HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>hover single handler</title>
  <style>
    body { font-family: sans-serif; padding: 16px; }
    ul { list-style: none; padding: 0; margin-left: 0; color: blue; }
    li { cursor: default; padding: 8px 12px; margin: 2px 0; }
    li.active { background: #1e293b; color: white; }
    li.detail { background: #f1f5f9; color: #334155; font-size: 14px; }
  </style>
</head>
<body>
  <ul>
    <li>Milk</li>
    <li class="detail">White</li>
    <li>Carrots</li>
    <li class="detail">Orange</li>
    <li>Broccoli</li>
    <li class="detail">Green</li>
  </ul>
  <p id="hint">Hover Milk, Carrots, or Broccoli — detail row slides open.</p>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("li").odd().hide().end().even().hover(function() {
      $(this)
        .toggleClass("active")
        .next()
        .stop(true, true)
        .slideToggle();
    });
  </script>
</body>
</html>

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jQuery .hover(fn) — single handler slideToggle (Try It)