NEW 170336
iframe/body marginwidth leftmargin et al attributes are not per spec 
https://bugs.webkit.org/show_bug.cgi?id=170336
Summary iframe/body marginwidth leftmargin et al attributes are not per spec
Simon Pieters (:zcorpan)
Reported 2017-03-31 04:59:58 PDT
WebKit and Chromium copy marginwidth and marginheight attributes from <iframe> to the child document's <body>. This does not match Gecko or Edge and is non-conforming with HTML standard. See https://github.com/whatwg/html/issues/2484 https://github.com/whatwg/html/pull/2489 https://github.com/w3c/web-platform-tests/issues/5276
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Ahmad Saleem
Comment 1 2022-08-10 03:19:19 PDT
Safari Technical Preview 150 still fail following WPT tests: https://wpt.fyi/results/html/rendering/non-replaced-elements/the-page?label=master&label=experimental&aligned&view=subtest&q=iframe%20margin Just wanted to update. Thanks!
Radar WebKit Bug Importer
Comment 2 2022-08-10 10:53:54 PDT
<rdar://problem/98459931>
Ryosuke Niwa
Comment 3 2022-08-10 14:19:54 PDT
We have a FIXME about this in HTMLBodyElement::didFinishInsertingNode(): https://github.com/WebKit/WebKit/blob/main/Source/WebCore/html/HTMLBodyElement.cpp#L166
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