I know a bit of JS, but idk how its used to make a dynamic site like this.
Looks like everything is being rendered to a canvas that fills the whole screen. Without looking into the source I would assume a lot of it could be done with drawImage()
The main.js file is quite large at ~33k lines. Judging from some of the errors, there’s ReactJS in there. I’m not sure why they’re using the canvas API, but the site is painfully slow to start and then to resize. Stack trace shows that a forEach loop is responsible for slowing the redraw. Not really relevant to the question, but it makes me want to tear my skin off. Really awesome site, otherwise.
So, yeah. ReactJS and the canvas API at least, but I bet there’s some other plugin at work for the image transitions. I also recognize the keyboard control legend as being from some input abstraction library, but I can’t remember the name right now.