header.component.html

<header>
  <nav class="navbar navbar-expand-md navbar-dark bg-dark">
    <div [ngClass]="{'clearfix': !(isNavBarCollapsed | async)}">
      <a class="navbar-brand" routerLink="/home">{{ 'title' | translate }}</a>
    </div>
    <button class="navbar-toggler" type="button" (click)="toggle()" aria-controls="collapsingNav" aria-expanded="false" aria-label="Toggle navigation">
      <span class="navbar-toggler-icon fa fa-bars fa-fw" aria-hidden="true"></span>
    </button>
    <div [ngbCollapse]="(isNavBarCollapsed | async)" class="collapse navbar-collapse" id="collapsingNav">
      <ul class="navbar-nav mr-auto">
        <li class="nav-item">
          <a class="nav-link" routerLink="/home" routerLinkActive="active"><i class="fa fa-home fa-fw" aria-hidden="true"></i> {{ 'nav.home' | translate }}<span class="sr-only">(current)</span></a>
        </li>
      </ul>
    </div>
  </nav>
</header>