javascript - How to convert string to object in Angularjs

I have a string like
:

$scope.text =
            '"{\"firstName\":\"John\",\"age\":454
            }"';

and I
want to convert to js object:

            $scope.tmp = {"firstName":"John","age":454
            };

Note: JSON.parse() doesn't work!!

It's my sample in href="http://codepen.io/essvision/pen/PzjGpQ"
rel="noreferrer">codepen

Answer

You can do it with href="https://docs.angularjs.org/api/ng/function/angular.fromJson"
rel="noreferrer">angular.fromJson()

in
your sample, it would have been $scope.tmp =
angular.fromJson($scope.text);

The
difference between JSON.Parse() and
angular.fromJson, is that angular will check to make sure a
string is provided. If it is already an object, it will return the same
object.