apollo-graphql-api

index.js

const Koa = require('koa');
const { ApolloServer, gql } = require('apollo-server-koa');

// Construct a schema, using GraphQL schema language
const typeDefs = gql`
 type Query {
   hello: String
 }
`;

// Provide resolver functions for your schema fields
const resolvers = {
   Query: {
       hello: () => 'Hello world!',
   },
};

// Set playground settings
const playground = {
   settings: {
       'editor.theme': 'dark',
       'editor.cursorShape': 'line'
   }
}

const server = new ApolloServer({ typeDefs, resolvers, playground });

const app = new Koa();
server.applyMiddleware({ app });

app.listen({ port: 4000 }, () =>
   console.log(`🚀 Server ready at http://localhost:4000${server.graphqlPath}`),
);