Wait until the user submits the form before activating Angular validations, and do not display any validation messages if the user deletes text from a text box

Question

Wait until the user submits the form before activating Angular validations, and do not display any validation messages if the user deletes text from a text box

I am looking to implement angular validations that are only triggered after the user clicks on submit. I want the validations to remain hidden if the user removes text from a textbox after submitting it. Here is what I need: - Validations should not be displayed when user initially enters text - Display validations only after user clicks on submit - If user interacts with or removes text from the textbox after submitting, validation messages should not show

Could you please provide a solution for this? Quick responses are appreciated. I would be extremely grateful if you could also include fiddles in your response.

Thank you in advance.

javascript angularjs validation

Answer 1

Answer №1

To tackle this issue, consider utilizing a flag approach. Let's say you have a form with an input field. When the submit button is clicked, set the isSubmitted flag to true. Conversely, when the input field changes, set it to false. Then display your validation message based on the value of this flag. Here's a theoretical controller example:

function myController($scope) {
  $scope.isSubmitted = false;

  $scope.submitForm = function() {
    $scope.isSubmitted = true;
    // Perform other actions here...
  }

  $scope.inputChanged = function() {
    $scope.isSubmitted = false;
  }
}

Incorporate this logic into your view:

<input name="inputField" type="text" ng-model="myModel" ng-change="inputChanged()" required="" />
<span ng-show="form.$error.required && form.$dirty && isSubmitted">Please enter a valid name</span>

Answer 2

To tackle this issue, consider utilizing a flag approach. Let's say you have a form with an input field. When the submit button is clicked, set the isSubmitted flag to true. Conversely, when the input field changes, set it to false. Then display your validation message based on the value of this flag. Here's a theoretical controller example:

function myController($scope) {
  $scope.isSubmitted = false;

  $scope.submitForm = function() {
    $scope.isSubmitted = true;
    // Perform other actions here...
  }

  $scope.inputChanged = function() {
    $scope.isSubmitted = false;
  }
}

Incorporate this logic into your view:

<input name="inputField" type="text" ng-model="myModel" ng-change="inputChanged()" required="" />
<span ng-show="form.$error.required && form.$dirty && isSubmitted">Please enter a valid name</span>

Answer 3

Answer №2

If you're unsure about what you need, take a look at this code snippet which may come in handy.

Here we have a basic form along with its controller and some fields that are validated. In this example, each field is mandatory but no feedback on validation is provided to the user.

The form passes validation only if it's deemed valid and then the submission is recorded with a flag (true/false). If the flag is set to true and the user interacts with any of the fields, all fields are reset.

The Controller

(function(){


    var Controller = function($scope){

        // Parameters
        var isFormSubmitted = false;

        // Methods

        // Shared Methods
        $scope.checkFocus = function(){

            if(!isFormSubmitted){ 
                return;
            }

            // Reset all fields
            $scope.fields = null;

            // Do something

        }

        $scope.validate = function(){

            isFormSubmitted = true;

            // Perform validation here

        };

    };

    Controller.$inject = [
        '$scope'
    ];

    app.controller('MainCtrl', Controller);


})();

The view

<div ng-controller="MainCtrl">


   <form name="form" ng-submit="form.$valid && validate()" novalidate>

        <input ng-focus="checkFocus()" ng-model="fields.username" type="text" required placeholder="Username">
        <input ng-focus="checkFocus()" ng-model="fields.password" type="password" required placeholder="Password">
        <input type="submit" value="Submit">

   </form>


</div>

Answer 4

If you're unsure about what you need, take a look at this code snippet which may come in handy.

Here we have a basic form along with its controller and some fields that are validated. In this example, each field is mandatory but no feedback on validation is provided to the user.

The form passes validation only if it's deemed valid and then the submission is recorded with a flag (true/false). If the flag is set to true and the user interacts with any of the fields, all fields are reset.

The Controller

(function(){


    var Controller = function($scope){

        // Parameters
        var isFormSubmitted = false;

        // Methods

        // Shared Methods
        $scope.checkFocus = function(){

            if(!isFormSubmitted){ 
                return;
            }

            // Reset all fields
            $scope.fields = null;

            // Do something

        }

        $scope.validate = function(){

            isFormSubmitted = true;

            // Perform validation here

        };

    };

    Controller.$inject = [
        '$scope'
    ];

    app.controller('MainCtrl', Controller);


})();

The view

<div ng-controller="MainCtrl">


   <form name="form" ng-submit="form.$valid && validate()" novalidate>

        <input ng-focus="checkFocus()" ng-model="fields.username" type="text" required placeholder="Username">
        <input ng-focus="checkFocus()" ng-model="fields.password" type="password" required placeholder="Password">
        <input type="submit" value="Submit">

   </form>


</div>

Wait until the user submits the form before activating Angular validations, and do not display any validation messages if the user deletes text from a text box

Answer №1

Answer №2

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