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关于 npm 和 yarn 总结一些细节

Searches the local package tree and attempts to simplify the overall structure by moving dependencies further up the tree, where they can be more effectively shared by multiple dependent packages. For example, consider this dependency graph: a +-- b <-- depends on c@1.0.x | `-- c@1.0.3 `-- d <-- depends on c@~1.0.9 `-- c@1.0.10 In this case, npm dedupe will transform the tree to: a +-- b +-- d `-- c@1.0.10 Because of the hierarchical nature of node's module lookup, b and d will both get their dependency met by the single c package at the root level of the tree. 复制代码 // npm7 以后微调 // 在保持上述原则的基础上,升级了如下细微的规则: In some cases, you may have a dependency graph like this: a +-- b <-- depends on c@1.0.x +-- c@1.0.3 `-- d <-- depends on c@1.x `-- c@1.9.9 During the installation process, the c@1.0.3 dependency for b was placed in the root of the tree. Though d's dependency on c@1.x could have been satisfied by c@1.0.3, the newer c@1.9.0 dependency was used, because npm favors updates by default, even when doing so causes duplication. Running npm dedupe will cause npm to note the duplication and re-evaluate, deleting the nested c module, because the one in the root is sufficient. To prefer deduplication over novelty during the installation process, run npm install --prefer-dedupe or npm config set prefer-dedupe true. Arguments are ignored. Dedupe always acts on the entire tree. Note that this operation transforms the dependency tree, but will never result in new modules being installed. Using npm find-dupes will run the command in --dry-run mode. Note: npm dedupe will never update the semver values of direct dependencies in your project package.json, if you want to update values in package.json you can run: npm update --save instead.During the installation process, the c@1.0.3 dependency for b was placed in the root of the tree. Though d's dependency on c@1.x could have been satisfied by c@1.0.3

04

前端项目结构和如何开发

my-project ├── .idea # 这个是编辑器生成的 ├── build # Webpack 配置文件放在这里 ├── config # Vue 基本配置文件放在这里 ├── node_modules # 第三方依赖 ├── src # 项目源码(核心文件) │ ├── assets # 资源文件(js, css, scss) │ ├── components # 所有组件 │ ├── js # 自己写的 js,里面各种工具类方法等 │ ├── mixins # 混合 │ ├── router # 路由 │ ├── vuex # 状态管理 │ ├── App.vue # 根组件 │ └── main.js # 入口文件 ├── static # 静态资源,一般放 img ├── theme # 主题文件,修改的 Element-UI 主题 ├── .babelrc # babel 编译配置 ├── .editorconfig # 代码格式 ├── .gitignore # Git 提交忽略的文件配置 ├── .postcssrc.js # 转换 css 的工具配置文件 ├── element-variables.css # Element 全局定义的变量,不明白为啥放这儿 ├── index.html # 主页模板 ├── package-lock.json # 用来锁定依赖的版本号(NPM 自动生成) ├── package.json # 项目基本信息 └── README.md # 项目介绍 ————————————————

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