Template-Driven Forms and Reactive Forms

 Template-Driven Forms and Reactive Forms 

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🧾 WHAT is a Template-Driven Form?

A Template-Driven Form is a type of Angular form where most of the logic (like form control creation, validation, and data binding) is written directly in the HTML template using Angular directives such as:

• [(ngModel)]

• #form="ngForm"

• required, minlength, etc.

✅ Angular automatically creates the FormControl instances behind the scenes based on the template structure.

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🎯 WHY use Template-Driven Forms?

Benefit	Description
✅ Simple & Quick	Ideal for small or basic forms
✅ Less Boilerplate	No need to define form controls in TypeScript
✅ Easy to Understand	Great for beginners learning Angular forms
✅ Two-Way Data Binding	Uses [(ngModel)] to sync input with component model

🟢 Best suited for: login forms, contact forms, and small apps

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🧾 WHAT is a Reactive Form?

A Reactive Form is a type of Angular form where the entire form structure (fields, validation rules, etc.) is defined programmatically in the component class using:

• FormGroup

• FormControl

• FormBuilder

• Validators

You bind the form to your HTML using [formGroup] and formControlName.

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🎯 WHY use Reactive Forms?

Benefit	Description
✅ Scalable & Flexible	Ideal for complex, dynamic, or large forms
✅ Better Control	You control every aspect of form state and behavior
✅ Explicit Validation	Easily add synchronous & asynchronous validators
✅ Testability	Easier to write unit tests for form logic
✅ Dynamic Forms	Add/remove fields at runtime with FormArray and conditions

🟢 Best suited for: registration forms, admin panels, dynamic surveys, etc.

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✅ Summary

	Template-Driven Form	Reactive Form
WHAT	HTML-driven form using Angular directives (ngModel)	TS-driven form using FormGroup, FormControl
WHY	Simpler, less code, ideal for basic forms	Better structure, testability, ideal for complex forms