Data Attachments

[verbal osprey]

I saw that in the new fabric api updates they added data attachments...
Does anyone know where i can read about them or explain them?

[faint prairie]

I usually find that the best source for the fabric api modules is in their testmods which should(in theory) cover most use cases of the module

In this case:

https://github.com/FabricMC/fabric/blob/1.21/fabric-data-attachment-api-v1/src/testmod/java/net/fabricmc/fabric/test/attachment/AttachmentTestMod.java