I want to implement image hover effect like on this website https://miew.pt/, and the closest example I got or came across can be found here https://github.com/akella/webgl-mouseover-effects

1. I have downloaded and extracted the files but when I run/open e.g step3.html, I am getting errors.

2. I have run yarn add but still getting same error as in point 1.

The error in point 1 & 2 is "Uncaught SyntaxError: Cannot use import statement outside a module"

What's the correct way to set up the code locally(Win 10)?