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A comment on A lighter V8. Parent comment

Re:A lighter V8 by dictum on Thursday September 12, 2019 @01:29PM (#20954048)
HTML has something of a legacy mode, https://en.m.wikipedia.org/wiki/Quirks_mode

Roughly anything before HTML5/4.01 and XHTML renders in quirks mode.

AFAIK there are no legacy CSS properties. Only nonstandard (i.e. prefixed or experimental and never published in finished specs) properties have been deprecated.

Browsers already have some leeway with DOM APIs. https://developers.google.com/web/updates/2017/01/scrolling-...

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Re:A lighter V8 by jcranmer on Thursday September 12, 2019 @01:38PM (#20954148)
Quirks mode can largely be described with a quirks-mode stylesheet that applies several custom styles to all elements unless otherwise overridden.
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