MIT License. The node-promise project provides a complete promise implementation. Promises provide a clean separation of concerns between asynchronous behavior and the interface so asynchronous functions can be called without callbacks, and callback interaction can be done on the generic promise interface. The node-promise package provides just a promise implementation, however, https://github.com/kriszyp/promised-io is recommended for more complete promise-based IO functionality. The promised-io includes the promise implementation from node-promise, as well as wrappers around Node's filesystem and other system I/O APIs for consistent promise-based interaction.