Álvaro Ramírez

{prefix}/lib/node_modules

vs

path/to/project/node_modules

npm config list

; cli configs
user-agent = "npm/2.14.2 node/v4.0.0 darwin x64"

; node bin location = /Users/user/.nvm/versions/node/v4.0.0/bin/node
; cwd = /Users/user/stuff/active/blog
; HOME = /Users/user
; 'npm config ls -l' to show all defaults.

npm config get prefix

/Users/user/.nvm/versions/node/v4.0.0

node install --global <package-name>

or

node install -g <package-name>

npm list --global

You can also use –depth=0 to make less verbose.

/Users/user/.nvm/versions/node/v4.0.0/lib
├─┬ babel-eslint@4.1.3
│ ├── acorn-to-esprima@1.0.4
│ ├─┬ babel-core@5.8.25
│ │ ├── babel-plugin-constant-folding@1.0.1
│ │ ├── babel-plugin-dead-code-elimination@1.0.2
...

npm install <package-name> --save

–save will add <package-name> dependency to your package.json.

See using a package.json.

Online documentation is great so far. More at docs.npmjs.com.