JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8/themes/dot-luv/jquery-ui.css">
<section id="current-about">
<nav>
    <li><a href="#" id ="about">About</a></li>
    <li><a href="#" id ="contact">About</a></li>
    <li><a href="#" id ="blog">About</a></li>
</nav>
</section>

CSS

.current { color: red; }

JavaScript

$(function() {
  var id = $('section:has(nav)').attr('id').replace('current-','');
  $('#' + id).addClass('current');
});