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Dataset 20261011-0550-f160c57 · measured 2026-10-11 05:50 UTC
border-block-start-style
◐matches Chrome on some values6 of 10 examples match Chromecss-borders-4
Some of the examples match Chrome and some do not. The count beside the verdict says how many — 11 of 12 — and the values that differ are listed on the property page. It is neither a pass nor a failure, and filing it under either would be a lie in one direction.
Here: 6 of 10 examples match Chrome. The 4 that do not: border-block-start-style:groove, border-block-start-style:ridge, border-block-start-style:dotted, border-block-start-style:double — shown first below, each with its difference map.
What the specification says
- Initial value
- none
- Applies to
- all elements except ruby base containers and ruby annotation containers
- Inherited
- no
- Percentages
- N/A
- Computed value
- specified keyword
- Syntax
- <line-style>
The measurements
10 examples, 6 of them matching Chrome, the rest first. Each is one declaration on a small page, drawn by Chrome and by our engine. Drag the handle to wipe between them.
border-block-start-style:groove✕renders differently
Our renderChrome14 pixels differ from Chrome, the largest by 13 of 255 on one channel.
- Differing pixels
- 14
- Max channel delta
- 13
border-block-start-style:ridge✕renders differently
Our renderChrome13 pixels differ from Chrome, the largest by 13 of 255 on one channel.
- Differing pixels
- 13
- Max channel delta
- 13
border-block-start-style:dotted✕renders differently
Our renderChrome179 pixels differ from Chrome, the largest by 153 of 255 on one channel.
- Differing pixels
- 179
- Max channel delta
- 153
border-block-start-style:double✕renders differently
Our renderChrome90 pixels differ from Chrome, the largest by 153 of 255 on one channel.
- Differing pixels
- 90
- Max channel delta
- 153
border-block-start-style:hidden✓pixel-exact
Our renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
border-block-start-style:none✓pixel-exactOur renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
border-block-start-style:inset✓pixel-exact
Our renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
border-block-start-style:outset≈below the visible threshold
Our renderChrome14 pixels differ from Chrome, the largest by 2 of 255 on one channel.
- Differing pixels
- 14
- Max channel delta
- 2
border-block-start-style:dashed✓pixel-exact
Our renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
border-block-start-style:solid✓pixel-exact
Our renderChromeIdentical to Chrome: nothing differs, so there is no difference map to show.
- Differing pixels
- 0
- Max channel delta
- 0
Which values were measured
“Supported” on one example means “supported at the value we tried”. The property’s declared grammar has 10 branches; 10 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 |
|---|---|
| hidden | ✓pixel-exact |
| dotted | ✕renders differently |
| dashed | ✓pixel-exact |
| solid | ✓pixel-exact |
| double | ✕renders differently |
| groove | ✕renders differently |
| ridge | ✕renders differently |
| inset | ✓pixel-exact |
| outset | ≈below the visible threshold |
| none | ✓pixel-exact |
Measured against Chrome 148.0.7778.96 on 2026-10-11, with up to 40 candidate values tried per property. All properties · How the measurement works