What is custom error handling middleware?

Can you explain what custom error handling middleware is?

Custom error handling middleware is a function in web applications that intercepts errors and formats them for the client.

How do I implement it in an Express.js application?

To implement it, you create a middleware function that takes four parameters: error, request, response, and next. Then, you can define how to handle the error.

Can you give me a code example?

Sure! Here's a simple example:

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

What are the benefits of using custom error handling?

It allows for better error management, user-friendly error messages, and centralized error logging.