Eaglercraft-server
A likely means you’re looking for an in‑depth guide to setting up your own Eaglercraft server, or explaining how the server‑side works.
It looks like you’re referencing , which is a version of Minecraft (specifically Beta 1.5.2 through 1.8.8 in some branches) that runs entirely in a web browser using JavaScript/WebGL, without needing a native Java installation. eaglercraft-server