AdrianDuan opened a new issue, #18456:
URL: https://github.com/apache/echarts/issues/18456
### What problem does this feature solve?
在数据为空时，label不会展示，我想在数据为空时，展示自定义的标签，想问一下是否有配置项允许在数据为空时展示label呢？
以下方配置数据为例：
```
option = {
xAxis: {
type: 'category',
data: ['Mon', 'Tue', 'Wed', 'Thu', 'Fri', 'Sat', 'Sun']
},
yAxis: {
type: 'value'
},
series: [
{
data: [150, 230, '-', 218, 135, 147, 260],
type: 'line',
label: {
show: true,
formatter: (params) => {
if(!params.data) {
return '暂无数据'
}
return '有数据'
}
}
}
]
};
```
无法做到在没有数据的时候展示空标签
### What does the proposed API look like?
希望label有配置选项，允许数据为空时也会调用formatter展示标签
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