Bob2100 opened a new issue, #21399:
URL: https://github.com/apache/echarts/issues/21399
### What problem does this feature solve?
```
markLine: {
symbol: ['none', 'none'],
label: {
show: true,
formatter(params) {
return params.data.value
},
position: 'middle',
distance: (params) => params.data.space/ 2,
}
}
```
比如我期望 distance 可以是动态计算的，像上例一样：`distance: (params) => params.data.space/
2`，但目前 distance 并不支持函数，要是所有配置项都支持函数，那么编程能力将大大增强。
或者`formatter`已经支持了函数，`formatter` 的返回值可以改成这样：
```
{
distance: xxx,
position: yyy,
...
}
```
distance 、position 等就是外层的配置，同样可以增强编程能力。
现在方便是方便，就是不够灵活。
### What does the proposed API look like?
-
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