Code samples for “Understanding GraphQL Server” https://keywordbrain.com/blog/understanding-graphql-server/

arguments.js

let arguments = { someId: "1234" }
graphql(schema, query, null, arguments)

named.js

// named
query Foo { foo }

// unnamed
{ foo }

namedvariables.js

query Foo($someId: String) {
  foo(id: $someId) {
    bar
  }
}

publicapi.js

let BlogAuthor = new GraphQLObjectType({
  name: 'Author',
  fields: () => ({
    id: { type: GraphQLString },
    name: { type: GraphQLString }
  })
})

let BlogArticle = new GraphQLObjectType({
  name: 'Article',
  fields: {
    id: { type: new GraphQLNonNull(GraphQLString) },
    isPublished: { type: GraphQLBoolean },
    author: { type: BlogAuthor },
    title: { type: GraphQLString },
    body: { type: GraphQLString },
    keywords: { type: new GraphQLList(GraphQLString) }
  }
})

let RootQuery = new GraphQLObjectType({
  name: 'Query',
  fields: {
    article: {
      type: BlogArticle,
      args: { id: { type: GraphQLID } },
      // fetches an article from the database, including the author
      resolve: (_, {id}) => article(id)
    }
  }
})

let schema = new GraphQLSchema({
  query: RootQuery
});

result.js

graphql(schema, query).then((result) => {
  // do something with the result here
});

rootquery.js

let RootQuery = new GraphQLObjectType({
  name: 'Query',
  fields: …
})

schema.js

let schema = new GraphQLSchema({
  query: RootQuery,
  mutation: RootMutation
});