    <select id="engine">
        <option selected>dot</option>
        <option>neato</option>
      </select>
    </p>

    <p><button id="generate">Generate</button></p>

    <div id="output"></div>
    <div id="inspect"></div>

    <script src="packages/graphviz/web/graphviz.js"></script>
    <script type="application/dart" src="form.dart"></script>
    <script src="packages/browser/dart.js"></script>
  </body>
</html>
