Express.js is a popular, open-source web framework for Node.js that simplifies the process of building web applications and APIs. It provides a range of features and tools for creating robust and scalable web applications, such as routing, middleware, and template engines.

With Express.js, developers can create web servers, handle HTTP requests and responses, and define routes and endpoints for their web applications. It supports a range of HTTP methods, including GET, POST, PUT, and DELETE, and makes it easy to handle parameters and query strings.

This PDF contain Handwritten Notes of Express.JS.