# npm
使用npm安装模块分为本地安装和全局安装。
本地安装：npm install express 会安装到当前项目
全局安装：npm install express -g 会安装到指定的目录(node_global)
另外，如果没有设置全局目录node_global，那么全局安装的文件将会保存到 C:\Users\hades\AppData\Roaming\npm (hases是自己设置的计算机名字)
安装好node后，要设置一下node_global和node_cache(node缓存文件夹)
在node安装目录创建node_global和node_cache文件夹
设置环境变量：
用户变量设置：将用户变量中 PATH 的值改成 D:\Program Files\nodejs\node_global，没有PATH，可以直接添加。
系统变量设置：添加变量 NODE_PATH 值为：D:\Program Files\nodejs\node_modules
- 打开cmd，执行
npm config set prefix "D:\Program Files\nodejs\node_global"
npm config set cache "D:\Program Files\nodejs\node_cache"
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- 有时候用npm拉取包可能会很慢，可以用淘宝npm镜像代替npm进行拉包，就像github和gitee
执行：
npm install -g cnpm --registry=https://registry.npm.taobao.org
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# yarn 2.0 以上
# 先安装1.X
npm -g install yarn
# 安装3.x版本
export https_proxy=http://192.168.2.10:7890
yarn set version stable
# 查看版本号
yarn --version
# 本机设置(全局设置)
vim ~/.yarnrc.yml
globalFolder: "D:\\repositories\\yarn3-repository\\Data\\global"
yarnPath: "D:\\repositories\\yarn3-repository\\.yarn\\releases\\yarn-3.2.0.cjs"
cacheFolder: "D:\\repositories\\yarn3-repository\\Cache"
installStatePath: "D:\\repositories\\yarn3-repository\\.yarn\\install-state.gz"
npmRegistryServer: "https://repo.huaweicloud.com/repository/npm/"
# angular 项目必须设置 默认pnp
nodeLinker: node-modules
# 单个项目设置
yarn config set prefix "D:\repositories\yarn3-repository\Data"
yarn config set globalFolder "D:\repositories\yarn3-repository\Data\global"
yarn config set yarnPath "D:\repositories\yarn-repository\.yarn\releases\yarn-3.2.0-rc.10.cjs"
yarn config set installStatePath "D:\repositories\yarn3-repository\.yarn\install-state.gz"
yarn config set cacheFolder "D:\repositories\yarn3-repository\Cache"
yarn config set link-folder "D:\repositories\yarn3-repository\Data\link"
yarn config set pnpUnpluggedFolder "D:\repositories\yarn3-repository\.yarn\unplugged"
yarn config set npmRegistryServer "http://127.0.0.1:8081/repository/npm_huawei"
yarn config set unsafeHttpWhitelist --json '["127.0.0.1"]'
# nodeLinker 默认值是 pnp, yarn install后不生成node_modules目录，项目运行有些依赖会报错，建议直接改 node-modules
yarn config set nodeLinker node_modules
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# Accessing the list of commands
yarn help
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# Starting a new project
yarn init
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# Installing all the dependencies
yarn
yarn install
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# Adding a dependency
yarn add [package]
yarn add [package]@[version]
yarn add [package]@[tag]
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# Adding a dependency to different categories of dependencies
yarn add [package] --dev # dev dependencies
yarn add [package] --peer # peer dependencies
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# Adding a global dependency(not support)
Adding a global dependency (opens new window)
yarn global add [package]
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# Upgrading a dependency
yarn up [package]
yarn up [package]@[version]
yarn up [package]@[tag]
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# Removing a dependency
yarn remove [package]
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# Upgrading Yarn itself
yarn set version latest
yarn set version from sources
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