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I'm trying to understand how Facebook implements the chat sidebar. It seems to stay there even as I change pages. For example, if I select some text inside the sidebar, then click to go to another Facebook page, the text remains selected. It's as if it was a separate frame, but when I look at the code, it's not.
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Your chat sidebar works in a similar way. The algorithm chooses interactions, activity, communication, photos, etc. This determines which friends will show up on top and have priority. The friends that you communicate with most often will usually be first on this list.
Facebook Chat Sidebar. You may have noticed the new Facebook Chat Sidebar when you logged in to Facebook recently. The list of friends displayed in this sidebar is supposed to be the friends you interact with most. (A few friends and I are finding that the relevancy of the friends in this display is not that accurate!)
Facebook states, “The sidebar is sensitive to the amount of free space you have on your screen, so it only appears if there's enough room for it. If you don't see the sidebar, just click Chat in the bottom right corner of your screen, which shows the same list of friends you'll find in your sidebar.”
Following tests of a new instant messaging platform on Facebook in March 2008, the feature, then-titled "Facebook Chat", was gradually released to users in April 2008. Facebook revamped its messaging platform in November 2010, and subsequently acquired group messaging service Beluga in March 2011, which the company ...
All requests are made trough AJAX calls. Only "content" container is replaced when needed.
You don't actually "go" to another page. Just the "content" div gets updated.
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