Movement, orientation, and motion: A WebXR example - Web APIs
in this article, we'll make use of information introduced in the previous articles in our webxr tutorial series to construct an example which animates a rotating cube around which the user can move freely using a vr headset, keyboard, and/or mouse.
... this will help to solidify your understanding of how the geometry of 3d graphics and vr work, as well as to help ensure you understand the way the functions and data that are used during xr rendering work together.
... screenshot of this example in action the core of this example—the spinning, textured, lighted cube—is taken from our webgl tutorial series; namely, the penultimate article in the series, covering lighting in webgl.
...And 97 more matches

The Implementation of the Application Object Model - Archive of obsolete content
the first section of the document describes the motivation and reasoning behind using rdf as the foundation of xul.
... this section makes a technical argument both for having xul in the first place and for using rdf as the underlying implementation of xul's content model.
... the second section describes the xul/rdf architecture itself and outlines enhancements to the xul language in order to allow the markup language to reference local data and to indicate how and when it would like to be annotatable with local data.
...And 92 more matches

<audio>: The Embed Audio element - HTML: Hypertext Markup Language
the html <audio> element is used to embed sound content in documents.
... it may contain one or more audio sources, represented using the src attribute or the <source> element: the browser will choose the most suitable one.
... it can also be the destination for streamed media, using a mediastream.
...And 80 more matches

Making decisions in your code — conditionals - Learn web development
overview: building blocks next in any programming language, the code needs to make decisions and carry out actions accordingly depending on different inputs.
...in this article, we'll explore how so-called conditional statements work in javascript.
... objective: to understand how to use conditional structures in javascript.
...And 78 more matches

Establishing a connection: The WebRTC perfect negotiation pattern - Web APIs
because webrtc doesn't mandate a specific transport mechanism for signaling during the negotiation of a new peer connection, it's highly flexible.
... however, despite that flexibility in transport and communication of signaling messages, there's still a recommended design pattern you should follow when possible, known as perfect negotiation.
... this article introduces webrtc perfect negotiation, describing how it works and why it's the recommended way to negotiate a webrtc connection between peers, and provides sample code to demonstrate the technique.
...And 77 more matches

Extension Versioning, Update and Compatibility - Archive of obsolete content
add-on versioning add-ons should specify their versions using the toolkit version format.
... as a rough overview this is a version string split by periods, some examples: 2.0 1.0b1 3.0pre1 5.0.1.2 note: before firefox 1.5 the more basic firefox version format was used: major.minor.release.build[+] where only digits were allowed.
... the toolkit version format supports the firefox version format but allows greater flexibility.
...And 66 more matches

Application Translation with Mercurial
check what is available for translation find out on which branch localization is done for your locale: read your localization team's page by clicking on the team with your language code (e.g.
...the localization lead for your language knows the branch.
... the default localization branch is aurora.
...And 56 more matches

Background audio processing using AudioWorklet - Web APIs
when the web audio api was first introduced to browsers, it included the ability to use javascript code to create custom audio processors that would be invoked to perform real-time audio manipulations.
... the drawback to scriptprocessornode was simple: it ran on the main thread, thus blocking everything else going on until it completed execution.
... this was far less than ideal, especially for something that can be as computationally expensive as audio processing.
...And 55 more matches

Chapter 6: Firefox extensions and XUL applications - Archive of obsolete content
« previous this document was authored by taro (btm) matsuzawa and was originally published in japanese for the firefox developers conference summer 2007.
... matsuzawa-san is a co-author of firefox 3 hacks (o'reilly japan, 2008.) this chapter discusses tools to assist in developing extensions.
... tools for extension developers fixme: are we sure we'll talking about venkman since it's not well maintained fixme: we maybe should talk about firebug and chromebug fixme: and what about console 2 and docked-js console?
...And 43 more matches

Web audio spatialization basics - Web APIs
as if its extensive variety of sound processing (and other) options wasn't enough, the web audio api also includes facilities to allow you to emulate the difference in sound as a listener moves around a sound source, for example panning as you move around a sound source inside a 3d game.
... the official term for this is spatialization, and this article will cover the basics of how to implement such a system.
... basics of spatialization in web audio, complex 3d spatializations are created using the pannernode, which in layman's terms is basically a whole lotta cool maths to make audio appear in 3d space.
...And 41 more matches

RTCPeerConnection.setRemoteDescription() - Web APIs
the rtcpeerconnection method setremotedescription() sets the specified session description as the remote peer's current offer or answer.
... the description specifies the properties of the remote end of the connection, including the media format.
... the method takes a single parameter—the session description—and it returns a promise which is fulfilled once the description has been changed, asynchronously.
...And 40 more matches

Encryption and Decryption - Archive of obsolete content
encryption is the process of transforming information so it is unintelligible to anyone but the intended recipient.
... decryption is the process of transforming encrypted information so that it is intelligible again.
... a cryptographic algorithm, also called a cipher, is a mathematical function used for encryption or decryption.
...And 37 more matches

Arrow function expressions - JavaScript
an arrow function expression is a syntactically compact alternative to a regular function expression, although without its own bindings to the this, arguments, super, or new.target keywords.
... arrow function expressions are ill suited as methods, and they cannot be used as constructors.
... syntax basic syntax (param1, param2, …, paramn) => { statements } (param1, param2, …, paramn) => expression // equivalent to: => { return expression; } // parentheses are optional when there's only one parameter name: (singleparam) => { statements } singleparam => { statements } // the parameter list for a function with no parameters should be written with a pair of parentheses.
...And 36 more matches

Chapter 1: Introduction to Extensions - Archive of obsolete content
« previousnext » note: if you want contribute to this document please following guidelines from the contribute page.
...emura-san is a co-author of firefox 3 hacks (o'reilly japan, 2008.) introduction if you're reading this guide, you’ve probably used firefox before.
...perhaps things like fine-grained tab controls, mouse gestures, extensive toolbars and buttons, a feed reader, integration with a variety of web applications, or sophisticated tools to assist with web design.
...And 35 more matches

Initialization and Destruction - Plugins
« previousnext » this chapter describes the methods that provide the basic processes of initialization, instance creation and destruction, and shutdown.
... initialization: the browser calls the plug-in api function np_initialize when the plug-in code is first loaded.
... instance creation: the browser calls the plug-in api function npp_new when the instance is created.
...And 34 more matches

Version, UI, and Status Information - Plugins
« previousnext » this chapter describes the functions that allow a plug-in to display a message on the status line, get agent information, and check on the current version of the plug-in api and the browser.
... displaying a status line message users are accustomed to checking the ui status line at the bottom of the browser window for updates on the progress of an operation or the url of a link on the page.
... you can also use the status line to notify the user of plug-in-related information.
...And 31 more matches

Application cache implementation overview
all top level document loading (navigation) channels are set chooseapplicationcache flag, which happens in nsdocshell::douriload().
... channels having that flag set are searching for nsiapplicationcache object prior inspecting normal http cache.
... nsiapplicationcacheservice::chooseapplicationcache is given the url the channel is about to load.
...And 30 more matches

RTCPeerConnection.setLocalDescription() - Web APIs
the rtcpeerconnection method setlocaldescription() changes the local description associated with the connection.
... this description specifies the properties of the local end of the connection, including the media format.
... the method takes a single parameter—the session description—and it returns a promise which is fulfilled once the description has been changed, asynchronously.
...And 30 more matches

Attestation and Assertion - Web APIs
there are two different types of certificates used in webauthn for registration and authentication.
... they have similar names and similar purposes, but understanding the differences may be an initial point of confusion.
... the sections below describe attestation, which happens during registration, and assertion which happens during authentication.
...And 30 more matches

Audio and video manipulation - Developer guides
having native audio and video in the browser means we can use these data streams with technologies such as <canvas>, webgl or web audio api to modify audio and video directly, for example adding reverb/compression effects to audio, or grayscale/sepia filters to video.
... video manipulation the ability to read the pixel values from each frame of a video can be very useful.
... var processor = { timercallback: function() { if (this.video.paused || this.video.ended) { return; } this.computeframe(); var self = this; settimeout(function () { self.timercallback(); }, 16); // roughly 60 frames per second }, doload: function() { this.video = document.getelementbyid("my-video"); this.c1 = document.getelementbyid("my-canvas"); this.ctx1 = this.c1.getcontext("2d"); ...
...And 30 more matches

MediaSessionActionDetails - Web APIs
the media session api's mediasessionactiondetails dictionary is the type used by the sole input parameter into the callback which is executed when a media session action occurs.
... it specifies the type of action which needs to be performed as well as the data needed to perform the action.
... properties action a media session action type string taken from the mediasessionaction enumerated type, indicating which type of action needs to be performed.
...And 29 more matches

Introducing the Audio API extension - Archive of obsolete content
the audio data api extension extends the html5 specification of the <audio> and <video> media elements by exposing audio metadata and raw audio data.
... this enables users to visualize audio data, to process this audio data and to create new audio data.
...avoid using it and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision.
...And 28 more matches

Common causes of memory leaks in extensions - Extensions
this page explains coding patterns that cause extension to cause memory leaks.
... all zombie compartments in extensions are caused by a failure to release resources appropriately in certain circumstances, such as when a window is closed, a page unloads, or an extension is disabled or removed.
... storing references to window objects and dom nodes the most common problem is extensions holding onto references to content windows for too long.
...And 28 more matches

ServiceWorkerRegistration.showNotification() - Web APIs
the shownotification() method of the serviceworkerregistration interface creates a notification on an active service worker.
... syntax ​serviceworkerregistration.shownotification(title, [options]); parameters title the title that must be shown within the notification options optional an object that allows configuring the notification.
... it can have the following properties: actions: an array of actions to display in the notification.
...And 28 more matches

transition-timing-function - CSS: Cascading Style Sheets
the transition-timing-function css property sets how intermediate values are calculated for css properties being affected by a transition effect.
... this, in essence, lets you establish an acceleration curve so that the speed of the transition can vary over its duration.
... this acceleration curve is defined using one <timing-function> for each property to be transitioned.
...And 27 more matches

animation-timing-function - CSS: Cascading Style Sheets
the animation-timing-function css property sets how an animation progresses through the duration of each cycle.
... it is often convenient to use the shorthand property animation to set all animation properties at once.
... syntax /* keyword values */ animation-timing-function: ease; animation-timing-function: ease-in; animation-timing-function: ease-out; animation-timing-function: ease-in-out; animation-timing-function: linear; animation-timing-function: step-start; animation-timing-function: step-end; /* function values */ animation-timing-function: cubic-bezier(0.1, 0.7, 1.0, 0.1); animation-timing-function: steps(4, end); /* steps function keywords */ animation-timing-function: steps(4, jump-start); animation-timing-function: steps(10, jump-end); animation-timing-function: steps(20, jump-none); animation-timing-function: steps(5, jump-both); animation-timing-function: steps(6, start); animation-timing-function: steps(8, end); /* multiple animations */ animation-timing-function: ease, step-start, cubic...
...And 24 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.
... i resist including this function in nspr because it results in bad programming practice and unsupportable programs.
...abrupt termination has been available in the unix/c environment for some time (exit()), and i assume that the basic semantics defined there are applicable here.
...And 23 more matches

MediaSession.setActionHandler() - Web APIs
the setactionhandler() property of the mediasession interface sets an event handler for a media session action.
... these actions let a web app receive notifications when the user engages a device's built-in physical or onscreen media controls, such as play, stop, or seek buttons.
... syntax navigator.mediasession.setactionhandler(type, callback) parameters type a domstring representing an action type to listen for.
...And 21 more matches

Media Session action types - Web APIs
to support an action on a media session, such as seeking, pausing, or changing tracks, you need to call the mediasession interface's setactionhandler() method to establish a handler for that action.
... the specific type of media session action to be handled on a mediasession is identified using a string from the mediasessionaction enumerated type.
... syntax a media session action's type is specified using a string from the mediasessionaction enumerated type.
...And 21 more matches

Function expression - JavaScript
the function keyword can be used to define a function inside an expression.
... you can also define functions using the function constructor and a function declaration.
... syntax the expression is not allowed at the start of a statement.
...And 20 more matches

Bounding volume collision detection with THREE.js - Game development
this article shows how to implement collision detection between bounding boxes and spheres using the three.js library.
... it is assumed that before reading this you have read our 3d collision detection introductory article first, and have basic knowledge about three.js.
...once instantiated, they have methods available to do intersection tests against other volumes.
...And 19 more matches

AudioBufferSourceNode.AudioBufferSourceNode() - Web APIs
the audiobuffersourcenode() constructor creates a new audiobuffersourcenode object instance.
... syntax var audiobuffersourcenode = new audiobuffersourcenode(context, options) parameters inherits parameters from the audionodeoptions dictionary.
... context a reference to an audiocontext.
...And 19 more matches

Notification.Notification() - Web APIs
the notification() constructor creates a new notification object instance, which represents a user notification.
... syntax var mynotification = new notification(title, options); parameters title defines a title for the notification, which is shown at the top of the notification window.
... options optional an options object containing any custom settings that you want to apply to the notification.
...And 19 more matches

PublicKeyCredentialRequestOptions.extensions - Web APIs
extensions, an optional property of the publickeycredentialrequestoptions dictionary, is an object providing the client extensions and their input values.
... extensions are values requesting additional processing by the client and by the authenticator.
... for instance, extensions may be used for: backward compatibility with the legacy fido js api, knowing the user verification process, etc.
...And 19 more matches

RTCSessionDescription - Web APIs
the rtcsessiondescription interface describes one end of a connection—or potential connection—and how it's configured.
... each rtcsessiondescription consists of a description type indicating which part of the offer/answer negotiation process it describes and of the sdp descriptor of the session.
... the process of negotiating a connection between two peers involves exchanging rtcsessiondescription objects back and forth, with each description suggesting one combination of connection configuration options that the sender of the description supports.
...And 19 more matches

XRSession.requestAnimationFrame() - Web APIs
the xrsession method requestanimationframe(), much like the window method of the same name, schedules a callback to be executed the next time the browser is ready to paint the session's virtual environment to the xr display.
... the specified callback is executed once before the next repaint; if you wish for it to be executed for the following repaint, you must call requestanimationframe() again.
... the callback takes two parameters as inputs: an xrframe describing the state of all tracked objects for the session, and a time stamp you can use to compute any animation updates needed.
...And 19 more matches

Privacy, permissions, and information security
as users use the web for more and more of their daily tasks, more of their private or personally-identifying information they share, ideally only with sites they trust.
... cooperation among web content, the web browser, and the web server is needed to achieve as much privacy and information security as possible.
... in this article, we examine how to create web content that minimizes the risk of users' personal information or imagery being obtained unexpectedly by third parties.
...And 19 more matches

