How to Share $scope Data Between States in AngularJS UI-Router?

Passing $scope Data Across States in AngularJS UI-Router

In AngularJS UI-Router, navigating between child states doesn't automatically inherit $scope data from the parent controller. This can pose challenges when needing to share data between states.

Nested View Inheritance

The key to sharing $scope data between states lies in employing the inheritance mechanism provided by UI-Router's view hierarchy. When child views are nested within the parent view, the child scope inherits properties from the parent scope.

Understanding AngularJS Scope Inheritance

AngularJS scopes inherit prototypically, meaning child scopes inherit properties and methods from their parent scope. Using '.' in property names in the ng-model directive ensures that properties are inherited.

Implementation

To share $scope data between states, follow these steps:

1. Define a reference type (e.g., object) in the $scope, such as $scope.Model.
2. In the parent state, initialize the Model object (e.g., $scope.Model = $scope.Model || {Name: "xxx"}).
3. In the child state, access the Model object using ng-model="Model.PropertyName" (e.g., ).

Example

// State Configuration
$stateProvider
  .state("main", {
    url: "/main",
    templateUrl: "main_init.html",
    controller: 'mainController'
  })
  .state("main.1", {
    parent: 'main',
    url: "/1",
    templateUrl: 'form_1.html',
    controller: 'mainController'
  })
  .state("main.2", {
    parent: 'main',
    url: "/2",
    templateUrl: 'form_2.html',
    controller: 'mainController'
  });

// Controller
controller('mainController', function ($scope) {
  $scope.Model = $scope.Model || {Name : "xxx"};
});

By following these steps, you can seamlessly share $scope data between states in UI-Router, ensuring consistent data access across your application.

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