Interface TextTrack

    This interface also inherits properties from EventTarget.

    MDN Reference

    interface TextTrack {
        activeCues: TextTrackCueList;
        cues: TextTrackCueList;
        id: string;
        inBandMetadataTrackDispatchType: string;
        kind: TextTrackKind;
        label: string;
        language: string;
        mode: TextTrackMode;
        oncuechange: (this: TextTrack, ev: Event) => any;
        addCue(cue: TextTrackCue): void;
        addEventListener<K extends "cuechange">(
            type: K,
            listener: (this: TextTrack, ev: TextTrackEventMap[K]) => any,
            options?: boolean | AddEventListenerOptions,
        ): void;
        addEventListener(
            type: string,
            listener: EventListenerOrEventListenerObject,
            options?: boolean | AddEventListenerOptions,
        ): void;
        dispatchEvent(event: Event): boolean;
        removeCue(cue: TextTrackCue): void;
        removeEventListener<K extends "cuechange">(
            type: K,
            listener: (this: TextTrack, ev: TextTrackEventMap[K]) => any,
            options?: boolean | EventListenerOptions,
        ): void;
        removeEventListener(
            type: string,
            listener: EventListenerOrEventListenerObject,
            options?: boolean | EventListenerOptions,
        ): void;
    }
    Hierarchy

    Properties

    activeCues cues id inBandMetadataTrackDispatchType kind label language mode oncuechange

    Methods

    addCue addEventListener dispatchEvent removeCue removeEventListener

    Properties

    ReadonlyactiveCues

    activeCues: TextTrackCueList

    Returns the text track cues from the text track list of cues that are currently active (i.e. that start before the current playback position and end after it), as a TextTrackCueList object.

    MDN Reference

    Readonlycues

    cues: TextTrackCueList

    Returns the text track list of cues, as a TextTrackCueList object.

    MDN Reference

    Readonlyid

    id: string

    Returns the ID of the given track.

    For in-band tracks, this is the ID that can be used with a fragment if the format supports media fragment syntax, and that can be used with the getTrackById() method.

    For TextTrack objects corresponding to track elements, this is the ID of the track element.

    MDN Reference

    ReadonlyinBandMetadataTrackDispatchType

    inBandMetadataTrackDispatchType: string

    Returns the text track in-band metadata track dispatch type string.

    MDN Reference

    Readonlykind

    kind: TextTrackKind

    Returns the text track kind string.

    MDN Reference

    Readonlylabel

    label: string

    Returns the text track label, if there is one, or the empty string otherwise (indicating that a custom label probably needs to be generated from the other attributes of the object if the object is exposed to the user).

    MDN Reference

    Readonlylanguage

    language: string

    Returns the text track language string.

    MDN Reference

    mode

    mode: TextTrackMode

    Returns the text track mode, represented by a string from the following list:

    Can be set, to change the mode.

    MDN Reference

    oncuechange

    oncuechange: (this: TextTrack, ev: Event) => any

    MDN Reference

    Methods

    addCue

    addEventListener

    • addEventListener<K extends "cuechange">(
          type: K,
          listener: (this: TextTrack, ev: TextTrackEventMap[K]) => any,
          options?: boolean | AddEventListenerOptions,
      ): void

    • Appends an event listener for events whose type attribute value is type. The callback argument sets the callback that will be invoked when the event is dispatched.

      The options argument sets listener-specific options. For compatibility this can be a boolean, in which case the method behaves exactly as if the value was specified as options's capture.

      When set to true, options's capture prevents callback from being invoked when the event's eventPhase attribute value is BUBBLING_PHASE. When false (or not present), callback will not be invoked when event's eventPhase attribute value is CAPTURING_PHASE. Either way, callback will be invoked if event's eventPhase attribute value is AT_TARGET.

      When set to true, options's passive indicates that the callback will not cancel the event by invoking preventDefault(). This is used to enable performance optimizations described in § 2.8 Observing event listeners.

      When set to true, options's once indicates that the callback will only be invoked once after which the event listener will be removed.

      If an AbortSignal is passed for options's signal, then the event listener will be removed when signal is aborted.

      The event listener is appended to target's event listener list and is not appended if it has the same type, callback, and capture.

      MDN Reference

      Type Parameters

      • K extends "cuechange"

      Parameters

      Returns void

    • addEventListener(
          type: string,
          listener: EventListenerOrEventListenerObject,
          options?: boolean | AddEventListenerOptions,
      ): void

    • Appends an event listener for events whose type attribute value is type. The callback argument sets the callback that will be invoked when the event is dispatched.

      The options argument sets listener-specific options. For compatibility this can be a boolean, in which case the method behaves exactly as if the value was specified as options's capture.

      When set to true, options's capture prevents callback from being invoked when the event's eventPhase attribute value is BUBBLING_PHASE. When false (or not present), callback will not be invoked when event's eventPhase attribute value is CAPTURING_PHASE. Either way, callback will be invoked if event's eventPhase attribute value is AT_TARGET.

      When set to true, options's passive indicates that the callback will not cancel the event by invoking preventDefault(). This is used to enable performance optimizations described in § 2.8 Observing event listeners.

      When set to true, options's once indicates that the callback will only be invoked once after which the event listener will be removed.

      If an AbortSignal is passed for options's signal, then the event listener will be removed when signal is aborted.

      The event listener is appended to target's event listener list and is not appended if it has the same type, callback, and capture.

      MDN Reference

      Parameters

      Returns void

    dispatchEvent

    • dispatchEvent(event: Event): boolean

    • Dispatches a synthetic event event to target and returns true if either event's cancelable attribute value is false or its preventDefault() method was not invoked, and false otherwise.

      MDN Reference

      Parameters

      Returns boolean

    removeCue

    removeEventListener

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