__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。
\The file name of the current module. This is the current module file's absolute path with symlinks resolved.
对于主程序,这不一定与命令行中使用的文件名相同。
\For a main program this is not necessarily the same as the file name used in the command line.
当前模块的目录名见 __dirname。
\See __dirname for the directory name of the current module.
示例:
\Examples:
从 /Users/mjr 运行 node example.js
\Running node example.js from /Users/mjr
console.log(__filename);
// Prints: /Users/mjr/example.js
console.log(__dirname);
// Prints: /Users/mjr 给定两个模块:a 和 b,其中 b 是 a 的依赖,目录结构为:
\Given 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
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。
\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.