Categories

1 Answer

Sep 13, 2019
Template-driven Forms

Template-driven forms can be used for many applications i.e. log in, submit a request, place an order, data entry etc.

Now, let's create the form. Follow these steps:

Create a project

First, create a new project named angular-forms by using the following command:

ng new angular-forms   

Now, go to the project folder by using the following command.

cd angular-forms  

Now, use the Angular CLI command ng generate class Hero to generate a new class named Hero:

ng generate class Hero  

Template-driven Forms

Go to your project folder angular-forms and open the hero.ts file under the app module. Write the following code:

export class Hero {  

  constructor(  

    public id: number,  

    public name: string,  

    public power: string,  

    public alterEgo?: string  

  ) {  }  

}  

The TypeScript compiler generates a public field for each public constructor parameter and when you create new heroes, it automatically assign the parameter's value to that field.

Here, alterEgo is optional and the constructor can omit it.

Create a Form component

An Angular form consists of two parts:

HTML based template

A component class to handle data and users

Now, generate a new component named HeroForm by using the following command:

ng generate component HeroForm   

Template-driven Forms

Write down the following code in hero-form.component.ts

import { Component } from '@angular/core';  

import { Hero }    from '../hero';  

@Component({  

  selector: 'app-hero-form',  

  templateUrl: './hero-form.component.html',  

  styleUrls: ['./hero-form.component.css']  

})  

export class HeroFormComponent {  

  powers = ['Really Smart', 'Super Flexible',  

            'Super Hot', 'Weather Changer'];  

  model = new Hero(18, 'Dr IQ', this.powers[0], 'Chuck Overstreet');  

  submitted = false;  

  onSubmit() { this.submitted = true; }  

  // TODO: Remove this when we're done  

  get diagnostic() { return JSON.stringify(this.model); }  

}  

Revise app.module.ts file

The app.module.ts file is used to define the application's root module. The template-driven forms reside in their own module. You need to add the FormsModule to the array of imports for the application module before using forms.

Use the following code inside app.module.ts file:

import { NgModule }      from '@angular/core';  

import { BrowserModule } from '@angular/platform-browser';  

import { FormsModule }   from '@angular/forms';  

import { AppComponent }  from './app.component';  

import { HeroFormComponent } from './hero-form/hero-form.component';  

@NgModule({  

  imports: [  

    BrowserModule,  

    FormsModule  

  ],  

  declarations: [  

    AppComponent,  

    HeroFormComponent  

  ],  

  providers: [],  

  bootstrap: [ AppComponent ]  

})  

export class AppModule { }  

Here, we have imported FormsModule and added the FormsModule to the list of imports defined in the @NgModule decorator. This is used to access the application to all of the template-driven forms features, including ngModel.

Revise app.component.html file

The app.component.html is used to host the new HeroFormComponent. It is the application's root component. Write the following code in app.component.html
Click here to read more about Angular JS
Click here to read more about Insurance

Related questions

Madanswer
Sep 13, 2019 in Angular
Sep 13, 2019 in Angular
Sep 13, 2019 in Angular
...