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Re:Echochamber.js by Nadya on Tuesday July 14, 2015 @07:07PM (#9888671)
Only their own - as they wouldn't have access to any other users' local storage. That's the point.

They aren't actually commenting - they're saving data into their browser's localStorage which is getting read and fed onto the page when they view it.

Since they aren't actually commenting - there's no way of showing other people's comments.

Re:Echochamber.js by helmett on Tuesday July 14, 2015 @07:09PM (#9888682)
Oh, then I would be somewhat suspicious only seeing a single comment, especially if the site is popular and there should be more comments.
Re:Echochamber.js by Nadya on Tuesday July 14, 2015 @07:25PM (#9888759)
I don't think they intend it to be used. If the title wasn't "echochamber" I would be more inclined to believe otherwise, but I'm leaning towards this being satire. It's a joke - just like DICSS [0].

[0] https://github.com/letsgetrandy/DICSS