RTCPeerConnection.setConfiguration() - Web APIs
the rtcpeerconnection.setconfiguration() method sets the current configuration of the rtcpeerconnection based on the values included in the specified rtcconfiguration object.
... this lets you change the ice servers used by the connection and which transport policies to use.
...two potential scenarios in which this might be done: the rtcpeerconnection was instantiated without specifying any ice servers.
...And 18 more matches

animation-direction - CSS: Cascading Style Sheets
the animation-direction css property sets whether an animation should play forward, backward, or alternate back and forth between playing the sequence forward and backward.
... it is often convenient to use the shorthand property animation to set all animation properties at once.
... syntax /* single animation */ animation-direction: normal; animation-direction: reverse; animation-direction: alternate; animation-direction: alternate-reverse; /* multiple animations */ animation-direction: normal, reverse; animation-direction: alternate, reverse, normal; /* global values */ animation-direction: inherit; animation-direction: initial; animation-direction: unset; values normal the animation plays forwards each cycle.
...And 18 more matches

3D collision detection - Game development
this article provides an introduction to the different bounding volume techniques used to implement collision detection in 3d environments.
... followup articles will cover implementations in specific 3d libraries.
... axis-aligned bounding boxes as with 2d collision detection, axis-aligned bounding boxes (aabb) are the quickest algorithm to determine whether the two game entities are overlapping or not.
...And 17 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 17 more matches

2D collision detection - Game development
algorithms to detect collision in 2d games depend on the type of shapes that can collide (e.g.
...generally you will have a simple generic shape that covers the entity known as a "hitbox" so even though collision may not be pixel perfect, it will look good enough and be performant across multiple entities.
... this article provides a review of the most common techniques used to provide collision detection in 2d games.
...And 16 more matches

GlobalEventHandlers.onanimationiteration - Web APIs
the onanimationiteration property of the globaleventhandlers mixin is the eventhandler for processing animationiteration events.
... the animationiteration event is sent when a css animation reaches the end of an iteration.
... an iteration ends when a single pass through the sequence of animation instructions is completed by executing the last animation step.
...And 16 more matches

transition-duration - CSS: Cascading Style Sheets
the transition-duration css property sets the length of time a transition animation should take to complete.
... by default, the value is 0s, meaning that no animation will occur.
... you may specify multiple durations; each duration will be applied to the corresponding property as specified by the transition-property property, which acts as a master list.
...And 16 more matches

Collision detection - Game development
« previousnext » this is the 7th step out of 10 of the gamedev canvas tutorial.
...we need to think about adding collision detection so it can bounce off the bricks and break them.
... it's our decision how to implement this, of course, but it can be tough to calculate whether the ball is touching the rectangle or not because there are no helper functions in canvas for this.
...And 15 more matches

Ember Interactivity: Footer functionality, conditional rendering - Learn web development
previous overview: client-side javascript frameworks next now it's time to start tackling the footer functionality in our app.
...along the way, we'll learn about using conditional rendering in our templates.
... objective: to continue our learning about components classes, start looking at conditional rendering, and wire up some of our footer functionality.
...And 15 more matches

MutationObserver.MutationObserver() - Web APIs
the dom mutationobserver() constructor — part of the mutationobserver interface — creates and returns a new observer which invokes a specified callback when dom events occur.
... dom observation does not begin immediately; the observe() method must be called first to establish which portion of the dom to watch and what kinds of changes to watch for.
... syntax const observer = new mutationobserver(callback) parameters callback a function which will be called on each dom change that qualifies given the observed node or subtree and options.
...And 15 more matches

RTCPeerConnection.iceConnectionState - Web APIs
the read-only property rtcpeerconnection.iceconnectionstate returns an enum of type rtciceconnectionstate which state of the ice agent associated with the rtcpeerconnection.
... you can detect when this value has changed by watching for the iceconnectionstatechange event.
... syntax var state = rtcpeerconnection.iceconnectionstate; value the current state of the ice agent and its connection.
...And 15 more matches

RTCSessionDescription() - Web APIs
the rtcsessiondescription() constructor creates a new rtcsessiondescription with its properties initialized as described in the specified object.
... this constructor has been deprecated because rtcpeerconnection.setlocaldescription() and other methods which take sdp as input now directly accept an object conforming to the rtcsessiondescriptioninit dictionary, so you don't have to instantiate an rtcsessiondescription yourself.
... syntax sessiondescription = new rtcsessiondescription(rtcsessiondescriptioninit); values rtcsessiondescriptioninit optional an object providing the default values for the session description; the object conforms to the rtcsessiondescriptioninit dictionary.
...And 15 more matches

SecurityPolicyViolationEvent - Web APIs
the securitypolicyviolationevent interface inherits from event, and represents the event object of an event sent on a document or worker when its content security policy is violated.
... constructor securitypolicyviolationevent() creates a new securitypolicyviolationevent object instance.
... properties securitypolicyviolationevent.blockeduriread only a usvstring representing the uri of the resource that was blocked because it violates a policy.
...And 15 more matches

function declaration - JavaScript
the function declaration (function statement) defines a function with the specified parameters.
... you can also define functions using the function constructor and a function expression.
... syntax function name([param[, param,[..., param]]]) { [statements] } name the function name.
...And 15 more matches

Communication between HTML and your extension - Archive of obsolete content
see also interaction between privileged and non-privileged pages.
... communication between an html page and and extension after building a sample extension by reading carefully and following the complete instructions for building an extension i was able to get an extension that could display something on the status bar.
... what i wanted to do was have an extension "look" for something on an html page and if it found that something perform some operation on the found thing and then update the status bar with the results of the operation.
...And 14 more matches

PublicKeyCredentialCreationOptions - Web APIs
the publickeycredentialcreationoptions dictionary of the web authentication api holds options passed to navigators.credentials.create() in order to create a publickeycredential.
... properties publickeycredentialcreationoptions.rp an object describing the relying party which requested the credential creation.
... publickeycredentialcreationoptions.user an object describing the user account for which the credential is generated.
...And 14 more matches

RTCPeerConnection: iceconnectionstatechange event - Web APIs
an iceconnectionstatechange event is sent to an rtcpeerconnection object each time the ice connection state changes during the negotiation process.
... the new ice connection state is available in the object's iceconnectionstate} property.
... bubbles no cancelable no interface event event handler property oniceconnectionstatechange one common task performed by the iceconnectionstatechange event listener: to trigger ice restart when the state changes to failed.
...And 14 more matches

Visualizations with Web Audio API - Web APIs
one of the most interesting features of the web audio api is the ability to extract frequency, waveform, and other data from your audio source, which can then be used to create visualizations.
... basic concepts to extract data from your audio source, you need an analysernode, which is created using the audiocontext.createanalyser() method, for example: var audioctx = new (window.audiocontext || window.webkitaudiocontext)(); var analyser = audioctx.createanalyser(); this node is then connected to your audio source at some point between your source and your destination, for example: source = audioctx.createmediastreamsource(stream); source.connect(analyser); analyser.connect(distortion); distortion.connect(audioctx.destination); note: you don't need to connect the analyser's output to another node for it to work...
... the analyser node will then capture audio data using a fast fourier transform (fft) in a certain frequency domain, depending on what you specify as the analysernode.fftsize property value (if no value is specified, the default is 2048.) note: you can also specify a minimum and maximum power value for the fft data scaling range, using analysernode.mindecibels and analysernode.maxdecibels, and different data averaging constants using analysernode.smoothingtimeconstant.
...And 14 more matches

<caption>: The Table Caption element - HTML: Hypertext Markup Language
the html <caption> element specifies the caption (or title) of a table.
... tag omission the end tag can be omitted if the element is not immediately followed by ascii whitespace or a comment.
... implicit aria role no corresponding role permitted aria roles no role permitted dom interface htmltablecaptionelement attributes this element includes the global attributes.
...And 14 more matches

<figure>: The Figure with Optional Caption element - HTML: Hypertext Markup Language
the html <figure> (figure with optional caption) element represents self-contained content, potentially with an optional caption, which is specified using the (<figcaption>) element.
... the figure, its caption, and its contents are referenced as a single unit.
... content categories flow content, sectioning root, palpable content.
...And 14 more matches

IntersectionObserver.IntersectionObserver() - Web APIs
the intersectionobserver() constructor creates and returns a new intersectionobserver object.
... syntax var observer = new intersectionobserver(callback[, options]); parameters callback a function which is called when the percentage of the target element is visible crosses a threshold.
... the callback receives as input two parameters: entries an array of intersectionobserverentry objects, each representing one threshold which was crossed, either becoming more or less visible than the percentage specified by that threshold.
...And 13 more matches

RTCPeerConnection.connectionState - Web APIs
the read-only connectionstate property of the rtcpeerconnection interface indicates the current state of the peer connection by returning one of the string values specified by the enum rtcpeerconnectionstate.
... when this property's value changes, a connectionstatechange event is sent to the rtcpeerconnection instance.
... syntax var connectionstate = rtcpeerconnection.connectionstate; value the current state of the connection, as a value from the enum rtcpeerconnectionstate.
...And 13 more matches

XRPermissionDescriptor.optionalFeatures - Web APIs
the xrpermissiondescriptor dictionary's optionalfeatures property is used to specify a list of webxr features which your app or site would like to use but can operate without if permission isn't granted to use them.
... syntax xrpermissiondescriptor = { mode: xrsessionmode, requiredfeatures: reqfeaturelist, optionalfeatures: optfeaturelist }; xrpermissiondescriptor.optionalfeatures = optfeaturelist; optfeaturelist = xrpermissiondescriptor.optionalfeatures; value an array of strings taken from the xrreferencespacetype enumerated type, indicating set of features that your app would like to use, but can operate without if permission to use them isn't available.
... while further features may be defined in future editions of webxr, currently all permitted values come from the xrreferencespacetype enumerated type, indicating reference spaces the app rquires to be available.
...And 13 more matches

AudioListener.setOrientation() - Web APIs
the setorientation() method of the audiolistener interface defines the orientation of the listener.
... it consists of two direction vectors: the front vector, defined by the three unitless parameters x, y and z, describes the direction of the face of the listener, that is the direction the nose of the person is pointing towards.
... the up vector, defined by three unitless parameters xup, yup and zup, describes the direction of the top of the listener's head.
...And 12 more matches

AudioWorkletNodeOptions - Web APIs
the audioworkletnodeoptions dictionary of the web audio api is used to specify configuration options when constructing a new audioworkletnode object for custom audio processing.
... it is only used when calling the audioworkletnode() constructor.
... during internal instantiation of the underlying audioworkletprocessor, the the structured clone algorithm is applied to the options object and the result is passed into audioworkletprocessor's constructor.
...And 12 more matches

BaseAudioContext.decodeAudioData() - Web APIs
the decodeaudiodata() method of the baseaudiocontext interface is used to asynchronously decode audio file data contained in an arraybuffer.
...the decoded audiobuffer is resampled to the audiocontext's sampling rate, then passed to a callback or promise.
... this is the preferred method of creating an audio source for web audio api from an audio track.
...And 12 more matches

<option>: The HTML Option element - HTML: Hypertext Markup Language
the html <option> element is used to define an item contained in a <select>, an <optgroup>, or a <datalist> element.
... as such, <option> can represent menu items in popups and other lists of items in an html document.
... tag omission the start tag is mandatory.
...And 12 more matches

<section>: The Generic Section element - HTML: Hypertext Markup Language
the html <section> element represents a standalone section — which doesn't have a more specific semantic element to represent it — contained within an html document.
... typically, but not always, sections have a heading.
... as an example, a navigation menu should be wrapped in a <nav> element, but a list of search results and a map display and its controls don't have specific elements, and could be put inside a <section>.
...And 12 more matches

async function expression - JavaScript
the async function keyword can be used to define async functions inside expressions.
... you can also define async functions using an async function statement.
... syntax async function [name]([param1[, param2[, ..., paramn]]]) { statements } as of es2015, you can also use arrow functions.
...And 12 more matches

AudioContextOptions - Web APIs
the audiocontextoptions dictionary is used to specify configuration options when constructing a new audiocontext object to represent a graph of web audio nodes.
... it is only used when calling the audiocontext() constructor.
... properties latencyhint optional the type of playback that the context will be used for, as a value from the audiocontextlatencycategory enum or a double-precision floating-point value indicating the preferred maximum latency of the context in seconds.
...And 11 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.
... syntax var audioctx = new audiocontext(); var mylistener = audioctx.listener; mylistener.positionx.value = 1; value an audioparam.
... example in the following example, you can see an example of how the createpanner() method, audiolistener and pannernode would be used to control audio spatialisation.
...And 11 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.
... syntax var audioctx = new audiocontext(); var mylistener = audioctx.listener; mylistener.positiony.value = 1; value an audioparam.
... example in the following example, you can see an example of how the createpanner() method, audiolistener and pannernode would be used to control audio spatialisation.
...And 11 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.
... syntax var audioctx = new audiocontext(); var mylistener = audioctx.listener; mylistener.positionz.value = 1; value an audioparam.
... example in the following example, you can see an example of how the createpanner() method, audiolistener and pannernode would be used to control audio spatialisation.
...And 11 more matches

AuthenticatorAttestationResponse.attestationObject - Web APIs
the attestationobject property of the authenticatorattestationresponse interface returns an arraybuffer containing the new public key, as well as signature over the entire attestationobject with a private key that is stored in the authenticator when it is manufactured.
... as part of the credentialscontainer.create() call, an authenticator will create a new keypair as well as an attestationobject for that keypair.
... the public key that corresponds to the private key that has created the attestation signature is well known; however, there are various well known attestation public key chains for different ecosystems (for example, android or tpm attestations).
...And 11 more matches

Notification.requestPermission() - Web APIs
note: this feature is not available in sharedworker note: safari still uses the callback syntax to get the permission.
... read using the notifications api for a good example of how to feature detect this and run code as appropriate.
... the requestpermission() method of the notification interface requests permission from the user for the current origin to display notifications.
...And 11 more matches

application/http-index-format specification - Archive of obsolete content
the application/http-index-format file format is an attempt to provide a generic, extensible file listing format that is principly machine readable.
... 101 pre formatted human readable information line.
... 102 a human readable information line in html format.
...And 10 more matches

Collision detection - Game development
« previousnext » this is the 10th step out of 16 of the gamedev phaser tutorial.
... now onto the next challenge — the collision detection between the ball and the bricks.
... luckily enough we can use the physics engine to check collisions not only between single objects (like the ball and the paddle), but also between an object and the group.
...And 10 more matches

First-class Function - MDN Web Docs Glossary: Definitions of Web-related terms
a programming language is said to have first-class functions when functions in that language are treated like any other variable.
... for example, in such a language, a function can be passed as an argument to other functions, can be returned by another function and can be assigned as a value to a variable.
... example | assign a function to a variable javascript const foo = function() { console.log("foobar"); } // invoke it using the variable foo(); we assigned an anonymous function in a variable, then we used that variable to invoke the function by adding parentheses () at the end.
...And 10 more matches

Function - MDN Web Docs Glossary: Definitions of Web-related terms
a function is a code snippet that can be called by other code or by itself, or a variable that refers to the function.
... when a function is called, arguments are passed to the function as input, and the function can optionally return a value.
... a function in javascript is also an object.
...And 10 more matches

AnimationEvent.initAnimationEvent() - Web APIs
summary the animationevent.initanimationevent() method initializes an animation event created using the deprecated document.createevent("animationevent") method.
... animationevent created this way are untrusted.
... note: during the standardization process, this method was removed from the specification.
...And 10 more matches

