yarn init
// 默认添加到dependencies(生产依赖) yarn add [package] yarn add [package]@[version] // 指定依赖类别 yarn add [package] --dev // 同时添加多个依赖 yarn add [package] [package] [package] --dev
// 指定包名称升级指定依赖 不指定包名称升级全部依赖 yarn upgrade [package]
yarn remove [package]
yarn 或者 yarn install
安装到dependencies dev下就不用安装了code
yarn官网ci