NEW 218704
Safari Web Extension: Browser action popover with height >=441px glitches 
https://bugs.webkit.org/show_bug.cgi?id=218704
Summary Safari Web Extension: Browser action popover with height >=441px glitches
Rustem
Reported 2020-11-09 06:02:46 PST
Created attachment 413580 [details] Reproducable Xcode project Safari Web Extension in Safari 14: Elements in the bottom of big popover (>=441px height) behave strange. For example when I hover on such element the focus style and cursor constantly blink, it seems as if I move mouse really fast over element up down. This not happen for elements located before this threshold (above 441px height). Check video https://share.getcloudapp.com/qGuvddqj . I also attached reproducable Xcode project. I also noticed that something strange happening with layout recalculation in browser_action popovers. When you try to use libraries like react-textarea-autosize (auto resize textarea elements) - they work really slow, especially if you have more than one on a page. If I check Performance tab in Developer tools there 46% and 43% of processing time spend on Layout and Styles respectively. I suppose hover behaviour and layout recalculation problems I mentioned have something in common, so I decided to put them in one ticket.
Attachments
Reproducable Xcode project (246.57 KB, application/zip)
2020-11-09 06:02 PST, Rustem 		no flags
Details
Screen flickering doesnt happen in fullscreen mode (7.28 MB, video/mp4)
2021-08-01 00:54 PDT, Rustem 		no flags
Details
View All Add attachment proposed patch, testcase, etc.
Rustem
Comment 1 2020-11-09 06:05:07 PST
This may looks like a minor bug, but in real app when it have many elements everything feel junky. This bug prevent me to release my web extension for Safari 14. Please help! I send ticket in Macos Feedback tool few weeks ago, no response.
Radar WebKit Bug Importer
Comment 2 2020-11-09 09:54:32 PST
<rdar://problem/71196650>
Smoley
Comment 3 2020-11-10 17:35:55 PST
Can you please post the Feedback ID?
Rustem
Comment 4 2020-11-12 00:28:17 PST
(In reply to Smoley from comment #3) > Can you please post the Feedback ID? FB8784553
Rustem
Comment 5 2020-12-01 00:52:22 PST
Sorry no update?
Chad
Comment 6 2021-07-15 12:51:56 PDT
We are also experiencing this issue @ Bitwarden after migrating to Web Extensions. Any update or movement from Apple's side?
Rustem
Comment 7 2021-08-01 00:54:51 PDT
Created attachment 434714 [details] Screen flickering doesnt happen in fullscreen mode
Rustem
Comment 8 2021-08-01 00:55:18 PDT
Also when Safari in full-screen mode flickering doesn't happen. I attached a video
steve.nutter
Comment 9 2022-01-09 22:10:55 PST
This tiny window size has been an awful experience using Bitwarden with Safari for a year now. Chad also mentions this on 2021-07-15 and there's been zero traction on the issue. WHEN is this going to get fixed by Apple? Still an issue on Safari 15.2. Thanks!
Brent Fulgham
Comment 10 2022-01-10 11:04:24 PST
This is actually: <rdar://problem/70083294>
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