/cfunction

The /cfunction command executes a sequence of Minecraft commands defined in a .mcfunction, with the same syntax as vanilla datapack functions (except with client-side commands only).

Usage

Function Files

The .mcfunction files are located in .minecraft\config\clientcommands\functions. Create a file with a .mcfunction extension in this directory, like example.mcfunction, and then write your client-side commands, one command per line, inside this file.

There are special file names that run automatically when the world starts. To learn how to use them, see the cstartup page.

Executing Functions

/cfunction <function_name>

• The function_name argument specifies the name of the .mcfunction file to execute (without the .mcfunction extension).

For example, lets say you want to detect all the entities around you that have armor with thorns enchantments, and glow them in red:

• Create a thorns.mcfunction file in .minecraft\config\clientcommands\functions and open it with a text editor.
• Write the command cglow three times to detect each level of thorns enchantment like this and save the file:

  cglow --keep-searching entities @e[nbt={ArmorItems:[{components:{"minecraft:enchantments":{levels:{"minecraft:thorns":1}}}}]}] 1 color red
  cglow --keep-searching entities @e[nbt={ArmorItems:[{components:{"minecraft:enchantments":{levels:{"minecraft:thorns":2}}}}]}] 1 color red
  cglow --keep-searching entities @e[nbt={ArmorItems:[{components:{"minecraft:enchantments":{levels:{"minecraft:thorns":3}}}}]}] 1 color red
  

• Now in the game, use the command /cfunction thorns. clientcommands will execute those three commands for you each time you run this command.