index.html

<html>
<head>
    <meta charset="utf-8" />
    <link rel="stylesheet" href="css/style.css" />
    <script src="js/wasm_exec.js"></script>
    <script src="js/stats.min.js"></script>
    <script type="text/javascript">
        function fetchAndInstantiate(url, importObject) {
            return fetch(url).then(response =>
                response.arrayBuffer()
            ).then(bytes =>
                WebAssembly.instantiate(bytes, importObject)
            ).then(results =>
                results.instance
            );
        }
        var go = new Go();
        var mod = fetchAndInstantiate("lib.wasm", go.importObject);
        window.onload = function () {
            mod.then(function (instance) {
                go.run(instance);
            });
        };
    </script>
</head>
<body>
    <script type="text/javascript">
        var stats = new Stats();
        stats.showPanel(1);
        document.body.appendChild(stats.dom);
    </script>
</body>
</html>