Flutter web back button

onWillPop: onWillPop is a callback method that returns a Future value; if true, the screen can be popped; if false, the screen will not be popped out . However, the screen can still be popped by calling the Navigator.

How to Implement Double back press to exit in flutter

In order to check when the ‘BACK’ button is pressed, use onBackPressed() method from the Android library . Next, perform a check to see if the ‘BACK’ button is pressed again within 2 seconds and will close the app if it is so. Otherwise, don’t exit.

pop() : Works and is the RECOMMENDED way of exiting the app.