Method unsubscribe

packages/service-worker/src/push.ts:262–293

* Unsubscribes from Service Worker push notifications. * * @returns A Promise that is resolved when the operation succeeds, or is rejected if there is no * active subscription or the unsubscribe operation fails.

()

   *          active subscription or the unsubscribe operation fails.
   */
  unsubscribe(): Promise<void> {
    if (!this.sw.isEnabled) {
      return Promise.reject(new Error(ERR_SW_NOT_SUPPORTED));
    }

    const doUnsubscribe = (sub: PushSubscription | null) => {
      if (sub === null) {
        throw new RuntimeError(
          RuntimeErrorCode.NOT_SUBSCRIBED_TO_PUSH_NOTIFICATIONS,
          (typeof ngDevMode === 'undefined' || ngDevMode) &&
            'Not subscribed to push notifications.',
        );
      }

      return sub.unsubscribe().then((success) => {
        if (!success) {
          throw new RuntimeError(
            RuntimeErrorCode.PUSH_SUBSCRIPTION_UNSUBSCRIBE_FAILED,
            (typeof ngDevMode === 'undefined' || ngDevMode) && 'Unsubscribe failed!',
          );
        }

        this.subscriptionChanges.next(null);
      });
    };

    return new Promise((resolve, reject) => {
      this.subscription
        .pipe(take(1), switchMap(doUnsubscribe))
        .subscribe({next: resolve, error: reject});
    });
  }

  private decodeBase64(input: string): string {
    return atob(input);