Based on popular GitHub repositories (like catfoolyou/EagsTestServer ), 12 project: Key Features of Eaglercraft 1.12
When using builds from GitHub, you might encounter problems. Here are fixes for the top five issues: eaglercraft 1.12 github
Eaglercraft is not an official Mojang product. It’s a reverse-engineered JavaScript port. The 1.12 version is a fan project and may have bugs (e.g., some redstone, entities, or mods won’t work perfectly). eaglercraft 1.12 github
Eaglercraft 1.12 isn't a clone; it is a direct port of reverse-engineered Java code translated into browser-compatible formats using and OpenGL emulators. eaglercraft 1.12 github