title: Can't navigate to specific anchor in Angular 4 route
body: <p>I have two separate controllers.
  When I click on a certain link from one controller, I want to be redirect to a specific anchor tag in the other one.</p>
  
  <p>I'm trying to do this by passing as a queryParam to the router the anchor tag.</p>
  
  <p>However, when I try to retrieve it on the destination component, the parameter is undefined.</p>
  
  <p>Here's what I'm doing in my source component:</p>
  
  <pre><code>this.router.navigate(['home',{
  queryParams: {anchor: 'about'}}])
  </code></pre>
  
  <p>And here is how I try to retrieve the parameter in the destination Component:</p>
  
  <pre><code>this.anchor = this.route.queryParams['anchor']
  </code></pre>
  
  <p>But it's always undefined. </p>
  
  <p>The redirection works anyway, but of course I can't go to the specific anchor.</p>