Bootstrap 4 Navbar

navbar.html

<nav class="navbar navbar-fixed-top navbar-dark bg-primary">

    <a class="navbar-brand" href="#">Title</a>

    <button class="navbar-toggler hidden-sm-up pull-xs-right" type="button" data-toggle="collapse" data-target="#collapsingNavbar" aria-controls="collapsingNavbar" aria-expanded="false" aria-label="Toggle navigation">
        &#9776;
    </button>

    <div class="hidden-sm-up" style="margin-top:38px;"></div>

    <div class="collapse navbar-toggleable-xs" id="collapsingNavbar">

        <ul class="nav navbar-nav pull-sm-right">
            <li class="nav-item">
                <a class="nav-link" href="#">Item 1</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Item 2</a>
            </li>
            <li class="nav-item">
                <a class="nav-link" href="#">Item 3</a>
            </li>
        </ul>

    </div>

</nav>