inline Web Workers

webworkers.js

function WebWorker (fn) {
  var src = '(' + fn.toString() + ')();';
  var blob = new Blob([src], { "type" : "text/javascript" });
  var url = URL.createObjectURL(blob);
  return new Worker(url);
}

var get = WebWorker(function() {
  onmessage = function (e) {
    var url = e.data;
    var oReq = new XMLHttpRequest();
    function reqListener () {
      postMessage(this.responseText);
    };
    oReq.onload = reqListener;
    oReq.open("get", url, true);
    oReq.send();
  }
});

get.postMessage("http://jsbin.com/");
get.onmessage = function (e) {
  console.log(e.data);
}