205059 2019-12-10 05:58:59 -0800 Scroll Behavior: In quirk mode, the scroll-behavior value of <body> is from <html> 2021-12-16 00:45:07 -0800 1 1 1 Unclassified WebKit DOM WebKit Nightly Build Unspecified Unspecified NEW InRadar P2 Normal --- 188043 1 cathiechen webkit-unassigned jonlee rik simon.fraser webkit-bug-importer oldest_to_newest 1597149 0 cathiechen 2019-12-10 05:58:59 -0800 In quirk mode, to perform a window scroll, the document()->scrollingElement() is <body>, while the scroll-behavior value is from <html>. See: https://github.com/w3c/csswg-drafts/issues/2977 1802476 1 webkit-bug-importer 2021-10-10 13:11:03 -0700 <rdar://problem/84078714> 1824580 2 simon.fraser 2021-12-15 16:37:52 -0800 Cathie, could you clarify the bug here? From my testing, we correctly use the value of `scroll-behavior` from the <html> element in non-quirks mode, and correctly do not propagate the value from the body. In quirks mode, we also don't allow the value of `scroll-behavior` on the body to affect window or scrollingElement scrolls, but are you saying that we should? 1824581 3 simon.fraser 2021-12-15 16:38:10 -0800 A testcase showing the bug would be useful. 1824697 4 447333 cathiechen 2021-12-16 00:21:34 -0800 Created attachment 447333 scroll-behavior.html 1824699 5 447334 cathiechen 2021-12-16 00:34:38 -0800 Created attachment 447334 scroll-behavior.html 1824701 6 cathiechen 2021-12-16 00:45:07 -0800 Hi Simon, Just uploaded a test case. I mean, `document.scrollingElement` is `<body>` element, but it takes `<html>` value instead, it seems a little weird. We had an issue to discuss this in github. https://github.com/w3c/csswg-drafts/issues/2977 447333 2021-12-16 00:21:34 -0800 2021-12-16 00:34:38 -0800 scroll-behavior.html scroll-behavior-001.html text/html 390 cathiechen PGh0bWwgc3R5bGU9InNjcm9sbC1iZWhhdmlvcjogc21vb3RoOyI+CiAgICA8Ym9keSBzdHlsZT0i c2Nyb2xsLWJlaGF2aW9yOiBhdXRvOyI+CiAgICAgICAgPGlucHV0IHZhbHVlPSJnb1RvQm90dG9t IiB0eXBlPSJidXR0b24iIG9uY2xpY2s9ImRvY3VtZW50LnNjcm9sbGluZ0VsZW1lbnQuc2Nyb2xs VG8oMCwgMTAwMCkiPgogICAgICAgIDxkaXYgc3R5bGU9ImhlaWdodDogMjAwJTsgYmFja2dyb3Vu ZDogbGluZWFyLWdyYWRpZW50KCNlNjY0NjUsICM5MTk4ZTUpOyI+PC9kaXY+CiAgICAgICAgPGlu cHV0IHZhbHVlPSJnb1RvVG9wIiB0eXBlPSJidXR0b24iIG9uY2xpY2s9ImRvY3VtZW50LnNjcm9s bGluZ0VsZW1lbnQuc2Nyb2xsVG8oMCwgMCkiPgogICAgPC9ib2R5Pgo8L2h0bWw+ 447334 2021-12-16 00:34:38 -0800 2021-12-16 00:34:38 -0800 scroll-behavior.html scroll-behavior-001.html text/html 483 cathiechen PEhUTUw+CiAgICA8c3R5bGU+CiAgICAgICAgaHRtbCB7CiAgICAgICAgICAgIHNjcm9sbC1iZWhh dmlvcjogc21vb3RoOwogICAgICAgIH0KICAgICAgICBib2R5IHsKICAgICAgICAgICAgc2Nyb2xs LWJlaGF2aW9yOiBhdXRvOwogICAgICAgIH0gICAgICAgIAogICAgPC9zdHlsZT4KICAgIDxib2R5 PgogICAgICAgIDxpbnB1dCB2YWx1ZT0iZ29Ub0JvdHRvbSIgdHlwZT0iYnV0dG9uIiBvbmNsaWNr PSJkb2N1bWVudC5zY3JvbGxpbmdFbGVtZW50LnNjcm9sbFRvKDAsIDIwMDApIj4KICAgICAgICA8 ZGl2IHN0eWxlPSJoZWlnaHQ6IDIwMDBweDsgYmFja2dyb3VuZDogbGluZWFyLWdyYWRpZW50KCNl NjY0NjUsICM5MTk4ZTUpOyI+PC9kaXY+CiAgICAgICAgPGlucHV0IHZhbHVlPSJnb1RvVG9wIiB0 eXBlPSJidXR0b24iIG9uY2xpY2s9ImRvY3VtZW50LnNjcm9sbGluZ0VsZW1lbnQuc2Nyb2xsVG8o MCwgMCkiPgogICAgPC9ib2R5Pgo8L2h0bWw+