Why can't symbolic keys be stringified?

[hrueger]

Hi, I'm using SvelteKit together with Prisma with computed fields. Results cannot be stringified and sent to the client (in load for example), because that throws this error:

Cannot stringify POJOs with symbolic keys

Interestingly, if I just comment out those checks here and here, it works just fine. Is there a reason for this check and some edge cases I haven't yet ran into?

Thanks in advance.

For anyone wanting to test, here's a patchfile for yarn patch: devalue-npm-4.3.2-e483100d94.patch

[Fryuni]

Interestingly, if I just comment out those checks here and here, it works just fine. Is there a reason for this check and some edge cases I haven't yet ran into?

It "works" by silently ignoring any symbolic key.

devalue could serialize any well-know symbol (like Symbol.asyncIterator) and any global symbol (like Symbol.for('something')). It can't serialize any unique symbol (Symbol('something')) because, by the nature of unique symbols, the deserialization would not match any unique symbol the receiver might be expecting.