Express vs Koa vs Hapi - Landing Page

express_koa_hapi_landing.js

//Expressjs landing page
const express = require('express');
const app = express();

app.get('/', (req, res) => {
    res.send('Hello world, this is landing page');
});

let server = app.listen(3000, ()=> {
    console.log('Express is listening to http://localhost:3000');
});

// ---------------------- //

// Koajs landing 
const koa = require('koa');
const app = koa();

app.use( function* (){
    this.body = 'Hello world, this is landing page';
});

let server = app.listen(3000, ()=> {
    console.log('Koa is listening to http://localhost:3000');
});

// ---------------------- //

const Hapi = require('hapi');
const server = new Hapi.Server(3000);

server.route({
    method: 'GET',
    path: '/',
    handler: (request, reply)=> {
        reply('Hello world, this is landing page');
    }
});

server.start(()=> {
    console.log('Hapi is listening to http://localhost:3000');
});