hoc-form | Concise form validation for React! 🚀 | Form library

I am new to Angular js, so my requirement is when I add an item for the first item to the cart checkbox will be enabled and date field will be editable mode and when I try to add the item for second-time date field should be non-editable this I am doing using if condition. So how can I make date field non-editable in if condition?

I need to add date non-editable in if condition below.