<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<nav class="navbar navbar-expand-md navbar-dark bg-dark fixed-top">
<div class="container">
<a class="navbar-brand text-white" href="#">Bootstrap 4</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarsExampleDefault" aria-controls="navbarsExampleDefault" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarsExampleDefault">
<ul class="navbar-nav ml-auto">
<li class="nav-item active">
<a class="nav-link text-white" href="#">Home</a>
</li>
<li class="nav-item">
<a class="nav-link text-white" href="#">About Us</a>
</li>
<li class="nav-item">
<a class="nav-link text-white" href="#">Services</a>
</li>
<li class="nav-item">
<a class="nav-link text-white" href="#">Products</a>
</li>
<li class="nav-item">
<a class="nav-link text-white" href="#">Contact</a>
</li>
</ul>
</div>
</div>
</nav>
