Express is the most popular framework for backend NodeJS development. It is the most common backend technology that we work with at slashdev.io and powers most startups and tech teams today.

Express.js, or simply Express, is a fast, unopinionated, and minimalist web framework for Node.js. It was created by TJ Holowaychuk and is maintained by the Node.js Foundation. Express is widely used for building web applications and APIs (Application Programming Interfaces) using Node.js as the backend. It provides a simple and efficient way to create server-side applications with JavaScript.

Some key features of Express.js include:

• Middleware: Express.js employs a middleware-based architecture, allowing developers to use various middleware functions to handle different tasks, such as request processing, response formatting, and error handling. Middleware functions are executed in the order they are added, enabling a high level of customization and flexibility in the application flow.
• Routing: Express.js provides a powerful and easy-to-use routing system, allowing developers to define routes for handling different HTTP requests (e.g., GET, POST, PUT, DELETE) and URL patterns. This makes it simple to create RESTful APIs and manage various endpoints in a web application.
• Template Engines: Express.js supports various template engines, such as Pug, EJS, Handlebars, and more, enabling developers to create dynamic HTML pages by injecting data from the server. This allows for efficient server-side rendering and enhances the overall user experience.
• Performance: Express.js is built on top of Node.js, which is known for its high-performance capabilities and efficient handling of I/O operations. This makes Express.js suitable for building fast and scalable web applications and APIs.
• Easy Integration: Express.js can be easily integrated with other popular Node.js libraries and modules, such as Passport for authentication, Mongoose for database interaction, and Socket.IO for real-time communication, to name a few.
• Community and Support: Express.js has a large and active community of developers who contribute to its ongoing development, maintenance, and improvement. Numerous resources, including tutorials, documentation, and support forums, are available, making it easier for developers to learn and troubleshoot issues.