firebase - Using .numChildren() in AngularFire

Question

I'm trying to use .numChildren() in AngularFire, but not sure I'm doing it correctly.

function getServiceProviders(serviceId) {
  var serviceProviders = ref.child('services').child(serviceId).child('providers');
  return serviceProviders.numChildren();
}

I'm getting the following error:

TypeError: e.numChildren is not a function

Not sure if this is due to me using Browserify, or I'm just trying to access numChildren incorrectly.

Any help is appreciated. Thanks in advance!

Answer 1

Waitting for answers