This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The speechstart event of the Web Speech API is fired when sound recognized by the speech recognition service as speech has been detected.
| Bubbles | No |
|---|---|
| Cancelable | No |
| Interface | Event |
| Event handler property | onspeechstart |
Examples
You can use the speechstart event in an addEventListener method:
var recognition = new webkitSpeechRecognition() || new SpeechRecognition();
recognition.addEventListener('speechstart', function() {
console.log('Speech has been detected');
});
Or use the onspeechstart event handler property:
recognition.onspeechstart = function() {
console.log('Speech has been detected');
}
Specifications
| Specification | Status | Comment |
|---|---|---|
| Web Speech API The definition of 'speech recognition events' in that specification. |
Draft |
Browser compatibility
The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
speechstart event | Chrome Full support 33 | Edge Full support 79 | Firefox No support No | IE No support No | Opera No support No | Safari No support No | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android No support No | Opera Android No support No | Safari iOS No support No | Samsung Internet Android Full support Yes |
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.