NEW 235874
Absolutely positioned element at top -9999999em disables scrolling 
https://bugs.webkit.org/show_bug.cgi?id=235874
Summary Absolutely positioned element at top -9999999em disables scrolling
Gabriele Romanato
Reported 2022-01-30 14:20:47 PST
Created attachment 450368 [details] Miminal test case Having an element negatively positioned outside the viewport, negative contextual positioning (i.e. the immediate ancestor is relatively positioned) disables vertical scrolling on the whole document when the content of the positioned element has been hidden via the overflow property. Minimal test case (attached): https://gabrieleromanato.dev/test/css/safari-negative-positioning-overflow.html
Attachments
Miminal test case (7.20 KB, text/html)
2022-01-30 14:20 PST, Gabriele Romanato 		no flags
Details
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Simon Fraser (smfr)
Comment 1 2022-01-31 09:41:17 PST
Looks like we hit LayoutUnit limits when computing overflow.
Simon Fraser (smfr)
Comment 2 2022-01-31 09:42:06 PST
Simple workaround is to use smaller negative offset.
Radar WebKit Bug Importer
Comment 3 2022-01-31 09:43:29 PST
<rdar://problem/88276643>
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