Graal Mod FAQ

Create a JavaScript file in your mod's script directory and use the Graal runtime to load it—the mod will execute ECMAScript-compliant code directly in your game environment. Check the 'Write Your First JavaScript Script for Graal Mod' guide for a step-by-step walkthrough with example code.

Yes, Graal Mod lets you interact with Java directly from JavaScript, allowing your scripts to access game objects and methods. Use MemberRemapper if you want to rename Java methods or fields to make them more convenient in your scripts.

Graal Mod bundles a stripped-down version of GraalJS that removes unnecessary files, cutting the total size roughly in half while keeping full ECMAScript compliance. This keeps your game lighter without sacrificing functionality.

Graal Mod allows different mods to share a common scripting layer where they can call each other's functions and pass data through the JavaScript runtime. See 'Communicate Between Multiple Mods Using Graal Scripts' for patterns and examples.

Avoid unnecessary Java calls in tight loops, cache frequently-accessed objects, and use native JavaScript operations where possible. The 'Optimize Script Performance and Reduce File Size' guide covers profiling and best practices.

Yes, use the MemberRemapper tool included with Graal Mod to create aliases for Java methods and fields, making your JavaScript code cleaner and more readable. The 'Use MemberRemapper to Rename Java Methods in Scripts' guide shows how to set this up.

Graal Mod is designed as a lightweight foundation for script-driven mods and can coexist with other mods, though direct script communication between different scripting systems depends on how those mods are built.

Graal Mod delivers full ECMAScript standards compliance, so you can use modern JavaScript features like arrow functions, promises, destructuring, and more—just as you would in a browser or Node.js environment.

Graal Mod runs JavaScript in the game environment, so you're limited to libraries that don't depend on browser or Node.js APIs; however, you can bundle compatible libraries directly into your mod's script files.

Check that your script file is in the correct directory, uses valid ECMAScript syntax, and that any Java interop calls reference classes that actually exist. Enable debug logging to see error messages from the Graal runtime.