echarts.init的第二个参数设置为dark，代码如下：
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script type="text/javascript" src="//repo.bfw.wiki/bfwrepo/js/echarts.js"></script>
</head>
<body>
<div id="myChart" style="width: 800px; height: 600px;"></div>
<script type="text/javascript">
var chart = echarts.init(document.getElementById('myChart'),"dark");
var option = {
legend: {
top: 'bottom'
},
toolbox: {
show: true,
feature: {
mark: { show: true },
dataView: { show: true, readOnly: false },
restore: { show: true },
saveAsImage: { show: true }
}
},
series: [
{
name: 'Nightingale Chart',
type: 'pie',
radius: [50, 250],
center: ['50%', '50%'],
roseType: 'area',
itemStyle: {
borderRadius: 8
},
data: [
{ value: 40, name: 'rose 1' },
{ value: 38, name: 'rose 2' },
{ value: 32, name: 'rose 3' },
{ value: 30, name: 'rose 4' },
{ value: 28, name: 'rose 5' },
{ value: 26, name: 'rose 6' },
{ value: 22, name: 'rose 7' },
{ value: 18, name: 'rose 8' }
]
}
]
};
chart.setOption(option, true);
</script>
</body>
</html>
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