JSFiddle - React, Tailwind, and code Playground
HTML
<ul class="nav">
<li>One</li>
<li>Two</li>
<li>Three</li>
<li>Four</li>
</ul>
CSS
li.active {
color: red;
}
JavaScript
var selector = '.nav li';
$(selector).on('click', function(){
$(selector).removeClass('active');
$(this).addClass('active');
});