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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

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!

Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari (WebKit)
Basic support No support ? ? ? ?
Feature Android Firefox Mobile (Gecko) Firefox OS IE Mobile Opera Mobile Safari Mobile Chrome for Android
Basic support No support ? ? ? ? ? No support

Document Tags and Contributors

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