MDN’s new design is in Beta! A sneak peek:


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 unregister() method of the SyncRegistration interface returns a Promise that resolves to a  Boolean indicating whether the SyncRegistration object was unregistered.


 SyncRegistration.unregister().then(function(Boolean) { ... }):


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



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, rolfedh
 Last updated by: jpmedley,