__filename
当前模块的文件名。 这是当前模块文件的已解析符号链接的绝对路径。
对于主程序,这不一定与命令行中使用的文件名相同。
当前模块的目录名见 __dirname。
示例:
从 /Users/mjr 运行 node example.js
console.log(__filename);
// 打印: /Users/mjr/example.js
console.log(__dirname);
// 打印: /Users/mjr给定两个模块:a 和 b,其中 b 是 a 的依赖项,且目录结构为:
/Users/mjr/app/a.js/Users/mjr/app/node_modules/b/b.js
在 b.js 中对 __filename 的引用将返回 /Users/mjr/app/node_modules/b/b.js,而在 a.js 中对 __filename 的引用将返回 /Users/mjr/app/a.js。
The file name of the current module. This is the current module file's absolute path with symlinks resolved.
For a main program this is not necessarily the same as the file name used in the command line.
See __dirname for the directory name of the current module.
Examples:
Running node example.js from /Users/mjr
console.log(__filename);
// Prints: /Users/mjr/example.js
console.log(__dirname);
// Prints: /Users/mjrGiven two modules: a and b, where b is a dependency of
a and there is a directory structure of:
/Users/mjr/app/a.js/Users/mjr/app/node_modules/b/b.js
References to __filename within b.js will return
/Users/mjr/app/node_modules/b/b.js while references to __filename within
a.js will return /Users/mjr/app/a.js.