onValueChange property

(void Function(dynamic next, {dynamic prev})?) onValueChange

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;