GraphQL.js入門

npm init
npm install graphql --save

var { graphql, buildSchema } = require("graphql")

// Construct a schema, using GraphQL schema language
var schema = buildSchema(`
  type Query {
    hello: String
  }
`)

// The rootValue provides a resolver function for each API endpoint
var rootValue = {
  hello: () => {
    return "Hello world!"
  },
}

// Run the GraphQL query '{ hello }' and print out the response
graphql({
  schema,
  source: "{ hello }",
  rootValue,
}).then(response => {
  console.log(response)
})

node server.js

{
  data: {
    hello: "Hello world!"
  }
}