Angular 15 Custom Form Validation Example
In this tutorial, we will explain to you how to create custom form validation in angular 15(Angular 15 Custom Form Validation Example). here we will use the Reactive Forms module for custom validation.
Create new angular app
We will create a new angular app using the following command.
1 2 | ng new myapp cd myapp |
Import module in angular
In this step, we need to add a module into the src/app/app.module.ts file.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 | import { BrowserModule } from '@angular/platform-browser'; import { NgModule } from '@angular/core'; import { FormsModule, ReactiveFormsModule } from '@angular/forms'; import { AppComponent } from './app.component'; @NgModule({ declarations: [ AppComponent ], imports: [ BrowserModule, FormsModule, ReactiveFormsModule ], providers: [], bootstrap: [AppComponent] }) export class AppModule { } |
Update view file in angular
In this step, we have created a simple form with some fields. when we click on the submit button at that time check the validation. if validation is false then will be shown an error message.
Read Also: Angular 15 CRUD Application Example Tutorial
src/app/app.component.html
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 | <div class="container"> <h2>Angular 15 Custom Form Validation Example</h2> <form [formGroup]="form" (ngSubmit)="submit()"> <div class="form-group"> <label for="email">Email</label> <input formControlName="email" id="email" type="email" class="form-control"> <div *ngIf="validCheck.email.touched && validCheck.email.invalid" class="alert alert-danger"> <div *ngIf="validCheck.email.errors.required">Email is required.</div> <div *ngIf="validCheck.email.errors.email">Please enter a valid email.</div> </div> </div> <div class="form-group"> <label for="password">Password</label> <input formControlName="password" id="password" type="password" class="form-control"> <div *ngIf="validCheck.password.touched && validCheck.password.invalid" class="alert alert-danger"> <div *ngIf="validCheck.password.errors.required">Password is required.</div> <div *ngIf="validCheck.password.errors.minlength">Password must be at least 6 characters</div> </div> </div> <button class="btn btn-primary" type="submit">Submit</button> </form> </div> |
Update component in angular
src/app/app.component.ts
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 | 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({ email: new FormControl('', [Validators.required, Validators.email]), password: new FormControl('',[ Validators.required, , Validators.minLength(6)]) }); get validCheck(){ return this.form.controls; } submit(){ console.log(this.form.value); } } |
Run Our Angular Application
Now we will run our Angular application using the below command.
1 | ng serve |
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