title: React router - get route prop outside of bound component
body: <p>I defined some routes :</p>
  
  <pre><code>render((
      &lt;Router history={hashHistory}&gt;
          &lt;Route path="/" component={App}&gt;
              &lt;IndexRoute component={IndexContainer} /&gt;
              &lt;Route path="/agence" headerWhite={true} component={AgencyContainer} /&gt;
          &lt;/Route&gt;
      &lt;/Router&gt;
  ), document.getElementById('app'));
  </code></pre>
  
  <p>As you can see, I have a prop <code>headerWhite={true}</code> on <code>/agence</code> route. I can access it in my <code>AgencyContainer</code> component via <code>this.props.route.headerWhite</code>. But what I want is to be able to access it in my <code>App</code> component. Is there a simple way to do it ?</p>
  
  <p>What I want to achieve is to pass that <code>headerWhite</code> prop to my <code>Header</code> component which is rendered in my <code>App</code> component because it has to be on every page of the website.</p>
  
  <p>Thank you very much.</p>