访问没有元素的角度$ scope

Question

Every answer I have found involves using an element and accessing $scope from there.

I want to access scope for a given controller, preferably by controller name, in javascript outside the controller definition. Is this even possible?

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For clarity, I'm trying to update a variable being watched on $scope within the controller. I want to have one standalone function that I can pass some parameters into that can perform this function for a multitude of controllers in my application.

If I'm going about this completely the wrong way please correct me. Just started getting in to angular recently.

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Something like:

var myapp = angular.module("myapp", []);

myapp.controller("myController1", function($scope, $http){
    $scope.specialVar = "some value";
});
myapp.controller("myController2", function($scope, $http){
    $scope.specialVar = "some other value";
});

var myFunction = function(controller, val){
    //set the value of specialVar for the passed controller to the passed value
    myapp.AccessController(controller).$scope('specialVar', val);
}

Answer 1

Remember that you can have any number of instances of a given controller coexisting in your application, but only one service; services are effectively singleton. If you're able to assume that there's only ever exactly one instance of a given controller, then it sounds like you're treating that controller as a service, and that you should just use the service instead. If you're not able to assume that there's only ever exactly one instance, then you absolutely need to access through angular.element(domElement).scope() , because otherwise you're going to have a hard time selecting which of the many instances you're talking about.

Remember, you can always use a service and a dictionary/object to map from an arbitrary key into a given scope, if you'd rather not use the element to look up the scope.