Lossless compression - MDN Web Docs Glossary: Definitions of Web-related terms
lossless compression is a class of data compression algorithms that allows the original data to be perfectly reconstructed from the compressed data.
... lossless compression methods are reversible.
... examples of lossless compression include gzip, brotli, webp, and png, lossy compression, on the other hand, uses inexact approximations by discarding some data from the original file, making it an irreversible compression method.

CompositionEvent.initCompositionEvent() - Web APIs
the initcompositionevent() method of the compositionevent interface initializes the attributes of a compositionevent object instance.
... syntax compositioneventinstance.initcompositionevent(typearg, canbubblearg, cancelablearg, viewarg, dataarg, localearg) parameters typearg a domstring representing the type of composition event; this will be one of compositionstart, compositionupdate, or compositionend.
... specifications specification status comment document object model (dom) level 3 events specificationthe definition of 'initcompositionevent()' in that specification.

Gyroscope.Gyroscope() - Web APIs
the gyroscope constructor creates a new gyroscope object which provides on each reading the angular velocity of the device along all three axes.
... syntax var gyroscope = new gyroscope([options]) parameters options optional options are as follows: frequency: the desired number of times per second a sample should be taken, meaning the number of times per second that sensor.onreading will be called.
... gyroscopethe definition of 'gyroscope' in that specification.

Closure - MDN Web Docs Glossary: Definitions of Web-related terms
in javascript, functions create a closure context.
... learn more general knowledge closure on wikipedia technical reference closure on mdn ...

Microsoft Edge - MDN Web Docs Glossary: Definitions of Web-related terms
microsoft edge is a free-of-cost graphical web browser bundled with microsoft windows and developed by microsoft since 2014.
... initially known as spartan, edge replaced the longstanding microsoft browser internet explorer.

Snap positions - MDN Web Docs Glossary: Definitions of Web-related terms
a scroll container may set snap positions — points that the scrollport will stop moving at after a scrolling operation is completed.
... defining snap positions on the scroll container was introduced in the css scroll snap specification.

Index - MDN Web Docs Glossary: Definitions of Web-related terms
found 528 pages: # page tags and summary 1 mdn web docs glossary: definitions of web-related terms beginner, definitions, dictionary, glossary, index, landing, terminology web technologies contain long lists of jargon and abbreviations that are used in documentation and coding.
... this glossary provides definitions of words and abbreviations you need to know to successfully understand and build for the web.
... 2 404 glossary, http errors, infrastructure, navigation a 404 is a standard response code meaning that the server cannot find the requested resource.
...And 539 more matches

OS.File for the main thread
for other uses of os.file, please see the corresponding page.
... using os.file from a jsm to import os.file into your chrome code, add the following line at the start of your script: components.utils.import("resource://gre/modules/osfile.jsm") promises before using os.file from the main thread, you need some understanding of the promise library.
... also, os.file plays very nicely with task.jsm.
...And 94 more matches

Positioning - Learn web development
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.
... this article explains the different position values, and how to use them.
... prerequisites: html basics (study introduction to html), and an idea of how css works (study introduction to css.) objective: to learn how css positioning works.
...And 86 more matches

Implementing a Microsoft Active Accessibility (MSAA) Server - Accessibility
msaa is the microsoft active accessibility (msaa) api, used on windows operating systems to support assistive technologies for users with disabilities.
... on microsoft windows, these kinds of assistive technology acquire this necessary information via a combination of hacks, msaa and proprietary doms.
... msaa is supposed to be the "right way" for accessibility aids to get information, but sometimes the hacks are more effective.
...And 57 more matches

position - CSS: Cascading Style Sheets
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.
... the source for this interactive example is stored in a github repository.
...And 54 more matches

Cross-Origin Resource Sharing (CORS) - HTTP
cross-origin resource sharing (cors) is a mechanism that uses additional http headers to tell browsers to give a web application running at one origin, access to selected resources from a different origin.
... a web application executes a cross-origin http request when it requests a resource that has a different origin (domain, protocol, or port) from its own.
... an example of a cross-origin request: the front-end javascript code served from https://domain-a.com uses xmlhttprequest to make a request for https://domain-b.com/data.json.
...And 43 more matches

Browser Detection and Cross Browser Support - Archive of obsolete content
rethinking the basics of when and how to detect user agents is crucial to creating maintainable, cross browser web content.
... although browser detection is perhaps the most common scripting task that every web developer faces, it seems that the variety of different strategies in use for detecting browsers is unlimited.
... as a member of the netscape evangelism team who has spent over a year investigating existing web content, i can say without a doubt that most compatibility problems found on the web today are due to a lack of understanding of the standards combined with inadequate and inappropriate browser detection strategies.
...And 42 more matches

Choosing Standards Compliance Over Proprietary Practices - Archive of obsolete content
the purpose of this document is to discuss and emphasize the importance of conforming to open technology standards that are external to the organization.
...memos, time cards, and accounting procedures are all standardized across groups.
... in the development world, there is a need for standards because applications are designed across multiple development groups.
...And 40 more matches

How much does it cost to do something on the Web? - Learn web development
objective: review the complete process for creating a website and find out how much each step can cost.
... summary when launching a website, you may spend nothing, or your costs may go through the roof.
... in this article we discuss how much everything costs, and how you get what you pay (or don't pay).
...And 40 more matches

nsIMicrosummaryService
toolkit/components/places/public/nsimicrosummaryservice.idlscriptable this interface provides methods for managing installed microsummaries, and the bookmarks they apply to.
... 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) implemented by: @mozilla.org/microsummary/service;1 as a service: var microsummaryservice = components.classes["@mozilla.org/microsummary/service;1"] .getservice(components.interfaces.nsimicrosummaryservice); method overview void addgenerator(in nsiuri generatoruri); nsimicrosummary createmicrosummary(in nsiuri pageuri, in nsiuri generatoruri); nsisimpleenumerator getbookmarks(); nsimicrosummarygenerator getgenerator(in nsiuri generatoruri); nsimicrosummaryset getm...
...icrosummaries(in nsiuri pageuri, in long long bookmarkid); nsimicrosummary getmicrosummary(in long long bookmarkid); boolean hasmicrosummary(in long long bookmarkid); nsimicrosummarygenerator installgenerator(in nsidomdocument xmldefinition); boolean ismicrosummary(in long long bookmarkid, in nsimicrosummary microsummary); nsimicrosummary refreshmicrosummary(in long long bookmarkid); void removemicrosummary(in long long bookmarkid); void setmicrosummary(in long long bookmarkid, in nsimicrosummary microsummary); methods addgenerator() install the microsummary generator from the resource at the supplied uri.
...And 40 more matches

OpenClose - Archive of obsolete content
opening and closing popups popups and menus may be opened and closed by a script.
...the menu element has an open property which may be set to true to open the menu, or false to close the menu.
... closing menus menus will close automatically once the user has made a selection from the menu.
...And 34 more matches

Accessibility API cross-reference
this cross-reference helps us see the difference between today's accessibility api's.
... all accessibility apis to date define a list of possible object roles, or general types, such as button, menu item, text, etc.
... they also define a list of possible object states, such as focused, read-only, checked, etc.
...And 34 more matches

Choosing the right approach - Learn web development
async callbacks lose full control of how the function will be executed when passed to a third-party library.
... with setinterval(), the interval we choose includes the time taken to execute the code we want to run in.
... browser compatibility desktopmobilechromeedgefirefoxinternet exploreroperasafariandroid webviewchrome for androidfirefox for androidopera for androidsafari on iossamsung internetsettimeoutchrome full support 30edge full support 12firefox full support 1 full support 1 full support 52notes notes setinterval now defined on windoworworkerg...
...And 32 more matches

Introduction to cross browser testing - Learn web development
overview: cross browser testing next this article starts the module off by providing an overview of the topic of (cross) browser testing, answering questions such as "what is cross browser testing?", "what are the most common types of problems you'll encounter?", and "what are the main approaches for testing, identifying, and fixing problems?" prerequisites: familiarity with the core html, css, and javascript languages.
... objective: to gain an understanding of the high-level concepts involved in cross browser testing.
... what is cross browser testing?
...And 32 more matches

Closures - JavaScript
a closure is the combination of a function bundled together (enclosed) with references to its surrounding state (the lexical environment).
... in other words, a closure gives you access to an outer function’s scope from an inner function.
... in javascript, closures are created every time a function is created, at function creation time.
...And 32 more matches

Practical positioning examples - Learn web development
this article shows how to build some real world examples to illustrate what kinds of things you can do with positioning.
... prerequisites: html basics (study introduction to html), and an idea of how css works (study introduction to css.) objective: to get an idea of the practicalities of positioning a tabbed info-box the first example we'll look at is a classic tabbed info box — a very common feature used when you want to pack a lot of information into a small area.
... you might be thinking "why not just create the separate tabs as separate webpages, and just have the tabs clicking through to the separate pages to create the effect?" this code would be simpler, yes, but then each separate "page" view would actually be a newly-loaded webpage, which would make it harder to save information across views, and integrate this feature into a larger ui design.
...And 31 more matches

window.postMessage() - Web APIs
the window.postmessage() method safely enables cross-origin communication between window objects; e.g., between a page and a pop-up that it spawned, or between a page and an iframe embedded within it.
... normally, scripts on different pages are allowed to access each other if and only if the pages they originate from share the same protocol, port number, and host (also known as the "same-origin policy").
... window.postmessage() provides a controlled mechanism to securely circumvent this restriction (if used properly).
...And 31 more matches

Creating a Microsummary - Archive of obsolete content
warning: microsummary support was removed in gecko 6.0 (firefox 6.0 / thunderbird 6.0 / seamonkey 2.3) a microsummary generator is a set of instructions for creating a microsummary from the content of a page.
... web pages can reference generators via <link rel="microsummary"> elements in their <head> elements.
... in this tutorial we're going to create a microsummary generator for the spread firefox home page that displays the current firefox download count along with the label fx downloads; for example: 174475447 fx downloads.
...And 30 more matches

Positioning - Archive of obsolete content
positioning popups there are several ways in which the location of a popup on screen may be controlled.
... default positioning of popups a top level menu popup is, by default, placed with the upper edge of the popup flush with the lower edge of the menu or button it is associated with.
... for popups attached using the popup or context attributes, the default position to appear is with the upper left corner (or upper right corner in right to left locales) at the position where the mouse was clicked.
...And 29 more matches

Standard OS Libraries
this article allows you to find out what types to give to values/arguments by supplying links to the documentation of the os libraries.
... windows windows has many standard os libraries.
... the most common, found on all windows os version, is "winapi".
...And 24 more matches

background-position - CSS: Cascading Style Sheets
the background-position css property sets the initial position for each background image.
... the position is relative to the position layer set by background-origin.
... the source for this interactive example is stored in a github repository.
...And 23 more matches

nsIIOService
netwerk/base/public/nsiioservice.idlscriptable this interface provides a set of url parsing utility functions.
... note: nsiioservice may only be used from the main thread.
... implemented by @mozilla.org/network/io-service;1 as a service: var ioservice = components.classes["@mozilla.org/network/io-service;1"] .getservice(components.interfaces.nsiioservice); method overview boolean allowport(in long aport, in string ascheme); acstring extractscheme(in autf8string urlstring); unsigned long getprotocolflags(in string ascheme); nsiprotocolhandler getprotocolhandler(in string ascheme); nsichannel newchannel(in autf8string aspec, in string aorigincharset, in nsiuri abaseuri); obsolete since gecko 48 nsichannel newchannel2(in autf8string aspec, in string aorigincharset, in nsiuri abaseuri, in nsidomnode aloadingnode, in nsiprincipal aloadingprincipal, in nsiprincipal atriggeringprincipal, in uint...
...And 21 more matches

NPN_PostURL - Archive of obsolete content
« gecko plugin api reference « plug-in side plug-in api summary posts data to a url.
... syntax #include <npapi.h> nperror npn_posturl(npp instance, const char *url, const char *target, uint32 len, const char *buf, npbool file); parameters the function has the following parameters: instance pointer to the current plug-in instance.
... buf path to local temporary file or data buffer that contains the data to post.
...And 20 more matches

Debugging on Mac OS X
this document explains how to debug mozilla-derived applications such as firefox, thunderbird, and seamonkey on macos using xcode.
...for specific information on a way to debug hangs, see debugging a hang on os x.
...see building firefox for macos if you need help creating your own build.
...And 20 more matches

Self-hosted builtins in SpiderMonkey
since firefox 17, spidermonkey has the ability to self-host built-in functions in javascript.
... differences from normal javascript all self-hosted code is strict, so self-hosted functions invoked in a null or undefined scope won't be run in the scope of the global object.
... self-hosted code has access to some functionality that's not available to normal js code.
...And 19 more matches

Cached compose window FAQ
seth spitzer (sspitzer@mozilla.org) what is the "cached" compose window?
... instead of destroying the mail compose window on send (or close) just to create a new one the next time, mozilla mail will "cache" the compose window on send (or close), and use that instead.
... back 0.9.7, we hit a wall with the compose window.
...And 19 more matches

Controlling Ratios of Flex Items Along the Main Axis - CSS: Cascading Style Sheets
a first look our three properties control the following aspects of a flex item's flexibility: flex-grow: how much of the positive free space does this item get?
... important concepts when working on the main axis there are a few concepts worth digging into before looking at how the flex properties work to control ratios along the main axis.
... the second paragraph has a value of max-content and so it does the opposite.
...And 19 more matches

nsICompositionStringSynthesizer
dom/interfaces/base/nsicompositionstringsynthesizer.idlscriptable this interface is a composition string synthesizer interface that synthesizes composition string with arbitrary clauses and a caret 1.0 66 introduced gecko 26 obsolete gecko 38 inherits from: nsisupports last changed in gecko 38.0 (firefox 38.0 / thunderbird 38.0 / seamonkey 2.35) this interface is obsoleted in gecko 38.
... every instance is associated with a dom window at created by nsidomwindowutils.createcompositionstringsynthesizer().
... to create an instance for this: var domwindowutils = window.windowutils; var compositionstringsynthesizer = domwindowutils.createcompositionstringsynthesizer(); for example, when you create a composition whose composing string is "foo-bar-buzz" and "bar" is selected to convert, then, first, you need to start composition: domwindowutils.sendcompositionevent("compositionstart", "", ""); next, dispatch composition string with crause information and caret information (optional): // set new composition string with .setstring().
...And 17 more matches

cross-fade() - CSS: Cascading Style Sheets
the css cross-fade() function can be used to blend two or more images at a defined transparency.
... specification syntax the cross-fade() function takes a list of images with a percentage defining how much of each image is retained in terms of opacity when it is blended with the other images.
... cross-fade percentages think of the percentage as an opacity value for each image.
...And 17 more matches

Microsummary XML grammar reference - Archive of obsolete content
a microsummary generator is an xml document that describes how to pull specific information from a web page to be presented in summary form as a bookmark whose title changes based on the content of the page it targets.
... 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.
... for an introduction to how to create a microsummary, read the article creating a microsummary.
...And 15 more matches

nsIPluginHost
dom/plugins/base/nsipluginhost.idlscriptable please add a summary to this article.
... inherits from: nsisupports last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) method overview nsifile createtempfiletopost(in string apostdataurl); native code only!
... void createtmpfiletopost(in string apostdataurl, out string atmpfilename); native code only!
...And 15 more matches

SVGFECompositeElement - Web APIs
the svgfecompositeelement interface corresponds to the <fecomposite> 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/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="none"/><line x1="121" y1="25" x2="151" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/no...
...de" target="_top"><rect x="151" y="1" width="75" height="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="#d4...
...And 15 more matches

background-position-x - CSS: Cascading Style Sheets
the background-position-x css property sets the initial horizontal position for each background image.
... the position is relative to the position layer set by background-origin.
... the source for this interactive example is stored in a github repository.
...And 15 more matches

background-position-y - CSS: Cascading Style Sheets
the background-position-y css property sets the initial vertical position for each background image.
... the position is relative to the position layer set by background-origin.
... the source for this interactive example is stored in a github repository.
...And 15 more matches

Creating a cross-browser video player - Developer guides
this article describes a simple html5 video player that uses the media and fullscreen apis and works across most major desktop and mobile browsers.
... <figure id="videocontainer"> <video id="video" controls preload="metadata" poster="img/poster.jpg"> <source src="video/tears-of-steel-battle-clip-medium.mp4" type="video/mp4"> <source src="video/tears-of-steel-battle-clip-medium.webm" type="video/webm"> <source src="video/tears-of-steel-battle-clip-medium.ogg" type="video/ogg"> <!-- flash fallback --> <object type="application/x-shockwave-flash" data="flash-player.swf?videourl=video/tears-of-st...
...eel-battle-clip-medium.mp4" width="1024" height="576"> <param name="movie" value="flash-player.swf?videourl=video/tears-of-steel-battle-clip-medium.mp4" /> <param name="allowfullscreen" value="true" /> <param name="wmode" value="transparent" /> <param name="flashvars" value="controlbar=over&amp;image=img/poster.jpg&amp;file=flash-player.swf?videourl=video/tears-of-steel-battle-clip-medium.mp4" /> <img alt="tears of steel poster image" src="img/poster.jpg" width="1024" height="428" title="no video playback possible, please download the video 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=...
...And 15 more matches

<details>: The Details disclosure element - HTML: Hypertext Markup Language
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 disclosure widget is typically presented onscreen using a small triangle which rotates (or twists) to indicate open/closed status, with a label next to the triangle.
... 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 15 more matches

Object.prototype.toSource() - JavaScript
the tosource() method returns a string representing the source code of the object.
... syntax object.tosource(); obj.tosource(); return value a string representing the source code of the object.
... description the tosource() method returns the following values: for the built-in object object, tosource() returns the following string indicating that the source code is not available: function object() { [native code] } for instances of object, tosource() returns a string representing the source code.
...And 15 more matches

Object.prototype.toString() - JavaScript
the tostring() method returns a string representing the object.
... the source for this interactive example is stored in a github repository.
... syntax obj.tostring() return value a string representing the object.
...And 15 more matches

Rosetta - Archive of obsolete content
by default, the only possible standardized scripting language for html is ecmascript.
... hence, if you are going to use another scripting language you might expect that most of the browsers will not recognize it.
...therefore, it is also possible, in theory, to use ecmascript for a smaller task: parsing exotic programming languages (i.e., creating compilers).
...And 14 more matches

AudioListener.setPosition() - Web APIs
the setposition() method of the audiolistener interface defines the position of the listener.
... the three parameters x, y and z are unitless and describe the listener's position in 3d space according to the right-hand cartesian coordinate system.
... pannernode objects use this position relative to individual audio sources for spatialisation.
...And 14 more matches

XRViewerPose - Web APIs
the webxr device api interface xrviewerpose represents the pose (the position and orientation) of a viewer's point of view on the scene.
... each xrviewerpose can have multiple views to represent, for example, the slight separation between the left and right eye.
... properties in addition to the properties inherited from xrpose, xrviewerpose includes the following: views read only an array of xrview objects, one for each viewpoint on the scene which is needed to represent the scene to the user.
...And 14 more matches

nsIMicrosummary
toolkit/components/places/public/nsimicrosummaryservice.idlscriptable this interface defines attributes and methods for dealing with microsummaries generated by an nsimicrosummarygenerator.
... 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 addobserver(in nsimicrosummaryobserver observer); boolean equals(in nsimicrosummary aother); void removeobserver(in nsimicrosummaryobserver observer); void update(); attributes attribute type description content astring the content of the microsummary.
... generator nsimicrosummarygenerator the generator that generates this microsummary.
...And 13 more matches

MediaStreamAudioSourceNode - Web APIs
the mediastreamaudiosourcenode interface is a type of audionode which operates as an audio source whose media is received from a mediastream obtained using the webrtc or media capture and streams apis.
... a mediastreamaudiosourcenode has no inputs and exactly one output, and is created using the audiocontext.createmediastreamsource() method.
... the mediastreamaudiosourcenode takes the audio from the first mediastreamtrack whose kind attribute's value is audio.
...And 13 more matches

<position> - CSS: Cascading Style Sheets
the <position> (or <bg-position>) css data type denotes a two-dimensional coordinate used to set a location relative to an element box.
... it is used in the background-position and offset-anchor properties.
... note: the final position described by the <position> value does not need to be inside the element's box.
...And 13 more matches

Number.POSITIVE_INFINITY - JavaScript
the number.positive_infinity property represents the positive infinity value.
... the source for this interactive example is stored in a github repository.
... property attributes of number.positive_infinity writable no enumerable no configurable no description the value of number.positive_infinity is the same as the value of the global object's infinity property.
...And 13 more matches

Element Positioning - Archive of obsolete content
« 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 12 more matches

OSFile.jsm
javascript module os.file contains primitives for manipulating files out of the main thread.
... what is os.file?
... os.file is a new api designed for efficient, off-main thread, manipulation of files by privileged javascript code.
...And 12 more matches

OscillatorNode - Web APIs
the oscillatornode interface represents a periodic waveform, such as a sine wave.
... it is an audioscheduledsourcenode audio-processing module that causes a specified frequency of a given wave to be created—in effect, a constant tone.
... an oscillatornode is created using the baseaudiocontext.createoscillator() method.
...And 12 more matches

PannerNode.setPosition() - Web APIs
the setposition() method of the pannernode interface defines the position of the audio source relative to the listener (represented by an audiolistener object stored in the audiocontext.listener attribute.) the three parameters x, y and z are unitless and describe the source's position in 3d space using the right-hand cartesian coordinate system.
... the setposition() method's default value of the position is (0, 0, 0).
... syntax var audioctx = new audiocontext(); var panner = audioctx.createpanner(); panner.setposition(0,0,0); returns void.
...And 12 more matches

Cross-browser audio basics - Developer guides
this article provides: a basic guide to creating a cross-browser html5 audio player with all the associated attributes, properties, and events explained a guide to custom controls created using the media api basic audio example the code below is an example of a basic audio implementation using html5: <audio controls> <source src="audiofile.mp3" type="audio/mpeg"> <source src="audiofile.ogg" type="audio/ogg"> <!-- fallback for non supporting browsers goes here --> <p>your browser does not support html5 audio, but you can still <a href="audiofile.mp3">download the music</a>.</p> </audio> note: you can also use an mp4 file instead of mp3.
...if omitted, most browsers will attempt to guess this from the file extension.
...so the ideal place to create a fallback or inform of incompatibility is before the closing </audio> tag.
...And 12 more matches

