Re: [w3c/webcomponents] Why must the is="" attribute exist? (#509)

It’s important to note that a lot of elements are implemented partially (or completely) with CSS. So, in order to support this *and* allow user agents to continue to implement elements like they do today, a new CSS pseudo-class would be needed: `:subtypeof(button)`

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Received on Friday, 10 June 2016 18:45:44 UTC