设置淘宝镜像命令：npm config set registry https://registry.npm.taobao.org

查看当前镜像地址命令：npm config get registry

 成功显示了所设置的地址，代表成功更换镜像地址，国内常用的镜像地址：

 npm -------- https://registry.npmjs.org/
  yarn ------- https://registry.yarnpkg.com/
  cnpm ------- http://r.cnpmjs.org/
  taobao ----- https://registry.npm.taobao.org/
  nj --------- https://registry.nodejitsu.com/
  npmMirror -- https://skimdb.npmjs.com/registry/