Java Edition 24w10a

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 "label": "Release date"
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 "field": "(link to Snapshot article, displayed as Snapshot)",
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 "field": " <span style=\"font-size:smaller\"><abbr title=\"decimal\">dec</abbr>: </span>1073742003<br /> <span style=\"font-size:smaller\"><abbr title=\"hexadecimal\">hex</abbr>: </span>400000B3",
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 "field": "<span class=\"plainlinks\">[https://en.wikipedia.org/wiki/Java_version_history#Java_SE_17_.28LTS.29 Java SE 17]</span>",
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 "footer": "<table style=\"margin: auto; word-break: break-word;\">\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\" >[[Java Edition 1.20.4|<span style=\"margin-right:-0.35em\">◄</span>◄  1.20.4]]</td>\n<td style=\"padding: 0.4em\">'''[[Java Edition 1.20.5|1.20.5]]'''</td>\n<td style=\"padding: 0.4em\" >[[Java Edition 1.20.6| 1.20.6 <span style=\"margin-right:-0.35em\">►</span>►]]</td>\n</tr>\n<tr style=\"background: inherit;\">\n<td style=\"padding: 0.4em\">\n[[Java Edition 24w09a|◄  24w09a]]\n</td>\n<td style=\"padding: 0.4em\">''' 24w10a'''</td>\n<td style=\"padding: 0.4em\">\n[[Java Edition 24w11a| 24w11a ►]]\n</td>\n</tr>\n</table>"
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24w10a is the eleventh snapshot for Java Edition 1.20.5, released on March 6, 2024,^[1] which adds eight new wolf variants found in different biomes, simplified forms for item stack components, updated inventory slot names, allows item components in recipes, and fixes bugs.

Wolf

• Added variants of wolves.
  • 👁 Image
    The familiar pale wolf now spawns in taigas.
  • 👁 Image
    The rusty wolf spawns in sparse jungles.
  • 👁 Image
    The spotted wolf spawns in savanna plateaus.
  • 👁 Image
    The black wolf spawns in old growth pine taiga.
  • 👁 Image
    The striped wolf spawns in wooded badlands.
  • 👁 Image
    The snowy wolf spawns in groves.
  • 👁 Image
    The ashen wolf spawns in snowy taigas.
  • 👁 Image
    The woods wolf spawns in forests.
  • 👁 Image
    The chestnut wolf spawns in old growth spruce taiga.^[2]
  • Wolves spawned with a spawn egg spawn as the variant associated with the biome the egg is used in. They default to pale wolf in any other biome.

Entity predicate

• Added entity sub-predicate slots, used to check single or multiple slots on any entity.
  • For slot ranges, only one slot needs to match for whole entry to pass.
  • The field contains a map of slot names (same as ones used in item commands) to item predicate.
  • Example:

{
"condition":"minecraft:entity_properties",
"entity":"this",
"predicate":{
"slots":{
"container.*":{
"items":"dirt"
}
}
}
}

Inventory

• Added new slot names:
  • container.*: contains container.0 to container.53.
  • hotbar.*: contains hotbar.0 to hotbar.8.
  • inventory.*: contains inventory.0 to inventory.26.
  • enderchest.*: contains enderchest.0 to enderchest.26.
  • villager.*: contains villager.0 to villager.7.
  • horse.*: contains horse.0 to horse.14.
  • weapon.*: contains weapon.mainhand and weapon.offhand.
  • armor.*: contains armor.head, armor.chest, armor.legs, armor.feed, and armor.body.
  • player.cursor: item held by player on screen except Creative mode^[3].
  • player.crafting.0, player.crafting.1, player.crafting.2, player.crafting.3, and player.crafting.*: player's crafting slots.

Grindstone

• No longer accepts items with [NBT Compound / JSON Object] unbreakable component that do not have an enchantment.
  • If the item above has durability, it can be repaired with an unbreakable item and the output doesn't inherit [NBT Compound / JSON Object] unbreakable component. If the order is swapped, the item is neither repaired nor disenchanted. If the only item in the slots is an enchanted unbreakable item, it is disenchanted and [NBT Compound / JSON Object] unbreakable component remains.
• No longer disenchants two enchanted books at the same time.

Player head

• Now stores item name in custom_name tag.
• Tags SkullOwner and ExtraType are replaced with profile to keep a consistent format with the item component form.

General

• Now count is stored again when there is only 1 item.
  • Defaults to 1 if this field is invalid.

Wolf

• Now spawns on coarse dirt and podzol blocks.
• Now spawns in sparse jungle, savanna plateau, and wooded badlands biomes.

Grove

• Rabbits, wolves, and foxes are now the only passive mobs spawning in the grove biome.

/execute

• if and unless sub-commands can now use items to compare or count items.
  • execute if|unless items <source> <slots> <item_predicate>
    • <source> is the same one as used in /item.
      • e.g. block <x> <y> <z> or entity <target> (selector can return multiple entities)
    • <slots> can accept single slot (like container.0) or a range (like container.*)
    • <item_predicate> is the same as item predicate in /clear command.
• If used alone, it returns total number of items in stacks that match predicates.

