Interface SpeechSynthesis

The SpeechSynthesis interface of the Web Speech API is the controller interface for the speech service; this can be used to retrieve information about the synthesis voices available on the device, start and pause speech, and other commands besides.

MDN Reference

interface SpeechSynthesis {
    onvoiceschanged: ((this: SpeechSynthesis, ev: Event) => any) | null;
    paused: boolean;
    pending: boolean;
    speaking: boolean;
    addEventListener<K extends "voiceschanged">(
        type: K,
        listener: (this: SpeechSynthesis, ev: SpeechSynthesisEventMap[K]) => any,
        options?: boolean | AddEventListenerOptions,
    ): void;
    addEventListener(
        type: string,
        listener: EventListenerOrEventListenerObject,
        options?: boolean | AddEventListenerOptions,
    ): void;
    cancel(): void;
    dispatchEvent(event: Event): boolean;
    getVoices(): SpeechSynthesisVoice[];
    pause(): void;
    removeEventListener<K extends "voiceschanged">(
        type: K,
        listener: (this: SpeechSynthesis, ev: SpeechSynthesisEventMap[K]) => any,
        options?: boolean | EventListenerOptions,
    ): void;
    removeEventListener(
        type: string,
        listener: EventListenerOrEventListenerObject,
        options?: boolean | EventListenerOptions,
    ): void;
    resume(): void;
    speak(utterance: SpeechSynthesisUtterance): void;
}

Hierarchy

  • EventTarget
    • SpeechSynthesis
Index

Properties

onvoiceschanged paused pending speaking

Methods

addEventListener cancel dispatchEvent getVoices pause removeEventListener resume speak

Properties

onvoiceschanged: ((this: SpeechSynthesis, ev: Event) => any) | null

MDN Reference

paused: boolean

The paused read-only property of the true if the SpeechSynthesis object is in a paused state, or false if not.

MDN Reference

pending: boolean

The pending read-only property of the true if the utterance queue contains as-yet-unspoken utterances.

MDN Reference

speaking: boolean

The speaking read-only property of the true if an utterance is currently in the process of being spoken — even if SpeechSynthesis is in a A boolean value.

MDN Reference

Methods

  • The addEventListener() method of the EventTarget interface sets up a function that will be called whenever the specified event is delivered to the target.

    MDN Reference

    Type Parameters

    • K extends "voiceschanged"

    Parameters

    Returns void

  • The addEventListener() method of the EventTarget interface sets up a function that will be called whenever the specified event is delivered to the target.

    MDN Reference

    Parameters

    Returns void

  • The cancel() method of the SpeechSynthesis interface removes all utterances from the utterance queue.

    MDN Reference

    Returns void

  • 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 pause() method of the SpeechSynthesis interface puts the SpeechSynthesis object into a paused state.

    MDN Reference

    Returns void

  • The removeEventListener() method of the EventTarget interface removes an event listener previously registered with EventTarget.addEventListener() from the target.

    MDN Reference

    Type Parameters

    • K extends "voiceschanged"

    Parameters

    Returns void

  • The removeEventListener() method of the EventTarget interface removes an event listener previously registered with EventTarget.addEventListener() from the target.

    MDN Reference

    Parameters

    Returns void

  • The resume() method of the SpeechSynthesis interface puts the SpeechSynthesis object into a non-paused state: resumes it if it was already paused.

    MDN Reference

    Returns void

  • The speak() method of the SpeechSynthesis interface adds an SpeechSynthesisUtterance to the utterance queue; it will be spoken when any other utterances queued before it have been spoken.

    MDN Reference

    Parameters

    Returns void

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