Examples and demos from articles - Archive of obsolete content
what follows is a brief list of examples and demos from our theoretical articles.
... live demos javascript rich-text editor [zip] how to standardize the creation of complete rich-text editors in web pages.
...a possible approach to solve this problem is to nest all the informations needed by each animation to start, stop, etc.
...And 11 more matches

ActiveX Control for Hosting Netscape Plug-ins in IE - Archive of obsolete content
introduction microsoft has removed support for netscape plug-ins from ie 5.5 sp 2 and beyond.
...this page describes a control that implements the np api and hosts most netscape-compatible plug-ins.
...the control itself is implemented in a dll called pluginhostctrl.dll which is standalone from the rest of the mozilla project.
...And 11 more matches

Creating regular expressions for a microsummary generator - Archive of obsolete content
warning: microsummary support was removed in gecko 6.0 (firefox 6.0 / thunderbird 6.0 / seamonkey 2.3) a regular expression is a special kind of string (i.e.
...microsummary generators use them to identify the pages that the generators know how to summarize by matching patterns in those pages' urls.
...to learn how to create a microsummary generator, see creating a microsummary.
...And 11 more matches

Microsummary topics - Archive of obsolete content
warning: microsummary support was removed in gecko 6.0 (firefox 6.0 / thunderbird 6.0 / seamonkey 2.3) programmatically installing a microsummary generator to programmatically install a microsummary generator -- for example, in an extension that helps users create custom generators for their favorite sites -- obtain a reference to the nsimicrosummaryservice interface implemented by the nsimicrosummaryservice component, then call its installgenerator() method, passing it an xml document containing the generator.
... for example, the following code snippet installs the microsummary generator from the creating a microsummary tutorial: var generatortext = ' \ <?xml version="1.0" encoding="utf-8"?> \ <generator xmlns="http://www.mozilla.org/microsummaries/0.1" \ name="firefox download count" \ uri="urn:{835daeb3-6760-47fa-8f4f-8e4fdea1fb16}"> \ <template> \ <transform xmlns="http://www.w3.org/1999/xsl/transform" version="1.0"> \ <output method="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> \ '; var ...
... createinstance(components.interfaces.nsidomparser); var generatordoc = domparser.parsefromstring(generatortext, "text/xml"); var microsummaryservice = components.classes["@mozilla.org/microsummary/service;1"].
...And 11 more matches

JavaScript OS.Constants
javascript module os.constants contains operating system-specific constants.
... using os.constants from the main thread to initialize os.constants for use in the main thread, add the following snippet to your code: components.classes["@mozilla.org/net/osfileconstantsservice;1"].
... getservice(components.interfaces.nsiosfileconstantsservice).
...And 11 more matches

Event.composed - Web APIs
the read-only composed property of the event interface returns a boolean which indicates whether or not the event will propagate across the shadow dom boundary into the standard dom.
... syntax const iscomposed = event.composed; value a boolean which is true if the event will cross from the shadow dom into the standard dom after reaching the shadow root.
... (that is, the first node in the shadow dom in which the event began to propagate.) all ua-dispatched ui events are composed (click/touch/mouseover/copy/paste, etc.).
...And 11 more matches

RTCDataChannel.close() - Web APIs
the rtcdatachannel.close() method closes the rtcdatachannel.
... either peer is permitted to call this method to initiate closure of the channel.
... closure of the data channel is not instantaneous.
...And 11 more matches

NPN_PostURLNotify - Archive of obsolete content
« gecko plugin api reference « plug-in side plug-in api summary posts data to a url, and receives notification of the result.
... syntax #include <npapi.h> nperror npn_posturlnotify(npp instance, const char* url, const char* target, uint32 len, const char* buf, npbool file, void* notifydata); parameters the function has the following parameters: instance current plug-in instance, specified by the plug-in.
... url url of the post request, specified by the plug-in.
...And 10 more matches

OS.File.Info
instances of os.file.info represent file metadata, such as the size of the file, its last modification date, etc.
... instances of os.file.info may be obtained by: calling global method os.file.stat() either from the main thread or from a worker thread; calling instance method stat() of os.file either from the main thread or from a worker thread.
... using os.file.info example: determining if a file is a regular file the following snippet uses the main thread api to determine (asynchronously) whether some path is a regular file, or a directory, or a symbolic link: let promise = os.file.stat(somepath); promise.then( function onsuccess(info) { // |info| is an instance of |os.file.info| if (info.isdir) { // |somepath| represents a directory } else if (info.issymlink) { // |somepath| represents a symbolic link } else { // |somepath| represents a regular file } }, function onfailure(reason) { if (reason instanceof os.file.error && reason.becausenosuchfile) { // |somepath| does not represent anything } else { // some other error } } ) example: determining the owner of a ...
...And 10 more matches

nsIMicrosummaryGenerator
toolkit/components/places/public/nsimicrosummaryservice.idlscriptable this interface provides access to a microsummary that has been installed in firefox.
... 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 long calculateupdateinterval(in nsidomnode apagecontent); boolean equals(in nsimicrosummarygenerator aother); astring generatemicrosummary(in nsidomnode apagecontent); attributes attribute type description loaded boolean has the generator itself (which may be a remote resource) been loaded.
... name autf8string an arbitrary descriptive name for this microsummary generator.
...And 10 more matches

AudioListener.positionX - Web APIs
the positionx read-only property of the audiolistener interface is an audioparam representing the x position of the listener in 3d cartesian space.
... note: the parameter is a-rate when used with a pannernode whose pannernode is set to equalpower, or k-rate otherwise.
... syntax var audioctx = new audiocontext(); var mylistener = audioctx.listener; mylistener.positionx.value = 1; value an audioparam.
...And 10 more matches

AudioListener.positionY - Web APIs
the positiony read-only property of the audiolistener interface is an audioparam representing the y position of the listener in 3d cartesian space.
... note: the parameter is a-rate when used with a pannernode whose pannernode is set to equalpower, or k-rate otherwise.
... syntax var audioctx = new audiocontext(); var mylistener = audioctx.listener; mylistener.positiony.value = 1; value an audioparam.
...And 10 more matches

AudioListener.positionZ - Web APIs
the positionz read-only property of the audiolistener interface is an audioparam representing the z position of the listener in 3d cartesian space.
... note: the parameter is a-rate when used with a pannernode whose pannernode is set to equalpower, or k-rate otherwise.
... syntax var audioctx = new audiocontext(); var mylistener = audioctx.listener; mylistener.positionz.value = 1; value an audioparam.
...And 10 more matches

CloseEvent - Web APIs
a closeevent is sent to clients using websockets when the connection is closed.
... this is delivered to the listener indicated by the websocket object's onclose attribute.
... constructor closeevent() creates a new closeevent.
...And 10 more matches

SVGTextPositioningElement - Web APIs
the svgtextpositioningelement interface is implemented by elements that support attributes that position individual text glyphs.
... <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="none"/><line x1="121"...
... y1="25" x2="151" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/node" target="_top"><rect x="151" y="1" width="75" height="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">elem...
...And 10 more matches

object-position - CSS: Cascading Style Sheets
the object-position css property specifies the alignment of the selected replaced element's contents within the element's box.
... the source for this interactive example is stored in a github repository.
... syntax /* <position> values */ object-position: center top; object-position: 100px 50px; /* global values */ object-position: inherit; object-position: initial; object-position: unset; values <position> from one to four values that define the 2d position of the element.
...And 10 more matches

Mail composition back end
nding messages nsimsgsend sending listener interfaces nsimsgsendlistener nsimsgcopyservicelistener copy operations copy to sent folder drafts templates "send later" sending unsent messages sending unsent messages listener quoting sample programs overview i've done considerable work in the past few weeks reorganizing the mail composition back end, so i thought it would be helpful to put together a small doc on the new interfaces and how one can use them.
... the mail composition back end is responsible for the assembly and creation of rfc822 messages to be delivered either via smtp or nntp services.
... ns_imethod createandsendmessage( nsieditorshell *aeditor, - the editor object for the mail compose operation.
...And 9 more matches

text-underline-position - CSS: Cascading Style Sheets
the text-underline-position css property specifies the position of the underline which is set using the text-decoration property's underline value.
... the source for this interactive example is stored in a github repository.
... syntax /* single keyword */ text-underline-position: auto; text-underline-position: under; text-underline-position: left; text-underline-position: right; /* multiple keywords */ text-underline-position: under left; text-underline-position: right under; /* global values */ text-underline-position: inherit; text-underline-position: initial; text-underline-position: unset; syntax values auto the user agent uses its own algorithm to place the line at or under the alphabetic baseline.
...And 9 more matches

Choosing between www and non-www URLs - HTTP
a recurring question among website owners is whether to choose non-www or www urls.
...this domain name is hosted on a server where the document resides.
... so, do i have to choose one or the other for my web site?
...And 9 more matches

Cross-Origin Resource Policy (CORP) - HTTP
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.
...cross-origin resource policy complements cross-origin read blocking (corb), which is a mechanism to prevent some cross-origin reads by default.
... history the concept was originally proposed in 2012 (as from-origin), but resurrected in q2 of 2018 and implemented in safari and chromium.
...And 9 more matches

Content-Disposition - HTTP
in a regular http response, the content-disposition response header is a header indicating if the content is expected to be displayed inline in the browser, that is, as a web page or as part of a web page, or as an attachment, that is downloaded and saved locally.
... in a multipart/form-data body, the http content-disposition general header is a header that can be used on the subpart of a multipart body to give information about the field it applies to.
...used on the body itself, content-disposition has no effect.
...And 9 more matches

Using cross commit - Archive of obsolete content
cross-commit is a script that allows a single patch to be easily checked in on multiple branches.
... getting the script "make -f client.mk pull_all" from a working copy of the trunk now pulls cross-commit, and that'll work on the 1.8 branch soon, too, so you might already have the script.
... if you don't, however, then from the parent directory of your source dir, do: cvs co mozilla/tools/cross-commit note that you will need to have $cvsroot and such set up correctly for this to work.
...And 8 more matches

OS.File.Error
instances of os.file.error are used by os.file to notify of file-related errors.
... using os.file.error example: finding out whether the problem is due to a file that does not exist try { let file = os.file.open("myfile.txt"); // ...
... } catch (ex) { if (ex instanceof os.file.error && ex.becausenosuchfile) { // the file does not exist } } global object os.file.error methods overview the following functions are utility functions that may be used to construct instances of os.file.error, setting the platform-specific error number.
...And 8 more matches

MediaStreamTrackAudioSourceNode - Web APIs
the mediastreamtrackaudiosourcenode interface is a type of audionode which represents a source of audio data taken from a specific mediastreamtrack obtained through the webrtc or media capture and streams apis.
... the audio itself might be input from a microphone or other audio sampling device, or might be received through a rtcpeerconnection, among other posible options.
... a mediastreamtrackaudiosourcenode has no inputs and exactly one output, and is created using the audiocontext.createmediastreamtracksource() method.
...And 8 more matches

:host() - CSS: Cascading Style Sheets
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.
...that's the job of :host-context().
...And 8 more matches

Allowing cross-origin use of images and canvas - HTML: Hypertext Markup Language
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.
... see cors settings attributes for details on how the crossorigin attribute is used.
... security and tainted canvases because the pixels in a canvas's bitmap can come from a variety of sources, including images or videos retrieved from other hosts, it's inevitable that security problems may arise.
...And 8 more matches

<feComposite> - SVG: Scalable Vector Graphics
the <fecomposite> svg filter primitive performs the combination of two input images pixel-wise in image space using one of the porter-duff compositing operations: over, in, atop, out, xor, and lighter.
...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 attrib...
...utes » filter primitive attributes » class style specific attributes in in2 operator k1 k2 k3 k4 dom interface this element implements the svgfecompositeelement interface.
...And 8 more matches

Add-on Repository
the add-on repository is responsible for finding available add-ons; it provides an interface for interacting with the addons.mozilla.org (amo) site.
... its api provides urls that can be visited to browse the repository's add-ons.
... the api also offers two ways to search for and retrieve an array of addon instances: retrieverecommendedaddons(), which returns a list of recommended add-ons, and searchaddons(), which performs a search of the repository.
...And 7 more matches

Compositing and clipping - Web APIs
this is more than adequate for most situations, but it limits the order in which composite shapes are built.
... we can, however, change this behaviour by setting the globalcompositeoperation property.
... globalcompositeoperation we can not only draw new shapes behind existing shapes but we can also use it to mask off certain areas, clear sections from the canvas (not limited to rectangles like the clearrect() method does) and more.
...And 7 more matches

Event.composedPath() - Web APIs
the composedpath() method of the event interface returns the event’s path which is an array of the objects on which listeners will be invoked.
... this does not include nodes in shadow trees if the shadow root was created with its shadowroot.mode closed.
... syntax var composed = event.composedpath(); parameters none.
...And 7 more matches

HTMLImageElement.crossOrigin - Web APIs
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.
... if you don't specify crossorigin, the image is fetched without cors (the fetch no-cors mode).
...And 7 more matches

Worker.prototype.postMessage() - Web APIs
the postmessage() method of the worker interface sends a message to the worker's inner scope.
... the worker can send back information to the thread that spawned it using the dedicatedworkerglobalscope.postmessage method.
... syntax worker.postmessage(message, [transfer]); parameters message the object to deliver to the worker; this will be in the data field in the event delivered to the dedicatedworkerglobalscope.onmessage handler.
...And 7 more matches

WritableStreamDefaultWriter.close() - Web APIs
the close() method of the writablestreamdefaultwriter interface closes the associated writable stream.
... the underlying sink will finish processing any previously-written chunks, before invoking the close behavior.
... syntax var promise = writablestreamdefaultwriter.close(); parameters none.
...And 7 more matches

BigInt.prototype.toString() - JavaScript
the tostring() method returns a string representing the specified bigint object.
... the source for this interactive example is stored in a github repository.
... syntax bigintobj.tostring([radix]) parameters radixoptional optional.
...And 7 more matches

Date.prototype.toString() - JavaScript
the tostring() method returns a string representing the specified date object.
... the source for this interactive example is stored in a github repository.
... syntax dateobj.tostring() return value a string representing the given date.
...And 7 more matches

Function.prototype.toString() - JavaScript
the tostring() method returns a string representing the source code of the function.
... the source for this interactive example is stored in a github repository.
... syntax function.tostring() return value a string representing the source code of the function.
...And 7 more matches

Number.prototype.toString() - JavaScript
the tostring() method returns a string representing the specified number object.
... the source for this interactive example is stored in a github repository.
... syntax numobj.tostring([radix]) parameters radix optional.
...And 7 more matches

Cross-domain Content Scripts - Archive of obsolete content
by default, content scripts don't have any cross-domain privileges.
... in particular, they can't: access content hosted in an iframe, if that content is served from a different domain make cross-domain xmlhttprequests however, you can enable these features for specific domains by adding them to your add-on's package.json under the "cross-domain-content" key, which itself lives under the "permissions" key: "permissions": { "cross-domain-content": ["http://example.org/", "http://example.com/"] } the domains listed must include the scheme and fully qualified domain name, and these must exactly match the domains serving the content - so in the example above, the content script will not be allowed to access content served from https://example.com/.
... cross-domain iframes the following "main.js" creates a page-worker which loads a local html file called "page.html", attaches a content script called "page.js" to the page, waits for messages from the script, and logs the payload.
...And 6 more matches

Stack Positioning - Archive of obsolete content
« previousnext » this section will describe how to position items in a stack.
... the position of a child element may be specified by placing two attributes on the element.
... for the horizontal position, use the left attribute and for the vertical position, use the top attribute.
...And 6 more matches

MDN Web Docs Glossary: Definitions of Web-related terms
this glossary provides definitions of words and abbreviations you need to know to successfully understand and build for the web.
... glossary of terms a abstraction accessibility accessibility tree (aom) adobe flash ajax algorithm alignment container alignment subject alpha (alpha channel) alpn api apple safari application context argument aria arpa arpanet array ascii asynchronous atag attribute b bandwidth base64 baseline beacon bézier curve bidi bigint blink block block (css) block (scripting) block cipher mode of operation boolean boot2gecko bootstrap boundi...
... canonical order canvas card sorting carddav caret cdn certificate authority certified challenge-response authentication character character encoding character set chrome cia cipher cipher suite ciphertext class client hints closure cms code splitting codec compile compile time computer programming conditional constant constructor continuous media control flow cookie copyleft cors cors-safelisted request header cors-safelisted response header crawler crlf ...
...And 6 more matches

JS_ValueToString
syntax jsstring * js_valuetostring(jscontext *cx, jsval v); name type description cx jscontext * the context in which to perform the conversion.
... description js_valuetostring converts a specified javascript value, v, to a string.
... it implements the tostring operator specified in ecma 262-3 §9.8.
...And 6 more matches

nsIMicrosummaryObserver
toolkit/components/places/public/nsimicrosummaryservice.idlscriptable this interface provides methods for observing changes to micrummaries.
... 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.
... since an observer might watch multiple microsummaries at the same time, the microsummary whose content has been updated gets passed to this handler.
...And 6 more matches

nsIMicrosummarySet
toolkit/components/places/public/nsimicrosummaryservice.idlscriptable this interface provides access to sets of microsummaries returned from the nsimicrosummaryservice.
... 1.0 66 introduced gecko 1.8 obsolete gecko 6.0 inherits from: nsisupports last changed in gecko 1.8 (firefox 1.5 / thunderbird 1.5 / seamonkey 1.0) warning: microsummary support was removed in gecko 6.0 (firefox 6.0 / thunderbird 6.0 / seamonkey 2.3) method overview void addobserver(in nsimicrosummaryobserver observer); nsisimpleenumerator enumerate(); void removeobserver(in nsimicrosummaryobserver observer); methods addobserver() add a microsummary observer to this microsummary set.
... adding an observer to a set is the equivalent of adding it to each constituent microsummary.
...And 6 more matches

Compositing example - Web APIs
this sample program demonstrates a number of compositing operations.
... the output looks like this: compositing example this code sets up the global values used by the rest of the program.
...t("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 content.', 'the new shape is drawn only where both the new shape and the destination canvas overlap.
...And 6 more matches

CompositionEvent - Web APIs
the dom compositionevent represents events that occur due to the user indirectly entering text.
... <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/event" target="_top"><rect x="1" y="1" width="75" height="50" fill="#fff" 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">event</text></a><polyline points="76,25 86,20 86,30 76,25" stroke="#d4dde4" fill="none"/><line x1="86" y1="25" x2="116" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/uievent" target="_t...
...op"><rect x="116" y="1" width="75" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="153.5" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">uievent</text></a><polyline points="191,25 201,20 201,30 191,25" stroke="#d4dde4" fill="none"/><line x1="201" y1="25" x2="231" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/api/compositionevent" target="_top"><rect x="231" y="1" width="160" height="50" fill="#f4f7f8" stroke="#d4dde4" stroke-width="2px" /><text x="311" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">compositionevent</text></a></svg></div> a:hover text { fill: #0095dd; point...
...And 6 more matches

GeolocationPositionError - Web APIs
the geolocationpositionerror interface represents the reason of an error occurring when using the geolocating device.
... properties the geolocationpositionerror interface doesn't inherit any property.
... geolocationpositionerror.code read only secure context returns an unsigned short representing the error code.
...And 6 more matches

Gyroscope - Web APIs
the gyroscope interface of the sensor apis provides on each reading the angular velocity of the device along all three axes.
... to use this sensor, the user must grant permission to the 'gyroscope' device sensor through the permissions api.
... constructor gyroscope.gyroscope() creates a new gyroscope object.
...And 6 more matches

IDBDatabase.close() - Web APIs
the close() method of the idbdatabase interface returns immediately and closes the connection in a separate thread.
... the connection is not actually closed until all transactions created using this connection are complete.
...methods that create transactions throw an exception if a closing operation is pending.
...And 6 more matches

PositionOptions - Web APIs
the positionoptions dictionary describes an object containing option properties to pass as a parameter of geolocation.getcurrentposition() and geolocation.watchposition().
... properties positionoptions.enablehighaccuracy secure context is a boolean that indicates the application would like to receive the best possible results.
... if true and if the device is able to provide a more accurate position, it will do so.
...And 6 more matches

:host-context() - CSS: Cascading Style Sheets
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.
... /* selects a shadow root host, only if it is a descendant of the selector argument given */ :host-context(h1) { font-weight: bold; } :host-context(main article) { font-weight: bold; } /* changes paragraph text color from black to white when a .dark-theme class is applied to the document body */ p { color: #000; } :host-context(body.dark-theme) p { color: #fff; } syntax :host-context( <compound-selector-li...
...And 6 more matches

ruby-position - CSS: Cascading Style Sheets
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).
... /* keyword values */ ruby-position: over; ruby-position: under; ruby-position: inter-character; /* global values */ ruby-position: inherit; ruby-position: initial; ruby-position: unset; syntax values over is a keyword indicating that the ruby has to be placed over the main text for horizontal scripts and right to it for vertical scripts.
...And 6 more matches

TypedArray.prototype.toString() - JavaScript
the tostring() method returns a string representing the specified array and its elements.
... this method has the same algorithm as array.prototype.tostring().
... the source for this interactive example is stored in a github repository.
...And 6 more matches

Communicating using "postMessage" - Archive of obsolete content
in most cases port is preferable to message events.
... handling message events in the content script to send a message from a content script, you use the postmessage function of the global self object: self.postmessage(contentscriptmessage); this takes a single parameter, the message payload, which may be any json-serializable value.
... handling message events in the add-on script to send a message to a content script, use the worker's postmessage function.
...And 5 more matches

