Jquery - How to find an element using class and attribute

Question

I am trying to figure out the most efficient way to find my element. Following i smy structure:

Answer 1

Remove the space:

$("div.a[customattrib='2']")

By putting in the space, you're making it into a descendant selector which finds all elements that match [customattrib='2'] and are inside an element that matches div.a.