Java Edition 1.21.4 Pre-Release 1

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1.21.4 Pre-Release 1 (known as 1.21.4-pre1 in the launcher) is the first pre-release for Java Edition 1.21.4, released on November 20, 2024,^[1] which fixes bugs.

Items model definitions

• Boolean property
  • Added minecraft:view_entity
    • When not spectating, returns true if context entity is the local player entity, i.e. one controlled by client.
    • When spectating, returns true if context entity is the spectated entity.
    • If context entity is not present, returns false.
    • No fields.

• Item model type
  • Added minecraft:empty
    • Does not render anything.
    • No fields.

• Property types
  • Added minecraft:context_dimension
    • Returns the ID of the dimension in context, if any.
    • No fields.
    • Values: namespaced dimension ID (like minecraft:overworld).

• Tint source type
  • Added minecraft:team
    • Returns team color of context entity, if any.
    • Fields:
      • default - RGB value to return when there is no context entity, entity is not in a team or team has no color.

• Water Breathing and Conduit Power effects now increase the oxygen while underwater instead of only preventing it from decreasing.

Spawn eggs

• Similar to block items, spawn eggs for entities that could execute operator-only commands now have a warning in tooltip.

Items model definitions

• A new field has been added to the client-side item info format (i.e. files in /assets/*/items/*.json).
  • hand_animation_on_swap - boolean field describing if down-and-up animation should be played in first-person view when item stack is changed (either type, count or components)
    • Default: true
    • Only value from new item is taken into account.
    • Does not control "pop" animation in GUI when item is picked or changes count.

• Numeric property types
  • minecraft:compass
    • Added value none to field target which always returns an invalid target.

• • minecraft:time
    • Removed field natural_only.
    • Added field source - time source, possible values:
      • daytime - time of day
      • moon_phase - moon phase
      • random - random value

• Property types
  • minecraft:holder_type was renamed to minecraft:context_entity_type.

• Special model types
  • minecraft:head
    • Added field animation - float controlling head animation (like Piglin ears or Ender Dragon jaw)
      • Default: 0.0

Fonts

• GNU Unifont
  • Updated to version 16.0.01.

Resource pack

• The pack format version is now 46.

16 issues fixed

From released versions before 1.21

• MC-128225 – '/data remove' can't remove the NBT "CustomName".
• MC-138100 – /data remove doesn't work for the Jukebox's RecordItem tag.
• MC-179815 – Data command doesn't remove leash from a mob.
• MC-207605 – /data remove entity [tamed wolf] Owner does not remove ownership of the wolf.
• MC-248264 – /data remove can't remove ArmorItems.
• MC-265788 – The "Start free Snapshot Realm" element can be selected or remain selected causing its tooltip to erroneously be visible when other interfaces are open.

From 1.21.3

• MC-278257 – Oxygen bar animation can be interrupted by applying water breathing.

From the 1.21.4 development versions

• MC-278134 – The TAB key cannot be used to select messages to report after clicking the "X message(s) hidden" element.
• MC-278193 – Baby piglins can't decide between crossbows and golden items.
• MC-278390 – Opening shulkers no longer trigger tripwire or pressure plates.

From the previous development version

• MC-278290 – Using items while swimming or walking underwater doesn't slow the player down.
• MC-278300 – Creakings struck by lightning show visual fire.
• MC-278302 – Bundle always takes out first item and ignores selected item.
• MC-278311 – Respawned creakings from creaking hearts don't persist when the world is reloaded.
• MC-278312 – Creakings spawned from a creaking heart can be name-tagged once again.
• MC-278387 – Creaking respawns when going to the nether and back.