Unveiling the secrets of Angular ng-messages: Tips for validating password confirmation!

Question

Unveiling the secrets of Angular ng-messages: Tips for validating password confirmation!

THE ISSUE:

Incorporating the ng-messages directive for real-time validation in my angular application has been successful so far. However, I am facing a challenge with validating the 'password confirmation' field.

CODE SNIPPET:

<form name="autentication_form" novalidate="" ng-submit="submit_register()">

    <label class="item item-input">
        <span class="input-label">Email</span>
        <input type="text" name="email" ng-model="registerData.email" required>

        <div class="form-errors" ng-messages="autentication_form.email.$error" role="alert" ng-if='autentication_form.email.$dirty'>
            <div class="form-error" ng-message="required">You did not input your email address</div>
        </div>
    </label>

    <label class="item item-input">
        <span class="input-label">Password</span>
        <input type="password" name="password" ng-model="registerData.password" required>

        <div class="form-errors" ng-messages="autentication_form.password.$error" role="alert" ng-if='autentication_form.password.$dirty'>
            <div class="form-error" ng-message="required">Please enter your password</div>
        </div>
    </label>

    <label class="item item-input">
        <span class="input-label">Confirm Password</span>
        <input type="password" name="password_confirmation" ng-model="registerData.password_confirmation" required>

        <div class="form-errors" ng-messages="autentication_form.password_confirmation.$error" role="alert" ng-if='autentication_form.password_confirmation.$dirty'>
            <div class="form-error" ng-message="required">Please confirm your password</div>
        </div>
    </label>

</form>

THE QUERY:

Is there a way to verify if the password confirmation matches using ng-messages?

javascript angularjs validation ionic-framework ng-messages

Answer 1

Answer №1

The best way to handle this situation is by implementing a pattern. It has proven to be effective for me!

<input type="password" name="new_password1" ng-model="new_password1">

<input type="password" name="new_password2" ng-pattern="\b{{new_password1}}\b" ng-model="new_password2">
<div ng-messages="passwordForm.new_password2.$error">
    <div ng-message="pattern">Passwords do not match!</div>
</div>

Answer 2

The best way to handle this situation is by implementing a pattern. It has proven to be effective for me!

<input type="password" name="new_password1" ng-model="new_password1">

<input type="password" name="new_password2" ng-pattern="\b{{new_password1}}\b" ng-model="new_password2">
<div ng-messages="passwordForm.new_password2.$error">
    <div ng-message="pattern">Passwords do not match!</div>
</div>

Answer 3

Answer №2

To effectively manage the password and password confirmation inputs, utilizing a directive is the recommended approach.

Consider this solution:

angular.module('app', ['ngMessages'])

.controller('ctrl', function($scope) {
  $scope.registerData = {};
})


.directive('confirmPwd', function($interpolate, $parse) {
  return {
    require: 'ngModel',
    link: function(scope, elem, attr, ngModelCtrl) {

      var pwdToMatch = $parse(attr.confirmPwd);
      var pwdFn = $interpolate(attr.confirmPwd)(scope);

      scope.$watch(pwdFn, function(newVal) {
          ngModelCtrl.$setValidity('password', ngModelCtrl.$viewValue == newVal);
      })

      ngModelCtrl.$validators.password = function(modelValue, viewValue) {
        var value = modelValue || viewValue;
        return value == pwdToMatch(scope);
      };

    }
  }
});

<html ng-app="app">

<head>
  <script data-require="angular.js@~1.4.3" data-semver="1.4.3" src="https://code.angularjs.org/1.4.3/angular.js"></script>
  <script data-require="<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="62030c05170e03104f0f0711110305071122534c564c51">[email protected]</a>" data-semver="1.4.3" src="https://code.angularjs.org/1.4.3/angular-messages.js"></script>
  <script src="https://code.angularjs.org/1.3.15/angular.js"></script>
  <script src="script.js"></script>
</head>

