%"> <fecomposite in2="sourcegraphic" operator="arithmetic" k1="1" k2="0" k3="1" k4="0" /> </filter> <filter id="composite2" x="0" y="0" width="100%" height="100%"> <fecomposite in2="sourcegraphic" operator="arithmetic" k1="1" k2="0" k3="10" k4="0" /> </filter> <image href="https://mdn.mozillademos.org/files/12668/mdn.svg" x="0" y="...
k4 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › k4
the pixel composition is computed using the following formula: result = k1*i1*i2 + k2*i1 + k3*i2 + k4 only one element is using this attribute: <fecomposite> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="composite1" x="0" y="0" width="100%" height="100%"> <fecomposite in2="sourcegraphic" operator="arithmetic" k1="1" k2="0" k3="0" k4="0" /> </filter> <filter id="composite2" x="0" y="0" width="100%" height="100%"> <fecomposite in2="sourcegraphic" operator="arithmetic" k1="10" k2="0" k3="0" k4="0.3" /> </filter> <image href="https://mdn.mozillademos.org/files/12668/mdn.svg" x="0" y...
kernelUnitLength - SVG: Scalable Vector Graphics
Web › SVG › Attribute › kernelUnitLength
three elements are using this attribute: <feconvolvematrix>, <fediffuselighting>, and <fespecularlighting> feconvolvematrix for the <feconvolvematrix>, kernelunitlength indicates the intended distance in current filter units (i.e., units as determined by the value of primitiveunits attribute) between successive columns and rows, respectively, in the kernelmatrix.
kerning - SVG: Scalable Vector Graphics
Web › SVG › Attribute › kerning
as a presentation attribute, it can be applied to any element but it has effect only on the following four elements: <altglyph>, <textpath>, <text>, <tref>, and <tspan> html, body, svg { height: 100%; font: 36px verdana, helvetica, arial, sans-serif; } <svg viewbox="0 0 150 125" xmlns="http://www.w3.org/2000/svg"> <text x="10" y="30" kerning="auto">auto</text> <text x="10" y="70" kerning="0">number</text> <text x="10" y="110" kerning="20px">l...
keyPoints - SVG: Scalable Vector Graphics
Web › SVG › Attribute › keyPoints
five elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, <animatetransform>, and <set> html, body, svg { height: 100%; } <svg viewbox="0 0 120 120" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink"> <path d="m10,110 a120,120 -45 0,1 110 10 a120,120 -45 0,1 10,110" stroke="lightgrey" stroke-width="2" fill="none" id="motionpath"/> <circle cx="10" cy="110" r="3" fill="lightgrey"/> <circle cx="110" cy="10" r="3" fill="lightgrey"/> <circle r="5" fill="red"> <animatemotion dur="3s" repeatcount="indefinite" keypoints="0;0.5;1" keytimes="0;0.15;1" calcmode="linear"> <mpath xlink:href="#motionpath"/> </animatemotion> </circle> </s...
keySplines - SVG: Scalable Vector Graphics
Web › SVG › Attribute › keySplines
four elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, and <animatetransform> html, body, svg { height: 100%; } <svg viewbox="0 0 120 120" xmlns="http://www.w3.org/2000/svg"> <circle cx="60" cy="10" r="10"> <animate attributename="cx" dur="4s" calcmode="spline" repeatcount="indefinite" values="60 ; 110 ; 60 ; 10 ; 60" keytimes="0 ; 0.25 ; 0.5 ; 0.75 ; 1" keysplines=...
lengthAdjust - SVG: Scalable Vector Graphics
Web › SVG › Attribute › lengthAdjust
four elements are using this attribute: <text>, <textpath>, <tref>, and <tspan> html, body, svg { height: 100%; } <svg width="300" height="150" xmlns="http://www.w3.org/2000/svg"> <g font-face="sans-serif"> <text x="0" y="20" textlength="300" lengthadjust="spacing"> stretched using spacing only.
letter-spacing - SVG: Scalable Vector Graphics
Web › SVG › Attribute › letter-spacing
as a presentation attribute, it can be applied to any element but it has effect only on the following eight elements: <altglyph>, <text>, <textpath>, <tref>, and <tspan> html, body, svg { height: 100%; } <svg viewbox="0 0 400 30" xmlns="http://www.w3.org/2000/svg"> <text y="20" letter-spacing="2">bigger letter-spacing</text> <text x="200" y="20" letter-spacing="-0.5">smaller letter-spacing</text> </svg> usage notes value normal |...
lighting-color - SVG: Scalable Vector Graphics
Web › SVG › Attribute › lighting-color
two elements are using this attribute: <fediffuselighting> and <fespecularlighting> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="diffuselighting1" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic" lighting-color="white"> <fepointlight x="60" y="60" z="20" /> </fediffuselighting> </filter> <filter id="diffuselighting2" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic" lighting-color="blue"> <fepointlight x="60" y="60" z="20" /> </fediffuselighting> </filter> <rect x="0" y="0" width="200" height="200" style="filter: url(#diffuselighting...
limitingConeAngle - SVG: Scalable Vector Graphics
Web › SVG › Attribute › limitingConeAngle
only one element is using this attribute: <fespotlight> html, body, svg { height: 100%; } <svg viewbox="0 0 480 200" xmlns="http://www.w3.org/2000/svg"> <filter id="spotlight1" x="0" y="0" width="100%" height="100%"> <fediffuselighting diffuseconstant="2"> <fespotlight x="10" y="10" z="50" pointsatx="100" pointsaty="100" limitingconeangle="10" /> </fediffuselighting> </filter> <filter id="spotlight2" x="0" y="0" width="100%" height="100%"> <fed...
local - SVG: Scalable Vector Graphics
Web › SVG › Attribute › local
only one element is using this attribute: <color-profile> usage notes value <string> default value none animatable no <string> this value specifies the unique id for a locally stored color profile as specified by international color consortium.
mathematical - SVG: Scalable Vector Graphics
Web › SVG › Attribute › mathematical
only one element is using this attribute: <font-face> usage notes value <number> default value none animatable no <number> this value indicates the alignment coordinate for the glyphs.
max - SVG: Scalable Vector Graphics
Web › SVG › Attribute › max
five elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, <animatetransform>, and <set> html, body, svg { height: 100%; } <svg viewbox="0 0 120 120" xmlns="http://www.w3.org/2000/svg"> <circle cx="60" cy="10" r="10"> <animate attributename="cx" dur="4s" max="6s" repeatcount="indefinite" values="60 ; 110 ; 60 ; 10 ; 60" keytimes="0 ; 0.25 ; 0.5 ; 0.75 ; 1"/> <animate attributename="cy" dur="4s" max="6s" repeatcount="indefinite" values="10 ; 60 ; 110 ; 60 ; 10" keytimes="0 ; 0.25 ; 0.5 ; 0.75 ; 1"/> </circle> </svg> usage notes value <clock-value> default value none animatable no <clock-value> specifies th...
media - SVG: Scalable Vector Graphics
Web › SVG › Attribute › media
only one element is using this attribute: <style> html, body, svg { height: 100%; } <svg viewbox="0 0 240 220" xmlns="http://www.w3.org/2000/svg"> <style> rect { fill: black; } </style> <style media="all and (min-width: 600px)"> rect { fill: seagreen; } </style> <text y="15">resize the window to see the effect</text> <rect y="20" width="200" height="200" /> </svg> usage notes value <media-query-list> default value all animatable yes <media-query-list> this value holds a media query that needs to match in order for the style sheet to be applied.
