Slot holds
Whether one inventory slot holds an item of a type.
A Minecraft element (a check) in Items & inventories. Needs the Basic plan or higher to go live; building and testing are free.
Example
When a player joins → If Slot holds 8 minecraft:compass → Skip the gift.
Also called
slot is, item in slot is, check slot
Works as a data pack?
No. This one needs the Elementium plugin on a Paper server.
What you give it
- Player
- Slot