Background sync

The background synchronization API registers a service worker callback to run only when the device is no longer offline. You can use this to let users continue using your app while offline and synchronize with a server after reconnecting.

Baseline Status: This feature is currently Limited and is missing in at least one major browser engine.

Desktop Browser Engine Support

Google Chrome

49

Supported

Mozilla Firefox

—

Unsupported

Apple Safari

—

Unsupported

Microsoft Edge

79

Supported

Mobile Browser Engine Support

Chrome Android

49

Firefox Android

—

Safari iOS

—

Specifications and References

Specification ↗ Feature XML ↗

MDN Browser Compat Data Keys:

api.Permissions.permission_background-sync ↗ api.ServiceWorkerGlobalScope.sync_event ↗ api.ServiceWorkerRegistration.sync ↗ api.SyncEvent ↗ api.SyncEvent.SyncEvent ↗ api.SyncEvent.lastChance ↗ api.SyncEvent.tag ↗ api.SyncManager ↗ api.SyncManager.getTags ↗ api.SyncManager.register ↗ api.SyncManager.worker_support ↗