Packs and scripting

Script events

Subscribe with world.afterEvents.<name>.subscribe(callback), and remove with unsubscribe.

afterEvents

Group	Events
Players	`playerSpawn`, `playerJoin`, `playerLeave`, `playerHotbarSelectedSlotChange`, `playerInventoryItemChange`
Blocks	`playerBreakBlock`, `playerPlaceBlock`, `playerInteractWithBlock`
Entities	`entitySpawn`, `entityRemove`, `entityLoad`, `entityHurt`, `entityDie`, `entityHitBlock`, `entityHitEntity`, `entityItemDrop`
Projectiles	`projectileHitBlock`, `projectileHitEntity`
Other	`chatSend`, `itemUse`, `worldLoad`

beforeEvents

Set event.cancel = true to stop the action.

Event	Use
`playerBreakBlock`	Before a block breaks
`chatSend`	Before a chat message
`playerInteractWithBlock`, `playerInteractWithEntity`	Before an interaction
`itemUse`, `itemUseOn`	Before an item is used
`entityHurt`	Before damage
`effectAdd`	Before an effect
`worldInitialize`	Gives `itemComponentRegistry` and `blockComponentRegistry`

import { world } from "@minecraft/server";

world.beforeEvents.chatSend.subscribe((event) => {
  if (event.message.includes("badword")) event.cancel = true;
});