JSFiddle - React, Tailwind, and code Playground

HTML

<div class="find_class">
    <div class="class1"></div>
    <div class="class2"></div>
    <div class="class3"></div> <!-- I wan get class this div -->
</div>

JavaScript

var find = $('div.find_class div:last').find('div:last').attr('class');
alert(find);