lass="navbar-nav mr-auto">
          <li class="nav-item active">
            <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
          </li>
          <li class="nav-item">
            <a class="nav-link" href="#">Link</a>
          </li>
        </ul>
        <form class="form-inline my-2 my-md-0">
          <input class="form-control" type="text" placeholder="Search">
        </form>
      </div>
    </nav>

    <nav class="navbar navbar-expand-sm navbar-dark bg-dark">
      