@noiob depending on what I want to do, here I either go with https://quassy.github.io/elementary-apps/NaSC/ or http://www.isthe.com/chongo/tech/comp/calc/ in the CLI.
@aperezdc I might've not explained it well but I specifically wanna work with 1D/2D lists of data
@noiob ahh, got it, sorry for jumping in with a somewhat unrelated answer… should've read more carefully.
Instead of localc (bloated, IMO) for a while I used Gnumeric (lighter), but a couple of years ago I settled on https://github.com/andmarti1424/sc-im which has Lua scripting. I haven't tried the scripting support, and it's not JavaScript as you asked for, but maybe it'll do for you.
@noiob no problem at all 🤗
@aperezdc thanks anyways