Since is a web-based version of Minecraft (specifically version 1.8.8), you cannot add mods using traditional methods like Forge or Fabric. Instead, "modding" Eaglercraft involves using Eaglercraft clients that come with pre-installed features or using EaglerXB (client-side plugins) .
EaglerForge is a dedicated modding API and injector designed specifically for Eaglercraft. Download a Base Client: how to add mods on eaglercraft
After uploading the mods, you need to activate them: Since is a web-based version of Minecraft (specifically
If you want the "Next Gen" look with moving grass and water reflections, you need a shader pack compatible with WebGL. how to add mods on eaglercraft
Navigate to /eaglercraft/src/game/java/net/minecraft/src/ . Here are all the game classes in Java.
Most Eaglercraft “mods” are added in two ways: