Tagging Attacked entities

[rare ocean]

I need to tag an entity when it is hit with a specific item. I have some custom items here that needs those functionality.

[radiant folio]

Your best bet would be to use a script. I don't know the exact details, but you would most likely need to use world.afterEvents.entityHitEntity (docs here: https://learn.microsoft.com/en-us/minecraft/creator/scriptapi/minecraft/server/entityhitentityafterevent?view=minecraft-bedrock-stable). In there, you can check if the attacker is holding your item, and then add the tag to the hit entity if the attacker is

[exotic burrow]

yeah you'll have a easier time using scripts for it than using alternative methods which are usually very bulky in comparison

[rare ocean]

I do not know how to begin scripting I am yet to adventure that path but, can you provide me any beginner stuff that relates to that?

Like sample codes

also just to clarify
MCPE uses java script right?
not java