index.html

<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <!-- <link rel="icon" type="image/svg+xml" href="/vite.svg" /> -->
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>vue tree</title>
    <style>
      #app {
        display: flex;
        flex-direction: column;
        width: 100%;
        height: 100%;
      }
    </style>
  </head>
  <body>
    <div id="app"></div>
    <script type="module" src="./examples/main.ts"></script>
  </body>
</html>