Server Side development with Node.js and Koa.js Quick Start Guide

Useful application methods

As mentioned earlier, the application object exposes some methods to make development easier and make some tasks easier to do. In this section, we will discuss some of the methods available in the application method:

• app.listen(...): The app.listen() method is used to create and return an HTTP Server. It is syntactical sugar around the native Node server.listen() method. It can be used as seen here: 

      const Koa = require('koa');      const app = new Koa();      app.listen(3000);

The preceding code block is essentially the same as the following one:

const http = require('http');const Koa = require('koa');const app = new Koa();http.createServer(app.callback()).listen(3000);

One or more Koa applications can be mounted on the ...