min - SVG: Scalable Vector Graphics
Web › SVG › Attribute › min
five elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, <animatetransform>, and <set> html, body, svg { height: 100%; } <svg viewbox="0 0 120 120" xmlns="http://www.w3.org/2000/svg"> <circle cx="60" cy="10" r="10"> <animate attributename="cx" dur="4s" min="2s" repeatcount="indefinite" values="60 ; 110 ; 60 ; 10 ; 60" keytimes="0 ; 0.25 ; 0.5 ; 0.75 ; 1"/> <animate attributename="cy" dur="4s" min="2s" repeatcount="indefinite" values="10 ; 60 ; 110 ; 60 ; 10" keytimes="0 ; 0.25 ; 0.5 ; 0.75 ; 1"/> </circle> </svg> usage notes value <clock-value> default value 0 animatable no <clock-value> specifies the l...
mode - SVG: Scalable Vector Graphics
Web › SVG › Attribute › mode
only one element is using this attribute: <feblend> html, body, svg { height: 100%; } <svg viewbox="0 0 480 200" xmlns="http://www.w3.org/2000/svg"> <filter id="blending1" x="0" y="0" width="100%" height="100%"> <feflood result="floodfill" x="0" y="0" width="100%" height="100%" flood-color="seagreen" flood-opacity="1"/> <feblend in="sourcegraphic" in2="floodfill" mode="multiply"/> </filter> <filter id="blending2" x="0" y="0" width="100%" height="100%"> <feflood result="floodfill" x="0" y="0" width="100%" height="100%" flood-color="seagreen" flood-opacity="1"/> <feblend in="sourcegraphic" in2="floodfill" mode="color-dodge"/> </filter> <image xlink:href="//developer.mo...
name - SVG: Scalable Vector Graphics
Web › SVG › Attribute › name
two elements are using this attribute: <color-profile> and <font-face-name> color-profile for <color-profile>, name defines the name of the color profile.
numOctaves - SVG: Scalable Vector Graphics
Web › SVG › Attribute › numOctaves
only one element is using this attribute: <feturbulence> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="noise1" x="0" y="0" width="100%" height="100%"> <feturbulence basefrequency="0.025" numoctaves="1" /> </filter> <filter id="noise2" x="0" y="0" width="100%" height="100%"> <feturbulence basefrequency="0.025" numoctaves="3" /> <...
operator - SVG: Scalable Vector Graphics
Web › SVG › Attribute › operator
two elements are using this attribute: <fecomposite> and <femorphology> html, body, svg { height: 100%; font: 20px arial, helvetica, sans-serif; } <svg viewbox="0 0 120 70" xmlns="http://www.w3.org/2000/svg"> <filter id="erode"> <femorphology operator="erode" radius="0.4"/> </filter> <filter id="dilate"> <femorphology operator="dilate" radius="0.8"/> </filter> <text x="0" y="15">normal text</text> <text x="0" y="40" filter="url(#erode)">thin text</text> <text x="0" y="65" filter="url(#dilate)">fat text</text> </svg> fecomposite for <fecomposite>, operator defines the compositing operation that is to be performed...
orient - SVG: Scalable Vector Graphics
Web › SVG › Attribute › orient
only one element is using this attribute: <marker> html, body, svg { height: 100%; } <svg viewbox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"> <defs> <marker id="arrow" viewbox="0 0 10 10" refx="5" refy="5" markerwidth="6" markerheight="6" orient="auto-start-reverse"> <path d="m 0 0 l 10 5 l 0 10 z" /> </marker> <marker id="dataarrow" viewbox="0 0 10 10" refx="5" refy="5" markerwidth="6" markerheight="6" orient="-65deg"> <path d="m 0 0 l 10 5 l 0 10 z" fill="red" /> </marker> </defs> <polyline points="10,10 10,90 90,90" fill="none" stroke="black" marker-start="url(#arrow)" marker-end="url(#arrow)" /> <poly...
orientation - SVG: Scalable Vector Graphics
Web › SVG › Attribute › orientation
only one element is using this attribute: <glyph> usage notes value h | v default value none (meaning glyph can be used for both text directions) animatable yes h this value indicates that the glyph is only used for a horizontal text direction.
origin - SVG: Scalable Vector Graphics
Web › SVG › Attribute › origin
only one element is using this attribute: <animatemotion> context notes value default default value default animatable no specifications specification status comment svg animations level 2the definition of 'origin' in that specification.
overline-position - SVG: Scalable Vector Graphics
Web › SVG › Attribute › overline-position
usage context categories none value <number> animatable no normative document svg 1.1 (2nd edition) elements the following elements can use the overline-position attribute: <font-face> ...
overline-thickness - SVG: Scalable Vector Graphics
Web › SVG › Attribute › overline-thickness
usage context categories none value <number> animatable no normative document svg 1.1 (2nd edition) elements the following elements can use the overline-thickness attribute: <font-face> ...
panose-1 - SVG: Scalable Vector Graphics
Web › SVG › Attribute › panose-1
only one element is using this attribute: <font-face> usage notes value <integer>{10} default value 0 0 0 0 0 0 0 0 0 0 animatable no <integer>{10} this value specifies a panose-1 number and consists of ten decimal integers, separated by whitespace.
pathLength - SVG: Scalable Vector Graphics
Web › SVG › Attribute › pathLength
seven elements are using this attribute: <circle>, <ellipse>, <line>, <path>, <polygon>, <polyline>, and <rect> html,body,svg { height:100% } <svg viewbox="0 0 100 60" xmlns="http://www.w3.org/2000/svg"> <style> path { fill: none; stroke: black; stroke-width: 2; stroke-dasharray: 10; } </style> <!-- no pathlength, the real length of the path is used.
patternTransform - SVG: Scalable Vector Graphics
Web › SVG › Attribute › patternTransform
only one element is using this attribute: <pattern> html,body,svg { height:100% } <svg viewbox="0 0 100 100" xmlns="http://www.w3.org/2000/svg"> <!-- apply a transform on the tile --> <pattern id="p1" width=".25" height=".25" patterntransform="rotate(20) skewx(30) scale(1 0.5)"> <circle cx="10" cy="10" r="10" /> </pattern> <!-- apply the transformed pattern tile --> <rect x="10" y="10" width="80" height="80" fill="url(#p1)" /> </svg> pattern for <pattern>, patterntransform defines a list of transform definitions that are applied to a pattern tile.
points - SVG: Scalable Vector Graphics
Web › SVG › Attribute › points
two elements are using this attribute: <polyline>, and <polygon> html,body,svg { height:100% } <svg viewbox="-10 -10 220 120" xmlns="http://www.w3.org/2000/svg"> <!-- polyline is an open shape --> <polyline stroke="black" fill="none" points="50,0 21,90 98,35 2,35 79,90"/> <!-- polygon is a closed shape --> <polygon stroke="black" fill="none" transform="translate(100,0)" points="50,0 21,90 98,35 2,35 79,90"/> <!-- it is usualy considered best practices to separate a x and y coordinate with a comma and a group of coordinates by a sp...
