An example of a controller.

RefreshImagesOnResize.js

/**
 * This controller pattern relies on a createController method that
 * I typically create in my site.js. To see a boilerplate site.js file
 * that works with this style, see the link below.
 * 
 * @see https://gist.github.com/foleyatwork/f2a67d4a28f43a55d1cd
 */
Site.createController('RefreshImagesOnResize', function() {

  // When using jQuery inside of a controller, just assume the
  // '$' global is available.
  $(window).resize(function() {
    $('img[data-src]').each(function() {
      ImageLoader.load(this);
    });
  });
  
});