catch reject from promise

Question

I want to hold the error from func() reject, not direct to onError() by choise,

Before I always let func() reso

Answer 1

co supports try/catch:

co(function* () {
  try{
      yield func();
  }
  catch {
     // if reject catch here, not direct to onError 
  }




  yield func();
  // if reject don't catch here just direct to onError

}).then(function (response) {
  response = JSON.stringify(response);
  res.send(response);
}, function (err) {
  onError(err);
});

See docs : https://www.npmjs.com/package/co#examples