How to change the property of another controller from one controller?

Question

Angular

Example
And is it possible to somehow globally access the properties of any controller?

Answer 1

Yes, as already answered here. via $parent.
There may be several situations
1) From the child to the parent
2) We need to get access from the parent to the child.
3) controllers at the same level
1) $scope.$parent.functionName();
2) You can do this: in the child we write something like this

$scope.$parent.functionName =  function(){

};

Well, then in the right place of the parent scope, just call this function.
3) Well, here the principle is similar. If 2 controllers are on the same level, then they have a common parent, you can pass through it.
Another option is
$rootScope.
$emit, $broadcast.
If you need to call a property or function of another controller already on the view. Then you can use the Controller Alias.