[GitHub] [echarts] ammmmmms edited a comment on issue #15578: borderWidth and borderColor in the tree chart doesn't work

[GitBox <gi...@apache.org>]

ammmmmms edited a comment on issue #15578:
URL: https://github.com/apache/echarts/issues/15578#issuecomment-903443040


   > This is not a bug. This is because the default [symbol](https://echarts.apache.org/en/option.html#series-tree.symbol) is `'emptyCircle'`. You can set it to be `'circle'` and it will use `color` as filling color.
   
   I just tried it，but I still have a question. the tree node can't show the collapsing and expansion state color when I set the symbol to 'circle'， and `color` does not seem to support callback functions like this ` (params: Object) => Color`， is there any other way to make the `borderColor` work？


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