How can I debug middleware in an Express application?

How can I debug middleware in an Express application?

You can use console.log statements to track the flow of requests through your middleware. Would you like an example?

Yes, please provide an example of how to implement that.

Sure! You can add a console.log in your middleware function like this:

app.use((req, res, next) => {
    console.log(`Request URL: ${req.url}`);
    next();
});

This will log the URL of each incoming request.

What if I want to debug errors specifically?

You can catch errors in your middleware by using a try-catch block and logging the error message. Here's an example:

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