JSFiddle - React, Tailwind, and code Playground

HTML

<div class="stubborn"></div>

CSS

div { border: 1px solid blue; width: 100px; height: 100px; }
div.stubborn { display: none !important; }

div.stubborn { display: none !important; }

JavaScript

$(function () {
    $('.stubborn')
        .attr('style', 'display: block !important; opacity: 0')
        .animate({opacity: 1});
});