Data packs

• The data pack version is now 34.
• Banner patterns are now be loaded into the registry from data/<namespace>/banner_pattern/<id>

Item stack components

• [String][NBT Compound / JSON Object] profile no longer requires [String] name field.
• Some additional item stack components now support alternative, simple definitions:
  • [NBT Compound / JSON Object] profile can now be defined as [String] profile for a player name. e.g. profile="jeb_".
  • [NBT Compound / JSON Object] dyed_color can now be defined as [Int] dyed_color. e.g. dyed_color=16711680.
  • [NBT Compound / JSON Object] attribute_modifiers can now be defined as [NBT List / JSON Array] attribute_modifiers. e.g. attribute_modifiers=[{type:'generic.scale',uuid:[1,2,3,4],name:'Big!',amount:1.0,operation:'add_multiplied_base'}].
  • [NBT Compound / JSON Object] potion_contents can now be defined as a single potion id [String] potion_contents. e.g. potion_contents="invisibility".
  • [NBT Compound / JSON Object] enchantments and [NBT Compound / JSON Object] stored_enchantments can be defined as an inline map of enchantment id to level: enchantments={sharpness:1}.
  • When stored, they still are in full formats.
• [NBT Compound / JSON Object] container now applies to all containers instead of only shulker boxes.
• [NBT Compound / JSON Object] lodestone_target is renamed to [NBT Compound / JSON Object] lodestone_tracker.
  • [Int Array] pos and [String] dimension are now moved to [NBT Compound / JSON Object] target (optional).
  • When [NBT Compound / JSON Object] target does not exist, the compass spins.
• [NBT List / JSON Array] lore and [NBT List / JSON Array] fireworks/explosions now allows 256 entities.
• Items with [NBT Compound / JSON Object] can_break and [NBT Compound / JSON Object] can_place_on can now be stacked properly.

Recipe

• Can now specify item component.
  • [NBT Compound / JSON Object] result field for crafting_shaped, crafting_shapeless, stonecutting, and smithing_transform now accepts [NBT Compound / JSON Object] components.
  • [String] result field for smelting, blasting, smoking, and campfire_cooking recipes are now an item stack without count. That is, [String] id must be specified and [NBT Compound / JSON Object] components is now accepted.

Tags

• Added coarse_dirt and podzol to #wolves_spawnable_on.

Tooltip

• No longer appears when hovering outside the containing element.

Vault

• The left pixels in the disabled vault have been updated to match the other vault textures.

31 issues fixed

From released versions before 1.20

• MC-131636 – One additional character at the end is allowed in JSON text components.
• MC-140397 – When combining two enchanted unbreakable items, the result will be two stacked items.
• MC-157133 – Enchanted books with curses can be stacked using a grindstone.
• MC-167324 – Multiple UI buttons can be highlighted at the same time.
• MC-174496 – Player heads lose their name after being placed.
• MC-187746 – Game rule buttons on "Edit game rules" screen are highlighted despite being covered.
• MC-217084 – Player head NBT "ExtraType" is no longer saved but doesn't use DataFixerUpper upgrade path.

From the 1.20.5 development versions

• MC-268392 – Setting gravity attribute to 0.0 kicks player for flying.
• MC-268462 – Saturation suspicious stew now grants 7 seconds of effect instead of 7 ticks.

From the previous development version

• MC-268800 – All tools have 4 attack damage, and 1.6 attack speed.
• MC-268801 – Shulker boxes in saved hotbars inconsistently update to item components.
• MC-268813 – Crash when spawning item with can_break/can_place_on component containing unknown/invalid tag.
• MC-268824 – Disenchanted books from grindstone don't stack with books that were in the inventory.
• MC-268830 – Effect particles appear when specifying no particles using /effect command.
• MC-268834 – Vault texture is inconsistent.
• MC-268842 – Crash when saving world with painting/on wandering trader spawn/when pressing escape.
• MC-268845 – Items with can_break/can_place_on components update every time the inventory is changed in Creative mode.
• MC-268850 – Attribute modifier: Not updated when switching items in hotbar.
• MC-268851 – Crossbows don't make a firing sound.
• MC-268853 – Unable to load paintings for any variants.
• MC-268856 – Loading shulker box/bundle with a single 'invalid' item in it renders the whole component invalid.
• MC-268864 – An item modifier with a duplicate item stack component prevents the entire data pack from (re)loading, rather than ignoring that one specific item modifier.
• MC-268879 – Having a high damage value breaks and crashes the game.
• MC-268897 – Cannot select entities who have any item stack with the count being 1.
• MC-268904 – Suspicious stew not giving effects.
• MC-268921 – Arrows lose particles after unloading world.
• MC-268971 – Lodestone compass stops being a lodestone compass after breaking its tracked lodestone.
• MC-269005 – Player heads from previous versions cause game crash and/or are converted incorrectly.
• MC-269062 – Bundles with "Bundle Contents" component removed return after right clicking.
• MC-269066 – Item modifier cannot remove `custom_name`.
• MC-269091 – AttributeModifiers NBT with missing fields is not upgraded correctly to components.