With no disrespect intended to the authors, the website doesn't seem to be quite right as-is. Whenever I click any of the big buttons, I get a flash of white across the whole screen. This is off-putting, especially when navigating between pages doesn't incur this on a "normal" static HTML website.
I normally wouldn't bring this up but the article is very specifically talking about the benefits of using this web framework, so it seems apropos.