designer

designer.html

<link rel="import" href="../core-ajax/core-ajax.html">

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

  <template>
    <style>    
      :host {
        position: absolute;
        width: 100%;
        height: 100%;
        box-sizing: border-box;
      }
      #core_ajax {
        left: 300px;
        top: 170px;
        position: absolute;
      }
    </style>
    <core-ajax url="https://shipstream-server.herokuapp.com/customers" handleas="json" response="{{ response }}" loading method="GET" id="ajaxtest" on-core-response="{{ handle }}" hidden></core-ajax>
    <div id="result"></div>
    <button id="button" on-click="{{get}}">Press Me</button>
  </template>

  <script>

    Polymer({
      handle: function () {
        console.log(this.$.ajaxtest.response);
        this.$.result.innerHTML = JSON.stringify(this.response);
      },
      response: null,
      get: function(){
       this.$.ajaxtest.go();
      }
    });

  </script>

</polymer-element>