index.html

<!DOCTYPE html>

<html lang="en">
  <head>
    <title>Ray.js example</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, user-scalable=no, minimum-scale=1.0, maximum-scale=1.0, shrink-to-fit=no">
    <meta name="mobile-web-app-capable" content="yes">
    <meta name="apple-mobile-web-app-capable" content="yes" />
    <meta name="apple-mobile-web-app-status-bar-style" content="black-translucent" />

    <style>
body {
  overflow: hidden;
  margin: 0;
  padding: 0;
}
canvas {
}
    </style>

    <body>

      <script src="node_modules/three/build/three.js"></script>
      <script src="node_modules/three/examples/js/controls/VRControls.js"></script>
      <script src="node_modules/three/examples/js/effects/VREffect.js"></script>
      <script src="build/example.js"></script>

    </body>

</html>