JSFiddle - React, Tailwind, and code Playground

HTML

<p class="d_10000">Hello world</p>
<p class="d_2000">Hello world 2</p>

CSS

p {
    padding:30px;
    color:#fff;
    background:#000;
    display:none;
}

JavaScript

$('p').fadeIn(parseInt($(this).attr('class').replace('d_','')));