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SpeechRecognition: speechstart event

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

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
speechstart_event 33 79 No No 20 14.1 4.4.3 33 No 20 14.5 2.0

See also

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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/SpeechRecognition/speechstart_event