How many Pseudo-classes are there in CSS?

How many Pseudo-classes are there in CSS? Wha开发者_如何学Ct are they?

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A bunch of useful ones.

I mostly use: :hover :active but :before :after and :first-child are useful too.

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See 5.10 Pseudo-elements and pseudo-classes of the CSS2 spec.

CSS3 selectors are in Last Call status. See 6.6 Pseudo-classes, and 7 Pseudo elements.