Built-in Data Maps

NeoForge provides a few data maps that mostly replace hardcoded in-code vanilla maps.
These data maps can be found in NeoForgeDataMaps, and are always optional to ensure compatibility with vanilla clients.

neoforge:compostables

NeoForge provides a data map that allows configuring composter values, as a replacement for ComposterBlock#COMPOSTABLES (which is now ignored).
This data map is located at neoforge/data_maps/item/compostables.json and its objects have the following structure:

{
    // A 0 to 1 (inclusive) float representing the chance that the item will update the level of the composter
    "chance": 1
}

Example:

{
    "values": {
        // Give acacia logs a 50% chance that they will fill a composter
        "minecraft:acacia_log": {
            "chance": 0.5
        }
    }
}

neoforge:furnace_fuels

NeoForge provides a data map that allows configuring item burn times.
This data map is located at neoforge/data_maps/item/furnace_fuels.json and its objects have the following structure:

{
    // A positive integer representing the item's burn time, in ticks
    "burn_time": 1000
}

Example:

{
    "values": {
        // Give anvils a 2 seconds burn time
        "minecraft:anvil": {
            "burn_time": 40
        }
    }
}

note

Other in-code methods like IItemExtension#getBurnTime will take priority over the data map, so it is recommended that you use the data map for simple, static burn times even in your mod so that users can configure them.

warning

Vanilla adds a burn time to logs and planks in the minecraft:logs and minecraft:planks tag. However, those tags also contain Nether wood, so a removal for elements in #minecraft:non_flammable_wood is added.
However, the removal does not affect any values added by other packs or mods, so if you want to change the values for the wood tags you will need to add a removal for the non flammable tag yourself.

neoforge:parrot_imitations

NeoForge provides a data map that allows configuring the sounds produced by parrots when they want to imitate a mob, as a replacement for Parrot#MOB_SOUND_MAP (which is now ignored).
This data map is located at neoforge/data_maps/entity_type/parrot_imitations.json and its objects have the following structure:

{
    // The ID of the sound that parrots will produce when imitating the mob
    "sound": "minecraft:entity.parrot.imitate.creeper"
}

Example:

{
    "values": {
        // Make parrots produce the ambient cave sound when imitating allays
        "minecraft:allay": {
            "sound": "minecraft:ambient.cave"
        }
    }
}

neoforge:raid_hero_gifts

NeoForge provides a data map that allows configuring the gift that a villager with a certain VillagerProfession may gift you if you stop the raid, as a replacement for GiveGiftToHero#GIFTS (which is now ignored) This data map is located at neoforge/data_maps/villager_profession/raid_hero_gifts.json and its objects have the following structure:

{
    "values": {
         "minecraft:armorer": {
            // Make armorers give the raid hero the armorer gift loot table
            "loot_table": "minecraft:gameplay/hero_of_the_village/armorer_gift"
        },
    }
}

neoforge:vibration_frequencies

NeoForge provides a data map that allows configuring the shulker vibration frequencies emitted by game events, as a replacement for VibrationSystem#VIBRATION_FREQUENCY_FOR_EVENT (which is now ignored).
This data map is located at neoforge/data_maps/game_event/vibration_frequencies.json and its objects have the following structure:

{
    // An integer between 1 and 15 (inclusive) that indicates the vibration frequency of the event
    "frequency": 2
}

Example:

{
    "values": {
        // Make the splash in water game event vibrate on the second frequency
        "minecraft:splash": {
            "frequency": 2
        }
    }
}