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return 数据无法到函数上

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return 数据无法到函数上

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如上图，为什么箭头函数中return不到最终函数呢？

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想要获取formData，将每一层promise都进行return
最里面一层使用return，实际上就是把值返回给上一层的函数，可以使用一个变量接受来理解
想要最外层函数return值，则将里面函数也进行return


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