Error: Cannot find module 'pug'

Question

Here is my index.js file:

const express = require('express')
const app = express()

app.set('views', __dirname + '/views');
app.set('view engine', 'pug')

app.get('/', function (req, res) {
  res.render('index', { title: 'Hey', message: 'Hello there!' })
})


app.listen(3333, function () {
  console.log('Example app listening on port 3333!')
})

index.pug file:

html
  head
    title= title
  body
    h1= Hello

package.json file:

{
  "name": "@npm-private/pug_with_node",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "keywords": [],
  "author": "",
  "license": "ISC",
  "dependencies": {
    "express": "^4.15.3",
    "jade": "^1.11.0",
    "pug": "^2.0.0-rc.2"
  }
}

When I run my server file then it shows me an error. in fact, I install pug and jade both npm modules:

Error: Cannot find module 'pug' at Function.Module._resolveFilename (module.js:485:15) at Function.Module._load (module.js:437:25) at Module.require (module.js:513:17) at require (internal/module.js:11:18) at new View (/home/software/node_modules/express/lib/view.js:80:30) at Function.render (/home/software/node_modules/express/lib/application.js:570:12) at ServerResponse.render (/home/software/node_modules/express/lib/response.js:971:7) at /home/software/Harsh Patel/pug_with_node/index.js:8:7 at Layer.handle [as handle_request] (/home/software/node_modules/express/lib/router/layer.js:95:5) at next (/home/software/node_modules/express/lib/router/route.js:137:13)

I used: 1) npm install pug@latest -S (2) npm install jade@latest -S — Harsh Patel, Jul 27 '17 at 06:09
@HarshPatel You need to have jade, pug and express all in package.json — Gopesh Sharma, Jul 27 '17 at 06:12
@HarshPatel Check you node modules and confirm pug is there. — Ved, Jul 27 '17 at 06:16
I delete my package.json file & node_modules directory and re install all packages. Then I got correct solution. — Harsh Patel, Jul 27 '17 at 06:31

score 24 · Answer 1 · answered Sep 27 '17 at 07:02

24

Try to add this line

app.engine('pug', require('pug').__express)

before

app.set('views', path.join(__dirname, 'views'));
app.set('view engine', 'pug');

This solved the same problem for me!

answered Sep 27 '17 at 07:02

Sergi Nadal

900
13
23

No I can't explain! I did more projects with express & pug, and I didn't have that error anymore. In fact, I didn't use the line app.engine('pug', require('pug').__express) anymore. – Sergi Nadal May 14 '18 at 06:26
2

All I needed to do was add `"pug": "^2.0.3` under `dependencies` in `package.json`... – Ronnie Royston Oct 01 '18 at 20:14
Life saver! For me this started to occur when compiling the server with webpack (I did `__non_webpack_require__("pug").__express` to preserve Node require – Dominic Jul 10 '23 at 21:58

score 19 · Answer 2 · answered Jul 27 '17 at 05:56

19

When there is a mismatch of module installation between Global and Local you will encounter this issue even if you have installed it all the modules. I would suggest you to install everything local to the project by including the dependency in the package.json

npm install --save express jade pug

answered Jul 27 '17 at 05:56

Gopesh Sharma

6,730
4
25
35

1

But I'm using the same version locally and globally. – Harsh Patel Jul 27 '17 at 06:32
@HarshPatel I would suggest you to remove the "dependencies" from the package.json and re-install using command `npm install --save express jade pug` – Gopesh Sharma Jul 27 '17 at 06:36
3

Why would you install both `jade` and `pug`? Isn't `jade` just an older version of `pug`? – leviathanbadger Sep 15 '17 at 19:18
2

@aboveyou00 My understanding is that Jade had to change its name (to Pug) because of a trademark dispute. I can't see a reason for installing them both. – Deane Jun 01 '18 at 17:47
This solution worked for me. Upvotted. (I did exclude "jade" from the command line but still...) – IllvilJa Jul 02 '21 at 04:36

score 5 · Answer 3 · answered Dec 09 '19 at 14:44

5

The simplest fix is to install pug as a development dependency: npm i -D pug

answered Dec 09 '19 at 14:44

deXtro

51
1
1

score 5 · Answer 4 · answered Jan 22 '20 at 21:35

put app.engine('pug', require('pug').__express)

before

app.set('views', path.join(__dirname, 'views')); app.set('view engine', 'pug');

works for me.

After I tried different methods listed. My understanding based on the official document, express by default uses app.engine() function where the callback function need to follow .__express syntax for 'pug' template specificlly.

score 3 · Answer 5 · answered May 23 '19 at 13:48

Runnig: npm install express worked for me

I had been forgotten to install express locally.

