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Dataset 20261011-0550-f160c57 · measured 2026-10-11 05:50 UTC
-webkit-mask-box-image
–not implemented0 of 12 examples match Chromecompat
The engine's CSS parser does not know this property name, so the declaration is dropped where it is read.
What the specification says
- Syntax
- <'mask-border-source'> || <'mask-border-slice'> [ / <'mask-border-width'>? [ / <'mask-border-outset'> ]? ]? || <'mask-border-repeat'> || <'mask-border-mode'>
The measurements
12 examples, 0 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.
-webkit-mask-box-image:linear-gradient(90deg,#f00,#00f)–not implemented
Our renderChrome54,836 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 54,836
- Max channel delta
- 204
-webkit-mask-box-image:2–not implemented
Our renderChrome5,782 pixels differ from Chrome, the largest by 3 of 255 on one channel.
- Differing pixels
- 5,782
- Max channel delta
- 3
-webkit-mask-box-image:50%–not implementedOur renderChrome5,782 pixels differ from Chrome, the largest by 3 of 255 on one channel.
- Differing pixels
- 5,782
- Max channel delta
- 3
-webkit-mask-box-image:2 fill–not implementedOur renderChrome5,782 pixels differ from Chrome, the largest by 3 of 255 on one channel.
- Differing pixels
- 5,782
- Max channel delta
- 3
-webkit-mask-box-image:2 / 20px–not implementedOur renderChrome5,782 pixels differ from Chrome, the largest by 3 of 255 on one channel.
- Differing pixels
- 5,782
- Max channel delta
- 3
-webkit-mask-box-image:2 / 50%–not implemented
Our renderChrome5,782 pixels differ from Chrome, the largest by 3 of 255 on one channel.
- Differing pixels
- 5,782
- Max channel delta
- 3
-webkit-mask-box-image:2 / 2–not implementedOur renderChrome5,782 pixels differ from Chrome, the largest by 3 of 255 on one channel.
- Differing pixels
- 5,782
- Max channel delta
- 3
-webkit-mask-box-image:2 / auto–not implementedOur renderChrome5,782 pixels differ from Chrome, the largest by 3 of 255 on one channel.
- Differing pixels
- 5,782
- Max channel delta
- 3
-webkit-mask-box-image:2 / / 20px–not implementedOur renderChrome5,782 pixels differ from Chrome, the largest by 3 of 255 on one channel.
- Differing pixels
- 5,782
- Max channel delta
- 3
-webkit-mask-box-image:2 / / 2–not implemented
Our renderChrome5,782 pixels differ from Chrome, the largest by 3 of 255 on one channel.
- Differing pixels
- 5,782
- Max channel delta
- 3
-webkit-mask-box-image:stretch–not implementedOur renderChrome5,782 pixels differ from Chrome, the largest by 3 of 255 on one channel.
- Differing pixels
- 5,782
- Max channel delta
- 3
-webkit-mask-box-image:repeat–not implementedOur renderChrome5,782 pixels differ from Chrome, the largest by 3 of 255 on one channel.
- Differing pixels
- 5,782
- Max channel delta
- 3
Which values were measured
“Supported” on one example means “supported at the value we tried”. The property’s declared grammar has 18 branches; 12 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 |
|---|---|
| linear-gradient(90deg,#f00,#00f) | –not implemented |
| 2 | –not implemented |
| 50% | –not implemented |
| 2 fill | –not implemented |
| 2 / | not measured |
| 2 / 20px | –not implemented |
| 2 / 50% | –not implemented |
| 2 / 2 | –not implemented |
| 2 / auto | –not implemented |
| 2 / / 20px | –not implemented |
| 2 / / 2 | –not implemented |
| stretch | –not implemented |
| repeat | –not implemented |
| round | not measured |
| space | not measured |
| luminance | not measured |
| alpha | not measured |
| none | not measured |
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