rex unit
The rex CSS length unit is a font-relative length that is equal to the x-height of the root element.
Status
Baseline Newly Available (since 2026-01-13)
This feature is expected to reach Baseline Widely Available status on: 2028-07-13
MDN documentation
Specifications
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 147 Released on 2026-01-13
- Firefox for Android 147 Released on 2026-01-13
- Safari 17.2 Released on 2023-12-11
- Safari on iOS 17.2 Released on 2023-12-11
Web Platform Tests (WPT)
View the latest WPT test results for this featureDeveloper signals
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