Ionic controller arguments


Hi, I’m new to ionic (and angular), quick question: sometimes I see something like this on a controller:

controller(‘MyCtrl’, function($scope, $ionicPlatform) { … }

and sometimes this:

controller(‘MyCtrl’, function($scope, $ionicModal) { … }

What determines what is passed as the 2nd parameter? I wasn’t able to find documentation that clearly explains this. TIA!


These aren’t really arguments, they are dependencies you are injected into your controller. Read up on it here:


In that function you pass the services the controller uses.

The whole and corrected syntax would be:

controller('MyCtrl', [
  function($scope, $ionicModal) { ... }

One example uses the ionicPlatform service and the other one the ionicModal service.
maybe you should read into some basic angularjs tutorials.

greetzs, bengtler


That makes more sense. So this would be valid yes?

controller('MyCtrl', [
  function($scope, $ionicModal, $ionicPlatform) { ... }

And in the case the full syntax is not used:

controller('MyCtrl', function($scope, $ionicModal, $ionicPlatform) { ... }

Angular still figures out the right thing to do? (from the variable names)

[edit] this sentence from the above link cleared it up for me:

AngularJS injects all parameters whenever a controller is instantiated.


Yep, the “short” syntax works for all preloaded stuff. like you are including ionic first and then your controller is loaded.

But i prefer it to write all dependencies in the full syntax to avoid problems if you forget something to load and so on or for minification.