<!DOCTYPE html><html lang="en-US"><head><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1" user-scalable="no"><meta name="description" content="ECharts, a powerful, interactive charting and visualization library for browser"><link rel="shortcut icon" href="https://echarts.apache.org/en/images/favicon.png?_v_=20200710_1"><link rel="stylesheet" type="text/css" href="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/css/bootstrap.min.css"><!-- HTML5 shim and Respond.js for IE8 support of HTML5 elements and media queries--><!--[if lt IE 9]><script src="https://oss.maxcdn.com/html5shiv/3.7.2/html5shiv.min.js"></script><script src="https://oss.maxcdn.com/respond/1.4.2/respond.min.js"></script><![endif]--><link rel="stylesheet" type="text/css" href="https://echarts.apache.org/en/css/main.css?_v_=08cdd0d259"><script>window.EC_WWW_LANG = 'en';
</script><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/pace-progressbar@1.0.2/pace.min.js"></script><script id="font-hack" type="text/javascript">if (/windows/i.test(navigator.userAgent)) {
    var el = document.createElement('style');
    el.innerHTML = ''
        + '@font-face {font-family:"noto-thin";src:local("Microsoft Yahei");}'
        + '@font-face {font-family:"noto-light";src:local("Microsoft Yahei");}';
    document.head.insertBefore(el, document.getElementById('font-hack'));
}
</script><title>Documentation - Apache ECharts</title><style>html, body {
    /* position: sticky should not have overflow parents.*/
    overflow-x: hidden;
}</style><link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/element-ui@2.13.2/lib/theme-chalk/index.css"><link rel="stylesheet" href="https://echarts.apache.org/en/css/doc-bundle.css?_v_=a8e45b69d5"><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/jquery@2.2.4/dist/jquery.min.js"></script></head><!--[if lte IE 8]><body class="lower-ie"><div id="lowie-main"><img src="https://echarts.apache.org/en/images/forie.png?_v_=20200710_1" alt="ie tip"></div></body><![endif]-->
<!--[if (gt IE 8)|!(IE)]><body class="undefined"></body><![endif]--><div id="apache-banner"><div class="txt"><p>Please visit the official Apache ECharts Website at</p><a id="a2" href="https://echarts.apache.org/zh/index.html">https://echarts.apache.org</a></div><a href="https://echarts.apache.org" target="_blank" onclick="logApache()" class="btn btn-main"><div>Visit Official Website</div></a><a href="javascript:;" onclick="closeApacheBanner(true)" class="close-btn">x</a></div><div id="main"><nav id="ec-doc-nav" class="navbar navbar-default navbar-fixed-top doc-nav"><nav role="navigation" class="navbar navbar-default navbar-fixed-top"><div class="container-fluid"><div class="navbar-header"><button type="button" data-toggle="collapse" data-target="#navbar-collapse" aria-expanded="false" class="navbar-toggle collapsed"><span class="sr-only">Toggle navigation</span><span class="icon-bar"></span><span class="icon-bar"></span><span class="icon-bar"></span></button><a href="https://echarts.apache.org/en/index.html" class="navbar-brand"><img src="https://echarts.apache.org/en/images/logo.png" alt="echarts logo" class="navbar-logo"></a></div><div id="navbar-collapse" class="collapse navbar-collapse"><ul class="nav navbar-nav navbar-left"><li id="nav-index"><a href="https://echarts.apache.org/en/index.html">Home</a></li><li id="nav-doc" class="dropdown"><a href="#" data-toggle="dropdown" class="dropdown-toggle">Docs<b class="caret"></b></a><ul class="dropdown-menu"><li><a href="https://echarts.apache.org/en/feature.html">Features</a></li><li><a href="https://echarts.apache.org/en/tutorial.html">Tutorials</a></li><li><a href="https://echarts.apache.org/en/api.html">API</a></li><li><a href="https://echarts.apache.org/en/option.html">Chart Configuration</a></li><li><a href="https://echarts.apache.org/en/changelog.html">Changelog</a></li><li><a href="https://echarts.apache.org/en/faq.html">FAQ</a></li></ul></li><li id="nav-download" class="dropdown"><a href="#" data-toggle="dropdown" class="dropdown-toggle">Download<b class="caret"></b></a><ul class="dropdown-menu"><li><a href="https://echarts.apache.org/en/download.html">Download</a></li><li><a href="https://echarts.apache.org/en/download-theme.html">Download Themes</a></li><li><a href="https://echarts.apache.org/en/download-extension.html">Download Extensions</a></li></ul></li><li id="nav-examples"><a href="https://echarts.apache.org/examples/en/index.html">Examples</a></li><li id="nav-resources"><a href="#" data-toggle="dropdown" class="dropdown-toggle">Resources<b class="caret"></b></a><ul class="dropdown-menu"><li><a href="https://echarts.apache.org/en/spreadsheet.html">Spread Sheet Tool</a></li><li><a href="https://echarts.apache.org/en/theme-builder.html">Theme Builder</a></li><li><a href="https://echarts.apache.org/en/cheat-sheet.html">Cheat Sheet</a></li><li><a href="https://echarts.apache.org/en/resources.html">More Resources</a></li></ul></li><li id="nav-contribute"><a href="#" data-toggle="dropdown" class="dropdown-toggle">Community<b class="caret"></b></a><ul class="dropdown-menu"><li><a href="https://echarts.apache.org/en/events.html">Events</a></li><li><a href="https://echarts.apache.org/en/committers.html">Committers</a></li><li><a href="https://echarts.apache.org/en/maillist.html">Mailing List</a></li><li><a href="https://echarts.apache.org/en/contributing.html">How to