JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.4/themes/ui-lightness/jquery-ui.css">
<img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img src="http://t0.gstatic.com/images?q=tbn:ANd9GcTOljCw6ffQ1SuBLsztIdbpn9UDXvmUvfe9vu3IGVHvaKaPCjMdyA"/><img...

CSS

img {
    height: 50px;
}
.temp {
    border-bottom: 1px solid red;
}

JavaScript

$('img:nth-child(3n)').each(function(){
    $(this).prevAll('img').andSelf().wrapAll('<div/>');
});