Bug 303419

Summary:	grid-lanes should place items immediately after previous, even if negative margins move it up
Product:	WebKit	Reporter:	fantasai <fantasai.bugs>
Component:	Layout and Rendering	Assignee:	fantasai <fantasai.bugs>
Status:	RESOLVED FIXED
Severity:	Normal	CC:	bfulgham, brandonstewart, simon.fraser, webkit-bug-importer, zalan
Priority:	P2	Keywords:	InRadar
Version:	WebKit Local Build
Hardware:	Unspecified
OS:	Unspecified

fantasai

Reported 2025-12-02 14:06:28 PST

We are currently updating the running position to the max of the current running position and the end of the newly placed item, but if the margin is sufficiently negative then this gives the wrong result. We should just take the end of the newly placed item as the new running position.

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Radar WebKit Bug Importer

Comment 1 2025-12-02 14:06:41 PST

<rdar://problem/165718130>

fantasai

Comment 2 2025-12-02 14:14:18 PST

Pull request: https://github.com/WebKit/WebKit/pull/54721

EWS

Comment 3 2025-12-02 23:50:36 PST

Committed 303813@main (74f3bc40b449): <https://commits.webkit.org/303813@main> Reviewed commits have been landed. Closing PR #54721 and removing active labels.

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