开发环境npm-cnpm-yarn

一、npm

npm config set registry https://registry.npm.taobao.org --global
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