Bug 274408

Summary:

Textarea jumps/disappears when scrollbars appear.

Product:

WebKit

Reporter:

Neil <fraser>

Component:

Layout and Rendering

Assignee:

Nobody <webkit-unassigned>

Status:

RESOLVED CONFIGURATION CHANGED

Severity:

Normal

CC:

ahmad.saleem792, bfulgham, cpcallen, karlcow, nmouchtaris, sabouhallawa, simon.fraser, webkit-bug-importer, zalan, zimmermann

Priority:

Keywords:

BrowserCompat, InRadar

Version:

Safari 17

Hardware:

Mac (Apple Silicon)

OS:

macOS 14

Attachments:

Description	Flags
Minimal test case	none
Screenshot of inspector after textarea has jumped.	none

Neil

Reported 2024-05-20 12:11:37 PDT

Created attachment 471451 [details] Minimal test case If OSX is configured using "System Settings > Appearance > Show scroll bars: When scrolling", then textareas in an SVG can jump across the screen and/or disappear when enough text is added that a scrollbar is needed. If the above configuration is set to "Show scroll bars: Always", then the bug disappears. Attached is a minimal test-case. 19 lines of HTML/SVG, no JavaScript or CSS. Just type into the textarea. This bug is unique to Safari. Firefox and Chrome are unaffected. Affects Google's Blockly.

Attachments
Minimal test case (531 bytes, text/html) 2024-05-20 12:11 PDT, Neil	no flags	Details
Screenshot of inspector after textarea has jumped. (471.94 KB, image/png) 2024-05-20 12:14 PDT, Neil	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Neil

Comment 1 2024-05-20 12:14:48 PDT

Created attachment 471452 [details] Screenshot of inspector after textarea has jumped. The screenshot shows the textarea has jumped to the upper-left corner. But the inspector's bounding box lines claim that the textarea is in the expected location.

Alexey Proskuryakov

Comment 2 2024-05-22 10:57:59 PDT

I can reproduce this, really weird behavior. It did simply disappear for me when typing, then reappeared when I resized the window.

Simon Fraser (smfr)

Comment 3 2024-05-22 13:50:08 PDT

Possibly fixed by https://commits.webkit.org/277015@main

Radar WebKit Bug Importer

Comment 4 2024-05-22 23:27:20 PDT

<rdar://problem/128589409>

Ahmad Saleem

Comment 5 2024-05-24 07:28:18 PDT

It seems to be fixed in Safari Technology Preview as well. So it would be now to wait when STP fixes ship in stable release. Keep it open.

Ahmad Saleem

Comment 6 2024-05-24 16:10:09 PDT

Since it is fixed in STP and landed on trunk. Marking it as 'Config Changed'.

Christopher Allen

Comment 7 2024-08-30 09:43:55 PDT

Hello. This bug still exists in Safari 17.6 (19618.3.11.11.5) on macOS 14.6.1. When might we expect to see the fix land for users of current and recent versions of macOS?

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