OfflineAudioContext.OfflineAudioContext() - Web APIs
the offlineaudiocontext() constructor—part of the web audio api—creates and returns a new offlineaudiocontext object instance, which can then be used to render audio to an audiobuffer rather than to an audio output device.
... syntax var offlineaudioctx = new offlineaudiocontext(numberofchannels, length, samplerate); var offlineaudioctx = new offlineaudiocontext(options); parameters you can specify the parameters for the offlineaudiocontext() constructor as either the same set of parameters as are inputs into the audiocontext.createbuffer() method, or by passing those parameters in an options object.
... numberofchannels an integer specifying the number of channels the resulting audiobuffer should have.
...And 10 more matches

Legacy generator function expression - Archive of obsolete content
the legacy generator function expression was a spidermonkey-specific feature, which is removed in firefox 58+.
... for future-facing usages, consider using the function* expression.
... the function keyword can be used to define a legacy generator function inside an expression.
...And 9 more matches

Localizing extension descriptions
this article provides details on how to go about localizing the descriptions of mozilla add-ons, as well as for other metadata about your add-on.
... because a new method for doing so was implemented in gecko 1.9 (firefox 3), there are two sets of instructions below.
... localizing in gecko 1.9 gecko 1.9 includes a new, more robust method for localizing add-on descriptions and other metadata.
...And 9 more matches

Building a Thunderbird extension 1: introduction
thunderbird is a community managed open-source email application.
...similar to firefox, thunderbird functionality can be enhanced and customized via extensions.
... warning: this content is for older versions of thunderbird.
...And 9 more matches

IDBVersionChangeEvent.newVersion - Web APIs
the newversion read-only property of the idbversionchangeevent interface returns the new version number of the database.
... syntax var newversion = idbversionchangeevent.newversion value a 64-bit integer.
...these events are fired via the custom idbversionchangeevent interface.
...And 9 more matches

MSManipulationEvent.initMSManipulationEvent() - Web APIs
do not use it on production sites facing the web: it will not work for every user.
... there may also be large incompatibilities between implementations and the behavior may change in the future.
... the initmsmanipulationevent method is used to create a msmanipulationevent that can be called from javascript.
...And 9 more matches

RTCPeerConnection.onnegotiationneeded - Web APIs
the rtcpeerconnection interface's onnegotiationneeded property is an eventlistener which specifies a function which is called to handle the negotiationneeded event when it occurs on an rtcpeerconnection instance.
... this event is fired when a change has occurred which requires session negotiation.
... this negotiation should be carried out as the offerer, because some session changes cannot be negotiated as the answerer.
...And 9 more matches

animation-iteration-count - CSS: Cascading Style Sheets
the animation-iteration-count css property sets the number of times an animation sequence should be played before stopping.
... if multiple values are specified, each time the animation is played the next value in the list is used, cycling back to the first value after the last one is used.
... it is often convenient to use the shorthand property animation to set all animation properties at once.
...And 9 more matches

<nav>: The Navigation Section element - HTML: Hypertext Markup Language
the html <nav> element represents a section of a page whose purpose is to provide navigation links, either within the current document or to other documents.
... common examples of navigation sections are menus, tables of contents, and indexes.
... content categories flow content, sectioning content, palpable content.
...And 9 more matches

function* expression - JavaScript
the function* keyword can be used to define a generator function inside an expression.
... syntax function* [name]([param1[, param2[, ..., paramn]]]) { statements } parameters name optional the function name.
... can be omitted, in which case the function is anonymous.
...And 9 more matches

Additional Navigation - Archive of obsolete content
« previousnext » retrieving literals the triples used so far have all had variables in both the subject and object.
...the builder won't generate any output in this situation.
... source navigation triples may also be used to navigate up the graph as well as downwards, following the graph arrows in the reverse direction.
...And 8 more matches

AudioDestinationNode - Web APIs
the audiodestinationnode interface represents the end destination of an audio graph in a given context — usually the speakers of your device.
... it can also be the node that will "record" the audio data when used with an offlineaudiocontext.
... audiodestinationnode has no output (as it is the output, no more audionode can be linked after it in the audio graph) and one input.
...And 8 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 8 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 8 more matches

RTCPeerConnection: negotiationneeded event - Web APIs
a negotiationneeded event is sent to the rtcpeerconnection when negotiation of the connection through the signaling channel is required.
... this occurs both during the initial setup of the connection as well as any time a change to the communication environment requires reconfiguring the connection.
... bubbles no cancelable no interface event event handler property rtcpeerconnection.onnegotiationneeded the negotiationneeded event is first dispatched to the rtcpeerconnection when media is first added to the connection.
...And 8 more matches

animation-duration - CSS: Cascading Style Sheets
the animation-duration css property sets the length of time that an animation takes to complete one cycle.
... it is often convenient to use the shorthand property animation to set all animation properties at once.
... syntax /* single animation */ animation-duration: 6s; animation-duration: 120ms; /* multiple animations */ animation-duration: 1.64s, 15.22s; animation-duration: 10s, 35s, 230ms; values <time> the time that an animation takes to complete one cycle.
...And 8 more matches

Orientation and motion data explained - Developer guides
summary when using orientation and motion events, it's important to understand what the values you're given by the browser mean.
... about coordinate frames a coordinate frame is a system whereby the orientation of the three axes (x, y, and z) are defined in reference to an object.
... there are two coordinate frames to consider when using orientation and motion events: earth coordinate frame the earth coordinate frame is the coordinate frame fixed on the center of the earth; that is, the axes are aligned based on the pull of gravity and the standard magnetic north orientation.
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Updating an extension to support multiple Mozilla applications - Archive of obsolete content
« previousnext » this article shows how to take an existing extension and update it so that it can be used in additional mozilla applications.
... we'll build upon the stock watcher extension created in earlier articles in this series, updating it so it can also be used in thunderbird and sunbird (previous versions worked only in firefox).
... if you haven't already created an extension, or would like to refresh your memory, take a look at the previous articles in this series: creating a status bar extension creating a dynamic status bar extension adding preferences to an extension localizing an extension download the sample you can download this article's sample code so you can look at it side-by-side with the article, or to use it as a basis for your own extension.
...And 7 more matches

Color vision simulation - Firefox Developer Tools
the simulator in the accessibility inspector in firefox developer tools lets you see what a web page would look like to users with various forms of color vision deficiency (better known as "color blindness"), as well as contrast sensitivity loss.
... "color blindness" is a bit of a misnomer, since most people with these disorders can see colors, but do not see all of the distinctions that people with normal color vision can see; color vision deficiencies affect perception across the color spectrum, not only of specific colors like red or green.
... color vision deficiencies affect about 8% of men, and 0.5% of women.
...And 7 more matches

AudioContext.createMediaStreamDestination() - Web APIs
the createmediastreamdestination() method of the audiocontext interface is used to create a new mediastreamaudiodestinationnode object associated with a webrtc mediastream representing an audio stream, which may be stored in a local file or sent to another computer.
... the mediastream is created when the node is created and is accessible via the mediastreamaudiodestinationnode's stream attribute.
... this stream can be used in a similar way as a mediastream obtained via navigator.getusermedia — it can, for example, be sent to a remote peer using the rtcpeerconnection addstream() method.
...And 7 more matches

DeviceOrientationEvent.DeviceOrientationEvent() - Web APIs
the deviceorientationevent constructor creates a new deviceorientationevent.
... syntax var deviceorientationevent = new deviceorientationevent(type[, options]) parameters type either "deviceorientation" or "deviceorientationabsolute".
... if the later, then options.absolute should be true.
...And 7 more matches

IDBVersionChangeEvent.oldVersion - Web APIs
the oldversion read-only property of the idbversionchangeevent interface returns the old version number of the database.
... when the opened database doesn't exist yet, the value of oldversion is 0.
... syntax var oldversion = idbversionchangeevent.oldversion value a 64-bit integer.
...And 7 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.
... call this method on the navigator object's mediasession object.
... 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.
...And 7 more matches

NotificationAction - Web APIs
the notificationaction interface of the notifications api is used to represent action buttons the user can click to interact with notifications.
... these buttons' appearance and specific functionality vary across platforms but generally they provide a way to asynchronously show actions to the user in a notification.
... properties instance properties these properties are available only on instances of the notification object.
...And 7 more matches

PublicKeyCredentialCreationOptions.excludeCredentials - Web APIs
excludecredentials, an optional property of the publickeycredentialcreationoptions dictionary, is an array whose elements are descriptors for the public keys already existing for a given user.
... this is provided by the relying party's server if it wants to prevent creation of new credentials for an existing user.
... syntax excludecredentials = publickeycredentialcreationoptions.excludecredentials value an array whose elements are objects with the following properties: type a string describing type of public-key credential to be created.
...And 7 more matches

RTCPeerConnection.getConfiguration() - Web APIs
the rtcpeerconnection.getconfiguration() method returns an rtcconfiguration object which indicates the current configuration of the rtcpeerconnection on which the method is called.
... the returned configuration is the last configuration applied via setconfiguration(), or if setconfiguration() hasn't been called, the configuration the rtcpeerconnection was constructed with.
... the configuration includes a list of the ice servers used by the connection, information about transport policies, and identity information.
...And 7 more matches

ServiceWorkerRegistration.getNotifications() - Web APIs
the getnotifications() method of the serviceworkerregistration interface returns a list of the notifications in the order that they were created from the current origin via the current service worker registration.
... origins can have many active but differently-scoped service worker registrations.
... notifications created by one service worker on the same origin will not be available to other active services workers on that same origin.
...And 7 more matches

TransitionEvent.initTransitionEvent() - Web APIs
the transitionevent.inittransitionevent() method initializes a transition event created using the deprecated document.createevent("transitionevent") method.
... transitionevent created that way are untrusted.
...it has been deprecated and is in the progress of been removed from most implementation.
...And 7 more matches

Session Hijacking - MDN Web Docs Glossary: Definitions of Web-related terms
session hijacking occurs when an attacker takes over a valid session between two computers.
... the attacker steals a valid session id in order to break into the system and snoop data.
... most authentication occurs only at the start of a tcp session.
...And 6 more matches

AudioConfiguration - Web APIs
the audioconfiguration dictionary of the media capabilities api defines the audio file being tested when calling mediacapabilities.encodinginfo() or mediacapabilities.decodinginfo() to query whether a specific audio configuration is supported, smooth, and/or power efficient.
... properties the audioconfiguration dictionary is made up of four audio properties, including: contenttype: a valid audio mime type, for information on possible values and what they mean, see the web audio codec guide.
... channels: the number of channels used by the audio track.
...And 6 more matches

AudioNodeOptions - Web APIs
the audionodeoptions dictionary of the web audio api specifies options that can be used when creating new audionode objects.
... audionodeoptions is inherited from by the option objects of the different types of audio node constructors.
... syntax var audionodeoptions = { "channelcount" : 2, "channelcountmode" : "max", "channelinterpretation" : "discrete" } properties channelcount optional represents an integer used to determine how many channels are used when up-mixing and down-mixing connections to any inputs to the node.
...And 6 more matches

BaseAudioContext.createPeriodicWave() - Web APIs
the createperiodicwave() method of the baseaudiocontext interface is used to create a periodicwave, which is used to define a periodic waveform that can be used to shape the output of an oscillatornode.
... syntax var wave = audiocontext.createperiodicwave(real, imag[, constraints]); returns a periodicwave.
... parameters real an array of cosine terms (traditionally the a terms).
...And 6 more matches

DeviceMotionEvent.DeviceMotionEvent() - Web APIs
the devicemotionevent constructor creates a new devicemotionevent.
... syntax var devicemotionevent = new devicemotionevent(type[, options]) parameters type must be "devicemotion".
... optionsoptional options are as follows: acceleration: an object giving the acceleration of the device on the three axis x, y and z.
...And 6 more matches

Notification.permission - Web APIs
the permission read-only property of the notification interface indicates the current permission granted by the user for the current origin to display web notifications.
... syntax var permission = notification.permission; value a domstring representing the current permission.
... the value can be: granted: the user has explicitly granted permission for the current origin to display system notifications.
...And 6 more matches

RTCPeerConnection.currentLocalDescription - Web APIs
the read-only property rtcpeerconnection.currentlocaldescription returns an rtcsessiondescription object describing the local end of the connection as it was most recently successfully negotiated since the last time the rtcpeerconnection finished negotiating and connecting to a remote peer.
... also included is a list of any ice candidates that may already have been generated by the ice agent since the offer or answer represented by the description was first instantiated.
... to change the currentlocaldescription, call rtcpeerconnection.setlocaldescription(), which triggers a series of events which leads to this value being set.
...And 6 more matches

RTCPeerConnection.currentRemoteDescription - Web APIs
the read-only property rtcpeerconnection.currentremotedescription returns an rtcsessiondescription object describing the remote end of the connection as it was most recently successfully negotiated since the last time the rtcpeerconnection finished negotiating and connecting to a remote peer.
... also included is a list of any ice candidates that may already have been generated by the ice agent since the offer or answer represented by the description was first instantiated.
... to change the currentremotedescription, call rtcpeerconnection.setremotedescription(), which triggers a series of events which leads to this value being set.
...And 6 more matches

RTCPeerConnection.pendingLocalDescription - Web APIs
the read-only property rtcpeerconnection.pendinglocaldescription returns an rtcsessiondescription object describing a pending configuration change for the local end of the connection.
... this does not describe the connection as it currently stands, but as it may exist in the near future.
... use rtcpeerconnection.currentlocaldescription or rtcpeerconnection.localdescription to get the current state of the endpoint.
...And 6 more matches

RTCPeerConnection.pendingRemoteDescription - Web APIs
the read-only property rtcpeerconnection.pendingremotedescription returns an rtcsessiondescription object describing a pending configuration change for the remote end of the connection.
... this does not describe the connection as it currently stands, but as it may exist in the near future.
... use rtcpeerconnection.currentremotedescription or rtcpeerconnection.remotedescription to get the current session description for the remote endpoint.
...And 6 more matches

XRSession.cancelAnimationFrame() - Web APIs
the cancelanimationframe() method of the xrsession interface cancels an animation frame which was previously requested by calling requestanimationframe.
... syntax xrsession.cancelanimationframe(handle); parameters handle the unique value returned by the call to requestanimationframe() that previously scheduled the animation callback.
... usage notes this function has no effect if the specified handle cannot be found.
...And 6 more matches

SQL Injection - MDN Web Docs Glossary: Definitions of Web-related terms
sql injection takes advantage of web apps that fail to validate user input.
... hackers can maliciously pass sql commands through the web app for execution by a backend database.
... sql injection can gain unauthorized access to a database or to retrieve information directly from the database.
...And 5 more matches

Building a Thunderbird extension 2: extension file layout
warning: this content is for older versions of thunderbird.
...see developer.thunderbird.net for newer information.
... extensions are packaged and distributed in archive files (also known as bundles), with the xpi (pronounced “zippy”) file extension.
...And 5 more matches

