Javascript: How to calculate the exact position of the viewport?
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Published on 2010-05-20T04:00:40Z
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2010/05/20
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My problem is I need to get the position of the viewport relative to the extent of the entire document. I am only concerned with Firefox.
My issue is that everything I have read says that:
viewport height is window.innerHeight
scroll position is window.pageYOffset
document total height is document.height
So, I would expect that if I scrolled to the bottom of a page that window.innerHeight + window.pageYOffset = document.height
But it doesn't! Can someone please explain to me why this is?
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