This feature is non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

The SyncRegistration interface of the the ServiceWorker API provides an object for managing background synchronization.


SyncRegistration.tagRead only
Provides the unique identifier of the specified SyncRegistration object.


Returns a Promise that resolves to Boolean indicating whether the SyncRegistration object was unregistered.


// TBD

Browser compatibility

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support Not supported ? ? ? ?
Feature Android Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support Not supported ? ? ? ? ? Not supported

Document Tags and Contributors

 Contributors to this page: jpmedley, Alpesh, Bdmoittry
 Last updated by: jpmedley,