RESOLVED FIXED311249
fieldset + display: grid is broken 
https://bugs.webkit.org/show_bug.cgi?id=311249
Summary fieldset + display: grid is broken
Alex
Reported 2026-04-01 01:04:13 PDT
When display: grid is applied to a fieldset, extra unnecessary space is added to the fieldset below all of its content: https://codepen.io/waterplea/pen/RNGyrVL Works properly everywhere, as usual, except webkit. A reflow will snap the sense into it, I added fieldset:hover { block-size: fit-content } and if you hover it – the size is corrected, but if this style is applied initially it has no effect.
Attachments
Screen recording (1.62 MB, video/quicktime)
2026-04-01 01:12 PDT, Alex 		no flags
Details
rendering in safari, firefox, chrome (312.58 KB, image/png)
2026-04-02 05:37 PDT, Karl Dubost 		no flags
Details
[fast-cq]Patch (9.40 KB, patch)
2026-04-11 12:18 PDT, alan 		no flags
DetailsFormatted DiffDiff
View All Add attachment proposed patch, testcase, etc.
Alex
Comment 1 2026-04-01 01:12:13 PDT
Created attachment 478872 [details] Screen recording Attached screen recording just in case, since a friend of mine said it does not reproduce for him (however it DOES reproduce for him in the actual app where we discovered this issue).
Karl Dubost
Comment 2 2026-04-02 05:37:21 PDT
Created attachment 478902 [details] rendering in safari, firefox, chrome
Radar WebKit Bug Importer
Comment 3 2026-04-08 01:05:11 PDT
<rdar://problem/174301311>
alan
Comment 4 2026-04-11 12:18:35 PDT
Created attachment 479018 [details] [fast-cq]Patch
EWS
Comment 5 2026-04-13 05:19:19 PDT
Committed 311078@main (e60be43b44bb): <https://commits.webkit.org/311078@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 479018 [details].
Note You need to log in before you can comment on or make changes to this bug.