Loading…
Dataset 20261011-0550-f160c57 · measured 2026-10-11 05:50 UTC
mask-origin
◐matches Chrome on some values2 of 3 examples match Chromecss-masking-1
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: 2 of 3 examples match Chrome. The one that does not: mask-origin:padding-box — shown first below, each with its difference map.
What the specification says
- Initial value
- border-box
- Applies to
- All elements. In SVG, it applies to container elements excluding the defs element, all graphics elements and the use element
- Inherited
- no
- Percentages
- n/a
- Computed value
- list, each item the keyword as specified
- Syntax
- <coord-box>#
The measurements
3 examples, 2 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.
mask-origin:padding-box✕renders differently
Our renderChrome6,132 pixels differ from Chrome, the largest by 37 of 255 on one channel.
- Differing pixels
- 6,132
- Max channel delta
- 37
mask-origin:content-box≈below the visible threshold
Our renderChrome5,890 pixels differ from Chrome, the largest by 3 of 255 on one channel.
- Differing pixels
- 5,890
- Max channel delta
- 3
mask-origin:fill-box≈below the visible threshold
Our renderChrome5,890 pixels differ from Chrome, the largest by 3 of 255 on one channel.
- Differing pixels
- 5,890
- 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 6 branches; 3 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 |
|---|---|
| content-box | ≈below the visible threshold |
| padding-box | ✕renders differently |
| fill-box | ≈below the visible threshold |
| stroke-box | not measured |
| view-box | not measured |
| border-box | 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