<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8" />
    <title>GraphViz UI</title>
</head>
<body>
    <h2>Your App's Routing state machine</h2>
    <h2 id="loading">Loading...</h2>
    <div id="graph-yo"></div>

    <!-- Using https://github.com/mdaines/viz.js -->
    <script src="/viz.js"></script>
    <script src="/full.render.js"></script>
    <script type="text/javascript">
        let viz = new Viz();

        fetch('/graph')
            .then(function (response) {
                return respons