nodejs默认源在国外，访问速度慢。可以手动修改源，但要每次都修改。

安装 nrm，指定源路径，不需要每次修改

 

npm install nrm -g

nrm ls

* 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/
  edunpm ----- http://registry.enpmjs.org/

 

nrm use taobao