The link pseudo-classes
E:active
E:hover
E:focus
Matches E during certain user actions.
The dynamic pseudo-classes
E:lang(c)
Matches element of type E if it is in (human) language c (the document language specifies how language is determined).
The :lang() pseudo-class
E F
Matches any F element immediately preceded by an element E.
Adjacent selectors
E[foo]
Matches any E element with the "foo" attribute set (whatever the value).
Attribute selectors
E[foo="warning"]
Matches any E element whose "foo" attribute value is exactly equal to "warning".
Attribute selectors
E[foo~="warning"]
Matches any E element whose "foo" attribute value is a list of space-separated values, one of which is exactly equal to "warning".
Attribute selectors
E[lang|="en"]
Matches any E element whose "lang" attribute has a hyphen-separated list of values beginning (from the left) with "en".
Attribute selectors
DIV.warning
HTML only. The same as DIV[class~="warning"].
Class selectors
E#myid
Matches any E element ID equal to "myid".
ID selectors
