程序入口点

程序入口点是类似说明符的字符串。 如果字符串不是绝对路径，则解析为当前工作目录的相对路径。 然后由 CommonJS 模块加载器解析该路径。 如果没有找到对应的文件，则抛出错误。

如果找到文件，则其路径将在以下任一条件下传给 ECMAScript 模块加载器：

• 该程序以命令行标志启动，该标志强制使用 ECMAScript 模块加载器加载入口点。
• 该文件的扩展名为 .mjs。
• 该文件没有 .cjs 扩展名，并且最近的父 package.json 文件包含值为 "module" 的顶层 "type" 字段。

否则，使用 CommonJS 模块加载器加载文件。 参阅模块加载器了解更多详细信息。

The program entry point is a specifier-like string. If the string is not an absolute path, it's resolved as a relative path from the current working directory. That path is then resolved by CommonJS module loader. If no corresponding file is found, an error is thrown.

If a file is found, its path will be passed to the ECMAScript module loader under any of the following conditions:

• The program was started with a command-line flag that forces the entry point to be loaded with ECMAScript module loader.
• The file has an .mjs extension.
• The file does not have a .cjs extension, and the nearest parent package.json file contains a top-level "type" field with a value of "module".

Otherwise, the file is loaded using the CommonJS module loader. See Modules loaders for more details.