We will define a very simple layout for our application. First, we will define our HTML document and include all of the necessary dependencies:
<html>
<head>
<title>Real-Time 3D Graphics with WebGL 2</title>
<link rel="shortcut icon" type="image/png"
href="/common/images/favicon.png" />
<!-- libraries -->
<link rel="stylesheet" href="/common/lib/normalize.css">
<script type="text/javascript" src="/common/lib/dat.gui.js"></script>
<script type="text/javascript" src="/common/lib/gl-matrix.js"></script>
<!-- modules -->
<script type="text/javascript" src="/common/js/utils.js"></script>
<script type="text/javascript" src="/common/js/EventEmitter.js...