JSFiddle - React, Tailwind, and code Playground

HTML

<div id="parentElement">
    <div class="child">1</div>
    <div class="child">w</div>
    <div class="child">e</div>
    <div class="child">r</div>
</div>

JavaScript

$( "div.child" ).on( "click", function(event){
console.log($(this).index())

} );