HelloBinding.js

const { Binding } = require('graphql-binding')
const { makeExecutableSchema } = require('graphql-tools')

class HelloBinding extends Binding {

  constructor() {
    const typeDefs = `
      type Query {
        hello(name: String): String
      }
    `

    const resolvers = {
      Query: {
        hello: (_, args) => `Hello ${args.name || 'World'}!`,
      },
    }


    super({
      schema: makeExecutableSchema({ typeDefs, resolvers })
    })
  }

}