[janci]

The website is so fast I did not notice it redrawed when I clicked Part I. I'm impressed.

[jasonbarone]

Oh that's so great to hear, thank you! We use Next.js and content is statically generated.

[cyral]

It's running on NextJS which pre-loads the content of each link in the viewport unless you tell it not to, so it's loading a .json file containing the article content immediately, making the page transition instant when and if you click it.

[RicoElectrico]

It's Javascript URL manipulation trickery, there's an event listener attached to that link.