JSFiddle - React, Tailwind, and code Playground

HTML

<a class="nav">Test</a>
<a class="nav">Test2</a>
<a class="nav">Test3</a>
<a class="nav">Test4</a>

JavaScript

$(document).ready(function(){
    $('.nav').click(function(){
        // change all to black, then change the one I clicked to red
       $('.nav').css('color', 'black');
        $(this).css('color', 'red');
    });
});