Web/API/ServiceWorkerRegistration/periodicSync

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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.

Syntax

var PeriodicSyncManagerObject = ServiceWorkerRegistration.periodicSync;

Value

A PeriodicSyncManager Object.

Examples

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;

Specifications

Specification	Status	Comment
Web Periodic Background SynchronizationThe definition of 'periodicSync' in that specification.	Working Draft	Initial definition.

Browser compatibility

Update compatibility data on GitHub

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet
`periodicSync` Experimental'Non-standard'	Chrome Full support 80	Edge Full support 80	Firefox No support No	IE No support No	Opera No support No	Safari No support No	WebView Android Full support 80	Chrome Android Full support 80	Firefox Android No support No	Opera Android No support No	Safari iOS No support No	Samsung Internet Android Full support 13.0

Legend

Full support: Full support
No support: No support
Experimental. Expect behavior to change in the future.': Experimental. Expect behavior to change in the future.
Non-standard. Expect poor cross-browser support.': Non-standard. Expect poor cross-browser support.