Angular 15 Template Driven Form Validation Example

Hello Dev,

In this tute, we will discuss angular 15 template driven forms. you will learn template-driven form validation in angular 15. This tutorial will give you a simple example of angular 15 template-driven forms. step by step explain angular 15 form validation on submit. Let's get started with template driven form in angular 15 example.

Angular 15 provides forms and they provide a way to handle user input using ngModel, ngSubmit. Angular 15 provide Template-driven forms and using Template Driven Forms you can create very simple and basic level form.

If you have a simple and basic form in your angular 15 application then I will prefer to use Template Driven Forms in angular. here I write a simple example of Template Driven Forms with validation in angular 15.

You need to follow the below step to create template driven form in angular 15.

Step 1: Install Angular App

Here, in this step, you need to create a new ng app for this demo. if you have already created then don't create a new angular 15 app.

ng new my-new-app

Step 2: Import FormsModule

If you want to create a form in the angular app then you need to import FormsModule from @angular/forms library. so let's add the following code to the app.module.ts file.

src/app/app.module.ts

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

Step 3: Form with ngModel

In this step, we will write the code of the HTML form with ngModel. so add the following code to the app.component.html file.

I used bootstrap class on this form. if you want to add that then follow this link too: Install Bootstrap 5 to Angular 15.

src/app/app.component.html

<h1>Template Driven Forms Validation in Angular 15 Example - ItSolutionStuff.com</h1>
    
<form #contactForm="ngForm" (ngSubmit)="submit(contactForm.value)">
     
  <div class="form-group">
      <label for="firstName">First Name</label>
      <input required minlength="3" maxlength="10" ngModel name="firstName" type="text" #firstName="ngModel" class="form-control" id="firstName">
      <div class="alert alert-danger" *ngIf="firstName.touched && !firstName.valid">
          <div *ngIf="firstName.errors && firstName.errors['required']">First Name is required.</div>
          <div *ngIf="firstName.errors && firstName.errors['minlength']">First Name is minimum {{ firstName.errors && firstName.errors['minlength'].requiredLength }} character.</div>
          <div *ngIf="firstName.errors && firstName.errors['maxlength']">First Name is maximum 10 character.</div>
      </div>
  </div>
     
  <div class="form-group">
      <label for="lastName">Last Name</label>
      <input required ngModel name="lastName" type="text" #lastName="ngModel" class="form-control" id="lastName">
      <div class="alert alert-danger" *ngIf="lastName.touched && !lastName.valid">
          Last Name is required.
      </div>
  </div>
     
  <div class="form-group">
      <label for="comment">Comment</label>
      <textarea required ngModel #comment="ngModel" name="comment" id="comment" cols="30" rows="10" class="form-control"></textarea>
      <div class="alert alert-danger" *ngIf="comment.touched && !comment.valid">
          Comment is required.
      </div>
  </div>
      
  <button class="btn btn-primary" type="submit" [class.disabled]="!contactForm.valid">Submit</button>
    
</form>

Step 4: updated Ts File

In its file. we will write submit() and get all input field values. so let's add the following code to the app.component.ts file.

src/app/app.component.ts

import { Component } from '@angular/core';
   
@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  
  submit(form:any){
    var firstName = form.firstName;
    console.log(firstName);
  
    var lastName = form.lastName;
    console.log(lastName);
  
    var comment = form.comment;
    console.log(comment);
  }
  
}

Run Angular App:

All the required steps have been done, now you have to type the given below command and hit enter to run the Angular app:

ng serve

Now, Go to your web browser, type the given URL and view the app output:

http://localhost:4200

Output:

Now you can see layout as like bellow screen shot:

I hope it can help you...