How do I troubleshoot middleware issues in Express.js?

I'm having trouble with my Express.js middleware. It's not working as expected. What should I check?

First, ensure that your middleware is correctly defined and added to your Express app. Are you using the correct order?

Yes, I think so. I have it defined before my routes. But it's still not executing.

Check if your middleware function is properly calling next(). If it doesn't, the request won't proceed to the next middleware or route.

I see. I forgot to call next(). What else should I look for?

Also, verify that there are no errors in your middleware logic that might prevent it from executing. Use console logs to debug.