What are some common errors in Express.js?

What are some common errors I might encounter while using Express.js?

Some common errors in Express.js include 404 Not Found, 500 Internal Server Error, and middleware issues.

Can you explain what a 404 error means?

A 404 error means that the requested resource could not be found on the server. It usually occurs when the URL is incorrect.

How can I handle errors in my Express app?

You can handle errors in Express by using middleware functions that take four arguments: err, req, res, and next.

What is middleware in Express?

Middleware in Express is a function that has access to the request and response objects, and can modify them or end the request-response cycle.