HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>cookieEnabled — message</title>
</head>
<body>
  <pre id="out"></pre>
  <script>
    var msg = navigator.cookieEnabled
      ? "Cookies are enabled — preferences can be saved."
      : "Cookies are blocked — some features may not work.";
    document.getElementById("out").textContent = msg;
  </script>
</body>
</html>

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cookieEnabled — UI message (Try It)