index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <style>
      * {
        box-sizing: border-box;
      }
      html, pre {
        font-family: tahoma, Menlo, Chinese Quote, Segoe UI, Roboto, RobotoNum,
          PingFang SC, Hiragino Sans GB, Microsoft YaHei, Helvetica Neue,
          Helvetica, Arial, sans-serif;
      }
      /* body {
        background-color: #000;
        color: #fff
      } */
    </style>
  </head>
  <body>
    <div id="app"></div>
  </body>

  <script type="module" src="/tests/index.ts"></script>
</html>