How can I implement error handling middleware in Express?

How can I implement error handling middleware in Express?

To implement error handling middleware in Express, you can create a middleware function that takes four parameters: err, req, res, and next. This function should be defined after all your routes. Here's a basic example:

app.use((err, req, res, next) => {
    console.error(err.stack);
    res.status(500).send('Something broke!');
});

What should I include in my error handling middleware?

In your error handling middleware, you should log the error details, send an appropriate HTTP status code, and provide a user-friendly message. You can also include different responses based on the error type.

Can I handle different types of errors differently?

Yes, you can customize your error handling middleware to respond differently based on the error type. For example, you can check if the error is a validation error and respond with a 400 status code.

Is there a way to use third-party libraries for error handling?

Absolutely! Libraries like express-async-errors can help manage errors in asynchronous routes, making your error handling cleaner and more efficient.