Node.js API Masterclass with Express and MongoDB - Error Handler Middleware

The video tutorial explains how to implement custom error handling in an Express application. It covers the use of the 'next' function to pass errors in asynchronous functions, creating a custom error handler middleware, and integrating it into the application. The tutorial demonstrates logging errors, setting status codes, and returning JSON responses instead of HTML. Future enhancements include extending the core error class for more customization.

What is the purpose of passing an error to the next function in Express?

Describe the default behavior when an invalid Object ID is provided in a request.

What is the significance of creating a custom error handler in Express?

Explain how to create a custom error middleware in Express.

What should be included in the error handler function to log errors effectively?

How does the order of middleware affect error handling in Express?

What changes are made to the response when a custom error handler is used instead of the default?