designer

designer.html

<link rel="import" href="../polymer/polymer.html">

<polymer-element name="my-element">

  <template>
    <style>    
      :host {
        position: absolute;
        width: 100%;
        height: 100%;
        box-sizing: border-box;
        top: 0px;
        left: 0px;
      }
    </style>
  </template>

  <script>

    Polymer({
      publish: {
        "hidden": {
          "value": false,
          "reflect": true
        }
      }
    });

  </script>

</polymer-element>