JSFiddle - React, Tailwind, and code Playground

HTML

<ul class="nav2">
<li class="current"><a href="#tab-1" rel="panel">Page one</a></li>
<li><a href="#tab-2" rel="panel">Page two</a></li>
<li><a href="#tab-3" rel="panel">Page three</a></li>
<li><a href="#tab-4" rel="panel">Page four</a></li>
</ul><p>Herein you will find a further description of <a href="#tab-2" rel="panel">page two</a>.

JavaScript

$('a[rel=panel]').click(function (e) {
  $('a[rel=panel]').parent('li').removeClass('current');
  // $(this).parent("li").addClass('current');
  $(".nav2 a[href='" + $(this).attr('href') + "']").parent('li').addClass('current');
});