AudioContextOptions.latencyHint - Web APIs
the audiocontextoptions dictionary (used when instantiating an audiocontext) may contain a property named latencyhint, which indicates the preferred maximum latency in seconds for the audio context.
... the value is specified either as a member of the string enum audiocontextlatencycategory or a double-precision value.
... syntax audiocontextoptions.latencyhint = "interactive"; audiocontextoptions.latencyhint = 0.2; var latencyhint = audiocontextoptions.latencyhint; value the preferred maximum latency for the audiocontext.
...And 5 more matches

AudioNode.channelInterpretation - Web APIs
the channelinterpretation property of the audionode interface represents an enumerated value describing the meaning of the channels.
... this interpretation will define how audio up-mixing and down-mixing will happen.
...this can be somewhat controlled by setting the audionode.channelinterpretation property to speakers or discrete: interpretation input channels output channels mixing rules speakers 1 (mono) 2 (stereo) up-mix from mono to stereo.
...And 5 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.
... you can also, optionally, specify an error handling callback function.
... syntax navigator.geolocation.watchposition(success[, error[, options]]) parameters success a callback function that takes a geolocationposition object as an input parameter.
...And 5 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 5 more matches

HTMLOptionsCollection - Web APIs
the htmloptionscollection interface represents a collection of <option> html elements (in document order) and offers methods and properties for selecting from the list as well as optionally altering its items.
... this object is returned only by the options property of select.
... <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/htmlcollection" target="_top"><rect x="1" y="1" width="140" height="50" fill="#fff" stroke="#d4dde4" stroke-width="2px" /><text x="71" y="30" font-size="12px" font-family="consolas,monaco,andale mono,monospace" fill="#4d4e53" text-anchor="middle" alignment-baseline="middle">htmlcollection</text></a><polyline points="141,25 151,20 151,30 141,25" stroke="#d4dde4" fill="none"/><line x1="151" y1="25" x2="181" y2="25" stroke="#d4dde4"/><a xlink:href="/docs/web/...
...And 5 more matches

MediaPositionState.position - Web APIs
the mediapositionstate dictionary's position property is used when calling the mediasession method setpositionstate() to provide the user agent with the current playback position, in seconds, of the currently-playing media.
... this information is then, in turn, used by the user agent to provide a user interface which displays media playback information to the viewer.
... 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.
...And 5 more matches

MediaSessionActionDetails.seekTime - Web APIs
the mediasessionactiondetails dictionary's seektime property is always included when a seekto action is sent to the action handler callback.
... its value is the absolute time, in seconds, to move the current play position to.
... to change the time by an offset rather than moving to an absolute time, the seekforward or seekbackward actions should be used instead.
...And 5 more matches

MediaStreamAudioDestinationNode - Web APIs
the mediastreamaudiodestinationnode interface represents an audio destination consisting of a webrtc mediastream with a single audiomediastreamtrack, which can be used in a similar way to a mediastream obtained from navigator.getusermedia.
... it is an audionode that acts as an audio destination, created using the audiocontext.createmediastreamdestination method.
... number of inputs 1 number of outputs 0 channel count 2 channel count mode "explicit" channel count interpretation "speakers" constructor mediastreamaudiodestinationnode.mediastreamaudiodestinationnode() creates a new mediastreamaudiodestinationnode object instance.
...And 5 more matches

PublicKeyCredentialCreationOptions.challenge - Web APIs
the challenge property of the publickeycredentialcreationoptions dictionary is a buffersource used as a cryptographic challenge.
...this value (among other client data) will be signed by the authenticator, using its private key, and must be sent back for verification to the server as part of authenticatorattestationresponse.attestationobject.
... note: when the credential is retrieved with a navigator.credentials.get() call, the signature of the challenge is contained in authenticatorassertionresponse.signature.
...And 5 more matches

PushSubscription.options - Web APIs
the options read-only property of the pushsubscription interface is an object containing containing the options used to create the subscription.
... syntax var options = pushsubscription.options value an read-only options object containing the following values: uservisibleonly: a boolean, indicating that the returned push subscription will only be used for messages whose effect is made visible to the user.
... applicationserverkey: a public key your push server will use to send messages to client apps via a push server.
...And 5 more matches

RTCPeerConnection.onconnectionstatechange - Web APIs
the rtcpeerconnection.onconnectionstatechange property specifies an eventhandler which is called to handle the connectionstatechange event when it occurs on an instance of rtcpeerconnection.
... this happens whenever the aggregate state of the connection changes.
... the aggregate state is a combination of the states of all of the individual network transports being used by the connection.
...And 5 more matches

RTCPeerConnection.oniceconnectionstatechange - Web APIs
the rtcpeerconnection.oniceconnectionstatechange property is an event handler which specifies a function to be called when the iceconnectionstatechange event is fired on an rtcpeerconnection instance.
... this happens when the state of the connection's ice agent, as represented by the iceconnectionstate property, changes.
... syntax rtcpeerconnection.oniceconnectionstatechange = eventhandler; value this event handler can be set to function which is passed a single input parameter: an event object describing the iceconnectionstatechange event which occurred.
...And 5 more matches

RTCSessionDescription.type - Web APIs
the property rtcsessiondescription.type is a read-only value of type rtcsdptype which describes the description's type.
... syntax var value = sessiondescription.type; sessiondescription.type = value; value the possible values are defined by an enum of type rtcsdptype.
... the allowed values are those of an enum of type rtcsdptype: "offer", the description is the initial proposal in an offer/answer exchange.
...And 5 more matches

ServiceWorkerRegistration.navigationPreload - Web APIs
the navigationpreload read-only property of the serviceworkerregistration interface returns the navigationpreloadmanager associated with the current service worker registration.
... syntax var navigationpreloadmanager = serviceworkerregistration.navigationpreload; value an instance of navigationpreloadmanager.
... specifications specification status comment service workersthe definition of 'navigationpreload' in that specification.
...And 5 more matches

<figcaption>: The Figure Caption element - HTML: Hypertext Markup Language
the html <figcaption> or figure caption element represents a caption or legend describing the rest of the contents of its parent <figure> element.
... tag omission none, both the starting and ending tag are mandatory.
... permitted parents a <figure> element; the <figcaption> element must be its first or last child.
...And 5 more matches

lossy compression - MDN Web Docs Glossary: Definitions of Web-related terms
lossy compression, or irreversible compression, is a data-compression method that uses inexact approximations and partial-data discarding to represent content.
... in simpler terms: lossy compression causes data from the initial file to be lost, possibly causing degradation in quality.
... the process of such compression is irreversible; once lossy compression of the content has been performed, the content cannot be restored to its original state.
...And 4 more matches

AudioContextOptions.sampleRate - Web APIs
the audiocontextoptions dictionary (used when instantiating an audiocontext) may contain a property named samplerate, which indicates the sample rate to use for the new context.
... the value must be a floating-point value indicating the sample rate, in samples per second, for which to configure the new context; additionally, the value must be one which is supported by audiobuffer.samplerate.
... syntax audiocontextoptions.samplerate = 44100; var samplerate = audiocontextoptions.samplerate; value the desired sample rate for the audiocontext, specified in samples per second.
...And 4 more matches

FullscreenOptions.navigationUI - Web APIs
the fullscreenoptions dictionary's navigationui property is used when calling requestfullscreen() to specify to what extent the user agent should include its standard user interface while the element is presented in full-screen mode.
... syntax let fullscreenoptions = { navigationui: value }; value the value of the navigationui property must be one of the following strings.
... "hide" the browser's navigation interface will be hidden and the entire dimensions of the screen will be allocated to the display of the element.
...And 4 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 4 more matches

IDBVersionChangeRequest.setVersion() - Web APIs
the idbversionchangerequest.setversion method updates the version of the database, returning immediately and running a versionchange transaction on the connected database in a separate thread.
... warning: the latest draft of the specification has dropped this method.
...the new way is to define the version in the idbdatabase.open() method and create and delete object stores in the onupgradeneeded event handler associated with the returned request.
...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.
... this information can then, in turn, be used by the user agent to provide a user interface which displays media playback information to the viewer.
... 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.
...And 4 more matches

PeriodicWave.PeriodicWave() - Web APIs
the periodicwave() constructor of the web audio api creates a new periodicwave object instance.
... syntax var mywave = new periodicwave(context, options); parameters inherits parameters from the audionodeoptions dictionary.
... context a baseaudiocontext representing the audio context you want the node to be associated with.
...And 4 more matches

PublicKeyCredentialCreationOptions.timeout - Web APIs
the timeout property, of the publickeycredentialcreationoptions dictionary, represents an hint, given in milliseconds, for the time the script is willing to wait for the completion of the creation operation.
... this property is optional and merely is a hint which may be overridden by the browser.
... note: an analogous option exists for the fetching operation (navigators.credentials.get()), see publickeycredentialrequestoptions.timeout.
...And 4 more matches

PublicKeyCredentialCreationOptions.user - Web APIs
the user property of the publickeycredentialcreationoptions dictionary is an object describing the user account for which the credentials are generated (via navigator.credentials.create()).
... syntax useraccount = publickeycredentialcreationoptions.user properties displayname a domstring which is human readable and intended for display.
... icon optional an url as a usvstring value which points to an image resource which can be the avatar image for the user.
...And 4 more matches

PublicKeyCredentialRequestOptions.userVerification - Web APIs
userverification is an optional property of the publickeycredentialrequestoptions.
... this is a string which indicates how the user verification should be part of the authentication process.
... note: an analogous option exists for the creation operation (navigators.credentials.create()), see the userverification property of publickeycredentialcreationoptions.authenticatorselection.
...And 4 more matches

RTCPeerConnection: connectionstatechange event - Web APIs
the connectionstatechange event is sent to the ontrack event handler on an rtcpeerconnection object after a new track has been added to an rtcrtpreceiver which is part of the connection.
... the new connection state can be found in connectionstate, and is one of the strings in the rtcpeerconnectionstate enumerated type.
... bubbles no cancelable no interface event event handler onconnectionstatechange examples for an rtcpeerconnection, pc, this example sets up a handler for connectionstatechange messages to handle changes to the connectivity of the webrtc session.
...And 4 more matches

RTCPeerConnection.getIdentityAssertion() - Web APIs
the rtcpeerconnection.getidentityassertion() method initiates the gathering of an identity assertion.
...if the assertion cannot be generated, an idpassertionerror will be sent to the object.
... it is not expected for the application dealing with the rtcpeerconnection: this is automatically done; an explicit call only allows to anticipate the need.
...And 4 more matches

RTCPeerConnection.remoteDescription - Web APIs
the read-only property rtcpeerconnection.remotedescription returns a rtcsessiondescription describing the session (which includes configuration and media information) for the remote end of the connection.
... the returned value typically reflects a remote description which has been received over the signaling server (as either an offer or an answer) and then put into effect by your code calling rtcpeerconnection.setremotedescription() in response.
... syntax var sessiondescription = peerconnection.remotedescription; on a more fundamental level, the returned value is the value of rtcpeerconnection.pendingremotedescription if that property isn't null; otherwise, the value of rtcpeerconnection.currentremotedescription is returned.
...And 4 more matches

ScrollToOptions.behavior - Web APIs
the behavior property of the scrolltooptions dictionary specifies whether the scrolling should animate smoothly, or happen instantly in a single jump.
... this is actually defined on the scrolloptions dictionary, which is implemented by scrolltooptions.
... syntax behavior: scrollbehavior value an enum, the value of which can be one of the following: smooth: the scrolling animates smoothly.
...And 4 more matches

Enabling the behavior - updating the status periodically - Archive of obsolete content
now that we have code to retrieve tinderbox status and update the icon, we need to run it periodically.
... function loadtinderboxstatus() { gxmlhttprequest = new xmlhttprequest(); gxmlhttprequest.onload = updatetinderboxstatus; gxmlhttprequest.open("get", "http://tinderbox.mozilla.org/seamonkey/panel.html"); gxmlhttprequest.send(null); window.settimeout(loadtinderboxstatus, 60000); } window.settimeout(loadtinderboxstatus, 1000); window.settimeout schedules functions to run at some future time.
... we use it inside the loadtinderboxstatus function to make that function run a second (1,000 milliseconds) after startup and a minute (60,000 milliseconds) after each invocation.
...And 3 more matches

Extension Frequently Asked Questions - Archive of obsolete content
this is quick set of answers to the most common issues with extension development.
... they are currently written with mostly firefox in mind, but most if not all should easily translate to seamonkey, thunderbird or any of the other applications.
... for thunderbird, you may also find the extension howto or faq pages helpful.
...And 3 more matches

Abstraction - MDN Web Docs Glossary: Definitions of Web-related terms
abstraction in computer programming is a way to reduce complexity and allow efficient design and implementation in complex software systems.
... advantages of data abstraction helps the user to avoid writing low level code.
... avoids code duplication and increases reusability.
...And 3 more matches

Decryption - MDN Web Docs Glossary: Definitions of Web-related terms
in cryptography, decryption is the conversion of ciphertext into cleartext.
... decryption is a cryptographic primitive: it transforms a ciphertext message into plaintext using a cryptographic algorithm called a cipher.
... like encryption, decryption in modern ciphers is performed using a specific algorithm and a secret, called the key.
...And 3 more matches

Encryption - MDN Web Docs Glossary: Definitions of Web-related terms
in cryptography, encryption is the conversion of cleartext into a coded text or ciphertext.
... encryption is a cryptographic primitive: it transforms a plaintext message into a ciphertext using a cryptographic algorithm called a cipher.
... encryption in modern ciphers is performed using a specific algorithm and a secret, called the key.
...And 3 more matches

AnimationPlaybackEvent.AnimationPlaybackEvent() - Web APIs
the animationplaybackevent() constructor of the web animations api returns a new animationplaybackevent object instance.
... syntax var animationplaybackevent = new animationplaybackevent(type, eventinitdict); parameters type a domstring representing the name of the event.
... eventinitdict optional an optional eventinit dictionary object containing the following fields: bubbles optional defaults to false, of type boolean, indicating if the event bubbles or not.
...And 3 more matches

AudioDestinationNode.maxChannelCount - Web APIs
the maxchannelcount property of the audiodestinationnode interface is an unsigned long defining the maximum amount of channels that the physical device can handle.
... the audionode.channelcount property can be set between 0 and this value (both included).
... if maxchannelcount is 0, like in offlineaudiocontext, the channel count cannot be changed.
...And 3 more matches

CompositionEvent.CompositionEvent() - Web APIs
the compositionevent() constructor creates a new compositionevent object instance.
... syntax const myevent = new compositionevent(typearg [, compositioneventinit]) values typearg is a domstring representing the name of the event.
... compositioneventinit optional a compositioneventinit dictionary object, which can contain the following members: data initializes the data attribute of the compositionevent object to the characters generated by the ime composition.
...And 3 more matches

DeviceMotionEventAcceleration - Web APIs
a devicemotioneventacceleration object provides information about the amount of acceleration the device is experiencing along all three axes.
... properties devicemotioneventacceleration.x read only the amount of acceleration along the x axis.
... devicemotioneventacceleration.y read only the amount of acceleration along the y axis.
...And 3 more matches

Document: animationiteration event - Web APIs
the animationiteration event is fired when an iteration of a css animation ends, and another one begins.
... this event does not occur at the same time as the animationend event, and therefore does not occur for animations with an animation-iteration-count of one.
... bubbles yes cancelable no interface animationevent event handler property onanimationiteration the original target for this event is the element that had the animation applied.
...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

