Interface ServiceWorkerContainer

    The ServiceWorkerContainer interface of the ServiceWorker API provides an object representing the service worker as an overall unit in the network ecosystem, including facilities to register, unregister and update service workers, and access the state of service workers and their registrations. Available only in secure contexts.

    MDN Reference

    interface ServiceWorkerContainer {
        controller: ServiceWorker;
        oncontrollerchange: (this: ServiceWorkerContainer, ev: Event) => any;
        onmessage: (this: ServiceWorkerContainer, ev: MessageEvent) => any;
        onmessageerror: (this: ServiceWorkerContainer, ev: MessageEvent) => any;
        ready: Promise<ServiceWorkerRegistration>;
        addEventListener<K extends keyof ServiceWorkerContainerEventMap>(
            type: K,
            listener: (
                this: ServiceWorkerContainer,
                ev: ServiceWorkerContainerEventMap[K],
            ) => any,
            options?: boolean | AddEventListenerOptions,
        ): void;
        addEventListener(
            type: string,
            listener: EventListenerOrEventListenerObject,
            options?: boolean | AddEventListenerOptions,
        ): void;
        dispatchEvent(event: Event): boolean;
        getRegistration(
            clientURL?: string | URL,
        ): Promise<ServiceWorkerRegistration>;
        getRegistrations(): Promise<readonly ServiceWorkerRegistration[]>;
        register(
            scriptURL: string | URL,
            options?: RegistrationOptions,
        ): Promise<ServiceWorkerRegistration>;
        removeEventListener<K extends keyof ServiceWorkerContainerEventMap>(
            type: K,
            listener: (
                this: ServiceWorkerContainer,
                ev: ServiceWorkerContainerEventMap[K],
            ) => any,
            options?: boolean | EventListenerOptions,
        ): void;
        removeEventListener(
            type: string,
            listener: EventListenerOrEventListenerObject,
            options?: boolean | EventListenerOptions,
        ): void;
        startMessages(): void;
    }
    Hierarchy

    Properties

    controller oncontrollerchange onmessage onmessageerror ready

    Methods

    addEventListener dispatchEvent getRegistration getRegistrations register removeEventListener startMessages

    Properties

    Readonlycontroller

    controller: ServiceWorker

    MDN Reference

    oncontrollerchange

    oncontrollerchange: (this: ServiceWorkerContainer, ev: Event) => any

    MDN Reference

    onmessage

    onmessage: (this: ServiceWorkerContainer, ev: MessageEvent) => any

    MDN Reference

    onmessageerror

    onmessageerror: (this: ServiceWorkerContainer, ev: MessageEvent) => any

    MDN Reference

    Readonlyready

    ready: Promise<ServiceWorkerRegistration>

    MDN Reference

    Methods

    addEventListener

    • addEventListener<K extends keyof ServiceWorkerContainerEventMap>(
          type: K,
          listener: (
              this: ServiceWorkerContainer,
              ev: ServiceWorkerContainerEventMap[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

      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

    getRegistration

    getRegistrations

    register

    removeEventListener

    startMessages

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