Attribute Filters:
i)Compare class and id, create an id attribute with class attribute.
ii) Add new id using class attribute as a handle.
iii) Creating class Attribute with multiple values:
 Refresh/Reload -||- add "id=x3" with $("[class=x3]"
@ use nascent $("[id=x3]"):add .x4 :overlapping x3:x4
@ use nascent $("[id=x3]"):add css style :overriding class  
Div1