Promise.reject('Api Error') .then(data => console.log('ok')) .catch(error => { console.log(error); return '1'; }) .then(data => { console.log(data); });

Code analysis:

Promise.reject('Api Error')
  .then(data => console.log('ok'))
  .catch(error => {
    console.log(error); // Will output 'Api Error'
    return '1';
  })
  .then(data => {
    console.log(data); // Will output '1'
  });

Explanation:

1. Promise.reject('Api Error') creates a rejected promise with the error 'Api Error'.
2. The first .then is skipped because the promise is rejected.
3. .catch catches the error, logs it to the console, and returns the string '1'.
4. The returned '1' becomes the successful result for the next .then.
5. The second .then receives '1' and logs it.

Console output:

Api Error
1

Thus, .catch not only handles the error but also transforms the chain back into a successful one, passing the value further.