Forms

Question 1

What are the common foundation classes of template-driven and reactive design?

Answer 1

FormControl…
tracks the value and validation status of an individual form control.

FormGroup…
tracks the same values and status for a collection of form controls.

FormArray…
tracks the same values and status for an array of form controls.

ControlValueAccessor…
creates a bridge between Angular FormControl instances and native DOM elements.

Question 2

What design patterns exist for forms?

Answer 2

Reactive Forms

Template-driven Forms