Creating a bespoke validation in AngularJS to verify if the selected date falls within a specific range of weekdays

Question

Creating a bespoke validation in AngularJS to verify if the selected date falls within a specific range of weekdays

Hey there! I'm looking to enhance the validation process for a date input field in a unique manner.

Currently, my default validation setup looks like this:

<div>
  <input type="text" name="firstName" ng-model="appointmentForm.firstName" ng-minlength=2 required>
</div>
<div role="alert">
  <span class="error" ng-if="submitted && form.firstName.$error.minlength" >
    Please enter a valid first name
  </span>
</div>
...

Now, I want to implement a validator that checks if the selected date falls between Tuesday and Sunday. Here's an example of what I'm aiming for:

<input type="date" name="date" ng-model="appointmentForm.date" validate-weekday>

Could someone guide me on how to set up this custom validator on the Angular side?

javascript angularjs validation

Answer 1

Answer №1

Embarking on the right path means starting with a directive that adds a validation handler to the validator collection using your own logic.

To help you get started, I've provided some sample code that you can use as a template. Remember to customize the validation code to fit your specific business requirements.

app.directive('validateWeekday', [function () {

    function validate(value) {
        //replace me with correct logic
        return value == 'this is valid';
    }

    return {
        restrict: 'A',
        require: 'ngModel',
        link: function (scope, ele, attrs, ngModel) {
            ngModel.$validators.invalidWeekday = function (modelValue) {
                return validate(modelValue);
            }
        }
    }
}]);

Here's an example of how you might use this in your HTML:

<form name="appointmentForm">
    <input type="text" name="dateOfPurchase" ng-model="dateOfPurchase" validate-weekday>
    <div class="error-message" ng-show="appointmentForm.dateOfPurchase.$error.invalidWeekday">Valid date is required.</div>
</form>

Don't forget to explore ngMessages and other validation features in Angular 1.3 for a more refined and elegant code structure.

Answer 2

Embarking on the right path means starting with a directive that adds a validation handler to the validator collection using your own logic.

To help you get started, I've provided some sample code that you can use as a template. Remember to customize the validation code to fit your specific business requirements.

app.directive('validateWeekday', [function () {

    function validate(value) {
        //replace me with correct logic
        return value == 'this is valid';
    }

    return {
        restrict: 'A',
        require: 'ngModel',
        link: function (scope, ele, attrs, ngModel) {
            ngModel.$validators.invalidWeekday = function (modelValue) {
                return validate(modelValue);
            }
        }
    }
}]);

Here's an example of how you might use this in your HTML:

<form name="appointmentForm">
    <input type="text" name="dateOfPurchase" ng-model="dateOfPurchase" validate-weekday>
    <div class="error-message" ng-show="appointmentForm.dateOfPurchase.$error.invalidWeekday">Valid date is required.</div>
</form>

Don't forget to explore ngMessages and other validation features in Angular 1.3 for a more refined and elegant code structure.

Creating a bespoke validation in AngularJS to verify if the selected date falls within a specific range of weekdays

Answer №1

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