Pify

Pify is a JavaScript package for converting callback-based functions into promise-returning equivalents. It can promisify a single function or process the methods of an entire module automatically. This makes older Node.js callback APIs easier to use with async and await syntax. Developers can selectively include or exclude methods through names or regular-expression patterns. The library can return multiple callback values as an array when an API provides more than one successful result. It also supports APIs that do not follow the conventional error-first callback pattern. Additional options allow the module's main function to remain untouched and permit use of a custom Promise implementation.