graphql-bigint
A wider integer type for graphql-js than the default 32-bit GraphQLInt
. This implementation gives you 53-bit integers.
The problem
The GraphQL spec limits its Int
type to 32-bits. Maybe you've seen this error before:
GraphQLError: Argument "num" has invalid value 9007199254740990.
Expected type "Int", found 9007199254740990.
Why? 64-bits would be too large for JavaScript's 53-bit limit. According to Lee Byron, a 52-bit integer spec would have been "too weird" see this issue.
Usage
$ npm install graphql-bigint
Use it the same as any other scalar type, either input or output.
const BigInt = const SomeType = name: 'SomeType' fields: numberField: type: BigInt // this would throw an error with the GraphQLInt NumberMAX_SAFE_INTEGER