[Bug 20246] Provide a system to observe nodes entering and leaving the viewport

https://www.w3.org/Bugs/Public/show_bug.cgi?id=20246

--- Comment #4 from louisremi <lrbabe@gmail.com> ---
Another use-case I forgot to mention is the ability to remove things from the
DOM as they leave the viewport (just to free up memory) or to pause CSS3
Animations and requestAnimationFrame loops.

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Received on Wednesday, 5 December 2012 17:43:48 UTC