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;
      }
      #core_selector {
        width: 100%;
        height: 50px;
        left: 10px;
        top: 140px;
        position: absolute;
      }
    </style>
    <core-selector id="core_selector" selected="0"></core-selector>
  </template>

  <script>

    Polymer({
      
    });

  </script>

</polymer-element>