export default class DummyCue implements TextTrackCue { public startTime : number ; public endTime : number ; public id : string = '' ; public pauseOnExit : boolean = false ; public onenter : ( ( this : TextTrackCue , ev : Event ) => any ) | null = null ; public onexit : ( ( this : TextTrackCue , ev : Event ) => any ) | null = null ; public readonly track : TextTrack | null = null ; public constructor ( startTime , endTime ) { this . startTime = startTime ; this . endTime = endTime ; } public addEventListener < K extends keyof TextTrackCueEventMap > ( type , listener , options ? ) { } public removeEventListener < K extends keyof TextTrackCueEventMap > ( type , listener , options ? ) { } public dispatchEvent ( ev ) { return false ; } }