Angular Formarray Example

This project was generated with Angular CLI version 9.0.0.

Development server

Run ng serve for a dev server. Navigate to http://localhost:4200/. The app will automatically reload if you change any of the source files.

How to implement form array in angular

Steps:

• Create angular project with below command. "ng new angular-formarray-example-2"

• After successfully creation of angular app, change file directory to project-name. "cd angular-formarray-example-2"

• Open project in vs code using "code ."

• Then run the project using "ng serve".

• Open project in chrome using localhost:4200

• Open app component in vs code and remove the content which is created by angular cli while creating the app.

• Add ReactiveFormsModule, FormsModule in app.module.ts

• Open app.component.ts , then add formbuilder as dependency in constuctor.

• Create form variable above the constructor.

• Create formInit method to intialize the form and call the method form either contructor or ngOninit.

• And create form group using form builder and also added skills as formArray inside form group.

• Create get method for getall the skills and return type must be formarray.

• Add some dummy data in the form array by directly using formgroup or skills.push method.

• Displaying form array in app.component.html to follow below options.

  <form class="form" [formGroup]="form">
  </form>

  <form class="form" [formGroup]="form">
   <div class="container">
      <div formArrayName="skills"></div>
   </div>
</form>

<form class="form" [formGroup]="form">
   <div class="container">
      <div formArrayName="skills">
         <div *ngFor="let skill of skills.controls;let i=index" >
            <div [formGroupName]="i"><input type="checkbox" formControlName="checked" /> {{skill.get('name').value}}</div>
         </div>
      </div>
   </div>
</form>

OUTPUT