Class WorldBeforeEvents

A set of events that fire before an actual action occurs. In most cases, you can potentially cancel or modify the impending event. Note that in before events any APIs that modify gameplay state will not function and will throw an error. (e.g., dimension.spawnEntity)

Properties

chatSend effectAdd entityRemove explosion itemUse itemUseOn playerBreakBlock playerGameModeChange playerInteractWithBlock playerInteractWithEntity playerLeave playerPlaceBlock weatherChange worldInitialize

Properties

Readonly BetachatSend

chatSend: ChatSendBeforeEventSignal

Remarks

This event is triggered after a chat message has been broadcast or sent to players.

Example: subscribe.js

import { WeatherType, system, world } from "@minecraft/server";

world.beforeEvents.chatSend.subscribe((event) => {
    const { message, sender } = event;
    const { dimension } = sender;

    if (message === "!weather clear") {
        event.cancel = true;
        system.run(() => {
            dimension.setWeather(WeatherType.Clear);
        });
    }
});

ReadonlyeffectAdd

effectAdd: EffectAddBeforeEventSignal

Remarks

This event is triggered after an event has been added to an entity.

ReadonlyentityRemove

entityRemove: EntityRemoveBeforeEventSignal

Remarks

Fires before an entity is removed from the world (for example, unloaded or removed after being killed.)

Readonlyexplosion

explosion: ExplosionBeforeEventSignal

Remarks

This event is fired after an explosion occurs.

ReadonlyitemUse

itemUse: ItemUseBeforeEventSignal

Remarks

This event fires when an item is successfully used by a player.

ReadonlyitemUseOn

itemUseOn: ItemUseOnBeforeEventSignal

Remarks

This event fires when an item is used on a block by a player.

Example: subscribe.ts

import { world, Player, BlockPermutation } from "@minecraft/server";

// Subscribe to the itemUseOn event before it happens
world.beforeEvents.itemUseOn.subscribe((event) => {
    const { source, block, itemStack } = event;
    if (!(source instanceof Player)) return;

    source.sendMessage("You used " + itemStack.typeId + " on " + block.typeId);

    // If the item is a diamond, set the block to be a diamond block
    if (itemStack.typeId === "minecraft:diamond") {
        block.setPermutation(
            BlockPermutation.resolve("minecraft:diamond_block")
        );
    }
});

ReadonlyplayerBreakBlock

playerBreakBlock: PlayerBreakBlockBeforeEventSignal

Remarks

This event fires before a block is broken by a player.

ReadonlyplayerGameModeChange

playerGameModeChange: PlayerGameModeChangeBeforeEventSignal

Readonly BetaplayerInteractWithBlock

playerInteractWithBlock: PlayerInteractWithBlockBeforeEventSignal

Remarks

Fires before a player interacts with a block.

Readonly BetaplayerInteractWithEntity

playerInteractWithEntity: PlayerInteractWithEntityBeforeEventSignal

Remarks

Fires before a player interacts with an entity.

ReadonlyplayerLeave

playerLeave: PlayerLeaveBeforeEventSignal

Remarks

Fires when a player leaves the game.

Example: leavingMessage.ts

import { world } from "@minecraft/server";
world.beforeEvents.playerLeave.subscribe(({ player }) => {
    world.sendMessage(
        `[${new Date().toISOString()}]` + player.name + "left the server"
    );
});

Readonly BetaplayerPlaceBlock

playerPlaceBlock: PlayerPlaceBlockBeforeEventSignal

Remarks

This event fires before a block is placed by a player.

ReadonlyweatherChange

weatherChange: WeatherChangeBeforeEventSignal

Readonly BetaworldInitialize

worldInitialize: WorldInitializeBeforeEventSignal

Remarks

This event fires immediately when the script environment is initialized on a World. Not all script functionality may be available. For guaranteed access to world state, use the world initialize after event.

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