JSFiddle - React, Tailwind, and code Playground

JavaScript

var ww = new Worker("http://sandropaganotti.com/wp-content/goodies/misc/simple_ws3.js");

var numbers = [30,31,32,33,34,35,36,37,38,39,40],
    current_number;
ww.postMessage(numbers.shift());

ww.addEventListener("message", function(evt){
    console.log(evt.data);
    if (numbers.length>0) ww.postMessage(numbers.shift());
});
//for(var x=0; x<numbers.length; x++) {
  //  ww.postMessage(numbers[x]);
//}