best practices questions

In Node.js, error handling is crucial for building robust applications. For synchronous code, use try-catch blocks. For asynchronous code, handle errors in callbacks or use promise-based methods with `.catch()`. Middleware functions in Express can centralize error handling. Always log errors and provide meaningful messages for debugging and user feedback.

Common pitfalls with useEffect include missing dependency arrays, leading to infinite loops or stale closures. Ensuring correct dependencies and cleaning up side effects properly with cleanup functions can help avoid these issues and ensure correct behavior.

Best practices for managing user sessions include using secure cookies with the HttpOnly and Secure flags to prevent access via JavaScript and ensure transmission over HTTPS. Implement session timeouts and inactivity expiration to limit session duration. Regularly regenerate session IDs to protect against session fixation attacks. Use proper session storage mechanisms and avoid storing sensitive information in client-side storage. Additionally, implement session invalidation on logout to ensure that user sessions are terminated effectively and cannot be reused.