Javascript doesn't have a good enough standard library to execute on this. You need frameworks just to patch up the runtime (or otherwise avoid the holes). Last time I checked they didn't even have decent hashmap or set implementations (let alone decent serde support).
ES6 modules make it straightforward to reform great piles of unstructured JS hackery into hierarchical dependency-controlled units for which you can actually reliably draw a block diagram. Hmm, or maybe get Claude to draw it for you ...
Alright, I've been in the industry a very long time but moved to backend when it got complex. I am wondering why you need a decent hash map or set implementation. This is supposed to be done on the backend. The frontend is for presentation. Your backend should not give you elements with duplicates (why you don't need set). "Decent hash map" sounds like you just don't like the hash map implementation because you are trying to do something complex with the Map implementation, in which case it belongs on the backend.
