Bug 311249

Summary:

fieldset + display: grid is broken

Product:

WebKit

Reporter:

Alex <alexander>

Component:

Layout and Rendering

Assignee:

alan <zalan>

Status:

RESOLVED FIXED

Severity:

Normal

CC:

bfulgham, karlcow, koivisto, sgill26, simon.fraser, webkit-bug-importer, zalan

Priority:

Keywords:

InRadar

Version:

Safari 26

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Screen recording	none
rendering in safari, firefox, chrome	none
[fast-cq]Patch	none

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	Details Formatted Diff Diff
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].

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