SpeechRecognition: speechstart event

Limited availability

This feature is not Baseline because it does not work in some of the most widely-used browsers.

The speechstart event of the Web Speech API is fired when sound recognized by the speech recognition service as speech has been detected.

Syntax

Use the event name in methods like addEventListener(), or set an event handler property.

js
addEventListener("speechstart", (event) => {});

onspeechstart = (event) => {};

Event type

A generic Event with no added properties.

Examples

You can use the speechstart event in an addEventListener method:

js
const recognition = new webkitSpeechRecognition() || new SpeechRecognition();

recognition.addEventListener("speechstart", () => {
  console.log("Speech has been detected");
});

Or use the onspeechstart event handler property:

js
recognition.onspeechstart = () => {
  console.log("Speech has been detected");
};

Specifications

Specification
Web Speech API
# eventdef-speechrecognition-speechstart
Web Speech API
# dom-speechrecognition-onspeechstart

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
speechstart event

Legend

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Full support
Full support
No support
No support

See also