Angular PrimeNG Form RadioButton Dynamic Values, Preselection, Value Binding and Disabled Option

Angular PrimeNG is an open-source framework with a rich set of native Angular UI components that are used for great styling and this framework is used to make responsive websites with very much ease. In this article, we will know how to use the Form RadioButton Dynamic Values, Preselection, Value Binding, and Disabled Option in Angular PrimeNG.

The RadioButton Component allows the user to select one option at a time from a set.

Syntax:

<div *ngFor="..." class="p-field-checkbox">
  <p-radioButton 
      [inputId]="..."
      [value]="..." 
      [(ngModel)]="..."
      [disabled]="...">
  </p-radioButton>
  <label [for]="...">{{....}}</label>
</div>

Creating Angular Application & module installation:

Step 1: Create an Angular application using the following command.

ng new appname

Step 2: After creating your project folder i.e. appname, move to it using the following command.

cd appname

Step 3: Install PrimeNG in your given directory.

npm install primeng --save
npm install primeicons --save

Project Structure: It will look like the following.

Steps to run the above file: Run the below command to see the output

ng serve --save

Example 1: This basic example illustrates the use of the Angular PrimeNG Form RadioButton Dynamic Values, Preselection, Value Binding, and Disabled Option.

app.component.html:

HTML

<h1 style="color: green">GeeksforGeeks</h1>
<h5>
    Dynamic Values, Preselection,
    Value Binding and Disabled Option
</h5>

<div *ngFor="let a of gfg" class="p-field-checkbox">
   <p-radioButton
       [inputId]="a.key"
       [value]="a"
       [(ngModel)]="selected"
       [disabled]="a.key === 'D'">
   </p-radioButton>
   <label [for]="a.key">{{a.name}}</label>
</div>

app.component.ts:

Javascript

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

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
})

export class AppComponent {
    selected: any = null;

    gfg: any[] = [
       { name: 'Angular', key: 'A' },
       { name: 'React', key: 'B' },
       { name: 'JavaScript', key: 'C' },
       { name: 'MongoDB', key: 'D' },
       { name: 'Node JS', key: 'E' },
    ];

    ngOnInit() {
       this.selected = this.gfg[2];
    }
}

app.module.ts:

Javascript

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import {FormsModule} from '@angular/forms';
import { BrowserAnimationsModule }
    from '@angular/platform-browser/animations';
import { AppComponent }   from './app.component';
import {RadioButtonModule} from 'primeng/radiobutton';

@NgModule({
    imports: [
        BrowserModule,
        BrowserAnimationsModule,
        RadioButtonModule,
        FormsModule
    ],
    declarations: [ AppComponent ],
    bootstrap:    [ AppComponent ]
})

export class AppModule { }

Output:

Angular PrimeNG Form RadioButton Dynamic Values, Preselection, Value Binding and Disabled Option

Example 2: This is another basic example that illustrates the use of the Angular PrimeNG Form RadioButton Dynamic Values, Preselection, Value Binding, and Disabled Option Component using some different values.

app.component.html:

HTML

<h1 style="color: green">GeeksforGeeks</h1>
<h5>
    Dynamic Values, Preselection,
    Value Binding and Disabled Option
</h5>

<div *ngFor="let b of gfg" class="p-field-checkbox">
   <p-radioButton
       [inputId]="b.courseId"
       [value]="b"
       [(ngModel)]="selected"
       [disabled]="b.courseId === '3'">
   </p-radioButton>
   <label [for]="b.courseId">{{b.course}}</label>
</div>

app.component.ts:

Javascript

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

@Component({
    selector: 'app-root',
    templateUrl: './app.component.html',
})

export class AppComponent {
    selected: any = null;

    gfg: any[] = [
       { course: 'DSA Self-Paced', courseId: '1' },
       { course: 'System Design', courseId: '2' },
       { course: 'C++ STL', courseId: '3' },
       { course: 'Full Stack Development', courseId: '4' },
       { course: 'DBMS', courseId: '5' },
    ];

    ngOnInit() {
       this.selected = this.gfg[3];
    }
}

app.module.ts:

Javascript

import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import {FormsModule} from '@angular/forms';
import { BrowserAnimationsModule }
    from '@angular/platform-browser/animations';
import { AppComponent }   from './app.component';
import {RadioButtonModule} from 'primeng/radiobutton';

@NgModule({
    imports: [
        BrowserModule,
        BrowserAnimationsModule,
        RadioButtonModule,
        FormsModule
    ],
    declarations: [ AppComponent ],
    bootstrap:    [ AppComponent ]
})

export class AppModule { }

Output:

Angular PrimeNG Form RadioButton Dynamic Values, Preselection, Value Binding and Disabled Option

Reference: https://primefaces.org/primeng/radiobutton