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.


Specification link

Specification being incubated in a Community Group

Status in Chromium


Enabled by default (tracking bug)

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 signals


Last updated on 2021-12-13