Angular Radio Button with Reactive Form Tutorial

Angular Radio Button with Reactive Form Tutorial

In this post we will give you information about Angular Radio Button with Reactive Form Tutorial. Hear we will give you detail about Angular Radio Button with Reactive Form TutorialAnd how to use it also give you demo for it if it is necessary.

If you need to see example of angular radio button group reactive form. In this article, we will implement a how to use radio button in angular. you will learn angular radio button example. let’s discuss about angular radio button change event.

You can easily use radio button with angular 6, angular 7, angular 8 and angular 9.

Here, i will give you two example to get value of selected radio button by click on submit button and another get checked radio button value in on change value. so we will take “gender” variable and create two radio button. let’s see both example one by one.

You need to follow bellow step to add form validation in angular 9.

Example 1: Get Checked Radio Button on Form Submit

Step 1: 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 { AppComponent } from './app.component';

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

@NgModule({

declarations: [

AppComponent

],

imports: [

BrowserModule,

FormsModule,

ReactiveFormsModule

],

providers: [],

bootstrap: [AppComponent]

})

export class AppModule { }

Step 2: 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 9.

src/app/app.component.html

<div >

<h1>Angular Radio Button Example - ItSolutionStuff.com</h1>

<form [formGroup]="form" (ngSubmit)="submit()">

<div >

<label for="gender">Gender:</label>

<div>

<input id="male" type="radio" value="male" name="gender" formControlName="gender">

<label for="male">Male</label>

</div>

<div>

<input id="female" type="radio" value="female" name="gender" formControlName="gender">

<label for="female">Female</label>

</div>

<div *ngIf="f.gender.touched && f.gender.invalid" >

<div *ngIf="f.gender.errors.required">Name is required.</div>

</div>

</div>

<button type="submit" [disabled]="!form.valid">Submit</button>

</form>

</div>

Also see:Angular NgClass – How to Add Dynamic Class in Angular 9/8?

Step 3: 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';

import { FormGroup, FormControl, Validators} from '@angular/forms';

@Component({

selector: 'app-root',

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

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

})

export class AppComponent {

form = new FormGroup({

gender: new FormControl('', Validators.required)

});

get f(){

return this.form.controls;

}

submit(){

console.log(this.form.value);

}

}

Now you can run your application using following command:

ng serve

Example 2: Get Checked Radio Button on Change Event

Step 1: 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 { AppComponent } from './app.component';

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

@NgModule({

declarations: [

AppComponent

],

imports: [

BrowserModule,

FormsModule,

ReactiveFormsModule

],

providers: [],

bootstrap: [AppComponent]

})

export class AppModule { }

Step 2: 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 9.

src/app/app.component.html

<div >

<h1>Angular Radio Button Example - ItSolutionStuff.com</h1>

<form [formGroup]="form" (ngSubmit)="submit()">

<div >

<label for="gender">Gender:</label>

<div>

<input id="male" type="radio" value="male" name="gender" formControlName="gender" (change)="changeGender($event)">

<label for="male">Male</label>

</div>

<div>

<input id="female" type="radio" value="female" name="gender" formControlName="gender" (change)="changeGender($event)">

<label for="female">Female</label>

</div>

<div *ngIf="f.gender.touched && f.gender.invalid" >

<div *ngIf="f.gender.errors.required">Name is required.</div>

</div>

</div>

<button type="submit" [disabled]="!form.valid">Submit</button>

</form>

</div>

Also see:Angular NgClass – How to Add Dynamic Class in Angular 9/8?

Step 3: 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';

import { FormGroup, FormControl, Validators} from '@angular/forms';

@Component({

selector: 'app-root',

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

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

})

export class AppComponent {

form = new FormGroup({

gender: new FormControl('', Validators.required)

});

get f(){

return this.form.controls;

}

submit(){

console.log(this.form.value);

}

changeGender(e) {

console.log(e.target.value);

}

}

Now you can run your application using following command:

Also see:Angular Select Dropdown with Reactive Form

ng serve

I hope it can help you…

Hope this code and post will helped you for implement Angular Radio Button with Reactive Form Tutorial. 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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