What are some examples of async error handling in Node.js applications?

What are some examples of async error handling in Node.js applications?

In Node.js, async error handling can be done using try-catch blocks, promise chaining, and middleware. Would you like examples?

Yes, please provide examples for each method.

Sure! For try-catch, you can wrap your async function like this:

async function fetchData() {
  try {
    const data = await someAsyncCall();
    console.log(data);
  } catch (error) {
    console.error('Error fetching data:', error);
  }
}

For promise chaining:

someAsyncCall()
  .then(data => console.log(data))
  .catch(error => console.error('Error:', error));

And for middleware, you can create an error-handling middleware in Express.

Can you explain the middleware approach in more detail?

Absolutely! In Express, you can create a middleware function to handle errors. 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 and send a response.