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    Interface TextTrackList

    The TextTrackList interface is used to represent a list of the text tracks defined for the associated video or audio element, with each track represented by a separate textTrack object in the list.

    MDN Reference

    interface TextTrackList {
        length: number;
        onaddtrack: ((this: TextTrackList, ev: TrackEvent) => any) | null;
        onchange: ((this: TextTrackList, ev: Event) => any) | null;
        onremovetrack: ((this: TextTrackList, ev: TrackEvent) => any) | null;
        addEventListener<K extends keyof TextTrackListEventMap>(
            type: K,
            listener: (this: TextTrackList, ev: TextTrackListEventMap[K]) => any,
            options?: boolean | AddEventListenerOptions,
        ): void;
        addEventListener(
            type: string,
            listener: EventListenerOrEventListenerObject,
            options?: boolean | AddEventListenerOptions,
        ): void;
        dispatchEvent(event: Event): boolean;
        getTrackById(id: string): TextTrack | null;
        removeEventListener<K extends keyof TextTrackListEventMap>(
            type: K,
            listener: (this: TextTrackList, ev: TextTrackListEventMap[K]) => any,
            options?: boolean | EventListenerOptions,
        ): void;
        removeEventListener(
            type: string,
            listener: EventListenerOrEventListenerObject,
            options?: boolean | EventListenerOptions,
        ): void;
        [index: number]: TextTrack;
    }

    Hierarchy

    • EventTarget
      • TextTrackList

    Indexable

    Index

    Properties

    length onaddtrack onchange onremovetrack

    Methods

    addEventListener dispatchEvent getTrackById removeEventListener

    Properties

    length: number

    The read-only TextTrackList property length returns the number of entries in the TextTrackList, each of which is a TextTrack representing one track in the media element.

    MDN Reference

    onaddtrack: ((this: TextTrackList, ev: TrackEvent) => any) | null

    MDN Reference

    onchange: ((this: TextTrackList, ev: Event) => any) | null

    MDN Reference

    onremovetrack: ((this: TextTrackList, ev: TrackEvent) => any) | null

    MDN Reference

    Methods

    • The dispatchEvent() method of the EventTarget sends an Event to the object, (synchronously) invoking the affected event listeners in the appropriate order.

      MDN Reference

      Parameters

      • event: Event

      Returns boolean

    • The TextTrackList method getTrackById() returns the first id matches the specified string.

      MDN Reference

      Parameters

      • id: string

      Returns TextTrack | null

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