GeolocationPosition.coords - Web APIs
the geolocationposition.coords read-only property returns a geolocationcoordinates object representing a geographic position.
... it contains the location, that is longitude and latitude on the earth, the altitude, and the speed of the object concerned, regrouped inside the returned value.
... it also contains accuracy information about these values.
...And 3 more matches

HTMLElement: animationiteration event - Web APIs
the animationiteration event is fired when an iteration of a css animation ends, and another one begins.
... this event does not occur at the same time as the animationend event, and therefore does not occur for animations with an animation-iteration-count of one.
... bubbles yes cancelable no interface animationevent event handler property onanimationiteration examples this code uses animationiteration to keep track of the number of iterations an animation has completed: const animated = document.queryselector('.animated'); let iterationcount = 0; animated.addeventlistener('animationiteration', () => { iterationcount++; console.log(`animation iteration count: ${iterationcount}`); }); the same, but using the onanimationiteration event handler property: const animated = document.queryselector('.animated'); let iterationcount = 0; animated.onanimationiteration = () => { iterationcount++; console.log(`animation iteration count: ${iterationcount}`); }; live example html <div class="an...
...And 3 more matches

IntersectionObserverEntry.intersectionRect - Web APIs
the intersectionobserverentry interface's read-only intersectionrect property is a domrectreadonly object which describes the smallest rectangle that contains the entire portion of the target element which is currently visible within the intersection root.
... syntax var intersectionrect = intersectionobserverentry.intersectionrect; value a domrectreadonly which describes the part of the target element that's currently visible within the root's intersection rectangle.
... this rectangle is computed by taking the intersection of boundingclientrect with each of the target's ancestors' clip rectangles, with the exception of the intersection root itself.
...And 3 more matches

LinearAccelerationSensor.LinearAccelerationSensor() - Web APIs
the linearaccelerationsensor constructor creates a new linearaccelerationsensor object which provides on each reading the acceleration applied to the device along all three axes, but without the contribution of gravity.
...see feature-policy for implementation instructions.
... syntax var linearaccelerationsensor = new linearaccelerationsensor([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.
...And 3 more matches

MediaSessionActionDetails.fastSeek - Web APIs
the boolean property fastseek in the mediasessionactiondetails dictionary is an optional value which, when specified and true, indicates that the requested seekto operation is part of an ongoing series of seekto operations.
... your handler should take steps to return as quickly as possible by skipping any steps of its operation which are only necessary when the seek operation is complete.
... once fastseek is false or not present, the repeating series of seekto actions is complete and you can finalize the state of your web app or content.
...And 3 more matches

MerchantValidationEvent.validationURL - Web APIs
the merchantvalidationevent property validationurl is a read-only string value providing the url from which to fetch the payment handler-specific data needed to validate the merchant.
... this data should be passed into the complete() method to let the user agent complete the transaction.
... syntax validationurl = merchantvalidationevent.validationurl; value a read-only usvstring giving the url from which to load payment handler specific data needed to complete the merchant verification process.
...And 3 more matches

Notification.actions - Web APIs
the actions read-only property of the notification interface returns the list of notificationaction objects set using the actions option when creating the notification using the notification() constructor.
... this is a list of the application-defined actions the user can choose to take immediately within the context of a notification.
... note: device and user agent might be able to display only a limited number of actions (due to, e.g., limited screen space).
...And 3 more matches

OfflineAudioCompletionEvent.renderedBuffer - Web APIs
the renderedbuffer read-only property of the offlineaudiocompletionevent interface is an audiobuffer containing the result of processing an offlineaudiocontext.
... syntax var buffer = offlineaudiocompletioneventinstance.renderedbuffer; value an audiobuffer.
... specifications specification status comment web audio apithe definition of 'renderedbuffer' in that specification.
...And 3 more matches

PublicKeyCredentialCreationOptions.pubKeyCredParams - Web APIs
the pubkeycredparams property of the publickeycredentialcreationoptions dictionary is an array whose elements are objects describing the desired features of the credential to be created.
... these objects define the type of public-key and the algorithm used for cryptographic signature operations.
... syntax pubkeycredparams = publickeycredentialcreationoptions.pubkeycredparams value an array whose elements are objects with the following properties: type a string describing type of public-key credential to be created.
...And 3 more matches

PushSubscription.expirationTime - Web APIs
the expirationtime read-only property of the pushsubscription interface returns a domhighrestimestamp of the subscription expiration time associated with the push subscription, if there is one, or null otherwise.
... syntax var expirationtime = pushsubscription.expirationtime value a domhighrestimestamp.
... specifications specification status comment push apithe definition of 'expirationtime' in that specification.
...And 3 more matches

RTCPeerConnection.localDescription - Web APIs
the read-only property rtcpeerconnection.localdescription returns an rtcsessiondescription describing the session for the local end of the connection.
... syntax var sessiondescription = peerconnection.localdescription; on a more fundamental level, the returned value is the value of rtcpeerconnection.pendinglocaldescription if that property isn't null; otherwise, the value of rtcpeerconnection.currentlocaldescription is returned.
... see pending and current descriptions in webrtc connectivity for details on this algorithm and why it's used.
...And 3 more matches

RTCPeerConnection: idpvalidationerror event - Web APIs
an idpvalidationerror event informs the target, a rtcpeerconnection object, that the identity provider (idp) encountered an error when trying to validate an identity assertion.
... an event handler for this event can be added via the rtcpeerconnection.onidpvalidationerror property.
... bubbles no cancelable no interface rtcidentityerrorevent event handler property onidpvalidationerror important: this event is no longer used; it was removed from the specification long ago.
...And 3 more matches

RTCSessionDescription.toJSON() - Web APIs
the rtcsessiondescription.tojson() method generates a json description of the object.
... syntax var jsonvalue = sd.tojson(); the result value is a json object containing the following values: "type", containing the value of the rtcsessiondescription.type property and can be one of the following values: "offer", "answer", "pranswer" or null.
... "sdp", containing a domstring, or null, with the sdp message corresponding to rtcsessiondescription.sdp property.
...And 3 more matches

RTCSessionDescriptionCallback - Web APIs
the rtcsessiondescriptioncallback type is used to represent the callback function passed into the deprecated callback-based version of createoffer() or createanswer() when using them to create offers or answers.
... because this function type is part of the legacy webrtc api, you should avoid using it (and the callback-based forms of createoffer() and createanswer() that make use of it).
... syntax rtcsessiondescriptioncallback(description); parameters description an rtcsessiondescriptioninit (or rtcsessiondescription) object describing the session being offered or being accepted.
...And 3 more matches

Window: animationiteration event - Web APIs
the animationiteration event is fired when an iteration of a css animation ends, and another one begins.
... this event does not occur at the same time as the animationend event, and therefore does not occur for animations with an animation-iteration-count of one.
... bubbles yes cancelable no interface animationevent event handler property onanimationiteration the original target for this event is the element that had the animation applied.
...And 3 more matches

XRSessionEvent.session - Web APIs
the read-only xrsessionevent interface's session property indicates which xrsession the event is about.
... syntax xrsession = xrsessionevent.session; value an xrsession object indicating which webxr session the event refers to.
... examples in this example, the session property is used to obtain the session object to manage when an event is received.
...And 3 more matches

ReferenceError: can't access lexical declaration`X' before initialization - JavaScript
the javascript exception "can't access lexical declaration `variable' before initialization" occurs when a lexical variable was accessed before it was initialized.
... this happens within any block statement, when let or const declarations are accessed before they are defined.
... message referenceerror: use before delaration (edge) referenceerror: can't access lexical declaration `x' before initialization (firefox) referenceerror: 'x' is not defined (chrome) error type referenceerror what went wrong?
...And 3 more matches

Specification Deviations - SVG: Scalable Vector Graphics
there are a few places where we have consciously decided to make gecko deviate from or extend the svg specification.
... this page lists those deviations/extensions and our reasoning for them.
... the 'class' and 'style' attributes unlike html and mathml, the svg specification does not specify the 'style' and 'class' attributes on all svg elements.
...And 3 more matches

Conditional - MDN Web Docs Glossary: Definitions of Web-related terms
a condition is a set of rules that can interrupt normal code execution or change it, depending on whether the condition is completed or not.
... an instruction or a set of instructions is executed if a specific condition is fulfilled.
... otherwise, another instruction is executed.
...And 2 more matches

Effective connection type - MDN Web Docs Glossary: Definitions of Web-related terms
effective connection type (ect) refers to the measured network performance, returning a cellular connection type, like 3g, even if the actual connection is tethered broadband or wifi, based on the time between the browser requesting a page and effective type of the connection.
... table of effective connection types ect minimum rtt maximum downlink explanation slow-2g 2000ms 50 kbps the network is suited for small transfers only such as text-only pages.
... 3g 270ms 700 kbps the network is suited for transfers of large assets such as high resolution images, audio, and sd video.
...And 2 more matches

Navigation directive - MDN Web Docs Glossary: Definitions of Web-related terms
csp navigation directives are used in a content-security-policy header and govern to which location a user can navigate to or submit a form to, for example.
... navigation directives don't fall back to the default-src directive.
... list of csp navigation directives form-action restricts the urls which can be used as the target of a form submissions from a given context.
...And 2 more matches

Page prediction - MDN Web Docs Glossary: Definitions of Web-related terms
page prediction is a browser feature or script which, when enabled, tells the browser to download resources the user is likely to visit before the user requests the content.
... page prediction improves performance by enabling almost instant loading of predicted content.
... however, page prediction may also download content a user does not seek.
...And 2 more matches

Signature (functions) - MDN Web Docs Glossary: Definitions of Web-related terms
a function signature (or type signature, or method signature) defines input and output of functions or methods.
... a signature can include: parameters and their types a return value and type exceptions that might be thrown or passed back information about the availability of the method in an object-oriented program (such as the keywords public, static, or prototype).
...a signature in javascript can still give you some information about the method: myobject.prototype.myfunction(value) the method is installed on an object called myobject.
...And 2 more matches

Transmission Control Protocol (TCP) - 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.
... tcp uses virtual ports to create a virtual end-to-end connection that can reuse the physical connections between two computers.
... tcp handshake the tcp three-way handshake, also called the tcp-handshake, three message handshake, and/or syn-syn-ack, is the method used by tcp to set up a tcp/ip connection over an ip-based network.
...And 2 more matches

GetActionDescription
« nsiaccessible page summary this method retrieves the description (localized name) of the accessible action at the given zero-based index.
... astring getactiondescription( in pruint8 aindex ); parameters aindex[in] the zero-based index.
... return value returns the description of the accessible action.
...And 2 more matches

BaseAudioContext.audioWorklet - Web APIs
the audioworklet read-only property of the baseaudiocontext interface returns an instance of audioworklet that can be used for adding audioworkletprocessor-derived classes which implement custom audio processing.
... syntax baseaudiocontextinstance.audioworklet; value an audioworklet instance.
... examples for a complete example demonstrating user-defined audio processing, see the audioworkletnode page.
...And 2 more matches

BaseAudioContext.destination - Web APIs
the destination property of the baseaudiocontext interface returns an audiodestinationnode representing the final destination of all audio in the context.
... it often represents an actual audio-rendering device such as your device's speakers.
... syntax baseaudiocontext.destination; value an audiodestinationnode.
...And 2 more matches

CSSPositionValue.CSSPositionValue() - Web APIs
the csspositionvalue constructor creates a new csspositionvalue object which represents values for properties that take a position, for example object-position.
... syntax cvar csspositionvalue = new csspositionvalue(x, y) parameters x a position along the web page's horizontal axis.
... y a position along the web page's vertical axix.
...And 2 more matches

CSSStyleDeclaration.getPropertyPriority() - Web APIs
the cssstyledeclaration.getpropertypriority() method interface returns a domstring that provides all explicitly set priorities on the css property.
... syntax var priority = style.getpropertypriority(property); parameters property is a domstring representing the property name to be checked.
... return value priority is a domstring that represents the priority (e.g.
...And 2 more matches

DeviceMotionEvent.acceleration - Web APIs
the acceleration property returns the amount of acceleration recorded by the device, in meters per second squared (m/s2).
... note: if the hardware doesn't know how to remove gravity from the acceleration data, this value may not be present in the devicemotionevent.
... in this situation, you'll need to use devicemotionevent.accelerationincludinggravity instead.
...And 2 more matches

DeviceMotionEvent.accelerationIncludingGravity - Web APIs
the accelerationincludinggravity property returns the amount of acceleration recorded by the device, in meters per second squared (m/s2).
... unlike devicemotionevent.acceleration which compensates for the influence of gravity, its value is the sum of the acceleration of the device as induced by the user and the acceleration caused by gravity.
... this value is not typically as useful as devicemotionevent.acceleration, but may be the only value available on devices that aren't able of removing gravity from the acceleration data, such as on devices that don't have a gyroscope.
...And 2 more matches

DeviceMotionEventRotationRate - Web APIs
a devicemotioneventrotationrate object provides information about the rate at which the device is rotating around all three axes.
... properties devicemotioneventrotationrate.alpha read only the amount of rotation around the z axis, in degrees per second.
... devicemotioneventrotationrate.beta read only the amount of rotation around the x axis, in degrees per second.
...And 2 more matches

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.
... the precision is to the millisecond.
... syntax var timestamp = geolocationpositioninstance.timestamp value a domtimestamp object instance.
...And 2 more matches

IDBVersionChangeEvent.version - Web APIs
the version property of the idbversionchangeevent interface returns the new version of the database in a versionchange transaction.
... warning: while this property is still implemented in older browsers, the latest specification replaces it with the oldversion and newversion attributes.
...version; value a 64-bit integer.
...And 2 more matches

Notification.maxActions - Web APIs
the maxactions attribute of the notification interface returns the maximum number of actions supported by the device and the user agent.
... effectively, this is the maximum number of elements in notification.actions array which will be respected by the user agent.
... syntax notification.maxactions value an integer number which indicates the largest number of notification actions that can be presented to the user by the user agent and the device.
...And 2 more matches

NotificationEvent.notification - Web APIs
the notification read-only property of the notificationevent interface returns the instance of the notification that was clicked to fire the event.
... the notification provides read-only access to many properties that were set at the instantiation time of the notification such as tag and data attributes that allow you to store information for defered use in the notificationclick event.
... returns a notification object.
...And 2 more matches

OfflineAudioCompletionEvent - Web APIs
the web audio api offlineaudiocompletionevent interface represents events that occur when the processing of an offlineaudiocontext is terminated.
... note: this interface is marked as deprecated; it is still supported for legacy reasons, but it will soon be superseded when the promise version of offlineaudiocontext.startrendering is supported in browsers, which will no longer need it.
... constructor offlineaudiocompletionevent.offlineaudiocompletionevent creates a new offlineaudiocompletionevent object instance.
...And 2 more matches

