node-machine/switchback

Switchback is a JavaScript flow control library that normalizes callbacks to a "switchback" pattern, enabling branching logic with custom handlers while maintaining full compatibility with Node.js callbacks. It allows functions to define multiple exit points (like `success`, `error`, or custom handlers) and returns an EventEmitter for flexible usage. Designed for async function implementors and users, it works seamlessly with other flow control libraries like async, promises, and generators.