# Item Modification

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

```JavaScript
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)
- }