JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="//maxcdn.bootstrapcdn.com/bootstrap/3.3.2/css/bootstrap.min.css">
<script src="//maxcdn.bootstrapcdn.com/bootstrap/3.3.2/js/bootstrap.min.js"></script>
<div id="menu">
  <div id="test"><a href="#">Link 1</a></div>
  <div id="test"><a href="#">Link 2</a></div>
  <div id="test"><a href="#">Link 3</a></div>
  <div id="test"><a href="#">Link 4</a></div>
</div>

CSS

#menu a {
    color: #000;
    text-decoration: none;
}

#test {
  width: 100px;
  background-color: red;
  border-bottom: black solid 1px;
}