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[css-pseudo-4] Should Element.pseudo("unknown") be an error or return null? #3603

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[css-pseudo-4] Should Element.pseudo("unknown") be an error or return null?#3603
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Closed Accepted by CSSWG ResolutionNeeds Testcase (WPT)css-pseudo-4Current Work
@fantasai

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@fantasai
fantasai
opened on Feb 2, 2019

We resolved to have an Element.pseudo(type) interface that returns a CSSPseudoElement. What happens if someone passes a type that isn't known to the implementation? Do we treat it as non-existent or do we throw an error?

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    Closed Accepted by CSSWG ResolutionNeeds Testcase (WPT)css-pseudo-4Current Work

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