JSFiddle - React, Tailwind, and code Playground

HTML

<div class="container">
        <div class="btn-left" onclick="left();">left</div>
        <div class="carousel">
            <div id="red" class="left"></div>
            <div id="green" class="center"></div>
            <div id="blue" class="right"></div>
        </div>
        <div class="btn-right" onclick="right();">right</div>
    </div>

CSS

body {
    background: rgba(0,255,155,.3);
}
.container {
    width: 960px;
    margin: 0 auto;
    position: relative;
}
.btn-left, .btn-right {
    position: absolute;
    width: 70px;
    text-align: center;
    padding: 10px;
    background: #E1E73D;
    border: 1px solid white;
    border-radius: 5px;
    top: 55px;
    text-transform: uppercase;
}
.btn-left {
    transform: rotate(-90deg);
}
.btn-right {
    transform: rotate(90deg);
    right: 0px;
}
.carousel {
    position: relative;
    margin: 0 auto;
    width: 500px;
    display: -webkit-flex;
    display: -moz-flex;
    display: -ms-flex;
    display: -o-flex;
    display: flex;
}
.carousel div {
    position: relative;
    width: 250px; height: 150px;
    text-align: center;
    /*background: #A6A6A6;*/
    border: 3px solid white;
    border-radius: 8px
}

.left {
    transform: scale(.9);
    right: -5%;
    z-index: 1;
    order: 1;

}
.center {
    z-index: 2;
    order: 2;
    animation-name: center;
    animation-duration: 1s;
}
.right {
    transform: scale(.9);
    left: -5%;
    z-index: 1;
    order: 3;

/*    -webkit-transition: all 1s;
    -o-transition: all 1s;
    transition: all 1s;*/
}

#red{background: #E35656;}
#green{background: #59C854;}
#blue{background: #5949A0;}

/*@keyframes center{
    0% {
        transform: scale(.9);
    }
    30%{
        transform: scale(.1);
    }
    100% {
        transform: scale(1);

    }
}
*/

JavaScript

function left(){
	var container = document.querySelector('.carousel');
	var left = document.querySelector('.left');
	var center = document.querySelector('.center');
	var right = document.querySelector('.right');

	center.className='left';
	right.className='center';
	left.className='right';
	left.remove();
	container.appendChild(left);
}

setInterval(function right(){
	var container = document.querySelector('.carousel');
	var left = document.querySelector('.left');
	var center = document.querySelector('.center');
	var right = document.querySelector('.right');

	center.className='right';
	left.className='center';
	right.className='left';
	right.remove();
	container.appendChild(right);
}, 1000);function left(){
	var container = document.querySelector('.carousel');
	var left = document.querySelector('.left');
	var center = document.querySelector('.center');
	var right = document.querySelector('.right');

	center.className='left';
	right.className='center';
	left.className='right';
	left.remove();
	container.appendChild(left);
}

setInterval(function right(){
	var container = document.querySelector('.carousel');
	var left = document.querySelector('.left');
	var center = document.querySelector('.center');
	var right = document.querySelector('.right');

	center.className='right';
	left.className='center';
	right.className='left';
	right.remove();
	container.appendChild(right);
}, 1000);