src/index.html
<!DOCTYPE html>
<html lang="en">
<head>
<title>Visio sample</title>
<meta charset="utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<link href="https://fonts.googleapis.com/icon?family=Material+Icons" rel="stylesheet">
</head>
<body>
<div id="root"></div>
</body>
<script>
$.material.init();
</script>
</html>