What are the best practices for building an API with Express.js?

What are the best practices for building an API with Express.js?

When building an API with Express.js, consider the following best practices: use proper HTTP methods, structure your routes logically, implement error handling, and validate user input.

Can you explain why input validation is important?

Input validation is crucial to prevent malicious data from being processed, which can lead to security vulnerabilities and application crashes.

What about error handling? How should I implement it?

Implement centralized error handling by using middleware. This allows you to catch errors in one place and respond with consistent error messages.

Are there any tools or libraries you recommend for testing my API?

Yes, tools like Postman for manual testing and libraries like Mocha or Jest for automated testing are great choices.