Express.js is a lightweight and flexible backend web framework for Node.js used to build web applications and APIs. It simplifies server-side development by providing tools for routing, middleware handling, and HTTP request/response management.
In backend development, Express.js is widely used to create REST APIs, handle server logic, and connect applications with databases. It is minimal by design, allowing developers to build scalable and high-performance backend systems with full control over architecture.
For example:
- A REST API is built using Express.js to handle user login and registration.
- An e-commerce backend processes product data and orders through Express routes.
- A mobile app connects to an Express.js server to fetch and update data.
- A social media platform uses Express.js to manage posts, comments, and notifications.
Common technologies and concepts related to Express.js include:
- Node.js
- REST APIs
- Middleware
- Routing
- JSON Handling
- MongoDB / SQL Databases
- Authentication & Authorization
- Backend Development
- HTTP Methods (GET, POST, PUT, DELETE)
