yarn init # 初始化一个新项目 # 添加依赖包 yarn add [package] yarn add [package]@[version] yarn add [package]@[tag] yarn global add [package] # 添加全局包 # 将依赖项添加到不同依赖项类别中 # 分别添加到 devDependencies、peerDependencies 和 optionalDependencies 类别中: yarn add [package] --dev yarn add [package] --peer yarn add [package] --optional # 升级依赖包 yarn upgrade [package] yarn upgrade [package]@[version] yarn upgrade [package]@[tag] yarn remove [package] # 移除依赖包 yarn # 安装项目的全部依赖 yarn install # 安装项目的全部依赖