designer

designer.html

<link rel="import" href="../code-mirror/code-mirror.html">

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

  <template>
    <style>    
      :host {
        position: absolute;
        width: 100%;
        height: 100%;
        box-sizing: border-box;
      }
      #code_mirror {
        width: 400px;
        height: 300px;
        left: 230px;
        top: 140px;
        position: absolute;
      }
    </style>
    <code-mirror value="<polymer-element name='my-element'>
  <template></template>
  <script>
    Polymer('my-element', {});
  </script>
</polymer-element>" id="code_mirror"><polymer-element name='my-element'>
  <template></template>
  <script>
    Polymer('my-element', {});
  </script>
</polymer-element></code-mirror>
  </template>

  <script>

    Polymer('my-element', {
      
    });

  </script>

</polymer-element>