w3 css hover code example

Example 1: css hover

.a:hover{background-color: black;}

Example 2: on hover css

/* Changes an element's color on hover */

.selector {
	background-color: black;
}

.selector:hover {
	background-color: blue;
}

Example 3: hover css

<!DOCTYPE html>
<html lang="en">
   <head>
      <meta charset="UTF-8" />
      <title>CSS :hover property</title>

      <style>
         a {
            background-color: powderblue;
            transition: background-color 0.5s;
         }

         a:hover {
            background-color: gold;
         }
      </style>
   </head>
   <body>

	<a href="#">Try hovering over this link.</a>

	<!-- The :hover CSS pseudo-class matches when the user interacts
	with an element with a pointing device, but does not necessarily activate
	it. It is generally triggered when the user hovers over an element with
	the cursor (mouse pointer). -->

   </body>
</html>