NEW 219018
Quirks mode: body fills the viewport, rather than the html element 
https://bugs.webkit.org/show_bug.cgi?id=219018
Summary Quirks mode: body fills the viewport, rather than the html element
Andreu Botella
Reported 2020-11-16 20:02:47 PST
By the Quirks Mode spec, the "body fills html" quirk sets the border box size in the block flow direction to the size of the html element minus the margins in body. However, WebKit seems to use the size of the viewport minus the margins, even when the html element has a smaller size. Tests: https://wpt.fyi/results/quirks?label=pr_head&max-count=1&pr=26438
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Smoley
Comment 1 2020-11-18 10:32:25 PST
Thanks for filing. I can reproduce this using http://wpt.live/quirks/body-fills-html-quirk.html on Safari 13.1.3 as well as STP 115 (14.1).
Radar WebKit Bug Importer
Comment 2 2020-11-18 10:32:38 PST
<rdar://problem/71545679>
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