Скачать или смотреть Angular #69 - Reactive From | Form Builder (How to use Form Builder in Reactive Form to Build Forms)

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Reactive Form in Angular - Form Builderl

Form Builder is the simplest way to build form in angular. The FormBuilder provides syntactic sugar that shortens creating instances of a FormControl, FormGroup, or FormArray. It reduces the amount of boilerplate needed to build complex forms.
First we have to inject form builder in the constructor, so that we can use in our component then create form group in the form builder and store in the customForm.