CSS: Pseudo-Class Selectors

Match Links

a:link

Match a link.

a:visited

Match visited link.

Example, make link to have underline only when mouse hovers over it:

a:visited, a:link {text-decoration:none}
a:hover {text-decoration:underline;}

Match User Action

T:hover

mouse hover over a element T

T:active

Match a link that's clicked on but mouse button not yet released.

T:focus

when a element is in focus (receive keys, etc. Click on a element to put focus to it.)

Match Target

T:target

Match T that has a id value same as the current URL #fragment.

User Interface Pseudo-Class

T:enabled

Match a user interface T that is enabled.

T:disabled

Match a user interface T that is disabled

T:checked

Match a user interface T which is checked (example: radio-button, checkbox)

T:indeterminate

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Match Language

T:lang(v)

Match T if its value of lang attribute is v.
Example: make Chinese paragraphs red.

p:lang(zh) {color:red;}