SpeechRecognition: start event

{{APIRef("Web Speech API")}} 

The start event of the Web Speech API {{domxref("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 {{domxref("EventTarget.addEventListener", "addEventListener()")}} , or set an event handler property.

addEventListener("start", (event) => { })

onstart = (event) => { }

Event type

A generic {{DOMxRef("Event")}}  with no added properties.

Examples

You can use the start event in an addEventListener method:

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

recognition.addEventListener("start", () => {
  console.log("Speech recognition service has started");
});

Or use the onstart event handler property:

recognition.onstart = () => {
  console.log("Speech recognition service has started");
};

Specifications

{{Specifications}} 

Browser compatibility

{{Compat}} 

See also

• Web Speech API