稳定性: 0 - 弃用: 改为使用 require.mainmodule.children

首先需要这个模块的模块,如果当前模块是当前进程的入口点,则为 null,如果模块是由不是 CommonJS 模块的东西(例如:REPL 或 import)加载的,则为 undefined

Stability: 0 - Deprecated: Please use require.main and module.children instead.

The module that first required this one, or null if the current module is the entry point of the current process, or undefined if the module was loaded by something that is not a CommonJS module (E.G.: REPL or import).