execute-graphql.js

import {
  // GraphQLのキホン型
  GraphQLInt,
  GraphQLFloat,
  GraphQLString,
  GraphQLList,
  GraphQLObjectType,
  GraphQLEnumType,

  // フィールドのRequire化に必要
  GraphQLNonNull,

  // スキーマ作成に必要
  GraphQLSchema,

  // GraphQLクエリの実行に必要
  graphql
} from 'graphql';

const Query = new GraphQLObjectType({
  name: 'RootQueries',
  fields: () => ({
    echo: {
      type: GraphQLString,
      args: {
        message: {type: GraphQLString}
      },
      resolve(rootValue, args) {
        return `received: ${args.message}`
      }
    }
  })
})

const Schema = new GraphQLSchema({
  query: Query
})


let query = `
  query getEcho($inputMessage: String) {
    receivedMessage: echo(message: $inputMessage)
  }
`

// graphql関数はPromiseを返す
graphql(Schema, query, null, null, {inputMessage: "Hello"}).then(function(result) {
  console.log(result) // { data: { receivedMessage: 'received: Hello' } }
})