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JavaScript Express Basics Parameters, Query Strings, and Modularizing Routes Modular Routes

Juan Herrera
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Juan Herrera
Full Stack JavaScript Techdegree Student 13,285 Points
Posted by Juan Herrera
.a{fill-rule:evenodd;}techdegree
Juan Herrera
Full Stack JavaScript Techdegree Student 13,285 Points

I got an error, Error: Cannot find module './routes' after running nodemon

I got this error on the console:

node:internal/modules/cjs/loader:936
  throw err;
  ^

Error: Cannot find module './routes'
Require stack:
-~/Express Basics/flashcards/app.js
    at Function.Module._resolveFilename (node:internal/modules/cjs/loader:933:15)
    at Function.Module._load (node:internal/modules/cjs/loader:778:27)
    at Module.require (node:internal/modules/cjs/loader:1005:19)
    at require (node:internal/modules/cjs/helpers:102:18)
    at Object.<anonymous> (~/Express Basics/flashcards/app.js:11:16)
    at Module._compile (node:internal/modules/cjs/loader:1103:14)
    at Object.Module._extensions..js (node:internal/modules/cjs/loader:1155:10)
    at Module.load (node:internal/modules/cjs/loader:981:32)
    at Function.Module._load (node:internal/modules/cjs/loader:822:12)
    at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:77:12) {
  code: 'MODULE_NOT_FOUND',
  requireStack: [
    '~/Express Basics/flashcards/app.js'       
  ]
}
[nodemon] app crashed - waiting for file changes before starting...

This is my code:

App.js

const express = require('express');
const bodyParser = require('body-parser');
const cookieParser = require('cookie-parser');

const app = express();
app.use(bodyParser.urlencoded({extended:false}));
app.use(cookieParser());

app.set('view engine', 'pug');

const routes = require('./routes');

app.use(routes);

app.use((req, res, next) => {
    console.log("World");
    next();
});

app.use((req, res, next) => {
    const err = new Error('Not Found');
    err.status = 404;
    next(err);
});

// error handler
app.use((err, req, res, next) => {
    res.locals.error = err;
    res.status(err.status);
    res.render('error', err);
});

app.listen(3000, () => {
    console.log('The application is running on localhost:3000!')
});

index.js

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

// Root Route
router.get('/', (req, res) => {
    const name = req.cookies.username;    
    if (name) {
        res.render('index', {name});
    } else {
        res.redirect('/hello');
    }    
});

// Cards route
router.get('/cards', (req, res) => {
    res.render('card', {prompt: "Who is buried in Grant's tomb?"});
});

// Hello route
router.get('/hello', (req, res) => {
    const name = req.cookies.username;
    if (name) {
        res.redirect('/');
    } else {
        res.render('hello');
    }
});

// Hello Post 
router.post('/hello', (req, res) => {
    res.cookie('username', req.body.username);
    res.redirect('/');
});

// Goodbye Route
router.post('/goodbye', (req, res) => {
    res.clearCookie('username');
    res.redirect('/hello');
});

module.exports = router;

2 Answers

Marcio Gessoni
Marcio Gessoni
14,941 Points
Marcio Gessoni
Marcio Gessoni
14,941 Points

I got this same error: Error: Cannot find module './routes'

To fix it I realized that I had to put the routes folder at the same level as view and not inside it. Problem solved.