The onend property of the SpeechSynthesisUtterance interface represents an event handler that will run when the utterance has finished being spoken (when the end event fires.)

API Experimental onend Property Reference speech SpeechSynthesisUtterance synthesis Web Speech API

The onmark property of the SpeechSynthesisUtterance interface represents an event handler that will run when the spoken utterance reaches a named SSML mark tag (when the mark event fires.)

API Experimental onmark Property Reference speech SpeechSynthesisUtterance synthesis Web Speech API

The onpause property of the SpeechSynthesisUtterance interface represents an event handler that will run when the utterance is paused part way through (when the pause event fires.)

API Experimental onpause Property Reference speech SpeechSynthesisUtterance synthesis Web Speech API

The onresume property of the SpeechSynthesisUtterance interface represents an event handler that will run when a paused utterance is resumed (when the resume event fires.)

API Experimental onresume Property Reference speech SpeechSynthesisUtterance synthesis Web Speech API

The onstart property of the SpeechSynthesisUtterance interface represents an event handler that will run when the utterance has begun to be spoken (when the start event fires.)

API Experimental onstart Property Reference speech SpeechSynthesisUtterance synthesis Web Speech API

The pitch property of the SpeechSynthesisUtterance interface gets and sets the pitch at which the utterance will be spoken at.

API Experimental pitch Property Reference speech SpeechSynthesisUtterance synthesis Web Speech API

The rate property of the SpeechSynthesisUtterance interface gets and sets the speed at which the utterance will be spoken at.

API Experimental Property rate Reference speech SpeechSynthesisUtterance synthesis Web Speech API

The text property of the SpeechSynthesisUtterance interface gets and sets the text that will be synthesised when the utterance is spoken.

API Experimental Property Reference speech SpeechSynthesisUtterance synthesis Text Web Speech API

The voice property of the SpeechSynthesisUtterance interface gets and sets the voice that will be used to speak the utterance.

API Experimental Property Reference speech SpeechSynthesisUtterance synthesis Voice Web Speech API

The volume property of the SpeechSynthesisUtterance interface gets and sets the volume that the utterance will be spoken at.

API Experimental Property Reference speech SpeechSynthesisUtterance synthesis Volume Web Speech API

The default read-only property of the SpeechSynthesisVoice interface returns a Boolean indicating whether the voice is the default voice for the current app (true), or not (false.)

API default Experimental Property Reference speech SpeechSynthesisVoice synthesis Web Speech API

The lang read-only property of the SpeechSynthesisVoice interface returns a BCP 47 language tag indicating the language of the voice.

API Experimental lang Property Reference speech SpeechSynthesisVoice synthesis Web Speech API

The localService read-only property of the SpeechSynthesisVoice interface returns a Boolean indicating whether the voice is supplied by a local speech synthesizer service (true), or a remote speech synthesizer service (false.)

API Experimental localService Property Reference speech SpeechSynthesisVoice synthesis Web Speech API

The name read-only property of the SpeechSynthesisVoice interface returns a human-readable name that represents the voice.

API Experimental name Property Reference speech SpeechSynthesisVoice synthesis Web Speech API

The voiceURI read-only property of the SpeechSynthesisVoice interface returns the type of URI and location of the speech synthesis service for this voice.

API Experimental Property Reference speech SpeechSynthesisVoice synthesis voiceURI Web Speech API

animate() Animation API Experimental KeyframeEffect() KeyframeEffectReadOnly() Reference setKeyframes() SharedKeyframeList() waapi web animations api

This article explains the basics of getting started with the Web Telephony API.

Advanced B2G Certified Firefox OS NeedsContent Phone Telephony Web Telephony WebAPI

WebVTT is a format for displaying timed text tracks (e.g. subtitles or captions) with the <track> element. The primary purpose of WebVTT files is to add text overlays to a <video>. WebVTT is a text based format, which must be encoded in UTF-8 format. Where you can use spaces you can also use tabs.

API captions Intermediate NeedsUpdate Reference subtitles text tracks Web Video Text Tracks WebVTT

API Experimental Expérimental Property Reference Référence Service Workers Web Workers WorkerGlobalScope

Element HTML HTML embedded content HTML5 Media Multimedia NeedsMobileBrowserCompatibility Reference Web