API Constructor Experimental Push Push API PushEvent Reference Service Workers

API Constructor DOM DOM Reference Experimental Expérimental Range Reference Référence

API Constructor Experimental Expérimental Fetch Reference request Référence

The SharedWorker() constructor creates a SharedWorker object that executes the script at the specified URL. This script must obey the same-origin policy.

API Constructor Reference Shared Workers SharedWorker Web Workers

API Constructor Experimental Reference speech SpeechGrammar Web Web Speech API

API Constructor Experimental recognition Reference speech SpeechGrammarList Web Speech API

API Constructor Experimental recognition Reference speech SpeechRecognition Web Speech API

The SpeechSynthesisUtterance() constructor of the SpeechSynthesisUtterance interface returns a new SpeechSynthesisUtterance object instance.

API Constructor Reference speech SpeechSynthesisUtterance synthesis Web Speech API

API Background Sync Constructor Experimental Reference ServiceWorker SyncEvent

The TextEncoder() constructor returns a newly created TextEncoder object for the encoding specified in parameter.

API Constructor Encoding Experimental Expérimental Reference Référence TextEncoder

API Constructor CSS CSS3 Transitions CSSOM Experimental Reference TransitionEvent

API Constructor Obsolete Reference Référence Virtual Reality VR VRFieldOfView WebVR

JavaScript is designed on a simple object-based paradigm. An object is a collection of properties, and a property is an association between a name (or key) and a value. A property's value can be a function, in which case the property is known as a method. In addition to objects that are predefined in the browser, you can define your own objects. This chapter describes how to use objects, properties, functions, and methods, and how to create your own objects.

beginner Beginner Comparing object Constructor Document Guide JavaScript Object

Animation AnimationPlaybackEvent AnimationPlaybackEvent() API Constructor Experimental Reference waapi web animations api

API BlobEvent Constructor DOM DOM Reference Experimental Expérimental Media Stream Encoding Reference Référence

API Broadcast Channel API BroadcastChannel Constructor Experimental Expérimental HTML API Reference Référence

Animation API Constructor DocumentTimeline DocumentTimeline() Experimental Reference waapi web animations api

API Constructor HTML DOM HTMLImageElement NeedsBrowserCompatibility NeedsContent NeedsMarkupWork NeedsSpecTable Reference Référence

Animation API Constructor Experimental KeyframeEffectReadOnly KeyframeEffectReadOnly() Reference waapi web animations api

The MediaSource() constructor of the MediaSource interface constructs and returns a new MediaSource object with no associated source buffers.

API Audio Constructor Experimental Media Source Extensions MediaSource MSE Reference Video