index.html

<!doctype html>
<html lang="zh">
<head>
  <meta charset="utf-8" />
  <meta name="viewport" content="width=device-width, initial-scale=1" />
  <title>vjmapext starter</title>
  <style>
    html, body, #map { margin: 0; height: 100%; }
  </style>
</head>
<body>
  <div id="map"></div>
  <script type="module" src="/src/main.js"></script>
</body>
</html>