WordPress / jQuery snippet for moving custom image classes up to the caption on captioned images

wordpress-image-classes-on-captioned-images.js

	/** 
	 * Hoist custom image classes up to the caption that wraps it
	 */
    $('figure.wp-caption').each(function() {
    	var caption = $(this);
    	caption.removeAttr('width').css('width', ''); // remove width attribute
    	var img = $(this).find('img'); 
    	var imgClasses = img.attr('class').split(/\s+/); // list of classes
    	imgClasses.forEach(function(element) { 
			img.removeClass(element); // remove from image
			caption.addClass(element); // add to image's containing element
    	});
	});