Can't import functions from other scripts

[Henry-E]

e.g. import { getProposalInfo, saveProposalInfo } from "./proposal-info"; in a file in the scripts folder.

Trying to import a function from another script gives the error

Relative import paths need explicit file extensions in ECMAScript imports when '--moduleResolution' is 'node16' or 'nodenext'. Did you mean './proposal-info.js'?ts(2835)

Changing from nodenext to bundler doesn't help either because it seems to break other thing nodenext is being used for.

This typescript stuff is super unclear. But trying to note the issue anyway.