High Resolution Time Stamp for Events

Change Event.timeStamp to be a DOMHighResTimeStamp which is a high resolution monotonic time with microseconds resolution instead DOMTimeStamp which is an epoch time with millisecond resolution. For input events, the timestamp value will represent the underlying OS timestamp for the event. High resolution monotonic timestamp for input events enables new functionality such as accurate measurement of pointer velocity, simple input latency measurements, and etc.

Demos

• https://googlechrome.github.io/samples/event-timestamp/index.html
• http://rbyers.net/scroll-latency.html

Documentation

• https://github.com/whatwg/dom/issues/23
• https://lists.w3.org/Archives/Public/public-whatwg-archive/2014May/0055.html

Specification

Working draft or equivalent

Status in Chromium

Blink components: Blink

Enabled by default (tracking bug) in:

• Chrome for desktop release 49
• Chrome for Android release 49
• Chrome for iOS release 49

Consensus & Standardization

• Firefox: Shipped
• Edge: No public signals
• Safari: Mixed public signals
• Web Developers: Mixed signals

Owners

• majidvp@chromium.org
• rbyers@chromium.org

Last updated on 2017-07-17