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AudioTrack.enabled

The AudioTrack property enabled specifies whether or not the described audio track is currently enabled for use. If the track is disabled by setting enabled to false, the track is muted and does not produce audio.

Syntax

isAudioEnabled = AudioTrack.enabled;

AudioTrack.enabled = true | false;

Value

The enabled property is a Boolean whose value is true if the track is enabled; enabled tracks produce audio while the media is playing. Setting enabled to false effectively mutes the audio track, preventing it from contributing to the media's audio performance.

Example

This example switches between the main and commentary audio tracks of a media element.

function swapCommentaryMain() {
  var videoElem = document.getElementById("main-video");
  var audioTrackMain;
  var audioTrackCommentary;

  videoElem.audioTracks.forEach(track) {
    if (track.kind === "main") {
      audioTrackMain = track;
    } else if (track.kind === "commentary") {
      audioTrackCommentary = track;
    }
  }

  if (audioTrackMain && audioTrackCommentary) {
    var commentaryEnabled = audioTrackCommentary.enabled;
    audioTrackCommentary.enabled = audioTrackMain.enabled;
    audioTrackMain.enabled = commentaryEnabled;
  }
}

The swapCommentaryMain() function above finds within the audio tracks of the <video> element "main-video" the audio tracks whose kind values are "main" and "commentary". These represent the primary audio track and the commentary track.

Note: This example assumes that there is only one of each kind of track in the video, but this is not necessarily the case.

The element's audio tracks are then scanned through using the JavaScript forEach() method (although the audioTracks property of a media element isn't actually a JavaScript array, it can be accessed like one for the most part).

The scan looks for the tracks whose kind values are "main" and "commentary" and remembers those AudioTrack objects. Once those have been found, the values of the two tracks' enabled properties are exchanged, which results in swapping which of the two tracks is currently active.

Specifications

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
Basic support ? ? ? ? ? ?
Mobile
Android webview Chrome for Android Edge Mobile Firefox for Android Opera for Android iOS Safari Samsung Internet
Basic support ? ? ? ? ? ? ?

© 2005–2018 Mozilla Developer Network and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/API/AudioTrack/enabled