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Reactive forms use the form control objects to manipulate the forms.

So you can create form tree using form control objects into the component and bind form controls to the component template using form Control Name.

Adobe provided a lot of infrastructure to do that with just a simple script.

Let’s take a look at how to do that with a text field that is only supposed to have a value of either ‘AAAA’ or ‘BBBB’ (yes, I know that this does not make much sense in a real PDF form).

Here you can see we have used different classes like Form Group, Form Control, and Form Array. First Form Group is used to declare the Form and next Form Control is used to declare all form controls inside the Form Group.

Form Array is used to maintain the group of form controls.

The component can observe the changes in form control state and react to those changes.

And never forgot to import Browser Module for bootstraping the application.

Validating data in Microsoft Access allows you to check data whilst it is being entered by the database user and will enable you to not save the data if it breaks any validation rules or routines.

It is easy for an end user to make a mistake when they are entering data or even to leave out important details that must be entered, so we need to check this data when it is being entered into the database.

Directive validation is very easy , we just need to add particular validation directive to HTML form element like we do in template driven forms.

The above example is implemented the Reactive Forms validation using directive now we going to learn how to define validation from the component.

Now let us begin with HTML Form element which we used in our previous article.

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