## 1.安装yarn ``` npm install -g yarn yarn --version // 设置淘宝源 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 ``` 使用yarn安装vue-cli ``` // 全局安装 yarn global add @vue/cli ```