<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Echarts Theme Switch</title>
<script src="./js/jquery.min.js"></script>
<script src="./js/echarts.js" type="text/javascript" charset="utf-8"></script>
<script src = './js/theme/dark.js'></script>
<script src = './js/theme/macarons.js'></script>
</head>
<body>
<select name="" id="sel">
<option value="dark">dark</option>
<option value="macarons">macarons</option>
</select>
<button id = 'clear'>clear</button>
<div id = 'zhuzhuangtu' style="height:399px;"></div>
</body>
</html>
<script>
// 基于准备好的dom，初始化echarts实例
var myChart = echarts.init(document.getElementById('zhuzhuangtu'),'dark');
// 指定图表的配置项和数据
var option = {
title: {
text: 'ECharts 入门示例'
},
tooltip: {},
legend: {
data:['销量']
},
xAxis: {
data: ["衬衫","羊毛衫","雪纺衫","裤子","高跟鞋","袜子"]
},
grid:{
show:true,
backgroundColor:'black'
},
yAxis: {},
series: [{
name: '销量',
type: 'bar',
data: [5, 20, 36, 10, 10, 20]
}]
}; // 使用刚指定的配置项和数据显示图表。
myChart.setOption(option);
$('#sel').change(function(){
myChart.dispose();
let Theme = $(this).val();
// 基于准备好的dom，初始化echarts实例
myChart = echarts.init(document.getElementById('zhuzhuangtu'),Theme);
// 使用刚指定的配置项和数据显示图表。
myChart.setOption(option);
});
</script>
主题什么的在线资源没找到，自行下载吧