require.main

• 类型：<module> | <undefined>

Module 对象表示在 Node.js 进程启动时加载的入口脚本，如果程序的入口点不是 CommonJS 模块，则为 undefined。
参见 “访问主模块”。

🌐 The Module object representing the entry script loaded when the Node.js process launched, or undefined if the entry point of the program is not a CommonJS module. See "Accessing the main module".

entry.js 脚本中：

🌐 In entry.js script:

console.log(require.main); 拷贝

node entry.js 拷贝

Module {
  id: '.',
  path: '/absolute/path/to',
  exports: {},
  filename: '/absolute/path/to/entry.js',
  loaded: false,
  children: [],
  paths:
   [ '/absolute/path/to/node_modules',
     '/absolute/path/node_modules',
     '/absolute/node_modules',
     '/node_modules' ] } 拷贝