loader page html loading code

<!DOCTYPE html>
<html lang="en">
<head>

  <meta charset="UTF-8">
  <title>Page Loader</title>
 <style type="text/css">
  .loader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 100;
}

.loader-inner {
  width: 50px;
  height: 50px;
  border-radius: 50%;
  border: 10px solid #f3f3f3;
  border-top: 10px solid #FF1493;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  0% { transform: rotate(0deg); }
  100% { transform: rotate(360deg); }
}

.hidden {
  display: none;
}

</style>
</head>
<body>
  <div class="loader">
    <div class="loader-inner"></div>
  </div>


  <div class="container">
    <h1>Welcome!</h1>
    <p>This is the content of the page.</p>
  </div>

  <script>
    window.addEventListener('load', function() {
      document.querySelector('.loader').classList.add('hidden');
    });
  </script>
</body>
</html>