r - SVG: Scalable Vector Graphics
Web › SVG › Attribute › r
two elements are using this attribute: <circle>, and <radialgradient> html,body,svg { height:100% } <svg viewbox="0 0 300 200" xmlns="http://www.w3.org/2000/svg"> <radialgradient r="0" id="mygradient000"> <stop offset="0" stop-color="white" /> <stop offset="100%" stop-color="black" /> </radialgradient> <radialgradient r="50%" id="mygradient050"> <stop offset="0" stop-color="white" /> <stop offset="100%" stop-color="black" /> </radialgradient> <radialgradient r="100%" id="mygradient100"> <stop offset="0" stop-color="white" /> <stop offset="100%" stop-color="black" /> </radialgradient> <circle cx="50" cy="50" r="0"/> <circle cx="150" cy="50" r="25"/> <circle cx="250" cy="50" r="50"/> <rect...
radius - SVG: Scalable Vector Graphics
Web › SVG › Attribute › radius
the values are in the coordinate system established by the primitiveunits attribute on the <filter> element.
rendering-intent - SVG: Scalable Vector Graphics
Web › SVG › Attribute › rendering-intent
only one element is using this attribute: <color-profile> usage notes value auto | perceptual | relative-colorimetric | saturation | absolute-colorimetric default value auto animatable yes auto this value allows the user agent to determine the best intent based on the content type.
repeatCount - SVG: Scalable Vector Graphics
Web › SVG › Attribute › repeatCount
five elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, <animatetransform>, and <set> html, body, svg { height: 100%; } <svg viewbox="0 0 220 150" xmlns="http://www.w3.org/2000/svg"> <rect x="0" y="0" width="100" height="100"> <animate attributetype="xml" attributename="y" from="0" to="50" dur="1s" repeatcount="5"/> </rect> <rect x="120" y="0" width="100" height="100"> <animate attributetype="xml" attributename="y" from="0" to="50" dur="1s" repeatcount="indefinite"/> </rect> </svg> usage notes value <number> | indefinite default value none animatable no <number> this value specifies the number ...
repeatDur - SVG: Scalable Vector Graphics
Web › SVG › Attribute › repeatDur
five elements are using this attribute: <animate>, <animatecolor>, <animatemotion>, <animatetransform>, and <set> html, body, svg { height: 100%; } <svg viewbox="0 0 220 150" xmlns="http://www.w3.org/2000/svg"> <rect x="0" y="0" width="100" height="100"> <animate attributetype="xml" attributename="y" from="0" to="50" dur="1s" repeatdur="5s"/> </rect> <rect x="120" y="0" width="100" height="100"> <animate attributetype="xml" attributename="y" from="0" to="50" dur="1s" repeatdur="indefinite"/> </rect> </svg> usage notes value <clock-value> | indefinite default values none animatable no <clock-value> this value specifies the du...
rx - SVG: Scalable Vector Graphics
Web › SVG › Attribute › rx
two elements are using this attribute: <ellipse>, and <rect> html,body,svg { height:100% } <svg viewbox="0 0 300 200" xmlns="http://www.w3.org/2000/svg"> <ellipse cx="50" cy="50" rx="0" ry="25" /> <ellipse cx="150" cy="50" rx="25" ry="25" /> <ellipse cx="250" cy="50" rx="50" ry="25" /> <rect x="20" y="120" width="60" height="60" rx="0" ry="15"/> <rect x="120" y="120" width="60" height="60" rx="15" ry="15"/> <rect x="220" y="120" width="60" height="60" rx="150" ry="15"/> </svg> ellipse for <ellipse>, rx defines the x-radius of the shape.
ry - SVG: Scalable Vector Graphics
Web › SVG › Attribute › ry
two elements are using this attribute: <ellipse>, and <rect> html,body,svg { height:100% } <svg viewbox="0 0 300 200" xmlns="http://www.w3.org/2000/svg"> <ellipse cx="50" cy="50" ry="0" rx="25" /> <ellipse cx="150" cy="50" ry="25" rx="25" /> <ellipse cx="250" cy="50" ry="50" rx="25" /> <rect x="20" y="120" width="60" height="60" ry="0" rx="15"/> <rect x="120" y="120" width="60" height="60" ry="15" rx="15"/> <rect x="220" y="120" width="60" height="60" ry="150" rx="15"/> </svg> ellipse for <ellipse>, ry defines the y-radius of the shape.
seed - SVG: Scalable Vector Graphics
Web › SVG › Attribute › seed
only one element is using this attribute: <feturbulence> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="noise1" x="0" y="0" width="100%" height="100%"> <feturbulence basefrequency="0.025" seed="0" /> </filter> <filter id="noise2" x="0" y="0" width="100%" height="100%"> <feturbulence basefrequency="0.025" seed="100" /> </filter> <rect x="0" y="0" width="200" height="200" style="filter:url(#noise1);" /> <rect x="0" y="0" width="200" height="200" style="filter:url(#noise2); transform: translatex(220px);" /> </svg> usage notes value <number> default value ...
shape-rendering - SVG: Scalable Vector Graphics
Web › SVG › Attribute › shape-rendering
as a presentation attribute, it can be applied to any element but it has effect only on the following seven elements: <circle>, <ellipse>, <line>, <path>, <polygon>, <polyline>, and <rect> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <circle cx="100" cy="100" r="100" shape-rendering="geometricprecision"/> <circle cx="320" cy="100" r="100" shape-rendering="crispedges"/> </svg> usage notes value auto | optimizespeed | crispedges | geometricprecision default value auto an...
side - SVG: Scalable Vector Graphics
Web › SVG › Attribute › side
only one element is using this attribute: <textpath> html, body, svg { height: 100%; } text { font: 25px arial, helvelica, sans-serif; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <text> <textpath href="#circle1" side="left">text left from the path</textpath> </text> <text> <textpath href="#circle2" side="right">text right from the path</textpath> </text> <circle id="circle1" cx="100" cy="100" r="70" fill="transparent" stroke="silver"/> <circle id="circle2" cx="320" cy="100" r="70" fill="transparent" stroke="silver"/> </svg> usage notes value left | right default value left animatable yes lef...
slope - SVG: Scalable Vector Graphics
Web › SVG › Attribute › slope
only one element is using this attribute: <font-face> usage notes value <number> default value 0 animatable no <number> this value indicates the vertical stroke angle of the font.
spacing - SVG: Scalable Vector Graphics
Web › SVG › Attribute › spacing
only one element is using this attribute: <textpath> usage notes value auto | exact default value exact animatable yes auto this value indicates that the user agent should use text-on-a-path layout algorithms to adjust the spacing between typographic characters in order to achieve visually appealing results.
specularConstant - SVG: Scalable Vector Graphics
Web › SVG › Attribute › specularConstant
only one element is using this attribute: <fespecularlighting> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="specularlighting1" x="0" y="0" width="100%" height="100%"> <fespecularlighting in="sourcegraphic" specularconstant="1.2"> <fepointlight x="60" y="60" z="20" /> </fespecularlighting> </filter> <filter id="specularlighting2" x="0" y="0" width="100%" height="100%"> <fespecularlighting in="sourcegraphic" specularconstant="0.8"> <fepointlight x="60" y="60" z="20" /> </fespecularlighting> </filter...
