New and previous input value.
TxValueChange
| Parameter | Type | Default | Meaning |
|---|---|---|---|
| value | T | required | Current input/option value. |
| previousValue | T | required | Value before the change. |
import 'package:tecexpress/tecexpress.dart';
Future<void> example() async {
const change = TxValueChange(value: 2, previousValue: 1);
print(change.value);
}