On Monday, August 24, 2026 at 3:35:38 PM UTC+2 [email protected] wrote:

On 8/23/26 9:43 a.m., Helmut Januschka wrote:

*Contact emails*
[email protected]

*Specification*
https://drafts.csswg.org/css-text-decor-4/#propdef-text-decoration-inset

*Summary*
CSS text-decoration-inset controls how far underlines, overlines, and 
line-through decorations are inset from or extended beyond text run edges. 
It supports auto, length, and percentage values, including one-value and 
two-value syntax for setting the start and end offsets. This lets 
developers adjust decoration spacing and create reveal effects with native 
text decorations instead of background gradients or additional elements.  

sampler: https://static.januschka.com/i-468928416/?asddsaasd  


MDN: 
https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/text-decoration-inset
 

CL: https://chromium-review.googlesource.com/c/chromium/src/+/7748204

*Blink component*
Blink>CSS 
<https://issues.chromium.org/issues?q=customfield1222907:%22Blink%3ECSS%22>

*Web Feature ID*
text-decoration <https://webstatus.dev/features/text-decoration>

*Motivation*
This change implements CSS text-decoration-inset (CSS Text Decoration Level 
4), including percentage values. It gives authors direct control over 
decoration inset and reduces the need for wrapper/pseudo-element 
workarounds used to fine-tune underline/overline/line-through rendering. 


*Initial public proposal*
*No information provided*

*TAG review*
*No information provided*

*TAG review status*
Not applicable

*Goals for experimentation*
None

*Risks*


*Interoperability and Compatibility*
*No information provided*

*Gecko*: No signal

*WebKit*: No signal

Can we please request signals?


Mozilla has already shipped support for text-decoration-inset in Firefox 
146, see 
https://developer.mozilla.org/en-US/docs/Mozilla/Firefox/Releases/146#css, 
though they are currently still working on support for percentages.
Safari also recently implemented it in 
https://bugs.webkit.org/show_bug.cgi?id=319178, see also 
https://webkit.org/css-status/?#property-text-decoration-inset 
<https://webkit.org/css-status/#property-text-decoration-inset>. Though, as 
far as I could see, they are also currently lacking support for 
percentages, so I just filed https://bugs.webkit.org/show_bug.cgi?id=322441 for 
that.
Neither Apple nor Mozilla published standards positions for that feature, 
though.

Sebastian

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