JSFiddle - React, Tailwind, and code Playground

HTML

<!DOCTYPE html><html><head>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<meta http-equiv="X-UA-Compatible" content="IE=edge">
<meta name="viewport" content="width=device-width, initial-scale=1">
<title>Bar Group Overlap</title>
<style>
html {
	margin: 0px;
}
body {
	margin: 20px 30px;
}
#realchart {
	width: 850px;
	height: 550px;
    border: 1px solid lightgray;
    margin-bottom: 20px;
}
</style>
<link href="https://unpkg.com/realchart/realchart-style.css" rel="stylesheet" crossorigin="anonymous">
<script type="text/javascript" src="https://unpkg.com/realchart/index"></script>
<script type="text/javascript">
	window.addEventListener('DOMContentLoaded', function () {
		try {
			init();
		} catch (err) {
			alert(err);
			console.error(err);
		}
	});	
</script>

  <script>
    var realChartLic = 'upVcPE+wPOkOR/egW8JuxkM/nBOseBrflwxYpzGZyYkhw7qfHRQ+GiF0lY62mJi5KBwoSJHOA48O5+/xJSE3LhLB4LkQ8rWX0QeIbtyyIEGTFVqWmNPdyQ==';
  </script>
</head>
<body>
	<div id="realchart"></div>
	

		 </body></html>

JavaScript

const config = {
  series: [{
    layout: 'overlap',
    children: [{
      name: "group1",
      data: [11, 22, 15, 9, 13, 27],
      pointPadding: 0.2
    }, {
      name: "group2",
      data: [15, 19, 19, 6, 21, 21],
      pointPadding: 0.3
    }, {
      name: "group3",
      data: [13, 17, 15, 11, 23, 17],
      pointPadding: 0.4
    }]
  }]
};
let animate = false;
let chart;
function init() {
  chart = RealChart.createChart(document, 'realchart', config);
}