onWillPop property Null safety

WillPopCallback? onWillPop

Enables the form to veto attempts by the user to dismiss the ModalRoute that contains the form.

If the callback returns a Future that resolves to false, the form's route will not be popped.

See also:

  • WillPopScope, another widget that provides a way to intercept the back button.


final WillPopCallback? onWillPop;