HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>hover list markers</title>
  <style>
    body { font-family: sans-serif; padding: 16px; }
    ul { margin-left: 20px; color: blue; }
    li { cursor: default; padding: 4px 0; }
    li span { color: red; }
  </style>
</head>
<body>
  <ul>
    <li>Milk</li>
    <li>Bread</li>
    <li class="fade">Chips</li>
    <li>Socks</li>
  </ul>
  <p id="hint">Hover list items. Chips has .fade for animation.</p>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("li").hover(
      function() {
        $(this).append($("<span> ***</span>"));
      },
      function() {
        $(this).find("span").last().remove();
      }
    );
    $("li.fade").hover(function() {
      $(this).fadeOut(100);
      $(this).fadeIn(500);
    });
  </script>
</body>
</html>

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jQuery .hover() — list markers (Try It)