Comment by zarzavat

I'm not talking about the back button. I'm talking about history.back() API. If you have a "back" button that is inside the page's viewport, it should work based on the page's logical model. So you go back from Page 5 to Page 4, regardless of where you were before. Only back buttons outside the viewport should work based on browser history. The history is part of the browser it's not part of the page.