Do not apply hover when mouse does not move

CSS

To update the hover state when a page scrolls or changes layout, Blink currently dispatches fake mouse moves based on a timer because the mouse does not move. Unfortunately, every mouse move does a hit test which affects both performance and testing. This change applies the hover effect only when a mouse physically moves, improving performance and eliminating issues created by fake mouse events.

Demo

https://output.jsbin.com/cekolep/quiet/

Status in Chromium

Blink components: Blink

Enabled by default (tracking bug) in:

Chrome for desktop release 77

Consensus & Standardization

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

Firefox: Opposed
Edge: Shipped
Safari: Opposed
Web Developers: No signals

Owner

lanwei@chromium.org

Last updated on 2020-01-08