MultiblockJS
The author built this one for Minecraft 1.21.1 on NeoForge. On other versions it may install and then do nothing.
You can use this mod to customize multiblock structures with KubeJS and add recipes for them.
#How to use
If you wan to use,create a multiblock controller
```
StartupEvents.registry('block',event=>{
event.create('kubejs:test_controller','multiblockjs:controller')
})
```
Then create your structure
```
MjsEvents.definition(event=>{
// Structure ID Controller
// | |
// v v
event.addStructure('port_test_1','kubejs:test_controller',[
// The part of the multiblock uses relative coordinates
[0,1,0,'minecraft:stone'],
[1,1,0,'minecraft:stone'],
[-1,1,0,'minecraft:stone'],
[1,0,0,'kubejs:test_item_port'],
[-1,0,0,'kubejs:test_item_port']
])
})
```
If you want to obtain relative coordinates, place the Controller at 0,0,0. At this time, the coordinates of each block in the world are the relative coordinates.
You can use port to parse recipe
.setSize() is the number of slots
```
StartupEvents.registry('block',event=>{
event.create('kubejs:test_item_port','multiblockjs:item_port')
.setSize(2)
})
```
Then add recipe
It is also relative coordinates
```
MjsEvents.recipe(event=>{
event.addRecipe('kubejs:test_controller',20,[
[
"item",
"input",
1,0,0,
'minecraft:iron_ingot',1
],
[
"item",
"output",
-1,0,0,
'minecraft:copper_ingot',2
]
])
event.addRecipe('kubejs:test_controller',200,[
[
"item",
"input",
1,0,0,
'minecraft:copper_ingot',1
],
[
"item",
"output",
-1,0,0,
'minecraft:gold_ingot',2
]
])
})
```
- Edition: Minecraft Java
- File type: .jar
- Minecraft version listed: 1.21.1
- How to install: Install the matching mod loader (Forge, Fabric or NeoForge) for your Minecraft version. → Download the .jar. → Put it in the .minecraft/mods folder and launch that loader profile.
- Where to get it: Opens on CurseForge — not every file is mirrored on our own servers.
Install steps are the general flow for this file type — How to install Minecraft Java mods & modpacks walks through it step by step.
- Ships as multiblockjs-1.1.1.jar — drop this file into the mods folder
- Download size: 80 KB
- Download link checked 13 Sept 2026 — working
These come from our own check of the pack file, not from the source page.