JSFiddle - React, Tailwind, and code Playground

HTML

<div id="greenn31"></div>

CSS

#greenn31 {
    background-color:#093;
    float: left;
    height: 25px;
    width: 25px;
    position:absolute;
    visibility: hidden;
}

JavaScript

var el = document.getElementById('greenn31');
var style = window.getComputedStyle(el);

if (style.visibility === 'hidden') {
	el.style.visibility = 'visible';
}