Angular Formcontrols Validation

This library was generated with Angular CLI version 15.0.0.

These packages create validation for form controls, providing a space using Angular's AbstractControl and validation. These validations are customizable and reusable, allowing us to add new errors to the package and change the pattern for validation.

Client-side Validation should be simple and clean. Don't let Client-side Validation dirty your controller.

Setup your Validation on config phase by using some rules (example) If you prefer schema over html attributes , try Angular Formscontrols Validation (Demo) And add Validation in your view only.

Requirement

Angular 11.0.0 (for AngularFormcontrolsValidation 0.0.1) Angular 12.0.0 (for AngularFormcontrolsValidation 0.0.2) Angular 13.0.0 (for AngularFormcontrolsValidation 0.0.5) Angular 14.0.0 (for AngularFormcontrolsValidation 0.0.5) Angular 15.0.0 (for AngularFormcontrolsValidation 0.0.6)

DEMO

Stackblitz link : https://stackblitz.com/edit/angular-app-initialize-ygbbd6?file=src%2Fapp%2Fapp.component.html

This is Stackblitz link.

Installation

npm i angular-formcontrols-validation

Using Angular Formcontrols Validation

1. Import Angular Forms Controls Validation

In the module where you want to use the Angular Formcontrols Validation, import the Angular Formcontrols Validation as follows:

import {AngularFormcontrolsValidationService} from 'angular-formcontrols-validation';

2. Configuration

To configure the validation messages, you need to perform the following steps:

constructor(private validation:AngularFormcontrolsValidationService) { }

Step 2.1

 this.signupForm = this.fb.group({
     fullName: ['', [Validators.required,this.validateService.nameFieldCheck( )]],})

3. Usage in templates

Now, in your component's template, you can use the ValidationMessagesComponent to display the validation messages.

Step 1

this.signupForm = this.fb.group({
      fullName: ['', [Validators.required, this.validation.nameFieldCheck()]],
      mobileNumber: ['', [Validators.required, this.validation.numberValidation()]],
      email: ['', [Validators.required, this.validation.emailValidation()]],
      dob: ['', [Validators.required, this.validation.futureDaterestrict()]],
      password: ['', [Validators.required, this.validation.passwordValidation()]],
      cpass: ['', [Validators.required, this.validation.passwordValidation()]],
    },
       {
        validators: this.validation.confirmPasswordValidators(),
      }),

after importing and declaring in the constructor. When you need a FormGroup, just call the local name and get a particular function to add it to your form controls. This way, it checks using abstract control and then gives errors in the form controls if there are any.

 <div class="text-danger" *ngIf="form['fullName'].invalid && (form['fullName'].dirty || form['fullName'].touched)">
  <small class="required-field " *ngIf="form['fullName'].errors?.['required']">Name is required.</small></div>

When an error occurs, we can throw default errors in form control errors. For example, the error added to the form control will then be thrown in the template

Message

Regex pattern used ^[^\s$&*!#^@]+@[^\s@]+.([^\s@]{2,3})+$ Message key will throw an error if there is an Regex Error in the entered EmailID.

Propert	Definition
nameFieldCheck	This function alidates name fields, ensuring that the first character is not a whitespace and validate special character. (example:nameFieldCheck(value))
emailValidation	This function validates a valid email using regex. (example:emailValidation(value))
numberValidation	This function checks a number field for minimum and maximum length. (example:numberValidation(value))
passwordValidation	This function validates strong passwords, ensuring there are no whitespace characters, and checks for both minimum and maximum password lengths. Additionally, it uses regex to verify the strength of the password. (example:passwordValidation(value))
confirmPasswordValidators	This function checks whether the new password and the confirm password values are the same. (example:confirmPasswordValidators(value1,value2))
value	The parameter type for this function is now set to 'any' for the value (example:passwordValidation(value))
value1,value2	Two values are present: value1 represents the new password, and value2 represents the confirm password.(example:confirmPasswordValidators(value1,value2))

Regex

Regex	Definition
name field	This regex validates the presence of special characters in a name field. (example: /^[A-Za-z' -.]+$/ )
email pattern	This regex validates the correct email pattern. (example:/^(([^<>()[]\.,;:\s@"]+(.[^<>()[]\.,;:\s@"]+)*)
Specialcharacter	This regex checks for a strong password in password fields.(example:/^(?=[^a-z][a-z])(?=[^A-Z][A-Z])(?=\D*\d)(?=[^@$!%*#?&][@$!%#?&])[A-Za-z\d@$!%#?&]$/)

Code scaffolding

Run ng generate component component-name --project angular-inputs-validation to generate a new component. You can also use ng generate directive|pipe|service|class|guard|interface|enum|module --project angular-inputs-validation.

Note: Don't forget to add --project angular-inputs-validation or else it will be added to the default project in your angular.json file.

Build

Run ng build angular-inputs-validation to build the project. The build artifacts will be stored in the dist/ directory.

Publishing

After building your library with ng build angular-inputs-validation, go to the dist folder cd dist/angular-inputs-validation and run npm publish.

Running unit tests

Run ng test angular-inputs-validation to execute the unit tests via Karma.