Post data to window - Archive of obsolete content
this offers examples of sending post data to the server and displaying the server response.
... need more elaborate examples, examples of displaying the response in a new tab, in background tabs, and a link to using xmlhttprequest for post requests.
... preprocessing post data the apostdata argument of the (global) loaduri(), opendialog(), and (tab)browser.loaduriwithflags() methods expects the post data in the form of an nsiinputstream (because they eventually call nsiwebnavigation.loaduri()) while post data can be created using nsimimeinputstream.
...And 5 more matches

Gecko's "Almost Standards" Mode
as of mozilla 1.0.1 and 1.1 beta, there is a new rendering mode referred to as "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.
...this means that sliced-images-in-tables layouts are less likely to fall apart in gecko-based browsers based on the rendering engine found in mozilla 1.0.1 or later when in either "quirks" or "almost standards" mode.
...And 5 more matches

NSPR's Position On Abrupt Thread Termination
this memo describes my position on a facility that is currently under discussion for inclusion in the netscape portable runtime (nspr); the ability of a thread to abruptly exit.
...the process abstraction is then responsible for closing all open files and reclaiming all storage that may have been allocated during the process' lifetime.
...when called, the process exits, closing files and reclaiming the process' storage.
...And 5 more matches

PR_GetHostByAddr
looks up a host entry by its network address.
... syntax #include <prnetdb.h> prstatus pr_gethostbyaddr( const prnetaddr *hostaddr, char *buf, printn bufsize, prhostent *hostentry); parameters the function has the following parameters: hostaddr a pointer to the ip address of host in question.
... buf a pointer to a buffer, allocated by the caller, that is filled in with host data on output.
...And 5 more matches

IDBDatabase.onclose - Web APIs
the onclose event handler of the idbdatabase interface handles the close event, which is fired when the database is unexpectedly closed.
... this can happen, for example, when the application is shut down or access to the disk the database is stored on is lost while the database is open.
... the close event is fired after all transactions have been aborted and the connection has been closed.
...And 5 more matches

MediaStreamAudioSourceNode() - Web APIs
the web audio api's mediastreamaudiosourcenode() constructor creates and returns a new mediastreamaudiosourcenode object which uses the first audio track of a given mediastream as its source.
... note: another way to create a mediastreamaudiosourcenode is to call theaudiocontext.createmediastreamsource() method, specifying the stream from which you want to obtain audio.
... syntax audiosourcenode = new mediastreamaudiosourcenode(context, options); parameters context an audiocontext representing the audio context you want the node to be associated with.
...And 5 more matches

Node.compareDocumentPosition() - Web APIs
the node.comparedocumentposition() method reports the position of the given node relative to another node in any document — not just the given node’s document.
... the return value is a bitmask of the following values: name value document_position_disconnected 1 document_position_preceding 2 document_position_following 4 document_position_contains 8 document_position_contained_by 16 document_position_implementation_specific 32 syntax comparemask = node.comparedocumentposition(othernode) parameters othernode the other node with which to compare the first node’s document position.
... return value an integer value whose bits represent the othernode's relationship to the calling node.
...And 5 more matches

TreeWalker.whatToShow - Web APIs
the treewalker.whattoshow read-only property returns an unsigned long being a bitmask made of constants describing the types of node that must to be presented.
...the possible values are: constant numerical value description nodefilter.show_all -1 (that is the max value of unsigned long) shows all nodes.
...this is meaningful only when creating a treewalker with an attr node as its root; in this case, it means that the attribute node will appear in the first position of the iteration or traversal.
...And 5 more matches

Window.close() - Web APIs
the window.close() method closes the current window, or the window on which it was called.
...if the window was not opened by a script, an error similar to this one appears in the console: scripts may not close windows that were not opened by script.
... note also that close() has no effect when called on window objects returned by htmliframe​element​.content​window.
...And 5 more matches

XRFrame.getViewerPose() - Web APIs
the getviewerpose() method, a member of the xrframe interface, returns a xrviewerpose object which describes the viewer's pose (position and orientation) relative to the specified reference space.
... see the getpose() method for a way to calculate a pose that represents the difference between two spaces.
... syntax var xrviewerpose = xrframe.getviewerpose(referencespace); parameters referencespace an xrreferencespace object specifying the space to use as the reference point or base for the computation of the viewer's current pose.
...And 5 more matches

Box alignment for block, absolutely positioned and table layout - CSS: Cascading Style Sheets
in this page we explore how box alignment works in the context of block layout, including floated, positioned, and table elements.
... as this page aims to detail things which are specific to block layout and box alignment, it should be read in conjunction with the main box alignment page, which details the common features of box alignment across layout methods.
... absolutely positioned elements the alignment container is the positioned block, accounting for the offset values of top, left, bottom, and right.
...And 5 more matches

font-variant-position - CSS: Cascading Style Sheets
the font-variant-position css property controls the use of alternate, smaller glyphs that are positioned as superscript or subscript.
... the glyphs are positioned relative to the baseline of the font, which remains unchanged.
... /* keyword values */ font-variant-position: normal; font-variant-position: sub; font-variant-position: super; /* global values */ font-variant-position: inherit; font-variant-position: initial; font-variant-position: unset; when the usage of these alternate glyphs is activated, if one character in the run doesn't have such a typographically-enhanced glyph, the whole set of characters of the run is rendered using a fallback method, synthesizing these glyphs.
...And 5 more matches

offset-position - CSS: Cascading Style Sheets
the offset-position css property defines the initial position of the offset-path.
... syntax /* keyword values */ offset-position: auto; offset-position: top; offset-position: bottom; offset-position: left; offset-position: right; offset-position: center; /* <percentage> values */ offset-position: 25% 75%; /* <length> values */ offset-position: 0 0; offset-position: 1cm 2cm; offset-position: 10ch 8em; /* edge offsets values */ offset-position: bottom 10px right 20px; offset-position: right 3em bottom 10px; offset-position: bottom 10px right; offset-position: top right 10px; /* global values */ offset-position: inherit; offset-position: initial; offset-position: unset; values auto the initial position is the position of the box specified by the position property.
... <position> a <position>.
...And 5 more matches

HTML attribute: crossorigin - HTML: Hypertext Markup Language
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.
... the crossorigin content attribute on media elements is a cors settings attribute.
... these attributes are enumerated, and have the following possible values: keyword description anonymous cors requests for this element will have the credentials flag set to 'same-origin'.
...And 5 more matches

Cross-Origin-Embedder-Policy - HTTP
the http cross-origin-embedder-policy (coep) response header prevents a document from loading any cross-origin resources that don't explicitly grant the document permission (using corp or cors).
... header type response header forbidden header name no syntax cross-origin-embedder-policy: unsafe-none | require-corp directives unsafe-none this is the default value.
... allows the document to fetch cross-origin resources without giving explicit permission through the cors protocol or the cross-origin-resource-policy header.
...And 5 more matches

Cross-Origin-Opener-Policy - HTTP
the http cross-origin-opener-policy (coop) response header allows you to ensure a top-level document does not share a browsing context group with cross-origin documents.
... coop will process-isolate your document and potential attackers can't access to your global object if they were opening it in a popup, preventing a set of cross-origin attacks dubbed xs-leaks.
... if a cross-origin document with coop is opened in a new window, the opening document will not have a reference to it, and the window.opener property of the new window will be null.
...And 5 more matches

POST - HTTP
the http post method sends data to the server.
... the difference between put and post is that put is idempotent: calling it once or several times successively has the same effect (that is no side effect), where successive identical post may have additional effects, like passing an order several times.
... a post request is typically sent via an html form and results in a change on the server.
...And 5 more matches

Array.prototype.toString() - JavaScript
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.
... description the array object overrides the tostring method of object.
...And 5 more matches

Boolean.prototype.toString() - JavaScript
the tostring() method returns a string representing the specified boolean object.
... the source for this interactive example is stored in a github repository.
... syntax bool.tostring() return value a string representing the specified boolean object.
...And 5 more matches

Proposal - Archive of obsolete content
rss proposal list below is a list of proposals people or companies have made for rss.
... note: those in the list below that are marked "in development" should not be implemented.
...those labeled with "draft exists" can be implemented, but be warned that they could radically change.
...And 4 more matches

Test your skills: position - Learn web development
the aim of this task is to get you working with the css position property and values covered in our lesson on position.
... positioning one in this task you need to position the item with a class of target to the top and right of the container, which has the 5px grey border.
... for assessment or further work purposes, download the starting point for this task to work in your own editor or in an online editor.
...And 4 more matches

Vue conditional rendering: editing existing todos - Learn web development
data() { return { newlabel: this.label }; }, methods: { onsubmit() { if (this.newlabel && this.newlabel !== this.label) { this.$emit("item-edited", this.newlabel); } }, oncancel() { this.$emit("edit-cancelled"); } } }; </script> <style scoped> .edit-label { font-family: arial, sans-serif; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; color: #0b0c0c; display: block; margin-bottom: 5px; } input { display: inline-block; margin-top: 0.4rem; width: 100%; min-height: 4.4rem; padding: 0.4rem 0.8rem; border: 2px solid #565656; } form { display: flex; flex-direction: row; flex-wrap: wrap; } form > * { flex: 0 0 100%; } </style> note: walk through the above code then read the belo...
...we’ll also add a delete button since deletion is closely related.
... <button type="button" class="btn" @click="toggletoitemeditform"> edit <span class="visually-hidden">{{label}}</span> </button> <button type="button" class="btn btn__danger" @click="deletetodo"> delete <span class="visually-hidden">{{label}}</span> </button> </div> </div> </template> we’ve added a wrapper <div> around the whole template for layout purposes.
...And 4 more matches

Cross Process Object Wrappers
this document describes cross process object wrappers (cpows), which enable chrome code to synchronously access content in multiprocess firefox.
...as a migration aid, the messaging framework enables frame scripts to make content objects available to chrome through a wrapper called a cross process object wrapper, also known as a cpow.
...the optional third parameter to each of these functions is an object whose properties are objects to wrap.
...And 4 more matches

Interfacing with the Add-on Repository
the add-on repository javascript code module makes it easy for your extension to interface with the amo repository.
... importing the repository code module before you can use the add-on repository api, you need to import the code module: components.utils.import("resource://gre/modules/addonrepository.jsm"); having done this, you can then access the api through the resulting addonrepository object.
...rfaces.nsiprefservice); var prefbranch = prefsservice.getbranch("extensions."); var recurl = ""; try { recurl = prefbranch.getcharpref("getaddons.recommended.url"); } catch(e) { recurl = ""; } if (recurl == "") { prefbranch.setcharpref("getaddons.recommended.url", "https://services.addons.mozilla.org/%locale%/%app%/api/%api_version%/list/recommended/all/%max_results%/%os%/%version%?src=firefox"); prefsservice.savepreffile(null); } this fetches the value of the extensions.getaddons.recommended.url preference, and, if the preference doesn't exist or has no value, sets the value of the preference to the correct one for the amo site.
...And 4 more matches

PRHostEnt
this structure is output from pr_gethostbyname and pr_gethostbyaddr and passed to pr_enumeratehostent.
... syntax #include <prnetdb.h> typedef struct prhostent { char *h_name; char **h_aliases; #if defined(_win32) print16 h_addrtype; print16 h_length; #else print32 h_addrtype; print32 h_length; #endif char **h_addr_list; } prhostent; fields the structure has the following fields: h_name pointer to the official name of host.
... h_addrtype host address type.
...And 4 more matches

nsAutoString
class declaration nstautostring_chart subclass of nststring_chart that adds support for stack-based string allocation.
... names: nsautostring for wide characters nscautostring for narrow characters method overview constructors operator= get find rfind rfindchar findcharinset rfindcharinset equalsignorecase tofloat tointeger mid left right setcharat stripchars stripwhitespace replacechar replacesubstring trim compresswhitespace assignwithconversion appendwithconversion appendint appendfloat beginreading endreading beginwriting endwriting data length isempty isvoid isterminated ...
... methods constructors void nsautostring() - source constructors void nsautostring(prunichar) - source parameters prunichar c void nsautostring(const prunichar*, pruint32) - source parameters prunichar* data pruint32 length void nsautostring(const nsautostring&) - source parameters nsautostring& str void nsautostring(const nsastring_internal&) - source parameters nsastring_internal& str void nsautostring...
...And 4 more matches

nsCAutoString
class declaration nstautostring_chart subclass of nststring_chart that adds support for stack-based string allocation.
... names: nsautostring for wide characters nscautostring for narrow characters method overview constructors operator= get find rfind rfindchar findcharinset rfindcharinset compare equalsignorecase tofloat tointeger mid left right setcharat stripchars stripwhitespace replacechar replacesubstring trim compresswhitespace assignwithconversion appendwithconversion appendint ...
... methods constructors void nscautostring() - source constructors void nscautostring(char) - source parameters char c void nscautostring(const char*, pruint32) - source parameters char* data pruint32 length void nscautostring(const nscautostring&) - source parameters nscautostring& str void nscautostring(const nsacstring_internal&) - source parameters nsacstring_internal& str ...
...And 4 more matches

CanvasRenderingContext2D.closePath() - Web APIs
the canvasrenderingcontext2d.closepath() method of the canvas 2d api attempts to add a straight line from the current point to the start of the current sub-path.
... if the shape has already been closed or has only one point, this function does nothing.
... syntax void ctx.closepath(); examples closing a triangle this example creates the first two (diagonal) sides of a triangle using the lineto() method.
...And 4 more matches

CloseEvent() - Web APIs
the closeevent() constructor creates a new closeevent.
... syntax var event = new closeevent(typearg, closeeventinit); values typearg is a domstring representing the name of the event.
... closeeventinit optional is a closeeventinit dictionary, having the following fields: "wasclean", optional and defaulting to false, of type long, indicates if the connection has been closed cleanly or not.
...And 4 more matches

GeolocationPosition - Web APIs
the geolocationposition interface represents the position of the concerned device at a given time.
... the position, represented by a geolocationcoordinates object, comprehends the 2d position of the device, on a spheroid representing the earth, but also its altitude and its speed.
... properties the geolocationposition interface doesn't inherit any properties.
...And 4 more matches

MediaPositionState.duration - Web APIs
the mediapositionstate dictionary's duration property is used when calling the mediasession method setpositionstate() to provide the user agent with the overall total duration in seconds of the media currently being performed.
... for example, a browser might use this information along with the position property and the navigator.mediasession.playbackstate, as well as the session's metadata to provide an integrated common user interface showing the currently playing media as well as standard pause, play, forward, reverse, and other controls.
... syntax let positionstate = { duration: durationinseconds }; let durationinseconds = positionstate.duration; value a floating-point value indicating the overall duration, in seconds, of the media being performed.
...And 4 more matches

MediaSession.setPositionState() - Web APIs
the mediasession method setpositionstate() is used to update the current document's media playback position and speed for presentation by user's device in any kind of interface that provides details about ongoing media.
... syntax navigator.mediasession.setpositionstate(statedict); parameters statedict optional an object conforming to the mediapositionstate dictionary, providing updated information about the playback position and speed of the document's ongoing media.
... exceptions typeerror this error can occur in an array of circumstances: the specified mediapositionstate object's duration is missing, negative, or null.
...And 4 more matches

MediaStreamTrackAudioSourceNode() - Web APIs
the web audio api's mediastreamtrackaudiosourcenode() constructor creates and returns a new mediastreamtrackaudiosourcenode object whose audio is taken from the mediastreamtrack specified in the given options object.
... another way to create a mediastreamtrackaudiosourcenode is to call theaudiocontext.createmediastreamtracksource() method, specifying the mediastreamtrack from which you want to obtain audio.
... syntax audiotracknode = new mediastreamtrackaudiosourcenode(context, options); parameters context an audiocontext representing the audio context you want the node to be associated with.
...And 4 more matches

msPlayToSource - Web APIs
msplaytosource is a read-only property which gets the source associated with the media element for use by the playtomanager.
... this proprietary property is specific to internet explorer and microsoft edge.
... 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.
...And 4 more matches

NodeIterator.whatToShow - Web APIs
the nodeiterator.whattoshow read-only property represents an unsigned integer representing a bitmask signifying what types of nodes should be returned by the nodeiterator.
... syntax var nodetypes = nodeiterator.whattoshow; the values that can be combined to form the bitmask are: constant numerical value description nodefilter.show_all -1 (that is the max value of unsigned long) shows all nodes.
...this is meaningful only when creating a nodeiterator or treewalker with an attr node as its root; in this case, it means that the attribute node will appear in the first position of the iteration or traversal.
...And 4 more matches

OscillatorNode.setPeriodicWave() - Web APIs
the setperiodicwave() method of the oscillatornode interface is used to point to a periodicwave defining a periodic waveform that can be used to shape the oscillator's output, when type is custom.
... this replaces the now-obsolete oscillatornode.setwavetable().
... syntax oscillatornode.setperiodicwave(wave); parameters wave a periodicwave object representing the waveform to use as the shape of the oscillator's output.
...And 4 more matches

WebGLRenderingContext.isContextLost() - Web APIs
the webglrenderingcontext.iscontextlost() method returns a boolean indicating whether or not the webgl context has been lost and must be re-established before rendering can resume.
... syntax let islost = gl.iscontextlost(); return value a boolean which is true if the context is lost, or false if not.
... usage notes there are several reasons why a webgl context may be lost, making it necessary to re-establish the context before resuming rendering.
...And 4 more matches

XRPose - Web APIs
xrpose is a webxr api interface representing a position and orientation in the 3d space, relative to the xrspace within which it resides.
... the xrspace—which is either an xrreferencespace or an xrboundedreferencespace—defines the coordinate system used for the pose and, in the case of an xrviewerpose, its underlying views.
... to obtain the xrpose for the xrspace used as the local coordinate system of an object, call xrframe.getpose(), specifying that local xrspace and the space to which you wish to convert: thepose = xrframe.getpose(localspace, basespace); the pose for a viewer (or camera) is represented by the xrviewerpose subclass of xrpose.
...And 4 more matches

XRViewerPose.views - Web APIs
the read-only xrviewerpose property views returns an array which contains every xrview which must be rendered in order to fully represent the scene from the viewpoint defined by the viewer pose.
... for monoscopic devices, this array contains a single view.
... syntax let viewlist = xrviewerpose.views; value an array of xrview objects, one for each view available as part of the scene for the current viewer pose.
...And 4 more matches

:host - CSS: Cascading Style Sheets
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.
... /* selects a shadow root host */ :host { font-weight: bold; } syntax :host examples styling the shadow host the following snippets are taken from our host-selectors example (see it live also).
... 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'}); shadowroot.appendchild(style); shadowroot.appendchild(span); style.textcontent = 'span:hover { text-decoration: underline; }' + ':host-context(h1) { font-style: italic; }' + ':host-context(h1):after { content: " - no links in ...
...And 4 more matches

Cross-browser Flexbox mixins - CSS: Cascading Style Sheets
this article provides a set of mixins for those who want to mess around with flexbox using the native support of current browsers.
... this set uses: fallbacks using 2009 'box' syntax (ff and older webkit) and prefixed syntaxes (ie10, webkit browsers without flex wrapping) final standards syntax (ff, safari, chrome, ie11+, edge, opera) this was inspired by: http://dev.opera.com/articles/view/advanced-cross-browser-flexbox/ with help from: http://w3.org/tr/css3-flexbox/ http://the-echoplex.net/flexyboxes/ http://msdn.microsoft.com/en-us/library/ie/hh772069(v=vs.85).aspx http://css-tricks.com/using-flexbox/ a complete guide to flexbox | css-tricks visual guide to css3 flexbox: flexbox playground | note: mixins are not currently supported natively in browsers.
... instead, you will need to use a css pre-processor to make the most of the following.
...And 4 more matches

list-style-position - CSS: Cascading Style Sheets
the list-style-position css property sets the position of the ::marker relative to a list item.
... the source for this interactive example is stored in a github repository.
... note that there is variance among browsers regarding behavior when a block element is placed first within a list element declared as list-style-position: inside.
...And 4 more matches

mask-position - CSS: Cascading Style Sheets
the mask-position css property sets the initial position, relative to the mask position layer set by mask-origin, for each defined mask image.
... /* keyword values */ mask-position: top; mask-position: bottom; mask-position: left; mask-position: right; mask-position: center; /* <position> values */ mask-position: 25% 75%; mask-position: 0px 0px; mask-position: 10% 8em; /* multiple values */ mask-position: top right; mask-position: 1rem 1rem, center; /* global values */ mask-position: inherit; mask-position: initial; mask-position: unset; syntax one or more <position> values, separated by commas.
... values <position> one to four values representing a 2d position regarding the edges of the element's box.
...And 4 more matches

<noscript> - HTML: Hypertext Markup Language
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.
... 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.
... permitted parents any element that accepts phrasing content, if there are no ancestor <noscript> element, or in a <head> element (but only for an html document), here again if there are no ancestor <noscript> element.
...And 4 more matches

<summary>: The Disclosure Summary element - HTML: Hypertext Markup Language
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.
... the source for this interactive example is stored in a github repository.
...And 4 more matches

Math.acos() - JavaScript
the math.acos() function returns the arccosine (in radians) of a number, that is ∀x∊[-1;1],math.acos(x)=arccos(x)= the unique y∊[0;π]such thatcos(y)=x\forall x \in [{-1};1],\;\mathtt{\operatorname{math.acos}(x)} = \arccos(x) = \text{ the unique } \; y \in [0; \pi] \, \text{such that} \; \cos(y) = x the source for this interactive example is stored in a github repository.
... syntax math.acos(x) parameters x a number representing a cosine, where x is between -1 and 1.
... return value the arccosine (angle in radians) of the given number if it's between -1 and 1; otherwise, nan.
...And 4 more matches

Math.cos() - JavaScript
the math.cos() static function returns the cosine of the specified angle, which must be specified in radians.
... the source for this interactive example is stored in a github repository.
... syntax math.cos(x) parameters x the angle in radians for which to return the cosine.
...And 4 more matches

Symbol.toStringTag - JavaScript
the symbol.tostringtag well-known symbol is a string valued property that is used in the creation of the default string description of an object.
... it is accessed internally by the object.prototype.tostring() method.
... the source for this interactive example is stored in a github repository.
...And 4 more matches

panose-1 - SVG: Scalable Vector Graphics
the panose-1 attribute indicates the panose-1 number of a font face.
... panose-1 is an industry standard truetype font classification and matching technology.
... the panose system consists of a set of ten numbers that categorize the key attributes of a latin typeface, a classification procedure for creating those numbers, and mapper software that determines the closest possible font match given a set of typefaces.
...And 4 more matches

