Custom Items

This is a startup_scripts/ event

// Listen to item registry event
onEvent('item.registry', event => {
  
  // The texture for this item has to be placed in kubejs/assets/kubejs/textures/item/test_item.png
  // If you want a custom item model, you can create one in Blockbench and put it in kubejs/assets/kubejs/models/item/test_item.json
  event.create('test_item')
  
  // You can chain builder methods as much as you like
  event.create('test_item_2').maxStackSize(16).glow(true)
  
  // You can specify item type as 2nd argument in create(), some types have different available methods
  event.create('custom_sword', 'sword').tier('diamond').attackDamageBaseline(10.0)
})

Valid item types:

  • basic (default)
  • sword
  • pickaxe
  • axe
  • shovel
  • hoe
  • helmet
  • chestplate
  • leggings
  • boots

Other methods item builder supports: [you can chain these methods after create()]

  • maxStackSize(size)
  • unstackable()
  • maxDamage(damage)
  • burnTime(ticks)
  • containerItem(item_id)
  • rarity('rarity')
  • tool(type, level)
  • glow(true/false)
  • tooltip(text...)
  • group('group_id')
  • color(index, colorHex)
  • texture(customTexturePath)
  • parentModel(customParentModel)
  • food(foodBuilder => ...)

Methods available if you use 'sword', 'pickaxe', 'axe', 'shovel' or 'hoe' type:

  • tier('toolTier')
  • modifyTier(tier => ...) // Same syntax as custom tool tier, see below
  • attackDamageBaseline(damage) // You only want to modify this if you are creating a custom weapon such as Spear, Battleaxe, etc.
  • attackDamageBonus(damage)
  • speedBaseline(speed) // Same as attackDamageBaseline, only modify for custom weapon types
  • speed(speed)

Valid tool tiers:

  • wood
  • stone
  • iron
  • gold
  • diamond
  • netherite

Methods available if you use 'helmet', 'chestplate', 'leggings' or 'boots' type:

  • tier('armorTier')
  • modifyTier(tier => ...) // Same syntax as custom armor tier, see below

Valid armor tiers:

  • leather
  • chainmail
  • iron
  • gold
  • diamond
  • turtle
  • netherite

Valid group/creative tab IDs:

  • search
  • buildingBlocks
  • decorations
  • redstone
  • transportation
  • misc
  • food
  • tools
  • combat
  • brewing
Creating custom tool and armor tiers

All values are optional and by default are based on iron tier

onEvent('item.registry.tool_tiers', event => {
  event.add('tier_id', tier => {
    tier.uses = 250
    tier.speed = 6.0
    tier.attackDamageBonus = 2.0
    tier.level = 2
    tier.enchantmentValue = 14
    tier.repairIngredient = '#forge:ingots/iron'
  })
})
onEvent('item.registry.armor_tiers', event => {
  // Slot indicies are [FEET, LEGS, BODY, HEAD]
  event.add('tier_id', tier => {
    tier.durabilityMultiplier = 15 // Each slot will be multiplied with [13, 15, 16, 11]
    tier.slotProtections = [2, 5, 6, 2]
    tier.enchantmentValue = 9
    tier.equipSound = 'minecraft:item.armor.equip_iron'
    tier.repairIngredient = '#forge:ingots/iron'
    tier.toughness = 0.0 // diamond has 2.0, netherite 3.0
    tier.knockbackResistance = 0.0
  })
})