Record Module Functions Return Copies to Maintain Immutability and Avoid Unintended Side Effects

Why do the Record module's

modify

modify

remove

remove

, and

replace

replace

functions return a copy (

{ ...self }

{ ...self }

) of the input when there's no match for the key? The module is designed for immutable, closed records, so why not just return

self

self

? Seems like it's unnecessary extra work, and causes re-renders in things like React

Record Module Functions Return Copies to Maintain Immutability and Avoid Unintended Side Effects - Effect Community