VTTCue Constructor never calls super class (TextTrackCue)

[marcoscaceres]

Although it sets start and end time (it shouldn't do that, it's the responsibility of TextTrackCue), it's missing a call its super class passing the start and end times.

[nigelmegitt]

Since TextTrackCue doesn't have a constructor, there's no call to be made.

See also discussion at WICG/datacue#35 in which a proposal is made to add such a constructor; if that is done, then VTTCue would indeed need to call it.

[rjksmith]

@marcoscaceres I completely agree. VTTCue should inherit TextTrackCue's properties by calling its parent's constructor from its own via super as you describe.

I've raised a proposal to expose the TextTrackCue constructor in the web interface and written an explainer in WICG DataCue that summarises the discussion. This simple change would rectify the problem in a way that encourages adoption, and I'd welcome your support to progress this effort. Thanks.