Basic graphql server

index.js

const { GraphQLServer } = require('graphql-yoga')

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

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

const server = new GraphQLServer({ typeDefs, resolvers })

server.start(() => console.log('Server is running on localhost:4000'))

package.json

{
  "scripts": {
    "start": "node ."
  },
  "dependencies": {
    "graphql-yoga": "1.2.0"
  }
}