specularExponent - SVG: Scalable Vector Graphics
Web › SVG › Attribute › specularExponent
two elements are using this attribute: <fespecularlighting> and <fespotlight> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="diffuselighting1" x="0" y="0" width="100%" height="100%"> <fespecularlighting in="sourcegraphic" specularexponent="1"> <fepointlight x="60" y="60" z="20" /> </fespecularlighting> </filter> <filter id="diffuselighting2" x="0" y="0" width="100%" height="100%"> <fespecularlighting in="sourcegraphic" specularexponent="5"> <fepointlight x="60" y="60" z="20" /> </fespecularlighting> </filter> <rect x="0" y="0" width="200" height="200" style="filter: url(#di...
spreadMethod - SVG: Scalable Vector Graphics
Web › SVG › Attribute › spreadMethod
two elements are using this attribute: <lineargradient> and <radialgradient> context notes value pad | reflect | repeat initial value pad animatable yes pad this value indicates that the final color of the gradient fills the shape beyond the gradient's edges.
stdDeviation - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stdDeviation
only one element is using this attribute: <fegaussianblur> html, body, svg { height: 100%; } <svg viewbox="0 0 480 200" xmlns="http://www.w3.org/2000/svg"> <filter id="gaussianblur1"> <fegaussianblur stddeviation="1" /> </filter> <filter id="gaussianblur2"> <fegaussianblur stddeviation="5" /> </filter> <filter id="gaussianblur3" x="-30%" y="-30%" width="160%" height="160%"> <fegaussianblur stddeviation="10" /> </filter> <circle cx="100" cy="100" r="50" style="filter: url(#gaussianblur1);" /> <circle cx="100" cy="100" r="50" style="filter: url(#gaussianblur2); transform: translatex(140px);" /> <circle cx="100" cy="100" r="50" style="filter: url(#gaussianblur3); transform: trans...
stemh - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stemh
only one element is using this attribute: <font-face> usage notes value <number> default value none animatable no <number> this value indicates the horizontal stem width of the font.
stemv - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stemv
only one element is using this attribute: <font-face> usage notes value <number> default value none animatable no <number> this value indicates the vertical stem width of the font.
stitchTiles - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stitchTiles
only one element is using this attribute: <feturbulence> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="noise1" x="0" y="0" width="100%" height="100%"> <feturbulence basefrequency="0.025" stitchtiles="nostitch" /> </filter> <filter id="noise2" x="0" y="0" width="100%" height="100%"> <feturbulence basefrequency="0.025" stitchtiles="stitch" /> </filter> <rect x="0" y="0" width="100" height="100" style="filter: url(#noise1);" /> <rect x="0" y="0" width="100" height="100" style="filter: url(#noise1); transform: translate(100px, 0);" /> <rect x="0" y="0" width="100" height="100" style="filter: url(#noise1); transform: translate...
stop-color - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stop-color
as a presentation attribute, it can be applied to any element but it has effect only on the following element: <stop> usage notes value currentcolor | <color> <icccolor> default value black animatable yes currentcolor this keyword denotes the current fill color and can be specified in the same manner as within a <paint> specification for the fill and stroke attributes.
stop-opacity - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stop-opacity
as a presentation attribute, it can be applied to any element but it has effect only on the following element: <stop> usage notes value <opacity-value> default value 1 animatable yes <opacity-value> this value is either a <number> between 0 and 1 or a <percentage> value specifying the opacity of the color gradient stop.
strikethrough-position - SVG: Scalable Vector Graphics
Web › SVG › Attribute › strikethrough-position
usage context categories none value <number> animatable no normative document svg 1.1 (2nd edition) elements the following elements can use the strikethrough-position attribute: <font-face> ...
strikethrough-thickness - SVG: Scalable Vector Graphics
Web › SVG › Attribute › strikethrough-thickness
usage context categories none value <number> animatable no normative document svg 1.1 (2nd edition) elements the following elements can use the strikethrough-thickness attribute: <font-face> ...
stroke-dasharray - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stroke-dasharray
as a presentation attribute, it can be applied to any element, but it only has effect on the following twelve elements: <altglyph> <circle> <ellipse> <path> <line> <polygon> <polyline> <rect> <text> <textpath> <tref> <tspan> html,body,svg { height:100% } <svg viewbox="0 0 30 10" xmlns="http://www.w3.org/2000/svg"> <!-- no dashes nor gaps --> <line x1="0" y1="1" x2="30" y2="1" stroke="black" /> <!-- dashes and gaps of the same size --> <line x1="0" y1="3" x2="30" y2="3" stroke="black" stroke-dasharray="4" /> <!-- dashes and gaps of...
stroke-dashoffset - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stroke-dashoffset
as a presentation attribute, it can be applied to any element but it has effect only on the following twelve elements: <altglyph>, <circle>, <ellipse>, <path>, <line>, <polygon>, <polyline>, <rect>, <text>, <textpath>, <tref>, and <tspan> html,body,svg { height:100% } <svg viewbox="-3 0 33 10" xmlns="http://www.w3.org/2000/svg"> <!-- no dash array --> <line x1="0" y1="1" x2="30" y2="1" stroke="black" /> <!-- no dash offset --> <line x1="0" y1="3" x2="30" y2="3" stroke="black" stroke-dasharray="3 1" /> <!-- the start of the dash array computation is pulled by...
stroke-linecap - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stroke-linecap
as a presentation attribute, it can be applied to any element but it has effect only on the following eight elements: <altglyph>, <path>, <polyline>, <line>, <text>, <textpath>, <tref>, and <tspan> html,body,svg { height:100% } <svg viewbox="0 0 6 6" xmlns="http://www.w3.org/2000/svg"> <!-- effect of the (default) "butt" value --> <line x1="1" y1="1" x2="5" y2="1" stroke="black" stroke-linecap="butt" /> <!-- effect of the "round" value --> <line x1="1" y1="3" x2="5" y2="3" stroke="black" stroke-linecap="round" /> <!-- effect of the "square" val...
stroke-linejoin - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stroke-linejoin
as a presentation attribute, it can be applied to any element but it has effect only on the following nine elements: <altglyph>, <path>, <polygon>, <polyline>, <rect>, <text>, <textpath>, <tref>, and <tspan> html,body,svg { height:100% } <svg viewbox="0 0 18 12" xmlns="http://www.w3.org/2000/svg"> <!-- upper left path: effect of the "miter" value --> <path d="m1,5 a2,2 0,0,0 2,-3 a3,3 0 0 1 2,3.5" stroke="black" fill="none" stroke-linejoin="miter" /> <!-- center path: effect of the "round" value --> <path d="m7,5 a2,2 0,0,0 2,-3 a3,3 0 0 1 2,3.5...
stroke-miterlimit - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stroke-miterlimit
as a presentation attribute, it can be applied to any element but it has effect only on the following nine elements: <altglyph>, <path>, <polygon>, <polyline>, <rect>, <text>, <textpath>, <tref>, and <tspan> html,body,svg { height:100% } <svg viewbox="0 0 38 30" xmlns="http://www.w3.org/2000/svg"> <!-- impact of the default miter limit --> <path stroke="black" fill="none" stroke-linejoin="miter" id="p1" d="m1,9 l7 ,-3 l7 ,3 m2,0 l3.5 ,-3 l3.5 ,3 ...
