toast function

void toast (
  1. String message,
  2. {Duration duration: Toast.LENGTH_SHORT}

popup a message in front of screen

duration the duration to show a toast, for most situation, you can use Toast.LENGTH_SHORT and Toast.LENGTH_LONG


void toast(String message, {Duration duration = Toast.LENGTH_SHORT}) {
  if (duration <= {
    //fast fail

  showOverlay((context, t) {
    return Opacity(opacity: t, child: _Toast(content: Text(message)));
  }, curve: Curves.ease, key: const ValueKey('overlay_toast'), duration: duration);