web worker demo

commander.js

var
worker = new Worker('js/worker.js')
, btn = document.getElementById('button')
;

worker.addEventListener('message', function(e) {
    console.log('Worker said: ', e.data);
}, false);

btn.addEventListener('click', function(e) {
  var
  max = 100
  , min = 1
  , rand1 = Math.floor(Math.random() * (max - min + 1)) + min
  , rand2 = Math.floor(Math.random() * (max - min + 1)) + min
  ;

  console.log(rand1, rand2);
  worker.postMessage([rand1, rand2]); // Send data to our worker.
  e.preventDefault();
}, false);

worker.js

var add = function(data) {
    return data[0] + data[1];
};

self.addEventListener('message', function(e) {
    self.postMessage(add(e.data));
}, false);