JSFiddle - React, Tailwind, and code Playground

HTML

<ul>
  <li><a href="">test</a></li>
  <li><a href="">test</a></li>
  <li><a href="">test</a></li>
</ul>

CSS

ul {
  border-bottom: 1px solid red;
  font-size: 12px;
  clear:both;
}

li a {
  display: inline-block;
  padding:0.5em;
  background: yellow; 
}