JSFiddle - React, Tailwind, and code Playground

HTML

<div style="display:none" class="test">
  Test 1
</div>
<div style="display:none" class="test">
  Test 2
</div>
<div style="display:none" class="test">
  Test 3
</div>
<div style="display:none" class="test">
  Test 4
</div>

JavaScript

$(document).ready(function() {
  $('.test').fadeIn('slow');
});