Rhino

Rhino is a modified fork of Mozilla’s Rhino library for Minecraft mods. It provides a JavaScript engine with ES6 support without relying on Nashorn, which was removed in Java 15. Rhino does nothing on its own; it is a library used by KubeJS.

Available for Forge, Fabric, Quilt and NeoForge on Minecraft 1.18.2–26.1.2. Rent your own Minecraft server and install Rhino with one click from the panel when your KubeJS setup needs it.