title: How to get query string in Polymer
body: <p>Is there anyway how can I get query string in Polymer?</p>
  
  <pre><code>http://localhost:8080/search?param=ppshein
  </code></pre>
  
  <p>I want to get <code>search?param=ppshein</code> or <code>param=ppshein</code> in Polymer.</p>
  
  <p>I've tried to get query string in <code>app-route</code> but it display nothing.</p>
  
  <pre><code>&lt;app-route
      route="[[route]]"
      pattern="/:id"
      data="{{routeData}}"&gt;&lt;/app-route&gt;
  
  [[routeData.id]] **
  </code></pre>