1.npm view and set mirror source
//查看使用的镜像源
npm get registry
//全局设置taobao镜像源
npm config set registry http://registry.npmmirror.org
//全局设置npm官方镜像源
npm config set registry http://www.npmjs.org
2.nrm image source management tool (npm registry manager)
Install nrm globally
npm install -g nrm
View currently available mirror sources
nrm ls
3. Which mirror source to use for dependency download
Use cnpm mirror source
nrm use cnpm