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<!DOCTYPE html> <html> <title>W3.CSS</title> <meta name="viewport" content="width=device-width, initial-scale=1"> <link rel="stylesheet" href="/lib/w3.css"> <body> <div class="w3-container"> <h2>Hoverable List</h2> <p>The w3-hoverable class adds a grey background color to all list items when you mouse over them:</p> <ul class="w3-ul w3-hoverable"> <li>Jill</li> <li>Eve</li> <li>Adam</li> </ul> </div> </body> </html>