1206304 - Created text tracks don't appear in the textTracks list

Status: RESOLVED DUPLICATE of bug 1242599

(Core :: Audio/Video: Playback, defect, P2)

Description

[Yury Delendik (:yury)]

Attachment: Test case

The created TextTrack (via document.createElement) doesn't appear in the video element's textTracks property, until the track's track property accessed.

        var track = document.createElement('track');
        track.kind = "subtitles"; track.label = "English"; track.srclang = "en";
        video.appendChild(track);
        // track.track; // when un-commented, the line below prints 1
        console.log(video.textTracks.length); // prints 0

Comment 1

[David Flanagan [:djf]]

In bug 1214027 I've found that textTracks is updated asynchronously, so if I put the console.log() inside of a setTimeout, then textTracks is defined.