Why function declarations are asynchronous. However, the callback function of the function is synchronous?

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Open fjqingyou opened 4 years ago

fjqingyou commented 4 years ago

If the callback needs to call the function of asynchronous function.. Can't wait for asynchronous processing results in synchronous functions?

fjqingyou commented 4 years ago

Does it seem more appropriate to keep all asynchronous structures?