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WorldJS

KubeJS addon for changing world generation features

NeoForge
Loaders
NeoForge
Downloads on Modrinth
2.8K
Followers on Modrinth
12
versions
4
Updated
October 3, 2026Oct 3
Published
in 2024

At a glance

Runs on NeoForge
For Minecraft 1.21.1
Server only — players don't need to install it
Latest version — 1.1.1 from October 3, 2026
License MIT — free
Where it's needed
In gamenot neededOn serverrequired

Install on the server only; players don't need it

Game versions1.21.1

World generation integration for KubeJS. Allows for the addition of configured features, placed features, and biome modifiers using KubeJS's ServerEvents.registry

Supports:

  • All vanilla configured feature types (+ a WorldJS custom type)
  • All vanilla placement modifier types (+ placed features)
  • All NeoForge biome modifiers

Additionally, support for other placement modifier types can be added with the provided PlacedFeatureModifierEvent

Example

ServerEvents.registry('worldgen/configured_feature', event => {
    event.create('delta_feature', 'delta_feature')
        .size([11, 15])
        .rimSize([1, 3])
        .rim('minecraft:calcite')
        .contents('minecraft:lava')
        .withPlacement('minecraft:delta', p => { // Overwrite the vanilla placed feature
            p.modifiers(modifiers => {
                let { minecraft } = modifiers
                minecraft
                    .countOnEveryLayer(40)
                    .biome()
            })
        })
})

A basalt delta with the calcite delta feature from the example

FAQ

How to install WorldJS?

Install NeoForge for your Minecraft version, download WorldJS for the same version and loader, put the file into the mods folder and launch the game with the loader profile.

Which Minecraft versions does WorldJS support?

WorldJS has builds for Minecraft 1.21.1.

Is WorldJS needed on the server?

Server only — players don't need to install it

License and source
MIT Licensefree to use and share with credit to the author
Original — Modrinth↗Files unchanged, verified with SHA-512Is this your mod? For rights holders

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