How to create "On Drop" function on an item so that this item can awso later recognize what exactly is dropped on it (for crafting) ?

Development Programming & Scripting
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4

It’s not 3d at all. These are widgets.

There is no way to help if we do not know what the script is doing. How it could work:

onDrop → (is container empty) → Get Payload → extract it → add to slot → add it or its ID to the table → have the crafting table compare the container content against a crafting recipe