How to build a single page drupal site?

Hello, 

I have watched a UX Turbo symfony tutorial which covers on how to build a single page application. I have noticed that as I am navigating thru pages, there is no page refresh. 

From google search, this came up first.

https://www.drupal.org/project/spalp

Some of the D8 sites that I built, pages refresh and browsers spin as the pages are loading. Can you refer me to some resources on how to build a single page drupal site so I  can learn more about it?

Thanks!