Willpopscope doesn't work on Web to intercept browsers back button

I have tried intercepting back button on web. But it doesn't get triggered.

How can I make it work ?

 WillPopScope(
                            onWillPop: () {
                              print("will pop on web");
                              Get.offNamed("/orders");
                              return new Future(() => true);
                            },
                            child: Scaffold(...