retrieve variable from directive within the controller

I have recently developed a custom directive that I am utilizing in my template:

<data-input> </data-input>

Within my directive (dataInput), the associated template (data-input.html) contains the following HTML code:

<input ng-change="dataChanged()" ... > ...

Additionally, in the JavaScript file, the function is defined as follows:

scope.dataChanged= function(){ //change the data }

Everything functions smoothly, however, I am now facing the challenge of saving the modified data to a variable in my controller, which operates within a separate scope. The template containing 

<data-input> </data-input>
belongs to the final scope that I am attempting to access.

I have attempted to pass it via parameters, but unfortunately, this approach was not successful. Any advice or suggestions would be greatly appreciated.

javascriptangularjs

Answer №1

Consider the following options:

  1. One option is to nest controllers if feasible, allowing for scope inheritance and enabling the sharing of variables from the parent controller.

  2. Another possibility is to utilize $rootscope in both controllers to exchange data. The dataChanged function can store information in the $rootscope.

  3. You may also employ angular.element to access the scope of any element. For example, 

    angular.element('data-input').scope()
    retrieves its scope.

  4. Although not recommended, some individuals resort to using global space to communicate between Angular and non-Angular code under certain circumstances. However, this approach does not seem applicable in your situation.

Answer №2

Angular Watches can be utilized to monitor changes in specific variables, as shown below

For example:

$scope.$watch('age + name', function () {
  //this function is executed when either 'name' or 'age' variables change
  //Alternatively, you can only watch 'age'
});

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