Angular 14 Reactive Forms Validation Tutorial Example

Angular 14 Reactive Forms Validation Tutorial Example

Angular 14 reactive form validation; In this tutorial, we will learn how to use reactive form and validation in angular 14 apps.

Angular 14 Reactive Forms Validation Tutorial Example

Just use the following steps to create a reactive Form with validation in the angular 14 apps:

  • Step 1 – Create New Angular App
  • Step 2 – Import Form Module
  • Step 3 – Create Reactive Form in View File
  • Step 4 – Update Component ts File
  • Step 5 – Start Angular App

Step 1 – Create New Angular App

First of all, open your terminal and execute the following command on it to install angular app:

ng new my-new-app

Step 2 – Import Module

Visit src/app/ directory and open app.module.ts file. Then import HttpClientModule, FormsModule and ReactiveFormsModule in this file, as follows:

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
  
import { AppComponent } from './app.component';
import { FormsModule, ReactiveFormsModule } from '@angular/forms';
  
@NgModule({
  declarations: [
    AppComponent
  ],
  imports: [
    BrowserModule,
    FormsModule,
    ReactiveFormsModule
  ],
  providers: [],
  bootstrap: [AppComponent]
})
export class AppModule { }

Step 3 – Create Reactive Form in View File

Create simple reactive form with input file element. So, visit src/app directory and open app.component.html file. Then update the following code into it for simple reactive form in angular apps; as follows:

<h1>Angular 14 Reactive Forms Validation Example - Tutsmake.com</h1>
    
<form [formGroup]="form" (ngSubmit)="submit()">
        
    <div class="form-group">
        <label for="name">Name</label>
        <input 
            formControlName="name"
            id="name" 
            type="text" 
            class="form-control">
        <div *ngIf="f['name'].touched && f['name'].invalid" class="alert alert-danger">
            <div *ngIf="f['name'].errors && f['name'].errors['required']">Name is required.</div>
            <div *ngIf="f['name'].errors && f['name'].errors['minlength']">Name should be 3 character.</div>
        </div>
    </div>
     
    <div class="form-group">
        <label for="email">Email</label>
        <input 
            formControlName="email"
            id="email" 
            type="text" 
            class="form-control">
        <div *ngIf="f['email'].touched && f['email'].invalid" class="alert alert-danger">
            <div *ngIf="f['email'].errors && f['email'].errors['required']">Email is required.</div>
            <div *ngIf="f['email'].errors && f['email'].errors['email']">Please, enter valid email address.</div>
        </div>
    </div>
     
    <div class="form-group">
        <label for="body">Body</label>
        <textarea 
            formControlName="body"
            id="body" 
            type="text" 
            class="form-control">
        </textarea>
        <div *ngIf="f['body'].touched && f['body'].invalid" class="alert alert-danger">
            <div *ngIf="f['body'].errors && f['body'].errors['required']">Body is required.</div>
        </div>
    </div>
    
    <button class="btn btn-primary" [disabled]="form.invalid" type="submit">Submit</button>
</form>

Note that:- In the above form, have used bootstrap 5 classes. if you want to add than then; you can see the following article for that; as follow:

Step 4 – Update Component ts File

Visit the src/app directory and open app.component.ts. Then add the following code like formGroup and formControl element on component.ts file:

import { Component } from '@angular/core';
import { FormGroup, FormControl, Validators} from '@angular/forms';
  
@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  
  form = new FormGroup({
    name: new FormControl('', [Validators.required, Validators.minLength(3)]),
    email: new FormControl('', [Validators.required, Validators.email]),
    body: new FormControl('', Validators.required)
  });
  
  get f(){
    return this.form.controls;
  }
  
  submit(){
    console.log(this.form.value);
  }
  
}

Step 5 – Start Angular App

In this step, execute the following command on terminal to start angular app:

ng serve

Open browser, enter the below url:

http://localhost:4200

Conclusion

Ultimately, this tutorial is over. Using this profound guide, now you can create an angular form with reactive forms and validate using reactive forms validator API. I guess you would love this tutorial and propel forward to other developer friends.

AuthorAdmin

My name is Devendra Dode. I am a full-stack developer, entrepreneur, and owner of Tutsmake.com. I like writing tutorials and tips that can help other developers. I share tutorials of PHP, Python, Javascript, JQuery, Laravel, Livewire, Codeigniter, Node JS, Express JS, Vue JS, Angular JS, React Js, MySQL, MongoDB, REST APIs, Windows, Xampp, Linux, Ubuntu, Amazon AWS, Composer, SEO, WordPress, SSL and Bootstrap from a starting stage. As well as demo example.

One reply to Angular 14 Reactive Forms Validation Tutorial Example

  1. Thanks for the simple tutorial

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