About

A pseudo-class is a keyword added to operator that specifies a special state of the element to be selected.

• Logical Pseudo-class (:matches, :not, :has )
• Tree Pseudo-class (:root, :empty, :blank, …child, of-type)
• Action Pseudo-class (:hover, :active, :focus, :visited)
• Grid Pseudo-class (:nth-column(), :nth-last-column())
• Time Pseudo-class (:current, :past, :future)

Documentation / Reference

• Pseudo-classes
• pseudo-classes