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