How to debounce Textfield onChange in Dart?

You can make `Debouncer` class using `Timer`

import 'package:flutter/foundation.dart';
import 'dart:async';

class Debouncer {
final int milliseconds;
Timer? _timer;

Debouncer({required this.milliseconds});

run(VoidCallback action) {
_timer?.cancel();
_timer = Timer(Duration(milliseconds: milliseconds), action);
}
}

Declare it

final _debouncer = Debouncer(milliseconds: 500);

and trigger it

onTextChange(String text) {
_debouncer.run(() => print(text));
}

This solution works for me using RxDart

final _search = TextEditingController(text: '');
RxString searchText = ''.obs;

@override
void initState() {
super.initState();
_search.addListener(() {
searchText.value = _search.text;
});
debounce(searchText, (_) {
listenToSearch();
}, time: const Duration(seconds: 1));
}

listenToSearch() {
AlertsFilterModel filter = widget.filter;
filter.searchText = _search.text;
widget.sendAlertFilters(filter);
}