SpeechRecognition: start event

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

The start event of the Web Speech API SpeechRecognition object is fired when the speech recognition service has begun listening to incoming audio with intent to recognize grammars associated with the current SpeechRecognition.

Bubbles No
Cancelable No
Interface Event
Event handler property onstart

Examples

You can use the start event in an addEventListener method:

var recognition = new webkitSpeechRecognition() || new SpeechRecognition();

recognition.addEventListener('start', function() { 
  console.log('Speech recognition service has started');
});

Or use the onstart event handler property:

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

Specifications

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

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
start/code> event
Experimental
Chrome Full support 33Edge No support NoFirefox No support NoIE No support NoOpera No support NoSafari No support NoWebView Android Full support YesChrome Android Full support YesFirefox Android No support NoOpera Android No support NoSafari iOS No support NoSamsung Internet Android ?

Legend

Full support  
Full support
No support  
No support
Compatibility unknown  
Compatibility unknown
Experimental. Expect behavior to change in the future.
Experimental. Expect behavior to change in the future.

See also

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