RESOLVED CONFIGURATION CHANGED 184496
CSSStyleDeclaration.setPropertyValue should always fire mutation records even if the declaration doesn't change. 
https://bugs.webkit.org/show_bug.cgi?id=184496
Summary CSSStyleDeclaration.setPropertyValue should always fire mutation records even...
Emilio Cobos Álvarez (:emilio)
Reported 2018-04-11 06:53:15 PDT
See the test in https://github.com/w3c/web-platform-tests/pull/10429. https://drafts.csswg.org/cssom/#dom-cssstyledeclaration-setpropertyvalue always ends up in https://drafts.csswg.org/cssom/#update-style-attribute-for (step 8), which calls https://dom.spec.whatwg.org/#concept-element-attributes-set-value, which does queue a mutation record even if the value doesn't change. This is consistent with setAttribute("style", getAttribute("style")), for example.
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Brent Fulgham
Comment 1 2022-07-15 13:57:46 PDT
Safari 15.5+ passes the relevant cssom mutation tests.
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