JSFiddle - React, Tailwind, and code Playground

HTML

<div>A</div>
<div class="hide">B</div>
<div class="hide">C</div>
<div class="hide">D</div>
<div class="hide">E</div>
<div class="hide">F</div>
<div class="hide">G</div>
<div class="hide">H</div>
<div class="hide">I</div>
<div class="hide">J</div>

CSS

.hide {
    width: 100px; height: 100px; background-color: red;
    display: none;
}

JavaScript

$(".hide").fadeIn(3000).removeClass("hide");