navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarNavDropdown" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation">
      &lt;span class="navbar-toggler-icon">&lt;/span>
    &lt;/button>

    &lt;div class="collapse navbar-collapse" id="navbarNavDropdown">
  <span class="text-success">
      &lt;!-- Left nav -->
      &lt;ul class="nav navbar-nav mr-auto">
        &lt;li class="nav-item">&lt;a class="nav-link" href="#">Link&lt;/a>&lt;/li>
      