imgloaded.js

/**
 * How to:
 * $('div.container').imagesLoaded(function(){console.log('all images loaded in .container');});
 * In case you need to support IE8, you need to use HTML5shiv **and** need to modify jQuery the following way:
 * https://github.com/jquery/jquery/commit/a9533893b9e5e9a248139f5794c5d6099382cf14
 */
(function($){
	'use strict';
	$.fn.imagesLoaded = (function(){
		var imageLoaded = function (img, cb, delay){
			var timer;
			var isReponsive = false;
			var  $parent = $(img).parent();
			var $img = $('<img />');
			var srcset = $(img).attr('srcset');
			var src = $(img).attr('src');
			var onload = function(){
				$img.off('load error', onload);
				clearTimeout(timer);
				cb();
			};

			if(delay){
				timer = setTimeout(onload, delay);
			}

			$img.on('load error', onload);

			if($parent.is('picture')){
				$parent = $parent.clone();
				$parent.find('img').remove().end();
				$parent.append($img);
				isReponsive = true;
			}

			if(srcset){
				$img.attr('srcset', srcset);
				if(!isReponsive){
					$img.appendTo(document.createElement('div'));
				}
				isReponsive = true;
			} else if(src){
				$img.attr('src', src);
			}

			if(isReponsive && !window.HTMLPictureElement){
				if(window.respimage){
					window.respimage({elements: [$img[0]]});
				} else if(window.picturefill){
					window.picturefill({elements: [$img[0]]});
				} else if(src){
					$img.attr('src', src);
				}
			}
		};

		return function(cb){
			var i = 0;
			var $imgs = $('img', this).add(this.filter('img'));
			var ready = function(){
				i++;
				if(i >= $imgs.length){
					cb();
				}
			};
			$imgs.each(function(){
				imageLoaded(this, ready);
			});
			return this;
		};
	})();
})(jQuery);

Handy script! But I noticed that it screws responsive images using srcset and sizes because it ignores the sizes attribute. This leads to the largest source being loaded. Works fine when the sizesvalue is added before applying the srcset to the <img> element created.
https://gist.github.com/hatsumatsu/b946fee531aa32a17808

This doesn't seem to work in IE11 ? Can you replicate ?