BLOCKS DOCUMENTATION
Version: 1.17.40.6

Index

Blocks

Block Components

Name Type Default Value Description
minecraft:block_light_absorption Integer 0 The amount of light this block will absorb.
minecraft:block_light_emission Decimal 0.0 The amount of light this block will emit in a range [0.0, 1.0].
minecraft:breakonpush Boolean When pushed by a piston the block breaks
minecraft:breathability Enumerator solid Property describing the breathability of this block and whether it is treated as a solid or as air.
minecraft:creative_category String Specifies the creative group for the block.
minecraft:destroy_time Decimal 0.0 Sets the destroy time property for the block. Greater numbers result in greater mining times. Time is measured in seconds with base equipment.
minecraft:display_name String Specifies the language file key that maps to what text will be displayed when you hover over the block.
Experimental toggles required: Holiday Creator Features
minecraft:entity_collision Boolean false Can only be set to false, it disables the collision of the block with entities
Name Type Default Value Description
origin Array [-8.0, 0.0, -8.0] Minimal position Bounds of the collision box
size Array [16.0, 16.0, 16.0] Size of each side of the box of the component
minecraft:explosion_resistance Decimal 0.0 Sets the explosion resistance for this block.
minecraft:flammable JSON Object Describes the flammable properties for this block.
Name Type Default Value Description
burn_odds Integer 0 How likely the block will be destroyed by flames when on fire. Value must be greater than or equal to 0.
flame_odds Integer 0 How likely the block will catch flame when next to a fire. Value must be greater than or equal to 0.
minecraft:friction Decimal 0.1 Property describing the friction for this block. Friction effects an entities movements when it walks on the block.
minecraft:geometry String The geometry description identifier to use, this identifier must match an existing geometry identifier in any of the currently loaded resource packs.
Experimental toggles required: Holiday Creator Features
minecraft:immovable Boolean An Immovable block cannot be pushed by pistons
minecraft:loot String The path to the loot table, relative to the behavior pack.
minecraft:map_color String A color represented as a hex value. This will be the color rendered to a map.
minecraft:material_instances JSON Object Maps face or material_instance names in a geometry file to an actual material instance. Material instance can either be a full material instance or a name to another already defined instance
minecraft:onlypistonpush Boolean Blocks with those components won't stick to stickyPistons
minecraft:part_visibility JSON Object Maps bone names in a geometry file to a condition that turns their rendering on/off. The condition should be a Molang query that uses block properties to determine true/falseSupported queries include 'has_block_property', 'block_property', and other queries that can evaluate without knowledge of the block's in-game positional or player affected data.
Experimental toggles required: Upcoming Creator Features
minecraft:pick_collision Boolean false Can only be set to false, it disables the collision of the block with entities
Name Type Default Value Description
origin Array [-8.0, 0.0, -8.0] Minimal position Bounds of the collision box
size Array [16.0, 16.0, 16.0] Size of each side of the box of the component

minecraft:placement_filter JSON Object Sets rules for under what conditions the block can be placed/survive

conditions

List of conditions where the block can be placed/survive

Name Type Default Value Description
allowed_faces Array List of any of the following strings: up, down, north, south, east, west, side, all
block_filter Array List of blocks (can use tags to specify them) that this block can be placed against in the allowed_faces direction

minecraft:preventsjumping Boolean this component makes it so actors can't jump when walking on this block
minecraft:random_ticking JSON Object Describes the component that will trigger an even at a regular interval between two values
Name Type Default Value Description
Trigger on_tick
Name Type Default Value Description
condition String 1 The condition of event to be executed on the block.
event String set_block_property The type of event executed on the block.
range Array [10, 10] The Range between which the component will trigger his event.
target String self The target of event executed on the block.
minecraft:rotation Vector [a, b, c] rotation[0, 0, 0] This is the block's rotation around the center of the cube in degrees. The rotation order is x-y-z.
minecraft:ticking JSON Object Describes the component that will trigger an even at a regular interval between two values
Name Type Default Value Description
Trigger on_tick
Name Type Default Value Description
condition String 1 The condition of event to be executed on the block.
event String set_block_property The type of event executed on the block.
range Array [10, 10] The Range between which the component will trigger his event.
target String self The target of event executed on the block.
looping Boolean true Does the event loop
range Array [10, 10] The Range between which the component will trigger his event.
minecraft:unit_cube JSON Object Specifies that a unit cube is to be used with tessellation.
Experimental toggles required: Holiday Creator Features
minecraft:unwalkable Boolean false Sets the block as unwalkable. Mobs would not attempt to path over top of it when the value is set to true.

Block Definition Properties

These properties are part of the Block Definition. This helps the system determine how to parse and initialize this block.

Name Type Default Value Description
format_version String Specifies the version of the game this entity was made in. If the version is lower than the current version, any changes made to the entity in the vanilla version will be applied to it.

