While scrolling via trackpad or mousewheel, we previously sent mouse position updates every 100ms. On pages with heavy mouse handlers or :hover styles, this could cause significant amounts of scroll jank. Sending a mouse position update includes updating :hover styles, and dispatching mousemove, mouseover, mouseenter, mouseleave, and mouseout events. We’re planning to stop sending mouse position updates while scrolling. Instead, we'll trigger this behavior 100ms after scrolling ends.
Documentation
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
- Shipped/Shipping
- No signals
Owner
Search tags
scroll, hover, mouse,Last updated on 2020-11-09
Comments
Here's an example of a user facing behavior change, using the jQuery UI tooltip (http://output.jsbin.com/teyinu/1/quiet). To see the behavior difference, place the mouse cursor over the red box, then scroll via mouse wheel or trackpad. Without this change, every 100ms, the tooltip moves to the location of the cursor. With this change, the tooltip only moves once scrolling is complete.