length
Summary
The length attribute of a TextTrackList object returns the number of text tracks in the list represented by the TextTrackList.
Property of apis/audio-video/TextTrackListapis/audio-video/TextTrackList
Syntax
Note: This property is read-only.
var result = TextTrackList.length;
Return Value
Returns an object of type unsigned longunsigned long
Examples
//. . .
var myTextTrackList = document.getElementById("entrack").textTracks;
// report how many text tracks are in the list
alert(myTextTrackList.length);
//. . .
Notes
The maximum number of audio tracks a video can contain has not been defined in the World Wide Web Consortium (W3C) specification.
Related specifications
- W3C HTML5 Specification
- W3C Editor’s Draft
Attributions
Microsoft Developer Network: Windows Internet Explorer API reference Article