[npm] npm and package installation, update, delete, npm update is invalid

1. above sea level

Update

# 查看npm版本
npm --version
# 最新版
npm install -g npm
# 指定版本
npm install -g [email protected]

2 bags

installation

• Global installation

npm install -g react
npm i -g react

• Install locally to devdependencies

npm install --save-dev react
npm i -D react

• Install locally to dependencies

npm install --save react
npm install react
npm i -S react
npm i react

• Specify version

npm i [email protected]

delete

• Delete global module

npm uninstall -g react

• Delete module

npm uninstall react

Update

• Check which modules can be updated

npm outdated

The feedback is as follows:

Package	Current	Wanted	Latest	Location
@babel/preset-env	7.12.10	7.12.11	7.12.11	pointsplus
@types/lodash	4.14.165	4.14.167	4.14.167	pointsplus

• Update all modules
  Borrow npm-check-updates module

npm i -g npm-check-updates
# 使用
npm-check-updates
# 简写
ncu
# 更新全部模块
ncu -u

The results are as follows:

package	description
@babel/preset-env	^7.12.10 → ^7.12.11

• To update a single module,
  you can add -D, -S or -g at the back according to the scope of action

npm update @babel/preset-env

View

• Globally installed packages

npm list -g
# 不包括子依赖
npm list -g --depth 0

• Locally installed packages

npm list
# 不包括子依赖
npm list --depth 0

3. npm update is invalid

# TODO