Lab 01: Reactive Forms

📖 Resources

• Reactive Forms Documentation
• Angular Material Forms
• Album Model Reference
• Form Validation

🚀 Starter Code

step-1-album-wholesale-v16-pre-add-album

In this lab, you'll create a reactive form for adding albums using FormGroup and FormControl. You'll bind the form to a template with Angular Material components and display validation errors.

📝 Instructions

Step 1: Create FormGroup

Create a FormGroup with FormControls:

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

albumForm = new FormGroup({
  name: new FormControl('', Validators.required),
  artist: new FormControl('', Validators.required),
  price: new FormControl(0, [Validators.required, Validators.min(0)])
});

Step 2: Bind Form to Template

Use [formGroup] and formControlName:

<form [formGroup]="albumForm" (ngSubmit)="saveAlbum()">
  <input matInput formControlName="name">
  <input matInput formControlName="artist">
  <input matInput formControlName="price" type="number">

  <button type="submit" [disabled]="!albumForm.valid">
    Add Album
  </button>
</form>

Step 3: Display Validation Errors

Show errors conditionally:

<mat-error *ngIf="albumForm.get('name')?.hasError('required')">
  Name is required
</mat-error>