# Flutter Attach## OverviewA Flutter-command that attaches to applications that have been launchedwithout `flutter run` and provides a HotRunner (enabling hot reload/restart).## Usage
1. If the platform is Fuchsia the module name must be provided, e.g. `$flutter attach --module=mod_name`. This can be called either before or afterthe application is started, attach will poll the device if it cannotimmediately discover the port
1. On Android and iOS, just running `flutter attach` suffices. Flutter toolswill search for an already running Flutter app or module if available.Otherwise, the tool will wait for the next Flutter app or module to launchbefore attaching.1. If the app or module is already running and the specific observatory port isknown, it can be explicitly provided to attach via the command-line, e.g.`$ flutter attach --debug-port 12345`