Playing with Web Workers so we can get rid of sheet references in Mesh while not polluting the window scope.

parent.js

var myWorker = new Worker('worker.js');

myWorker.onmessage = (e) => console.log(e.data);
myWorker.postMessage("Hello!");

worker.js

importScripts("libR.min.js");

let numbers = [1, 2, 3];

self.cool = () => hey 
    + " I am a function referencing a variable before it was defined!"
    + "\nLook, I can import and call some R functions from a library! Sum of " + numbers + " is " + libR.R.sum(numbers);
self.hey = " This is a worker!";

onmessage = function(e) {
  postMessage(e.data + cool());
}