Positions - SVG: Scalable Vector Graphics
« previousnext » in this article, we examine how scalable vector graphics (svg) represents the positions and sizes of objects within a drawing context, including coordinate system and what a "pixel" measurement means in a scalable context.
...positions are then measured in pixels from the top left corner, with the positive x direction being to the right, and the positive y direction being to the bottom.
...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).
...And 4 more matches

close - Archive of obsolete content
the close event is executed when a request has been made to close the window when the user presses the close button.
... if an event handler is placed on the window element, it can be prevented to close (see example below).
... note that the close event is only fired when the user presses the close button on the titlebar; (i.e.
...And 3 more matches

Object.prototype.__noSuchMethod__ - Archive of obsolete content
the __nosuchmethod__ property used to reference a function to be executed when a non-existent method is called on an object, but this function is no longer available.
... while __nosuchmethod__ has been dropped, the ecmascript 2015 specification has the proxy object, with which you can achieve the below (and more).
... syntax obj.__nosuchmethod__ = fun parameters fun a function that takes the form function (id, args) { .
...And 3 more matches

CORS - MDN Web Docs Glossary: Definitions of Web-related terms
cors (cross-origin resource sharing) is a system, consisting of transmitting http headers, that determines whether browsers block frontend javascript code from accessing responses for cross-origin requests.
... the same-origin security policy forbids cross-origin access to resources.
... but cors gives web servers the ability to say they want to opt into allowing cross-origin access to their resources.
...And 3 more matches

Distributed Denial of Service - MDN Web Docs Glossary: Definitions of Web-related terms
a distributed denial-of-service (ddos) is an attack in which many compromised systems are made to attack a single target, in order to swamp server resources and block legitimate users.
...ddos concerns computer networks and cpu resource management.
... in a typical ddos attack, the assailant begins by exploiting a vulnerability in one computer system and making it the ddos master.
...And 3 more matches

Symbol - MDN Web Docs Glossary: Definitions of Web-related terms
symbol can have an optional description, but for debugging purposes only.
... in some programming languages, the symbol data type is referred to as an "atom." symbols don't "auto-convert" to strings most values in javascript support implicit conversion to a string.
... for instance, we can alert almost any value, and it will work.
...And 3 more matches

Localizing XLIFF files for iOS
firefox for ios uses the xliff xml-based file format to hold and transfer localization data.
...the goal of the standard is to have an xml-based format to use when exchanging localization data between tools without the potential of data loss or corruption.
... most translation tools support the xliff standard, making localizing the xliff files for firefox for ios easy to do using translation tools.
...And 3 more matches

PR_EnumerateHostEnt
evaluates each of the possible addresses of a prhostent structure, acquired from pr_gethostbyname or pr_gethostbyaddr.
... syntax #include <prnetdb.h> printn pr_enumeratehostent( printn enumindex, const prhostent *hostent, pruint16 port, prnetaddr *address); parameters the function has the following parameters: enumindex the index of the enumeration.
...to continue an enumeration (thereby getting successive addresses from the host entry structure), the value should be set to the function's last returned value.
...And 3 more matches

PR_GetHostByName
looks up a host by name.
... syntax #include <prnetdb.h> prstatus pr_gethostbyname( const char *hostname, char *buf, printn bufsize, prhostent *hostentry); parameters the function has the following parameters: hostname the character string defining the host name of interest.
... buf a pointer to a buffer, allocated by the caller, that is filled in with host data on output.
...And 3 more matches

JS::GetSelfHostedFunction
this article covers features introduced in spidermonkey 31 create a new javascript function that is implemented in self-hosted javascript.
... syntax jsfunction* js::getselfhostedfunction(jscontext* cx, const char* selfhostedname, js::handle<jsid> id, unsigned nargs); name type description cx jscontext* the context from which to get the function.
... selfhostedname const char* function name in the self-hosted javascript.
...And 3 more matches

Signing Mozilla apps for Mac OS X
mac os x's gatekeeper functionality prevents users from launching applications that haven't been code-signed, in order to help keep their computers secure.
...on mac os x, part of this infrastructure is automatic signing of the ".app" folder using apple's codesign tool.
... for projects that don't use mozilla's release automation and would like to be signed for secure launching on os 10.8 mountain lion and later, this guide should provide some insight into how to make sure applications are signed correctly using apple's codesign tool.
...And 3 more matches

NS_LossyConvertUTF16toASCII
class declaration a helper class that converts a utf-16 string to ascii in a lossy manner method overview constructors operator= get find rfind rfindchar findcharinset rfindcharinset compare equalsignorecase tofloat tointeger mid left right setcharat stripchars stripwhitespace replacechar replacesubstring trim compresswhitespace assignwithconversion appendwithconversion appendint appendfloat beginreading endreading beginwriting endwriting data length isempty isvoid isterminated charat operator[] first last countchar findchar equals equalsascii equalsliteral(const char equalsliteral(char lowercaseequal...
...onst char lowercaseequalsliteral(char assign assignascii assignliteral(const char assignliteral(char adopt replace replaceascii append appendascii appendliteral(const char appendliteral(char operator+= insert cut setcapacity setlength truncate getdata getmutabledata setisvoid stripchar base classes nscautostring data members no public members.
... methods constructors void ns_lossyconvertutf16toascii(const prunichar*) - source a helper class that converts a utf-16 string to ascii in a lossy manner parameters prunichar* astring void ns_lossyconvertutf16toascii(const prunichar*, pruint32) - source parameters prunichar* astring pruint32 alength void ns_lossyconvertutf16toascii(const nsastring_internal&) - source parameters nsastring_internal& astring operator= nscautostring& operator=(const nscautostring&) - source parameters nscautostring& str nscstring& operator=(const nscstring&) - source parameters nscstring& str nsacstring_internal& operator=(char) - source parameters char c nsacstring_internal& operator=(const char*) - source parameters char* data nsacstring_internal& operator=(co...
...And 3 more matches

AudioContext.close() - Web APIs
the close() method of the audiocontext interface closes the audio context, releasing any system audio resources that it uses.
... closed contexts cannot have new nodes created, but can decode audio data, create buffers, etc.
... syntax var audioctx = new audiocontext(); audioctx.close().then(function() { ...
...And 3 more matches

BudgetService.getCost() - Web APIs
the getcost() property of the budgetservice interface returns a promise that resolves to a double indicating the worst-case background operation cost of the provided background operation.
... syntax var apromise = budgetservice.getcost(operation); apromise.then(function(somedouble){ ...
... desktopmobilechromeedgefirefoxinternet exploreroperasafariandroid webviewchrome for androidfirefox for androidopera for androidsafari on iossamsung internetgetcost experimentaldeprecatednon-standardchrome full support 55edge full support ≤79firefox ?
...And 3 more matches

CSSPositionValue - Web APIs
the csspositionvalue interface of the the css typed object model api represents values for properties that take a position, for example object-position.
... constructor csspositionvalue.csspositionvalue() creates a new csspositionvalue object.
... properties csspositionvalue.x returns the item's position along the web page's horizontal axis.
...And 3 more matches

CanvasRenderingContext2D.globalCompositeOperation - Web APIs
the canvasrenderingcontext2d.globalcompositeoperation property of the canvas 2d api sets the type of compositing operation to apply when drawing new shapes.
... see also compositing and clipping in the canvas tutorial.
... syntax ctx.globalcompositeoperation = type; type is a string identifying which of the compositing or blending mode operations to use.
...And 3 more matches

DedicatedWorkerGlobalScope.postMessage() - Web APIs
the postmessage() method of the dedicatedworkerglobalscope interface sends a message to the main thread that spawned it.
... the main scope that spawned the worker can send back information to the thread that spawned it using the worker.postmessage method.
... syntax postmessage(amessage, transferlist); parameters amessage the object to deliver to the main thread; this will be in the data field in the event delivered to the worker.onmessage handler.
...And 3 more matches

DocumentOrShadowRoot.caretPositionFromPoint() - Web APIs
the caretpositionfrompoint() property of the documentorshadowroot interface returns a caretposition object, containing the dom node, along with the caret and caret's character offset within that node.
... syntax var caretposition = document.caretpositionfrompoint(float x, float y); parameters x the horizontal coordinate of a point.
... returns a caretposition object.
...And 3 more matches

Element.closest() - Web APIs
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.
... syntax var closestelement = targetelement.closest(selectors); parameters selectors is a domstring containing a selector list.
... ex: p:hover, .toto + q return value closestelement is the element which is the closest ancestor of the selected element.
...And 3 more matches

Geolocation.getCurrentPosition() - Web APIs
the geolocation.getcurrentposition() method is used to get the current position of the device.
... syntax navigator.geolocation.getcurrentposition(success[, error[, [options]]) parameters success a callback function that takes a geolocationposition object as its sole input parameter.
... error optional an optional callback function that takes a geolocationpositionerror object as its sole input parameter.
...And 3 more matches

Geolocation.watchPosition() - Web APIs
the geolocation method watchposition() method is used to register a handler function that will be called automatically each time the position of the device changes.
... syntax navigator.geolocation.watchposition(success[, error[, options]]) parameters success a callback function that takes a geolocationposition object as an input parameter.
... error optional an optional callback function that takes a geolocationpositionerror object as an input parameter.
...And 3 more matches

GeolocationPositionError.code - Web APIs
the geolocationpositionerror.code read-only property is an unsigned short representing the error code.
... syntax let typeerr = geolocationpositionerrorinstance.code value an unsigned short representing the error code.
... the following values are possible: value associated constant description 1 permission_denied the acquisition of the geolocation information failed because the page didn't have the permission to do it.
...And 3 more matches

GlobalEventHandlers.onclose - Web APIs
the onclose property of the globaleventhandlers mixin is an eventhandler for processing close events sent to a <dialog> element.
... the close event fires when the user closes a <dialog>.
... note: to handle the closing of a window, use onbeforeunload or onunload.
...And 3 more matches

HTMLDialogElement.close() - Web APIs
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.
...And 3 more matches

ImageCapture.getPhotoSettings() - Web APIs
the getphotosettings() method of the imagecapture interface returns a promise that resolves with a photosettings object containing the current photo configuration settings.
... syntax const settingspromise = imagecapture.getphotosettings() return value a promise that resolves with a photosettings object containing the following properties: filllightmode: the flash setting of the capture device, one of "auto", "off", or "on".
...the user agent selects the closest width value to this setting if it only supports discrete heights.
...And 3 more matches

MediaElementAudioSourceNode - Web APIs
the mediaelementaudiosourcenode interface represents an audio source consisting of an html5 <audio> or <video> element.
... constructor mediaelementaudiosourcenode() creates a new mediaelementaudiosourcenode object instance.
... mediaelement read only the htmlmediaelement used when constructing this mediastreamaudiosourcenode.
...And 3 more matches

MediaPositionState.playbackRate - Web APIs
the mediapositionstate dictionary's playbackrate property is used when calling the mediasession method setpositionstate() to tell the user agent the rate at which media is currently being played.
... for example, a browser might use this information along with the position property and the navigator.mediasession.playbackstate, as well as the session's metadata to provide an integrated common user interface showing the currently playing media as well as standard pause, play, forward, reverse, and other controls.
... syntax let positionstate = { playbackrate: rate }; let playbackrate = positionstate.playbackrate; value a floating-point value specifying a multiplier corresponding to the current relative rate at which the media being performed is playing.
...And 3 more matches

MediaPositionState - Web APIs
the media session api's mediapositionstate dictionary is used to represent the current playback position of a media session.
... its contents can be used by the user agent to provide a user interface displaying information about the playback position and duration of the media currently being performed.
...this should always be a positive number, with positive infinity (infinity) indicating media without a defined end, such as a live stream.
...And 3 more matches

PannerNode.positionY - Web APIs
the positiony property of the pannernode interface specifies the y coordinate of the audio source's position in 3d cartesian coordinates, corresponding to the vertical axis (top-bottom).
... the complete vector is defined by the position of the audio source, given as (positionx, positiony, positionz), and the orientation of the audio source (that is, the direction in which it's facing), given as (orientationx, orientationy, orientationz).
... syntax var positiony = pannernode.positiony; pannernode.positiony.value = newpositiony; value an audioparam whose value is the y coordinate of the audio source's position, in 3d cartesian coordinates.
...And 3 more matches

RTCDataChannel.onclose - Web APIs
the rtcdatachannel.onclose property is an eventhandler which specifies a function to be called by the browser when the close event is received by the rtcdatachannel.
... this is a simple event which indicates that the data channel has closed down.
... syntax rtcdatachannel.onclose = function; value a function which the browser will call to handle the close event.
...And 3 more matches

Selection.toString() - Web APIs
the selection.tostring() method returns a string currently being represented by the selection object, i.e.
... syntax sel.tostring() return value a string representing the selection.
... in javascript, this method is called automatically when a function the selection object is passed to requires a string: alert(window.getselection()) // what is called alert(window.getselection().tostring()) // what is actually being effectively called.
...And 3 more matches

WebSocket.close() - Web APIs
the websocket.close() method closes the websocket connection or connection attempt, if any.
... if the connection is already closed, this method does nothing.
... syntax websocket.close(); parameters code optional a numeric value indicating the status code explaining why the connection is being closed.
...And 3 more matches

Window.closed - Web APIs
the window.closed read-only property indicates whether the referenced window is closed or not.
... syntax const isclosed = windowref.closed; value a boolean.
... possible values: true: the window has been closed.
...And 3 more matches

XRFrame.getPose() - Web APIs
the xrframe method getpose() returns the relative position and orientation—the pose—of one xrspace to that of another space.
... for example, to get the position of a controller relative to the viewer's head, you would compare the controller's gripspace to the xrreferencespace of type viewer.
... syntax var xrpose = xrframe.getpose(space, basespace); parameters space an xrspace specifying the space for which to obtain an xrpose describing the item's position and orientation.
...And 3 more matches

Logical properties for floating and positioning - CSS: Cascading Style Sheets
the logical properties and values specification contains logical mappings for the physical values of float and clear, and also for the positioning properties used with positioned layout.
...ine-start clear: left clear: inline-end clear: right inset-inline-start left inset-inline-end right inset-block-start top inset-block-end bottom text-align: start text-align: left text-align: end text-align: right in addition to these mapped properties there are some additional shorthand properties made possible by being able to address block and inline dimensions.
... logical property purpose inset-inline sets both of the above inset values for the inline dimension simultaneously.
...And 3 more matches

text-emphasis-position - CSS: Cascading Style Sheets
the text-emphasis-position css property sets where emphasis marks are drawn.
... /* initial value */ text-emphasis-position: over right; /* keywords value */ text-emphasis-position: over left; text-emphasis-position: under right; text-emphasis-position: under left; text-emphasis-position: left over; text-emphasis-position: right under; text-emphasis-position: left under; /* global values */ text-emphasis-position: inherit; text-emphasis-position: initial; text-emphasis-position: unset; syntax values over draw marks over the text in horizontal writing mode.
... description the preferred position of emphasis marks depends on the language.
...And 3 more matches

Access-Control-Expose-Headers - HTTP
the access-control-expose-headers response header indicates which headers can be exposed as part of the response by listing their names.
... by default, only the 7 cors-safelisted response headers are exposed: cache-control content-language content-length content-type expires last-modified pragma if you want clients to be able to access other headers, you have to list them using the access-control-expose-headers header.
... header type response header forbidden header name no syntax access-control-expose-headers: <header-name>, <header-name>, ...
...And 3 more matches

Warning: expression closures are deprecated - JavaScript
the javascript warning "expression closures are deprecated" occurs when the non-standard expression closure syntax (shorthand function syntax) is used.
... message warning: expression closures are deprecated error type warning.
... the non-standard expression closure syntax (shorthand function syntax) is deprecated and shouldn't be used anymore.
...And 3 more matches

Date.prototype.toISOString() - JavaScript
the toisostring() method returns a string in simplified extended iso format (iso 8601), which is always 24 or 27 characters long (yyyy-mm-ddthh:mm:ss.sssz or ±yyyyyy-mm-ddthh:mm:ss.sssz, respectively).
... the source for this interactive example is stored in a github repository.
... syntax dateobj.toisostring() return value a string representing the given date in the iso 8601 format according to universal time.
...And 3 more matches

Intl.Locale.prototype.toString() - JavaScript
the intl.locale.prototype.tostring() returns the locale's full locale identifier string.
... the source for this interactive example is stored in a github repository.
... syntax locale.tostring() return value the locale's unicode locale identifier string.
...And 3 more matches

Math.acosh() - JavaScript
the math.acosh() function returns the hyperbolic arc-cosine of a number, that is ∀x≥1,math.acosh(x)=arcosh(x)= the unique y≥0such thatcosh(y)=x\forall x \geq 1, \mathtt{\operatorname{math.acosh}(x)} = \operatorname{arcosh}(x) = \text{ the unique } \; y \geq 0 \; \text{such that} \; \cosh(y) = x the source for this interactive example is stored in a github repository.
... syntax math.acosh(x) parameters x a number.
... return value the hyperbolic arc-cosine of the given number.
...And 3 more matches

RegExp.prototype.toString() - JavaScript
the tostring() method returns a string representing the regular expression.
... the source for this interactive example is stored in a github repository.
... syntax regexobj.tostring(); return value a string representing the given object.
...And 3 more matches

Symbol.prototype.toString() - JavaScript
the tostring() method returns a string representing the specified symbol object.
... the source for this interactive example is stored in a github repository.
... syntax symbol().tostring() return value a string representing the specified symbol object.
...And 3 more matches

position - XPath
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.
... syntax position() returns an integer equal to the context position from the expression evaluation context.
... notes note that a node's position in a context is not zero-based.
...And 3 more matches

Defining Cross-Browser Tooltips - Archive of obsolete content
learn how to define &quot;tooltips&quot; in a cross-browser, standards-friendly way.
... the solution the most obvious solution is to use the alt and title attributes for their intended purposes, instead of adhering to their historical misuses.
...authors who are faced with the prospect of editing a large collection of legacy documents should be able to convert their documents using a batch find-and-replace operation, for example substituting alt= for title=.
...And 2 more matches

XPJS Components Proposal - Archive of obsolete content
this is a proposal for a system that got implemented, but it may differ from the actual implementation.
... see the status document for more recent info on the status of this proposal.
... the overriding principle is to make this work as much like native components as possible.
...And 2 more matches

Custom app bundles for Mac OS X - Archive of obsolete content
mac os x applications are typically packaged as application bundles which are then distributed in .dmg (disk image) files.
... this tutorial will show you how to package your xulrunner-based application in a way which is consistent with the expectations of mac os x users.
...a xul application for mac os x should follow something similar to this basic directory structure: example.app/ contents/ info.plist (application bundle properties are specified in this xml file.) pkginfo (this is a simple text file and is created along with the info.plist file) macos/ (the macos folder will contain your xulrunner executable) xulrunner (this is the xulrunner stub) resources/ (this is where you place your xul application code and support files) application.ini (xulrunner-related application settings) example.icns (this is the icon whic...
...And 2 more matches

Writing a plugin for Mac OS X - Archive of obsolete content
this article is adapted from josh aas's blog post writing an npapi plugin for mac os x.
... the sample is posted under a bsd-style license that means you can use it for anything, even if you don't plan to release your source code.
... getting started if you check out the mozilla source code in mac os x, you can simply open basicplugin.xcodeproj in xcode, click build, and you're done.
...And 2 more matches

Denial of Service - MDN Web Docs Glossary: Definitions of Web-related terms
dos (denial of service) is a network attack that prevents legitimate use of server resources by flooding the server with requests.
...a dos attack consists of various techniques to exhaust these resources and make a server or a network unavailable to legitimate users, or at least make the server perform sluggishly.
... there are also distributed denial of service (ddos) attacks in which a multitude of servers are used to exhaust the computing capacity of an attacked computer.
...And 2 more matches

Gonk - MDN Web Docs Glossary: Definitions of Web-related terms
gonk is the lower-level operating system of firefox os and consists of a linux kernel (based on the android open source project (aosp)) and userspace hardware abstraction layer (hal).
...some other parts of the hal are shared with aosp: gps, camera, and others.
... gonk is a porting target of gecko (just as gecko has been ported to os x, windows, and android).
...And 2 more matches

Polyfill - MDN Web Docs Glossary: Definitions of Web-related terms
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.
...for example, the object.create polyfill only contains the functionalities that are possible in a non-native implementation of object.create.
...at the time, javascript developers were grasping at straws trying to get their website to work across all devices because there was such a discrepancy between browsers that the website might have to be programmed radically differently and have a much different user interface based upon the user's browser.
...And 2 more matches

Brotli - MDN Web Docs Glossary: Definitions of Web-related terms
brotli is a general-purpose lossless compression algorithm.
... it compresses data using a combination of a modern variant of the lz77 algorithm, huffman coding, and second-order context modeling, providing a compression ratio comparable to the best currently available general-purpose compression methods.
... brotli provides better compression ratios than gzip and deflate speeds are comparable, but brotli compressing is a slower process than gzip compression, so gzip may be a better option for the compression of non-cachable content.
...And 2 more matches

Cross browser testing - Learn web development
this module focuses on testing web projects across different browsers.
...what users, browsers, and devices do you most need to worry about?), how to go about doing testing, the main issues that you'll face with different types of code and how to mitigate them, what tools are most useful in helping you test and fix problems, and how to use automation to speed up testing.
... guides introduction to cross browser testing this article starts the module off by providing an overview of the topic of cross browser testing, answering questions such as "what is cross browser testing?", "what are the most common types of problems you'll encounter?", and "what are the main approaches for testing, identifying, and fixing problems?" strategies for carrying out testing next, we drill down into carrying out testing, looking at identifying a target ...
...And 2 more matches

