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.

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:

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

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

Or use the onspeechstart event handler property:

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

Docs

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