ServiceWorkerRegistration.periodicSync - Web APIs 编辑

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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

Browser compatibility

BCD tables only load in the browser

See also

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