Installs package

npm install  /  npm i

Shows current version of

npm

npm --version  / npm -v

Creates

package.json

file with default values

npm init --yes  /  npm init -y

Installs package

moment

npm install moment --save  /  npm i moment -S

Installs package

lodash

for

dev environment

npm install lodash --save-dev  /  npm i moment -D

Installs package

live-server

globally so that other apps can use it

npm install --global live-server  /  npm i -g live-server

Other shortcuts - https://docs.npmjs.com/misc/config

Deletes all packages from

node_modules

that are extraneous packages (that are not listed in

package.json

)

npm prune

Before running the above command,

npm list --depth 0

showed several packages as extraneous. Extraneous are packages that are not listed in

dependencies

or

devDependencies

but installed in

node_modules

)

+-- gulp@4.0.2 extraneous
+-- gulp-sass@4.1.0 extraneous
`-- moment@2.27.0

Installs exactly the specified version of the module

npm install moment@2.25.2

Installs the specified module with the latest

patch

npm install moment@2.25

Installs the specified module with the latest

minor

and

patch

versions

npm install moment@1

Installs the latest version of the module (with latest

major

,

minor

and

patch

versions)

npm install moment

Only

major

version will stick to

1

but

minor

and

patch

will be the latest versions

"dependencies": {
    "moment": "^1.6.2"
}

Only updates

patch

but

major

and

minor

will be the specified versions

"dependencies": {
    "moment": "~1.6.2"
}

Exactly the specified version

1.6.2

will be installed

"dependencies": {
    "moment": "1.6.2"
}

The latest version of the package will be installed

"dependencies": {
    "moment": "*"
}

Shows globally installed modules

npm list --global --depth 0

Shows all packages without their dependencies (only top level)

npm list --depth 0

Shows all packages with only their dependencies (one level deep)

npm list --depth 1

We can run scripts that are listed in

scripts

key, inside

package.json

file. If the content is the following

"scripts": {
    "start": "node app.js",
    "server": "live-server"
}

Then we can run

npm run start

and npm will run

node app.js

We can also run

npm run server

and it will run

live-server

Deletes manually set default license (default license will become

ISC

)

npm config delete init-license

Deletes manually set default author name (default author will become empty string)

npm config delete init-author-name

Main properties / parameters that the file includes:

name

- name of the app (default is the name of the current folder)

version

- version of the app (default is 1.0.0 - major.manor.patch)

description

- short description for the project

main

- entry point - main JS file

keywords

- keywords that the app is related to

author

- project author

license

- default is ISC (Internet Systems Consortium)

Shows all the different ways we can use

npm install

command (in console)

npm install -h

Alternative to the above command

npm install --help