How can I determine if a div is scrolled to the bottom?

Question

How do I determine, without using jQuery or any other JavaScript library, if a div with a vertical scrollbar is scrolled all the way to the bottom?

My question is no

Answer 1

You're pretty close using scrollTop == scrollHeight.

scrollTop refers to the top of the scroll position, which will be scrollHeight - offsetHeight

Your if statement should look like so (don't forget to use triple equals):

if( obj.scrollTop === (obj.scrollHeight - obj.offsetHeight))
{
}

Edit: Corrected my answer, was completely wrong