Pseudo-classes - CSS: Cascading Style Sheets
yle a specific part of an element. syntax selector:pseudo-class { property: value; } like regular classes, you can chain together as many pseudo-classes as you want in a selector. ...
...invalid :valid :visited :where() specifications specification status comment fullscreen api living standard defined :fullscreen. html living standard living standard defines when particular selectors match html elements. selectors level 4 working draft defined :any-link, :blank, :local-link, :scope, :drop, :current, :past, :future, :placeholder-shown, :user-invalid, :nth-col(), :nth-last-col(), :is() and :where(). changed :empty to behave like :-moz-only-whitespace . no significant change for other pseudo-classes defined in selectors level 3 and html5 (though semantic meaning not taken over). html5 recommendation copies the relevant section from the canonical (whatwg) html spec. css basic u...

Pseudo-classes and pseudo-elements - Learn web development
first among its siblings. :first-of-type matches an element which is first of a certain type among its siblings. :focus matches when an element has focus. :focus-visible matches when an element has focus and the focus should be visible to the user. :focus-within matches an element with focus plus an element with a descendent that has focus. :future matches the elements after the current element. :hover matches when the user hovers over an element. :indeterminate matches ui elements whose value is in an indeterminate state, usually checkboxes. :in-range matches an element with a range when its value is in-range. :invalid matches an element, such as an <input>, in an invalid state. :...