When using type-fest Opaque or any other readonly symbol tag to get an opaque type, the result
type O = Opaque<string, "O">
type X = {partner_id: O};
ReturnType<typeof camelcaseKeys<X>>>
// Expected
// D: {partnerId: O}
// Actual
// D: {partnerId: {char_at, .....}}
It seems all functions for strings are also added to the return type instead of passing along the opaque type if it is a primitive.
sindresorhus
commented
2 years ago
When using type-fest
Opaqueor any other readonly symbol tag to get an opaque type, the resultIt seems all functions for strings are also added to the return type instead of passing along the opaque type if it is a primitive.