nrm是npm的源管理器，进行源切换

全局安装

npm install -g nrm

源列表查看

nrm ls

查看当前源

nrm current

切换源

nrm use <registry>

添加源

nrm add <registry> <url>

删除源

nrm del <registry>

测试源速度

nrm test <registry>

npm镜像

npm ---------- https://registry.npmjs.org/
yarn --------- https://registry.yarnpkg.com/
tencent ------ https://mirrors.cloud.tencent.com/npm/ // 腾讯云
cnpm --------- https://r.cnpmjs.org/
taobao ------- https://registry.npmmirror.com/
npmMirror ---- https://skimdb.npmjs.com/registry/
hw ----------- https://mirrors.huaweicloud.com/repository/npm/ // 华为云