<link href="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css"> <script src="//maxcdn.bootstrapcdn.com/bootstrap/4.1.1/js/bootstrap.min.js"></script> <script src="//cdnjs.cloudflare.com/ajax/libs/jquery/3.2.1/jquery.min.js"></script> <!------ Include the above in your HEAD tag ----------> <nav class="navbar navbar-expand-lg navbar-dark bg-dark"> <a href="#" class="navbar-brand">Logo</a> <button class="navbar-toggler" data-target="#navigation" data-control="navigation" data-toggle="collapse"> <span class="navbar-toggler-icon"></span> </button> <div class="collapse navbar-collapse" id="navigation"> <ul class="nav navbar-nav"> <li class="nav-item active"> <a href="#" class="nav-link">Home</a> </li> <li class="nav-item"> <a href="#" class="nav-link">Feature</a> </li> <li class="nav-item dropdown"> <a class="nav-link dropdown-toggle" data-toggle="dropdown" id="preview" href="#" role="button" aria-haspopup="true" aria-expanded="false">Products</a> <div class="dropdown-menu" aria-lableledby="preview"> <a class="dropdown-item" href="#">Product1</a> <a class="dropdown-item" href="#">Product2</a> <a class="dropdown-item" href="#">Product3</a> <a class="dropdown-item" href="#">Product4</a> </div> </li> <li class="nav-item"> <a href="#" class="nav-link">Service</a> </li> <li class="nav-item"> <a href="#" class="nav-link">Contact Us</a> </li> </ul> </div> </nav>