If you've seen it and are curious about it, and want to execute it but don't know how, there are plenty of ways you can do it on the Web. You don't need to install Node.js on your machine if you don't want to.
But you can run it on the Web. Here are a few places where this is possible:
replitlets you "build software collaboratively with the power of AI, on any device, without spending a second on setup".
CodeSandbox"keeps you in flow by giving you cloud development environments that resume in 1 second".
So what are you waiting for? Stare at the code, try and work out what it's doing, what it emits, and if you get stuck, run it in one of these Web-based environments and see where it leads you. And have fun!