Invoking a Function on a Controller

1. Define a scope function under the defineScope block in the controller.

defineScope : function() {
...
this.$scope.myFunction= function() {

//DO SOMETHING
}
....
},

2. Invoke the function on the scope directly on user action or based on some business logic.

<button data-ng-click="myFunction()"> value="CLICK ME!"
// INVOKES THE FUNCTION myFunction defined on $scope on user click
</button>