delapuente

window.onkeypress = function(event) {
  console.log(event.which || event.keyCode);
};

delapuente

alert('Hello!');

delapuente

var canvasX, canvasY;
theCanvas.onmousemove = transformIntoCanvasRelative;
function transformIntoCanvasRelative(evt) {
  var canvas = evt.target;
  var rect = canvas.getBoundingClientRect();
  canvasX = evt.clientX - rect.left;
  canvasY = evt.clientY - rect.top;
}

delapuente

/*
Used to include another JS file.
*/
FIB_URL = 'https://gist.githubusercontent.com/lodr/6879872/raw/1dd7315fbac1194abf40406331cf825f74b71ccb/fib.js';
importScripts(FIB_URL);

/*
This is used to receive data from the parent.
*/
onmessage = function(evt) {

delapuente

function fib(x) {
  if (x <= 2) return 1;
  return fib(x-1) + fib(x-2);
}

delapuente

load([
{"task":"HTML I","done":true},
{"task":"CSS","done":true},
{"task":"Responsive design","done":true},
{"task":"Git","done":true},
{"task":"JavaScript I","done":true},
{"task":"JavaScript II","done":false}
]);

delapuente

function fPromise(timeout, result, error) {
  return new Promise(function(fulfill, reject) {
    setTimeout(function () {
      if (!error) fulfill(result);
      else if (error instanceof Error) throw error;
      else reject(error);
    }, timeout);
  });
}

delapuente

function retry(target, keepTrying) {
  var retryCount = 1;
  var fulfill, reject;

  var promise = new Promise(function (f, r) {
    fulfill = f;
    reject = r;
  });
  
  realRetry();

delapuente

Function.prototype.retryWhile = function(keepTrying) {
  var target = this;
  var retryCount = 1;
  var fulfill, reject;

  var promise = new Promise(function (f, r) {
    fulfill = f;
    reject = r;
  });
  

delapuente

function PromiseChain() { this._current = null; }

PromiseChain.prototype.add = function (task) {
  if (this._current === null) {
    this._current = task();
  }
  else {
    var next = function () { return task(); };
    this._current = this._current.then(next, next);
  }