How to append new FormGroup or FormControl to form

Question

I have the following form in Angular created with FormBuilder:

constructor(private fb: FormBuilder) {
    this.myForm = fb.group({
             


        

Answer 1

I had the same issue, but since I already have a empty FormGroup {} inside the main FormGroup I was able to append FormControls like this:

(this.myForm.get("form_group_name") as FormGroup).addControl("item1", new FormControl("default val"));