Example 4-17. Simple deferred object in jQuery

function loadImage(url) {
	var deferred = jQuery.Deferred();
	var img = new Image();
	img.src = url;

	img.onload = function () {
		deferred.resolve(img);
	};
	
	img.onerror = function (e) {
		deferred.reject(e);
	};

	return deferred;
}