JSFiddle - React, Tailwind, and code Playground
HTML
<div class="div1">
<div class="div2">
<div class="div3">
<div>
<input type="text"></input>
</div>
<input type="text"></input>
</div>
</div>
</div>
JavaScript
$('.div1 :input:first').css('background-color','blue');