npm切换淘宝镜像

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

安装yarn

sudo npm install -g yarn

yarn切换淘宝镜像

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

yarn sass 切换淘宝镜像

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