HTML | DOM Video textTracks Property

Last Updated : 30 Oct, 2019

The Video textTracks property is used for returning a TextTrackList object.
The TextTrackList object is used for representing the available text tracks for a video.
Each text track which is available is represented by a separate TextTrack Object.

Syntax:

videoObject.textTracks

Return Values

TextTrackList Object: It represents the available text tracks for the video.
- length: It is used to get the number of text tracks available in the video.
- [index]: It is used to get the TextTrack object by index.
TextTrack Object: It represents a text track.
- kind: It is used to get the type of the text track.
- label: It is used to get the label of the text track.
- language: It is used to get the language of the text track.
- mode: It is used to get or set if the track is active or not.
- cues: It is used to get a list of cues as a TextTrackCueList object.
- activeCues: It is used to get the currently active text track cues as a TextTrackCueList object.
- addCue(cue): It is used to add a cue to the list of cues.
- removeCue(cue): It is used to remove a cue from the list of cues.

Below program illustrates the Video textTracks property :
Example: Getting the number of available text tracks.

<!DOCTYPE html> 
<html> 
  
<head> 
    <title> 
        Video textTracks Property 
    </title> 
</head> 
  
<body style="text-align: center"> 
  
    <h1 style="color: green">GeeksforGeeks</h1> 
    <h2 style="font-family: Impact"> 
      Video textTracks Property 
  </h2> 
    <br> 
  
    <video id="Test_Video" 
           width="360" 
           height="240"
           controls> 
        
        <source src="sample2.mp4" 
                type="video/mp4"> 
        <source src="sample2.ogg" 
                type="video/ogg"> 
        <track src="testsub.vtt"> 
            <track src="testsub2.srt"> 
    </video> 
  
    <p>To get the number of available text tracks of the  
      video, double click the "Return Text Tracks" button. 
        <br> 
  
        <button ondblclick="My_Video()"> 
          Return Text Tracks 
      </button> 
  
        <p id="test"></p> 
  
        <script> 
            function My_Video() { 
                var v = document.getElementById( 
                  "Test_Video").textTracks.length; 
                document.getElementById("test").innerHTML = v; 
            } 
        </script> 
  
</body> 
  
</html> 