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>LinearGradient</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

/**
 * @demo
 *
 * Linear grandient 예제
 */
const config = {
  title: 'Linear Gradient',
  general: {},
  asset: [{
    type: 'linearGradient',
    id: 'gradient-1',
    color: ['#0088ff'],
    opacity: [1, 0]
  }],
  xAxis: {
    type: 'category',
    categories: ['성남시', '용인시', '수원시', '일산시', '화성시', '평택시', '안양시', '부천시', '고양시', ' 안산시']
  },
  yAxis: {},
  series: {
    type: 'area',
    lineType: 'spline',
    marker: {},
    data: [7, 11, 9, 7.5, 15.3, 13, 7, 9, 11, 2.5],
    style: {
      fill: 'url(#gradient-1)',
      fillOpacity: 1,
      strokeWidth: '2px'
    }
  }
};
let chart;
function init() {
  console.log('RealChart v' + RealChart.getVersion());
  // RealChart.setDebugging(true);
  RealChart.setLogging(true);
  chart = RealChart.createChart(document, 'realchart', config);
}