No. This is the hard limit. Server plugins can simulate new items (e.g., a stick renamed to “Lightning Wand” that executes a command), but they cannot render a new 3D model on the client. The Eaglercraft client has a fixed set of blocks and items. If the client doesn’t have a model and icon for “Titanium Ore,” you’ll see a purple/black checkerboard or nothing at all.
To truly add new blocks/items, you’d need to modify the client and the server – a full-on fork of Eaglercraft itself.
The original Eaglercraft project’s source code (Java that compiles to JS) is available on GitHub.
You can: can i add mods to eaglercraft
This is the closest thing to “making a mod” for Eaglercraft, but it requires Java development skills.
Limitation: No new blocks/items on client – just server logic. The original Eaglercraft project’s source code (Java that
If you have the unminified source code or a developer build:
Here’s where the “can I add mods” question gets a massive YES – if you control the server. This is the closest thing to “making a
Eaglercraft is not just a client; it’s also a modified server backend. The original Eaglercraft project includes a server software written in Java (ironically) that communicates with the JavaScript client via WebSockets.