Choosing the right memory allocator
allocating memory in xpcom these are general purpose memory-management routines that you should use unless your code falls into one of the other categories below.
... pr_alloc() (do not use, no users and only exists in /security/; use pr_malloc() instead) pr_malloc() == pr_malloc pr_calloc() == pr_calloc pr_realloc() == pr_realloc pr_free() pr_new (pass in a struct to allocate its size) pr_newzap (same as pr_new, but zeros memory) pr_delete (pr_free() and also clears the pointer) pr_freeif special cases pr_smprintf(), pr_sprintf_append(), pr_vsmprintf() and pr_vsprintf_append() must be freed with pr_smprintf_free() pl_strdup(), pl_strndup() must be freed with pl_strfree() nscrt::strdup/nscrt::strndup must be freed with nscrt::free allocating memory within plugins there are special memory allocatio...
... js_malloc() js_realloc() js_free() js_strdup() arena allocators nspr exposes arena allocators that can be used to efficiently allocate lots of small, uniformly sized objects.
...And 2 more matches

Debugging a hang on OS X (Archived)
this article contains historical information about older versions of os x.
... creating the sample on mac os x 10.5 (xcode < 4.2) when the application is still hung, open up spin control.app (it’s in your <tt>/developer/applications/performance tools/</tt> folder; if it is missing, install the latest computer hardware understanding development (chud) tools from apple).
... creating the sample on mac os x 10.4 when the application is still hung, open up sampler.app (it’s in your <tt>/developer/applications/performance tools/</tt> folder; if it is missing, install the latest computer hardware understanding development (chud) tools from apple.).
...And 2 more matches

JavaScript OS
the javascript os module contains tools that allow chrome content (i.e.
... platform and add-ons) to interact with the host operating system.
... os.constants os-related constants, including errors, file opening modes, system configuration, etc.
...And 2 more matches

PR_Close
closes a file descriptor.
... syntax #include <prio.h> prstatus pr_close(prfiledesc *fd); parameters the function has the following parameters: fd a pointer to a prfiledesc object.
... returns one of the following values: if file descriptor is closed successfully, pr_success.
...And 2 more matches

PR_GetOSError
returns the current thread's last set os-specific error code.
... syntax #include <prerror.h> print32 pr_getoserror(void) returns the value returned is a 32-bit signed number.
... description used for platform-specific code that requires the underlying os error.
...And 2 more matches

FC_CloseAllSessions
name fc_closeallsessions - close all sessions between an application and a token.
... syntax ck_rv fc_closeallsessions( ck_slot_id slotid ); parameters slotid [in] the id of the token's slot.
... description fc_closeallsessions closes all sessions between an application and the token in the slot with the id slotid.
...And 2 more matches

FOSS
wrappers / bindings c++ cocos2d-js - cocos2d-js is a cross-platform game engine which embeds spidermonkey, providing the same api for both web and native platforms.
... and above, has lots of goodies spiderape - the oldest c++ bindings for spidermonkey trixul - (trixul cvs) - trixul xml-based gui toolkit embeds spidermonkey, using javascript to implement logic behind its gui, supporting calls from javascript to c++ objects rust mozjs - rust bindings used by servo gnome gjs - javascript bindings to gnome (broadly, to any library using the gobject introspection mechanism) objective caml http://alain.frisch.fr/soft.html#spider - bindings to embed spidermonkey in ocaml applications perl http://jspl.msg.mx/ - bindings to cross-embed spidermonkey and perl.
...designed to supplement existing embeddings, gpsee ships with a sample trivial embedding, a scripting host, and an augmented version of mozilla's js shell.
...And 2 more matches

JS::ToString
syntax #include "js/conversions.h" // as of spidermonkey 38; previously in jsapi.h jsstring* js::tostring(jscontext *cx, js::handlevalue v) name type description cx jscontext * the context in which to perform the conversion.
... description js::tostring returns a string representation of a javascript value.
... if v.isstring() is true, it calls v.tostring().
...And 2 more matches

JS_EnterCrossCompartmentCall
this article covers features introduced in spidermonkey 1.8.1 js_entercrosscompartmentcall has been removed in bug 786068.
... syntax jscrosscompartmentcall * js_entercrosscompartmentcall(jscontext *cx, jsobject *target); name type description cx jscontext * the context on which a cross-compartment call is needed.
...any access to an object in a different compartment must be bracketed by calling js_entercrosscompartmentcall and js_leavecrosscompartmentcall.
...And 2 more matches

JS_EnumerateDiagnosticMemoryRegions
this article covers features introduced in spidermonkey 17 enumerate memory regions that contain diagnostic information..
... syntax void js_enumeratediagnosticmemoryregions(jsenumeratediagnosticmemorycallback callback); name type description callback jsenumeratediagnosticmemorycallback pointer to the new callback function to use.
... callback syntax typedef bool (* jsenumeratediagnosticmemorycallback)(void *ptr, size_t length); name type description ptr void * pointer to the allocated memory.
...And 2 more matches

JS_LeaveCrossCompartmentCall
this article covers features introduced in spidermonkey 1.8.1 js_leavecrosscompartmentcall has been removed in bug 786068.
... leave a the compartment, returning to the compartment active before the corresponding js_entercrosscompartmentcall.
... syntax void js_leavecrosscompartmentcall(jscrosscompartmentcall *call); name type description call jscrosscompartmentcall * value returned by previous call to js_entercrosscompartmentcall.
...And 2 more matches

nsIDOMGeoPositionCallback
the nsidomgeopositioncallback interface is called when updated position information is available.
... you need to implement this interface to accept callbacks after using nsidomgeolocation.watchposition().
... dom/interfaces/geolocation/nsidomgeopositioncallback.idlscriptable please add a summary to this article.
...And 2 more matches

AudioScheduledSourceNode.stop() - Web APIs
the stop() method on audioscheduledsourcenode schedules a sound to cease playback at the specified time.
... syntax audioscheduledsourcenode.stop([when]); parameters when optional the time, in seconds, at which the sound should stop playing.
... example this example demonstrates starting an oscillator node, scheduled to begin playing at once and to stop playing in one second.
...And 2 more matches

AudioScheduledSourceNode - Web APIs
the audioscheduledsourcenode interface—part of the web audio api—is a parent interface for several types of audio source node interfaces which share the ability to be started and stopped, optionally at specified times.
... you can't create an audioscheduledsourcenode object directly.
... instead, use the interface which extends it, such as audiobuffersourcenode, oscillatornode, and constantsourcenode.
...And 2 more matches

BaseAudioContext.createOscillator() - Web APIs
the createoscillator() method of the baseaudiocontext interface creates an oscillatornode, a source representing a periodic waveform.
... syntax var oscillatornode = audioctx.createoscillator(); returns an oscillatornode.
... example the following example shows basic usage of an audiocontext to create an oscillator node.
...And 2 more matches

CaretPosition - Web APIs
the caretposition interface represents the caret position, an indicator for the text insertion point.
... you can get a caretposition using the document.caretpositionfrompoint method.
... caretposition.offsetnode read only returns a node containing the found node at the caret's position.
...And 2 more matches

Client.postMessage() - Web APIs
the postmessage() method of the client interface allows a service worker to send a message to a client (a window, worker, or sharedworker).
... syntax client.postmessage(message[, transfer]); client.postmessage(message[, { transfer }]); parameters message the message to send to the client.
... // eg, if it's cross-origin.
...And 2 more matches

CompositionEvent.data - Web APIs
the data read-only property of the compositionevent interface returns the characters generated by the input method that raised the event; its exact nature varies depending on the type of event that generated the compositionevent object.
... syntax mydata = compositionevent.data value a domstring representing the event data: for compositionstart events, this is the currently selected text that will be replaced by the string being composed.
... this value doesn't change even if content changes the selection range; rather, it indicates the string that was selected when composition started.
...And 2 more matches

EventSource.close() - Web APIs
the close() method of the eventsource interface closes the connection, if one is made, and sets the eventsource.readystate attribute to 2 (closed).
... note: if the connection is already closed, the method does nothing.
... syntax eventsource.close(); parameters none.
...And 2 more matches

Gyroscope.x - Web APIs
the x read-only property of the gyroscope interface returns a double precision integer containing the angular velocity of the device along the its x axis.
... syntax var x = gyroscope.x value a number.
... example the gyroscope is typically read in the sensor.onreading event callback.
...And 2 more matches

Gyroscope.y - Web APIs
the y read-only property of the gyroscope interface returns a double precision integer containing the angular velocity of the device along the its y axis.
... syntax var y = gyroscope.y value a number.
... example the gyroscope is typically read in the sensor.onreading event callback.
...And 2 more matches

Gyroscope.z - Web APIs
the z read-only property of the gyroscope interface returns a double precision integer containing the angular velocity of the device along the its z axis.
... syntax var z = gyroscope.z value a number.
... example the gyroscope is typically read in the sensor.onreading event callback.
...And 2 more matches

IDBDatabase: close event - Web APIs
the close event is fired on idbdatabase when the database connection is unexpectedly closed.
... note that it is not fired if the database connection is closed normally using idbdatabase.close().
... bubbles no cancelable no interface event event handler property onerror examples this example opens a database and listens for the close event: // open the database const dbopenrequest = window.indexeddb.open('todolist', 4); dbopenrequest.onupgradeneeded = (event) => { const db = event.target.result; // create an objectstore for this database const objectstore = db.createobjectstore('todolist', { keypath: 'tasktitle' }); // define what data items the objectstore will contain objectstore.createindex('hours', 'hours', { unique: false }); objectstore.createindex('minutes', 'minutes', { unique: false }); objectstore.createindex('day', 'day', { unique: false }); objectstore.createindex('month', 'month', { unique: false ...
...And 2 more matches

MediaElementAudioSourceNode() - Web APIs
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

MediaStreamAudioSourceNode.mediaStream - Web APIs
the mediastreamaudiosourcenode interface's read-only mediastream property indicates the mediastream 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 mediastreamaudiosourcenode() constructor or the audiocontext.createmediastreamsource() method.
... syntax audiosourcestream = mediastreamaudiosourcenode.mediastream; value a mediastream representing the stream which contains the mediastreamtrack serving as the source of audio for the node.
...And 2 more matches

MessagePort.postMessage() - Web APIs
the postmessage() method of the messageport interface sends a message from the port, and optionally, transfers ownership of objects to other browsing contexts.
... syntax port.postmessage(message, transferlist); returns void.
...when the iframe has loaded, we pass messagechannel.port2 to the iframe using window.postmessage along with a message.
...And 2 more matches

Navigator.oscpu - Web APIs
the navigator.oscpu property returns a string that identifies the current operating system.
... syntax oscpuinfo = navigator.oscpu value a domstring providing a string which identifies the operating system on which the browser is running.
... operating system oscpuinfo string format os/2 os/2 warp x (either 3, 4 or 4.5) windows ce windowsce x.y1 windows 64-bit (64-bit build) windows nt x.y; win64; x64 windows 64-bit (32-bit build) windows nt x.y; wow64 windows 32-bit windows nt x.y mac os x (ppc build) powerpc mac os x version x.y mac os x (i386/x64 build) intel mac os x or macos version x.y linux 64-bit (32-bit build) output of uname -s plus "i686 on x86_64" linux output of uname -sm x.y refers to the version of the operating system example function osinfo() { alert(window.navigator.oscpu); } osinfo(); // alerts "windows nt 6.0" for example usage notes unless your code is privileged (chrome ...
...And 2 more matches

OscillatorNode.onended - Web APIs
the onended property of the oscillatornode interface is used to set the event handler for the ended event, which fires when the tone has stopped playing.
... syntax var oscillator = audioctx.createoscillator(); oscillator.onended = function() { ...
... }; example the following example shows basic usage of an audiocontext to create an oscillator node.
...And 2 more matches

OscillatorNode.start() - Web APIs
the start method of the oscillatornode interface specifies the exact time to start playing the tone.
... syntax oscillator.start(when); // start playing oscillator at the point in time specified by when parameters when optional an optional double representing the time (in seconds) when the oscillator should start, in the same coordinate system as audiocontext's currenttime attribute.
... if a value is not included or is less than currenttime, the oscillator starts playing immediately.
...And 2 more matches

OscillatorNode.stop() - Web APIs
the stop method of the oscillatornode interface specifies the time to stop playing the tone.
... syntax oscillator.stop(when); // stop playing oscillator at when parameters when optional an optional double representing the audio context time when the oscillator should stop.
...if the time is equal to or before the current audio context time, the oscillator will stop playing immediately.
...And 2 more matches

PannerNode.positionX - Web APIs
the positionx property of the pannernode interface specifies the x coordinate of the audio source's position in 3d cartesian coordinates, corresponding to the horizontal axis (left-right).
... the complete vector is defined by the position of the audio source, given as (positionx, positiony, positionz), and the orientation of the audio source (that is, the direction in which it's facing), given as (orientationx, orientationy, orientationz).
... syntax var positionx = pannernode.positionx; pannernode.positionx.value = newpositionx; value an audioparam whose value is the x coordinate of the audio source's position, in 3d cartesian coordinates.
...And 2 more matches

PannerNode.positionZ - Web APIs
the positionz property of the pannernode interface specifies the z coordinate of the audio source's position in 3d cartesian coordinates, corresponding to the depth axis (behind-in front of the listener).
... the complete vector is defined by the position of the audio source, given as (positionx, positiony, positionz), and the orientation of the audio source (that is, the direction in which it's facing), given as (orientationx, orientationy, orientationz).
... syntax var positionz = pannernode.positionz; pannernode.positionz.value = newpositionz; value an audioparam whose value is the z coordinate of the audio source's position, in 3d cartesian coordinates.
...And 2 more matches

PaymentAddress.postalCode - Web APIs
the postalcode read-only property of the paymentaddress interface returns a string containing a code used by a jurisdiction for mail routing, for example, the zip code in the united states or the postal index number (pin code) in india.
... syntax var paymentpostalcode = paymentaddress.postalcode; value a domstring which contains the postal code portion of the address.
... a postal code is a string (either numeric or alphanumeric) which is used by a postal service to optimize mail routing and delivery.
...And 2 more matches

RTCDataChannel.onclosing - Web APIs
the rtcdatachannel.onclosing property is an eventhandler which specifies a function to be called by the browser when the closing event is received by the rtcdatachannel.
... this is a simple event which indicates that the data channel is being closed, that is, rtcdatachannel transitions to "closing" state.
... for example, after rtcdatachannel.close() was called but the underlying data transport might not have been closed yet.
...And 2 more matches

RTCPeerConnection.close() - Web APIs
the rtcpeerconnection.close() method closes the current peer connection.
... syntax peerconnection.close(); this method has no parameters, and returns nothing.
...all rtcrtpsender objects are considered to be stopped once this returns (they may still be in the process of stopping, but for all intents and purposes, they're stopped).
...And 2 more matches

Range.toString() - Web APIs
the range.tostring() method is a stringifier returning the text of the range.
... alerting the contents of a range makes an implicit tostring() call, so comparing range and text through an alert dialog is ineffective.
... syntax text = range.tostring(); example html <p>this example logs <b>everything</b> between the bold <b>words</b>.
...And 2 more matches

ReadableStreamDefaultController.close() - Web APIs
the close() method of the readablestreamdefaultcontroller interface closes the associated stream.
... readers will still be able to read any previously-enqueued chunks from the stream, but once those are read, the stream will become closed.
... syntax readablestreamdefaultcontroller.close(); parameters none.
...And 2 more matches

ReadableStreamDefaultReader.closed - Web APIs
the closed read-only property of the readablestreamdefaultreader interface returns a promise that fulfills if the stream becomes closed or the reader's lock is released, or rejects if the stream errors.
... syntax var closed = readablestreamdefaultreader.closed; value a promise.
... examples in this snippet, a previously-created reader is queried to see if the stream has been closed.
...And 2 more matches

onnotificationclose - Web APIs
the serviceworkerglobalscope.onnotificationclose property is an event handler called whenever the notificationclose event is dispatched on the serviceworkerglobalscope object, that is when a user closes a displayed notification spawned by serviceworkerregistration.shownotification().
... notifications created on the main thread or in workers which aren't service workers using the notification() constructor will instead receive a close event on the notification object itself.
... syntax serviceworkerglobalscope.onnotificationclose = function(notificationevent) { ...
...And 2 more matches

WEBGL_lose_context - Web APIs
the webgl_lose_context extension is part of the webgl api and exposes functions to simulate losing and restoring a webglrenderingcontext.
... methods webgl_lose_context.losecontext() simulates losing the context.
... webgl_lose_context.restorecontext() simulates restoring the context.
...And 2 more matches

XRPose.transform - Web APIs
the transform read-only attribute of the xrpose interface is a xrrigidtransform object providing the position and orientation of the pose relative to the base xrspace as specified when the pose was obtained by calling xrframe.getpose().
... syntax let posetransform = xrpose.transform; value an xrrigidtransform which provides the position and orientation of the xrpose relative to the xrframe to which this xrpose is aligned.
... this is the same pose that's returned by the frame's getpose() method.
...And 2 more matches

-webkit-mask-composite - CSS: Cascading Style Sheets
the -webkit-mask-composite property specifies the manner in which multiple mask images applied to the same element are composited with one another.
... mask images are composited in the opposite order that they are declared with the -webkit-mask-image property.
... /* keyword values */ -webkit-mask-composite: clear; -webkit-mask-composite: copy; -webkit-mask-composite: source-over; -webkit-mask-composite: source-in; -webkit-mask-composite: source-out; -webkit-mask-composite: source-atop; -webkit-mask-composite: destination-over; -webkit-mask-composite: destination-in; -webkit-mask-composite: destination-out; -webkit-mask-composite: destination-atop; -webkit-mask-composite: xor; /* global values */ -webkit-mask-composite: inherit; -webkit-mask-composite: initial; -webkit-mask-composite: unset; there is a standardized mask-composite property covering parts of this non-standard property using different keywords.
...And 2 more matches

mask-composite - CSS: Cascading Style Sheets
the mask-composite css property represents a compositing operation used on the current mask layer with the mask layers below it.
... /* keyword values */ mask-composite: add; mask-composite: subtract; mask-composite: intersect; mask-composite: exclude; /* global values */ mask-composite: inherit; mask-composite: initial; mask-composite: unset; syntax one or more of the keyword values listed below, separated by commas.
... values for the composition the current mask layer is referred to as source, while all layers below it are referred to as destination.
...And 2 more matches

Host - HTTP
the host request header specifies the host and port number of the server to which the request is being sent.
... a host header field must be sent in all http/1.1 request messages.
... a 400 (bad request) status code may be sent to any http/1.1 request message that lacks a host header field or that contains more than one.
...And 2 more matches

X-Forwarded-Host - HTTP
the x-forwarded-host (xfh) header is a de-facto standard header for identifying the original host requested by the client in the host http request header.
... host names and ports of reverse proxies (load balancers, cdns) may differ from the origin server handling the request, in that case the x-forwarded-host header is useful to determine which host was originally used.
... this header is used for debugging, statistics, and generating location-dependent content and by design it exposes privacy sensitive information, such as the ip address of the client.
...And 2 more matches

Array.prototype.toSource() - JavaScript
the tosource() method returns a string representing the source code of the array.
... syntax arr.tosource() return value a string representing the source code of the array.
... description the tosource method returns the following values: for the built-in array object, tosource returns the following string indicating that the source code is not available: function array() { [native code] } for instances of array, tosource returns a string representing the source code.
...And 2 more matches

Error.prototype.toString() - JavaScript
the tostring() method returns a string representing the specified error object.
... syntax e.tostring() return value a string representing the specified error object.
... description the error object overrides the object.prototype.tostring() method inherited by all objects.
...And 2 more matches

Function.prototype.toSource() - JavaScript
the tosource() method returns a string representing the source code of the object.
...you can call tosource() while debugging to examine the contents of an object.
... syntax function.tosource(); return value a string representing the source code of the object.
...And 2 more matches

Math.cosh() - JavaScript
the math.cosh() function returns the hyperbolic cosine of a number, that can be expressed using the constant e: math.cosh(x)=ex+e-x2\mathtt{\operatorname{math.cosh(x)}} = \frac{e^x + e^{-x}}{2} the source for this interactive example is stored in a github repository.
... syntax math.cosh(x) parameters x a number.
... return value the hyperbolic cosine of the given number.
...And 2 more matches

String.prototype.toString() - JavaScript
the tostring() method returns a string representing the specified object.
... syntax str.tostring() return value a string representing the calling object.
... description the string object overrides the tostring() method of the object object; it does not inherit object.prototype.tostring().
...And 2 more matches

closemenu - Archive of obsolete content
« xul reference home closemenu type: one of the values below indicates if the menu closes when the menuitem is activated.
... auto this, the default value if the closemenu attribute is not specified, closes up the menu and all parent menus.
... single the menu the item is contained within is closed, but the parent menus remain open.
... none no menus are closed.

popup.position - Archive of obsolete content
« 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.
... this value can be specified either as a single word offering pre-defined alignment positions, or as 2 words specifying exactly which part of the anchor and popup should be aligned.
... positions specified as a single word string are shortcuts for the values above.
... for more details, including examples, please see popup positioning see also position ...

RadioStateChange - Archive of obsolete content
the radiostatechange event is executed when the state of a <radio> element has changed.
... this event is used mainly for an accessibility purpose.
... 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).
... cancelable read only boolean is it possible to cancel the event?

Compile - MDN Web Docs Glossary: Definitions of Web-related terms
some compilers which translate between similar level languages are called transpilers or cross-compilers, for instance to compile from typescript to javascript.
... those are considered productivity tools.
... most compilers work either ahead-of-time (aot) or just-in-time (jit).
...the most famous, "gcc" is one example.

Graceful degradation - MDN Web Docs Glossary: Definitions of Web-related terms
graceful degradation is a design philosophy that centers around trying to build a modern web site/application that will work in the newest browsers, but falls back to an experience that while not as good still delivers essential content and functionality in older browsers.
... polyfills can be used to build in missing features with javascript, but acceptable alternatives to features like styling and layout should be provided where possible, for example by using the css cascade, or html fallback behaviour.
... it is a useful technique that allows web developers to focus on developing the best possible websites, given that those websites are accessed by multiple unknown user-agents.
... progressive enhancement is related but different — often seen as going in the opposite direction to graceful degredation.

