This example project demonstrates how to implement error handling in a GraphQL server using the power of GraphQL Union Types and Functional Programming (using fp-ts library).

Running this example

1. Install all dependencies from the root of the repo (using yarn)
2. Run yarn start, alternatively to use the debugger run yarn dev
3. Go to the Playground or any GraphQL client (Altair, Insomnia, ...) or just cURL:

curl -X POST 'http://localhost:4000/' -H 'Content-Type: application/json' --data-raw '{ "query": "query hello { hello }" }'

Example