OptionaldefaultWhether the text track should be enabled by default.
- Only one text track per TextTrack.kind may be marked as default.
OptionalformatThe format of the track, represented by a value from the following list:
- 'srt'
- 'ttml'
- 'webvtt'
- 'emsg'
- 'eventstream'
- 'id3'
- 'cea608'
- 'daterange'
Optional InternalidThe identifier of this text track.
OptionalkindThe kind of the text track, represented by a value from the following list:
- 'subtitles': The track provides subtitles, used to display subtitles in a video.
- 'captions': The track provides a translation of dialogue and sound effects (suitable for users with a hearing impairment).
- 'descriptions': The track provides a textual description of the video (suitable for users with a vision impairment).
- 'chapters': The track provides chapter titles (suitable for navigating the media resource).
- 'metadata': The track provides content used by scripts and is not visible for users.
OptionallabelA label for the text track.
The source URL of the text track.
OptionalsrclangThe language of the text track.
Optional InternalsubtitleThe localTime that matches the PTS value that is used to sync the track with the video.
Optional InternalsubtitleThe PTS value used to sync the track with the video.
Describes the configuration of a side-loaded text track.