Web Platform Baseline Status Breakdown
Total Features: 1219
Categories:
All
CSS (6)
Text (4)
Units (4)
Workers (3)
Color types (2)
Container queries (2)
JavaScript (2)
JavaScript modules (2)
Reporting (2)
Selectors (2)
Streams (2)
WebAssembly (2)
Animation (1)
Clipping, shapes, and masking (1)
Explicit defaults (1)
HTML (1)
Image scaling (1)
Internationalization (1)
Iterators (1)
Maps (1)
MathML (1)
Scrolling (1)
Security (1)
View transitions (1)
2026
4 features
• January 2026
The rcap CSS length unit is a font-relative length equal to the value of the cap unit on the root element. Cap-height is approximately equal to the height of a capital Latin letter.
Chrome
118
Firefox
147
Safari
17.2
Edge
118
Baseline Date: Jan 13, 2026
The rch CSS length unit is a font-relative length equal to the value of the ch unit on the root element. ch length is based on the width of the zero (0) character.
Chrome
111
Firefox
147
Safari
17.2
Edge
111
Baseline Date: Jan 13, 2026
The rex CSS length unit is a font-relative length that is equal to the x-height of the root element.
Chrome
111
Firefox
147
Safari
17.2
Edge
111
Baseline Date: Jan 13, 2026