Back to course

Introduction to Forms in Angular

The Complete Angular Developer: From Zero to Hero

41. Introduction to Forms in Angular

Handling user input via forms is a cornerstone of modern web development. Angular provides two distinct approaches for building and validating forms:

  1. Template-Driven Forms (TDF): Form logic is primarily managed in the template using directives (ngModel, ngForm). Simpler for basic forms.
  2. Reactive Forms (RF): Form logic is managed programmatically in the component class using explicit form control objects (FormControl, FormGroup). Ideal for complex, dynamic, or highly tested forms.

Shared Form Responsibilities

Regardless of the approach, Angular forms handle three main tasks:

  • Data Model: Tracking the data value of the form and its inputs.
  • Change Tracking: Monitoring the form's state (e.g., pristine, dirty, touched).
  • Validation: Checking user input against required rules (e.g., required, email, custom rules).

Form Setup

Forms reside in a separate module. You must import the appropriate module into your feature module or AppModule.

  • To use Template-Driven Forms, import FormsModule.
  • To use Reactive Forms, import ReactiveFormsModule.

typescript // app.module.ts import { FormsModule } from '@angular/forms'; // For Template-Driven import { ReactiveFormsModule } from '@angular/forms'; // For Reactive

@NgModule({ imports: [BrowserModule, FormsModule, ReactiveFormsModule], // ... }) export class AppModule { }

We will now dedicate separate lessons to mastering both Template-Driven and Reactive approaches.