JSFiddle - React, Tailwind, and code Playground

by c_vilander

HTML

<a href="#" onclick="showHide()">Show/Hide</a>
<div id="box">Tadaaa!</div>

CSS

a {
  display: block;
  margin: 5px;
  text-decoration: none;
}

#box {
  position: absolute;
  top: 10px;
  left: 100px;
  opacity: 0; 
  width: 100px;
  height: 100px;
  background: #000;
  border-radius: 5px;
  color: #fff;
  text-align: center;  
  -webkit-transition: 2s opacity ease;
          transition: 2s opacity ease;
}

JavaScript

function showHide() {
    var x = document.getElementByID('box');
    if (x.style.opacity == '0')
    {
    x.style.opacity = '1';
    }
    else if (x.style.opacity == '1')
    {
    x.style.opacity = '0';
    }
}