static/loader.html

<!DOCTYPE html>
<head>
  <link rel="icon" href="/assets/img/doge.jpg">
  <script src="/assets/js/rightclick.js"></script>
  <script src="/assets/js/cloakcheck.js"></script>
    <script>
      var loginValue = localStorage.getItem('login');

if (loginValue === 'enablelogin') {
  var isLoggedIn = localStorage.getItem('pass');

if (isLoggedIn === 'correct') {
  console.log("User has successfully logged in.");
} else {
  console.log('User has attempted to bypass login screen. Redirecting.');
  location.href = '/';
}
} else {
  console.log("Login is not enabled.");
}
  </script>
  <title>Home | Doge</title>
</head>
<body>
<iframe src="loading.html" id="siteurl" style="position: fixed; inset: 0px; outline: none; border: none; height: 100%; width: 100%; overflow: hidden;"></iframe>
<script>
window.onload = function () {
      let encodedUrl = localStorage.getItem("encodedUrl");
      encodedUrl = "/students/lesson/" + encodedUrl;
      document.querySelector("#siteurl").src = encodedUrl;
    };
</script>
</body>