Bug 284619

Summary:	[css-anchor-position-1] Fix anchor-center alignment corner case
Product:	WebKit	Reporter:	Pawel Lampe <plampe>
Component:	CSS	Assignee:	Pawel Lampe <plampe>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	fantasai.bugs, koivisto, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	WebKit Nightly Build
Hardware:	Unspecified
OS:	Unspecified
See Also:	https://bugs.webkit.org/show_bug.cgi?id=275451

Pawel Lampe

Reported 2024-12-13 02:16:09 PST

When anchor target has a width: auto, the width is calculated wrong way due to inset properties evaluating to 0 (following the spec) in case of anchor positioning.

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Pawel Lampe

Comment 1 2024-12-13 06:34:17 PST

Actually, I'm not 100% sure if this wrong. I'll try to check this with some spec experts.

Radar WebKit Bug Importer

Comment 2 2024-12-20 02:17:15 PST

<rdar://problem/141812145>

Pawel Lampe

Comment 3 2025-01-06 04:08:01 PST

I've confirmed that this indeed is a bug as alignment values other than 'normal' and 'stretch' use shrink-to-fit sizing for absolutely positioned items

Pawel Lampe

Comment 4 2025-01-06 10:57:38 PST

Pull request: https://github.com/WebKit/WebKit/pull/37901

fantasai

Comment 5 2025-03-03 13:22:30 PST

This should be fixed by https://github.com/WebKit/WebKit/pull/41603

Pawel Lampe

Comment 6 2025-03-04 01:33:36 PST

Confirmed - this is fixed with https://github.com/WebKit/WebKit/pull/41603

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