The addition of the 'type' member will allow passing in parameters specific to one entry type when calling observe() within PerformanceObserver. Right now, 'entryTypes' is used to specify potentially multiple entry types to be observed at the same time. An observer can only use 'entryTypes' or 'type'. An observer can only specify additional parameters when using 'type'. An observer can still observe multiple entry types by calling observe() with 'type' multiple times.



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
  • Positive
  • Positive


Last updated on 2021-12-13