Bug 237225

Summary:	Setting document.documentElement.scrollTop has unexpected result (when zoomed out)
Product:	WebKit	Reporter:	receter
Component:	WebKit Misc.	Assignee:	Nobody <webkit-unassigned>
Status:	NEW ---
Severity:	Normal	CC:	receter, rik, simon.fraser, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	Safari 15
Hardware:	Unspecified
OS:	macOS 12

Description receter 2022-02-25 13:47:03 PST

Steps to reproduce:

1. Open any page in Safari (15) and zoom out one step (cmd -)
2. Open console and set document.documentElement.scrollTop = 10
3. Read the same value document.documentElement.scrollTop
4. It is 9 instead of 10

Console output:

> document.documentElement.scrollTop = 10
< 10
> document.documentElement.scrollTop
< 9

Comment 1 Radar WebKit Bug Importer 2022-03-04 13:47:16 PST

<rdar://problem/89832500>

Comment 2 receter 2023-06-02 01:29:55 PDT

https://github.com/jackmoore/autosize/issues/396

Comment 3 Anthony Ricaud 2023-12-20 08:55:53 PST

The autosize library is used by Gitlab which is therefore affected: https://gitlab.com/gitlab-org/gitlab/-/issues/31082