JSFiddle - React, Tailwind, and code Playground
by toroncino
HTML
<div id="1">
<div class="c"></div>
<div class="c"></div>
<div class="c"></div>
</div>
<div id="2">
<div class="c"></div>
<div class="c"></div>
<div class="c"></div>
</div>
<div id="3">
<div class="c"></div>
<div class="c"></div>
<div class="c"></div>
</div>
JavaScript
$('<p>Hello!</p>').appendTo($('#2 .c:eq(1)'));