Angular & Signals (283 Qs)•Part 10: Reactive Forms, Standalone Components, Signals & NgRx (256 - 283)
What are the differences between reactive forms and template driven forms?
Below are the main differences between reactive forms and template driven forms
| Feature | Reactive | Template-Driven |
|---|---|---|
| Form model setup | Created(FormControl instance) in component explicitly | Created by directives |
| Data updates | Synchronous | Asynchronous |
| Form custom validation | Defined as Functions | Defined as Directives |
| Testing | No interaction with change detection cycle | Need knowledge of the change detection process |
| Mutability | Immutable(by always returning new value for FormControl instance) | Mutable(Property always modified to new value) |
| Scalability | More scalable using low-level APIs | Less scalable using due to abstraction on APIs |
Practical Code Example
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// Reactive Forms vs Template-Driven Forms:
// Reactive: Synchronous, immutable state, direct programmatic validation, highly testable
// Template-Driven: Asynchronous, two-way [(ngModel)], template-directed validation