GraphQL schema example using CoffeeScript

graphql-schema.coffee

GraphQL = require("graphql")
GraphQLRelay = require("graphql-relay")
GraphQLUtilities = require("graphql/utilities")

__GREETING = "Hello World!"

Root = new GraphQL.GraphQLObjectType
  name: "Root"
  fields:
    hello:
      type: GraphQL.GraphQLString
      resolve: -> __GREETING

Mutation = new GraphQL.GraphQLObjectType
  name: "Mutation"
  fields:
    set_greeting: GraphQLRelay.mutationWithClientMutationId
      name: "SetGreeting"
      inputFields:
        greeting:
          type: new GraphQL.GraphQLNonNull(GraphQL.GraphQLString)
      outputFields:
        what_we_thought_of_your_mutation:
          type: GraphQL.GraphQLString
          resolve: ({thought}) -> "It was #{thought}!"
      mutateAndGetPayload: ({greeting}) ->
        __GREETING = greeting
        return {thought: "horrendous"}

schema = new GraphQL.GraphQLSchema
  query: Root
  mutation: Mutation

# console.log("Schema:\n\n" + GraphQLUtilities.printSchema(schema))

fetchQuery = (query) ->
  GraphQL.graphql(schema, query).then (result) ->
    console.log("Query result:\n\n" + JSON.stringify(result, null, 2))

# query = require("fs").readFileSync("schema/introspection_query.graphql")
query = """
mutation {
  set_greeting(input: {clientMutationId: "123", greeting: "Hola!"}) {
    clientMutationId
    what_we_thought_of_your_mutation
  }
}
"""

fetchQuery("{ hello }").then ->
  fetchQuery(query).then ->
    fetchQuery("{ hello }")

This is pretty old so I'm not sure about the exact API, but there certainly is a way to do that. I'd dig through the graphql package documentation.