Also make sure you installed pug. (Run: npm i pug)

More explaination:

In my system express works even if i don't install it locally (without npm install express). so express couldn't find local pug module, because it was running from somewhere else.

Note that if you have express in your dependencies, it doesn't mean that you installed it. run npm install to make sure all of dependencies are installed.

score 2 · Answer 6 · edited May 15 '20 at 15:41

2

Run following Commands..

  1.npm remove pug express

  2.npm install pug express

This will solve the issue

edited May 15 '20 at 15:41

Jaimil Patel

1,301
6
13

answered May 15 '20 at 09:56

iohwio

119
1
1

score 2 · Answer 7 · answered Jul 22 '20 at 13:48

2

Install

npm i pug

Put

app.engine('pug', require('pug').__express);

before

app.set('views', path.join(__dirname, 'views'));
app.set('view engine','pug');

answered Jul 22 '20 at 13:48

recherche-shafeeq

71
1
4

This worked @recherche-shafeeq but please can you explain why it is needed for it to run smoothly? I checked other resources online but their explanations were not clear – Ekanem Eno Aug 24 '20 at 04:25
@Ekanem Eno because in order to run pug code you need to first install pug engine just like nodejs is installed as a run time environment for javascript.Please refer to pug docs to understand what pug is https://pugjs.org/api/getting-started.html – recherche-shafeeq Aug 29 '20 at 13:24

score 0 · Answer 8 · answered Jan 12 '19 at 21:55

in the terminal in your project install the pug like that:

npm install --save ejs pug express-handlebars

in app.js express

const app = express();

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

in the package.json should look like this

  "dependencies": {
    "body-parser": "^1.18.3",
    "ejs": "^2.6.1",
    "express": "^4.16.4",
    "express-handlebars": "^3.0.0",
    "pug": "^2.0.3"
  }

score 0 · Answer 9 · answered Jul 15 '19 at 18:57

0

Reinstalling pug fixed this for me:

yarn remove pug
yarn add pug

Thanks to Ron Royston for the hint: Error: Cannot find module 'pug'

answered Jul 15 '19 at 18:57

David Lemayian

2,679
1
20
18

score 0 · Answer 10 · edited Jun 01 '22 at 09:44

It is very simple if you are doing it for Nodejs express framework. You can follow any of the below options

If you have installed pug globally like adding -g then install pug once again in your project as local npm install pug
if the first option is still not working for you then add the following line in your package.json just after "express": "^4.17.1" in the dependency object.

"pug": "^3.0.0"

For me, the first method worked because if you follow the first method then the second will be automatically done.

score 0 · Answer 11 · edited Apr 20 '21 at 20:31

0

See in your package.json that your express and pug dependencies was installed or not If any of them is not installed then installed them by just using

npm i express

npm i pug

And your problem will remove

edited Apr 20 '21 at 20:31

Paul Roub

36,322
27
84
93

answered Apr 20 '21 at 20:24

Make Life Technical

1

score 0 · Answer 12 · answered Dec 06 '21 at 05:39

first verify the package express and pug and if u are open multi-project on your laptop make sure the the port that u use is not used because I got this bug ad when I change the port number is fix fixed. const path = require('path') // you don't need to install it app.set('the folder that contain the pug file',path.join(__dirname,'the folder that contain the pug file'); app.set('view engine','pug')

score 0 · Answer 13 · edited Jul 27 '22 at 09:58

0

Make sure both (express and pug) are listed as dependencies in your package.json

"dependencies": {
    "esm": "^3.2.25",
    "express": "^4.18.1",
    "mysql2": "^2.3.3",
    "pug": "^3.0.2",
    "sequelize": "^6.21.2"
},

edited Jul 27 '22 at 09:58

Tyler2P

2,324
26
22
31

answered Jul 25 '22 at 20:12

almentero

1
2

score -1 · Answer 14 · answered Sep 03 '18 at 23:25

I had this issue while doing nodeschool.io workshop. I looked where the workshop's compiler was looking for the module and when I manually checked /users/@yourUser/node_modules/ <-(UNIX Mac environment) it was missing. Installing Pug locally fixed the issue with npm install pug. In recent versions of Node is not necessary to add the --save flag. If you want to have the pug module added to your node-modules path just ad the -g flag after your install, example: npm install pug -g -g stands for global

score -1 · Answer 15 · answered May 13 '21 at 07:19

Many times, even after doing everything right, the error still occurs just because of a tiny mistake of adding a space after 'pug' i.e.,

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

Such a thing can easily get overlooked while checking your code. So do this instead.

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

Since I have just started learning about express and pug, I faced this issue and realized my problem.

Error: Cannot find module 'pug'

15 Answers15