Grouping routes in Express

Since express 4 you can define and compose routers

const app = require('express');
const adminRouter = app.Router();

adminRouter.use(isAdmin);
adminRouter.get("https://stackoverflow.com/", admin.index); /* will resolve to /admin */
adminRouter.post('/post', csrf, admin.index); /* will resolve to /admin/post */

app.use('/admin', adminRouter); 

Hope that helps!