Javascript threads

worker-on-fly.js

var workerFunction = function() {
    self.onmessage = function(e) {
      self.postMessage('msg from worker' + e.data);
      self.close();
    };
};

var createWorker = fn => {
  var workerFunctionBlob = new Blob(['('+fn.toString()+')()'], { type: "text/javascript" });
  var worker = new Worker(URL.createObjectURL(workerFunctionBlob));
  URL.revokeObjectURL(workerFunctionBlob); // free fake blob url
  return worker;
};

var worker = createWorker(workerFunction);

worker.onmessage = function(e) {
  console.log("Received: " + e.data);
}

worker.postMessage("hello"); // Start the worker.