Bootstrap 4 navbar active backgroup color

Question

In a Bootstrap 3 navbar when a link is active, the link background color is changed to show that its the active link. This seems to be missing in Bootstrap 4. Is there a way to show this or do I need to override the active class?

The Bootstrap 3 navbar shown below. You can see the active home link is highlighted How do I show this in Bootstrap 4.

The angular 5 code below

  <div class="navbar-collapse" [ngbCollapse]="navbarCollapsed" id="navbarContent">
    <ul class="nav navbar-nav mr-auto">
      <li class="nav-item" [routerLinkActive]="['active']" [routerLinkActiveOptions]="{exact:true}">
        <a class="nav-link" [routerLink]="['/home']" (click)="navbarCollapsed = true">HOME</a>
      </li>
      <li class="nav-item" [routerLinkActive]="['active']">
        <a class="nav-link" [routerLink]="['/page1']" (click)="navbarCollapsed = true">Page 1</a>
      </li>
    </ul>
  </div>

Answer 1

Bootstrap 4 doesn't have css for active class.

So you have to add css by your self

Simply add css like

.active {
   background:#4FA9DC; color:#000;
}