title: on router link active change icon
body: <pre><code>&lt;div class="menuItem mb-3" *ngFor="let menuItem of menuItems"&gt;
      &lt;a routerLink="{{menuItem.link}}" routerLinkActive="active"&gt;
          &lt;img src="{{menuItem.icon}}" alt="{{menuItem.name}}" /&gt;
          &lt;p class="text-center f-12"&gt;{{menuItem.name}}&lt;/p&gt;
      &lt;/a&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>On router link active, I want to change <code>{{menuItem.icon}}</code> to <code>{{menuItem.iconAtv}}</code></p>