yarn基本命令初始化一个新项目
yarn init
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添加依赖包
yarn add [package]
yarn add [package]@[version]
yarn add [package]@[tag]
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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
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升级依赖包
yarn upgrade [package]
yarn upgrade [package]@[version]
yarn upgrade [package]@[tag]
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移除依赖包
yarn remove [package]
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安装项目的全部依赖
yarn
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