OrientationSensor.quaternion - Web APIs
the quaternion read-only property of the orientationsensor interface returns a four element array whose elements contain the components of the unit quaternion representing the device's orientation.
... syntax var quaternion = orientationinstance.quaternion because orientationsensor is a base class, quaternion may only be read from one of its derived classes.
... value a array whose values are the x, y, z, and w components of the quaternion representing the device orientation.
...And 2 more matches

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.
... note that this can result in slower response times or increased power consumption (with a gps chip on a mobile device for example).
...And 2 more matches

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.
...And 2 more matches

PublicKeyCredentialCreationOptions.rp - Web APIs
the rp property of the publickeycredentialcreationoptions dictionary is an object describing the relying party which requested the credential creation (via navigator.credentials.create()).
... syntax relyingpartyobj = publickeycredentialcreationoptions.rp properties icon optional an url as a usvstring value which points to an image resource which can be the logo/icon of the relying party.
...y = { challenge: /* from the server */, rp: { name: "example corp", id : "login.example.com", icon: "https://login.example.com/login.ico" }, user: { id: new uint8array(16), name: "jdoe@example.com", displayname: "john doe" }, pubkeycredparams: [ { type: "public-key", alg: -7 } ] }; navigator.credentials.create({ publickey }) .then(function (newcredentialinfo) { // send attestation response and client extensions // to the server to proceed with the registration // of the credential }).catch(function (err) { console.error(err); }); specifications specification status comment web authentication: an api for accessing public key credentials level 1the definition of 'rp' in that specifi...
...And 2 more matches

RTCPeerConnection: idpassertionerror event - Web APIs
an idpassertionerror event informs the target, a rtcpeerconnection object, that the identity provider (idp) encountered an error when trying to generate an identity assertion.
... an event handler for this event can be added using the rtcpeerconnection.onidpassertionerror property.
... bubbles no cancelable no interface rtcidentityerrorevent event handler property onidpassertionerror warning: this event is no longer used; instead, you can detect an assertion error by detecting when the promise returned by rtcpeerconnection.peeridentity is rejected.
...And 2 more matches

RTCPeerConnection: idpvalidationerror event - Web APIs
an idpvalidationerror event informs the target, a rtcpeerconnection object's onidpvalidationerror event handler, that the identity provider (idp) encountered an error while validating an identity assertion.
... an event handler for this event can be added using the rtcpeerconnection.onidpvalidationerror property.
... bubbles no cancelable no interface rtcidentityerrorevent event handler property onidpvalidationerror warning: this event is no longer used; instead, you can detect a validation error by detecting when the promise returned by rtcpeerconnection.peeridentity is rejected.
...And 2 more matches

RTCPeerConnection.onidpassertionerror - Web APIs
the rtcpeerconnection.onidpassertionerror event handler is a property containing the code to execute whent the idpassertionerror event, of type rtcidentityerrorevent, is received by this rtcpeerconnection.
... such an event is sent when the associated identity provider (idp) encounters an error while generating an identity assertion.
...you should instead detect idp assertion errors by handling rejection of the promise returned by rtcpeerconnection.peeridentity.
...And 2 more matches

RTCPeerConnection.onidpvalidationerror - Web APIs
the rtcpeerconnection.onidpvalidationerror event handler is a property containing the code to execute whent the idpvalidationerror event, of type rtcidentityerrorevent, is received by this rtcpeerconnection.
... such an event is sent when the associated identity provider (idp) encounters an error while validating an identity assertion.
...you should instead detect idp validation errors by watching for the promise returned by rtcpeerconnection.peeridentity to be rejected.
...And 2 more matches

RelativeOrientationSensor.RelativeOrientationSensor() - Web APIs
the relativeorientationsensor constructor creates a new relativeorientationsensor object which describes the device's physical orientation.
...see feature-policy for implementation instructions.
... syntax var relativeorientationsensor = new relativeorientationsensor([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.
...And 2 more matches

SecurityPolicyViolationEvent.sample - Web APIs
the sample read-only property of the securitypolicyviolationevent interface is a domstring representing a sample of the resource that caused the violation.
... syntax let sample = violationeventinstance.sample; value a domstring containing a sample of the resource that caused the violation, usually the first 40 characters.
... this will only be populated if the resource is an inline script, event handler, or style — external resources causing a violation will not generate a sample.
...And 2 more matches

USBConfiguration.USBConfiguration() - Web APIs
the usbconfiguration() constructor creates a new usbconfiguration object which contains information about the configuration on the provided usbdevice with the given configuration value.
... syntax var usbconfiguration = new usbconfiguration(device, configurationvalue) parameters device specifies the usbdevice you want to configure.
... configurationvalue specifies the configuration descriptor you want to read.
...And 2 more matches

USBConfiguration.configurationName - Web APIs
the configurationname read-only property of the usbconfiguration interface returns the name provided by the device to describe this configuration.
... this is equal to the value of the string descriptor with the index provided in the iconfiguration field of the configuration descriptor defining this configuration.
... syntax var name = usbconfiguration.configurationname value the name provided by the device to describe this configuration.
...And 2 more matches

<xsl:processing-instruction> - XSLT: Extensible Stylesheet Language Transformations
xslt/xpath reference: xslt elements, exslt functions, xpath functions, xpath axes the <xsl:processing-instruction> element writes a processing instruction to the output document.
... syntax <xsl:processing-instruction name=name> template </xsl:processing-instruction> required attributes name specifies the name of this processing instruction.
... optional attributes none.
...And 2 more matches

Using the Mozilla JavaScript interface to XSL Transformations - XSLT: Extensible Stylesheet Language Transformations
var testtransform = document.implementation.createdocument("", "test", null); // just an example to get a transform into a script as a dom // xmldocument.load is asynchronous, so all processing happens in the // onload handler testtransform.addeventlistener("load", onload, false); testtransform.load("test-transform.xml"); function onload() { processor.importstylesheet(testtransform); } xsltprocessor.importstylesheet() requires one arg...
... transformtodocument xsltprocessor.transformtodocument() takes one argument, the source node to transform, and returns a new document with the results of the transformation: var newdocument = processor.transformtodocument(domtobetransformed); the resultant object depends on the output method of the stylesheet: html - htmldocument xml - xmldocument text - xmldocument with a single root element <transformiix:result> with the text as a child transformtofragment you can also use xsltprocessor.transformtofragment() which will return a documentfragment node.
... var ownerdocument = document.implementation.createdocument("", "test", null); var newfragment = processor.transformtofragment(domtobetransformed, ownerdocument); xsltprocessor.transformtofragment() will only produce html dom objects if the owner document is itself an htmldocument, or if the output method of the stylesheet is html.
...And 2 more matches

Callback function - MDN Web Docs Glossary: Definitions of Web-related terms
a callback function is a function passed into another function as an argument, which is then invoked inside the outer function to complete some kind of routine or action.
... here is a quick example: function greeting(name) { alert('hello ' + name); } function processuserinput(callback) { var name = prompt('please enter your name.'); callback(name); } processuserinput(greeting); the above example is a synchronous callback, as it is executed immediately.
... note, however, that callbacks are often used to continue code execution after an asynchronous operation has completed — these are called asynchronous callbacks.
... a good example is the callback functions executed inside a .then() block chained onto the end of a promise after that promise fulfills or rejects.

Garbage collection - MDN Web Docs Glossary: Definitions of Web-related terms
garbage collection is a term used in computer programming to describe the process of finding and deleting objects which are no longer being referenced by other objects.
... in other words, garbage collection is the process of removing any objects which are not being used by any other objects.
... often abbreviated "gc," garbage collection is a fundamental component of the memory management system used by javascript.
... learn more general knowledge memory management on wikipedia garbage collection on wikipedia technical reference garbage collection in the mdn javascript guide.

Quaternion - MDN Web Docs Glossary: Definitions of Web-related terms
a quaternion is the quotient of two 3d vectors and is used in 3d graphics and in accelerometer-based sensors to represent orientation or rotational data.
... while mathematical quaternions are more involved than this, the unit quaternions (or rotational quaternions) used to represent rotation while using webgl or webxr, for example, are represented using the same syntax as a 3d point.
... as such, the type dompoint (or dompointreadonly) is used to store quaternions.
... learn more general knowledge quaternions and spatial rotation on wikipedia quaternion on wikipedia related xrrigidtransform.orientation in the webxr device api reference ...

Recursion - MDN Web Docs Glossary: Definitions of Web-related terms
the act of a function calling itself, recursion is used to solve problems that contain smaller sub-problems.
... a recursive function can receive two inputs: a base case (ends recursion) or a recursive case (resumes recursion).
... examples recursive function calls itself until condition met the following python code defines a function that takes a number, prints it, and then calls itself again with the number's value -1.
... def recurse(x): if x > 0: print(x) recurse(x - 1) recurse(10) the output will look like this: 10 9 8 7 6 5 4 3 2 1 0 learn more general knowledge recursion (computer science) on wikipedia more details about recursion in javascript ...

Regular expression - MDN Web Docs Glossary: Definitions of Web-related terms
regular expressions (or regex) are rules that govern which sequences of characters come up in a search.
... regular expressions are implemented in various languages, but the best-known implementation is the perl implementation, which has given rise to its own ecosystem of implementations called pcre (perl compatible regular expression).
... on the web, javascript provides another regex implementation through the regexp object.
... learn more general knowledge regular expressions on wikipedia interactive tutorial visualized regular expression technical reference writing regular expressions in javascript ...

Application Context - MDN Web Docs Glossary: Definitions of Web-related terms
an application context is a top-level browsing context that has a manifest applied to it.
... if an application context is created as a result of the user agent being asked to navigate to a deep link, the user agent must immediately navigate to the deep link with replacement enabled.
... otherwise, when the application context is created, the user agent must immediately navigate to the start url with replacement enabled.
... please note that the start url is not necessarily the value of the start_url member: the user or user agent could have changed it when the application was added to home-screen or otherwise bookmarked.

minification - MDN Web Docs Glossary: Definitions of Web-related terms
minification is the process of removing unnecessary or redundant data without affecting how a resource is processed by the browser.
... minification can include the removal of code comments, white space, and unused code, as well as the shortening of variable and function names.
... minification is used to improve web performance by reducing file size.
... as minification makes code less legible to humans, developer tools have 'prettification' features that can add white space back into the code to make it a bit more legible.

JS_CompileUCFunctionForPrincipalsVersion
this article covers features introduced in spidermonkey 1.8.5 please provide a description for this function.
... syntax jsfunction * js_compileucfunctionforprincipalsversion(jscontext *cx, jsobject *obj, jsprincipals *principals, const char *name, unsigned int nargs, const char **argnames, const jschar *chars, size_t length, const char *filename, unsigned int lineno, jsversion version); name type description cx jscontext * the context.
... obj jsobject * principals jsprincipals * name const char * nargs unsigned int argnames const char ** chars const jschar * length size_t filename const char * lineno unsigned int version jsversion description please provide a description.
... see also please provide a description.

nsIDOMGeoPositionOptions
the nsidomgeopositionoptions interface is used to specify options for geolocation operations.
... dom/interfaces/geolocation/nsidomgeopositionoptions.idlscriptable please add a summary to this article.
... last changed in gecko 1.9.1 (firefox 3.5 / thunderbird 3.0 / seamonkey 2.0) inherits from: nsisupports attributes attribute type description enablehighaccuracy boolean if true, high accuracy mode is used.
... timeout unsigned long maximum time in milliseconds before giving up on an attempt to retrieve location information.

Animation inspector example: Web Animations API - Firefox Developer Tools
firefox-logo-animation example animation using the web animations api.
... html content <div class="channel"> <img src="https://udn.realityripple.com/samples/e6/a96484b5c3.png" id="icon"/> <span id="note">firefox developer edition</span> </div> css content .channel { padding: 2em; margin: 0.5em; box-shadow: 1px 1px 5px #808080; margin: 1.5em; } .channel > * { vertical-align: middle; line-height: normal; } #icon { width: 50px; height: 50px; filter: grayscale(100%); } #note { margin-left: 1em; font: 1.5em "open sans",arial,sans-serif; overflow: hidden; white-space: nowrap; display: inline-block; opacity: 0; width: 0; } javascript content var iconkeyframeset = [ { transform: 'scale(1)', filter: 'grayscale(100%)'}, { filter: 'grayscale(100%)', offset: 0.333}, { transform: 'scale(1.5)', offset: 0.666 }, { transfo...
...rm: 'scale(1.5)', filter: 'grayscale(0%)'} ]; var notekeyframeset = [ { opacity: '0', width: '0'}, { opacity: '1', width: '300px'} ]; var iconkeyframeoptions = { duration: 750, fill: 'forwards', easing: 'ease-in', enddelay: 100 } var notekeyframeoptions = { duration: 500, fill: 'forwards', easing: 'ease-out', delay: 150 } var icon = document.getelementbyid("icon"); var note = document.getelementbyid("note"); var iconanimation = icon.animate(iconkeyframeset, iconkeyframeoptions); var noteanimation = note.animate(notekeyframeset, notekeyframeoptions); iconanimation.pause(); noteanimation.pause(); var firsttime = true; function animatechannel(e) { if (e.button != 0) { return; } if (e.target.id != "icon") { return; } if (firsttime) { iconanimatio...
...n.play(); noteanimation.play(); firsttime = false; } else { iconanimation.reverse(); noteanimation.reverse(); } } document.addeventlistener("click", animatechannel); ...

AudioBuffer.duration - Web APIs
the duration property of the audiobuffer interface returns a double representing the duration, in seconds, of the pcm data stored in the buffer.
... syntax var myarraybuffer = audioctx.createbuffer(2, framecount, audioctx.samplerate); myarraybuffer.duration; value a double.
... example // stereo var channels = 2; // create an empty two second stereo buffer at the // sample rate of the audiocontext var framecount = audioctx.samplerate * 2.0; var myarraybuffer = audioctx.createbuffer(2, framecount, audioctx.samplerate); button.onclick = function() { // fill the buffer with white noise; // just random values between -1.0 and 1.0 for (var channel = 0; channel < channels; channel++) { // this gives us the actual arraybuffer that contains the data var nowbuffering = myarraybuffer.getchanneldata(channel); for (var i = 0; i < framecount; i++) { // math.random() is in [0; 1.0] // audio needs to be in [-1.0; 1.0] nowbuffering[i] = math.random() * 2 - 1; } } console.log(myarraybuffer.duration); } specification spec...
...ification status comment web audio apithe definition of 'duration' in that specification.

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.
... obsolete initial definition.

DeviceMotionEventRotationRate: alpha - Web APIs
this property indicates the rate of rotation around the z axis -- in degrees per second -- in a devicemotioneventrotationrate object.
... syntax var alpha = devicerotationrate.alpha; this property is read-only.
... return value alpha a double indicating the rate of rotation around the z axis, in degrees per second.
... specifications specification status comment deviceorientation event specificationthe definition of 'devicemotioneventrotationrate: alpha' in that specification.

DeviceMotionEventRotationRate: beta - Web APIs
this property indicates the rate of rotation around the x axis -- in degrees per second -- in a devicemotioneventrotationrate object.
... syntax var beta = devicerotationrate.beta; this property is read-only.
... return value beta a double indicating the rate of rotation around the x axis, in degrees per second.
... specifications specification status comment deviceorientation event specificationthe definition of 'devicemotioneventrotationrate: beta' in that specification.

