scripts failed to read components of mobs

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I can’t edit my report so I have to claim it here. The code in the screenshot is enough for testing the issue, only needs to correctly add it to a script (.js file) in a behavior pack.

And I noticed there are custom fields in the code, so I’ll provide improved code here:

import { world } from "@minecraft/server";
//subscribe an entity hit entity event
world.afterEvents.entityHitEntity.subscribe(t => {
//define entities in the event
	var entity = t.hitEntity
	var attack = t.damagingEntity
//use different methods to get items held by different types of entities
	if (attack.typeId == "minecraft:player") {
		var weapon = attack.getComponent("inventory")
			.container.getItem(attack.selectedSlotIndex)
	}
	else {
		var weapon = attack.getComponent("equippable")
			.getEquipment("mainhand")
	}
//when the hitting entity holding wooden sword, affect hit entity poison
	if (weapon.typeId == "minecraft:wooden_sword"){
		entity.runCommand(`effect @s fatal_poison 5 1`);
	}
//when the hitting entity holding iron sword, affect hit entity slowness. especially when hit entity is player, affect it blindness
	if (weapon.typeId == "minecraft:iron_sword"){
		if (entity.typeId == "minecraft:player") {entity.runCommand(`effect @s blindness 120 0`);}
		else {entity.runCommand(`effect @s slowness 120 1`);}
	}
});

when you copy the code and successfully set up a pack, apply it to a world, then we can test.

Steps to Reproduce:

1. Summon an entity, say a zombie, holding a wooden sword or a iron sword(actually whatever it’s holding or even nothing it’s holding, the error post will be shown)

2. Summon another entity, say a villager or yourself in survival mode, and let the entity hit this entity

Observed Results:
the error posts and no effect is applied to hit entity

Expected Results:
the effect is applied and no error posts

Please attach the pack to this report.

It may help.

The thrown error seemed show that any mobs(of cause player isn’t a mob) cannot be defined as “damagingEntity”

The original description of the report was inaccurate. If you replace

The error post shows that a mob hitting other entity and its component "equippable" wass undefined(not readable). And actually its component "inventory" was not readable, too. So I suppose mobs' components that contains item stack were not readable.

with

The thrown error seemed show that any mobs(of cause player isn’t a mob) cannot be defined as “damagingEntity”

I would be more clear.