JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
    <nav class="navecation">
      <ul id="navi">
        <li><input name="nav" type="radio" id="about"><a class="menu" href="#"><label for="about">aaa</label></a></li>
        <li><input name="nav" type="radio" id="contact"><a class="menu" href="#"><label for="contact">bbb</label></a></li>
        <li><input name="nav" type="radio" id="services"><a class="menu" href="#"><label for="services">ccc</label></a></li>
        <li><input name="nav" type="radio" id="contactus"><a class="menu" href="#"><label for="contactus">ddd</label></a></li>
      </ul>
    </nav>
  </div>

CSS

body {
  font-size: 14px;
}

.container {
  max-width: 960px;
  margin: 0 auto;
}

nav ul li {
  list-style: none;
  float: left;
  padding-right: 20px;
}

nav ul li a {
  text-decoration: none;
  color: black;
  padding: 4px 5px;
}

input {
  display: none;
}

input:checked+a {
  color: blue;
  text-decoration: underline;
}