[Bug 20186] [Custom]: Add a CSS pseudo to distinguish between upgraded, custom elements

https://www.w3.org/Bugs/Public/show_bug.cgi?id=20186

--- Comment #2 from Dimitri Glazkov <dglazkov@chromium.org> ---
Right now, there's
http://dvcs.w3.org/hg/webcomponents/raw-file/tip/spec/custom/index.html#unknown-element-pseudoclass.

This should give you the ability to style anything that hasn't upgraded yet.
For example, if you have x-foo element:

x-foo:unknown <-- matches before upgrade
x-foo <-- matches upgraded

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Received on Monday, 3 December 2012 17:35:47 UTC