Multi Instance Handler (multi_instance_handler) #

Detects and handles multiple instances of an application. This library allows you to forward command line arguments from second instances of an application, force a single instance of an application, or both.

Compatibility #

This library is designed for use in Flutter applications. Support in Dart tools is undefined.

This library currently only supports Flutter applications on the Windows platform.

Usage #

import 'package:multi_instance_handler/multi_instance_handler.dart'; void main(List<String> arguments) async { if (await isFirstInstance(arguments)) { onSecondInstance((List<String> args) { print("Second instance launched with: $args"); }); runApp(MyApp()); } else { print("Found existing instance, quitting!"); exit(0); } } 

TODO #

• ❌ Add macOS support
• ❌ Add Linux support
• ❌ Ensure first instance window is hidden when loading (third-party issue).

License & Author #

This library was written by Loren Segal in 2021 and licensed under the terms of the MIT license.