<body ng-controller="ctrl">
  <form name="autentication_form" novalidate="" ng-submit="submit_register()">
    <label class="item item-input">
      <span class="input-label">Email</span>
      <input type="text" name="email" ng-model="registerData.email" required="" />
      <div class="form-errors" ng-messages="autentication_form.email.$error" ng-if='autentication_form.email.$touched'>
        <span class="form-error" ng-message="required">You did not enter the email</span>
      </div>
    </label>
    <label class="item item-input">
      <span class="input-label">Password</span>
      <input type="password" name="password" ng-model="registerData.password" required />
      <div class="form-errors" ng-messages="autentication_form.password.$error" ng-if='autentication_form.password.$touched'>
        <span class="form-error" ng-message="required">Please enter the password</span>
      </div>
    </label>
    <label class="item item-input">
      <span class="input-label">Password confirmation</span>
      <input type="password" name="password_confirmation" ng-model="registerData.password_confirmation" required="" confirm-pwd="registerData.password" />
      <div class="form-errors" ng-messages="autentication_form.password_confirmation.$error" ng-if='autentication_form.password_confirmation.$touched'>
        <span class="form-error" ng-message="required">Password confirmation required</span>
        <span class="form-error" ng-message="password">Password different</span>
      </div>
    </label>
  </form>
</body>

</html>

Answer 4

To effectively manage the password and password confirmation inputs, utilizing a directive is the recommended approach.

Consider this solution:

angular.module('app', ['ngMessages'])

.controller('ctrl', function($scope) {
  $scope.registerData = {};
})


.directive('confirmPwd', function($interpolate, $parse) {
  return {
    require: 'ngModel',
    link: function(scope, elem, attr, ngModelCtrl) {

      var pwdToMatch = $parse(attr.confirmPwd);
      var pwdFn = $interpolate(attr.confirmPwd)(scope);

      scope.$watch(pwdFn, function(newVal) {
          ngModelCtrl.$setValidity('password', ngModelCtrl.$viewValue == newVal);
      })

      ngModelCtrl.$validators.password = function(modelValue, viewValue) {
        var value = modelValue || viewValue;
        return value == pwdToMatch(scope);
      };

    }
  }
});

<html ng-app="app">

<head>
  <script data-require="angular.js@~1.4.3" data-semver="1.4.3" src="https://code.angularjs.org/1.4.3/angular.js"></script>
  <script data-require="<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="62030c05170e03104f0f0711110305071122534c564c51">[email protected]</a>" data-semver="1.4.3" src="https://code.angularjs.org/1.4.3/angular-messages.js"></script>
  <script src="https://code.angularjs.org/1.3.15/angular.js"></script>
  <script src="script.js"></script>
</head>

<body ng-controller="ctrl">
  <form name="autentication_form" novalidate="" ng-submit="submit_register()">
    <label class="item item-input">
      <span class="input-label">Email</span>
      <input type="text" name="email" ng-model="registerData.email" required="" />
      <div class="form-errors" ng-messages="autentication_form.email.$error" ng-if='autentication_form.email.$touched'>
        <span class="form-error" ng-message="required">You did not enter the email</span>
      </div>
    </label>
    <label class="item item-input">
      <span class="input-label">Password</span>
      <input type="password" name="password" ng-model="registerData.password" required />
      <div class="form-errors" ng-messages="autentication_form.password.$error" ng-if='autentication_form.password.$touched'>
        <span class="form-error" ng-message="required">Please enter the password</span>
      </div>
    </label>
    <label class="item item-input">
      <span class="input-label">Password confirmation</span>
      <input type="password" name="password_confirmation" ng-model="registerData.password_confirmation" required="" confirm-pwd="registerData.password" />
      <div class="form-errors" ng-messages="autentication_form.password_confirmation.$error" ng-if='autentication_form.password_confirmation.$touched'>
        <span class="form-error" ng-message="required">Password confirmation required</span>
        <span class="form-error" ng-message="password">Password different</span>
      </div>
    </label>
  </form>
</body>

</html>

Answer 5

Answer №3

During the development process, there may be a need to implement custom validation checks in order to ensure the accuracy of form data. Instead of creating specific checks for every scenario, it is advisable to follow a general guideline. Take a look at the use-form-error directive for reference.

