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Item Events

scripting
Item Events

FORMAT VERSION 1.21.70

Using the latest format version when creating custom items provides access to fresh features and improvements. The wiki aims to share up-to-date information about custom items, and currently targets format version 1.21.70.

Registering Custom Components ​

Item events trigger when certain conditions are met and can be "listened" to in custom components which are registered in scripts before the world is loaded.

Within each custom component, event handler functions (such as onBeforeDurabilityDamage) are listed to configure what you want to happen when each event is triggered.

This example prevents the item from taking durability damage when hitting an entity:

BP/scripts/unbreakable_component.js
js
import { world } from "@minecraft/server";

const ItemUnbreakableComponent = {
    onBeforeDurabilityDamage(event) {
        event.durabilityDamage = 0;
    },
};

world.beforeEvents.worldInitialize.subscribe(({ itemComponentRegistry }) => {
    itemComponentRegistry.registerCustomComponent("wiki:unbreakable", ItemUnbreakableComponent);
});

Applying Custom Components ​

To bind a custom component to a custom item, simply list them in the minecraft:custom_components component in your item JSON.

minecraft:item
json
"components": {
    "minecraft:custom_components": ["wiki:unbreakable"]
}

List of Events ​

Before Durability Damage ​

This event will be called when an item containing this component is hitting an entity and about to take durability damage.

Custom Component
js
onBeforeDurabilityDamage(event) {
    event.attackingEntity // The attacking entity.
    event.durabilityDamage // The damage applied to the item's durability when the event occurs.
    event.hitEntity // The entity being hit.
    event.itemStack // The item stack used to hit the entity.
}

Complete Use ​

DEPENDENCY

The complete use event requires the minecraft:use_modifiers component to be active on your item to trigger.

This event will be called when the use duration of the item containing this component is completed.

minecraft:item > components
json
"minecraft:use_modifiers": {
    "use_duration": 5
}
Custom Component
js
onCompleteUse(event) {
    event.itemStack // Returns the item stack that has completed charging.
    event.source // Returns the source entity that triggered this item event.
}

Consume ​

This event will be called when an item containing this component is eaten by an entity.

DEPENDENCIES

The complete use event requires the minecraft:use_modifiers and the minecraft:food component to be active on your item to trigger.

minecraft:item > components
json
"minecraft:food": {},
"minecraft:use_modifiers": {
    "use_duration": 5
}
Custom Component
js
onConsume(event) {
    event.itemStack // The item stack that was consumed.
    event.source // The source entity that consumed the item.
}

Hit Entity ​

This function will be called when an item containing this component is used to hit another entity.

Custom Component
js
onHitEntity(event) {
    event.attackingEntity // The attacking entity.
    event.hadEffect // Whether the hit landed or had any effect.
    event.hitEntity // The entity being hit.
    event.itemStack // The item stack used to hit the entity.
}

Mine Block ​

This function will be called when an item containing this component is used to mine a block.

Custom Component
js
onMineBlock(event) {
    event.block // The block impacted by this event.
    event.itemStack // The item stack used to mine the block.
    event.minedBlockPermutation // The block permutation that was mined.
    event.source // The entity that mined the block.
}

Use ​

This function will be called when an item containing this component is used by a player.

Custom Component
js
onUse(event) {
    event.itemStack // The item stack when the item was used.
    event.source // The player who used the item.
}

Use On ​

This function will be called when an item containing this component is used on a block.

Custom Component
js
onUseOn(event) {
    event.source // The entity that used the item on the block.
    event.usedOnBlockPermutation // The block permutation that the item was used on.
}

Contributors

Edit Item Events on GitHub

Text and image content on this page is licensed under the Creative Commons Attribution 4.0 International License

Code samples on this page are licensed under the MIT License