Web/API/MediaStreamTrack/unmute event

The unmute event is sent to a MediaStreamTrack when the track's source is once again able to provide media data after a period of not being able to do so. This ends the muted state that began with the mute event.

Bubbles	No
Cancelable	No
Interface	Event
Event handler property	onunmute

Note: The condition that most people think of as "muted" (that is, a user-controllable way to silence a track) is actually managed using the MediaStreamTrack.enabled property, for which there are no events.

Examples

In this example, event handlers are established for the mute and unmute events in order to detect when the media is not flowing from the source for the MediaStreamTrack stored in the variable musicTrack.

musicTrack.addEventListener("mute", event => {
  document.getElementById("timeline-widget").style.backgroundColor = "#aaa";
}, false);

musicTrack.addEventListener("unmute", event => {
 document.getElementById("timeline-widget").style.backgroundColor = "#fff";
}, false);

With these event handlers in place, when the track musicTrack enters its muted state, the element with the ID timeline-widget gets its background color changed to #aaa. When the track exits the muted state—detected by the arrival of an unmuted event—the background color is restored to white.

You can also use the onunmute event handler property to set up a handler for this event; similarly, the onmute event handler is available for setting up a handler for the mute event. The following example shows this:

musicTrack.onmute = event => {
  document.getElementById("timeline-widget").style.backgroundColor = "#aaa";
}

musicTrack.mute = event = > {
  document.getElementById("timeline-widget").style.backgroundColor = "#fff";
}

Specifications

Specification	Status	Comment
Media Capture and StreamsThe definition of 'unmute' in that specification.	Candidate Recommendation	Initial specification.

Browser compatibility

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
unmute event	Chrome Full support Yes	Edge Full support 12	Firefox Full support 59	IE No support No	Opera Full support Yes	Safari Full support Yes	WebView Android Full support Yes	Chrome Android Full support Yes	Firefox Android Full support 59	Opera Android Full support Yes	Safari iOS Full support Yes	Samsung Internet Android Full support Yes

Legend

Full support  

Full support

No support  

No support

See also

• onunmute event handler property
• mute event

MediaStreamTrack: unmute event by Mozilla Contributors is licensed under CC-BY-SA 2.5.