stroke-opacity - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stroke-opacity
as a presentation attribute, it can be applied to any element but it has effect only on the following twelve elements: <altglyph>, <circle>, <ellipse>, <path>, <line>, <polygon>, <polyline>, <rect>, <text>, <textpath>, <tref>, and <tspan> html,body,svg { height:100% } <svg viewbox="0 0 40 10" xmlns="http://www.w3.org/2000/svg"> <!-- default stroke opacity: 1 --> <circle cx="5" cy="5" r="4" stroke="green" /> <!-- stroke opacity as a number --> <circle cx="15" cy="5" r="4" stroke="green" stroke-opacity="0.7" /> <!-- stroke opacit...
stroke-width - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stroke-width
as a presentation attribute, it can be applied to any element but it only has effect on shapes and text context elements, including: <altglyph>, <circle>, <ellipse>, <line>, <path>, <polygon>, <polyline>, <rect>, <text>, <textpath>, <tref>, and <tspan> html,body,svg { height:100% } <svg viewbox="0 0 30 10" xmlns="http://www.w3.org/2000/svg"> <!-- default stroke width: 1 --> <circle cx="5" cy="5" r="3" stroke="green" /> <!-- stroke width as a number --> <circle cx="15" cy="5" r="3" stroke="green" stroke-width="3" /> <!-- stroke width as a percentage --> <circle cx="25" cy="5" r="3" stroke="green" stroke-width="2%" /> </svg> usage notes ...
stroke - SVG: Scalable Vector Graphics
Web › SVG › Attribute › stroke
as a presentation attribute, it can be applied to any element but it has effect only on the following twelve elements: <altglyph>, <circle>, <ellipse>, <line>, <path>, <polygon>, <polyline>, <rect>, <text>, <textpath>, <tref>, and <tspan> html,body,svg { height:100% } <svg viewbox="0 0 20 10" xmlns="http://www.w3.org/2000/svg"> <!-- simple color stroke --> <circle cx="5" cy="5" r="4" fill="none" stroke="green" /> <!-- stroke a circle with a gradient --> <defs> <lineargradient id="mygradient"> <stop offset="0%" stop-color="green...
surfaceScale - SVG: Scalable Vector Graphics
Web › SVG › Attribute › surfaceScale
two elements are using this attribute: <fediffuselighting> and <fespecularlighting> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <filter id="diffuselighting1" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic" surfacescale="1"> <fepointlight x="60" y="60" z="20" /> </fediffuselighting> </filter> <filter id="diffuselighting2" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic" surfacescale="15"> <fepointlight x="60" y="60" z="20" /> </fediffuselighting> </filter> <rect x="0" y="0" width="200" height="200" style="filter: url(#diffuselighting1);" /> <rect...
tableValues - SVG: Scalable Vector Graphics
Web › SVG › Attribute › tableValues
four elements are using this attribute: <fefunca>, <fefuncb>, <fefuncg>, and <fefuncr> html, body, svg { height: 100%; } <svg viewbox="0 0 420 200" xmlns="http://www.w3.org/2000/svg"> <defs> <lineargradient id="gradient" gradientunits="userspaceonuse" x1="0" y1="0" x2="200" y2="0"> <stop offset="0" stop-color="#ff0000" /> <stop offset="0.5" stop-color="#00ff00" /> <stop offset="1" stop-color="#0000ff" /> </lineargradient> </defs> <filter id="componenttransfer1" x="0" y="0" width="100%" height="100%"> <fecomponenttransfer> <fefuncr type="table" tablevalues="0 1"/> <fefuncg type="table" tablevalues="0 1...
target - SVG: Scalable Vector Graphics
Web › SVG › Attribute › target
this attribute specifies the name of the browsing context (e.g., a browser tab or an (x)html iframe or object element) into which a document is to be opened when the link is activated: only one element is using this attribute: <a> html, body, svg { height: 100%; } text { font: 20px arial, helvetica, sans-serif; fill: blue; text-decoration: underline; } <svg viewbox="0 0 300 120" xmlns="http://www.w3.org/2000/svg"> <a href="https://developer.mozilla.org" target="_self"> <text x="0" y="20">open link within iframe</text> </a> <a href="https://developer.mozilla.
targetX - SVG: Scalable Vector Graphics
Web › SVG › Attribute › targetX
only one element is using this attribute: <feconvolvematrix> usage notes value <integer> default value floor(orderx / 2) animatable yes <integer> this value indicates the positioning in horizontal direction of the convolution matrix relative to a given target pixel in the input image.
targetY - SVG: Scalable Vector Graphics
Web › SVG › Attribute › targetY
only one element is using this attribute: <feconvolvematrix> usage notes value <integer> default value floor(ordery / 2) animatable yes <integer> this value indicates the positioning in vertical direction of the convolution matrix relative to a given target pixel in the input image.
text-decoration - SVG: Scalable Vector Graphics
Web › SVG › Attribute › text-decoration
as a presentation attribute, it can be applied to any element but it has effect only on the following five elements: <altglyph>, <text>, <textpath>, <tref>, and <tspan> html, body, svg { height: 100%; } <svg viewbox="0 0 250 50" xmlns="http://www.w3.org/2000/svg"> <text y="20" text-decoration="underline">underlined text</text> <text x="0" y="40" text-decoration="line-through">struck-through text</text> </svg> usage notes value <'...
text-rendering - SVG: Scalable Vector Graphics
Web › SVG › Attribute › text-rendering
as a presentation attribute, it can be applied to any element but it has effect only on the following element: <text> html, body, svg { height: 100%; } <svg viewbox="0 0 140 40" xmlns="http://www.w3.org/2000/svg"> <text y="15" text-rendering="geometricprecision">geometric precision</text> <text y="35" text-rendering="optimizelegibility">optimized legibility</text> </svg> usage notes value auto | optimizespeed | optimizelegibility | geometricprecision default value auto animatable yes auto ...
underline-position - SVG: Scalable Vector Graphics
Web › SVG › Attribute › underline-position
usage context categories none value <number> animatable no normative document svg 1.1 (2nd edition) elements the following elements can use the underline-position attribute: <font-face> ...
underline-thickness - SVG: Scalable Vector Graphics
Web › SVG › Attribute › underline-thickness
usage context categories none value <number> animatable no normative document svg 1.1 (2nd edition) elements the following elements can use the underline-thickness attribute: <font-face> ...
unicode-bidi - SVG: Scalable Vector Graphics
Web › SVG › Attribute › unicode-bidi
as a presentation attribute, it can be applied to any element but it has effect only on the following eleven elements: <altglyph>, <textpath>, <text>, <tref>, and <tspan> context notes value normal | embed | isolate | bidi-override | isolate-override | plaintext default value normal animatable no for a description of the values, please refer to the css unicode-bidi property.
unicode-range - SVG: Scalable Vector Graphics
Web › SVG › Attribute › unicode-range
only one element is using this attribute: <font-face> usage notes value <urange># default value none animatable no <urange># this value is a comma-separated list of iso 10646 characters possibly covered by the glyphs in the font.
unicode - SVG: Scalable Vector Graphics
Web › SVG › Attribute › unicode
only one element is using this attribute: <glyph> context notes value <string> default value none animatable no <string> this value specifies one or more unicode characters corresponding to a glyph.
