HTML Code

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Secure cookie</title>
</head>
<body>
  <h1>Secure + SameSite=Lax</h1>
  <button type="button" id="set">Set session cookie</button>
  <pre id="out"></pre>
  <script>
    document.getElementById("set").addEventListener("click", function () {
      document.cookie = [
        "session=demo-token",
        "max-age=3600",
        "path=/",
        "Secure",
        "SameSite=Lax"
      ].join("; ");

      var msg = "Protocol: " + location.protocol + "\n";
      if (location.protocol === "https:") {
        msg += "Cookie should appear in DevTools.\n\n" + document.cookie;
      } else {
        msg += "Secure cookies are ignored on http:// — open over HTTPS to store this cookie.";
      }
      document.getElementById("out").textContent = msg;
    });
  </script>
</body>
</html>

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