IDL - MDN Web Docs Glossary: Definitions of Web-related terms
content versus idl attributes in html, most attributes have two faces: the content attribute and the idl (interface definition language) attribute.
... most of the time, idl attributes will return their values as they are really used.
...most of the time, it will follow the rules laid out in the specification, but sometimes it doesn't.
... html specifications try to make this as developer-friendly as possible, but for various reasons (mostly historical), some attributes behave oddly (select.size, for example) and you should read the specifications to understand how exactly they behave.

JavaScript - MDN Web Docs Glossary: Definitions of Web-related terms
summary javascript (or "js") is a programming language used most often for dynamic client-side scripts on webpages, but it is also often used on the server-side, using a runtime such as node.js.
...javascript is one of the world's most commonly-used languages, owing to the recent growth and performance improvement of apis available in browsers.
...since then, the standardized javascript is called ecmascript and specified under ecma-262, whose latest (tenth, es2019) edition is available as of june 2019.
... recently, javascript's popularity has expanded even further through the successful node.js platform—the most popular cross-platform javascript runtime environment outside the browser.

Main Axis - MDN Web Docs Glossary: Definitions of Web-related terms
there are four possible values for flex-direction.
... these are: row row-reverse column column-reverse should you choose row or row-reverse then your main axis will run along the row in the inline direction.
... choose column or column-reverse and your main axis will run top to bottom of the page in the block direction.
... learn more property reference flex-basis flex-direction flex-grow flex-shrink justify-content flex further reading css flexbox guide: basic concepts of flexbox css flexbox guide: aligning items in a flex container css flexbox guide: controlling ratios of flex items along the main axis ...

Progressive Enhancement - MDN Web Docs Glossary: Definitions of Web-related terms
progressive enhancement is a design philosophy that provides a baseline of essential content and functionality to as many users as possible, while delivering the best possible experience only to users of the most modern browsers that can run all the required code.
...acceptable alternatives should be provided where possible.
... progressive enhancement is a useful technique that allows web developers to focus on developing the best possible websites while making those websites work on multiple unknown user agents.
... graceful degradation is related but is not the same thing and is often seen as going in the opposite direction to progressive enhancement.

State machine - MDN Web Docs Glossary: Definitions of Web-related terms
a state machine reads a set of inputs and changes to a different state based on those inputs.
...in a state diagram, circles represent each possible state and arrows represent transitions between states.
... there are two types of basic state machines: deterministic finite state machine this kind allows only one possible transition for any allowed input.
... this is like the "if" statement in that if x == true then dothis else dothat is not possible.

PR_CloseDir
closes the specified directory.
... syntax #include <prio.h> prstatus pr_closedir(prdir *dir); parameter the function has the following parameter: dir a pointer to a prdir structure representing the directory to be closed.
... description when a prdir object is no longer needed, it must be closed and freed with a call to pr_closedir call.
... note that after a pr_closedir call, any prdirentry object returned by a previous pr_readdir call on the same prdir object becomes invalid.

FC_CloseSession
name fc_closesession - close a session opened between an application and a token.
... syntax ck_rv fc_closesession( ck_session_handle hsession ); parameters hsession [in] the session handle to be closed.
... description fc_closesession closes a session between an application and a token.
... a user may call fc_closesession without logging into the token (to assume the nss user role).

JS::AutoSaveExceptionState
syntax js::autosaveexceptionstate(jscontext *cx); name type description cx jscontext * pointer to a js context from which to derive runtime information.
... description js::autosaveexceptionstate saves and later restores the current exception state of a given jscontext.
... example // typical usage: bool ok = js::evaluate(cx, ...); autosaveexceptionstate savedexc(cx); ...
...return ok; see also mxr id search for js::autosaveexceptionstate js_saveexceptionstate js_restoreexceptionstate js_dropexceptionstate bug 972319 ...

JS_GetExternalStringClosure
this article covers features introduced in spidermonkey 6 returns the string closure stored in a jsstring created by calling js_newexternalstringwithclosure.
... syntax void * js_getexternalstringclosure(jscontext *cx, jsstring *str); name type description cx jscontext * the context from which to retrieve the closure for a string.
... str jsstring * the string for which to return the closure.
... the result is null if the external string was created without one (that is, by calling js_newexternalstring rather than js_newexternalstringwithclosure).

JS_LooselyEqual
syntax bool js_looselyequal(jscontext *cx, js::handle<js::value> v1, js::handle<js::value> v2, bool *equal); name type description cx jscontext * the context in which to perform the conversion.
... description js_looselyequal determines if v1 is loosely equal to v2 under the javascript == operator, as specified in ecma 262-3 §11.9.3.
... comparing jsvals directly in c++, as in v1 == v2, does not produce a meaningful result, since it is possible for two distinct jsstrings or jsdoubles to represent the same string or number.
... see also mxr id search for js_looselyequal js_strictlyequal js_samevalue ...

JS_ValueToSource
syntax jsstring * js_valuetosource(jscontext *cx, js::handle<js::value> v); name type description cx jscontext * the context in which to perform the conversion.
... description js_valuetosource converts a specified javascript value, v, to a javascript source.
... on success, js_valuetosource returns a pointer to a string.
...this happens, for example, if v is an object and v.tosource() throws an exception.

GroupPosition
void groupposition( out long agrouplevel, out long asimilaritemsingroup, out long apositioningroup ); parameters agrouplevel 1-based, similar to aria aria-level property asimilaritemsingroup 1-based, similar to aria aria-setsize property, inclusive of the current item.
... apositioningroup 1-based, similar to aria aria-posinset property.
... remark alternatively this information is exposed by nsiaccessible.attribute attribute, also see group attributes page.
... refer to accessible web specifications to get an idea what elements expose group information.

nsIDOMGeoPositionAddress
dom/interfaces/geolocation/nsidomgeopositionaddress.idlscriptable this interface describes the geographical address of a location, including street, city, and country information, for example.
... 1.0 66 introduced gecko 1.9.2 obsolete gecko 14.0 inherits from: nsisupports last changed in gecko 11 (firefox 11 / thunderbird 11 / seamonkey 2.8) this object is obtained from an nsidomgeopositionaddress object via its address attribute.
... postalcode domstring the postal or zip code.
... historical note, which is likely of no interest to most readers: the types of the attributes below all changed from string to domstring in gecko 1.9.2 beta 5.

nsIDOMGeoPositionErrorCallback
the nsidomgeopositionerrorcallback interface is used to represent an object that receives callback notifications when geolocation errors occur.
... dom/interfaces/geolocation/nsidomgeopositionerrorcallback.idlscriptable please add a summary to this article.
... last changed in gecko 1.9.1 (firefox 3.5 / thunderbird 3.0 / seamonkey 2.0) method overview void handleevent(in nsidomgeopositionerror position); methods handleevent() called to handle a geolocation error.
... void handleevent( in nsidomgeoposition position ); parameters position the error that occurred, as an nsidomgeopositionerror object.

Reposition elements in the page - Firefox Developer Tools
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.

AddressErrors.postalCode - Web APIs
an object based on addresserrors includes a postalcode property when the address's postalcode property couldn't be validated.
... syntax var postcodeerror = addresserrors.postcode; value if the value specified in the paymentaddress object's postalcode property could not be validated, this property contains a domstring offering a human-readable explanation of the validation error and offers suggestions for correcting it.
... if the postalcode value was validated successfully, this property is not included in the addresserrors object.
... specifications specification status comment payment request apithe definition of 'addresserrors.postalcode' in that specification.

AudioScheduledSourceNode.start() - Web APIs
the start() method on audioscheduledsourcenode schedules a sound to begin playback at the specified time.
... syntax audioscheduledsourcenode.start([when [, offset [, duration]]]); parameters when optional the time, in seconds, at which the sound should begin to play.
... example this example demonstrates how to create an oscillatornode which is scheduled to start playing in 2 seconds and stop playing 1 second after that.
... context = new audiocontext(); osc = context.createoscillator(); osc.connect(context.destination); /* schedule the start and stop times for the oscillator */ osc.start(context.currenttime + 2); osc.stop(context.currenttime + 3); specifications specification status comment web audio apithe definition of 'start()' in that specification.

CSSPositionValue.x - Web APIs
the x property of the csspositionvalue interface returns returns the item's position along the web page's horizontal axis.
... syntax var x = csspositionvalue.x value a cssnumericvalue.
... example the following example positions a container <div> 5 pixels from the top and 10 pixels from the left of the page.
... 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
the y property of the csspositionvalue interface returns the item's position along the vertical axis.
... syntax var y = csspositionvalue.y value a cssnumericvalue.
... example the following example positions a container <div> 5 pixels from the top and 10 pixels from the left of the page.
... 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); ...

Document: lostpointercapture event - Web APIs
the lostpointercapture event is fired when a captured pointer is released.
... 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.
... when the user subsequently releases the pointer, the lostpointercapture event will be fired.
... const para = document.queryselector('p'); document.addeventlistener('lostpointercapture', () => { console.log('i\'ve been released!') }); para.addeventlistener('pointerdown', (event) => { para.setpointercapture(event.pointerid); }); the same example, but using the onlostpointercapture event handler property: const para = document.queryselector('p'); document.onlostpointercapture = () => { console.log('i\'ve been released!') }; para.addeventlistener('pointerdown', (event) => { para.setpointercapture(event.pointerid); }); specifications specification status pointer events obsolete ...

HTMLElement: lostpointercapture event - Web APIs
the lostpointercapture event is fired when a captured pointer is released.
... 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.
... when the user subsequently releases the pointer, the lostpointercapture event will be fired.
... const para = document.queryselector('p'); para.addeventlistener('lostpointercapture', () => { console.log('i\'ve been released!') }); para.addeventlistener('pointerdown', (event) => { para.setpointercapture(event.pointerid); }); the same example, but using the onlostpointercapture event handler property: const para = document.queryselector('p'); para.onlostpointercapture = () => { console.log('i\'ve been released!') }; para.addeventlistener('pointerdown', (event) => { para.setpointercapture(event.pointerid); }); specifications specification status pointer events obsolete ...

KeyboardEvent.isComposing - Web APIs
the keyboardevent.iscomposing read-only property returns a boolean value indicating if the event is fired within a composition session, i.e.
... after compositionstart and before compositionend.
... syntax var bool = event.iscomposing; example var kbdevent = new keyboardevent("synthetickey", false); console.log(kbdevent.iscomposing); // return false specifications specification status comment ui eventsthe definition of 'keyboardevent.prototype.iscomposing' in that specification.
... working draft document object model (dom) level 3 events specificationthe definition of 'keyboardevent.prototype.iscomposing' in that specification.

MediaElementAudioSourceNode.mediaElement - Web APIs
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.

MediaKeySession.closed - Web APIs
the mediakeysession.closed read-only property returns a promise signaling when a mediakeysession closes.
...closing a session means that licenses and keys associated with it are no longer valid for decrypting media data.
... syntax var promise = mediakeysessionobj.closed; value a promise.
... specifications specification status comment encrypted media extensionsthe definition of 'closed' in that specification.

MediaStreamTrackAudioSourceOptions.mediaStreamTrack - Web APIs
the mediastreamtrackaudiosourceoptions dictionary's mediastreamtrack property must contain a reference to the mediastreamtrack from which the mediastreamtrackaudiosourcenode being created using the mediastreamtrackaudiosourcenode() constructor.
... syntax mediastreamtrackaudiosourceoptions = { mediastreamtrack: audiosourcetrack; } mediastreamtrackaudiosourceoptions.mediastreamtrack = audiosourcetrack; value a mediastreamtrack from which the audio output of the new mediastreamtrackaudiosourcenode will be taken.
... example this example uses getusermedia() to obtain access to the user's camera, then creates a new mediastreamaudiosourcenode from the first audio track provided by the device.
... let audioctx = new (window.audiocontext || window.webkitaudiocontext)(); if (navigator.mediadevices.getusermedia) { navigator.mediadevices.getusermedia ( { audio: true, video: false }).then(function(stream) { let options = { mediastreamtrack: stream.getaudiotracks()[0]; } let source = new mediastreamtrackaudiosourcenode(audioctx, options); source.connect(audioctx.destination); }).catch(function(err) { console.log('the following gum error occured: ' + err); }); } else { console.log('new getusermedia not supported on your browser!'); } specifications specification status comment web audio apithe definition of 'mediastreamtrackaudiosourceoptions.mediastream' in that specification.

Notification.close() - Web APIs
the close() method of the notification interface is used to close/remove a previously displayed notification.
... syntax notification.close(); parameters none.
...at the end of the function, it also calls close() inside a addeventlistener() function to remove the notification when the relevant content has been read on the webpage.
... n.close(); } }); } specifications specification status comment notifications api living standard living standard ...

OscillatorNode.detune - Web APIs
the detune property of the oscillatornode interface is an a-rate audioparam representing detuning of oscillation in cents.
... syntax var oscillator = audioctx.createoscillator(); oscillator.detune.setvalueattime(100, audioctx.currenttime); // value in cents note: though the audioparam returned is read-only, the value it represents is not.
... example the following example shows basic usage of an audiocontext to create an oscillator node.
... // create web audio api context var audioctx = new (window.audiocontext || window.webkitaudiocontext)(); // create oscillator node var oscillator = audioctx.createoscillator(); oscillator.type = 'square'; oscillator.frequency.setvalueattime(440, audioctx.currenttime); // value in hertz oscillator.detune.setvalueattime(100, audioctx.currenttime); // value in cents oscillator.start(); specifications specification status comment web audio apithe definition of 'detune' in that specification.

OscillatorNode.frequency - Web APIs
the frequency property of the oscillatornode interface is an a-rate audioparam representing the frequency of oscillation in hertz.
... syntax var oscillator = audioctx.createoscillator(); oscillator.frequency.setvalueattime(440, audioctx.currenttime); // value in hertz note: though the audioparam returned is read-only, the value it represents is not.
... example the following example shows basic usage of an audiocontext to create an oscillator node.
... // create web audio api context var audioctx = new (window.audiocontext || window.webkitaudiocontext)(); // create oscillator node var oscillator = audioctx.createoscillator(); oscillator.type = 'square'; oscillator.frequency.setvalueattime(440, audioctx.currenttime); // value in hertz oscillator.start(); specifications specification status comment web audio apithe definition of 'frequency' in that specification.

OscillatorNode.type - Web APIs
the type property of the oscillatornode interface specifies what shape of waveform the oscillator will output.
... syntax oscillatornode.type = type; value a domstring specifying the shape of oscillator wave.
... example the following example shows basic usage of an audiocontext to create an oscillator node.
... // create web audio api context var audioctx = new (window.audiocontext || window.webkitaudiocontext)(); // create oscillator node var oscillator = audioctx.createoscillator(); oscillator.type = 'square'; oscillator.frequency.setvalueattime(440, audioctx.currenttime); // value in hertz oscillator.start(); specifications specification status comment web audio apithe definition of 'type' in that specification.

PositionOptions.maximumAge - Web APIs
the positionoptions.maximumage property is a positive long value indicating the maximum age in milliseconds of a possible cached position that is acceptable to return.
... if set to 0, it means that the device cannot use a cached position and must attempt to retrieve the real current position.
... if set to infinity the device must return a cached position regardless of its age.
... syntax positionoptions.maximumage = timelength specifications specification status comment geolocation apithe definition of 'positionoptions.maximumage' in that specification.

RTCDataChannel: close event - Web APIs
the close event is sent to the onclose event handler on an rtcdatachannel instance when the data transport being used for the data channel has closed.
... 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.
... dc.addeventlistener("close", ev => { messageinputbox.disabled = true; sendbutton.disabled = true; connectbutton.disabled = false; disconnectbutton.disabled = true; }, false); all this code does in response to receiving the close event is to disable an input box and its "send" button, and to enable the button used to start a call (while disabling the one that ends a call).
... you can also use the onclose event handler property to set a handler for close events: dc.onclose = ev => { messageinputbox.disabled = true; sendbutton.disabled = true; connectbutton.disabled = false; disconnectbutton.disabled = true; } specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'close' in that specification.

ReadableByteStreamController.close() - Web APIs
the close() method of the readablebytestreamcontroller interface closes the associated stream.
... note: readers will still be able to read any previously-enqueued chunks from the stream, but once those are read, the stream will become closed.
... syntax readablebytestreamcontroller.close(); parameters none.
... specifications specification status comment streamsthe definition of 'close()' in that specification.

URLUtilsReadOnly.host - Web APIs
the urlutilsreadonly.host read-only property returns a domstring containing the host, that is the hostname, a ':', and the port of the url.
... syntax string = object.host; examples // in a web worker, on the page https://developer.mozilla.org/urlutilsreadonly.host var result = window.self.host; // returns:'developer.mozilla.org:80' specifications specification status comment urlthe definition of 'urlutilsreadonly.host' in that specification.
... desktopmobilechromeedgefirefoxinternet exploreroperasafariandroid webviewchrome for androidfirefox for androidopera for androidsafari on iossamsung internethost experimentalchrome no support noedge no support nofirefox full support 3.5ie no support noopera no support nosafari no support ...
... nowebview android no support nochrome android no support nofirefox android full support 4opera android no support nosafari ios no support nosamsung internet android no support nolegend full support full support no support no supportexperimental.

URLUtilsReadOnly.hostname - Web APIs
the urlutilsreadonly.hostname read-only property returns a domstring containing the domain of the url.
... syntax string = object.hostname; examples // in a web worker, on the page https://developer.mozilla.org/urlutilsreadonly.hostname var result = window.self.hostname; // returns:'developer.mozilla.org' specifications specification status comment urlthe definition of 'urlutilsreadonly.hostname' in that specification.
... desktopmobilechromeedgefirefoxinternet exploreroperasafariandroid webviewchrome for androidfirefox for androidopera for androidsafari on iossamsung internethostname experimentalchrome no support noedge no support nofirefox full support 3.5ie no support noopera no support nosafari no support ...
... nowebview android no support nochrome android no support nofirefox android full support 4opera android no support nosafari ios no support nosamsung internet android no support nolegend full support full support no support no supportexperimental.

URLUtilsReadOnly.toString() - Web APIs
the urlutilsreadonly.tostring() stringifier method returns a domstring containing the whole url.
... syntax string = object.tostring(); examples // in a web worker, on the page https://developer.mozilla.org/urlutilsreadonly.href var result = window.self.tostring(); // returns:'https://developer.mozilla.org/urlutilsreadonly.href' browser compatibility the compatibility table in this page is generated from structured data.
... desktopmobilechromeedgefirefoxinternet exploreroperasafariandroid webviewchrome for androidfirefox for androidopera for androidsafari on iossamsung internettostring experimentalchrome no support noedge no support nofirefox full support 3.5ie no support noopera no support nosafari no support nowebview android no support nochrome android no...
... support nofirefox android full support 4opera android no support nosafari ios no support nosamsung internet android no support nolegend full support full support no support no supportexperimental.

validityState.tooShort - Web APIs
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.
... specifications specification status comment html living standardthe definition of 'validitystate.tooshort' in that specification.
... living standard html 5.1the definition of 'validitystate.tooshort' in that specification.
... recommendation html5the definition of 'validitystate.tooshort' in that specification.

WebSocket: close event - Web APIs
the close event is fired when a connection with a websocket is closed.
... bubbles no cancelable no interface closeevent event handler property onclose examples you might want to know when the connection has been closed so that you can update the ui or, perhaps, save data about the closed connection.
... given that you have a variable called examplesocket that refers to an opened websocket, this handler would handle the situation where the socket has been closed.
... examplesocket.addeventlistener('close', (event) => { console.log('the connection has been closed successfully.'); )}; you can perform the same actions using the event handler property, like this: examplesocket.onclose = function (event) { console.log('the connection has been closed successfully.'); }; specifications specification status html living standardthe definition of 'websocket close' in that specification.

WebSocket.onclose - Web APIs
the websocket.onclose property is an eventhandler that is called when the websocket connection's readystate changes to closed.
... it is called with a closeevent.
... syntax awebsocket.onclose = function(event) { console.log("websocket is closed now."); }; value an eventlistener.
... specifications specification status comment html living standardthe definition of 'websocket: onclose' in that specification.

WritableStreamDefaultWriter.closed - Web APIs
the closed read-only property of the writablestreamdefaultwriter interface returns a promise that fulfills if the stream becomes closed or the writer's lock is released, or rejects if the stream errors.
... syntax var closed = writablestreamdefaultwriter.closed; value a promise.
... }, close(controller) { ...
... // check if the stream is closed writer.closed.then(() => { console.log('writer closed'); }) specifications specification status comment streamsthe definition of 'closed' in that specification.

XMLSerializer.serializeToString() - Web APIs
the xmlserializer method serializetostring() constructs a string representing the specified dom tree in xml form.
... syntax xmlstring = anxmlserializer.serializetostring(rootnode); parameters rootnode the node to use as the root of the dom tree or subtree for which to construct an xml representation.
... 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.
... specifications specification status comment dom parsing and serializationthe definition of 'serializetostring()' in that specification.

Cross-Origin-Resource-Policy - HTTP
note: due to a bug in chrome, setting cross-origin-resource-policy can break pdf rendering, preventing visitors from being able to read past the first page of some pdfs.
... due to a bug in firefox, setting cross-origin-resource-policy can prevent some resources (such as pdfs) from being downloaded in some circumstances.
... the http cross-origin-resource-policy response header conveys a desire that the browser blocks no-cors cross-origin/cross-site requests to the given resource.
... header type response header forbidden header name no syntax cross-origin-resource-policy: same-site | same-origin | cross-origin examples the response header below will cause compatible user agents to disallow cross-origin no-cors requests: cross-origin-resource-policy: same-origin for more examples, see https://resourcepolicy.fyi/.

Error.prototype.toSource() - JavaScript
the tosource() method returns code that could eval to the same error.
... syntax e.tosource() return value a string containing the source code of the error.
... examples using tosource calling the tosource method of an error instance (including nativeerrors) will return a string containing the source code of the error.
... note: be aware that the properties used by the tosource method in the creation of this string are mutable and may not accurately reflect the function used to create an error instance or the filename or line number where the actual error occurred.

