Data Components

Data components are key-value pairs attached to item stacks that define their behaviour and properties. Minecraft has a large set of built-in components (rarity, enchantments, food, etc.). A full list can be found on the Minecraft wiki.

Components are set on an item via the components field inside properties:

"properties": {
  "components": {
    "minecraft:rarity": "epic",
    "palladium:openable": true
  }
}

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Palladium Components

Palladium adds the following item components that can be used in addonpack item definitions.

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palladium:render_layers

Attaches render layers to the item on a per-slot basis. When the item is worn or held in the specified slot, the listed render layers are applied to the player.

The value is an object mapping slot keys to one or more render layer IDs. A single ID can be given as a plain string; multiple IDs use a JSON array.

Slot keys:

Key	Description
mainhand	Held in the main hand
offhand	Held in the off hand
head	Worn in the helmet slot
chest	Worn in the chestplate slot
legs	Worn in the leggings slot
feet	Worn in the boots slot
body	Worn in the body slot
any / *	Active in any slot
curios:<slot>	A specific Curios slot (e.g. curios:hat)

"palladium:render_layers": {
  "head": "mypack:iron_man_suit",
  "curios:hat": ["mypack:iron_man_suit", "mypack:glow_overlay"]
}

---

palladium:powers

Grants powers to the player on a per-slot basis. When the item is worn or held in the specified slot, the listed powers are granted.

Follows the same slot key and value format as palladium:render_layers.

"palladium:powers": {
  "head": "mypack:flight",
  "curios:hat": "mypack:flight"
}

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palladium:power_dampening

Suppresses (dampens) specific powers on a per-slot basis. When the item is worn or held in the specified slot, the matched powers are prevented from activating.

The value is an object mapping slot keys to a HolderSet of powers. A HolderSet must be homogeneous: it can be either a list of direct IDs or a single tag, but not a mix of both:

"palladium:power_dampening": {
  "*": "#palladium:is_magical"
}

"palladium:power_dampening": {
  "chest": ["mypack:flight", "mypack:super_strength"]
}

To combine individual IDs and tags in a single slot, use the NeoForge compound HolderSet via "type": "neoforge:or":

"palladium:power_dampening": {
  "chest": {
    "type": "neoforge:or",
    "values": [
      "mypack:flight",
      "#palladium:is_magical"
    ]
  }
}

---

palladium:openable

Gives the item an open/close state, used for animated wearables such as helmets with a visor. The open state is typically toggled by other systems (e.g. abilities or keybinds).

Simple forms:

"palladium:openable": true

Enables the open/close state with no animation timer and no sounds.

"palladium:openable": 10

Enables the open/close state with an animation timer of 10 ticks. The timer counts up to the given value when opening and back down to 0 when closing, which can be used to drive animations.

Full object form:

Field	Type	Default	Description
enabled	Boolean	true	Whether the open/close state is active.
time	Integer	0	Duration in ticks for the open/close animation. 0 means no timer.
opening_sound	Identifier	—	Sound event to play when the item is opened. Optional.
closing_sound	Identifier	—	Sound event to play when the item is closed. Optional.

"palladium:openable": {
  "enabled": true,
  "time": 10,
  "opening_sound": "mypack:helmet_open",
  "closing_sound": "mypack:helmet_close"
}