Node Package Manager

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$ which node
/usr/bin/node
$ node --version
v10.15.3

$ node
> console.log('Node is running');
Node is running
> .help
.break    Sometimes you get stuck, this gets you out
.clear    Alias for .break
.editor   Enter editor mode
.exit     Exit the repl
.help     Show repl options
.load     Load JS from a file into the REPL session
.save     Save all evaluated commands in this REPL session to a file
> .exit

$ which npm
/usr/bin/npm
$ npm --version
6.4.1

Updating npm

npm install npm@latest -g

npm install --global --production npm-windows-upgrade
npm-windows-upgrade --npm-version latest

Node Packaged Modules

$ npm config list
; cli configs
user-agent = "npm/6.9.0 node/v10.15.3 linux x64"

; userconfig /home/sitepoint/.npmrc
prefix = "/home/sitepoint/.node_modules_global"

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






$ npm config get prefix
/usr




$ cd ~ && mkdir .node_modules_global
$ npm config set prefix=$HOME/.node_modules_global


$ npm config get prefix
/home/sitepoint/.node_modules_global
$ cat .npmrc
prefix=/home/sitepoint/.node_modules_global






npm install npm@latest -g


export PATH="$HOME/.node_modules_global/bin:$PATH"





$ which npm
/home/sitepoint/.node_modules_global/bin/npm
$ npm --version
6.9.0





Installing Packages in Global Mode

$ npm install uglify-js --global
/home/sitepoint/.node_modules_global/bin/uglifyjs -> /home/sitepoint/.node_modules_global/lib/node_modules/uglify-js/bin/uglifyjs
+ uglify-js@3.5.3
added 3 packages from 38 contributors in 3.282s





Listing Global Packages



$ npm list --global

$ npm list -g --depth=0



Installing Packages in Local Mode

$ npm init
package name: (project)
version: (1.0.0)
description: Demo of package.json
entry point: (index.js)
test command:
git repository:
keywords:
author:
license: (ISC)




Uninstalling Local Packages

$ npm uninstall underscore

$ npm list



Installing a Specific Version of a Package

$ npm install underscore@1.9.0

$ npm list



Updating a Package

$ npm outdated





Managing the Cache

$ ls ~/.npm


$ npm cache clean --force





Audit

$ npm install express@4.8.0





Aliases


npm i <package> – install local package
npm i -g </package><package> – install global package
npm un </package><package> – uninstall local package
npm up – npm update packages
npm t – run tests
npm ls – list installed modules
npm ll or npm la – print additional package information while listing modules




$ npm i express momemt lodash mongoose body-parser webpack