<menclose> - MathML
the mathml <menclose> element renders its content inside an enclosing notation specified by the notation attribute.
...possible values are: value sample rendering rendering in your browser description longdiv (default) a2 + b2 long division symbol actuarial a2 + b2 actuarial symbol radical a2 + b2 square root symbol.
... a2 + b2 vertical strikeout line through contents horizontalstrike a2 + b2 horizontal strikeout line through contents madruwb a2 + b2 arabic factorial symbol updiagonalarrow a2 + b2 diagonal arrow phasorangle a2 + b2 phasor angle examples <math> <menclose notation="circle box"> <mi> x </mi> <mo> + </mo> <mi> y </mi> </menclose> </math> specifications specification status comment mathml 3.0the definition of 'menclose' in that specification.
... recommendation current specification mathml 2.0the definition of 'menclose' in that specification.

Modifying the Page Hosted by a Tab - Archive of obsolete content
to modify the page hosted by a particular tab, load one or more content scripts into it using attach() method of tab object.
...it has a click handler which fetches the active tab and loads a script into the page hosted by the active tab.
...to do this, provide option contentscriptfile not contentscript, whose value is a url pointing to one or more content script files.

JSS build instructions for OSX 10.6 - Archive of obsolete content
the generic instructions didn't work to build on osx 10.6.7.
... howto successfully compile jss and nss for 32 and 64 bits on osx 10.6 (10.6.7) useful links: https://developer.mozilla.org/en/nss_reference/building_and_installing_nss/build_instructions https://developer.mozilla.org/jss_build_4.3.html ftp://ftp.mozilla.org/pub/mozilla.org/ <componente> /releases http://www.mozilla.org/projects/secu...using_jss.html steps: export all this: build_opt="1" cvsroot=":pserver:anonymous@cvs-mirror.mozilla.org:/cvsroot" java_home=$(/usr/libexec/java_home") no_mdupdate="1" nsdistmode="copy" ns_use_gcc="1" create working dir: mkdir nss-jss cd nss-jss obtain source: altought manual said nspr_4_6_4_rtm, nss_3_11_4_rtm, jss_4_2_5_rtm, they didnt work for osx, giving many compiling errors.
... cvs login cvs co -r nspr_4_8_7_rtm nspr cvs co -r nss_3_12_9_with_ckbi_1_82_rtm nss cvs co -r jss_4_3_2_rtm jss build nss for 32 and 64: cd mozilla/security/nss make nss_build_all cc="gcc -arch i386" ccc="g++ -arch i386" make nss_build_all use_64=1 build jss for 32 and 64: cd ../jss make cc="gcc -arch i386" ccc="g++ -arch i386" make use_64=1 on osx, java.library.path doesnt seem to have /usr/lib or other paths.

JavaScript OS.Shared - Archive of obsolete content
module os.shared contains tools to interact with the operating system (and, more generally, in c) in javascript.
...for the moment, module os.shared is accessible only from chrome workers.
... global object os.shared.type properties void_t voidptr_t char jschar int unsigned_int int32_t uint32_t int64_t uint64_t long bool off_t size_t ssize_t fd (unix only) negativeone_or_fd (unix only) negativeone_or_nothing (unix only) string (unix only) null_or_string (unix only) handle (windows only) maybe_handle (windows only) dword (windows only) negative_or_dword (windows only) zero_or_dword (windows only) zero_or_nothing (windows only) declareffi() intn_t() uintn_t()instances of os.shared.type convert_from_c() releasewith() attributes global object os.shared.hollowstructure in_ptr out_ptr inout_ptr ...

closebutton - Archive of obsolete content
« xul reference home closebutton obsolete since gecko 1.9.2 type: boolean if this attribute is set to true, the tabs row will have a "new tab" button and "close" button on the ends.
... this feature is used by the tabbrowser to provide the facilities for adding and closing tabs.
... you can set an image to the "new tab" and "close" buttons by applying them to the tabs-newbutton and tabs-closebutton classes respectively.

XUL Booster - Archive of obsolete content
xul booster is a third party eclipse / webtools build that offers some support for xul editing and awesome support for extension packaging.
... extension quick start xul booster makes creating and packaging an extension very easy.
...download visit xulbooster at sourceforge.net ...

CDN - MDN Web Docs Glossary: Definitions of Web-related terms
these servers store duplicate copies of data so that servers can fulfill data requests based on which servers are closest to the respective end-users.
...using cdn for those library files is preferable for a number of reasons: serving libraries' static assets over cdn lowers the request burden on an organization's own servers.
... most cdns have servers all over the globe, so cdn servers may be geographically nearer to your users than your own servers.

Endianness - MDN Web Docs Glossary: Definitions of Web-related terms
by far the most common ordering of multiple bytes in one number is the little-endian, which is used on all intel processors.
... little-endian means storing bytes in order of least-to-most-significant (where the least significant byte takes the first or lowest address), comparable to a common european way of writing dates (e.g., 31 december 2050).
... naturally, big-endian is the opposite order, comparable to an iso date (2050-12-31).

FTP - MDN Web Docs Glossary: Definitions of Web-related terms
ftp (file transfer protocol) was the standard protocol for many years for transferring files from one host to another over the internet.
... increasingly, though, teams and hosting accounts don't allow ftp and instead rely on a version control system like git.
... you will still find it used on older hosting accounts, but it is safe to say that ftp is no longer considered best practice.

Gecko - MDN Web Docs Glossary: Definitions of Web-related terms
gecko is the layout engine developed by the mozilla project and used in many apps/devices, including firefox and firefox os.
...besides this, gecko makes sure associated apis work well on every operating system gecko supports, and that appropriate apis are exposed only to relevant support targets.
... since all firefox os apps are web apps, firefox os uses gecko as its app runtime as well.

Idempotent - MDN Web Docs Glossary: Definitions of Web-related terms
implemented correctly, the get, head, put, and delete method are idempotent, but not the post method.
...called several times in a row, the client gets the same results: get /pagex http/1.1 get /pagex http/1.1 get /pagex http/1.1 get /pagex http/1.1 post /add_row http/1.1 is not idempotent; if it is called several times, it adds several rows: post /add_row http/1.1 post /add_row http/1.1 -> adds a 2nd row post /add_row http/1.1 -> adds a 3rd row delete /idx/delete http/1.1 is idempotent, even if the returned status code may change between requests: delete /idx/delete http/1.1 -> returns 200 if idx exists delete /idx/delete http/1.1 -...
... technical knowledge description of common idempotent methods: get, head, put, delete, options, trace description of common non-idempotent methods: post,patch, connect ...

Intrinsic Size - MDN Web Docs Glossary: Definitions of Web-related terms
for text the min-content size would be if the text wrapped as small as it can in the inline direction without causing an overflow, doing as much soft-wrapping as possible.
... the max-content size is the opposite — in the case of text, this would have the text display as wide as possible, doing no soft-wrapping, even if an overflow was caused.
... the keyword value max-content exposes this behavior.

Python - MDN Web Docs Glossary: Definitions of Web-related terms
python is a high level general-purpose programming language.
... it was created by guido van rossum as a successor to another language (called abc) between 1985 and 1990, and is currently used on a large array of domains like web development, desktop applications, data science, devops, and automation/productivity.
... python is developed under an osi-approved open source license, making it freely usable and distributable, even for commercial use.

Request header - MDN Web Docs Glossary: Definitions of Web-related terms
for example, the content-length appearing in a post request is actually an entity header referring to the size of the body of the request message.
... a few request headers after a get request: get /home.html http/1.1 host: developer.mozilla.org user-agent: mozilla/5.0 (macintosh; intel mac os x 10.9; rv:50.0) gecko/20100101 firefox/50.0 accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 accept-language: en-us,en;q=0.5 accept-encoding: gzip, deflate, br referer: https://developer.mozilla.org/testpage.html connection: keep-alive upgrade-insecure-requests: 1 if-modified-since: mon, 18 jul 2016 02:36:04 gmt if-none-match: "c561c68d0ba92bbeb8b0fff2a...
...9199f722e3a621a" cache-control: max-age=0 strictly speaking, the content-length header in this example is not a request header like the others, but an entity header: post /myform.html http/1.1 host: developer.mozilla.org user-agent: mozilla/5.0 (macintosh; intel mac os x 10.9; rv:50.0) gecko/20100101 firefox/50.0 content-length: 128 learn more technical knowledge list of all http headers ...

Screen reader - MDN Web Docs Glossary: Definitions of Web-related terms
there are some browser extension screen readers, but most screen readers operate system-wide for all user applications, not just the browser.
... in terms of web accessibility, most user agents provide an accessibility object model and screen readers interact with dedicated accessibility apis, using various operating system features and employing hooking techniques.
... voiceover macos comes with voiceover, a built-in screen reader.

Semantics - MDN Web Docs Glossary: Definitions of Web-related terms
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 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).
... some of the benefits from writing semantic markup are as follows: search engines will consider its contents as important keywords to influence the page's search rankings (see seo) screen readers can use it as a signpost to help visually impaired users navigate a page finding blocks of meaningful code is significantly easier than searching though endless divs with or without semantic or namespaced classes suggests to the developer the type of data that will be populated semantic naming mirrors proper custom element/component naming when approaching which markup to use, ask yourself, "what element(s) best de...

Signature (functions) - MDN Web Docs Glossary: Definitions of Web-related terms
in depth signatures in javascript javascript is a loosely typed or a dynamic language.
... the method is installed on the prototype of myobject (thus it is an instance method) as opposed to being a static method.
... the static keyword indicates that this method is a class method as opposed to being an instance method.

Site - MDN Web Docs Glossary: Definitions of Web-related terms
the site of a piece of web content is determined by the registrable domain of the host within the origin.
... this is computed by consulting a public suffix list to find the portion of the host which is counted as the public suffix (e.g.
... the concept of a site is used in samesite cookies, as well as a web application's cross-origin resource policy.

TCP handshake - MDN Web Docs Glossary: Definitions of Web-related terms
tcp (transmission control protocol) is a transport layer host-to-host protocol for connection-oriented communication between two computers on an ip network.
... the host, generally the browser, sends a tcp synchronize packet to the server.
...the host receives the server's syn-ack and sends an acknowledge.

TLD - MDN Web Docs Glossary: Definitions of Web-related terms
a tld (top-level domain) is the most generic domain in the internet's hierarchical dns (domain name system).
...depending on how strict an administrating organization might be, tld often serves as a clue to the purpose, ownership, or nationality of a website.
... sponsored top-level domains (stld) these domains are proposed and sponsored by private organizations that decide whether an applicant is eligible to use the tld, based on community theme concepts.

UDP (User Datagram Protocol) - MDN Web Docs Glossary: Definitions of Web-related terms
it has no handshaking dialogues, and thus exposes the user's program to any unreliability of the underlying network; there is no guarantee of delivery, ordering, or duplicate protection.
... if error-correction facilities are needed at the network interface level, an application may use the transmission control protocol (tcp) or stream control transmission protocol (sctp) which are designed for this purpose.
... udp is suitable for purposes where error checking and correction are either not necessary or are performed in the application; udp avoids the overhead of such processing in the protocol stack.

Vendor Prefix - MDN Web Docs Glossary: Definitions of Web-related terms
css prefixes the major browsers use the following prefixes: -webkit- (chrome, safari, newer versions of opera, almost all ios browsers including firefox for ios; basically, any webkit based browser) -moz- (firefox) -o- (old pre-webkit versions of opera) -ms- (internet explorer and microsoft edge) sample usage: -webkit-transition: all 4s ease; -moz-transition: all 4s ease; -ms-transition: all 4s ease; -o-transition: all 4s ease; transition: all 4s ease; api prefixes historically, vendors have also used ...
... interface prefixes prefixes for interface names are upper-cased: webkit (chrome, safari, newer versions of opera, almost all ios browsers (including firefox for ios); basically, any webkit based browser) moz (firefox) o (older, pre-webkit, versions of opera) ms (internet explorer and microsoft edge) property and method prefixes the prefixes for properties and methods are lower-case: webkit (chrome, safari, newer versions of opera, almost all ios browsers (including firefox for ios); basically, any webkit ...
...based browser) moz (firefox) o (old, pre-webkit, versions of opera) ms (internet explorer and microsoft edge) sample usage: var requestanimationframe = window.requestanimationframe || window.mozrequestanimationframe || window.webkitrequestanimationframe || window.orequestanimationframe || window.msrequestanimationframe; learn more general knowledge vendor prefix on wikipedia ...

JPEG - MDN Web Docs Glossary: Definitions of Web-related terms
jpeg (joint photographic experts group) is a commonly used method of lossy compression for digital images.
... jpeg compression is composed of three compression techniques applied in successive layers, including chrominance subsampling, discrete cosine transformation and quantization, and run-length delta & huffman encoding.
...a discrete cosine transform expresses a finite sequence of data points in terms of a sum of cosine functions oscillating at different frequencies.

Origin - MDN Web Docs Glossary: Definitions of Web-related terms
web content's origin is defined by the scheme (protocol), host (domain), and port of the url used to access it.
... two objects have the same origin only when the scheme, host, and port all match.
... examples of same origin http://example.com/app1/index.html http://example.com/app2/index.html same origin because same scheme (http) and host (example.com) http://example.com:80 http://example.com same origin because a server delivers http content through port 80 by default examples of different origin http://example.com/app1 https://example.com/app2 different schemes http://example.com http://www.example.com http://myapp.example.com different hosts http://example.com http://example.com:8080 different ports specifications specification status comment html li...

How do you host your website on Google App Engine? - Learn web development
google app engine is a powerful platform that lets you build and run applications on google’s infrastructure — whether you need to build a multi-tiered web application from scratch or host a static website.
... here's a step-by-step guide to hosting your website on google app engine.
...upload your app to app engine: gcloud app deploy enter a number to choose the region where you want your application located.

OS TARGET
os_target is typically the output of the 'uname -s' command on the target platform.
... the following list is not complete as any platform could have its own os_target.
... winnt linux darwin android sunos freebsd openbsd netbsd os2 beos irix64 aix hp-ux dragonfly skyos riscos nto osf1 ...

mozbrowserclose
the mozbrowserclose event is fired when the content of a browser <iframe> calls the window.close() method.
... general info specification non standard interface customevent bubbles yes cancelable yes target <iframe> default action none properties property type description target read only eventtarget the event target (the topmost target in the dom tree).
... example var browser = document.queryselector("iframe"); browser.addeventlistener("mozbrowserclose", function() { console.log("browser window has been closed; iframe will be destroyed."); }); related events mozbrowserasyncscroll mozbrowsercontextmenu mozbrowsererror mozbrowsericonchange mozbrowserloadend mozbrowserloadstart mozbrowserlocationchange mozbrowseropenwindow mozbrowsersecuritychange mozbrowsershowmodalprompt mozbrowsertitlechange mozbrowserusernameandpasswordrequired ...

PR_CloseFileMap
closes a file mapping.
... syntax #include <prio.h> prstatus pr_closefilemap(prfilemap *fmap); parameter the function has the following parameter: fmap the file mapping to be closed.
... description when a file mapping created with a call to pr_createfilemap is no longer needed, it should be closed with a call to pr_closefilemap.

PR_IntervalToMicroseconds
converts platform-dependent intervals to standard clock microseconds.
... syntax #include <prinrval.h> pruint32 pr_intervaltomicroseconds(printervaltime ticks); parameter ticks the number of platform-dependent intervals to convert.
... returns equivalent in microseconds of the value passed in the ticks parameter.

JS_GetPositiveInfinityValue
syntax // added in spidermonkey 42 js::value js_getpositiveinfinityvalue(jscontext *cx); js::value js_getnegativeinfinityvalue(jscontext *cx); // obsolete since spidermonkey 42 jsval js_getpositiveinfinityvalue(jscontext *cx); jsval js_getnegativeinfinityvalue(jscontext *cx); name type description cx jscontext * a context.
... description js_getpositiveinfinityvalue returns a js::value that represents an ieee floating-point positive infinity.
... see also mxr id search for js_getpositiveinfinityvalue mxr id search for js_getnegativeinfinityvalue js_getnanvalue bug 1184564 -- changed jsval to js::value ...

JS_VersionToString
syntax const char * js_versiontostring(jsversion version); name type description version jsversion version value to convert.
... description js_versiontostring attempts to convert the version to a const char * string representation.
... js_versiontostring may return any of the following values: enumeration string jsversion_1_0 "1.0" obsolete since jsapi 24 jsversion_1_1 "1.1" obsolete since jsapi 24 jsversion_1_2 "1.2" obsolete since jsapi 24 jsversion_1_3 "1.3" obsolete since jsapi 24 jsversion_1_4 "1.4" obsolete since jsapi 24 jsversion_ecma_3 "ecmav3" jsversion_1_5 "1.5" obsolete since jsapi 24 jsversion_1_6 "1.6" jsversion_1_7 "1.7" jsversion_1_8 "1.8" jsversion_ecma_5 "ecmav5" jsversion_default "default" other null see also mxr id search for js_stringtoversion jsversion js_getversion js_setversionforcompartment js_stringtoversion bug 824312 ...

NS LossyConvertUTF16toASCII external
methods constructors void ns_lossyconvertutf16toascii_external(const nsastring&) - source parameters nsastring& astr void ns_lossyconvertutf16toascii_external(const prunichar*, pruint32) - source parameters prunichar* adata pruint32 alength get char* get() const - source operator= nscstring_external& operator=(con...
... parameters char** begin char** end char* beginreading() const - source endreading char* endreading() const - source charat char charat(pruint32) const - source parameters pruint32 apos operator[] char operator[](pruint32) const - source parameters pruint32 apos first char first() const - source beginwriting pruint32 beginwriting(char**, char**, pruint32) - source get the length, begin writing, and optionally set the length of a string all in one operation.
...or+=(char) - source parameters char c nsacstring& operator+=(const char*) - source parameters char* data nsacstring& operator+=(const nsacstring&) - source parameters nsacstring& readable insert void insert(char, pruint32) - source parameters char c pruint32 pos void insert(const char*, pruint32, pruint32) - source parameters char* data pruint32 pos pruint32 length void insert(const nsacstring&, pruint32) - source parameters nsacstring& readable pruint32 pos cut void cut(pruint32, pruint32) - source parameters pruint32 cutst...

nsIDOMGeoPosition
dom/interfaces/geolocation/nsidomgeoposition.idlscriptable this interface describes a geographical location at a specific time.
... 1.0 66 introduced gecko 1.9.1 inherits from: nsisupports last changed in gecko 1.9.2 (firefox 3.6 / thunderbird 3.1 / fennec 1.0) attributes attribute type description address nsidomgeopositionaddress the address of the user's current location, if available.
... coords nsidomgeopositioncoords the user's current position information.

nsIDOMGeoPositionCoords
the nsidomgeopositioncoords interface describes a geographical location.
... dom/interfaces/geolocation/nsidomgeopositioncoords.idlscriptable please add a summary to this article.
... accuracy double the accuracy of position information, in meters.

nsIDOMGeoPositionError
the nsidomgeopositionerror interface represents an error that occurred while performing geolocation operations.
... dom/interfaces/geolocation/nsidomgeopositionerror.idlscriptable please add a summary to this article.
... position_unavailable 2 unable to access location data.

AudioScheduledSourceNode: ended event - Web APIs
the ended event of the audioscheduledsourcenode interface is fired when the source node has stopped playing.
... bubbles no cancelable no interface event event handler property audioscheduledsourcenode.onended usage notes this event occurs when a audioscheduledsourcenode has stopped playing, either because it's reached a predetermined stop time, the full duration of the audio has been performed, or because the entire buffer has been played.
... 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
the onended event handler for the audioscheduledsourcenode interface specifies an eventhandler to be executed when the ended event occurs on the node.
... this event is sent to the node when the concrete interface (such as audiobuffersourcenode, oscillatornode, or constantsourcenode) determines that it has stopped playing.
... syntax audioscheduledsourcenode.onended = eventhandler; value a function which is called by the browser when the ended event occurs on the audioscheduledsourcenode.

CSSNumericValue.toSum() - Web APIs
the tosum() method of the cssnumericvalue interface converts the object's value to a cssmathsum object to values of the specified unit.
... syntax var cssmathsum = cssnumericvalue.tosum(units); parameters units the units to convert to.
... examples let v = css.px("23").add(css.percent("4")).add(css.cm("3")).add(css.in("9")); v.tostring() // => "calc(23px + 4% + 3cm + 9in)" v.tosum("px", "percent").tostring() // => "calc(1000.39px + 4%)" specifications specification status comment css typed om level 1the definition of 'tosum' in that specification.

DedicatedWorkerGlobalScope.close() - Web APIs
the close() method of the dedicatedworkerglobalscope interface discards any tasks queued in the dedicatedworkerglobalscope's event loop, effectively closing this particular scope.
... syntax self.close(); example if you want to close your worker instance from inside the worker itself, you can call the following: close(); close() and self.close() are effectively equivalent — both represent close() being called from inside the worker's inner scope.
... specifications specification status comment html living standardthe definition of 'close()' in that specification.

Document.close() - Web APIs
the document.close() method finishes writing to a document, opened with document.open().
... syntax document.close(); example // open a document to write to it document.open(); // write the content of the document document.write("<p>the one and only content.</p>"); // close the document document.close(); specifications specification status comment html living standardthe definition of 'document.close()' in that specification.
... living standard document object model (dom) level 2 html specificationthe definition of 'document.close()' in that specification.

Element: compositionend event - Web APIs
the compositionend event is fired when a text composition system such as an input method editor completes or cancels the current composition session.
... 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: ${event.data}`); }); live example html <div class="control"> <label for="name">on macos, click in the textbox below,<br> then type <kbd>option</kbd> + <kbd>`</kbd>, then <kbd>a</kbd>:</label> <input type="text" id="example" name="example"> </div> <div class="event-log"> <label>event log:</label> <textarea readonly class="event-log-contents" rows="8" cols="2...
... const inputelement = document.queryselector('input[type="text"]'); const log = document.queryselector('.event-log-contents'); const clearlog = document.queryselector('.clear-log'); clearlog.addeventlistener('click', () => { log.textcontent = ''; }); function handleevent(event) { log.textcontent = log.textcontent + `${event.type}: ${event.data}\n`; } inputelement.addeventlistener('compositionstart', handleevent); inputelement.addeventlistener('compositionupdate', handleevent); inputelement.addeventlistener('compositionend', handleevent); result specifications specification status ui events working draft ...

