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Dataset 20260827-2142-2f1b575 · measured 2026-08-27 21:42 UTC
border-start-start-radius
–not implementedcss-borders-4
The engine's CSS parser does not know this property name, so the declaration is dropped where it is read.
What the specification says
- Initial value
- 0
- Applies to
- all elements (but see prose)
- Inherited
- no
- Percentages
- Refer to corresponding dimension of the border box.
- Computed value
- pair of computed <length-percentage> values
- Syntax
- <border-radius>
The measurements
Each example is one declaration on a small page, drawn by Chrome and by our engine. Drag the handle to wipe between them.
border-start-start-radius:30px–not implemented
Our renderChrome253 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 253
- Max channel delta
- 204
border-start-start-radius:30px 10px–not implemented
Our renderChrome71 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 71
- Max channel delta
- 204
Which values were measured
“Supported” on one example means “supported at the value we tried”. The property’s declared grammar has 3 branches; 2 of them carry a measurement. The publishing ceiling is 12 examples per property — a branch past it is left out by our choice, not by accident.
| Value | Measured |
|---|---|
| 30px | –not implemented |
| 30px 10px | –not implemented |
| 30px / 10px | not measured |
Measured against Chrome 148.0.7778.96 on 2026-08-27, with up to 40 candidate values tried per property. All properties · How the measurement works