apollo-errors

apollo-errors v1.9.0 is a utility for creating machine-readable custom GraphQL errors for use with Apollo Server. It allows defining typed errors with structured data and internal logging data that can be separated from the client-facing response. The package provides createError() to define error classes, formatError() for server error formatting, and isInstance() for checking error types. It ships TypeScript definitions. The project appears to be in maintenance mode with no recent updates. Compared to alternatives like graphql-errors, it offers explicit data and internalData separation and built-in formatting for Apollo Server.