Method registerSync

packages/workbox-background-sync/src/Queue.ts:393–409

* Registers a sync event with a tag unique to this instance.

()

   * Registers a sync event with a tag unique to this instance.
   */
  async registerSync(): Promise<void> {
    // See https://github.com/GoogleChrome/workbox/issues/2393
    if ('sync' in self.registration && !this._forceSyncFallback) {
      try {
        await self.registration.sync.register(`${TAG_PREFIX}:${this._name}`);
      } catch (err) {
        // This means the registration failed for some reason, possibly due to
        // the user disabling it.
        if (process.env.NODE_ENV !== 'production') {
          logger.warn(
            `Unable to register sync event for '${this._name}'.`,
            err,
          );
        }
      }
    }
  }

  /**
   * In sync-supporting browsers, this adds a listener for the sync event.