JsComputer adds a fully programmable in‑game computer to Minecraft.
It features a simulated command‑line shell and a built‑in JavaScript interpreter, allowing players to write scripts, automate tasks, and create advanced logic systems directly inside the game.

This mod is designed to be simple for beginners yet powerful enough for experienced programmers.

Shell Commands

pwd - Shows the current directory
clear - Clears the terminal screen
date - Displays the current date and time
ls - Lists files (option: -l)
js - Executes a JavaScript file
javascript - Alias of js
cd - Changes the current directory
cat - Displays the contents of a file
touch - Creates an empty file
mkdir - Creates a directory (option: -p)
rm - Deletes a file or directory (option: -r)
echo - Prints text or writes to a file
cp - Copies a file
mv - Moves or renames a file
edit - Opens the built‑in text editor
help - Shows the help menu

JavaScript API

The core of JsComputer is its embedded JavaScript engine.
Players can write JavaScript code to automate tasks, interact with the world, and build custom logic.

You have access to certain native Java classes, including:

Integer
Long
Double
Float
Boolean
String
Character
Math
Random
Number
Objects
Array
Date
Calendar
TimeZone
Locale
LocalDate
LocalDateTime

In addition to standard Java classes, JsComputer also exposes custom APIs designed specifically for Minecraft scripting:

IO
- print(text)
- println(text)
- readln()
- readln(prompt)
Utils
- sleep(ms)
- getBlock(x,y,z) return the name of the block. Example: minecraft:dirt
- getBlockRelative(x,y,z)
- getDimension() return the name of the dimension
- now() same as System.currentTimeMillis();
FS
- createFile(path)
- createFile(path, data)
- createDirectory(path)
- deleteFile(path)
- deleteDirectory(path)
- readFile(path)
- writeFile(path, data)
- appendFile(path, data)
- moveFile(path, newPath)
- copyFile(path, newPath)
- listFiles(path)
- isDirectory(path)
- exists(path)
- normalizePath(path)
Redstone
- read()
- read(side)
- write(side, power)
- write(power)
- getOutput(side)
- clear()
Net (only for version 1.1+)
- get(urlStr) returns the URL response as an object with two parameters (code and body)

The API is sandboxed to keep gameplay safe and balanced.