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Getting started with Angular RadioButton component

21 Sep 2021 / 3 minutes to read

This section explains how to create a simple RadioButton, and demonstrate the basic usage of the RadioButton module in an Angular environment.

Dependencies

The following list of dependencies are required to use the RadioButton module in your application.

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|-- @syncfusion/ej2-angular-buttons
   |-- @syncfusion/ej2-angular-base
   |-- @syncfusion/ej2-base
   |-- @syncfusion/ej2-buttons

Setup Angular environment

You can use Angular CLI to setup your Angular applications. To install Angular CLI use the following command.

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npm install -g @angular/cli

Create an Angular application

Start a new Angular application using below Angular CLI command.

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ng new my-app
cd my-app

Installing Syncfusion RadioButton package

To install RadioButton package, use the following command.

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npm install @syncfusion/ej2-angular-buttons --save

Adding RadioButton module

Import RadioButton module into Angular application(app.module.ts) from the package @syncfusion/ej2-angular-buttons.

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

// Imported Syncfusion radiobutton module from buttons package.
import { RadioButtonModule } from '@syncfusion/ej2-angular-buttons';

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

@NgModule({
  imports:      [ BrowserModule, RadioButtonModule ], // Registering EJ2 RadioButton Module.
  declarations: [ AppComponent ],
  bootstrap:    [ AppComponent ]
})
export class AppModule { }

Adding Syncfusion RadioButton component

Modify the template in app.component.ts file to render the RadioButton component.

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

@Component({
  selector: 'app-root',
  template: `<!-- To Render RadioButton. -->
             <ejs-radiobutton label="Default"></ejs-radiobutton>`
})
export class AppComponent  { }

Adding CSS reference

Add RadioButton component’s styles as given below in style.css.

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@import "../node_modules/@syncfusion/ej2-base/styles/material.css";
@import "../node_modules/@syncfusion/ej2-buttons/styles/material.css";

Running the application

Run the application in the browser using the following command:

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ng serve

The below example shows a basic RadioButton component,

Source
Preview
app.component.ts
app.module.ts
main.ts
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import { Component } from '@angular/core';

@Component({
    selector: 'app-root',
    template: `<ul>
               <!-- To Render RadioButton. -->
               <li><ejs-radiobutton label="Option 1" name="default"></ejs-radiobutton></li>

               <li><ejs-radiobutton label="Option 2" name="default" checked="true"></ejs-radiobutton></li>
               </ul>`
})

export class AppComponent { }
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RadioButtonModule } from '@syncfusion/ej2-angular-buttons';
import { AppComponent } from './app.component';
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        RadioButtonModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
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import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);

Change the RadioButton state

The Essential JS 2 RadioButton contains 2 different states visually, they are as follows:

  • Checked
  • Unchecked

The RadioButton checked property is used to handle the checked and unchecked state. In the checked state an inner circle will be added to the visualization of RadioButton.

Source
Preview
app.component.ts
app.module.ts
main.ts
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import { Component } from '@angular/core';

@Component({
selector: 'app-root',
template: `<ul>
           <!-- checked state. -->
           <li><ejs-radiobutton label="Option 1" name="state" checked="true"></ejs-radiobutton></li>

           <!-- unchecked state. -->
           <li><ejs-radiobutton label="Option 2" name="state"></ejs-radiobutton></li>
           </ul>`
})

export class AppComponent { }
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import { NgModule } from '@angular/core';
import { BrowserModule } from '@angular/platform-browser';
import { RadioButtonModule } from '@syncfusion/ej2-angular-buttons';
import { AppComponent } from './app.component';
import { enableRipple } from '@syncfusion/ej2-base';

enableRipple(true);

/**
 * Module
 */
@NgModule({
    imports: [
        BrowserModule,
        RadioButtonModule
    ],
    declarations: [AppComponent],
    bootstrap: [AppComponent]
})
export class AppModule { }
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import { platformBrowserDynamic } from '@angular/platform-browser-dynamic';
import { enableProdMode } from '@angular/core';
import { AppModule } from './app.module';

enableProdMode();
platformBrowserDynamic().bootstrapModule(AppModule);