The Power of GraphQL Directives

GraphQL directives can eliminate repetitive boilerplate in server implementations. Two practical use cases are covered: computing derived fields using the `graphql-directive-computed-property` library (which lets you define computed properties in the schema without touching resolvers), and integrating REST APIs using `graphql-directive-rest` (which removes the need to write fetch-based resolvers entirely by annotating fields with `@rest`). A template repository is also provided for building custom directives using Apollo Server Express and Jest.