ServiceWorkerRegistration: periodicSync property

Experimental: This is an experimental technology
Check the Browser compatibility table carefully before using this in production.

Secure context: This feature is available only in secure contexts (HTTPS), in some or all supporting browsers.

Note: This feature is available in Web Workers.

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.



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;


Web Periodic Background Synchronization
# dom-serviceworkerregistration-periodicsync

Browser compatibility

BCD tables only load in the browser

See also