npm install is missing modules

问题

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 ?

回答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

回答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.

回答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

回答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.

回答5:

To resolve missing npm modules run:

sudo npm install -g npm-install-missing

来源：https://stackoverflow.com/questions/24652681/npm-install-is-missing-modules