This is an experimental technology
Check the Browser compatibility table carefully before using this in production.
The onspeechstart property of the SpeechRecognition interface represents an event handler that will run when sound recognised by the speech recognition service as speech has been detected (when the speechstart event fires.)
Syntax
mySpeechRecognition.onspeechstart = function() { ... };
Examples
recognition.onspeechstart = function() {
console.log('Speech has been detected');
}
Specifications
| Specification | Status | Comment |
|---|---|---|
| Web Speech API The definition of 'onspeechstart' 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.
Update compatibility data on GitHub
| Desktop | Mobile | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Basic support | Chrome
Full support
33
| Edge ? | 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
| Edge Mobile ? | Firefox Android No support No | Opera Android No support No | Safari iOS No support No | Samsung 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 implementation notes.
- See implementation notes.
- Requires a vendor prefix or different name for use.
- Requires a vendor prefix or different name for use.