units-per-em - SVG: Scalable Vector Graphics
Web › SVG › Attribute › units-per-em
only one element is using this attribute: <font-face> usage notes value <number> default value 1000 animatable no <number> this value indicates the the number of coordinate units on the em square.
v-alphabetic - SVG: Scalable Vector Graphics
Web › SVG › Attribute › v-alphabetic
only one element is using this attribute: <font-face> usage notes value <number> default value none animatable no specifications specification status comment scalable vector graphics (svg) 1.1 (second edition)the definition of 'v-alphabetic' in that specification.
v-hanging - SVG: Scalable Vector Graphics
Web › SVG › Attribute › v-hanging
only one element is using this attribute: <font-face> usage notes value <number> default value none animatable no <number> this value indicates the alignment coordinate for the glyphs to achieve hanging baseline alignment.
v-ideographic - SVG: Scalable Vector Graphics
Web › SVG › Attribute › v-ideographic
only one element is using this attribute: <font-face> usage notes value <number> default value none animatable no <number> this value indicates the alignment coordinate for the glyphs.
v-mathematical - SVG: Scalable Vector Graphics
Web › SVG › Attribute › v-mathematical
only one element is using this attribute: <font-face> usage notes value <number> default value none animatable no <number> this value indicates the alignment coordinate for the glyphs.
version - SVG: Scalable Vector Graphics
Web › SVG › Attribute › version
it is only allowed on the root <svg> element.
vert-origin-x - SVG: Scalable Vector Graphics
Web › SVG › Attribute › vert-origin-x
only one element is using this attribute: <font> usage notes value <number> default value half of horiz-adv-x value animatable no <number> this value indicates the x-coordinate of the origin of a glyph for vertically oriented text.
vert-origin-y - SVG: Scalable Vector Graphics
Web › SVG › Attribute › vert-origin-y
only one element is using this attribute: <font> usage notes value <number> default value ascent value animatable no <number> this value indicates the y-coordinate of the origin of a glyph for vertically oriented text.
viewTarget - SVG: Scalable Vector Graphics
Web › SVG › Attribute › viewTarget
only one element is using this attribute: <view> usage notes value <xml-name> default value none animatable no <xml-name> this value specifies the name of the object associated with the view.
widths - SVG: Scalable Vector Graphics
Web › SVG › Attribute › widths
only one element is using this attribute: <font-face> usage notes value <number> default value none animatable no <number> this value is a comma-separated list of ucs range values as defined in iso 10646, each followed by one or more glyph widths.
word-spacing - SVG: Scalable Vector Graphics
Web › SVG › Attribute › word-spacing
as a presentation attribute, it can be applied to any element but it has effect only on the following five elements: <altglyph>, <text>, <textpath>, <tref>, and <tspan> html, body, svg { height: 100%; } <svg viewbox="0 0 250 50" xmlns="http://www.w3.org/2000/svg"> <text y="20" word-spacing="2">bigger spacing between words</text> <text x="0" y="40" word-spacing="-0.5">smaller spacing between words</text> </svg> usage notes value n...
x-height - SVG: Scalable Vector Graphics
Web › SVG › Attribute › x-height
only one element is using this attribute: <font-face> usage notes value <number> default value none animatable no <number> this value indicates the height of lowercase glyphs.
xChannelSelector - SVG: Scalable Vector Graphics
Web › SVG › Attribute › xChannelSelector
only one element is using this attribute: <fedisplacementmap> html, body, svg { height: 100%; } <svg viewbox="0 0 440 160" xmlns="http://www.w3.org/2000/svg"> <filter id="displacementfilter"> <feimage xlink:href="https://mdn.mozillademos.org/files/12668/mdn.svg" x="0" y="0" width="100%" height="100%" result="abc"/> <fedisplacementmap in2="abc" in="sourcegraphic" scale="30" xchannelselector="r"/> </filter> <filter id="displacementfilter2"> <feimage xlink:href="https://mdn.mozillademos.org/files/12668/mdn.svg" x="0" y="0" width="100%" height="100%" result="abc"/> <fedisplacementmap in2="abc" in="sourcegraphic" scal...
xlink:type - SVG: Scalable Vector Graphics
Web › SVG › Attribute › xlink:type
twentytwo elements are using this attribute: <a>, <altglyph>, <animate>, <animatecolor>, <animatemotion>, <animatetransform>, <color-profile>, <cursor>, <feimage>, <filter>, <font-face-uri>, <glyphref>, <image>, <lineargradient>, <mpath>, <pattern>, <radialgradient>, <script>, <set>, <textpath>, <tref>, and <use> usage notes value simple default value simple animatable no simple this value specifies that the referred resource is a simple link.
yChannelSelector - SVG: Scalable Vector Graphics
Web › SVG › Attribute › yChannelSelector
only one element is using this attribute: <fedisplacementmap> html, body, svg { height: 100%; } <svg viewbox="0 0 440 160" xmlns="http://www.w3.org/2000/svg"> <filter id="displacementfilter"> <feimage xlink:href="https://mdn.mozillademos.org/files/12668/mdn.svg" x="0" y="0" width="100%" height="100%" result="abc"/> <fedisplacementmap in2="abc" in="sourcegraphic" scale="30" ychannelselector="r"/> </filter> <filter id="displacementfilter2"> <feimage xlink:href="https://mdn.mozillademos.org/files/12668/mdn.svg" x="0" y="0" width="100%" height="100%" result="abc"/> <fedisplacementmap in2="abc" in="sourcegraphic" scal...
zoomAndPan - SVG: Scalable Vector Graphics
Web › SVG › Attribute › zoomAndPan
two elements are using this attribute: <svg> and <view> html, body, svg { height: 100%; } <svg viewbox="0 0 200 200" xmlns="http://www.w3.org/2000/svg" zoomandpan="disable"> <filter id="diffuselighting" x="0" y="0" width="100%" height="100%"> <fediffuselighting in="sourcegraphic" zoomandpan="1"> <fepointlight x="60" y="60" z="20" /> </fediffuselighting> </filter> <rect x="0" y="0" width="200" height="200" styl...
Compatibility sources - SVG: Scalable Vector Graphics
Web › SVG › Compatibility sources
the following sources are used for the compatibility tables on svg elements and attributes: https://developer.mozilla.org/en/svg_in_firefox together with its revision history for firefox http://www.webkit.org/projects/svg/status.xml together with its recorded archive for webkit, safari and chrome http://www.opera.com/docs/specs/opera9/svg/ and accompanying pages for opera >= 9, http://www.opera.com/docs/specs/opera8/ for opera 8 http://blogs.msdn.com/b/ie/archive/2010/03/18/svg-in-ie9-roadmap.aspx for hints on ie9 support status the svg support charts at codedread.com for basic checks against the w3c test suite wikipedia for basic hints, not normative ...
<feBlend> - SVG: Scalable Vector Graphics
Web › SVG › Element › feBlend
usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes presentation attributes filter primitive attributes class style specific attributes in in2 mode dom interface this element implements the svgfeblendelement interface.
<feComposite> - SVG: Scalable Vector Graphics
Web › SVG › Element › feComposite
if the arithmetic operation is chosen, each result pixel is computed using the following formula: result = k1*i1*i2 + k2*i1 + k3*i2 + k4 where: i1 and i2 indicate the corresponding pixel channel values of the input image, which map to in and in2 respectively k1, k2, k3 and k4 indicate the values of the attributes with the same name usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes » presentation attributes » filter primitive attributes » class style specific attributes in in2 operator k1 k2 k3 k4 dom interface this element implements the svgfecompositeelement interface.
