aiyoudiao opened a new issue #13331:
URL: https://github.com/apache/incubator-echarts/issues/13331
### Version
4.9.0
### Steps to reproduce
1. 在vue中使用echarts的bmap扩展包。
2. 设置bmap的mapStyle属性，添加了styleJson无效。
### What is expected?
可以setMapStyle。
### What is actually happening?
echarts/extension/bmap/BMapView.js文件代码有问题。
代码位置在120行
```js
if (!isEmptyObject(newMapStyle2)) {
```
这段代码中newMapStyle2应该改成newMapStyle
---
我弄了好久，看了半天官网，各种测试都无效。看了源码之后，发现居然是一个变量错误的问题噢。尴尬。
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