Express.js Web Framework

Express.js is a fast, unopinionated, and minimalist web framework for Node.js, providing a robust set of features for building web and mobile applications. The current stable major version is 5.2.1, with the 4.x branch (currently 4.22.1) also actively maintained for security and critical fixes. Releases are frequent, often addressing security vulnerabilities or updating internal dependencies. Express differentiates itself through its flexible middleware-based architecture, allowing developers to build APIs and web servers with significant control and without being locked into a rigid structure, contrasting with more opinionated frameworks. It is widely adopted and serves as a foundational component for many other Node.js frameworks, emphasizing simplicity and modularity.