'How to import forked echart

So far, I use the standard way to load from node_modules.

   import echarts from 'echarts'

Due to the my project requirement, I have to modify some tree layout source code and build my own echart. And I am having difficult to import.

I tried three ways, all failed.

Could someone tell me the recommended way to import forked echarts？ Thank you very much.

echarts

Solution 1:^[1]

I had the answer from echart developers.

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Solution	Source
Solution 1	user1193256