Element: compositionstart event - Web APIs
the compositionstart event is fired when a text composition system such as an input method editor starts a new composition session.
... 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: ${event.data}`); }); live example html <div class="control"> <label for="name">on macos, click in the textbox below,<br> then type <kbd>option</kbd> + <kbd>`</kbd>, then <kbd>a</kbd>:</label> <input type="text" id="example" name="example"> </div> <div class="event-log"> <label>event log:</label> <textarea readonly class="event-log-contents" rows="8" cols="2...
... const inputelement = document.queryselector('input[type="text"]'); const log = document.queryselector('.event-log-contents'); const clearlog = document.queryselector('.clear-log'); clearlog.addeventlistener('click', () => { log.textcontent = ''; }); function handleevent(event) { log.textcontent = log.textcontent + `${event.type}: ${event.data}\n`; } inputelement.addeventlistener('compositionstart', handleevent); inputelement.addeventlistener('compositionupdate', handleevent); inputelement.addeventlistener('compositionend', handleevent); result specifications specification status ui events working draft ...

Element: compositionupdate event - Web APIs
the compositionupdate event is fired when a new character is received in the context of a text composition session controlled by a text composition system such as an input method editor.
... 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: ${event.data}`); }); live example html <div class="control"> <label for="name">on macos, click in the textbox below,<br> then type <kbd>option</kbd> + <kbd>`</kbd>, then <kbd>a</kbd>:</label> <input type="text" id="example" name="example"> </div> <div class="event-log"> <label>event log:</label> <textarea readonly class="event-log-contents" rows="8" cols="25"></tex...
... const inputelement = document.queryselector('input[type="text"]'); const log = document.queryselector('.event-log-contents'); const clearlog = document.queryselector('.clear-log'); clearlog.addeventlistener('click', () => { log.textcontent = ''; }); function handleevent(event) { log.textcontent = log.textcontent + `${event.type}: ${event.data}\n`; } inputelement.addeventlistener('compositionstart', handleevent); inputelement.addeventlistener('compositionupdate', handleevent); inputelement.addeventlistener('compositionend', handleevent); result specifications specification status ui events working draft ...

GeolocationPosition.coords - Web APIs
the geolocationposition.coords read-only property returns a geolocationcoordinates object representing a geographic position.
... syntax let coord = geolocationpositioninstance.coords value a geolocationcoordinates object instance.
... specifications specification status comment geolocation apithe definition of 'geolocationposition.coords' in that specification.

GeolocationPosition.timestamp - Web APIs
the geolocationposition.timestamp read-only property returns a domtimestamp object, represents the date and the time of the creation of the geolocationposition object it belongs to.
... syntax var timestamp = geolocationpositioninstance.timestamp value a domtimestamp object instance.
... specifications specification status comment geolocation apithe definition of 'geolocationposition.timestamp' in that specification.

GeolocationPositionError.message - Web APIs
the geolocationpositionerror.message read-only property returns a human-readable domstring describing the details of the error.
... syntax let msg = geolocationpositionerrorinstance.message value a human-readable domstring describing the details of the error.
... specifications specification status comment geolocation apithe definition of 'geolocationpositionerror.message' in that specification.

GlobalEventHandlers.onlostpointercapture - Web APIs
the onlostpointercapture property of the globaleventhandlers mixin is an eventhandler that processes lostpointercapture events.
... syntax target.onlostpointercapture = functionref; value functionref is a function name or a function expression.
... 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.

HTMLCanvasElement: webglcontextlost event - Web APIs
the webglcontextlost event of the webgl api is fired if the user agent detects that the drawing buffer associated with a webglrenderingcontext object has been lost.
... 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.
... specifications specification status comment webgl 1.0the definition of 'webglcontextlost' in that specification.

HTMLDialogElement: close event - Web APIs
the close event is fired on an htmldialogelement object when the dialog it represents has been closed.
... bubbles no cancelable no interface event event handler property onclose examples live example html <dialog class="example-dialog"> <button class="close" type="reset">close</button> </dialog> <button class="open-dialog">open dialog</button> <div class="result"></div> css button, div { margin: .5rem; } js const result = document.queryselector('.result'); const dialog = document.queryselector('.example-dialog'); dialog.addeventlistener('close', (event) => { result.textcontent = 'dialog was closed'; }); const opendialog = document.queryselector('.open-dialog'); opendialog.addeventlistener('click', () => { if (typeof dialog.showmodal === 'function') { dialog.showmodal(); result.textcontent = ''; } e...
...lse { result.textcontent = 'the dialog api is not supported by this browser'; } }); const closebutton = document.queryselector('.close'); closebutton.addeventlistener('click', () => { dialog.close(); }); result specifications specification status html living standardthe definition of 'close' in that specification.

HTMLMediaElement.crossOrigin - Web APIs
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.

ImageBitmap.close() - Web APIs
the imagebitmap.close() method disposes of all graphical resources associated with an imagebitmap.
... syntax void imagebitmap.close() examples var offscreen = new offscreencanvas(256, 256); var gl = offscreen.getcontext('webgl'); // ...
... var bitmap = offscreen.transfertoimagebitmap(); // imagebitmap { width: 256, height: 256 } bitmap.close(); // imagebitmap { width: 0, height: 0 } -- disposed specifications specification status comment html living standardthe definition of 'close()' in that specification.

KeyframeEffect.composite - Web APIs
the composite property of a keyframeeffect resolves how an element's animation impacts its underlying property values.
... syntax // getting var compositeenumeration = keyframeeffect.composite; // setting keyframeeffect.composite = 'accumulate'; value to understand these values, take the example of a keyframeeffect value of blur(2) working on an underlying property value of blur(3).
... specifications specification status comment web animationsthe definition of 'keyframeeffect.composite' in that specification.

KeyframeEffect.iterationComposite - Web APIs
the iterationcomposite property of a keyframeeffect resolves how the animation's property value changes accumulate or override each other upon each of the animation's iterations.
... syntax // getting var iterationcompositeenumeration = keyframeeffect.iterationcomposite; // setting keyframeeffect.iterationcomposite = 'replace'; values replace the keyframeeffect value produced is independent of the current iteration.
... specifications specification status comment web animations level 2the definition of 'iterationcomposite' in that specification.

close() - Web APIs
the mediakeysession.close() method notifies that the current media session is no longer needed, and that the content decryption module should release any resources associated with this object and close it.
... syntax mediakeysession.close().then(function() { ...
... specifications specification status comment encrypted media extensionsthe definition of 'close()' in that specification.

MediaStreamAudioSourceOptions.mediaStream - Web APIs
the mediastreamaudiosourceoptions dictionary's mediastream property must specify the mediastream from which to retrieve audio data when instantiating a mediastreamaudiosourcenode using the mediastreamaudiosourcenode() constructor.
... syntax mediastreamaudiosourceoptions = { mediastream: audiosourcestream; } mediastreamaudiosourceoptions.mediastream = audiosourcestream; value a mediastream representing the stream from which to use a mediastreamtrack as the source of audio for the node.
... example specifications specification status comment web audio apithe definition of 'mediastreamaudiosourceoptions.mediastream' in that specification.

MessagePort.close() - Web APIs
the close() method of the messageport interface disconnects the port, so it is no longer active.
... syntax port.close() returns void.
... channel.port1.addeventlistener('message', handlemessage, false); function handlemessage(e) { para.innerhtml = e.data; textinput.value = ''; } channel.port1.start(); you could stop messages being sent at any time using channel.port1.close(); specifications specification status comment html living standardthe definition of 'close()' in that specification.

Microsoft API extensions - Web APIs
microsoft browsers (internet explorer, and in a few cases, microsoft edge) support a number of special microsoft extensions to the otherwise standard dom apis.
... note: these apis will only work in microsoft applications, and are not on a standards track.
...() htmlvideoelement.msislayoutoptimalforplayback htmlvideoelement.msisstereo3d htmlvideoelement.mszoom htmlaudioelement.msaudiocategory htmlaudioelement.msaudiodevicetype htmlmediaelement.mscleareffects() htmlmediaelement.msinsertaudioeffect() mediaerror.msextendedcode msgraphicstrust msgraphicstruststatus msisboxed msplaytodisabled msplaytopreferredsourceuri msplaytoprimary msplaytosource msrealtime mssetmediaprotectionmanager mssetvideorectangle 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 mscach...

Notification.onclose - Web APIs
the onclose property of the notification interface specifies an event listener to receive close events.
... these events occur when a notification is closed.
... syntax notification.onclose = function() { ...

PositionOptions.enableHighAccuracy - Web APIs
the positionoptions.enablehighaccuracy property is a boolean that indicates the application would like to receive the best possible results.
... if true and if the device is able to provide a more accurate position, it will do so.
... syntax positionoptions.enablehighaccuracy = booleanvalue specifications specification status comment geolocation apithe definition of 'positionoptions.enablehighaccuracy' in that specification.

PositionOptions.timeout - Web APIs
the positionoptions.timeout property is a positive long value representing the maximum length of time (in milliseconds) the device is allowed to take in order to return a position.
... the default value is infinity, meaning that getcurrentposition() won't return until the position is available.
... syntax positionoptions.timeout = timelength specifications specification status comment geolocation apithe definition of 'positionoptions.timeout' in that specification.

ReadableStreamBYOBReader.closed - Web APIs
the closed read-only property of the readablestreambyobreader interface returns a promise that fulfills if the stream becomes closed or the reader's lock is released, or rejects if the stream errors.
... syntax var closed = readablestreambyobreader.closed; value a promise.
... specifications specification status comment streamsthe definition of 'closed' in that specification.

SecurityPolicyViolationEvent.disposition - Web APIs
the disposition read-only property of the securitypolicyviolationevent interface indicates how the violated policy is configured to be treated by the user agent.
... syntax let disposition = violationeventinstance.disposition; value a value defined in the securitypolicyviolationeventdisposition enum representing the uri of the blocked resource.
... possible values are "enforce" or "report" example document.addeventlistener("securitypolicyviolation", (e) => { console.log(e.disposition); }); specifications specification status comment content security policy level 3the definition of 'disposition' in that specification.

Selection.collapseToStart() - Web APIs
the selection.collapsetostart() method collapses the selection to the start of the first range in the selection.
... syntax sel.collapsetostart() parameters none.
... specifications specification status comment selection apithe definition of 'selection.collapsetostart()' in that specification.

ShadowRoot.host - Web APIs
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.
... // return the original host element some time later let hostelem = shadow.host; specifications specification status comment domthe definition of 'shadowroot.host' in that specification.

SharedWorkerGlobalScope.close() - Web APIs
the close() method of the sharedworkerglobalscope interface discards any tasks queued in the sharedworkerglobalscope's event loop, effectively closing this particular scope.
... syntax self.close(); example if you want to close your worker instance from inside the worker itself, you can call the following: close(); close() and self.close() are effectively equivalent — both represent close() being called from inside the worker's inner scope.
... specifications specification status comment html living standardthe definition of 'close()' in that specification.

URL.host - Web APIs
the host property of the url interface is a usvstring containing the host, that is the hostname, and then, if the port of the url is nonempty, a ':', followed by the port of the url.
... syntax const host = url.host url.host = newhost value a usvstring.
... examples let url = new url('/docs/web/api/url/host'); console.log(url.host); // "developer.mozilla.org" url = new url('https://developer.mozilla.org:443/docs/web/api/url/host'); console.log(url.host); // "developer.mozilla.org" // the port number is not included because 443 is the scheme's default port url = new url('https://developer.mozilla.org:4097/docs/web/api/url/host'); console.log(url.host); // "developer.mozilla.org:4097" specifications specification status comment urlthe definition of 'url.host' in that specification.

URL.hostname - Web APIs
the hostname property of the url interface is a usvstring containing the domain name of the url.
... syntax const domain = url.hostname url.hostname = domain value a usvstring.
... examples const url = new url('/docs/web/api/url/hostname'); console.log(url.hostname); // logs: 'developer.mozilla.org' specifications specification status comment urlthe definition of 'url.hostname' in that specification.

URL.toString() - Web APIs
the url.tostring() stringifier method returns a usvstring containing the whole url.
... syntax const href = url.tostring() return value a usvstring.
... examples const url = new url("/docs/web/api/url/tostring"); url.tostring(); // should return the url as a string specifications specification status comment urlthe definition of 'stringifier' in that specification.

URLSearchParams.toString() - Web APIs
the tostring() method of the urlsearchparams interface returns a query string suitable for use in a url.
... syntax urlsearchparams.tostring() parameters none.
...params.append('foo', 4); console.log(params.tostring()); //prints 'foo=1&bar=2&foo=4' // note: params can also be directly created let url = new url('https://example.com?foo=1&bar=2'); let params = url.searchparams; // or even simpler let params = new urlsearchparams('foo=1&bar=2'); specifications specification status comment urlthe definition of 'tostring() (see "stringifier")' in that specification.

USBDevice.close() - Web APIs
the close() method of the usbdevice interface returns a promise that resolves when all open interfaces are released and the device session has ended.
... syntax var promise = usbdevice.close() parameters none.
... specifications specification status comment webusbthe definition of 'close()' in that specification.

WEBGL_lose_context.restoreContext() - Web APIs
the webgl_lose_context.restorecontext() method is part of the webgl api and allows you to simulate restoring the context of a webglrenderingcontext object.
... syntax gl.getextension('webgl_lose_context').restorecontext(); errors thrown invalid_operation if the context was not lost.
... 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.

Taking still photos with WebRTC - Web APIs
(function() { var width = 320; // we will scale the photo width to this var height = 0; // this will be computed based on the input stream var streaming = false; var video = null; var canvas = null; var photo = null; var startbutton = null; those variables are: width whatever size the incoming video is, we're going to scale the resulting image to be 320 pixels wide.
... clearing the photo box clearing the photo box involves creating an image, then converting it into a format usable by the <img> element that displays the most recently captured frame.
... capturing a frame from the stream there's one last function to define, and it's the point to the entire exercise: the takepicture() function, whose job it is to capture the currently displayed video frame, convert it into a png file, and display it in the captured frame box.

WindowOrWorkerGlobalScope.crossOriginIsolated - Web APIs
the crossoriginisolated read-only property of the windoworworkerglobalscope interface returns a boolean value that indicates whether a sharedarraybuffer can be sent via a window.postmessage() call.
... this value is dependant on any cross-origin-opener-policy and cross-origin-embedder-policy headers present in the response.
... syntax var mycrossoriginisolated = self.crossoriginisolated; // or just crossoriginisolated value a boolean value examples if(crossoriginisolated) { // post sharedarraybuffer } else { // do something else } specifications specification status comment html living standardthe definition of 'crossoriginisolated' in that specification.

WorkerGlobalScope.onclose - Web APIs
summary the onclose property of the workerglobalscope interface represents an eventhandler to be called when the close event occurs and bubbles through the worker.
... syntax self.onclose = function() { ...
... }; example the following code snippet shows an onclose handler set inside a worker: self.onclose = function() { console.log('your worker instance has been closed'); } specifications this feature is no longer defined in any specifications.

XRRigidTransform.position - Web APIs
the read-only xrrigidtransform property position is a dompointreadonly object which provides the 3d point, specified in meters, describing the translation component of the transform.
... syntax let pos = xrrigidtransform.position; value a read-only dompointreadonly indicating the 3d position component of the transform matrix.
... specifications specification status comment webxr device apithe definition of 'xrrigidtransform.position' in that specification.

-webkit-mask-position-x - CSS: Cascading Style Sheets
the -webkit-mask-position-x css property sets the initial horizontal position of a mask image.
... /* keyword values */ -webkit-mask-position-x: left; -webkit-mask-position-x: center; -webkit-mask-position-x: right; /* <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 lef...
... 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; } .exampletwo { -webkit-mask-image: url(mask.png); -webkit-mask-position-x: 25%; } specifications not part of any standard.

-webkit-mask-position-y - CSS: Cascading Style Sheets
the -webkit-mask-position-y css property sets the initial vertical position of a mask image.
... /* keyword values */ -webkit-mask-position-y: top; -webkit-mask-position-y: center; -webkit-mask-position-y: bottom; /* <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 ...
... 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; } .exampletwo { -webkit-mask-image: url(mask.png); -webkit-mask-position-y: 25%; } specifications not part of any standard.

CSS Positioned Layout - CSS: Cascading Style Sheets
css positioned layout is a module of css that defines how to position elements on the page.
... reference css properties bottom clear float left position right top z-index guides understanding css z-index presents the notion of stacking context and explains how z-ordering works, with several examples.
... specifications specification status comment css positioned layout module level 3 working draft css level 2 (revision 1) recommendation ...

Microsoft CSS extensions - CSS: Cascading Style Sheets
microsoft applications such as edge and internet explorer support a number of special microsoft extensions to css.
... microsoft-only properties (avoid using on websites) note: these properties will only work in microsoft applications, and are not on a standards track.
... -ms-scrollbar-face-color -ms-scrollbar-highlight-color -ms-scrollbar-shadow-color -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 m...

Demos of open web technologies
2d graphics canvas blob sallad: an interactive blob using javascript and canvas (code demos) 3d raycaster processing.js p5js 3d on 2d canvas minipaint: image editor (source code) zen photon garden (source code) multi touch in canvas demo (source code) svg bubblemenu (visual effects and interaction) html transformations using foreignobject (visual effects and transforms) phonetics guide (interactive) 3d objects demo (interactive) blobular (interactive) video embedded in ...
...ocal download) summer html image map creator (source code) video video 3d animation "mozilla constantly evolving" video 3d animation "floating dance" streaming anime, movie trailer and interview billy's browser firefox flick virtual barber shop transformers movie trailer a scanner darkly movie trailer (with built in controls) events firing and volume control dragable and sizable videos 3d graphics webgl web audio fireworks ioquake3 (source code) escher puzzle (source code) kai 'opua (source code) virtual reality the polar sea (source code) sechelt fly-through (source code) css css zen garden css floating logo "mozilla" paperfold css blockout rubik's cube pure css slides planetarium (source code) loader with blend modes text reveal with clip-path amb...
...ient shadow with custom properties luminiscent vial css-based single page application (source code) transformations impress.js (source code) games ioquake3 (source code) kai 'opua (source code) web apis notifications api html5 notifications (source code) web audio api web audio fireworks oscope.js - javascript oscilloscope html5 web audio showcase (source code) html5 audio visualizer (source code) graphical filter editor and visualizer (source code) file api slide my text - presentation from plain text files web workers web worker fractals photo editor coral generator raytracer hotcold touch typing ...

Feature-Policy: gyroscope - HTTP
the http feature-policy header gyroscope directive controls whether the current document is allowed to gather information about the orientation of the device through the gyroscope interface.
... syntax feature-policy: gyroscope <allowlist>; <allowlist> an allowlist is a list of origins that takes one or more of the following values, separated by spaces: *: the feature will be allowed in this document, and all nested browsing contexts (iframes) regardless of their origin.
...the feature is not allowed in cross-origin documents in nested browsing contexts.

Boolean.prototype.toSource() - JavaScript
the tosource() method returns a string representing the source code of the object.
... syntax booleanobj.tosource() boolean.tosource() return value a string representing the source code of the object.
... examples native function for the built-in boolean object, tosource returns the following string indicating that the source code is not available: function boolean() { [native code] } specifications not part of any standard.

Date.prototype.toSource() - JavaScript
the tosource() method returns a string representing the source code of the object.
... syntax dateobj.tosource() date.tosource() return value a string representing the source code of the given date object.
... examples native function for the built-in date object, tosource() returns the following string indicating that the source code is not available: function date() { [native code] } specifications not part of any standard.

Map.prototype[@@toStringTag] - JavaScript
the map[@@tostringtag] property has an initial value of "map".
... the source for this interactive example is stored in a github repository.
... property attributes of map.prototype[@@tostringtag] writable no enumerable no configurable yes syntax map[symbol.tostringtag] examples using tostringtag object.prototype.tostring.call(new map()) // "[object map]" specifications specification ecmascript (ecma-262)the definition of 'map.prototype[@@tostringtag]' in that specification.

Number.prototype.toSource() - JavaScript
the tosource() method returns a string representing the source code of the object.
... syntax numobj.tosource() number.tosource() return value a string representing the source code of the object.
... examples native function for the built-in number object, tosource() returns the following string indicating that the source code is not available: function number() { [native code] } for instances of number, tosource() returns a string representing the source code.

RegExp.prototype.toSource() - JavaScript
the tosource() method returns a string representing the source code of the object.
... syntax regexobj.tosource() return value a string representing the source code of the given regexp object.
... examples native function for the built-in regexp object, tosource() returns the following string indicating that the source code is not available: function regexp() { [native code] } for instances of regexp, tosource() returns a string representing the source code.

String.prototype.toSource() - JavaScript
the tosource() method returns a string representing the source code of the object.
... syntax string.tosource() str.tosource() return value a string representing the source code of the calling object.
... examples native function for the built-in string object, tosource() returns the following string indicating that the source code is not available: function string() { [native code] } for instances of string or string literals, tosource() returns a string representing the source code.

Symbol.prototype.toSource() - JavaScript
the tosource() method returns a string representing the source code of the object.
... syntax symbol.tosource() var sym = symbol() sym.tosource() return value a string representing the source code of the object.
... examples native function for the built-in symbol object, tosource returns the following string indicating that the source code is not available: "function symbol() { [native code] }" for instances of symbol, tosource returns a string representing the source code.

overline-position - SVG: Scalable Vector Graphics
the overline-position attribute represents the ideal vertical position of the overline.
... the overline position is expressed in the font's coordinate system.
... 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> ...

strikethrough-position - SVG: Scalable Vector Graphics
« svg attribute reference home the strikethrough-position attribute represents the ideal vertical position of the strikethrough.
... the strikethrough position is expressed in the font's coordinate system.
... 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> ...