Keep data on page refreshing in AngularJs

var app = angular.module('app', ['ngStorage']);
    app.controller('Ctrl', ["$scope", "$localStorage", function($scope, $localStorage) {
      $scope.$storage = $localStorage.$default({
        a: 100, b:200
      });
    }]);

The HTML Code

<div ng-app="app" ng-controller="Ctrl">
  <h4>Keep the data on page refreshing in AngularJs</h4>
  <button ng-click="$storage.a = $storage.a + 5" class="button">{{$storage.a}}</button> +  
  <button ng-click="$storage.b = $storage.b + 5" class="button">{{$storage.b}}</button> = 
  {{$storage.a + $storage.b}}
</div>

The Full Example code

<!DOCTYPE html>
<html>

<head>
  <script data-require="angular.js@1.1.5" data-semver="1.1.5" src="https://code.angularjs.org/1.4.12/angular.js"></script>
  <script src="https://rawgithub.com/gsklee/ngStorage/master/ngStorage.js"></script>
  <script>
    var app = angular.module('app', ['ngStorage']);
    app.controller('Ctrl', ["$scope", "$localStorage", function($scope, $localStorage) {
      $scope.$storage = $localStorage.$default({
        a: 100, b:200
      });
    }]);
  </script>
</head>

<body ng-app="app" ng-controller="Ctrl">
  <h4>Keep the data on page refreshing in AngularJs</h4>
  <button ng-click="$storage.a = $storage.a + 5" class="button">{{$storage.a}}</button> +  
  <button ng-click="$storage.b = $storage.b + 5" class="button">{{$storage.b}}</button> = 
  {{$storage.a + $storage.b}}
</body>

</html>

The Live output:

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