1. Easy to Set Up: Express.js is a minimal and flexible Node.js web application framework that provides a robust set of features for web and mobile applications. It provides a great starting point for developing web apps, and its easy-to-use structure makes it simple to set up.
2. Robust Routing: Express.js provides a robust set of features for routing, which allows developers to easily create dynamic routes and endpoints. It also provides a powerful way to organize application logic and handle requests.
3. Database Integration: Express.js makes it easy to integrate with databases like MongoDB and MySQL. This allows developers to quickly and easily create database-driven applications.
4. Templating: Express.js provides a powerful templating engine that allows developers to quickly and easily create dynamic views. This makes it easy to create custom web pages and applications.
5. Middleware: Express.js provides a powerful middleware system that allows developers to easily create custom middleware functions. This makes it easy to add custom functionality to an application.
Example:
For example, you can use Express.js to create a custom middleware function that checks if a user is authenticated before allowing them to access certain pages. This is a great way to add an extra layer of security to your application.