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Looks like this is just a terminal emulator project in javascript.

Project: m3m3n70.com

File: tty.js

Description: Customized web bash terminal

Adapted From: tty.js by Christopher Jeffrey

Authors: Turner Bohlen (turnerbohlen.com), Marwan Hilmi

There has to be some server involved - people can send broadcast messages and the fs maintains state between machines.

It looks like a JS console directly onto a server.