Custom Items

The custom item event is a startup event.

Custom items are created in a startup script. They cannot be reloaded without restarting the game. The event is not cancellable.

// Listen to item registry event
StartupEvents.registry('item', e => {
  // 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
  e.create('test_item')
  
  // If you want to specify a different texture location you can do that too, like this:
  e.create('test_item_1').texture('mobbo:item/lava') // This texture would be located at kubejs/assets/mobbo/textures/item/lava.png
  
  // You can chain builder methods as much as you like
  e.create('test_item_2').maxStackSize(16).glow(true)
  
  // You can specify item type as 2nd argument in create(), some types have different available methods
  e.create('custom_sword', 'sword').tier('diamond').attackDamageBaseline(10.0)
})

Valid item types:

• basic (this is the default)
• sword
• pickaxe
• axe
• shovel
  
• shears
• hoe
• helmet
• chestplate
• leggings
• boots

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

• maxStackSize(size)
• displayName(name)
• unstackable()
• maxDamage(damage) This is the item's durability, not actual weapon damage.
• burnTime(ticks)
• containerItem(item_id)
• rarity('rarity')
• tool(type, level)
• glow(true/false)
• tooltip(text...)
• group('group_id')
• color(index, colorHex)
• texture(customTextureLocation)
• parentModel(customParentModelLocation)
• food(foodBuilder => ...) For full syntax see below

Methods available if you use a tool type ('sword', 'pickaxe', 'axe', 'shovel' or 'hoe'):

• tier('toolTier')
• modifyTier(tier => ...) Same syntax as custom tool tier, see Custom Tiers
• 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)

Default available tool tiers:

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

Methods available if you use an armour type ('helmet', 'chestplate', 'leggings' or 'boots'):

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

Default available armor tiers:

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

Vanilla group/creative tab IDs:

• search
• buildingBlocks
• decorations
• redstone
• transportation
• misc
• food
• tools
• combat
• brewing

Custom Foods

StartupEvents.registry('item', event => {
	event.create('magic_steak').food(food => {
		food
    		.hunger(6)
    		.saturation(6)//This value does not directly translate to saturation points gained
      		//The real value can be assumed to be:
      		//min(hunger * saturation * 2 + saturation, foodAmountAfterEating)
      		.effect('speed', 600, 0, 1)
      		.removeEffect('poison')
      		.alwaysEdible()//Like golden apples
      		.fastToEat()//Like dried kelp
      		.meat()//Dogs are willing to eat it
      		.eaten(ctx => {//runs code upon consumption
        		ctx.player.tell(Text.gold('Yummy Yummy!'))
          		//If you want to modify this code then you need to restart the game.
          		//However, if you make this code call a global startup function
          		//and place the function *outside* of an event handler
          		//then you may use the command:
          		//  /kubejs reload startup_scripts
          		//to reload the function instantly.
          		//See example below
        	})
	})
  
  event.create('magicer_steak').unstackable().food(food => {
    food
      .hunger(7)
      .saturation(7)
      // This references the function below instead of having code directly, so it is reloadable! 
      .eaten(ctx => global.myAwesomeReloadableFunction(ctx))
  })
})

global.myAwesomeReloadableFunction = ctx => {
  ctx.player.tell('Hello there!')
  ctx.player.tell(Text.of('Change me then reload with ').append(Text.red('/kubejs reload startup_scripts')).append(' to see your changes!'))
}