AngularJS - Issue with Scope not being properly utilized in view when calling controller function

I'm attempting to update a variable within $scope in a controller function, and while the assignment is successful, it doesn't reflect in the view.

app.controller('LoginCtrl', ['$scope', '$http', function ($scope, $http) {

    $scope.test = "test";

    $scope.logIn = function() {
        // Even though this changes the value to test2, it doesn't show up in the view.
        $scope.test = "test2";
    };

}]);

In the login.html:

  DEBUG: {{ test }}

And the routeProvider:

$routeProvider
    .when('/', {
        templateUrl: '/views/login.html',
        controller: 'LoginCtrl'
    })

Am I missing something from the documentation?

Thanks!

Answer №1

The reason for this issue is that Angular may not be detecting the scope changes made by the logIn function, especially if it is being called asynchronously in your situation. To resolve this, you can manually trigger a digest cycle to force Angular to recognize these changes by using:

$scope.$apply()

Answer №2

It appears that the issue at hand may be related to references or inheritance, particularly when dealing with primitive values. For more information on this topic, you can refer to this post: https://github.com/angular/angular.js/wiki/Understanding-Scopes. To test this theory, try encapsulating the value within an object like so:

$scope.viewModel = {};
$scope.viewModel.test = 'Test';

Answer №3

After some investigation, I discovered that the ng-controller="" attribute was mistakenly added to the HTML element invoking the logIn() function.

Surprisingly, this attribute was mistakenly called twice, resulting in the failure of the view update process.

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