For AI agents: the complete documentation index is available at /llms.txt, the full documentation bundle is available at /llms-full.txt, and this page is available as Markdown at /server/classes/EntitySpawnAfterEventSignal.md.

    Class: EntitySpawnAfterEventSignal

    event entity

    Beta

    Registers a script-based event handler for handling what happens when an entity spawns.

    Methods

    subscribe()

    subscribe(callback): (arg0) => void

    World Mutation Early Execution Beta

    Parameters

    callback

    (arg0) => void

    Function that handles the spawn event.

    Returns

    (arg0) => void

    Remarks

    Method to register an event handler for what happens when an entity spawns.

    Example

    logEntitySpawnEvent.ts

    import { world, system, EntitySpawnAfterEvent, DimensionLocation } from '@minecraft/server';
import { Vector3Utils } from '@minecraft/math';

function logEntitySpawnEvent(log: (message: string, status?: number) => void, targetLocation: DimensionLocation) {
  // register a new function that is called when a new entity is created.
  world.afterEvents.entitySpawn.subscribe((entityEvent: EntitySpawnAfterEvent) => {
    if (entityEvent && entityEvent.entity) {
      log(`New entity of type ${entityEvent.entity.typeId} created!`, 1);
    } else {
      log(`The entity event did not work as expected.`, -1);
    }
  });

  system.runTimeout(() => {
    targetLocation.dimension.spawnEntity(
      'minecraft:horse<minecraft:ageable_grow_up>',
      Vector3Utils.add(targetLocation, { x: 0, y: 1, z: 0 })
    );
  }, 20);
}

    unsubscribe()

    unsubscribe(callback): void

    World Mutation Early Execution Beta

    Parameters

    callback

    (arg0) => void

    Original function that was passed into the subscribe event, that is to be unregistered.

    Returns

    void

    Remarks

    Unregisters a method that was previously subscribed to the subscription event.

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    源码