Web platform features explorer - rex unit

Web platform features explorer

Tags: css Groups: CSS > Units

The rex CSS length unit is a font-relative length that is equal to the x-height of the root element.

Learning resources on MDN

Rex, in <length>

Browser support

Chrome 111 Released on 2023-03-07
Chrome Android 111 Released on 2023-03-07
Edge 111 Released on 2023-03-13
Firefox ❌
Firefox for Android ❌
Safari 17.2 Released on 2023-12-11
Safari on iOS 17.2 Released on 2023-12-11

Baseline availability blocked since December 2023 by Firefox (14 months)

Specifications

CSS Values and Units Module Level 4 (#font-relative-lengths), from Cascading Style Sheets (CSS) Working Group (W3C).

View web-platform-tests results for this feature - View the feature source file - Edit the feature - Report an issue about this feature