Angular FormGroup Nested FormGroup AddControl code example

Example 1: formgroup addcontrol

let form: FormGroup = new FormGroup({});
form.addControl(field_name, new FormControl('', Validators.required));

Example 2: reactive form nested form group

// Reactive Forms Nested formControls
yourFormName: FormGroup = new FormGroup({
  pet: new FormGroup({
    name: new FormControl('', [Validators.required]),
    age: new FormControl('', [Validators.required]),
  }),
  ...
});