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How is “Someone is typing a comment...” implemented in Facebook?
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October 11th, 2016
This is a new feature Facebook added, like each post now is a chat room and you can see in real time when someone is writing comment. How? Is there a communication channel open that checks every X seconds if there are comments being written and raise a flag that displays it to me? Interesting to know how it can be done in web programming. Do you think is it the same way fluther tells us when someone write answers?
Using Fluther
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