__filename {String} The filename of the code being executed. This is the resolved absolute path of this code file. For a main program this is not necessarily the same filename used in the command line. The value inside a module is the path to that module file. Example: running node example.js from /Users/mjr console.log(__filename); // /Users/mjr/example.js __filename isn't actually a global but rather local to each module.

__dirname {String} The name of the directory that the currently executing script resides in. Example: running node example.js from /Users/mjr console.log(__dirname); // /Users/mjr __dirname isn't actually a global but rather local to each module. For instance, 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 References to __dirname within b.js will return /Users/mjr/app/node_modules/b w

Class: zlib.Zlib Not exported by the zlib module. It is documented here because it is the base class of the compressor/decompressor classes.

Class: zlib.Unzip Decompress either a Gzip- or Deflate-compressed stream by auto-detecting the header.

zlib.unzip(buf[, options], callback)

zlib.unzipSync(buf[, options]) Decompress a Buffer or string with Unzip.

zlib.reset() Reset the compressor/decompressor to factory defaults. Only applicable to the inflate and deflate algorithms.

zlib.params(level, strategy, callback) Dynamically update the compression level and compression strategy. Only applicable to deflate algorithm.

zlib.inflateRaw(buf[, options], callback)

zlib.inflateRawSync(buf[, options]) Decompress a Buffer or string with InflateRaw.