#import #import // https://html.spec.whatwg.org/multipage/media.html#trackevent [Exposed=Window, UseNewAKString] interface TrackEvent : Event { constructor(DOMString type, optional TrackEventInit eventInitDict = {}); // FIXME: Should be: (VideoTrack or AudioTrack or TextTrack)? readonly attribute VideoTrack? track; }; dictionary TrackEventInit : EventInit { // FIXME: Should be: (VideoTrack or AudioTrack or TextTrack)? VideoTrack? track = null; };