JSFiddle - React, Tailwind, and code Playground

HTML

<div class="section1">div1</div>
<div class="section2">div2</div>
<div class="section3">div3</div>

CSS

div {
    cursor:pointer;
    color:black;
}

JavaScript

$('div').on('click',function(){
    $(this).css('color','red').siblings('').css('color','black');
});