JSFiddle - React, Tailwind, and code Playground

HTML

<div id="message">message</div>
<div id="fade">fade</div>

CSS

html, body { height:100%; width:100%; }

JavaScript

function toggle() {
    var message = document.getElementById('message'),
        fade = document.getElementById('fade'),
        currentdisplay = getComputedStyle(message, null)['display'];

    if(currentdisplay == 'block' || currentdisplay == 'inline')
        message.style.display = fade.style.display = 'none';
    else
        message.style.display = fade.style.display = 'block'; /* or inline */
}

document.body.onclick = toggle;