Question

I want to know in below case will the browser stop traversing the DOM after getting the first .myclass

   $(".myclass").eq(0)

Answer 1

I don’t believe so.

$(".myclass")

Will return a jQuery object that (behind the scenes) contains an array of all matching DOM elements.

You are then calling a method on that object to return the first element.

If you want to avoid this, you need your selector to only select one element. Take a look at the documentation for selectors:

http://docs.jquery.com/Selectors

Try this instead:

$(".myclass:first").eq(0)