ServiceWorkerRegistration.periodicSync

The periodicSync read-only property of the ServiceWorkerRegistration interface returns a reference to the PeriodicSyncManager interface, which allows for registering of tasks to run at specific intervals.

A PeriodicSyncManager Object.

You can access the property from either your main script or the registered service worker.

Here is an example from the main script:

// reference registration
const registration = await navigator.serviceWorker.ready;

// feature detection
if ('periodicSync' in registration) {

  // Background Periodic Sync functionality
  const periodicSync = registration.periodicSync;

}

From the service worker:

// service worker script

const periodicSync = self.registration.periodicSync;

• Richer offline experiences with the Periodic Background Sync API
• A Periodic Background Sync demo app