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Editorial Team
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Asked: 2026-05-31T05:21:09+00:00

I’m really interested on how facebook loads only content when someone else has posted

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I’m really interested on how facebook loads only content when someone else has posted something. The only thing that I can think of is using something like the one below to constantly update the page without reloading the page.

setInterval(ajax_stuff, 1000);

I was watching the console and indeed the request occurs and another new content is added to the page.

enter image description here

I want to be enlightened on how is this done. It would really be awesome if I can use this on a project. I mean doing setInterval every second really consumes much resource. Making a request only when its needed would be the best way to do things. Specifically I want to use it on this project:

https://github.com/anchetaWern/ChatRo

It’s basically just a chat box, currently it still uses the setInterval(). I want to update only the content when someone else on the chat session has actually entered something.

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1 Answer

  1. Editorial Team

    I cannot speak directly to how FaceBook does this, but in general, you should be looking at WebSockets.

    WebSockets allow the JavaScript on your page to maintain an open connection with a server whereby you can push data out in near-realtime to all of the clients connected to the server.

    Take a look at http://pusher.com

    Also, google Web Sockets.

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