JSFiddle - React, Tailwind, and code Playground

HTML

<div id="page_effect">the page</div>

CSS

.js #page_effect { display: none; }
.no-opacity #page_effect { display: block; }

JavaScript

$('html').addClass('js');
if ($.support.opacity) {
    $(document).ready(function () {
        $('#page_effect').fadeIn(1500);
    });
} else {
  $('html').addClass('no-opacity');
}