View source and switch mirrors in two ways: npm and nrm

一、使用npm查看当前源、切换淘宝镜像、切换官方源

（1）npm查看当前源：

npm get registry

（2）npm设置淘宝镜像源：

npm config set registry http://registry.npm.taobao.org

（3）npm设置官方源：

npm config set registry http://www.npmjs.org

二、使用nrmView and switch mirrors

1、安装nvm,之后才可以使用nrm命令

Specifically how to install everyone can Baidu

2、通过nrmView and switch mirror sources（命令）：nrm ls

注意：下面的 * Indicates when the source is currently in use,

* 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/

3、If you want to use a certain one,直接use,For example, I want to use the source of Taobao mirror：

nrm use taobao

The following prompt appears, indicating that the switch is successful！