ffSwallowedError.js

function fakeSearch(searchTerms, {onError, onComplete}) {
  console.log('fakeSearch');
  
  try {
   // does some searching with searchTerms
   const res = 'my dumb results'; 
   console.log('got results');
   onComplete(res);
  }
  catch(err) {
    console.log('caught error');
    onError(err);
  }
}

new Promise((resolve, reject) => {
  fakeSearch('fubar', {
    onError: (err) => {
      console.log('passwords.search onError');
      reject(err);
    },
    onComplete: (res) => {
      console.log('passwords.search onComplete');
      resolve(res);
    }
  });
})
.catch((err) => {
  console.log('promise.catch');
  console.log(err);
})
.then((res) => {
  console.log('promise.then');
  console.log(res);
  
  throw new Error('my dumb error'); // this is never shown
});


/*
prints:
got results
passwords.search onComplete
promise.then
my dumb results
*/