SpeechRecognition.onstart

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

The onstart property of the SpeechRecognition interface represents an event handler that will run when the speech recognition service has begun listening to incoming audio with intent to recognize grammars associated with the current SpeechRecognition (when the start event fires.)

Syntax

mySpeechRecognition.onstart = function() { ... };

Examples

recognition.onstart = function() {
  console.log('Speech recognition service has started');
}

Specifications

Specification	Status	Comment
Web Speech API The definition of 'onstart' in that specification.	Draft

Browser compatibility

Update compatibility data on GitHub

	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
`onstart` Experimental	Chrome Full support 33 Prefixed Notes Full support 33 Prefixed Notes Prefixed Implemented with the vendor prefix: webkit Notes You'll need to serve your code through a web server for recognition to work.	Edge Full support ≤79 Prefixed Notes Full support ≤79 Prefixed Notes Prefixed Implemented with the vendor prefix: webkit Notes You'll need to serve your code through a web server for recognition to work.	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android Full support Yes Prefixed Notes Full support Yes Prefixed Notes Prefixed Implemented with the vendor prefix: webkit Notes You'll need to serve your code through a web server for recognition to work.	Chrome Android Full support Yes Prefixed Notes Full support Yes Prefixed Notes Prefixed Implemented with the vendor prefix: webkit Notes You'll need to serve your code through a web server for recognition to work.	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support Yes Prefixed Notes Full support Yes Prefixed Notes Prefixed Implemented with the vendor prefix: webkit Notes You'll need to serve your code through a web server for recognition to work.

Legend

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.: Experimental. Expect behavior to change in the future.
See implementation notes.: See implementation notes.
Requires a vendor prefix or different name for use.: Requires a vendor prefix or different name for use.