<feConvolveMatrix> - SVG: Scalable Vector Graphics
Web › SVG › Element › feConvolveMatrix
assuming the simplest case (where the input image's pixel grid aligns perfectly with the kernel's pixel grid) and assuming default values for attributes ‘divisor’, ‘targetx’ and ‘targety’, then resulting color value will be: (9* 0 + 8* 20 + 7* 40 + 6*100 + 5*120 + 4*140 + 3*200 + 2*220 + 1*240) / (9+8+7+6+5+4+3+2+1) usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes presentation attributes filter primitive attributes class style specific attributes in order kernelmatrix divisor bias targetx targety edgemode kernelunitlength preservealpha dom interface this element implements the svgfeconvolvematrixelement ...
<feDisplacementMap> - SVG: Scalable Vector Graphics
Web › SVG › Element › feDisplacementMap
usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes presentation attributes filter primitive attributes class style specific attributes in in2 scale xchannelselector ychannelselector dom interface this element implements the svgfedisplacementmapelement interface.
<feDistantLight> - SVG: Scalable Vector Graphics
Web › SVG › Element › feDistantLight
usage context categorieslight source elementpermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes specific attributes azimuth elevation dom interface this element implements the svgfedistantlightelement interface.
<feFlood> - SVG: Scalable Vector Graphics
Web › SVG › Element › feFlood
usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<animate>, <animatecolor>, <set> attributes global attributes core attributes presentation attributes filter primitive attributes class style specific attributes flood-color flood-opacity dom interface this element implements the svgfefloodelement interface.
<feGaussianBlur> - SVG: Scalable Vector Graphics
Web › SVG › Element › feGaussianBlur
usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes presentation attributes filter primitive attributes class style specific attributes in stddeviation edgemode dom interface this element implements the svgfegaussianblurelement interface.
<feImage> - SVG: Scalable Vector Graphics
Web › SVG › Element › feImage
the <feimage> svg filter primitive fetches image data from an external source and provides the pixel data as output (meaning if the external source is an svg image, it is rasterized.) usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<animate>, <animatetransform>, <set> attributes global attributes core attributes presentation attributes filter primitive attributes xlink attributes class style externalresourcesrequired specific attributes preserveaspectratio xlink:href dom interface this element implements the svgfeimageelement interface.
<feMorphology> - SVG: Scalable Vector Graphics
Web › SVG › Element › feMorphology
usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes presentation attributes filter primitive attributes class style specific attributes in operator radius dom interface this element implements the svgfemorphologyelement interface.
<feOffset> - SVG: Scalable Vector Graphics
Web › SVG › Element › feOffset
usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes presentation attributes filter primitive attributes class style specific attributes in dx dy dom interface this element implements the svgfeoffsetelement interface.
<fePointLight> - SVG: Scalable Vector Graphics
Web › SVG › Element › fePointLight
usage context categorieslight source elementpermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes specific attributes x y z dom interface this element implements the svgfepointlightelement interface.
<feSpotLight> - SVG: Scalable Vector Graphics
Web › SVG › Element › feSpotLight
usage context categorieslight source elementpermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes specific attributes x y z pointsatx pointsaty pointsatz specularexponent limitingconeangle dom interface this element implements the svgfespotlightelement interface.
<feTile> - SVG: Scalable Vector Graphics
Web › SVG › Element › feTile
usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes presentation attributes filter primitive attributes class style specific attributes in dom interface this element implements the svgfetileelement interface.
<feTurbulence> - SVG: Scalable Vector Graphics
Web › SVG › Element › feTurbulence
usage context categoriesfilter primitive elementpermitted contentany number of the following elements, in any order:<animate>, <set> attributes global attributes core attributes presentation attributes filter primitive attributes class style specific attributes basefrequency numoctaves seed stitchtiles type dom interface this element implements the svgfeturbulenceelement interface.
Tools for SVG - SVG: Scalable Vector Graphics
Web › SVG › Tutorial › Tools for SVG
to store inkscape specific data, it extends the svg file with elements and attributes in a custom namespace, but you can also choose to export as plain svg.
mimeTypes.rdf corruption - SVG: Scalable Vector Graphics
Web › SVG › mimeTypes.rdf corruption
fix for os file associations your os may be associating the wrong media type with the .svg filename extension if you have installed an old program such as photoshop elements 1.0 and chose to install the *very* old adobe svg viewer that comes bundled with it.
SVG: Scalable Vector Graphics
Web › SVG
documentation svg element reference details about each svg element.
Same-origin policy - Web security
Web › Security › Same-origin policy
cross-origin network access the same-origin policy controls interactions between two different origins, such as when you use xmlhttprequest or an <img> element.
Types of attacks - Web security
Web › Security › Types of attacks
a csrf token should be included in <form> elements via a hidden input field.
Weak signature algorithms - Web security
Web › Security › Weak Signature Algorithm
the strength of the hash algorithm used in signing a digital certificate is a critical element of the security of the certificate.
XML Index - XML: Extensible Markup Language
Web › XML › Index
4 xml:base html baseelement, needsspectable, svg, xml:base xml:base is like the html baseelement but can specify the base uri per element as well as the entire document.
XML: Extensible Markup Language
Web › XML
xml:basexml:base is like the html baseelement but can specify the base uri per element as well as the entire document.
attribute - XPath
Web › XPath › Axes › attribute
only elements have attributes.
child - XPath
Web › XPath › Axes › child
since only the root node or element nodes have children, any other use will select nothing.
descendant-or-self - XPath
Web › XPath › Axes › descendant-or-self
attribute and namespace nodes are not included - the parent of an attribute node is an element node, but attribute nodes are not the children of their parents.
descendant - XPath
Web › XPath › Axes › descendant
attribute and namespace nodes are not included - the parent of an attribute node is an element node, but attribute nodes are not the children of their parents.
namespace - XPath
Web › XPath › Axes › namespace
in this case, the context node must be an element node.
Comparison of CSS Selectors and XPath - XPath
Web › XPath › Comparison with CSS selectors
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes this article seeks to document the difference between css selectors and xpath for web developers to be able to better choose the right tool for the right job.
boolean - XPath
Web › XPath › Functions › boolean
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the boolean function evaluates an expression and returns true or false.
ceiling - XPath
Web › XPath › Functions › ceiling
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the ceiling function evaluates a decimal number and returns the smallest integer greater than or equal to the decimal number.
choose - XPath
Web › XPath › Functions › choose
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the choose function returns one of the specified objects based on a boolean parameter.
concat - XPath
Web › XPath › Functions › concat
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the concat function concatenates two or more strings and returns the resulting string.
contains - XPath
Web › XPath › Functions › contains
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the contains function determines whether the first argument string contains the second argument string and returns boolean true or false.
count - XPath
Web › XPath › Functions › count
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the count function counts the number of nodes in a node-set and returns an integer.
current - XPath
Web › XPath › Functions › current
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the current function can be used to get the context node in an xslt instruction.
document - XPath
Web › XPath › Functions › document
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the document finds a node-set in an external document, or multiple external documents, and returns the resulting node-set.
false - XPath
Web › XPath › Functions › false
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the false function returns boolean false.
