How do I learn to animate vector graphics in a website?

I'm looking at sites like these and wondering how they do it: https://dribbble.com/shots/5971566-demo-of-animated-web

Where would I look to learn a little bit more about it? I tried looking through udemy courses/YouTube online resouces etc, but I can't find anything that talks about creating a website like this one.

What do they use? Where can I learn how to do this?