module.js:327 Error: Cannot find module 'express'

Question

Hello I am new in a nodejs and when I run any file in command prompt like:-

C:\\demoData>node demo.js

I get error li9ke this

module.js:327
    throw err;
    ^

Error: Cannot find module 'express'
    at Function.Module._resolveFilename (module.js:325:15)
    at Function.Module._load (module.js:276:25)
    at Module.require (module.js:353:17)
    at require (internal/module.js:12:17)
    at Object.<anonymous> (C:\demoData\shahzad.js:1:77)
    at Module._compile (module.js:409:26)
    at Object.Module._extensions..js (module.js:416:10)
    at Module.load (module.js:343:32)
    at Function.Module._load (module.js:300:12)
    at Function.Module.runMain (module.js:441:10)

I did R&D and get the solution

npm install express

And my Problem has solved using this. But Why I required this I have already express folder globally.this path

C:\Users\broswire\AppData\Roaming\npm\node_modules;

I want to use this node_modules, I don't want locally node_modules.

Answer 1

Node encourages using locally installed modules. Generally, using modules installed with npm install --global or npm install -g should be reserved for cli tools and things used systemwide. So to use express in a project, it is recommended to npm install express in that directory. It is also useful to add a package.json file to save the versions of your dependencies. Then you can just navigate to your project and run npm install and it will install the required dependencies.