npm config set registry http://registry.npm.taobao.org/
npm config set registry https://registry.npmjs.org/
npm install -g cnpm --registry=https://registry.npm.taobao.org
设置npm仓库为淘宝镜像 / 设置回默认仓库 / 修改npm仓库源
原文：https://www.cnblogs.com/xuchao-blogs/p/14637689.html