The function 'ShouldWorkController' was expected but is not defined, receiving undefined instead

Question

The function 'ShouldWorkController' was expected but is not defined, receiving undefined instead

Whenever I attempt to connect a controller to a template using the angular-ui-router $stateProvider, I encounter this error message:

'ShouldWorkController' is not a function. Got undefined.

Surprisingly, when I define the controller within the template using ng-controller, everything functions properly. What could be causing this issue?

app.ts

module App {

    var dependencies = [
        MyControllers            
    ]

    function configuration($stateProvider: ng.ui.IStateProvider) {

        $stateProvider
            .state("shouldWork", {
                url: "/shouldWork",
                templateUrl: "app/shouldWork.html"
                controller: "ShouldWorkController" // has issues working
           });
    }
}

shouldWorkController.ts

module App.MyControllers {

    interface IShouldWorkViewModel {

    }

    class ShouldWorkController implements IShouldWorkViewModel {}

}

ShouldWork.html

<div ng-controller="ShouldWorkController as viewModel" us-spinner spinner-key="spinner-1">
                 ^ --- this operates smoothly

javascript angularjs typescript angular-ui-router

Answer 1

Answer №1

When you encounter that message, it indicates that the controller named "ShouldWorkController" is not loaded in the primary angular module. Ensure that you call register at the conclusion:

module App.MyControllers {    
    ...
    class ShouldWorkController implements IShouldWorkViewModel {}    
}

// Remember to register this controller within a specific module (MyControllers)
// This module should also be referenced in the main app module
angular.module('MyControllers')
    .controller('ShouldWorkController', App.MyControllers.ShouldWorkController );

Answer 2

When you encounter that message, it indicates that the controller named "ShouldWorkController" is not loaded in the primary angular module. Ensure that you call register at the conclusion:

module App.MyControllers {    
    ...
    class ShouldWorkController implements IShouldWorkViewModel {}    
}

// Remember to register this controller within a specific module (MyControllers)
// This module should also be referenced in the main app module
angular.module('MyControllers')
    .controller('ShouldWorkController', App.MyControllers.ShouldWorkController );

Answer 3

Answer №2

Although this post is dated, I stumbled upon it through a Google search while facing the same issue myself. Here are some points to consider:

Ensure you have an export statement for your controller class. It appears that the export statement for your ShouldWorkController class is missing in the code you shared. While this may not be the root cause of your problem, it's worth verifying. Omitting the export statement can lead to errors, as I've experienced personally when removing it from my controller classes.
Verify that your HTML template exists (especially if using UI-Router). According to the UI-Router documentation: "The controller will not be instantiated if the template is not defined."
Consider registering your controllers within the same file as the controller itself. Although some tutorials showcase registering controllers in the module file, I find directly registering the controller within its own file to be less prone to errors in practice.
Double-check your TypeScript references. Make sure to include TypeScript references (e.g.
```
///<reference path="../app/services/shouldWorkService.ts">
```
) in files containing referenced types.
Confirm that the name of your controller matches the one declared in your $stateProvider configuration.

Answer 4

Although this post is dated, I stumbled upon it through a Google search while facing the same issue myself. Here are some points to consider:

Ensure you have an export statement for your controller class. It appears that the export statement for your ShouldWorkController class is missing in the code you shared. While this may not be the root cause of your problem, it's worth verifying. Omitting the export statement can lead to errors, as I've experienced personally when removing it from my controller classes.
Verify that your HTML template exists (especially if using UI-Router). According to the UI-Router documentation: "The controller will not be instantiated if the template is not defined."
Consider registering your controllers within the same file as the controller itself. Although some tutorials showcase registering controllers in the module file, I find directly registering the controller within its own file to be less prone to errors in practice.
Double-check your TypeScript references. Make sure to include TypeScript references (e.g.
```
///<reference path="../app/services/shouldWorkService.ts">
```
) in files containing referenced types.
Confirm that the name of your controller matches the one declared in your $stateProvider configuration.

The function 'ShouldWorkController' was expected but is not defined, receiving undefined instead

app.ts

shouldWorkController.ts

ShouldWork.html

Answer №1

Answer №2

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