User action pseudo-classesThe :active, :focus, and :hover CSS pseudo-classes match elements based on how users are interacting with them.selectorsSelectorswidely2015-07-292018-01-29https://drafts.csswg.org/selectors-4/#the-hover-pseudohttps://drafts.csswg.org/selectors-4/#the-active-pseudohttps://drafts.csswg.org/selectors-4/#the-focus-pseudohttps://developer.mozilla.org/docs/Web/CSS/Reference/Selectors/:focuscss.selectors.activecss.selectors.active.non_a_elementscss.selectors.focuscss.selectors.hovercss.selectors.hover.a_elementscss.selectors.hover.all_elementshttps://nowyoucanuse.com/features--user-action-pseudos.html