NEW239946
[css-overflow] an element's scrolling area must include the margin bottom of its last descendant 
https://bugs.webkit.org/show_bug.cgi?id=239946
Summary [css-overflow] an element's scrolling area must include the margin bottom of ...
Gérard Talbot (no longer involved)
Reported 2022-05-01 13:07:56 PDT
Description - - - - - - The bottom edge of an element's scrolling area is the bottom margin edge of all of the element's descendants boxes. Therefore, an element's scrolling area height must include the margin bottom of its last descendant. Tests ----- WPT Test: http://wpt.live/css/css-overflow/margin-block-end-scroll-area-001.html Reference: http://wpt.live/css/css-overflow/reference/ref-if-there-is-no-red.xht Test results: https://wpt.fyi/results/css/css-overflow/margin-block-end-scroll-area-001.html?label=master https://wpt.fyi/results/css/css-overflow/margin-block-end-scroll-area-001.html?label=experimental Blink equivalent bug report: https://bugs.chromium.org/p/chromium/issues/detail?id=750992 The test fails with Epiphany 3.38.2 (WebKitGTK 2.36.0). A green-versus-red variation of the test above: http://www.gtalbot.org/BrowserBugsSection/CSS3LogicalProps/margin-block-end-scroll-area-002.html Related specs - - - - - - - 2.2 Scrollable Overflow https://www.w3.org/TR/css-overflow-3/#scrollable 6. Extensions to the Element Interface; scrollTop attribute https://www.w3.org/TR/cssom-view-1/#dom-element-scrolltop Scrolling area definition https://www.w3.org/TR/cssom-view-1/#scrolling-area
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Radar WebKit Bug Importer
Comment 1 2022-05-08 13:08:18 PDT
<rdar://problem/92928629>
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