SpeechRecognition: start() method

Limited availability

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

The start() method of the Web Speech API starts the speech recognition service listening to incoming audio with intent to recognize grammars associated with the current SpeechRecognition.

Syntax

js
start()

Parameters

None.

Return value

None (undefined).

Examples

js
const grammar =
  "#JSGF V1.0; grammar colors; public <color> = aqua | azure | beige | bisque | black | blue | brown | chocolate | coral | crimson | cyan | fuchsia | ghostwhite | gold | goldenrod | gray | green | indigo | ivory | khaki | lavender | lime | linen | magenta | maroon | moccasin | navy | olive | orange | orchid | peru | pink | plum | purple | red | salmon | sienna | silver | snow | tan | teal | thistle | tomato | turquoise | violet | white | yellow ;";
const recognition = new SpeechRecognition();
const speechRecognitionList = new SpeechGrammarList();
speechRecognitionList.addFromString(grammar, 1);
recognition.grammars = speechRecognitionList;

const diagnostic = document.querySelector(".output");
const bg = document.querySelector("html");

document.body.onclick = () => {
  recognition.start();
  console.log("Ready to receive a color command.");
};

abortBtn.onclick = () => {
  recognition.abort();
  console.log("Speech recognition aborted.");
};

recognition.onspeechend = () => {
  recognition.stop();
  console.log("Speech recognition has stopped.");
};

Specifications

Specification
Web Speech API
# dom-speechrecognition-start

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
start

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support
No support
No support

See also