rex unit
Limited availability
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
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 (13 months)