作为AJAX调用的结果的HTML(优点和缺点)

What is your opinion (PRO an CONS) about returning HTML code as a result for an AJAX call. It is, if the app creates a new item in a list and it needs some extra parameters or some pattern customization, instead of modify it through JS, we can send it templatized through an AJAX call. What is your opinion (PRO an CONS) about return