Item stacks
Whether more than one of an item fits in a slot.
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 picks up an item → If Item stacks → Add to the pile.
Also called
stackable, can stack, stacks, max stack check
Works as a data pack?
No. This one needs the Elementium plugin on a Paper server.
What you give it
- Item