SpeechSynthesisUtterance: start event

This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

The start event of the Web Speech API SpeechSynthesisUtterance object is fired when the utterance has begun to be spoken.

Examples

You can use the start event in an addEventListener method:

utterThis.addEventListener('start', function(event) { 
  console.log('We have started uttering this speech: ' + event.utterance.text);
});

Or use the onstart event handler property:

utterThis.onstart = function(event) {
  console.log('We have started uttering this speech: ' + event.utterance.text);
}

Specification	Status	Comment
Web Speech API The definition of 'speech synthesis utterance events' in that specification.	Draft

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`start` event Experimental	Chrome Full support 33	Edge Full support 14	Firefox Full support 49	IE No support No	Opera Full support 21	Safari Full support 7	WebView Android No support No	Chrome Android Full support 33	Firefox Android Full support 62 Full support 62 No support 61 — 62 Disabled Disabled From version 61 until version 62 (exclusive): this feature is behind the `media.webspeech.synth.enabled` preference (needs to be set to `true`). To change preferences in Firefox, visit about:config.	Opera Android No support No	Safari iOS Full support 7	Samsung Internet Android Full support 3.0

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.: Experimental. Expect behavior to change in the future.
User must explicitly enable this feature.: User must explicitly enable this feature.