Tips for validating a form in AngularJs when utilizing the ng-repeat directive

Question

Tips for validating a form in AngularJs when utilizing the ng-repeat directive

Within my AngularJS form, I successfully implemented validation for an email field. However, upon adding another email field, the validation applies to all items. My intention is for only the first field to be validated as required.

<form novalidate name="myForm">
  <button class="btn btn-info btn-sm" ng-click="addNewChoice('email')">
    <i class="fa fa-at"></i> Add Email
  </button>
  <br>
  <div class="form-group row">
    <div data-ng-repeat="email in emails">
      <div class="col-md-4 col-sm-12" ng-class="{
                                       'has-error'   :isInputInvalid(myForm.email1),
                                       'has-success' : isInputValid(myForm.email1)
                                        }">
        <label for="email{{ $index + 1}}">Email {{ $index + 1}}</label>
        <input type="email" class="form-control" name="email{{ $index + 1}}" ng-model="formModel.emails[$index + 1]" id="email{{ $index + 1}}" placeholder="Enter email" required>
        <span class="help-block" ng-show="myForm.email1.$error.required && myForm.email1.$dirty">Required</span>
        <span class="help-block" ng-show="myForm.email1.$error.email">Email not valid!</span>
      </div>
    </div>

  </div>
</form>

jsFiddle

javascript angularjs validation angularjs-ng-repeat

Answer 1

Answer №1

To target only the first item in a list generated by the ng-repeat directive in AngularJS, you can easily use the $first property.

Instead of just using required, you can switch to ng-required with the following syntax:

ng-required="{{$first}}"

By incorporating $first into your validation logic, you can exclude validations for emails beyond the first one!

Check out the updated fiddle

EDIT: Based on my understanding, it seems like you only want to validate the first email input. If you are facing issues where the second email is flagged as invalid even if the first one is incorrect, please review this alternative fiddle with separate validations for each email entry.

Answer 2

To target only the first item in a list generated by the ng-repeat directive in AngularJS, you can easily use the $first property.

Instead of just using required, you can switch to ng-required with the following syntax:

ng-required="{{$first}}"

By incorporating $first into your validation logic, you can exclude validations for emails beyond the first one!

Check out the updated fiddle

EDIT: Based on my understanding, it seems like you only want to validate the first email input. If you are facing issues where the second email is flagged as invalid even if the first one is incorrect, please review this alternative fiddle with separate validations for each email entry.

Answer 3

Answer №2

Delete the section "&& myForm.email1.$dirty" from the "Required span" divider

Answer 4

Delete the section "&& myForm.email1.$dirty" from the "Required span" divider

Answer 5

Answer №3

To successfully implement the ng-repeat loop, it is essential to exclude the initial element and introduce a fresh choice email.

Answer 6

To successfully implement the ng-repeat loop, it is essential to exclude the initial element and introduce a fresh choice email.

Answer 7

Answer №4

To show content only when it is the first item in a list, you can use ng-if="$first"

Here's a sample code snippet to demonstrate this:

var myApp = angular.module('appMy', []);

myApp.controller('myCtrl', function($scope) {
  console.log("hguy");
  $scope.formModel = {};

  $scope.emails = [{
    id: 'email1'
  }];

  $scope.isInputValid = function(input) {

    return input.$dirty && input.$valid;
  }

  $scope.isInputInvalid = function(input) {
    return input.$dirty && input.$invalid;
  }
  
  $scope.addNewChoice = function(val) {


var newItemNo2 = $scope.emails.length+1;
$scope.emails.push({'id':'email'+newItemNo2});


};

});

.help-block {
  color: #b34848;
}

.has-error label {
  color: #a94442;
}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<div class="container" ng-app="appMy">

  <div ng-controller="myCtrl">
    <form novalidate name="myForm">
      <button class="btn btn-info btn-sm" ng-click="addNewChoice()">
        <i class="fa fa-at"></i> Add Email
      </button>
      <br>
      <div class="form-group row">
        <div data-ng-repeat="email in emails">
          <div class="col-md-4 col-sm-12" ng-class="{
                           'has-error'   :isInputInvalid(myForm.email1),
                           'has-success' : isInputValid(myForm.email1)
                       }">
            <label for="email{{ $index + 1}}">Email {{ $index + 1}}</label>
            <input type="email" class="form-control" name="email{{ $index + 1}}" ng-model="formModel.emails[$index + 1]" id="email{{ $index + 1}}" placeholder="Enter email" required>
        <span ng-if="$first" class="help-block" ng-show="myForm.email1.$touched && myForm.email1.$invalid">Required</span>
            <span class="help-block" ng-show="myForm.email{{ $index + 1}}.$error.email">Email not valid!</span>
          </div>
        </div>

      </div>
    </form>
  </div>
</div>

Answer 8

To show content only when it is the first item in a list, you can use ng-if="$first"

Here's a sample code snippet to demonstrate this:

var myApp = angular.module('appMy', []);

myApp.controller('myCtrl', function($scope) {
  console.log("hguy");
  $scope.formModel = {};

  $scope.emails = [{
    id: 'email1'
  }];

  $scope.isInputValid = function(input) {

    return input.$dirty && input.$valid;
  }

  $scope.isInputInvalid = function(input) {
    return input.$dirty && input.$invalid;
  }
  
  $scope.addNewChoice = function(val) {


var newItemNo2 = $scope.emails.length+1;
$scope.emails.push({'id':'email'+newItemNo2});


};

});

.help-block {
  color: #b34848;
}

.has-error label {
  color: #a94442;
}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.8/angular.min.js"></script>
<div class="container" ng-app="appMy">

  <div ng-controller="myCtrl">
    <form novalidate name="myForm">
      <button class="btn btn-info btn-sm" ng-click="addNewChoice()">
        <i class="fa fa-at"></i> Add Email
      </button>
      <br>
      <div class="form-group row">
        <div data-ng-repeat="email in emails">
          <div class="col-md-4 col-sm-12" ng-class="{
                           'has-error'   :isInputInvalid(myForm.email1),
                           'has-success' : isInputValid(myForm.email1)
                       }">
            <label for="email{{ $index + 1}}">Email {{ $index + 1}}</label>
            <input type="email" class="form-control" name="email{{ $index + 1}}" ng-model="formModel.emails[$index + 1]" id="email{{ $index + 1}}" placeholder="Enter email" required>
        <span ng-if="$first" class="help-block" ng-show="myForm.email1.$touched && myForm.email1.$invalid">Required</span>
            <span class="help-block" ng-show="myForm.email{{ $index + 1}}.$error.email">Email not valid!</span>
          </div>
        </div>

      </div>
    </form>
  </div>
</div>

Tips for validating a form in AngularJs when utilizing the ng-repeat directive

Answer №1

Answer №2

Answer №3

Answer №4

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