Pfthb

Motive: basic express routing. since there are many files in one directory, i want this directory path handled by variable. But the other file handled sparately. So when i code the path, it will require file name only. This will make easy coding off course.

Lets see i have main file app.js located on "./ "
and here i code:

var next = require('./routes');
app.get('/', next.index);

The path is handled by variable next. I also have file index.js located on "./routes "
and here i code:

var express = require('express');
var router = express.Router();

router.get('/', function(req, res, next) 
 res.render('index', title: 'Express' );
);

module.exports = router;

Instead of doing respond, it return error as ->

Error: Route.get() requires a callback function but got a [object Undefined]

But when i replace next variable as follow from app.js:

var next = require('./routes/index');
app.get('/', next);

It work. So where do i need to change?

Simple..

In Node.js, when your use require, you aim to load a module

If you print (with console.log) the result of require('./routes') you will see that this module is not exposing index whatsoever

When you use require('./routes/index') you are loading a different module which contains the functionality you need

This code causes an error because when you use require it will automatically require the index.js file of the directory. So these 2 lines of code are the same.

var next = require('./routes');
var next = require('./routes/index');

So when you do this code it will cause an error because next.index does not exist.

var next = require('./routes');
app.get('/', next.index); // This will cause an error

The proper way to do this is:

var next = require('./routes');
app.get('/', next);