Interface TrackControllerEventMap<TrackLoadOptionsType>

Dispatched when the queue has changed.

Will be emitted before trackActivated.

Emitted when the last track of the playback queue (and any of its postroll ads) have ended.

A track became active. For content this may be deferred behind a preroll; for an ad it fires as the ad activates. queueChange precedes it.

A previously-active track was torn down (superseded or unloaded).

Emitted when the current track — including any postroll ads — has finished playing. Fires once per track: as the queue advances it precedes the resulting trackActivated, and for the final track it precedes queueEnded. Distinct from the media element's ended (which also fires for each ad) and from an individual ad's adEnded, so applications can act on true track completion (e.g. logging a play) without confusing it with an ad ending or the content ending before its postroll plays.