Interface SpeechSynthesisUtterance

This Web Speech API interface represents a speech request. It contains the content the speech service should read and information about how to read it (e.g. language, pitch and volume.)

MDN Reference

interface SpeechSynthesisUtterance {
    lang: string;
    onboundary: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisEvent) => any);
    onend: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisEvent) => any);
    onerror: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisErrorEvent) => any);
    onmark: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisEvent) => any);
    onpause: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisEvent) => any);
    onresume: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisEvent) => any);
    onstart: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisEvent) => any);
    pitch: number;
    rate: number;
    text: string;
    voice: null | SpeechSynthesisVoice;
    volume: number;
    addEventListener<K>(type: K, listener: ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisUtteranceEventMap[K]) => any), options?: boolean | AddEventListenerOptions): void;
    addEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | AddEventListenerOptions): void;
    dispatchEvent(event: Event): boolean;
    removeEventListener<K>(type: K, listener: ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisUtteranceEventMap[K]) => any), options?: boolean | EventListenerOptions): void;
    removeEventListener(type: string, listener: EventListenerOrEventListenerObject, options?: boolean | EventListenerOptions): void;
}

Hierarchy

  • EventTarget
    • SpeechSynthesisUtterance

Properties

lang: string
onboundary: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisEvent) => any)
onend: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisEvent) => any)
onerror: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisErrorEvent) => any)
onmark: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisEvent) => any)
onpause: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisEvent) => any)
onresume: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisEvent) => any)
onstart: null | ((this: SpeechSynthesisUtterance, ev: SpeechSynthesisEvent) => any)
pitch: number
rate: number
text: string
voice: null | SpeechSynthesisVoice
volume: number

Methods

  • 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

    Parameters

    Returns 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

  • 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

    • event: Event

    Returns boolean