Koa

Koa is a next-generation web framework designed for Node.js by the team behind Express, aiming to provide a smaller, more expressive, and more robust foundation for web applications and APIs. By leveraging modern JavaScript async functions, Koa eliminates the need for callbacks and greatly improves error handling. The core framework does not bundle any middleware, instead offering an elegant suite of methods that make writing servers fast, modular, and maintainable.