Skipping promise chain after handling error

Question

Using the https://github.com/kriskowal/q library, I\'m wondering if it\'s possible to do something like this:

// Module A

function moduleA_exportedFunction(         


        

Answer 1

It is kind of a design thing. In general, when a module or service returns a promise, you want it to resolve if the call was successful, and to fail otherwise. Having the promise neither resolve or fail, even though you know the call was unsuccessful, is basically a silent failure.

But hey, I don't know the specifics of your modules, or reasons, so if you do want to fail silently in this case, you can do it by returning an unresolved promise:

// Module A

function moduleA_exportedFunction() {
  return promiseReturningService().then(function(serviceResults) {
    if (serviceResults.areGood) {
      // We can continue with the rest of the promise chain
    }
    else {
      performVerySpecificErrorHandling();
      // We want to skip the rest of the promise chain
      return q.defer().promise;
    }
  });
}