Contribute</a></li><li><a href="https://echarts.apache.org/en/dependencies.html">Dependencies</a></li><li><a href="https://echarts.apache.org/en/coding-standard.html">Code Standard</a></li><li><a href="https://github.com/apache/echarts" target="_blank">Source Code (GitHub)<svg width="15px" height="15px" viewbox="0 0 100 100" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" class="icon-external-link"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></li><li><a href="https://github.com/apache/echarts/issues" target="_blank">Issues (GitHub)<svg width="15px" height="15px" viewbox="0 0 100 100" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" class="icon-external-link"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></li></ul></li><li id="nav-others"><a href="#" data-toggle="dropdown" class="dropdown-toggle">Others<b class="caret"></b></a><ul class="dropdown-menu"><li><a href="https://www.apache.org/" target="_blank">Apache Software Foundation<svg width="15px" height="15px" viewbox="0 0 100 100" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" class="icon-external-link"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></li><li><a href="https://echarts.apache.org/en/security.html">Security</a></li><li><a href="https://www.apache.org/licenses/" target="_blank">License<svg width="15px" height="15px" viewbox="0 0 100 100" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" class="icon-external-link"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></li><li><a href="https://www.apache.org/events/current-event" target="_blank">Events<svg width="15px" height="15px" viewbox="0 0 100 100" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" class="icon-external-link"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></li><li><a href="https://www.apache.org/foundation/sponsorship.html" target="_blank">Sponsorship<svg width="15px" height="15px" viewbox="0 0 100 100" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" class="icon-external-link"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></li><li><a href="https://www.apache.org/foundation/thanks.html" target="_blank">Thanks<svg width="15px" height="15px" viewbox="0 0 100 100" version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" class="icon-external-link"><path fill="currentColor" d="M18.8,85.1h56l0,0c2.2,0,4-1.8,4-4v-32h-8v28h-48v-48h28v-8h-32l0,0c-2.2,0-4,1.8-4,4v56C14.8,83.3,16.6,85.1,18.8,85.1z"></path><polygon fill="currentColor" points="45.7,48.7 51.3,54.3 77.2,28.5 77.2,37.2 85.2,37.2 85.2,14.9 62.8,14.9 62.8,22.9 71.5,22.9"></polygon></svg></a></li></ul></li><li id="nav-ec5"><a href="#" data-toggle="dropdown" class="dropdown-toggle">ECharts 5<span class="new">new</span><b class="caret"></b></a><ul class="dropdown-menu"><li><a href="https://echarts.apache.org/next/en/tutorial.html">Tutorials</a></li><li><a href="https://echarts.apache.org/next/en/api.html">API</a></li><li><a href="https://echarts.apache.org/next/en/option.html">Chart Configuration</a></li><li><a href="https://echarts.apache.org/next/examples/en/index.html">Examples</a></li></ul></li></ul><ul class="nav navbar-nav navbar-right"><li id="nav-homeen"><a href="javascript:;" onclick="changeLang('zh')">中文</a></li><li id="nav-apache"><a href="https://www.apache.org/" target="_blank"><img src="https://echarts.apache.org/en/images/asf_logo_white.png?_v_=20200710_1"></a></li></ul></div></div></nav></nav><div class="page-main"><div id="ec-doc-main"></div></div></div><script type="text/javascript" src="https://cdn.jsdelivr.net/npm/bootstrap@3.3.7/dist/js/bootstrap.min.js"></script><script type="text/javascript" src="https://echarts.apache.org/en/js/common.js?_v_=b5b8944fb9"></script><script src="https://cdn.jsdelivr.net/npm/vue@2.6.11/dist/vue.min.js"></script><script src="https://cdn.jsdelivr.net/npm/element-ui@2.13.2/lib/index.js"></script><script src="https://cdn.jsdelivr.net/npm/codemirror@5.56.0/lib/codemirror.min.js"></script><script src="https://cdn.jsdelivr.net/npm/codemirror@5.56.0/mode/javascript/javascript.js"></script><script src="https://cdn.jsdelivr.net/npm/js-beautify@1.11.0/js/lib/beautifier.min.js"></script><script src="https://echarts.apache.org/en/js/doc-bundle.js?_v_=e979f70419"></script><script type="text/javascript">window.EC_WWW_CDN_PAY_ROOT = 'https://echarts.apache.org';
</script><script type="text/javascript">window.globalArgsExtra = {
    baseUrl: 'documents/option-parts',
    docType: 'option',
    locale: 'en'
};
if (window.EC_WWW_CDN_PAY_ROOT) {
    window.globalArgsExtra.cdnRoot = window.EC_WWW_CDN_PAY_ROOT + '/en/' + window.globalArgsExtra.baseUrl
}</script><script type="text/javascript">document.getElementById('nav-doc').className = 'active';
window.globalArgsExtra.version = '9114843b2b';
echartsDoc.init('#ec-doc-main', window.globalArgsExtra);</script><!-- Baidu Tongji--><script type="text/javascript">var _hmt = _hmt || [];
(function() {
var hm = document.createElement("script");

hm.src = "https://hm.baidu.com/hm.js?54b918eee37cb8a7045f0fd0f0b24395";

var s = document.getElementsByTagName("script")[0];
s.parentNode.insertBefore(hm, s);
})();
</script><!-- Google Analytics--><script type="text/javascript" async src="https://www.googletagmanager.com/gtag/js?id=UA-141228404-1"></script><script type="text/javascript">window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'UA-141228404-1');</script></html>