---
name: angular-forms-52ebab99dd96
description: >
  Angular forms: Signal Forms (experimental) and Reactive Forms.
  Trigger: When working with forms, validation, or form state in Angular.
metadata:
  author: gentleman-programming
  version: "1.0"
---

## When to Use What

| Use Case | Recommendation |
|----------|----------------|
| New apps with signals | Signal Forms (experimental) |
| Production apps | Reactive Forms |
| Simple forms | Template-driven |

---

## Signal Forms (v21+, experimental)

```typescript
import { form, FormField, required, email } from '@angular/forms/signals';

@Component({
  imports: [FormField],
  template: `
    <!-- inline for docs brevity; use templateUrl in production -->
    <form>
      <input [formField]="emailField" type="email" />
      <input [formField]="passwordField" type="password" />
      <button (click)="submit()">Login</button>
    </form>
  `
})
export class LoginComponent {
  readonly loginForm = form({
    email: ['', [required, email]],
    password: ['', required]
  });
  
  readonly emailField = this.loginForm.controls.email;
  readonly passwordField = this.loginForm.controls.password;
  
  submit() {
    if (this.loginForm.valid()) {
      const values = this.loginForm.value();
    }
  }
}
```

### Signal Forms Benefits
- Automatic two-way binding
- Type-safe field access
- Schema-based validation
- Built on signals

---

## Reactive Forms (production)

```typescript
import { FormBuilder, Validators, ReactiveFormsModule } from '@angular/forms';

@Component({
  imports: [ReactiveFormsModule],
  template: `
    <!-- inline for docs brevity; use templateUrl in production -->
    <form [formGroup]="form" (ngSubmit)="submit()">
      <input formControlName="email" type="email" />
      <input formControlName="password" type="password" />
      <button type="submit" [disabled]="form.invalid">Login</button>
    </form>
  `
})
export class LoginComponent {
  private readonly fb = inject(FormBuilder);

  form = this.fb.nonNullable.group({
    email: ['', [Validators.required, Validators.email]],
    password: ['', [Validators.required, Validators.minLength(8)]],
  });
  
  submit() {
    if (this.form.valid) {
      const { email, password } = this.form.getRawValue();
    }
  }
}
```

### Key Points
- ALWAYS use `fb.nonNullable.group()` for type safety
- Use `getRawValue()` to get typed values
- Reactive Forms are synchronous (easier to test)

---

## Nested Forms & FormArray

```typescript
form = this.fb.nonNullable.group({
  name: [''],
  address: this.fb.group({
    street: [''],
    city: [''],
  }),
  phones: this.fb.array([this.fb.control('')]),
});

get phones() {
  return this.form.get('phones') as FormArray;
}

addPhone() {
  this.phones.push(this.fb.control(''));
}
```

---

## Resources

- https://angular.dev/guide/forms/signals/overview
- https://angular.dev/guide/forms/reactive-forms


---
Source attribution: CamiloAndresGTRUniandes
Original project: https://github.com/CamiloAndresGTRUniandes/lucy-ai/blob/52e3d6d9faf7773a4a764475b8f5a92a72e39749/skills/angular-forms/SKILL.md
License: MIT
License information: https://opensource.org/license/mit
Original upstream instructions; downloaded from Dave AI.

## Upstream license notice

MIT License

Copyright (c) 2026 Camilo Andres / lucy-ai

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.



# Dave AI resource metadata

Creator / publisher: CamiloAndresGTRUniandes
Original project: https://github.com/CamiloAndresGTRUniandes/lucy-ai/blob/52e3d6d9faf7773a4a764475b8f5a92a72e39749/skills/angular-forms/SKILL.md
Attribution basis: Source repository record

Fields of work: Development & Engineering
Roles: Frontend Developer, Full-Stack Developer
Specialties: Cross Platform, Frontend
Tools: @Angular/Forms
Country applicability: Country not specified
Classification basis: Source catalog labels
Instruction SHA-256: 8e52f0f01df32de3d82cdf71717ad584860c42597974a625a9e90e0b5c3128d4