Angular 9/8 FormArray Example | FormArray in Angular

Angular 9/8 FormArray Example | FormArray in Angular

In this post we will give you information about Angular 9/8 FormArray Example | FormArray in Angular. Hear we will give you detail about Angular 9/8 FormArray Example | FormArray in AngularAnd how to use it also give you demo for it if it is necessary.

Hello Dev,

Are you looking for example of angular formarray example. let’s discuss about angular 9 formarray example. we will help you to give example of formarray in angular example. you can understand a concept of form array in angular example.

I will show you very simple and step by step example of how to use formarray in angular 6, anuglar 7, angular 8 and angular 9 application.

Using FormArray you can create building blocks of forms with FormControl in Angular. FormArray will key values of each child FormControl into an array. You can easily create dynamic add more input fields example using FormArray in Angular.

FormArray Constructor:

constructor(controls: AbstractControl[], validatorOrOpts?: ValidatorFn |

AbstractControlOptions | ValidatorFn[], asyncValidator?: AsyncValidatorFn |

AsyncValidatorFn[])

In this example we will create form with product name and user can add multiple quantity with price. we will use formgroup and formarray to create dynamic form in angular application.

You can see bellow layout for demo. let’s follow bellow step.

Import FormsModule:

src/app/app.module.ts

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

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

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

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

@NgModule({

imports: [ BrowserModule, FormsModule, ReactiveFormsModule ],

declarations: [ AppComponent ],

bootstrap: [ AppComponent ]

})

export class AppModule { }

updated Ts File

In this file we will first import FormGroup, FormControl,FormArray and FormBuilder from angular forms library.

src/app/app.component.ts

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

import { FormGroup, FormControl, FormArray, FormBuilder } from '@angular/forms'

@Component({

selector: 'my-app',

templateUrl: './app.component.html',

styleUrls: [ './app.component.css' ]

})

export class AppComponent {

name = 'Angular';

productForm: FormGroup;

constructor(private fb:FormBuilder) {

this.productForm = this.fb.group({

name: '',

quantities: this.fb.array([]) ,

});

}

quantities() : FormArray {

return this.productForm.get("quantities") as FormArray

}

newQuantity(): FormGroup {

return this.fb.group({

qty: '',

price: '',

})

}

addQuantity() {

this.quantities().push(this.newQuantity());

}

removeQuantity(i:number) {

this.quantities().removeAt(i);

}

onSubmit() {

console.log(this.productForm.value);

}

}

Template Code:

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 9.

src/app/app.component.html

<div >

<h1>Angular FormArray Example - ItSolutionStuff.com</h1>

<form [formGroup]="productForm" (ngSubmit)="onSubmit()">

<p>

<label for="name">Product Name:</label>

<input type="text" id="name" name="name" formControlName="name" >

</p>

<table formArrayName="quantities">

<tr>

<th colspan="2">Add Multiple Quantity:</th>

<th width="150px"><button type="button" (click)="addQuantity()" >Add More</button></th>

</tr>

<tr *ngFor="let quantity of quantities().controls; let i=index" [formGroupName]="i">

<td>

Quantity :

<input type="text" formControlName="qty" >

</td>

<td>

Price:

<input type="text" formControlName="price" >

</td>

<td>

<button (click)="removeQuantity(i)" >Remove</button>

</td>

</tr>

</table>

<button type="submit" >Submit</button>

</form>

<br/>

{{this.productForm.value | json}}

</div>

Now you can run your application using following command:

ng serve

I hope it can help you…

Hope this code and post will helped you for implement Angular 9/8 FormArray Example | FormArray in Angular. if you need any help or any feedback give it in comment section or you have good idea about this post you can give it comment section. Your comment will help us for help you more and improve us. we will give you this type of more interesting post in featured also so, For more interesting post and code Keep reading our blogs

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