How do I import javascript to my project?

I found this confetti effect made with javascript.

https://www.construct.net/en/tutorials/confetti-effect-javascript-2508

I tried copy&paste but it doesn't seem to work.

How can I import the effect and use it in my project?

Moved to Scripting forum. Please don't re-post the same thread.

ok so by just glancing at it, it doesn'T use modules so set scripts type to classic, and it uses the window context so turn worker off, but you should probably open the console yourself and check for error messages