世界修改 早期执行Function that handles the spawn event.
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);
}
世界修改 早期执行Original function that was passed into the subscribe event, that is to be unregistered.
Registers a script-based event handler for handling what happens when an entity spawns.