npm

Installation

_$: sudo apt-get install npm

Check

_$: npm config list
; cli configs
user-agent = "npm/3.5.2 node/v4.2.6 linux x64"

; builtin config undefined
globalconfig = "/etc/npmrc"
globalignorefile = "/etc/npmignore"
prefix = "/usr/local"

; node bin location = /usr/bin/nodejs
; cwd = /home/dceresuela
; HOME = /home/dceresuela
; "npm config ls -l" to show all defaults.

The packages will be installed by default in: <prefix>/lib/node_modules.

Package installation

a) Global

Use this mode for applications that are going to be used from the command line (e.g. gulp) and must be therefore globally available.

Installation directory: /usr/local/lib/node_modules

_$: npm install   <package> --global
_$: npm uninstall <package> --global

b) Local

Use this mode in the general case.

Installation directory: /home/<user>/.../node_modules

_$: npm install   <package>
_$: npm uninstall <package>

Configuration file

We can create a package.json file to track our project’s dependencies.

.../package.json:
-----------------
{
  "name": "Test",
  "version": "0.0.1"
}

This way, we can save all the packages we have been installing in the local mode as development or production dependencies for our project.

a) Save the installed package as a production dependency:

_$: npm install <package> --save

b) Save the installed package as a development dependency:

_$: npm install <package> --save-dev