Ensuring accuracy within a personalized directive that is implemented numerous times within a single webpage (AngularJS)

Question

Ensuring accuracy within a personalized directive that is implemented numerous times within a single webpage (AngularJS)

Recently, I designed a unique directive that includes various inputs and dropdowns. To ensure proper binding between the outer and inner scopes for two-way data binding, I implemented an isolate scope. This setup allows me to reuse the directive multiple times on a single page without any issues. However, I have now encountered a challenge regarding validation within the directive.

I am unable to rely on the typical approach of using something like:

ng-show="formName.controlname.$invalid && !formname.controlname.$pristine"

This is primarily due to the following reasons:

The directive should not be concerned with the external form.
Since I have employed the same directive twice on the page, referencing formName.controlname would point to different controls in each instance.

If you have any suggestions or ideas on how to tackle this issue, I would greatly appreciate your input. What aspect might I be overlooking here?

javascript angularjs angularjs-directive

Answer 1

Answer №1

Avoid relying on the form name in your directive implementation. A better approach is to include a dependency on the parent form directive, allowing you to access its controller within your directive's link function:

.directive('customDirective', function() {
    return {
        require: '^form',
        link: function(scope, element, attrs, formController) {
            // utilize formController.$errors
        }
    };
});

Answer 2

Avoid relying on the form name in your directive implementation. A better approach is to include a dependency on the parent form directive, allowing you to access its controller within your directive's link function:

.directive('customDirective', function() {
    return {
        require: '^form',
        link: function(scope, element, attrs, formController) {
            // utilize formController.$errors
        }
    };
});

Answer 3

Answer №2

It would be advisable to handle the validation within your directive.

To achieve this, consider duplicating the scope members that are two-way bound (presumably linked to the form inputs) in order to assess their pristine state and ability to be undone.

Answer 4

It would be advisable to handle the validation within your directive.

To achieve this, consider duplicating the scope members that are two-way bound (presumably linked to the form inputs) in order to assess their pristine state and ability to be undone.

Answer 5

Answer №3

Thank you for your input, but I have found a solution that works for me by using ng-form.

In my directive markup, I included the following:

   <div ng-form="[some name]">
     .......
   </div>

This approach allowed me to continue leveraging the ng-* attributes.

Now within my directive, I can use the following code:

ng-show="somename.controlname.$invalid && !somename.controlname.$pristine"

By containing everything within the directive, I can repeat the control multiple times without affecting validation within each instance of the directive.

Answer 6

Thank you for your input, but I have found a solution that works for me by using ng-form.

In my directive markup, I included the following:

   <div ng-form="[some name]">
     .......
   </div>

This approach allowed me to continue leveraging the ng-* attributes.

Now within my directive, I can use the following code:

ng-show="somename.controlname.$invalid && !somename.controlname.$pristine"

By containing everything within the directive, I can repeat the control multiple times without affecting validation within each instance of the directive.

Ensuring accuracy within a personalized directive that is implemented numerous times within a single webpage (AngularJS)

Answer №1

Answer №2

Answer №3

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