<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>Three.js</title>
  <script type="importmap">
  {
    "imports": {
      "three": "https://cdn.jsdelivr.net/npm/three@0.185.1/build/three.module.js",
      "three/addons/": "https://cdn.jsdelivr.net/npm/three@0.185.1/examples/jsm/"
    }
  }
  </script>
  <script type="module" src="webgl.js"></script>
</head>
<body>
  <section>
    <canvas id="canvas" width="500" height="400"></canvas>
  </section>
</body>
</html>