Code Example

Example

{
  "format_version": "1.16.0",
  "minecraft:block": {
    "description": {
      "identifier": "design:lavenderstone"
    },
    "components": {
      "minecraft:loot": "loot_tables/chests/simple_dungeon.json",
      "minecraft:destroy_time": 4.0,
      "minecraft:friction": 0.6,
      "minecraft:map_color": "#00ff00",
      "minecraft:flammable": {
        "flame_odds": 50,
        "burn_odds": 0
    },
      "minecraft:block_light_emission": 1.0
    }
  }
}


Block Description Properties

Name Type Default Value Description
identifier String The identifier for this block. The name must include a namespace and must not use the Minecraft namespace unless overriding a Vanilla block.

Block Event Responses

Event responses for block trigger components.

Name Type Default Value Description
add_mob_effect JSON Object Apply mob effect to target.
Name Type Default Value Description
amplifier Integer 0 The amplifier for the mob effect.
duration Decimal 0.0 The duration of the mob effect.
effect String The mob effect to apply.
target Minecraft Filter self The target context to execute against.
damage JSON Object Deals damage to the target.
Name Type Default Value Description
amount Integer 0 The amount of damage to deal.
target Minecraft Filter self The target context to execute against.
type String The type of damage to deal.
decrement_stack JSON Object Decrement item stack.
die JSON Object Kill target. If target is self and this is run from a block then destroy the block.
Name Type Default Value Description
target Minecraft Filter self The target context to execute against.
play_effect JSON Object Spawns a particle effect relative to target position.
Name Type Default Value Description
data Integer 0 Particle data value.
effect String The name of the particle effect to create.
target Minecraft Filter self The target context to execute against.
play_sound JSON Object Play a sound relative to target position.
Name Type Default Value Description
sound String The name of the sound to play.
target Minecraft Filter self The target context to execute against.
remove_mob_effect JSON Object Removes mob effect from target.
Name Type Default Value Description
effect String The mob effect to remove. Use 'all' to remove all mob effects from target.
target Minecraft Filter self The target context to execute against.
run_command JSON Object Triggers a slash command or a list of slash commands.
Name Type Default Value Description
command String Slash command to run.
command array Array List of slash commands to run.
target Minecraft Filter self The target context to execute against.
set_block JSON Object Sets this block to another block type.
Name Type Default Value Description
block_type String The type of block to set.
set_block_at_pos JSON Object Sets a block relative to this block to another block type.
Name Type Default Value Description
block_offset Vector [a, b, c] [0.0, 0.0, 0.0] The offset from the block's center.
block_type String The type of block to set.
set_block_property JSON Object Sets a block property on this block.
Name Type Default Value Description
property Molang Block property to set on the block.
spawn_loot JSON Object Spawn loot from block.
Name Type Default Value Description
table String File path, relative to the Behavior Pack's path, to the loot table file.
swing JSON Object Event causes the actor to swing.
teleport JSON Object Teleport target randomly around destination point.
Name Type Default Value Description
avoid_water Boolean true Determines if the teleport avoids putting the target in water.
destination Vector [a, b, c] [0.0, 0.0, 0.0] Origin destination of the teleport.
land_on_block Boolean true Determines if the teleport places the target on a block.
max_range Vector [a, b, c] [8.0, 8.0, 8.0] Max range the target can teleport relative to the origin destination.
target Minecraft Filter self The target context to execute against.
transform_item JSON Object Transforms item into another item.
Name Type Default Value Description
transform String Name of the item it should transform into

Code Example

Event Response Example


    "minecraft:block": {
      "description": {
        "identifier": "test:on_interact_change_state_block",
        "properties": {
          "minecraft:direction": {
          }
        }
      },
      "components": {
        "minecraft:on_interact": {
          "event": "test_event"
        }
      },
      "events": {
        "test_event": {
          "set_block_property": {
            "minecraft:direction": "1"
          }
        }
      }
    }


Block Trigger Components

Name Type Default Value Description
minecraft:on_fall_on JSON Object Describes event for this block.
Name Type Default Value Description
condition String The condition of event to be executed on the block.
event String The event executed on the block.
min_fall_distance Decimal 0.0 The minimum distance in blocks that an actor needs to fall to trigger this event.
target String self The target of event executed on the block.
minecraft:on_interact JSON Object Describes event for this block.
Name Type Default Value Description
condition String The condition of event to be executed on the block.
event String The event executed on the block.
target String self The target of event executed on the block.
minecraft:on_placed JSON Object Describes event for this block.
Name Type Default Value Description
condition String The condition of event to be executed on the block.
event String The event executed on the block.
target String self The target of event executed on the block.
minecraft:on_player_destroyed JSON Object Describes event for this block.
Name Type Default Value Description
condition String The condition of event to be executed on the block.
event String The event executed on the block.
target String self The target of event executed on the block.
minecraft:on_player_placing JSON Object Describes event for this block.
Name Type Default Value Description
condition String The condition of event to be executed on the block.
event String The event executed on the block.
target String self The target of event executed on the block.
minecraft:on_step_off JSON Object Describes event for this block.
Name Type Default Value Description
condition String The condition of event to be executed on the block.
event String The event executed on the block.
target String self The target of event executed on the block.
minecraft:on_step_on JSON Object Describes event for this block.
Name Type Default Value Description
condition String The condition of event to be executed on the block.
event String The event executed on the block.
target String self The target of event executed on the block.



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