   <a class="d-none nav-item nav-link" href="#main-content">nav target</a>
        
        <a class="nav-item nav-link font-weight-bold  text-light" href="/"><i class="fas fa-home"></i></a>
        
          <a class="nav-item nav-link" href="/courses/0/">courses</a>
          
          <a class="nav-item nav-link" href="/posts/0/">posts</a>
          <div class="nav-item dropdown">
          <a class="nav-link dropdown-toggle" href="#" id="userDropdown" role="button" data-toggle="dropdown" aria-haspopup