How can I handle errors in my Node.js app on Heroku?

How can I handle errors in my Node.js app on Heroku?

You can handle errors in your Node.js app on Heroku by using middleware to catch errors and sending appropriate responses.

What kind of middleware should I use?

You can use Express error-handling middleware. It typically has four parameters: err, req, res, and next.

Can you show me an 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!');
});

What if I want to log errors to an external service?

You can integrate services like Sentry or Loggly to log errors. Just call their API in your error-handling middleware.