How can I add hearts to a player after they kill a mob or hostile mob?

[tropic canopy]

I have a mod that has an effect that hurts you when you attack mobs, I want to use this effect but in reverse add hearts when killing mobs

[quiet dove]

Once your ticket has been resolved, please close it with </ticket close:1054771505520717835> command!

[drowsy prawn]

you can do sth like this to manipulate maxhealth
#1360331556102864987 message

[ocean bison]

➤ (🔔👍) Nat

[➤](#1360331556102864987 message)

ItemEvents.foodEaten(event => {
    if (event.item.id === 'kubejs:fruit_of_eternal_life') {
        if (event.player) {
            event.player.maxHealth += 2;
        }
    }
});

vomiter quoted

[tropic canopy]

will this heal or grant extra hearts?

[drowsy prawn]

or if you mean heal instead, there's also a player.heal method

And you can get the player causing entity death in EntityEvents.death with sth like
let killer = event.source?.player

the killer might be null or undefined if the death is not caused by a player

[tropic canopy]

will this go in startup script

[drowsy prawn]

it's server one

[tropic canopy]

so it didn't crash my game but didn't heal me either when equipped

[ocean bison]

Paste version of leeching.js from @tropic canopy

[paper barn]

try debugging with a console.log() inside the if

see if it triggers

[tropic canopy]

not sure exactly how to do that

[drowsy prawn]

it should be .heal(6)

[tropic canopy]

oh thank you, unfortunately it still isn't healing me when killing a mob

[drowsy prawn]

how does the log say

oh wait

it shouldn't be event.player here

there should be error about player being undefined

change the line 02 to killer.nbt

line 07 to killer.heal

insert one line
if(!killer) return; between the current line02 and line03.

[tropic canopy]

Like this

[ocean bison]

Paste version of leeching.js from @tropic canopy

[drowsy prawn]

not right place to insert the line.
The null check is to prevent errors when an entity dies to things other than a player

but i think it should heal now

[tropic canopy]

i couldn't get it to work but I think I see where I placed it wrong, atleast I hope so, I'll work on this a bit more tomorrow its extremely late where Im at

[ocean bison]

Paste version of leeching.js from @tropic canopy

[drowsy prawn]

EntityEvents.death(event => {
    let killer = event.source?.player
    if(!killer) return;
    let curios = killer.nbt.ForgeCaps['curios:inventory'];
    let hasLeechingAmulet = curios.toString().contains("kubejs:leeching_amulet");
    if (!hasLeechingAmulet) return;
    killer.heal(6)
})

[tropic canopy]

oh ok i see, thank you for helping out, hopefully I can use this same formula to add a item drop chance for other amulets im currently working on