Koa - seperate routers

index.js

var app = require('koa')();

app
  .use(require('./router1').prefix('/route1').routes())
  .use(require('./router2').prefix('/route2').routes());

app.listen(8000);

router1.js

var router = new require('koa-router')();

router.get('/', function *(){
  this.body = "ello world, router1";
});

module.exports = router;

router2.js

var router = new require('koa-router')();

router.get('/', function *(){
  this.body = "ello world, router2";
});

module.exports = router;