npm install is missing modules

Question

Before I can run gulp in my project I need to run npm install. This works except on my computer, because I get the following error:

Error: Cannot find module 'socket.io'
    at Function.Module._resolveFilename (module.js:338:15)
    at Function.Module._load (module.js:280:25)
    at Module.require (module.js:364:17)
    ...

I can fix this with

$> npm install socket.io

Now when I do the install command again I get

Error: Cannot find module 'di'
    ...

When I install di and run the install command again I get:

Error: Cannot find module 'log4js'

I think that this might continue for a very long time. Any suggestions what is going on here and how to fix this ?

Hysteria

I have inherited a project where the original author apparently installed all dependencies globally or without -S flag. No answer here really answers this question. Is there not a way to automatically install all missing dependencies discovered as imported within the project files on build time by static analysis? – Lunetta

Answer 1

I've faced the same problem when bootstrapping a MEAN application and add each missing dependencie with npm install packageName --save was not an option so I came across to npm-install-missing whom has saved my life :)

Installation

npm install -g npm-install-missing

Usage

npm-install-missing

Appose

When I try this It tells me that I have no missing modules, although when I run npm list It is loaded with missing and unmet dependencies. – Cadmar

For me this also says it is finished but does nothing sadly! – Revisionism

This just goes through package.json in each dependency. I need to install dependencies, which are used in project, but somehow forgotten to install. – Lunetta

Getting UnauthorizedAccess. This is why I hate these pesky platforms with 9000 dependencies, in which 75% are outdated. Just stick to C++. – Kingery

Sadly an outdated answer: Error: The programmatic API was removed in npm v8.0.0 – Ance

Answer 2

Running npm install will install all dependencies that are specified in the package.json. Seems like you have quite a few dependencies that are not defined that way. Use npm install packageName --save and npm will add the package to your package.json.

Foppish

I have about 50 packages in my package.json file. As far as I know, the dependencies of these packages are handled by the package.json of these packages! – Hysteria

@JeanlucaScaljeri Yes they are. Do you use the latest version of Node & npm? – Foppish

This answer is not a solution. some missing module are dependencies of other module. npm: 2.15.1 have the same issue. – Fortification

Since 2017 --save is not needed. – Bowyer

Answer 3

I am using the same version of npm/node. Sometimes, it is like npm is "lost". What I suggest is :

• rm of your node modules (at least the one that is concerned)
• npm cache clean
• run "npm install" several times, until all dependencies are resolved and no message are displayed

Dyslexia

When you use npm cache clean it now says use npm cache verify instead, and both commands say you have to use the --force flag. – Prototherian

Answer 4

It seems that gulp need 'karma' dependencies (socket.io ,di ,log4js...) so you will have to run :

npm install karma

so just runing this command solved the problem, and all should be good, the same thing happens with grunt as well for some reasons.

Curbstone

Answer 5

This worked for me. By commenting 3 lines in C:\Program Files\nodejs\node_modules\npm\node_modules\graceful-fs\polyfills.js.

Refer [https://flaviocopes.com/cb-apply-not-a-function/]

// fs.stat = statFix(fs.stat) # Line: 61
// fs.fstat = statFix(fs.fstat) # Line: 62
// fs.lstat = statFix(fs.lstat) # Line: 63

Hudis

Answer 6

Beside other answers, if you are using Angular and cannot make new angular project and hangs, you can get into the folder and open terminal and write:

npm -i

Maybe useful for other things too!!

Sapotaceous

I think it wouldn't need the dash(-) before i, !! – Sapotaceous

Answer 7

I think the npm module madge would help you find the missing dependencies. It goes through your actual code and makes a list of all the dependencies found within. You could then do an npm i for each of the modules found.

Chimaera

Answer 8

Upgrade your npm version Install nvm which is easier to switch node js versions For me node 12.18.3 worked Just do: nvm use 12.18.3 to switch version

run npm install again and node_modules will appear

Langley

Answer 9

If the npm-install-missing does not work for you, knowing the name of the Packages that are missing will help you out here. All I had to do was first open my package.json file inside VSCode, then paste or type the names of the missing modules into it (under dependencies) according to the way other package names were written there. Then I ran npm install after that. This method is helpful when you are working on a file but somehow you did not get the package.json file or some of the modules are not listed therein.

Remember to stop and restart a running server after you do npm install for your new dependencies to reflect on your work.

Piscator

Answer 10

To resolve missing npm modules run:

sudo npm install -g npm-install-missing

Enterprising

This answer was already provided in 2015. If you agree that using the npm-install-missing package answers the original poster's question, then give the answer a thumbs up. If you want to say something to clarify the answer, leave a comment under the answer, but don't create a new one. – Horal

It is 8 years old one, does not work in latest node – Gambrel