title: Is it possible to match the # part of a route in React Router 4
body: <p>In my app, I'd like to match both the path and the hash to different components.  For example:</p>
  
  <pre><code>/pageA#modalB
  </code></pre>
  
  <p>Would show PageA as the main page, with modalB over the top.
  I've tried the following, with many variations of the path property:</p>
  
  <pre><code>&lt;Route path="#modalB" component={modalB}/&gt;
  </code></pre>
  
  <p>But nothing works.</p>
  
  <p>In React Router 2 inside a modal 'controller' component, I would use:</p>
  
  <pre><code>browserHistory.listen( (location) =&gt; { //do something with loction.hash })
  </code></pre>
  
  <p>I was hoping for something a little more elegant in V4</p>