You can also view a live example on jsfiddle.

angular.module('ExampleApp', ['use', 'ngMessages'])
  .controller('ExampleController', function($scope) {

  });

.errors {
  color: maroon
}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.9/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.9/angular-messages.min.js"></script>
<script src="https://cdn.rawgit.com/Stepan-Kasyanenko/use-form-error/master/src/use-form-error.js"></script>

<div ng-app="ExampleApp">
  <div ng-controller="ExampleController">

    <form name="ExampleForm">
      <label>Password</label>
      <input ng-model="password" required />
      <br>
      <label>Confirm password</label>
      <input ng-model="confirmPassword" name="confirmPassword" use-form-error="isNotSame" use-error-expression="password && confirmPassword && password!=confirmPassword" required />
      <div ng-show="ExampleForm.$error.isNotSame" class="errors">Passwords Do Not Match!</div>
      <div ng-messages="ExampleForm.confirmPassword.$error" class="errors">
        <div ng-message="isNotSame">
          Passwords Do Not Match (from ng-message)!
        </div>
      </div>
    </form>

  </div>
</div>

Answer 6

During the development process, there may be a need to implement custom validation checks in order to ensure the accuracy of form data. Instead of creating specific checks for every scenario, it is advisable to follow a general guideline. Take a look at the use-form-error directive for reference.

You can also view a live example on jsfiddle.

angular.module('ExampleApp', ['use', 'ngMessages'])
  .controller('ExampleController', function($scope) {

  });

.errors {
  color: maroon
}

<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.9/angular.min.js"></script>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.4.9/angular-messages.min.js"></script>
<script src="https://cdn.rawgit.com/Stepan-Kasyanenko/use-form-error/master/src/use-form-error.js"></script>

<div ng-app="ExampleApp">
  <div ng-controller="ExampleController">

    <form name="ExampleForm">
      <label>Password</label>
      <input ng-model="password" required />
      <br>
      <label>Confirm password</label>
      <input ng-model="confirmPassword" name="confirmPassword" use-form-error="isNotSame" use-error-expression="password && confirmPassword && password!=confirmPassword" required />
      <div ng-show="ExampleForm.$error.isNotSame" class="errors">Passwords Do Not Match!</div>
      <div ng-messages="ExampleForm.confirmPassword.$error" class="errors">
        <div ng-message="isNotSame">
          Passwords Do Not Match (from ng-message)!
        </div>
      </div>
    </form>

  </div>
</div>

Answer 7

Answer №4

This is the technique I used to implement validation with ng-pattern:

<md-input-container class="md-block">
  <label>Enter New Password</label>
  <input ng-model="user.password" name="password" type="password" required ng-pattern="'.{8,}'" />
  <div ng-messages="form.password.$error">
    <div ng-message="required">Password is required.</div>
    <div ng-message="pattern">Password must be a minimum of 8 characters long.</div>
  </div>
</md-input-container>
<md-input-container class="md-block">
  <label>Confirm Password</label>
  <input ng-model="user.confirmPassword" name="confirmPassword" type="password" ng-pattern="user.password|escapeRegex" required />
  <div ng-messages="form.confirmPassword.$error">
    <div ng-message="required">Confirmation password is required.</div>
    <div ng-message="pattern">Passwords do not match.</div>
  </div>
</md-input-container>

A filter was also created to convert the regex in ng-pattern to a literal form:

module.filter('escapeRegex', function(){
  return function(str){
    return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
  }
});

Answer 8

This is the technique I used to implement validation with ng-pattern:

<md-input-container class="md-block">
  <label>Enter New Password</label>
  <input ng-model="user.password" name="password" type="password" required ng-pattern="'.{8,}'" />
  <div ng-messages="form.password.$error">
    <div ng-message="required">Password is required.</div>
    <div ng-message="pattern">Password must be a minimum of 8 characters long.</div>
  </div>
</md-input-container>
<md-input-container class="md-block">
  <label>Confirm Password</label>
  <input ng-model="user.confirmPassword" name="confirmPassword" type="password" ng-pattern="user.password|escapeRegex" required />
  <div ng-messages="form.confirmPassword.$error">
    <div ng-message="required">Confirmation password is required.</div>
    <div ng-message="pattern">Passwords do not match.</div>
  </div>
</md-input-container>

A filter was also created to convert the regex in ng-pattern to a literal form:

module.filter('escapeRegex', function(){
  return function(str){
    return str.replace(/[\-\[\]\/\{\}\(\)\*\+\?\.\\\^\$\|]/g, "\\$&");
  }
});

Answer 9

Answer №5

ngMessage is a useful tool that works by assigning $error.message_field_name to the corresponding field in the form object within the scope. For example, if your form name is authentication_form and the field name is password_confirmation, you can set $scope.authentication_form.password_confirmation.$error.nomatch to true in order to display an error message like "Doesn't match".

