Losing $scope reference when incorporating a directive within the controller scope

I have a scenario in my code where I am using two directives. One directive is within the controller scope, while the other directive is not located in the html section.

  <div ng-show="isStore==true">
                <packgroup-directive>
                </packgroup-directive>
                <div class="lineBreaker" ng-if="groupList.length>0"></div>
                 <div ng-controller="WalletController">
                   <outfit-directive></outfit-directive>
                   <div class="imageContainer" ng-show="getPurchaseState() == false" ng-click="buyAllOutfit()">
                        <img class="feature1" ng-src="/app/app_resources/language/en/resources/{{buyAllOutfitBanner}}"/>
                        <div class="buttonBanner">{{allOutfitBannerValue}}
                        <img style="width: 20%" ng-src="/app/app_resources/icons/pep_sign_black.png"></div>
                    </div>
                 </div>

The issue arises because the packgroup-directive does not have the controller tag outside, while the outfit-directive is placed inside the WalletController tag.

The specific problem I am encountering involves a variable called popupopen that controls the closing of a popup. In my controller, I invoke this function from another JS file:

$scope.checkPopup = function(){
      if(popupOpen==1 && dialogID!=null){
        ngDialog.close(dialogID);
        ngDialog.close($scope.dialogID);
        bridge.getPopupState("0");
      }
    }

This function gets called from the external JS file, but the updated value only reflects for the packgroup directive and not for the outfit-directive. Strangely, when I remove it from the WalletController tag, the correct value is displayed.

Check out the full code here: https://jsfiddle.net/x1x1ug5y/

Answer №1

To solve the issue, it's important to address the presence of two isolated scopes. One belongs to the parent (utilized by packgroup) and the other to the child (used by WalletController). To achieve the desired functionality, data sharing between these scopes is necessary. This can be achieved through various methods:

  1. Store the variable in the $rootScope and access it from the child controller. Pros: Simple solution; Cons: Polluting the global scope can have negative implications.
  2. Implement event emitting. Have the parent scope handle changes to the variable and broadcast this value. The child controller will then update accordingly. Pros: Easy to implement; Cons: Direct event approach may complicate debugging and maintenance efforts.
  3. Utilize a specialized service for data sharing between controllers. A commonly used method. Pros: Clear mechanism for data sharing; Cons: Requires additional code implementation.
  4. Utilize components and pass data to the child controller as a parameter. Pros: A clearer approach to data sharing; Cons: Requires Angular 1.5 and some time for reconfiguration.
  5. Consider a workaround by defining the variable as follows: $scope.popup = {isOpen:false}, then attempt to access this object (excluding isOpen field) in the child controller. This approach may work due to $scope inheritance. Pros: Straightforward solution; Cons: Accessing variables implicitly can increase complexity and lead to unexpected bugs.

I hope this explanation proves helpful. For further insights, you can refer to this article.

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