100% {background-position: 250% 0, 250% 0}
      }
  </style>
  </head>

  <body>
    <div id="loading">
      <div class="loader"></div>
      <h3>Bundling...</h3>
      <small></small>
      <p class="summary"></p>
      <p class="detail"></p>
    </div>
    <code class="progress-details"></code>

    <script>
      const loading = document.getElementById('loading');
      const progressDetails = document.querySelector('.progress-details');
      const summary = loading.querySelector('.summary');
      co