Koa

Koa is a lightweight, modern framework for building web applications and APIs using JavaScript on the server side. Developed by the creators of Express, it provides tools to handle HTTP requests and responses efficiently. Koa uses middleware—functions that process requests sequentially—which makes it flexible and easier to manage complex workflows. Its design emphasizes simplicity, modularity, and control over error handling, allowing developers to build scalable, maintainable web services with clean, organized code. Essentially, Koa streamlines server development by providing a solid foundation for creating robust web applications.