Common commands of NPM

One 、 What is? npm

node js Self contained package ( plug-in unit ) Manager

Two 、npm initialization

• npm init    Initialize project , establish package.json Project profile
• npm init -y    Initialize project All selected yes
• npm-v    View version

3、 ... and 、 Install source

npm config set registry url

Change the download source to Taobao :

npm config set registry http://registry.npm.taobao.org

View installation source :

npm config get registry

Four 、 Folder explanation

package.json Project matching file

• dependencies    Project needs dependencies ( The dependence required by the product environment )
• scripts    What are the commands of the project
• devDependencies   Dependencies needed during development

package-lock.json Cache address

node_modules ( rely on ) Download address of the package

5、 ... and 、 install

npm install <pkg>

Abbreviation :npm i jquery

Install the specified version : npm i [email protected]

Install all package.json Defined dependencies : npm i

Global installation :

• npm i <pkg> -g
• npm i js-cookie -g

View the global installation directory : npm root view -g

Development depends on :

• npm i <pkg> -D
• npm i <kpg>
• npm i less -D

Products depend on :

• npm i <pkg> -S
• npm i <pkg> --save
• npm i jquery -S

6、 ... and 、 uninstall

• npm uninstall <pkg>
• Abbreviation   npm r jquery

7、 ... and 、 edition

2.1.4 X.Y.Z

• 2X The big version      The big version , Is an incompatible update
• 1Y Medium version      Medium version , New content added , The original project is compatible
• 4Z Small version      Small version , Solved several Bug

8、 ... and 、 Help order

• npm install -h
• npm uninstall -h