Adding Form Fields Dynamically in Angular 9
In this post we will give you information about Adding Form Fields Dynamically in Angular 9. Hear we will give you detail about Adding Form Fields Dynamically in Angular 9And how to use it also give you demo for it if it is necessary.
Hello Dev,
In this example, i will show you add/remove input fields dynamically with angular 9. i would like to share with you how to dynamically add and remove form fields in angular 9. This article goes in detailed on angular 9 dynamic form fields. This tutorial will give you simple example of dynamically add and remove form input fields with angular 9.
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 9 application.
You can see bellow layout for demo. let’s follow bellow step.
Preview:
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 Adding Form Fields Dynamically in Angular 9. 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