安装yarn

npm install -g yarn

查看yarn版本号

yarn --version

yarn淘宝源地址配置

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

还原配置镜像地址

yarn config delete registry
yarn config delete sass_binary_site

yarn config set registry https://registry.npmmirror.com
yarn config set sass_binary_site https://npmmirror.com/mirrors/node-sass