Angular 14 Checkbox Checked Event Example

To get checked checkbox values in angular 14 apps. In this tutorial, we will learn how to get checked checkbox values in the angular 14 apps.

Angular 14 Checkbox Checked Event Example

Use the following steps to get checked checkbox values in angular apps:

• Step 1 – Create New Angular App
• Step 2 – Add Code on Module.ts File
• Step 3 – Add Code on View File
• Step 4 – Add Code On Component ts File
• Step 5 – Start Angular App

Step 1 – Create New Angular App

First of all, open your terminal and execute the following command on it to install angular app:

ng new my-new-app

Step 2 – Add Code on Module.ts File

In this step, visit src/app directory and open app.module.ts file. Then add the following code into it:

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 3 – Add Code on View File

In this step, create simple reactive form for get selected checkbox values. So, visit src/app/app.component.html and update the following code into it:

<div class="container">
    <h1>Angular CheckBox Example - Tutsmake.com</h1>

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

        <div class="form-group">
            <label for="website">Website:</label>
            <div *ngFor="let web of websiteList">
              <label>
                <input type="checkbox" [value]="web.id" (change)="onCheckboxChange($event)" />
                {{web.name}}
              </label>
            </div>
        </div>

        <button class="btn btn-primary" type="submit" [disabled]="!form.valid">Submit</button>
    </form>
</div>

Step 4 – Add Code On Component ts File

In this step, visit the src/app directory and open app.component.ts. Then add the following code into component.ts file:

import { Component } from '@angular/core';
import { FormBuilder, FormGroup, FormControl, Validators, FormArray} from '@angular/forms';

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {

  form: FormGroup;
  websiteList: any = [
    { id: 1, name: 'Google.com' },
    { id: 2, name: 'Angular.com' },
    { id: 3, name: 'Tutsmake.com' }
  ];

  constructor(private formBuilder: FormBuilder) {
    this.form = this.formBuilder.group({
      website: this.formBuilder.array([], [Validators.required])
    })
  }

  onCheckboxChange(e) {
    const website: FormArray = this.form.get('website') as FormArray;

    if (e.target.checked) {
      website.push(new FormControl(e.target.value));
    } else {
       const index = website.controls.findIndex(x => x.value === e.target.value);
       website.removeAt(index);
    }
  }

  submit(){
    console.log(this.form.value);
  }

}

Step 5 – Start Angular App

In this step, execute the following commands on terminal to start angular app:

ng serve

php -S localhost:8001

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