SpeechRecognition: start event
Limited availability
This feature is not Baseline because it does not work in some of the most widely-used browsers.
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.
Syntax
Use the event name in methods like addEventListener(), or set an event handler property.
js
addEventListener("start", (event) => { })
onstart = (event) => { }
Event type
A generic Event with no added properties.
Examples
You can use the start event in an addEventListener method:
js
const recognition = new (SpeechRecognition || webkitSpeechRecognition)();
recognition.addEventListener("start", () => {
console.log("Speech recognition service has started");
});
Or use the onstart event handler property:
js
recognition.onstart = () => {
console.log("Speech recognition service has started");
};
Specifications
| Specification |
|---|
| Web Speech API # eventdef-speechrecognition-start |
| Web Speech API # dom-speechrecognition-onstart |
Browser compatibility
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start event
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Legend
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- Full support
- Full support
- No support
- No support
- User must explicitly enable this feature.