JSFiddle - React, Tailwind, and code Playground

HTML

<div class="sideNav">
Nav 1
</div>
<div class="sideNav">
Nav 2
</div>
<div class="sideNav">
Nav 3
</div>

CSS

.selected{
    color:green;
}

JavaScript

$('.sideNav').click(function(){
    $('.sideNav').removeClass("selected");
    $(this).addClass("selected");

});