JSFiddle - React, Tailwind, and code Playground
HTML
<div id="main">
<div class="random no"></div>
<div class="random no"></div>
<div class="random no"></div>
<div class="random no"></div>
<div class="mydiv">My div</div>
</div>JavaScript
$("#main .mydiv").before("<div class='random no'> Random no</div>");