onValueChange property
(void Function(dynamic next, {dynamic prev})?)
onValueChange
final
It is called every-time the widget's value changes.
This property is handy in cases where you want to generate a side-effect on value selection.
For example: You want to show a pop-up modal with the valid discount coupon code when a user searches for a product in a SearchBox
.
Implementation
final void Function(dynamic next, {dynamic prev})? onValueChange;