https://github.com/jaaamesey/parra

This is a wrapper around my existing run-with-worker library that allows for parallel computations to run in plain, type-safe (if you're using TS) JavaScript functions.

Similar to run-with-worker, the niche here is for expensive computations that you just want to move to a pool of Web Workers, without the boilerplate and footguns that usually comes with that.

TL;DR: it brings parallel map/reduce functions to JS with only slightly terrible syntax.