DeviceMotionEventRotationRate: gamma - Web APIs
this property indicates the rate of rotation around the y axis -- in degrees per second -- in a devicemotioneventrotationrate object.
... syntax var gamma = devicerotationrate.gamma; this property is read-only.
... return value gamma a double indicating the rate of rotation around the y axis, in degrees per second.
... specifications specification status comment deviceorientation event specificationthe definition of 'devicemotioneventrotationrate: gamma' 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.
... recommendation initial definition ...

MediaSessionActionDetails.seekOffset - Web APIs
the mediasessionactiondetails dictionary's seekoffset property is an optional value passed into the action handler callback to provide the number of seconds the seekforward and seekbackward actions should move the playback time by.
... syntax let mediasessionactiondetails = { seekoffset: deltatimeinseconds }; let deltatime = mediasessionactiondetails.seekoffset; value a floating-point value indicating the time delta in seconds by which to move the playback position relative to its current timestamp.
... specifications specification status comment media session standardthe definition of 'mediasessionactiondetails.seekoffset' in that specification.
... draft initial definition.

MediaStreamAudioDestinationNode.stream - Web APIs
the stream property of the audiocontext interface represents a mediastream containing a single audiomediastreamtrack with the same number of channels as the node itself.
... you can use this property to get a stream out of the audio graph and feed it into another construct, such as a media recorder.
... syntax var audioctx = new audiocontext(); var destination = audioctx.createmediastreamdestination(); var mystream = destination.stream; value a mediastream.
... example specifications specification status comment web audio apithe definition of 'stream' in that specification.

MediaStreamAudioSourceOptions - Web APIs
the mediastreamaudiosourceoptions dictionary provides configuration options used when creating a mediastreamaudiosourcenode using its constructor.
... it is not needed when using the audiocontext.createmediastreamsource() method.
... properties mediastream a required property which specifies the mediastream from which to obtain audio for the node.
... specifications specification status comment web audio apithe definition of 'mediastreamaudiosourceoptions' 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.

MediaStreamTrackAudioSourceOptions - Web APIs
the mediastreamtrackaudiosourceoptions dictionary is used when specifying options to the mediastreamtrackaudiosourcenode() constructor.
... it isn't needed when using the audiocontext.createmediastreamtracksource() method.
... properties mediastreamtrack the mediastreamtrack from which to take audio data for this node's output.
... specifications specification status comment web audio apithe definition of 'mediastreamtrackaudiosourceoptions' in that specification.

Notification.requireInteraction - Web APIs
the requireinteraction read-only property of the notification interface returns a boolean indicating that a notification should remain active until the user clicks or dismisses it, rather than closing automatically.
... note: this can be set when the notification is first created by setting the requireinteraction option to true in the options object of the notification.notification() constructor.
... syntax function spawnnotification(thetitle,thebody,shouldrequireinteraction) { var options = { body: thebody, requireinteraction: shouldrequireinteraction } var n = new notification(thetitle,options); } value a boolean.
... specifications specification status comment notifications apithe definition of 'requireinteraction' in that specification.

NotificationEvent.NotificationEvent() - Web APIs
the notificationevent() constructor creates a new notificationevent object.
... syntax var mynotificationevent = new notificationevent(type, notificationeventinit); parameters type tbd notificationeventinit optional a dictionary object containing a notification object to be used as the notification the event is dispatched on.
... in later drafts of the specification, this parameter is not optional.
... example var n = new notification('hello'); var init = { notification: n }; var mynotificationevent = new notificationevent(type, init); specifications specification status comment notifications apithe definition of 'notificationevent() constructor' in that specification.

NotificationEvent.action - Web APIs
returns the string id of the notification button the user clicked.
... this value returns an empty string if the user clicked the notification somewhere other than an action button, or the notification does not have a button.
... the notification id is set during the creation of the notification via the actions array attribute and can't be modified unless the notification is replaced.
... example self.registration.shownotification("new articles available", { actions: [{action: "get", title: "get now."}] }); self.addeventlistener('notificationclick', function(event) { event.notification.close(); if (event.action === 'get') { synchronizereader(); } else { clients.openwindow("/reader"); } }, false); specifications specification status comment notifications apithe definition of 'action' 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.
... recommendation initial definition ...

PushSubscription.subscriptionId - Web APIs
the endpoint read-only property of the pushsubscription interface returns a domstring containing the subscription id associated with the push subscription.
... syntax var subid = pushsubscription.subscriptionid; specifications specification status comment push api working draft initial definition browser compatibility the compatibility table on this page is generated from structured data.
... desktopmobilechromeedgefirefoxinternet exploreroperasafariandroid webviewchrome for androidfirefox for androidopera for androidsafari on iossamsung internetsubscriptionidchrome full support 42edge full support ≤18firefox no support noie no support noopera full support 29safari no support nowebview android no support nochrome android ful...
...l support 42firefox android no support noopera android full support 29safari ios no support nosamsung internet android full support 4.0legend full support full support no support no support ...

RTCOfferAnswerOptions.voiceActivityDetection - Web APIs
the voiceactivitydetection property of the rtcofferansweroptions dictionary is used to specify whether or not to use automatic voice detection for the audio on an rtcpeerconnection.
... the default value, true, indicates that voice detection should be used and that if possible, the user agent should automatically disable or mute outgoing audio when the audio source is not sensing a human voice.
... syntax var options = { voiceactivitydetection: trueorfalse }; value a boolean value indicating whether or not the connection should use voice detection once running.
... the default value, true, indicates that the user agent should monitor the audio coming from the microphone or other audio source and automatically cease transmitting data or mute when the user isn't speaking into the microphone, a value of false indicates that the audio should continue to be transmitted regardless of whether or not speech is detected.

SecurityPolicyViolationEvent.blockedURI - Web APIs
the blockeduri read-only property of the securitypolicyviolationevent interface is a usvstring representing the uri of the resource that was blocked because it violates a policy.
... syntax let blockeduri = violationeventinstance.blockeduri; value a usvstring representing the uri of the blocked resource.
... example document.addeventlistener("securitypolicyviolation", (e) => { console.log(e.blockeduri); }); specifications specification status comment content security policy level 3the definition of 'blockeduri' in that specification.
... working draft initial definition ...

SecurityPolicyViolationEvent.columnNumber - Web APIs
the columnnumber read-only property of the securitypolicyviolationevent interface is the column number in the document or worker at which the violation occurred.
... syntax let colnum = violationeventinstance.columnnumber; value a number representing the column number where the violation occurred.
... example document.addeventlistener("securitypolicyviolation", (e) => { console.log(e.columnnumber); }); specifications specification status comment content security policy level 3the definition of 'columnnumber' in that specification.
... working draft initial definition ...

SecurityPolicyViolationEvent.documentURI - Web APIs
the documenturi read-only property of the securitypolicyviolationevent interface is a usvstring representing the uri of the document or worker in which the violation was found.
... syntax let documenturi = violationeventinstance.documenturi; value a usvstring representing the uri of the document or worker in which the violation was found.
... example document.addeventlistener("securitypolicyviolation", (e) => { console.log(e.documenturi); }); specifications specification status comment content security policy level 3the definition of 'documenturi' in that specification.
... working draft initial definition ...

SecurityPolicyViolationEvent.effectiveDirective - Web APIs
the effectivedirective read-only property of the securitypolicyviolationevent interface is a domstring representing the directive whose enforcement uncovered the violation.
... syntax let effdir = violationeventinstance.effectivedirective; value a domstring representing the directive whose enforcement uncovered the violation.
... example document.addeventlistener("securitypolicyviolation", (e) => { console.log(e.effectivedirective); }); specifications specification status comment content security policy level 3the definition of 'effectivedirective' in that specification.
... working draft initial definition ...

SecurityPolicyViolationEvent.lineNumber - Web APIs
the linenumber read-only property of the securitypolicyviolationevent interface is the line number in the document or worker at which the violation occurred.
... syntax let linenumber = violationeventinstance.linenumber; value a number representing the line number at which the violation occurred.
... example document.addeventlistener("securitypolicyviolation", (e) => { console.log(e.linenumber); }); specifications specification status comment content security policy level 3the definition of 'linenumber' in that specification.
... working draft initial definition ...

SecurityPolicyViolationEvent.originalPolicy - Web APIs
the originalpolicy read-only property of the securitypolicyviolationevent interface is a domstring containing the policy whose enforcement uncovered the violation.
... syntax let origpolicy = violationeventinstance.originalpolicy; value a domstring representing the policy whose enforcement uncovered the violation.
... example document.addeventlistener("securitypolicyviolation", (e) => { console.log(e.originalpolicy); }); specifications specification status comment content security policy level 3the definition of 'originalpolicy' in that specification.
... working draft initial definition ...

SecurityPolicyViolationEvent.referrer - Web APIs
the referrer read-only property of the securitypolicyviolationevent interface is a usvstring representing the referrer of the resources whose policy was violated.
... syntax let referrer = violationeventinstance.referrer; value a usvstring representing the url of the referrer of the violating resources.
... example document.addeventlistener("securitypolicyviolation", (e) => { console.log(e.referrer); }); specifications specification status comment content security policy level 3the definition of 'referrer' in that specification.
... working draft initial definition ...

SecurityPolicyViolationEvent.sourceFile - Web APIs
the sourcefile read-only property of the securitypolicyviolationevent interface is a usvstring representing the uri of the document or worker in which the violation was found.
... syntax let source = violationeventinstance.sourcefile; value a usvstring representing the uri of the document or worker in which the violation was found.
... example document.addeventlistener("securitypolicyviolation", (e) => { console.log(e.sourcefile); }); specifications specification status comment content security policy level 3the definition of 'sourcefile' in that specification.
... working draft initial definition ...

SecurityPolicyViolationEvent.statusCode - Web APIs
the statuscode read-only property of the securitypolicyviolationevent interface is a number representing the http status code of the document or worker in which the violation occurred.
... syntax let status = violationeventinstance.statuscode; value a number representing the status code of the document or worker in which the violation occurred.
... example document.addeventlistener("securitypolicyviolation", (e) => { console.log(e.statuscode); }); specifications specification status comment content security policy level 3the definition of 'statuscode' in that specification.
... working draft initial definition ...

ServiceWorkerRegistration.periodicSync - Web APIs
note: this feature was mentioned as an idea in the sw explainer at some point, but as yet has not been implemented anywhere.
... the periodicsync read-only property of the serviceworkerregistration interface returns a reference to the periodicsyncmanager interface, which manages periodic background synchronization processes.
... syntax var periodicsyncmanager = serviceworkerregistration.periodicsync; value a periodicsyncmanager object.
... examples // tbd specifications currently not part of any specification.

SpeechRecognitionEvent.interpretation - Web APIs
the interpretation read-only property of the speechrecognitionevent interface returns the semantic meaning of what the user said.
... this might be determined, for instance, through the sisr specification of semantics in a grammar (see semantic interpretation for speech recognition (sisr) version 1.0 for specification and examples.) syntax var myinterpretation = event.interpretation; value the returned value can be of any type.
... if no semantic interpretation has been returned by the speec recognition system, null will be returned.
... examples recognition.onresult = function(event) { var color = event.results[0][0].transcript; diagnostic.textcontent = 'result received: ' + color + '.'; bg.style.backgroundcolor = color; console.log(event.interpretation); } ...

XRSessionEventInit.session - Web APIs
the xrsessioneventinit dictionary's session property specifies the xrsession for which the event describes a state change.
... syntax let sessioneventinit = { session: xrsession }; mysessionevent = new xrsessionevent(type, sessioneventinit); mysessionevent = new xrsessionevent(type, { session: xrsession }); value an xrsession object indicating which webxr session the event is referring to.
... specifications specification status comment webxr device apithe definition of 'xrsessioneventinit.session' in that specification.
... working draft initial definition.

Cryptographic hash function - MDN Web Docs Glossary: Definitions of Web-related terms
a cryptographic hash function, also sometimes called a digest function, is a cryptographic primitive transforming a message of arbitrary size into a message of fixed size, called a digest.
... cryptographic hash functions are used for authentication, digital signatures, and message authentication codes.
... to be used for cryptography, a hash function must have these qualities: quick to compute (because they are generated frequently) not invertible (each digest could come from a very large number of messages, and only brute-force can generate a message that leads to a given digest) tamper-resistant (any change to a message leads to a different digest) collision-resistant (it should be impossible to find two different messages that produce the same digest) cryptographic hash functions such as md5 and sha-1 are considered broken, as attacks have been found that significantly reduce their collision resistance.

Encapsulation - MDN Web Docs Glossary: Definitions of Web-related terms
encapsulation is the packing of data and functions into one component (for example, a class) and then controlling access to that component to make a "blackbox" out of the object.
... because of this, a user of that class only needs to know its interface (that is, the data and functions exposed outside the class), not the hidden implementation.
... learn more general knowledge encapsulation on wikipedia ...

Exception - MDN Web Docs Glossary: Definitions of Web-related terms
an exception is a condition that interrupts normal code execution.
... in javascript syntax errors are a very common source of exceptions.
... learn more general knowledge exception handling on wikipedia ...

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.
...progressive enhancement is related but different — often seen as going in the opposite direction to graceful degredation.

Localization - MDN Web Docs Glossary: Definitions of Web-related terms
localization (l10n) is the process of adapting a software user interface to a specific culture.
... the following are common factors to consider: language unit of measure (e.g., kilometers in europe, miles in u.s.) text direction (e.g., european languages are left-to-right, arabic right-to-left) capitalization in latin script (e.g., english uses capitals for weekdays, spanish uses lowercase) adaptation of idioms (e.g., "raining cats and dogs" makes no sense when translated literally) use of register (e.g., in japanese respectful speech differs exceptionally from casual speech) number format (e.g., 10 000,00 in germany vs.
... 10,000.00 in the u.s.) date format currency cultural references paper size color psychology compliance with local laws local holidays personal names learn more general knowledge localization at mozilla on mdn localization on wikipedia ...

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.

Self-Executing Anonymous Function - MDN Web Docs Glossary: Definitions of Web-related terms
a javascript function that runs as soon as it is defined.
... also known as an iife (immediately invoked function expression).
... see the iife glossary page linked above for more information.

Serialization - MDN Web Docs Glossary: Definitions of Web-related terms
in javascript, for example, you can serialize an object to a json string by calling the function json.stringify().
... css values are serialized by calling the function cssstyledeclaration.getpropertyvalue().
... learn more general knowledge serialization on wikipedia ...

Specification - MDN Web Docs Glossary: Definitions of Web-related terms
a specification is a document that lays out in detail what functionality or attributes a product must include before delivery.
... in the context of describing the web, the term "specification" (often shortened to simply "spec") generally means a document describing a language, technology, or api which makes up the complete set of open web technologies.
... learn more general knowledge specification on wikipedia technical reference open web platform specifications ...

Type conversion - MDN Web Docs Glossary: Definitions of Web-related terms
type conversion (or typecasting) means transfer of data from one data type to another.
... implicit conversion happens when the compiler automatically assigns data types, but the source code can also explicitly require a conversion to take place.
... for example, given the instruction 5+2.0, the floating point 2.0 is implicitly typecasted into an integer, but given the instruction number("0x11"), the string "0x11" is explicitly typecasted as the number 17.

