How to pass $scope.var between controllers?

Question

JavaScript

How is the transfer of data to $scope between controllers implemented?

Answer 1

Mostly through services. If the scopes are nested, you can refer to the parent in the child

Answer 2

Through the global scope $rootScope:

app.controller('oneCtrl', ['$scope','$rootScope', function($scope, $rootScope) {
   $rootScope.var=1;
}]);

app.controller('twoCtrl', ['$scope','$rootScope', function($scope, $rootScope) {
   console.log($rootScope.var);     //1
}]);