How fluther knows how many people observing right now my question or answering it in a real time?

How fluther knows how many people observing right now my question or answering it in a real time?
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1 Answer

Answer :

I’m not sure how do they do it exactly, but it shouldn’t be that hard. This site is relying on javascript for a lot of the ‘special’ features (like composing members). Since the site assumes we all use javascript anyway, It could just use the ‘onUnload’ event that is triggered every time a user leaves the page. I’m betting it’s something way cooler and smarter than I can think of though!
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