how to emit events from a factory

Question

How can I emit events from a factory or service. I am unable to inject $scope into the factory, thus unable to emit events.

I get the following error - Unknow

Answer 1

In your factory inject $rootScope as-

myApp.factory('myFactory',function($rootScope){
return({
// use $rootScope as below to pass myEventParams to all below in hierarchy
$rootScope.$broadcast("myEvent",myEventParams);

})
}]);