difference between document.documentElement.clientHeight and document.body.clientHeight

Question

What is the difference between document.documentElement.clientHeight and document.body.clientHeight? Are the return values consistent across all we

Answer 1

Let's ask good old firebug (for the sake of being lazy, I did it right here on SO) for the different between those two objects:

>>> document.documentElement

>>> document.body

So, document.documentElement points to the top-level element while document.body points to the element.