Import to learn Forms is to understand the following concept
- FormGroups
- FormControls
Angular Form Model
FormsModule
It is default forms module, if create a new form without specify the formGroup, will assign this to the form. ngModel is to create a formControl to the form.
ReactiveFormsModule
Using FormBuilder to build the forms by ourselves.
Validators
Explicitly validators is coming from Validator
Custom validators by return
{ [s: string]: boolean }
Following is brainstorm
