Get the number of available audio tracks:
var x = document.getElementById("myAudio").audioTracks.length;
Click the button to get the number of available audio tracks.
The audioTracks property is not supported in any major browsers.
<!DOCTYPE html> <html> <body> <audio id="myAudio" controls> <source src="sound.ogg" type="audio/ogg"> <source src="sound.mp3" type="audio/mpeg"> Your browser does not support the audio element. </audio>/*from ww w . ja v a2s . co m*/ <button onclick="myFunction()">Test</button> <p id="demo"></p> <script> function myFunction() { var x = document.getElementById("myAudio").audioTracks.length; document.getElementById("demo").innerHTML = x; } </script> </body> </html>
The audioTracks property returns a AudioTrackList object.
The AudioTrackList object stores the available audio tracks for the audio.
Each available audio track is represented by an AudioTrack Object.
AudioTrackList Object:
| Value | Description |
|---|---|
audioTracks.length | get the number of audio tracks available |
audioTracks.getTrackById(id) | get AudioTrack object by id |
audioTracks[index] | get AudioTrack object by index |
AudioTrack Object Properties:
| Property | Description |
|---|---|
| id | get the id of the audio track |
| kind | get the type of the audio track Possible value: "alternative" "description" "main" "translation" "commentary" "" (empty string)) |
| label | get the label of the audio track |
| language | get the language of the audio track |
| enabled | get or set if the track is active, true|false |