Notes for HTML5 Game Development by Udacity

gistfile1.md

XMLHttpRequest

1. Create a new request
2. Prepare the request
3. Set the onload callback. The callback can access the response by referencing this.responseText.
4. Send the request

  var xhr = new XMLHttpRequest();
  xhr.open("GET", "/fancy.json", true);
  xhr.onload = function () {
    json = JSON.parse(this.responseText);
    ...
  };
  xhr.send();

Image

1. Create a new image object
2. Set the onload callback. In the callback the image object can be referenced by this.
3. Set image src url

  var  image = new Image();
  image.onload = function() { ... };
  image.src = "/fancy-image.png";```