To conform to the specification, ExtendableEvent.waitUntil() and FetchEvent.respondWith() can now be called during the microtask checkpoint at the end of event dispatch. Previously, this would throw an InvalidStateError.


Editor's draft

Status in Chromium


Enabled by default in:

  • Chrome for desktop release 75
  • Chrome for Android release 75
  • Android WebView release 75

Consensus & Standardization

After a feature ships in Chrome, the values listed here are not guaranteed to be up to date.


Search tags

service, serviceworker, worker, event, dispatch, microtask, respondWith, waitUntil,

Last updated on 2020-11-09