Koa : what is the difference between koa-route and koa-mount. When should I use each?

Question

I am trying to use Koa.js, and checked out the following modules for routing requests: 1. koa-route 2. koa-mount

When I check their github page/tutorials in google, the examples look almost similar with minor differences.

1. For koa-route:

   var route = require('koa-route');
   app.use(route.get('/', index));
   
   //functions to handle the request
   function* index(){
       this.body = "this should be home page!";
   }
   

2. For koa-mount:

    //syntax to add the route
   var mount = require('koa-mount');
   var a = koa();
   app.use(mount('/hello', a));
   
   //functions to handle the request
   a.use(function *(next){
     yield next;
     this.body = 'Hello';
   });
   

The only difference seems to me is mount needs a middleware to serve the request, while route needs a generator to serve the requests.

I am confused when to use what and when to use both(saw that in some tutorials)?

Answer 1

Koa-mount's purpose is to mount one app into another. For example you can create standalone blog app and mount it to another app. You can mount apps others have created too.