NPM

• 查询当前镜像

npm get registry 

• 设置为淘宝镜像

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

• 设置为官方镜像

npm config set registry https://registry.npmjs.org/

YARN

• 查询当前镜像

yarn config get registry

• 设置为淘宝镜像

yarn config set registry https://registry.npm.taobao.org/

• 设置为官方镜像

yarn config set registry https://registry.yarnpkg.com

\

npm	yarn
npm install	yarn
npm install react --save	yarn add react
npm uninstall react --save	yarn remove react
npm install react --save-dev	yarn add react --dev
npm update --save	yarn upgrade