GraphQL | Express

server.js

const express = require('express');
const express_graphql = require('express-graphql');
const { buildSchema } = require('graphql');

const schema =  buildSchema(`
  type Query{
      message: String
  }
`);

// RESOLVERS
const root = {
    message: () => 'Hello world'
}

const app = express();

app.use('/graphql', express_graphql({
    schema: schema,
    rootValue: root,
    graphiql: true
}));

const port = process.env.PORT || 7000;

app.listen(port, () => console.log(`App started and successfully & is listening to port ${port}`));