npm config set registry https://registry.npm.taobao.org
yarn的安装:
下载node.js，使用npm安装 npm install -g yarn 查看版本：yarn --version Yarn 淘宝源安装 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