The WakeLockSentinel object has a new attribute called `released` that indicates whether a sentinel has already been released. Its value is initially false, and it changes to true once a "release" event is dispatched.


The new attribute helps web developers know when a lock has been released so that they do not need to keep track of them manually. See for the original discussion.


Editor's draft

Status in Chromium


Enabled by default (tracking bug) in:

  • Chrome for desktop release 87
  • Chrome for Android release 87
  • Android WebView release 87

Consensus & Standardization

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

  • No signal
  • No signal
  • No signal
  • No signals


Last updated on 2021-06-19