实验性只读input只读is只读validThe zero-based input slot index.
The item stack in the input slot, or undefined if the slot is empty.
The output item stack, or undefined if there is no output.
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The zero-based input slot index.
可选item: ItemStack
The item stack to place in the slot, or undefined to clear the slot.
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The identifier of a valid recipe to select.
Provides access to the slots and recipe of a players active crafting UI ie. stonecutter.