Angular Template Driven vs Reactive Form
Here, we will see the difference between Template Driven Form and Reactive Form when it comes in use. Here we'll see how they are differ to each other.
There are two different approaches to handling user input through forms in Angular.
- Template Driven Form
- Reactive Form
1. Template Driven Form
In this method, HTML tag is used to create forms such as login forms, contact forms. Angular automatically interprets and creates a form object representation for the HTML tag. Template driven forms use two way data binding to update the data model in the component as changes are made in the template and vice versa. In template-driven forms, The directive NgModel is used to create and manage a FormControl instance for a given form HTML element.
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2. Angular Reactive Form
The below points defines the Angular Reactive Form.
- Angular Reactive Forms are also called Model Driven Form that means we write the code inside the component class and also map the objects to the form controls on the view.
- The Reactive approach removes validation logic from the template, keeping the templates cleaner.It use an immutable approach to manage the state of a form.
- Each time a change occurs to the form, the FormControl instance will not update the existing data model, it will return a new state (a new data model).
- Reactive forms are synchronous when form inputs and values are provided as streams of input values, which can be accessed in a synchronous way.
- Reactive forms are synchronous makes scaling easier. It is reusable and helps a lot with large-scale forms.
- It provides synchronous access to the form and data models, and it can be tested without rendering the UI. So testing is easy.
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Template Driven vs Reactive Forms
| SNo. | Template Driven Form | Reactive Form |
| 1 | It is easy to use | It is more flexible, but needs a lot of practice |
| 2 | Most of the forms logic is written in a component Template file. | Most of the form logic is written in a component class file or typescript code(.ts). |
| 3 | Template Driven Forms make use of the FormsModule. | Reactive forms are based on ReactiveFormsModule. |
| 4 | Template Driven Forms use unstructured data model. | Reactive Form use structured data model. |
| 5 | Template Driven Forms are mostly Asynchronous in nature. | Reactive forms are mostly synchronous in nature. |
| 6 | Template Driven Forms use directives for form validation. | Reactive Forms use functions for form validation. |
| 7 | Template Driven Forms perform as an mutable data structure. | Reactive Forms perform as an immutable data structure. |
| 8 | Template Driven Forms Unit testing is another challenge. | Easier unit testing |
When you think which one is better to use Neither Template Driven nor Reactive are better over each other. Both forms have different approaches, So you can use whichever suits your application the most. You can even use both in the same application.
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