npm

1. 查询当前镜像

npm get registry 

2. 设置为淘宝镜像

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

3. 设置为官方镜像

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

yarn

1. 查询当前镜像

yarn config get registry

2. 设置为淘宝镜像

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

3. 设置为官方镜像

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