floor - XPath
Web › XPath › Functions › floor
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the floor function evaluates a decimal number and returns the largest integer less than or equal to the decimal number.
function-available - XPath
Web › XPath › Functions › function-available
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the function-available function determines if a given function is available and returns boolean true or false.
generate-id - XPath
Web › XPath › Functions › generate-id
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the generate-id function generates a unique id for the first node in a given node-set and returns a string containing that id.
id - XPath
Web › XPath › Functions › id
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the id function finds nodes matching the given ids and returns a node-set containing the identified nodes.
lang - XPath
Web › XPath › Functions › lang
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the lang function determines whether the context node matches the given language and returns boolean true or false.
last - XPath
Web › XPath › Functions › last
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the last function returns a number equal to the context size from the expression evaluation context.
local-name - XPath
Web › XPath › Functions › local-name
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the local-name function returns a string representing the local name of the first node in a given node-set.
name - XPath
Web › XPath › Functions › name
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the name function returns a string representing the qname of the first node in a given node-set.
normalize-space - XPath
Web › XPath › Functions › normalize-space
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the normalize-space function strips leading and trailing white-space from a string, replaces sequences of whitespace characters by a single space, and returns the resulting string.
number - XPath
Web › XPath › Functions › number
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the number function converts an object to a number and returns the number.
round - XPath
Web › XPath › Functions › round
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the round function returns a number that is the nearest integer to the given number.
starts-with - XPath
Web › XPath › Functions › starts-with
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the starts-with checks whether the first string starts with the second string and returns true or false.
string-length - XPath
Web › XPath › Functions › string-length
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the string-length function returns a number equal to the number of characters in a given string.
string - XPath
Web › XPath › Functions › string
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the string function converts the given argument to a string.
substring-after - XPath
Web › XPath › Functions › substring-after
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the substring-after function returns a string that is the rest of a given string after a given substring.
substring-before - XPath
Web › XPath › Functions › substring-before
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the substring-before function returns a string that is the part of a given string before a given substring.
substring - XPath
Web › XPath › Functions › substring
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the substring function returns a part of a given string.
sum - XPath
Web › XPath › Functions › sum
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the sum function returns a number that is the sum of the numeric values of each node in a given node-set.
system-property - XPath
Web › XPath › Functions › system-property
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the system-property function returns an object representing the given system-property.
translate - XPath
Web › XPath › Functions › translate
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the translate function evaluates a string and a set of characters to translate and returns the translated string.
true - XPath
Web › XPath › Functions › true
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the true function returns a boolean value of true.
unparsed-entity-url - XPath
Web › XPath › Functions › unparsed-entity-url
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the unparsed-entity-url() function returns the uri of the unparsed entity with the given name.
Common XSLT Errors - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Common errors
the <xsl:namespace-alias> element.
<xsl:apply-imports> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › apply-imports
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:apply-imports> element is fairly arcane, used mostly in complex stylesheets.
<xsl:apply-templates> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › apply-templates
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:apply-templates> element selects a set of nodes in the input tree and instructs the processor to apply the proper templates to them.
<xsl:attribute-set> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › attribute-set
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:attribute-set> element creates a named set of attributes, which can then be applied as whole to the output document, in a manner similar to named styles in css.
<xsl:call-template> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › call-template
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:call-template> element invokes a named template.
<xsl:comment> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › comment
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:comment> element writes a comment to the output document.
<xsl:copy-of> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › copy-of
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:copy-of> element makes a deep copy (including descendant nodes) of whatever the select attribute specifies to the output document.
<xsl:decimal-format> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › decimal-format
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:decimal-format> element defines the characters and symbols that are to be used in converting numbers into strings using theformat-number( ) function.
<xsl:fallback> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › fallback
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:fallback> element specifies what template to use if a given extension (or, eventually, newer version) element is not supported.
<xsl:import> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › import
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:import> element is a top-level element that serves to import the contents of one stylesheet into another stylesheet.
<xsl:include> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › include
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:include> element merges the contents of one stylesheet with another.
<xsl:key> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › key
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:key> element declares a named key which can be used elsewhere in the stylesheet with the key( ) function.
<xsl:message> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › message
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:message> element outputs a message (to the javascript console in ns) and optionally terminates execution of the stylesheet.
<xsl:number> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › number
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:number> element counts things sequentially.
<xsl:processing-instruction> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › processing-instruction
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:processing-instruction> element writes a processing instruction to the output document.
<xsl:sort> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › sort
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:sort> element defines a sort key for nodes selected by <xsl:apply-templates> or <xsl:for-each> and determines the order in which they are processed.
<xsl:text> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › text
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:text> element writes literal text to the output tree.
<xsl:transform> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › transform
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:transform> element is exactly equivalent to the <xsl:stylesheet> element.
<xsl:value-of> - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › Element › value-of
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:value-of> element evaluates an xpath expression, converts it to a string, and writes that string to the result tree.
Basic Example - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › XSLT JS interface in Gecko › Basic Example
ull); xslstylesheet = myxmlhttprequest.responsexml; xsltprocessor.importstylesheet(xslstylesheet); // load the xml file, example1.xml myxmlhttprequest = new xmlhttprequest(); myxmlhttprequest.open("get", "example1.xml", false); myxmlhttprequest.send(null); xmldoc = myxmlhttprequest.responsexml; var fragment = xsltprocessor.transformtofragment(xmldoc, document); document.getelementbyid("example").innerhtml = ""; mydom = fragment; document.getelementbyid("example").appendchild(fragment); } ...
Introduction - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › XSLT JS interface in Gecko › Introduction
for example, it permits the rearranging and sorting of elements; it also provides more fine-grained control of the resulting document's structure.
Setting Parameters - XSLT: Extensible Stylesheet Language Transformations
Web › XSLT › XSLT JS interface in Gecko › Setting Parameters
xslt provides the xsl:param element, which is a child of the xsl:stylesheet element.
WebAssembly Concepts - WebAssembly
WebAssembly › Concepts
if the application uses opengl, the html also contains a <canvas> element that is used as the rendering target.
Exported WebAssembly functions - WebAssembly
WebAssembly › Exported functions
an example let's look at an example to clear things up (you can find this on github as table-set.html; see it running live also, and check out the wasm text representation): var othertable = new webassembly.table({ element: "anyfunc", initial: 2 }); webassembly.instantiatestreaming(fetch('table.wasm')) .then(obj => { var tbl = obj.instance.exports.tbl; console.log(tbl.get(0)()); // 13 console.log(tbl.get(1)()); // 42 othertable.set(0,tbl.get(0)); othertable.set(1,tbl.get(1)); console.log(othertable.get(0)()); console.log(othertable.get(1)()); }); here we create a table (othertable) from javascript...
Loading and running WebAssembly code - WebAssembly
WebAssembly › Loading and running
your code might look something like this: webassembly.instantiatestreaming(fetch('mymodule.wasm'), importobject) .then(obj => { // call an exported function: obj.instance.exports.exported_func(); // or access the buffer contents of an exported memory: var i32 = new uint32array(obj.instance.exports.memory.buffer); // or access the elements of an exported table: var table = obj.instance.exports.table; console.log(table.get(0)()); }) note: for more information on how exporting from a webassembly module works, have a read of using the webassembly javascript api, and understanding webassembly text format.