How can I implement global error handling in a Node.js application?

How can I implement global error handling in a Node.js application?

You can implement global error handling in Node.js by using middleware. You can create an error-handling middleware function that takes four parameters: err, req, res, and next. This function should be added after all your routes.

Can you show me a code example of that?

Sure! Here's a simple example:

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

This middleware will catch any errors that occur in your routes.

What about handling different types of errors?

You can differentiate errors by checking the error type or properties. For example, you can send different responses based on whether it's a validation error or a server error.

Is there a way to log errors to an external service?

Yes, you can use logging libraries like Winston or integrate with services like Sentry to log errors externally.