AngularJS controller experiencing scope() function returning undefined issue

I've been working with a function inside the controller:

$scope.passValues = function (param1){
    return "foo";
};
console.log($scope.passValues());

It logs foo, but then I tried this:

$scope.passValues = function (param1){
        return param1;
};
console.log($scope.passValues());

I'm a bit puzzled because:

$scope.passValues = function (param1){
        console.log(param1);
        return param1;
     };

This will log robert, which is correct when used as passValues(item.firstName). My issue lies in the second example, where I need the function to correctly return the value of param1 for later use in the controller.

Answer №1

Don't forget to provide a value when calling your function, or else it will receive an argument of undefined

coming from the controller

$scope.passValues('Robert')

And in your view

<div>
{{ passValues('Robert') }}
</div>

Answer №2

It's puzzling why there was a downgrade for this question, as it was valid and here is the solution. Perhaps I wasn't clear enough in my explanation.

In order to pass the value of param1 from one controller to another, I had to utilize a service:

First controller:

  $scope.passValues = function (param1){
      myservice.firstName = param1;
 };

The service:

.service('myservice', function() {
})

Second controller:

  .controller('detail',
    function ($scope, myservice) {
        $scope.content = myservice.firstName;

    });

Now, when {{content}} is used in the template, it accurately displays the value of param1 (firstName).

Answer №3

When I encountered the issue of scope() returning undefined, it prompted me to investigate further.

In my scenario, I had a module named myApp with a controller called MyController, containing a function named $scope.reloadItems:

<div ng-app='myApp' ng-controller='MyController' id="myAngularApp">

The JavaScript files being loaded were:

  • angular.min.js, ng-infinite-scroll.min.js
  • my custom file my_angular_app.js defining the module
  • as well as some_view.js, where I was utilizing:

    $('#myAngularApp').scope().reloadItems();
    

It became apparent that the scope() function would return undefined under certain circumstances, such as when the module failed to instantiate properly or encountered an error. The root cause in my situation was related to the order of loading the .js files. Specifically, $('#myAngularApp').scope() was being executed before my_angular_app.js had the opportunity to create the module...

For anyone facing a similar dilemma, I trust this explanation will provide some insight :)

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