npm 安装yarn 并下载地址配置为淘宝镜像

npm配置为淘宝镜像配置代码

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

恢复原配置代码

npm config set registry https://registry.npmjs.org

查看配置是否成功

npm config get registry

npm info express

安装cnpm

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

npm安装yarn

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

yarn设置为淘宝镜像 

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

yarn config set sass_binary_site http://cdn.npm.taobao.org/dist/node-sass -g