title: Is it possible to replace a class with routerLinkActive instead of just adding a class?
body: <p>I have an icon on a navigation bar which serves as a link to a <code>admin</code> route, I'd like this icon to change when I'm on that specific route, for this I can just replace the <code>mdi-settings-outline</code> class with <code>mdi-settings</code>, which will show a <em>filled</em> version of the same icon.</p>
  
  <pre><code>&lt;li class="nav-item"&gt;
      &lt;a routerLink="/admin" routerLinkActive="mdi-settings" class="nav-link mdi mdi-settings-outline"&gt;&lt;/a&gt;
  &lt;/li&gt;
  </code></pre>
  
  <p>However the regular <code>routerLinkActive</code> directive will only <em>add</em> the <code>mdi-settings</code> class to the link, which won't have the desired result. Can the routerLinkActive directive somehow <em>replace</em> the class instead of just adding it?</p>