Added a new category of block presets to KubeJS, allowing players to set custom survival rules for created blocks. (More features coming soon)
Currently added kinds:
- Determination of the bottom block
- Determination of whether the immediate neighboring faces are complete or not
The full list of methods is below:
- customSurviveRule( Json ) (use json to customize the survival rule)
- surviveType( String ) (select a preset rule for surviving blocks, see below for details)
- catchAllDirection( Boolean ) (enable full face all match mode)
Optional json statement:
- "setFaceSturdy" : String[]
- (set a list of directions, make the blocks detect if the neighboring faces of the directions in the list are all faces, if any direction meets the condition, all matches need to enable all-face-match mode)
- (optional values: "up" "down" "east" "west" "south" "north")
- "setBelowBlock" : String[]
- (set a list of blocks so that blocks must be placed on the blocks in the list)
- (optional: full block id, e.g. "minecraft:stone", no way to match blockstate yet because it's not done yet)
Future plans:
- More survival rules with preset types
- Custom HUD
- Custom GUI
Usage examples:
StartupEvents.registry ("block", e=> {
e.create ("block_name", "super_block")
.surviveType ("custom")
.customSurviveRule (
{
"setFaceSturdy" : ["up", "down"],
"setBelowBlock" : ["minecraft:stone", "minecraft:oak_log", "minecraft:campfire"]
})
.catchAllDirection (false)
})
Quick facts
- Edition: Minecraft Java
- File type: .jar
- Minecraft versions listed: 1.20.1, 1.20.2, 1.20.3
- 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 Modrinth — 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.
Verified by MCModsHub
- Ships as randomjs-1.0.0-ALPHA-FIX.jar — drop this file into the mods folder
- Download size: 13 KB
- Download link checked 7 Sept 2026 — working
These come from our own check of the pack file, not from the source page.
