  opened: false
    }

    function getMeta() {
      if (!meta) {
        meta = document.createElement('core-meta');
        meta.type = 'transition';
      }
      return meta;
    }

    function setup() {
      var target = document.getElementById('animate-me');

      if (transition) {
        transition.teardown(target);
      }

      var value = document.getElementById('sel').selectedOptions[0].value;
      transition = getMeta().byId(value);
      transition.setup(target);
    }

    function stuf