Template Driven Forms Validation in Angular 8 Example

By Hardik Savani | November 22, 2019 | | 1391 Viewer | Category : AngularJS


Here is a angular 8 template driven form validation example. i would like to give you example of how to create template driven form in angular 8. i will give you simple example of template driven form validation in angular 8.

Angular 8 provide forms and they provide way to handle user input using ngModel, ngSubmit. Angular 8 provide Template-driven froms and using Template Driven Forms you can create very simple and basic level form.

If you have simple and basic form in your angular 8 application then i will prefer to use Template Driven Forms in angular. here i write simple example of Template Driven Forms with validation in angular 8.

You need to follow bellow step to create template driven form in angular 8.

Step 1: Install Angular App

Here, in this step you need to create new ng app for this demo. if you have already created then don't create new angular 8 app.

ng new my-new-app

Step 2: Import FormsModule

If you want to create form in angular app then you need to import FormsModule from @angular/forms library. so let's add following code to 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 code of html form with ngModel. so add following code to app.component.html file.

I used bootstrap class on this form. if you want to add than then follow this link too: Install Boorstrap 4 to Angular 8.

src/app/app.component.html

<h1>Template Driven Forms Validation in Angular 8 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.required">First Name is required.</div>

<div *ngIf="firstName.errors.minlength">First Name is minimum {{ firstName.errors.minlength.requiredLength }} character.</div>

<div *ngIf="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 && !firstName.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 ts file. we will write submit() and get all input fields values. so let's add following code to 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){

var firstName = form.firstName;

console.log(firstName);

var lastName = form.lastName;

console.log(lastName);

var comment = form.comment;

console.log(comment);

}

}

Now you can run your application using following command:

ng serve

Now you can see layout as like bellow screen shot:

I hope it can help you...




Hardik Savani
My name is Hardik Savani. I'm a full-stack developer, entrepreneur and owner of Aatman Infotech. I live in India and I love to write tutorials and tips that can help to other artisan. I am a big fan of PHP, Javascript, JQuery, Laravel, Codeigniter, VueJS, AngularJS and Bootstrap from the early stage.
Follow Me: Github Twitter
***Do you want me hire for your Project Work? Then Contact US.

We are Recommending you: