Eaglercraft 1.8 represents a technical marvel in the browser-gaming space, effectively porting the Java Edition of Minecraft 1.8.8 to run on JavaScript and WebGL. When looking for "mods" and links for this version, it is important to distinguish between client-side enhancements and traditional Java Forge/Fabric mods
While "standard" Minecraft Java mods (like .jar files) won't work directly in your browser, the community has developed specific tools to bring modding to Eaglercraft. Here is everything you need to know about finding and installing mods for Eaglercraft 1.8. What is Eaglercraft 1.8? eaglercraft 18 mods link
Also check the (official link on their GitHub) for community-made scripts and resource packs. Eaglercraft 1