The PerformanceEventTiming interface provides timing information about the latency of the first discrete user interaction, specifically one of key down, mouse down, click, a pointer down followed by a pointer up. (Pointer down may be the start of scrolling, which is not tracked.) This is a subset of the EventTiming API, but will be exposed in advance because it provides key metrics to help measure and optimize responsiveness.

Specification

Specification link


Specification being incubated in a Community Group

Status in Chromium

Blink


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.

Owners

Last updated on 2021-03-12