How to append new FormGroup or FormControl to form

To add upon what @ranakrunal9 said.

If you would like to use validators with addControl do the following:

this.myForm.addControl('newControl', new FormControl('', Validators.required));

Just don't forget to add the following import

import {FormControl} from "@angular/forms";

Reference to addControl: https://angular.io/api/forms/FormGroup#addControl

Reference to FormControl: https://angular.io/api/forms/FormControl

You can use addControl method of FormGroup class as per documentation

So you can do as below :

this.myForm.addControl('newcontrol',[]);

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