Express.js is a popular framework of Node.js that allows developers to run Javascript code outside of the browser.
Express.js, commonly known as Express, is a minimal and flexible web application framework for Node.js. It provides a set of features for building web and mobile applications.
Express.js inherits an event-driven architecture, and non-blocking I/O model from node.js, making it lightweight and efficient, particularly suitable for building scalable network applications. simplifies the process of creating robust and scalable web applications using Node.js.
Middleware-based architecture allows developers to extend and enhance functionality easily.
Commonly used for building APIs, handling routes, and managing HTTP requests and responses.
Node.js provides the runtime environment, while Express simplifies the development of web applications by providing a structured framework.
Middleware support is one of the most important features of Express.js. Middleware functions are functions that have access to the request and response objects context, as well as the next middleware (forward-request to next middleware) function in the application’s request-response cycle. This feature enables developers to perform tasks like authentication validation, request object modification, logging, and data parsing easily.
Express.js offers a simple structure for defining API routes based on HTTP methods and URL patterns. This capability allows developers to create manageable and organized code for handling various client requests, making it easier to manage and maintain the application.
Express.js provides built-in utility modules and middleware for handling common web development tasks such as routing setup, serving static files, setting headers, and managing sessions. These utility modules help streamline the development process and reduce the need for external (third-party) dependencies.
Express.js supports various template engines like Jade, Pug, and EJS, allowing developers to generate dynamic HTML content seamlessly. This feature simplifies the process of building dynamic web pages with server-side rendering.
Express.js is easy to learn, especially for developers how familiar with Javascript and Node.js technology. Its simple structure for defining API routes makes it accessible for beginners while offering advanced features for more experienced developers.
Express.js is built on top of Node.js technology, Express.js inherits its non-blocking I/O model and event-driven architecture, ensuring high performance and scalability, making it suitable for handling high-traffic web applications and APIs.
Node.js and Express.js have large community support and a vast ecosystem of middleware and plugins available through npm (Node Package Manager). The community contributes to the continuous improvement of the framework, providing support, tutorials, and tools that help developers build better applications faster.