button>
      <div class="element" ng-class="{'dn-hinge':dn_hinge}">
        ...
      </div>
    </section>

    <script src="http://code.angularjs.org/1.2.4/angular.js"></script>
    <script src="http://code.angularjs.org/1.2.4/angular-animate.js"></script>

    <script type="text/javascript" src="./animate.js"></script>
    <script type="text/javascript">
      angular.module('App', ['ngAnimate-animate.css']);
    </script>
  <body>
</html>
