慕课在线编辑器

代码提交代码

<!DOCTYPE html>
<html lang="zh-CN">
	<head>
		<meta charset="utf-8" />
		<meta http-equiv="X-UA-Compatible" content="IE=edge" />
		<meta name="viewport" content="width=device-width,initial-scale=1.0" />
		<title>Echarts Example</title>
	</head>
	<body>
		<button id="btnStart" type="button">开始渲染</button>
		<div id="main" style="width: 800px;height: 400px"></div>
		<script src="//cdn.bootcss.com/echarts/4.5.0/echarts.js"></script>
		<script type="text/javascript">
			// 生成随机数据
			function genData(len, offset) {
				const lngRange = [-10.781327, 131.48];
				const latRange = [18.252847, 52.33];

const result = new Array(len);

for (let i = 0; i < len; i++) {
					const x = +Math.random() * 10;
					const y = +Math.sin(x) - x * (len % 2 ? 0.1 : -0.1) * Math.random() + (offset || 0) / 10;
					result[i] = [x, y];
				}
				return result;
			}

const data = genData(500000);

运行结果