Here is an example of how to implement it in your markup:

<input type="password" name="password_confirmation" ng-model="registerData.password_confirmation" required />

<div ng-messages="authentication_form.password_confirmation.$error">
                <div ng-message="required">Please repeat your password.</div>
                <div ng-message="nomatch">Doesn't match.</div>
            </div>
</div>

This code snippet shows a simple way to compare both passwords:

$scope.$watch("registerData.password + registerData.password_confirmation", function () {
            $scope.authentication_form.password_confirmation.$error.nomatch = $scope.registerData.password !== $scope.registerData.password_confirmation;
        });

Answer 10

ngMessage is a useful tool that works by assigning $error.message_field_name to the corresponding field in the form object within the scope. For example, if your form name is authentication_form and the field name is password_confirmation, you can set $scope.authentication_form.password_confirmation.$error.nomatch to true in order to display an error message like "Doesn't match".

Here is an example of how to implement it in your markup:

<input type="password" name="password_confirmation" ng-model="registerData.password_confirmation" required />

<div ng-messages="authentication_form.password_confirmation.$error">
                <div ng-message="required">Please repeat your password.</div>
                <div ng-message="nomatch">Doesn't match.</div>
            </div>
</div>

This code snippet shows a simple way to compare both passwords:

$scope.$watch("registerData.password + registerData.password_confirmation", function () {
            $scope.authentication_form.password_confirmation.$error.nomatch = $scope.registerData.password !== $scope.registerData.password_confirmation;
        });

Answer 11

Answer №6

i utilized only Ionic (HTML) validations for this task.

New Password New Password field must not be left empty

<label class="item item-input inputRadius">
<span class="input-label">Confirm Password</span>
<input type="password" placeholder="Confirm Password" ng-model="passwordUpdateInfo.confirmPassword" name="confirmPassword" required>
</label>
<div ng-show="passwordUpdateForm.$submitted || passwordUpdateForm.confirmPassword.$touched">
<div ng-show="passwordUpdateForm.confirmPassword.$error.required" class="errorMessage">Please enter a Confirm Password</div>
</div>
<div ng-show="passwordUpdateInfo.confirmPassword.length > 0 && passwordUpdateInfo.confirmPassword != passwordUpdateInfo.newPassword">
    Passwords do not match..(amar from india)
</div>
<button class="button button-positive button-block" ng-disabled="passwordUpdateInfo.confirmPassword.length > 0 && passwordUpdateInfo.confirmPassword != passwordUpdateInfo.newPassword">Update</button>

Answer 12

i utilized only Ionic (HTML) validations for this task.

New Password New Password field must not be left empty

<label class="item item-input inputRadius">
<span class="input-label">Confirm Password</span>
<input type="password" placeholder="Confirm Password" ng-model="passwordUpdateInfo.confirmPassword" name="confirmPassword" required>
</label>
<div ng-show="passwordUpdateForm.$submitted || passwordUpdateForm.confirmPassword.$touched">
<div ng-show="passwordUpdateForm.confirmPassword.$error.required" class="errorMessage">Please enter a Confirm Password</div>
</div>
<div ng-show="passwordUpdateInfo.confirmPassword.length > 0 && passwordUpdateInfo.confirmPassword != passwordUpdateInfo.newPassword">
    Passwords do not match..(amar from india)
</div>
<button class="button button-positive button-block" ng-disabled="passwordUpdateInfo.confirmPassword.length > 0 && passwordUpdateInfo.confirmPassword != passwordUpdateInfo.newPassword">Update</button>

Unveiling the secrets of Angular ng-messages: Tips for validating password confirmation!

Answer №1

Answer №2

Answer №3

Answer №4

Answer №5

Answer №6

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