TextTrack does not contain an id attribute like AudioTrack & VideoTrack so they can't be reference by Media Fragment URIs like audio & video can.
I propose that the id attribute be added to TextTrack and a getTrackById() method be added to TextTrackList so that these objects are consistent with the audio and video counterparts.
Moving this to HTML.next as we work to lock down HTML5.0 for CR.
Seems reasonable to me.
Mass move to "HTML WG"
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(accepted from WHATWG)
Rationale: makes sense to have it consistent - and it could be used for media fragment URIs