Challenge-response authentication - MDN Web Docs Glossary: Definitions of Web-related terms
challenge-response protocols are one way to fight against replay attacks where an attacker listens to the previous messages and resends them at a later time to get the same credentials as the original message.
... the http authentication protocol is challenge-response based, though the "basic" protocol isn't using a real challenge (the realm is always the same).
... learn more challenge-response authentication on wikipedia.

Information for Governments and Other Organizations Evaluating Mozilla
mozilla's section 508 compliance section 508 is a set of accessibility requirements that help us federal agencies decide what software applications they can use.
... mozilla's w3c user agent guidelines evaluation report w3c's wai is advancing another important set of accessibility standards called uaag.
... these guidelines go much further than section 508 does and mozilla is further from doing a good job at satisfying them.

Firefox Operational Information Database: SQLite
a large amount of operational information about websites visited and browser configuration is stored in relational databases in sqlite used by firefox.
... the sqlite manager add-on allows convenient browsing of this information.
... in the manager, select the database you want to explore in the '(select profile database)' pulldown, click 'go', select one of the tables listed in the left column and see the current contents of the database in the 'browse & search' tab.) some databases are used by the browser itself, others are used by applications that you have installed or used; for example: content-prefs.sqlite cookies.sqlite download.sqlite formhistory.sqlite persmissions.sqlite places.sqlite search.sqlite signons.sqlite webappstore.sqlite ...

JS_GetImplementationVersion
get the version number of the js engine.
... syntax const char * js_getimplementationversion(void); description js_getimplementationversion returns a hard-coded, english language string that specifies the version number of the js engine currently in use, and its release date.
... see also mxr id search for js_getimplementationversion js_getversion js_setversionforcompartment ...

Animation inspector example: CSS transitions - Firefox Developer Tools
firefox-logo-animation example animation using css transitions.
... html content <div class="channel"> <img src="https://udn.realityripple.com/samples/e6/a96484b5c3.png" class="icon"/> <span class="note">firefox developer edition</span> </div> css content .channel { padding: 2em; margin: 0.5em; box-shadow: 1px 1px 5px #808080; margin: 1.5em; } .channel > * { vertical-align: middle; line-height: normal; } .icon { width: 50px; height: 50px; filter: grayscale(100%); transition: transform 750ms ease-in, filter 750ms ease-in-out; } .note { margin-left: 1em; font: 1.5em "open sans",arial,sans-serif; overflow: hidden; white-space: nowrap; display: inline-block; opacity: 0; width: 0; transition: opacity 500ms 150ms, width 500ms 150ms; } .icon#selected { filter: grayscale(0%); transform: scale(1.5); } .icon#selec...
...ted+span { opacity: 1; width: 300px; } javascript content function toggleselection(e) { if (e.button != 0) { return; } if (e.target.classlist.contains("icon")) { var wasselected = (e.target.getattribute("id") == "selected"); clearselection(); if (!wasselected) { e.target.setattribute("id", "selected"); } } } function clearselection() { var selected = document.getelementbyid("selected"); if (selected) { selected.removeattribute("id"); } } document.addeventlistener("click", toggleselection); ...

AnimationEvent.animationName - Web APIs
the animationevent.animationname read-only property is a domstring containing the value of the animation-name css property associated with the transition.
... syntax name = animationevent.animationname specifications specification status comment css animationsthe definition of 'animationevent.animationname' in that specification.
... working draft initial definition.

DeviceMotionEvent.rotationRate - Web APIs
note: if the hardware isn't capable of providing this information, this property returns null.
... syntax var rotationrate = devicemotionevent.rotationrate; value the rotationrate property is a read only object describing the rotation rates of the device around each of its axes: alpha the rate at which the device is rotating about its z axis; that is, being twisted about a line perpendicular to the screen.
... specifications specification status comment deviceorientation event specification editor's draft initial definition.

DeviceMotionEventAcceleration: x - Web APIs
summary this read-only property indicates the amount of acceleration that occurred along the x axis in a devicemotioneventacceleration object.
... syntax var xaccel = devicemotioneventacceleration.x; return value x a double indicating the amount of acceleration along the x axis.
... specifications specification status comment deviceorientation event specificationthe definition of 'devicemotioneventacceleration: x' in that specification.

DeviceMotionEventAcceleration: y - Web APIs
summary this read-only property indicates the amount of acceleration that occurred along the y axis in a devicemotioneventacceleration object.
... syntax var yaccel = devicemotioneventacceleration.y; return value y a double indicating the amount of acceleration along the y axis.
... specifications specification status comment deviceorientation event specificationthe definition of 'devicemotioneventacceleration: y' in that specification.

DeviceMotionEventAcceleration: z - Web APIs
summary this read-only property indicates the amount of acceleration that occurred along the z axis in a devicemotioneventacceleration object.
... syntax var zaccel = devicemotioneventacceleration.z; return value z a double indicating the amount of acceleration along the z axis.
... specifications specification status comment deviceorientation event specificationthe definition of 'devicemotioneventacceleration: z' 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.

RTCSessionDescription.sdp - Web APIs
the property rtcsessiondescription.sdp is a read-only domstring containing the sdp which describes the session.
... syntax var value = sessiondescription.sdp; sessiondescription.sdp = value; value the value is a domstring containing an sdp message like this one: v=0 o=alice 2890844526 2890844526 in ip4 host.anywhere.com s= c=in ip4 host.anywhere.com t=0 0 m=audio 49170 rtp/avp 0 a=rtpmap:0 pcmu/8000 m=video 51372 rtp/avp 31 a=rtpmap:31 h261/90000 m=video 53000 rtp/avp 32 a=rtpmap:32 mpv/90000 example // the remote description has been set previously on pc, an rtcpeerconnection alert(pc.remotedescription.sdp); specifications specification status comment webrtc 1.0: real-time communication between browsersthe definition of 'rtcsessiondescription.sdp' in that specification.
... candidate recommendation initial specification.

TransitionEvent.transitionName - Web APIs
the transitionevent.transitionname read-only property is a domstring containing the name of the css property associated with the transition.
... syntax name = transitionevent.transitionname specifications specification status comment css transitionsthe definition of 'transitionevent.transitionname' in that specification.
... working draft initial definition.

USBConfiguration.configurationValue - Web APIs
the configurationvalue read-only property of the usbconfiguration interface null syntax var value = usbconfiguration.configurationvalue value the configuration descriptor of the usbdevice specified in the constructor of the current usbconfiguration instance.
... specifications specification status comment unknownthe definition of 'configurationvalue' in that specification.
... unknown initial definition.

WebGLShaderPrecisionFormat.precision - Web APIs
the read-only webglshaderprecisionformat.precision property returns the number of bits of precision that can be represented.
... examples var canvas = document.getelementbyid('canvas'); var gl = canvas.getcontext('webgl'); gl.getshaderprecisionformat(gl.vertex_shader, gl.medium_float).precision; // 23 gl.getshaderprecisionformat(gl.fragment_shader, gl.low_int).precision; // 0 specifications specification status comment webgl 1.0the definition of 'webglshaderprecisionformat.precision' in that specification.
... recommendation initial definition.

Introduction - XSLT: Extensible Stylesheet Language Transformations
introduction with modern browsers supporting xslt, developers can now use javascript to access the power that xslt provides.
... javascript can enable a web application to load xml data, process it via xslt into a presentable form and then add it into an existing document.
... since the xml data loaded only contains the raw information without any presentation data, it can load quickly even on dialup.

Deserialization - MDN Web Docs Glossary: Definitions of Web-related terms
in javascript, for example, you can deserialize a json string to an object by calling the function json.parse().
... learn more general knowledge serialization on wikipedia ...

Gzip compression - MDN Web Docs Glossary: Definitions of Web-related terms
gzip is a file format used for file compression and decompression.
... learn more how to enable compression and gzip for page speed.

Information architecture - MDN Web Docs Glossary: Definitions of Web-related terms
information architecture, as applied to web design and development, is the practice of organizing the information / content / functionality of a web site so that it presents the best user experience it can, with information and services being easily usable and findable.
... learn more general knowledge information architecture on wikipedia ...

SPA (Single-page application) - MDN Web Docs Glossary: Definitions of Web-related terms
an spa (single-page application) is a web app implemention that loads only a single web document, and then updates the body content of that single document via javascript apis such as xmlhttprequest and fetch when different content is to be shown.
... this therefore allows users to use websites without loading whole new pages from the server, which can result in performance gains and a more dynamic experience, with some tradeoff disadvantages such as seo, more effort required to maintain state, implement navigation, and do meaningful performance monitoring.

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.

Type coercion - MDN Web Docs Glossary: Definitions of Web-related terms
type coercion is the automatic or implicit conversion of values from one data type to another (such as strings to numbers).
... type conversion is similar to type coercion because they both convert values from one data type to another with one key difference — type coercion is implicit whereas type conversion can be either implicit or explicit.

WebExtensions - MDN Web Docs Glossary: Definitions of Web-related terms
webextensions is a cross-browser system for developing browser extensions in firefox.
... learn more technical reference browser extensions on mdn ...

Pinning violation reports
if a site makes use of key pinning, and your browser sees a certificate chain for that site which does not match the pin, firefox will reject the connection and display an error page.
... the error page displayed by firefox when you encounter a pin violation gives you the option of reporting this error.

SpeechRecognition: audioend event - Web APIs
the audioend event of the web speech api is fired when the user agent has finished capturing audio for speech recognition.
... bubbles no cancelable no interface event event handler onaudioend examples you can use the audioend event in an addeventlistener method: var recognition = new webkitspeechrecognition() || new speechrecognition(); recognition.addeventlistener('audioend', function() { console.log('audio capturing ended'); }); or use the onaudioend event handler property: recognition.onaudioend = function() { console.log('audio capturing ended'); } specifications specification status comment web speech apithe definition of 'speech recognition events' in that specification.

SpeechRecognition: audiostart event - Web APIs
the audiostart event of the web speech api is fired when the user agent has started to capture audio for speech recognition.
... bubbles no cancelable no interface event event handler onaudiostart examples you can use the audiostart event in an onaudiostart method: var recognition = new webkitspeechrecognition() || new speechrecognition(); recognition.addeventlistener('audiostart', function() { console.log('audio capturing started'); }); or use the onaudiostart event handler property: recognition.onaudiostart = function() { console.log('audio capturing started'); } specifications specification status comment web speech apithe definition of 'speech recognition events' in that specification.

SpeechRecognition.onaudioend - Web APIs
the onaudioend property of the speechrecognition interface represents an event handler that will run when the user agent has finished capturing audio (when the audioend event fires.) syntax myspeechrecognition.onaudioend = function() { ...
... }; examples var recognition = new speechrecognition(); recognition.onaudioend = function() { console.log('audio capturing ended'); } specifications specification status comment web speech apithe definition of 'onaudioend' in that specification.

SpeechRecognition.onaudiostart - Web APIs
the onaudiostart property of the speechrecognition interface represents an event handler that will run when the user agent has started to capture audio (when the audiostart event fires.) syntax myspeechrecognition.onaudiostart = function() { ...
... }; examples var recognition = new speechrecognition(); recognition.onaudiostart = function() { console.log('audio capturing started'); } specifications specification status comment web speech apithe definition of 'onaudiostart' in that specification.

Block cipher mode of operation - MDN Web Docs Glossary: Definitions of Web-related terms
a block cipher mode of operation, usually just called a "mode" in context, specifies how a block cipher should be used to encrypt or decrypt messages that are longer than the block size.

Localization: Frequently asked questions
for more detailed documentation about localization in general, see our localization page.

Selection.selectionLanguageChange() - Web APIs
selection.selectionlanguagechange() method is a gecko/firefox internal method that was exposed to web pages until firefox 29.

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 441 more matches

Bytecode Descriptions
expressions unary operators void stack: val ⇒ undefined pop the top value on the stack, discard it, and push undefined.
...jsop::typeof and jsop::typeofexpr are the same except that--amazingly--jsop::typeof affects the behavior of an immediately preceding jsop::getname or jsop::getgname instruction!
... emitting the same bytecode for these two expressions would be a bug.
...And 292 more matches

nsIAnnotationService
toolkit/components/places/public/nsiannotationservice.idlscriptable stores arbitrary data about a web page.
... supported for use from trusted code, such as extensions, but not from web content.
... 1.0 66 introduced gecko 1.9 inherits from: nsisupports last changed in gecko 2.0 (firefox 4 / thunderbird 3.3 / seamonkey 2.1) implemented by: "@mozilla.org/browser/annotation-service;1".
...And 269 more matches

SVG documentation index - SVG: Scalable Vector Graphics
found 383 pages: # page tags and summary 1 svg: scalable vector graphics 2d graphics, graphics, icons, images, reference, responsive design, svg, scalable graphics, scalable images, vector graphics, web, l10n:priority scalable vector graphics (svg) are an xml-based markup language for describing two-dimensional based vector graphics.xml 2 applying svg effects to html content css, guide, html, svg modern browsers support using svg within css styles to apply graphical effects to html content.
...this article lists these types along with their syntax and descriptions of what they're used for.
...versions of svg viewers prior to the release of firefox 1.5 unfortunately paid scant attention to namespaces, but they are essential to multi-xml dialect supporting user agents such as gecko-based browsers which must be very strict.
...And 199 more matches

Introduction to Public-Key Cryptography - Archive of obsolete content
public-key cryptography and related standards and techniques underlie the security features of many products such as signed and encrypted email, single sign-on, and secure sockets layer (ssl) communications.
...for an overview of ssl, see "introduction to ssl." for an overview of encryption and decryption, see "encryption and decryption." information on digital signatures is available from "digital signatures." public-key cryptography is a set of well-established techniques and standards for protecting communications from eavesdropping, tampering, and impersonation attacks.
... encryption and decryption allow two communicating parties to disguise information they send to each other.
...And 159 more matches

Chapter 5: Let's build a Firefox extension - Archive of obsolete content
« previousnext » this document was authored by taiga (gomita) gomibuchi and was originally published in japanese for the firefox developers conference summer 2007.
... gomita-san won "most useful upgraded extension" award in mozilla's 2006 "extend firefox" competition for scrapbook, and was runner-up in the "extend firefox 2" contest for firegestures.
... the chapters so far have each focused on technologies in isolation—xul, javascript, css, and xpcom.
...And 152 more matches

HTML documentation index - HTML: Hypertext Markup Language
found 237 pages: # page tags and summary 1 html: hypertext markup language html, html5, landing, web, l10n:priority html (hypertext markup language) is the most basic building block of the web.
...other technologies besides html are generally used to describe a web page's appearance/presentation (css) or functionality/behavior (javascript).
... 2 allowing cross-origin use of images and canvas advanced, cors, canvas, html, image, reference, security, storage, data html provides a crossorigin attribute for images that, in combination with an appropriate cors header, allows images defined by the <img> element that are loaded from foreign origins to be used in a <canvas> as if they had been loaded from the current origin.
...And 152 more matches