Bug 292266

Summary:

Container Stacking Context Outbreak Bug

Product:

WebKit

Reporter:

marcnetic

Component:

Layout and Rendering

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED DUPLICATE

Severity:

Normal

CC:

bfulgham, simon.fraser, zalan

Priority:

Version:

Safari 18

Hardware:

Unspecified

OS:

Unspecified

URL:

https://codepen.io/marcnetic/pen/QwWQBjX

Attachments:

Description	Flags
Safari merges content	none

marcnetic

Reported 2025-04-29 03:54:46 PDT

Created attachment 475073 [details] Safari merges content If you set via CSS a container inline-size to an element (static positioned) and inside that container element you have a break-out element (like a popover), in Safari the result looks like that popover merge in to the next container. Firefox and Webkit show it correctly in an expected way. Example Code: https://codepen.io/marcnetic/pen/QwWQBjX

Attachments
Safari merges content (97.31 KB, image/png) 2025-04-29 03:54 PDT, marcnetic	no flags	Details
View All Add attachment proposed patch, testcase, etc.

alan

Comment 1 2025-04-29 09:26:02 PDT

This seems to have progressed on trunk. Let me find the progression point.

alan

Comment 2 2025-04-29 10:01:28 PDT

Progressed at https://commits.webkit.org/284730@main ([container-queries] Drop layout containment from container-type)

alan

Comment 3 2025-04-29 10:01:46 PDT

*** This bug has been marked as a duplicate of bug 277122 ***

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