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Dataset 20260827-2142-2f1b575 · measured 2026-08-27 21:42 UTC
text-decoration-line
✕parsed, no effectcss-text-decor-4
The parser accepts the name, yet our rendering is byte-identical with and without the declaration while Chrome's is not. The declaration is being swallowed.
What the specification says
- Initial value
- none
- Applies to
- all elements
- Inherited
- no (but see prose, above)
- Percentages
- n/a
- Computed value
- specified keyword(s)
- Syntax
- none | [ underline || overline || line-through || blink ] | spelling-error | grammar-error
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.
text-decoration-line:overline✕renders differently
Our renderChrome6,825 pixels differ from Chrome, the largest by 204 of 255 on one channel.
- Differing pixels
- 6,825
- Max channel delta
- 204
text-decoration-line:line-through✕renders differently
Our renderChrome7,024 pixels differ from Chrome, the largest by 187 of 255 on one channel.
- Differing pixels
- 7,024
- Max channel delta
- 187
text-decoration-line:spelling-error✕parsed, no effect
Our renderChrome2,046 pixels differ from Chrome, the largest by 178 of 255 on one channel.
- Differing pixels
- 2,046
- Max channel delta
- 178
text-decoration-line:grammar-error✕parsed, no effect
Our renderChrome1,834 pixels differ from Chrome, the largest by 76 of 255 on one channel.
- Differing pixels
- 1,834
- Max channel delta
- 76
text-decoration-line:underline✓pixel-exact
Our renderChrome1,402 pixels differ from Chrome, the largest by 45 of 255 on one channel.
- Differing pixels
- 1,402
- Max channel delta
- 45
Which values were measured
“Supported” on one example means “supported at the value we tried”. The property’s declared grammar has 7 branches; 5 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 |
|---|---|
| underline | ✓pixel-exact |
| overline | ✕renders differently |
| line-through | ✕renders differently |
| blink | not measured |
| spelling-error | ✕parsed, no effect |
| grammar-error | ✕parsed, no effect |
| none | not measured |
Tests in the suite that name this property
Secondary evidence: 11 Web Platform Tests carry a spec anchor pointing at this property. Only 1,254 tests in the whole corpus carry such an anchor, so an empty list here means nothing at all.
✓css/css-text-decor/line-through-vertical.html✓css/css-text-decor/text-decoration-line-010.xht✓css/css-text-decor/text-decoration-line-011.xht✓css/css-text-decor/text-decoration-line-012.xht✓css/css-text-decor/text-decoration-line-013.xht–css/css-text-decor/text-decoration-line-recalc.html✕css/css-text-decor/text-decoration-line-through-wavy-covers-whole-line-length-001.html✓css/css-text-decor/text-decoration-line.html–css/css-text-decor/text-decoration-lines-001.html✕css/css-text-decor/text-decoration-overline-wavy-covers-whole-line-length-001.html✕css/css-text-decor/text-decoration-underline-wavy-covers-whole-line-length-001.html
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