JSFiddle - React, Tailwind, and code Playground

by Valerio Proietti

HTML

<div id="testee"></div>

CSS

#testee {
    height: 100px;
    width: 100px;
    background: black;
    position: absolute;

}

JavaScript

var sw = 1
document.id('testee').addEvent("click", function() {
        sw = sw == 1 ? 0 : 1

        this.get('tween').setOptions({
            duration: 1000
        }).start('opacity', sw)

})