Basic Express and GraphQL Setup

index.js

'use strict';

const express = require('express');
const bodyParser = require('body-parser');
const graphql = require('graphql');

const app = express();

app.use(bodyParser.urlencoded({ extended: false }));
app.use(bodyParser.json());

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

// The root provides a resolver function for each API endpoint
const root = {
    hello: () => {
        return 'Hello world!';
    },
};

// Run the GraphQL query '{ hello }' and print out the response
graphql.graphql(schema, '{ hello }', root).then((response) => {
    console.log(JSON.stringify(response));
});

app.listen(8080, (app) => {
    console.log('App is listening');
});