RESOLVED CONFIGURATION CHANGED Bug 274408
Textarea jumps/disappears when scrollbars appear. 
https://bugs.webkit.org/show_bug.cgi?id=274408
Summary Textarea jumps/disappears when scrollbars appear.
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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