For a rejected promise, we have two ways of handling it: we can either use the second callback in the .then() method, or we can use the .catch() method. Here are the two versions available to us:
// alternative 1getMoreData().then( data => { console.log('data',data); }, err => { console.log('error',err); })// alternative 2getMoreData().then(data => { console.log('data', data);}).catch((err) => { console.log('error', err); });
In the first case, we have a second callback added to the then() method, and in the second version, we chain a catch() method to the existing then() method. They are equivalent so you can use either one, but only one.
