AudioTrack.label - Web APIs 编辑

The read-only AudioTrack property label returns a string specifying the audio track's human-readable label, if one is available; otherwise, it returns an empty string.

Syntax

var audioTrackLabel = AudioTrack.label;

Value

A DOMString specifying the track's human-readable label, if one is available in the track metadata. Otherwise, an empty string ("") is returned.

For example, a track whose kind is "commentary" might have a label such as "Commentary with director Mark Markmarkimark and star Donna Donnalidon".

Example

This example returns an array of track kinds and labels for potential use in a user interface to select audio tracks for a specified media element. The list is filtered to only allow certain track kinds through.

function getTrackList(el) {
  var trackList = [];
  const wantedKinds = [
    "main", "alternative", "main-desc", "translation", "commentary"
  ];

  el.audioTracks.forEach(function(track) {
    if (wantedKinds.includes(track.kind)) {
      trackList.push({
        id: track.id,
        kind: track.kind,
        label: track.label
      });
    }
  });
  return trackList;
}

The resulting trackList contains an array of audio tracks whose kind is one of those in the array wantedKinds, with each entry providing the track's id, kind, and label.

Specifications

Browser compatibility

BCD tables only load in the browser