First Input Timing

The First Input Timing API provides timing information about the latency of the first discrete user interaction, specifically one of key down, mouse down, pointer down followed by pointer up, or click. 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

Editor's draft

Status in Chromium

Blink components: Blink

Enabled by default (tracking bug) in:

Chrome for desktop release 77
Chrome for Android release 77

Consensus & Standardization

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

Firefox: Public support
Edge: Public support
Safari: Mixed public signals
Web Developers: Positive

Owners

npm@chromium.org
tdresser@chromium.org

Last updated on 2019-06-21