我如何要求在全球范围内随npm安装的模块？

Question

I have installed some-npm-module globally, but I get an error when I require() it:

$ node    
> const module = require('some-npm-module')
> import module from 'some-npm-module'

Error: Cannot find module 'some-npm-module'
    at Function.Module._resolveFilename (module.js:470:15)
    at Function.Module._load (module.js:418:25)
    at Module.require (module.js:498:17)
    at require (internal/module.js:20:19)
    at repl:1:12
    at realRunInThisContextScript (vm.js:22:35)
    at sigintHandlersWrap (vm.js:98:12)
    at ContextifyScript.Script.runInThisContext (vm.js:24:12)
    at REPLServer.defaultEval (repl.js:313:29)
    at bound (domain.js:280:14)

Core Node modules do seem to work without issue. The following produces no errors:

const http = require('http');

Why does this happen? Am I installing the module correctly?

Note that in this case I need to use the npm module in the terminal , not in a certain project.

Answer 1

You should only install modules globally if you plan to call them on the command line, according to the documentation :

If you want to use it as a command line tool, something like the grunt CLI, then you want to install it globally. On the other hand, if you want to depend on the package from your own module using something like Node's require, then you want to install locally.

This is because require() doesn't look in the global modules directory, so it'll never find some-npm-module if it's installed there.

Installing locally with npm install some-npm-module should resolve your issue and allow you to require from the REPL (as long as you consistently run the REPL from the same directory ).

Answer 2

Please Remove entire node_modules folder and re-install

• rm -rf node_modules

• npm install

Answer 3

After installing an npm module globally, to use it in your current project/dir, just link it.

npm link module_name

It should work.