Learning Node.js Development

Error handling in promises chaining

Now when it comes to error handling, there are a few quirks; so, we'll simulate some errors. First up, let's simulate an error in our second asyncAdd call. We know we can do that by passing in a value that's not a number. In this case, let's wrap 33 inside quotes:

 asyncAdd(5, 7).then((res) => {   console.log('Result:', res);   return asyncAdd(res, '33'); }, (errorMessage) => {   console.log(errorMessage); }).then((res) => {   console.log('Should be 45', res); }, (errorMessage) => {   concole.log(errorMessage); })

This will be a string and our call should reject. Now we can save the file and see what happens:

We get ...