Text shadow is not working on visualMap

[Clarkkkk]

Version

5.0.1

Reproduction link

https://jsfiddle.net/x4Lf09tm/

Steps to reproduce

Set the text shadow on visualMap:

visualMap: {
  textStyle: {
    color: '#000',
    textShadowColor: '#000',
    textShadowBlur: 2,
  }
}

What is expected?

The text has shadow on it.

What is actually happening?

No shadow on the text.

[echarts-bot]

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[echarts-bot]

This issue is labeled with difficulty: easy.
@Clarkkkk Would you like to debug it by yourself? This is a quicker way to get your problem fixed. Or you may wait for the community to fix.

Please have a look at How to debug ECharts if you'd like to give a try. 🤓