Angular Template-Driven vs Reactive Forms

Forms are an essential part of any Angular application. Angular provides two types of forms.

1. Template-Driven Forms
2. Reactive Forms

In this article, we will understand both forms with examples, and will see a comparison table.

What are Template-Driven Forms?

Template-driven forms are very simple forms that are used in the HTML template file.

Key Highlights

1. It uses Angular directives like ngModel
2. we implement mostly Logic in the HTML template file.
3. It creates form controls automatically.
4. It is mainly used for simple and small forms.

Example – Template-Driven Form

<form #myForm="ngForm">
  <input type="text" name="username" ngModel required>
  <button type="submit">Submit</button>
</form>

Advantages of Template Driven Forms

1. It is very Easy to learn
2. It has less TypeScript code.
3. You can build small forms quickly.

Disadvantages of Template Driven Forms

1. It is not suitable for complex forms.
2. It is very typecial to write unit tests cases.
3. It has very less control over validations.

What are Reactive Forms?

Reactive forms are created using FormGroup, FormControl, and FormBuilder. This is best for large-scale applications.

Key Highlights

1. Form model is created in TypeScript
2. It is used to create Highly scalable and flexible forms.
3. It is good for Dynamic forms and strong validations.

Example – Reactive Form

in ts file

form = new FormGroup({
  username: new FormControl('')
});

in html file:

<form [formGroup]="form">
  <input type="text" formControlName="username">
  <button type="submit">Submit</button>
</form>

Advantages of Reactive Forms

1. It is more control & flexibility.
2. It is better for complex validations.
3. Easy to write unit test cases.
4. It is more predictable and scalable.

Disadvantages of Reactive Forms

1. You have to write more code to create a form.
2. You need requires more Angular knowledge

Comparison Table

Which Form should You Use?

When willl you Template-Driven Forms?

1. If your form is small.
2. If you want quick implementation.
3. If you prefer writing logic in HTML file.

When will you use Reactive Forms?

1. If your form is large or dynamic.
2. If you want advanced validation.
3. If you want clean and testable code.
4. if your project has enterprise-level.