Bug 319381

Summary:

[css-anchor-position] scroll adjustments to anchored box don't account for transforms

Product:

WebKit

Reporter:

David Shin <dshin>

Component:

Layout and Rendering

Assignee:

fantasai <fantasai.bugs>

Status:

NEW

Severity:

Normal

CC:

bfulgham, emilio, fantasai.bugs, karlcow, kiet.ho, mordechai112, simon.fraser, webkit-bug-importer, zalan

Priority:

Keywords:

InRadar

Version:

Safari Technology Preview

Hardware:

Unspecified

OS:

Unspecified

Bug Depends on:

Bug Blocks:

291856

Attachments:

Description	Flags
Minimum Reproducible Case	none

David Shin

Reported 2026-07-14 08:16:29 PDT

Created attachment 480577 [details] Minimum Reproducible Case STR: 1. Launch attached testcase (Tested on `Version 151.0.7883.0 (Official Build) canary (64-bit)`) 2. Scroll up and down Expected: Anchor positioned element (The purple square) should not "detach" from the anchor element (The pink square) Actual: The positioned element detaches from the anchor element when the scroller moves down, seemingly scrolling at a different rate from the anchor element.

Attachments
Minimum Reproducible Case (693 bytes, text/html) 2026-07-14 08:16 PDT, David Shin	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Radar WebKit Bug Importer

Comment 1 2026-07-14 10:50:13 PDT

<rdar://problem/182219060>

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