Here  http://api.jquery.com/prevAll/#comment-33411999 guest asks about element order in prevAll function.

So my questions are: 

• does inverse order guaranteed
• why this feature isnt documented

.class2 #id21

.class3 #id31

.class2 #id22

.class3 #id32

.class3 #id33

.class1 #id4

i'm have a node #id32 and i need first preceeding .class2

so i'm do $("#id33").prevAll(".class2").first()

could i rely on inverse order or once it could be broken