PerformanceResourceTiming.workerStart attribute allows developers to instrument and measure ServiceWorker startup time.


Specification link

Specification currently under development in a Working 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.

  • Shipped/Shipping
  • No signal
  • No signals


Search tags

Resource Timing, Service Worker,

Last updated on 2020-11-09