Block Modification

item.modification event is a startup script event that allows you to change properties of existing items

onEvent('item.modification', event => {
  event.modify('minecraft:ender_pearl', item => {
    item.maxStackSize = 64
    item.fireResistant = true
  })
})

All available properties:

• int maxStackSize
• int maxDamage
• int burnTime
• String craftingReminder
• boolean fireResistant
• Rarity rarity
• tier = tierOptions => {
  • int uses
  • float speed
  • float attackDamageBonus
  • int level
  • int enchantmentValue
  • Ingredient repairIngredient
• }
• foodProperties = food => { // note: uses functions instead of a = b
  • hunger(int)
  • saturation(float)
  • meat(boolean)
  • alwaysEdible(boolean)
  • fastToEat(boolean)
  • effect(String effectId, int duration, int amplifier, float probability)
  • removeEffect(String effectId)
• }