JSFiddle - React, Tailwind, and code Playground

HTML

<div class="topnav">
  <a class="active" href="#home">Home</a>
  <a href="#news">News</a>
  <a href="#contact">Contact</a>
  <a href="#about">About</a>
</div>

CSS

.topnav {
  overflow: hidden;
  background-color: grey;
}

.topnav a {
  float: left;
  display: block;
  color: #f2f2f2;
  text-align: center;
  padding: 10px;
  text-decoration: none;
}

.topnav a:hover {
  background-color: #ddd;
  color: black;
}

.topnav a.active {
    background-color: red;
    color: white;
}

JavaScript

$(document).ready(function() {
  $('.topnav a').click(function() {
    $('.topnav a').removeClass("active");
    $(this).addClass("active");
  });
});