can you change what a mob drops in kube js

Natashya

3 min read

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02-02-2025

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Yes, you can absolutely change what mobs drop in KubeJS! KubeJS is a powerful modding tool for Minecraft that allows extensive customization, and altering mob drops is a common and relatively straightforward task. This guide will walk you through the process, covering different scenarios and techniques.

Understanding KubeJS and its Capabilities

KubeJS leverages the power of JavaScript to modify various aspects of Minecraft. It allows you to create custom recipes, add new items, adjust existing mechanics, and, as we'll focus on here, modify mob loot tables. Loot tables are data files that define what items a mob drops upon death. KubeJS provides an elegant way to access and manipulate these tables.

Modifying Mob Drops with KubeJS: A Step-by-Step Guide

The core of modifying mob drops involves using KubeJS to directly edit the loot tables. Here's a breakdown of how to do this:

1. Accessing the Loot Table

First, you need to identify the loot table associated with the mob you want to modify. Loot tables are usually located in the data/<mod_id>/loot_tables/entities/ folder. For example, the loot table for a vanilla zombie might be found in data/minecraft/loot_tables/entities/zombie.json. KubeJS provides functions to access these tables without directly manipulating the JSON files.

2. Using the loot Namespace

The KubeJS loot namespace provides the necessary functions to modify loot tables. The key function is generally loot.addEntry. This function takes the loot table location as a string, the item to add, and other parameters to define the drop rate, count, etc.

3. Adding a New Drop

Let's say you want to make zombies drop emeralds. Here's an example of the KubeJS script you would use:

events.listen('loot', function(event){
  event.addEntry('minecraft:entities/zombie', {
      'item': 'minecraft:emerald',
      'weight': 5, // Adjust the weight to control drop chance
      'minCount': 1, // Minimum number of emeralds dropped
      'maxCount': 3, // Maximum number of emeralds dropped
  });
});

This code adds an emerald to the zombie's loot table. The weight parameter influences the probability of the emerald dropping. Higher weight means a higher chance. minCount and maxCount determine the range of emeralds dropped per kill.

4. Replacing Existing Drops

You can also replace existing drops. This is useful if you want to completely change what a mob drops instead of adding to it. Replacing requires removing the old entry and then adding the new one. Removing an entry necessitates identifying its exact parameters within the loot table, often requiring inspecting the JSON file manually to obtain the unique identifier. This process can be more complex and error-prone.

5. Advanced Techniques: Conditions and Functions

For more complex scenarios, you can add conditions to control when an item drops. For example, you could make a mob drop a specific item only at night. You can also utilize custom KubeJS functions within your loot table modifications for greater flexibility.

Example: Modifying the Creeper Loot Table

Let's imagine we want creepers to drop gunpowder with a higher chance and also drop a small amount of experience orbs.

events.listen('loot', function(event){
  event.addEntry('minecraft:entities/creeper', {
      'item': 'minecraft:gunpowder',
      'weight': 15,
      'minCount': 1,
      'maxCount': 3,
  });
  event.addEntry('minecraft:entities/creeper', {
      'item': 'minecraft:experience_bottle',
      'weight': 2,
      'minCount': 1,
      'maxCount': 1,
  });
});

This script boosts gunpowder drops while adding a small experience bottle drop to the creeper's loot.

Important Considerations

• Mod Compatibility: Ensure your KubeJS script is compatible with any other mods that might alter the same loot tables. Conflicts can occur, resulting in unexpected behavior.
• Backup your world: Before making significant changes to loot tables, always back up your world! This safeguards against accidental data loss.
• Testing: After implementing changes, test thoroughly to ensure the modifications work as intended.

By mastering the techniques outlined above, you can significantly alter the loot drops of any mob in your Minecraft world using the power of KubeJS. Remember to experiment, explore the loot namespace functions, and consult the KubeJS documentation for more advanced options and possibilities.