Can an empty form group be defined and then have form controls added later within the onInit function?

Can someone help me with declaring an empty form group and then adding form controls afterwards? I have tried passing in a null value or not passing anything at all, but it doesn't seem to work.

this.demoForm = new FormGroup(null);//NOT WORKING

Is there any workaround for this issue? Thank you in advance.

Answer №1

To start, initialize a new FormGroup with no controls:

const myFormGroup = new FormGroup({});

Next, you can add a new form control, form group, or form array (specifically an AbstractControl, the parent class of these three types):

const myFormControl = new FormControl();
myFormGroup.addControl('fieldName', myFormControl);

To learn more about adding controls, refer to the official documentation on the addControl method: https://angular.io/api/forms/FormGroup#addcontrol

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