<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="//code.jquery.com/jquery-1.11.1.min.js"></script> <!------ Include the above in your HEAD tag ----------> <div class="container"> <div class="row"> <nav class="navbar navbar-expand-lg navbar-light bg-warning"> <a class="navbar-brand" href="#">T.I.P. LIB Logo</a> <button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarSupportedContent" aria-controls="navbarSupportedContent" aria-expanded="false" aria-label="Toggle navigation"> <span class="navbar-toggler-icon"></span> </button> <div class="collapse navbar-collapse" id="navbarSupportedContent"> <ul class="navbar-nav ml-auto topnav"> <li class="nav-item active"> <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a> </li> <li class="nav-item dropdown"> <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> About Us </a> <div class="dropdown-menu" aria-labelledby="navbarDropdown"> <a class="dropdown-item" href="#">Mission and Vision</a> <a class="dropdown-item" href="#">Library Hours</a> <a class="dropdown-item" href="#">Organizational Structure</a> <a class="dropdown-item" href="#">Facilities</a> <a class="dropdown-item" href="#">Affiliations</a> <div class="dropdown-divider"></div> <a class="dropdown-item" href="#">Omnivic</a> </div> </li> <li class="nav-item"> <a class="nav-link" href="#">Services</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Rules and Regulations</a> </li> <li class="nav-item"> <a class="nav-link" href="#">T.I.P. Website</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Online Forms</a> </li> <li class="nav-item dropdown"> <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> Like us on Facebook </a> <div class="dropdown-menu" aria-labelledby="navbarDropdown"> <a class="dropdown-item" href="#">Manila</a> <a class="dropdown-item" href="#">Quezon City</a> </div> </li> <li class="nav-item dropdown"> <a class="nav-link dropdown-toggle" href="#" id="navbarDropdown" role="button" data-toggle="dropdown" aria-haspopup="true" aria-expanded="false"> Canvas </a> <div class="dropdown-menu" aria-labelledby="navbarDropdown"> <a class="dropdown-item" href="#">Manila</a> <a class="dropdown-item" href="#">Quezon City</a> </div> </li> <li class="nav-item"> <a class="nav-link" href="#">Rate Us</a> </li> <li class="nav-item"> <a class="nav-link" href="#">Contact Us</a> </li> </ul> </div>

.topnav a:hover { border-bottom: 3px solid black; }