title: How do I access core-ajax response data via javascript?
body: <p>For instance, if I have the following code in an auto-binding template inside my index.html file:</p>
  
  <p><strong>index.html</strong></p>
  
  <pre><code>&lt;template is="auto-binding"&gt;
      &lt;core-ajax id="ds" auto url="url/to/data.json" response="{{data}}"&gt;&lt;/core-ajax&gt;
      &lt;my-items items="{{data}}"&gt;&lt;/my-items&gt;
  &lt;/template&gt;
  </code></pre>
  
  <p><strong>app.js</strong></p>
  
  <pre><code>(function(document) {
    'use strict';
  
      document.addEventListener('polymer-ready', function() {
          var responseData = ????
      });
  })(wrap(document));
  </code></pre>