JSFiddle - React, Tailwind, and code Playground

by rgthree

HTML

<div id="dancefloor"></div>
<button id="prev" onclick="prevNum()">Previous</button>
<button id="next" onclick="nextNum()">Next</button>

CSS

body {background:#F0F0F0; text-align:center;}
#dancefloor {
    position: relative;
    width: 50px;
    height: 30px;
    border: 2px solid #444;
    overflow: hidden;
    background: #FFF;
    background-image: -webkit-linear-gradient(top, rgba(0,0,0,0.4) 0%, rgba(0,0,0,0.25) 10%, rgba(0,0,0,0.001) 25%, rgba(0,0,0,0.001) 75%, rgba(0,0,0,0.25) 90%, rgba(0,0,0,0.4) 100%);
    box-shadow: 0px 1px 3px rgba(0,0,0,0.4);
    margin: 10px auto;
}
#dancefloor > * {
    display: block; 
    margin: 0px;
    padding: 0px;
    height: 100%;
    width: 100%;
    text-align: center;
    font-size: 28px;
    font-weight: bold;
    line-height: 1;
    transform: translateY(0px);
    -webkit-transform: translateY(0px);
}
#dancefloor.roll > * {
    transition: all 0.2s ease-in-out;
    -webkit-transition: all 0.2s ease-in-out;
    transform: translateY(-30px);
    -webkit-transform: translateY(-30px);
}

JavaScript

var theArray = ["1","2","3","4","5"];
var dancefloor = document.getElementById("dancefloor");
var prev = document.getElementById("prev");
var next = document.getElementById("next");
var current = 0;

dancefloor.addEventListener('transitionend', function(e) {
    dancefloor.removeChild(dancefloor.children[0]);
    prev.disabled = false;
    next.disabled = false;
    dancefloor.classList.remove('roll');
}, false);

function justDance(x) {
    var el = document.createElement('p');
    el.innerText = theArray[x];
    dancefloor.appendChild(el);
    if (dancefloor.children.length === 2) {
        prev.disabled = true;
        next.disabled = true;
        setTimeout(function() {
            dancefloor.classList.add('roll');
        }, 0);
    }
}

function nextNum() {
    current++;
    if (current === theArray.length) {
        current = 0;
    }
    justDance(current);
}

function prevNum() {
    current--;
    if (current < 0) {
        current = theArray.length - 1;
    }
    justDance(current);
}

justDance(current);