JSFiddle - React, Tailwind, and code Playground

HTML

<ul id="menu">
    <li>inicio</li>
    <li>la empresa</li>
    <li>servicios</li>
</ul>

CSS

.active{
color: red;
}

JavaScript

function itemActivo(){
     $("#menu li").click(function(){
        $("#menu li").removeClass("active");
        $(this).addClass("active");
    });
}

$(document).on("ready", itemActivo());