javascript - NodeJS + ExpressJS: What is routes/index.js and its purpose? -

what purpose of file?

is 'all' , post calls instantiated?

if so, wouldn't huge file when working large scale projects?

i've tried calling post, /authenticatelogin, file other routes/index.js, fails work, resulting in 404 error.

routes/login.js

var express = require('express'); var router = express.router();  router.get('/', function(req, res) {     res.render('login'); });  router.post('/authenticatelogin', function(req, res){     console.log("authenticating 2!");     res.send('number two!'); });  module.exports = router; 

but works when put in index.js file.

routes/index.js

var express = require('express'); var router  = express.router();  router.get('/', function(req, res) {     res.render('index', { title: 'home' }); });  router.post('/authenticatelogin', function(req, res){     console.log("authenticating 1!");     res.send('number one!'); });  module.exports = router; 

views/login.jade

extends layout  block content h1 login   form(method='post' action='/authenticatelogin')     input(type='text' placeholder='username' name='username')     input(type='password' placeholder='password' name='password')      input(type='submit') 

that's load framework , define routes.