The art of validating data in Angular.js

Question

The art of validating data in Angular.js

I need assistance with my form that looks like the following:

    <div class="modal-header">
     <button type="button" class="close" data-dismiss="modal" aria-hidden="true">&times;</button>
    <h4 class="nomargin">Let us know your concern or question and we will try to respond within 24 hours.</h4>
</div>
<div class="modal-body paddingmodal2">
    <form id="support-form" name="supportForm"  class="nobottommargin" novalidate="">
      <div class="col_full">
            <label for="login-form-username">Description <small>*</small></label>
            <textarea rows="4" cols="50" type="text"  ng-class="{'error': submitted && supportForm.description.$error.required}" id="login-form-username" name="username" class="sm-form-control" ng-model = 'support.description' required/>
        </div>
        <div class="alert" role="alert" ng-class="{'alert-danger':!isLoginSuccess, 'alert-success':isLoginSuccess}" ng-show="isShowLoginAlert" ng-bind="loginSubmitStatusMsg"></div>
        <div class="col_full nobottommargin no-margin-col-full">
            <button type="submit" class="button button-3d button-black nomargin col_full" id="login-form-submit" name="submit-bt" ng-click="saveSupportData(supportForm,support)" ng-disabled="isDisableLoginBtn">Submit</button>
        </div>

    </form>
</div>

JavaScript:

$scope.saveSupportData = function(supportForm,data){
                 if(supportForm.$invalid){
                    return;
                }
}

After clicking on the button, the text area border should be highlighted, but this is not currently happening. Can anyone provide some guidance?

javascript angularjs forms mean

Answer 1

Answer №1

A form is an instance of FormController. When a form instance is created, it can optionally be added to the scope using the name attribute.

Similarly, an input control with the ngModel directive contains an NgModelController instance. This control instance can be linked as a property of the form instance by specifying the name attribute on the input element. The name attribute determines the property name on the form instance.

This means that the internal states of both the form and the control are accessible for binding in the view through standard binding methods.

These capabilities allow us to enhance the example above with the following features:

Displaying custom error messages when a user interacts with a control (when $touched is true) and displaying custom error messages upon form submission ($submitted is true), even if the user has not interacted with a control

The suggested code should look like this:

ng-class="{'error': submitted && supportForm.username.$error.required}"

Make sure to replace 'username' with your actual field name. The 'submitted' variable should be set to true when the form is submitted. You can try implementing it using the function below:

$scope.saveSupportData = function(supportForm,data){
    $scope.submitted=true;
     if(supportForm.$invalid){
      return;
   }
}

Answer 2

A form is an instance of FormController. When a form instance is created, it can optionally be added to the scope using the name attribute.

Similarly, an input control with the ngModel directive contains an NgModelController instance. This control instance can be linked as a property of the form instance by specifying the name attribute on the input element. The name attribute determines the property name on the form instance.

This means that the internal states of both the form and the control are accessible for binding in the view through standard binding methods.

These capabilities allow us to enhance the example above with the following features:

Displaying custom error messages when a user interacts with a control (when $touched is true) and displaying custom error messages upon form submission ($submitted is true), even if the user has not interacted with a control

The suggested code should look like this:

ng-class="{'error': submitted && supportForm.username.$error.required}"

Make sure to replace 'username' with your actual field name. The 'submitted' variable should be set to true when the form is submitted. You can try implementing it using the function below:

$scope.saveSupportData = function(supportForm,data){
    $scope.submitted=true;
     if(supportForm.$invalid){
      return;
   }
}

The art of validating data in Angular.js

Answer №1

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