Based on current developments, there is no official stable release for Eaglercraft 1.13. Most active versions of Eaglercraft are based on 1.5.2 or 1.8.8.
Eaglercraft 1.13: A Comprehensive Review
The original Eaglercraft (often referred to as v1.8.8) became famous for its robust multiplayer support via WebSocket servers (WebSocket is a protocol that allows real-time communication between a browser and a server). You could join LAN worlds or dedicated servers using nothing but a URL. eaglercraft 1.13
Engine Upgrades: Version 1.13 adopted LWJGL 3, a newer graphics library that is significantly more difficult to port to a browser-compatible JavaScript environment than the older versions used for Eaglercraft 1.5.2 or 1.8.8.
If you want to test the bleeding edge, do not go to the official site. You need to look for community mirrors hosting the "1.13 Protocol" version. Based on current developments, there is no official
However, the community is actively working on modernizing the platform. Here is the current state of Eaglercraft 1.13 and how you can "create" or participate in that ecosystem: 1. The 1.13 Port Status
The project was originally created by LAX1DUDE in late 2021, with later contributions from ayunami2000. It gained massive popularity because it is free, open-source, and accessible, often being used by students on school-issued devices where standard gaming sites are blocked. The Technical Challenge of 1.13 You could join LAN worlds or dedicated servers
The demand for 1.13 is huge. Because Eaglercraft is open source, developers are chipping away at the "Flattening" puzzle every day. We expect a fully playable, semi-stable version of Eaglercraft 1.13 to land by the end of this year.