关于#react.js#的问题：react的hooks中，useReducer的第三个参数有什么用

Question

react的hooks中，useReducer的第三个参数有什么用？initialArg和init的区别。

Answer 1

As far as I can experiment, the init function as third arg is a transformer of the initialState.
e文，题主参考下
https://stackoverflow.com/questions/59041341/whats-the-purpose-of-the-3rd-argument-in-usereducer