npm yarn 注释
npm init yarn init 初始化项目
npm install yarn 安装全部依赖
npm install react –save yarn add react 安装某个依赖，保存到 dependencies
npm uninstall react –save yarn remove react 移除某个依赖
npm install react –save-dev yarn add react –dev 安装某依赖,保存到 devDependencies
npm update [package] –save yarn upgrade [package] 更新生产环境某个依赖包
npm install axios –global yarn global add axios 全局安装某个依赖
npm install –save axios vue-axios yarn add axios vue-axios 同时下载多个依赖包
npm install [package]@[version] yarn add [package]@[version] 安装指定版本的包
npm rebuild yarn install –force 重新下载所有包