npm -v cnpm -v yarn -v 检查有没有下载

一、npm

  1. npm config set registry https://registry.npm.taobao.org --global
  2. npm config set disturl https://npm.taobao.org/dist --global

二、cnpm

npm install -g cnpm --registry=https://registry.npm.taobao.org

三、yarn

cnpm i yarn -g
yarn config set registry https://registry.npm.taobao.org

yarn add koa
yarn remove koa
npm cnpm yarn
npm init -y cnpm init -y yarn init -y
npm i koa -S cnpm i koa -S yarn add koa
npm uninstall koa -S cnpm uninstall koa -S yarn remove koa