<style>
        .navbar .in {
            display: inline-block;
            width: 100%;
        }
    </style>

<!--Navbar-->
    <nav class="navbar navbar-dark bg-primary">

        <div class="container">
            
                <!--Navbar Brand-->
                <a class="navbar-brand" href="#">Navbar</a>
                <!--Links-->

                <!-- Collapse button-->
                <button class="navbar-toggler hidden-sm-up" type="button" data-toggle="collapse" data-target="#collapseEx2">
                    <i class="fa fa-bars"></i>
                </button>
                
            <!--Collapse content-->
            <div class="collapse navbar-toggleable-xs" id="collapseEx2">

                <ul class="nav navbar-nav">
                    <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="#">Features</a>
                    </li>
                    <li class="nav-item">
                        <a class="nav-link" href="#">Pricing</a>
                    </li>
                    <li class="nav-item dropdown">
                        <a class="nav-link dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false">Dropdown</a>
                        <div class="dropdown-menu" aria-labelledby="dropdownMenu1">
                            <a class="dropdown-item" href="#">Action</a>
                            <a class="dropdown-item" href="#">Another action</a>
                            <a class="dropdown-item" href="#">Something else here</a>
                        </div>
                    </li>
                </ul>
                <!--Search form-->
                <form class="form-inline">
                    <input class="form-control" type="text" placeholder="Search">
                </form>
            </div>
            <!--/.Collapse content-->

        </div>

    </nav>
    <!--/.Navbar-->