This site is so clean. If the creator sees this, or if anyone else has the knowledge or pointers, I would like to know how to create a basic one page site with a map interface just like this one. I have zero programming experience for reference.
Not the author, but McBroken looks to be built with Mapbox's Javascript library, so you'll need to break out a text editor. They have some good starter docs here:
https://docs.mapbox.com/mapbox-gl-js/example/simple-map/
You can learn a lot by signing up for an API key from Mapbox and tweaking their example code. They even provide online editors so you don't even need to work with an HTML file locally (though I'd still recommend that for permanence). No React, no Webpack needed!
This site receives all its data via vector tiles [0]. So as you pan around, you fetch basic visual map information (what the geography looks like) and McDonald's data at the same time.