/Web APIs


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

The PeriodicSyncManager interface of the Web Periodic Background Synchronization API provides a way to register tasks to be run in a service worker at periodic intervals with network connectivity. These tasks are referred to as periodic background sync requests. Access PeriodicSyncManager through the ServiceWorkerRegistration.periodicSync.

Instance properties


Instance methods

PeriodicSyncManager.register Experimental

Registers a periodic sync request with the browser with the specified tag and options. Returns a Promise that resolves when the registration completes.

PeriodicSyncManager.getTags Experimental

Returns a Promise that resolves with a list of strings representing the tags that are currently registered for periodic syncing.

PeriodicSyncManager.unregister Experimental

Unregisters the periodic sync request corresponding to the specified tag and returns a Promise that resolves when unregistration completes.


The following examples show how to use the interface.

Requesting a Periodic Background Sync

The following asynchronous function registers a periodic background sync at a minimum interval of one day from a browsing context:

async function registerPeriodicNewsCheck() {
  const registration = await navigator.serviceWorker.ready;
  try {
    await registration.periodicSync.register("get-latest-news", {
      minInterval: 24 * 60 * 60 * 1000,
  } catch {
    console.log("Periodic Sync could not be registered!");

Verifying a Background Periodic Sync by Tag

This code checks to see if a Periodic Background Sync task with a given tag is registered.

navigator.serviceWorker.ready.then((registration) => {
  registration.periodicSync.getTags().then((tags) => {
    if (tags.includes("get-latest-news")) skipDownloadingLatestNewsOnPageLoad();

Removing a Periodic Background Sync Task

The following code removes a Periodic Background Sync task to stop articles syncing in the background.

navigator.serviceWorker.ready.then((registration) => {


Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
PeriodicSyncManager 80 80 No No 67 No No 80 No 57 No 13.0
getTags 80 80 No No 67 No No 80 No 57 No 13.0
register 80 80 No No 67 No No 80 No 57 No 13.0
unregister 80 80 No No 67 No No 80 No 57 No 13.0

See also

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