HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>scoped image demo</title>
  <style>
    body { font-family: sans-serif; padding: 16px; max-width: 32rem; }
    form { padding: 12px; margin: 8px 0; border: 1px solid #e2e8f0; border-radius: 6px; }
  </style>
</head>
<body>
  <form id="cartForm">
    <p>Cart checkout</p>
    <input type="image" src="https://via.placeholder.com/80x28?text=Buy" alt="Buy">
  </form>
  <form id="searchForm">
    <p>Search</p>
    <input type="image" src="https://via.placeholder.com/80x28?text=Search" alt="Search">
  </form>
  <script src="https://code.jquery.com/jquery-3.7.1.min.js"></script>
  <script>
    $("#cartForm input:image").css("outline", "3px solid #2563eb");
    $("form").on("submit", function (e) { e.preventDefault(); });
  </script>
</body>
</html>

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#cartForm input:image — scoped (Try It)