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Dataset 20260827-2142-2f1b575 · measured 2026-08-27 21:42 UTC
offset-anchor
–not implementedmotion-1
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
- auto
- Applies to
- transformable elements
- Inherited
- no
- Percentages
- relative to the width and the height of the element’s reference box
- Computed value
- the auto keyword or a computed <position>
- Syntax
- auto | <position>
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.
offset-anchor:left top–not implemented
Our renderChrome19,200 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 19,200
- Max channel delta
- 204
offset-anchor:20px top–not implemented
Our renderChrome16,000 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 16,000
- Max channel delta
- 204
offset-anchor:left 20px–not implemented
Our renderChrome12,000 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 12,000
- Max channel delta
- 204
offset-anchor:left 20px top 20px–not implemented
Our renderChrome8,000 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 8,000
- Max channel delta
- 204
offset-anchor:left bottom–not implemented
Our renderChrome25,600 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 25,600
- Max channel delta
- 204
offset-anchor:left–not implemented
Our renderChrome12,000 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 12,000
- Max channel delta
- 204
offset-anchor:top–not implemented
Our renderChrome24,000 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 24,000
- Max channel delta
- 204
offset-anchor:center top–not implementedOur renderChrome24,000 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 24,000
- Max channel delta
- 204
offset-anchor:right top–not implemented
Our renderChrome28,000 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 28,000
- Max channel delta
- 204
offset-anchor:left center–not implementedOur renderChrome12,000 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 12,000
- Max channel delta
- 204
offset-anchor:50% top–not implementedOur renderChrome24,000 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 24,000
- Max channel delta
- 204
offset-anchor:left 50%–not implementedOur renderChrome12,000 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 12,000
- 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 54 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 |
|---|---|
| left | –not implemented |
| center | not measured |
| right | not measured |
| top | –not implemented |
| bottom | not measured |
| x-start | not measured |
| x-end | not measured |
| y-start | not measured |
| y-end | not measured |
| block-start | not measured |
| block-end | not measured |
| inline-start | not measured |
| inline-end | not measured |
| 20px | not measured |
| 50% | not measured |
| left top | –not implemented |
| center top | –not implemented |
| right top | –not implemented |
| x-start top | not measured |
| x-end top | not measured |
| left center | –not implemented |
| left bottom | –not implemented |
| left y-start | not measured |
| left y-end | not measured |
| 20px top | –not implemented |
| 50% top | –not implemented |
| left 20px | –not implemented |
| left 50% | –not implemented |
| block-start inline-start | not measured |
| center inline-start | not measured |
| block-end inline-start | not measured |
| block-start center | not measured |
| block-start inline-end | not measured |
| start start | not measured |
| center center | not measured |
| end end | not measured |
| left 20px top 20px | –not implemented |
| right 20px top 20px | not measured |
| x-start 20px top 20px | not measured |
| x-end 20px top 20px | not measured |
| left 50% top 20px | not measured |
| left 20px bottom 20px | not measured |
| left 20px y-start 20px | not measured |
| left 20px y-end 20px | not measured |
| left 20px top 50% | not measured |
| block-start 20px inline-start 20px | not measured |
| block-end 20px inline-start 20px | not measured |
| block-start 50% inline-start 20px | not measured |
| block-start 20px inline-end 20px | not measured |
| block-start 20px inline-start 50% | not measured |
| start 20px start 20px | not measured |
| end 20px end 20px | not measured |
| start 50% start 50% | not measured |
| auto | 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