Angular 8 - Adding calculated value into formGroup by using formControlName

Question

I want to add Data period column calculated values into formGroup using formContolName="interval".

<td formContolName="interval" class="form-control">{{onlyyears(this.dynamicForm.value.tickets[i].startday,this.dynamicForm.value.tickets[i].endday)}}</td> 

How to fetch calculated value into formControlName="interval"? Code in below link, https://stackblitz.com/edit/angular-326sky?file=src%2Fapp%2Fapp.component.html

Answer 1

Somehow I managed to fix this issue by the below code, <td><input readonly [ngModel]="onlyyears(this.dynamicForm.value.tickets[i].startday,this.dynamicForm.value.tickets[i].endday)" formControlName="interval" /></td>