The attached document illustrates the blog post and will allow you to explore Alternate States for yourself.
Note that at the time of writing the app must be imported into Qlik Cloud in order to function correctly. Some alternate state functionality is there in September 2018, but the selections bar and the UI for setting states is not present.
I hope that you find the application useful. You will find other applications that I have uploaded under my profile on QlikCommunity or on our Downloads page..