Quickstart

This guide is for JSCore 0.2.0, currently supporting 1.21.5 only.

1. Install JSCore

JSCore requires Fabric API and Yarnwrap

• Download JSCore (Modrinth)
• Download Yarnwrap (Modrinth)
• Download Fabric API (Modrinth)

2. Setup JSCore

After launching the game, join a world to run the command

/jscore snapshot pull http://jscore.siri.ws/bootstrap.zip

Then either restart the game or simulate a restart with

/jscore restart

You will need to rejoin world for changes to take effect.

3. Pre-flight Check

Check if the JS runtime is working.

/jscore eval 1 + 1

Or check your in-game position.

/jscore eval let root = Packages.ws.siri.jscore.mapping.JSPackage.getRoot();

/jscore eval let client = root.net.minecraft.client.MinecraftClient.getInstance();

/jscore eval client.player.getBlockPos().toString()

4. Installing Packages

We have a list of all packages you can install without restarting the game.

/pully install package1 package2 ...

Can't make up your mind? Join Discord to learn more about the project.