在使用npm安装Express时获取更多的依赖项文件

Question

在nodejs上使用npm安装express。越来越依赖于node_modules文件夹。

PS C:\Users\EXCRIN-4\WebstormProjects\FiducialCover> npm install express --save 
fiducialcover@1.0.0 C:\Users\EXCRIN-4\WebstormProjects 
`-- express@4.13.4 
    +-- accepts@1.2.13 
    | +-- mime-types@2.1.9 
    | | `-- mime-db@1.21.0 
    | `-- negotiator@0.5.3 
    +-- array-flatten@1.1.1 
    +-- content-disposition@0.5.1 
    +-- content-type@1.0.1 
    +-- cookie@0.1.5 
    +-- cookie-signature@1.0.6 
    +-- debug@2.2.0 
    | `-- ms@0.7.1 
    +-- depd@1.1.0 
    +-- escape-html@1.0.3 
    +-- etag@1.7.0 
    +-- finalhandler@0.4.1 
    | `-- unpipe@1.0.0 
    +-- fresh@0.3.0 
    +-- merge-descriptors@1.0.1 
    +-- methods@1.1.2 
    +-- on-finished@2.3.0 
    | `-- ee-first@1.1.1 
    +-- parseurl@1.3.1 
    +-- path-to-regexp@0.1.7 
    +-- proxy-addr@1.0.10 
    | +-- forwarded@0.1.0 
    | `-- ipaddr.js@1.0.5 
    +-- qs@4.0.0 
    +-- range-parser@1.0.3 
    +-- send@0.13.1 
    | +-- destroy@1.0.4 
    | +-- http-errors@1.3.1 
    | | `-- inherits@2.0.1 
    | +-- mime@1.3.4 
    | `-- statuses@1.2.1 
    +-- serve-static@1.10.2 
    +-- type-is@1.6.10 
    | `-- media-typer@0.3.0 
    +-- utils-merge@1.0.0 
    `-- vary@1.0.1 

npm WARN fiducialcover@1.0.0 No repository field. 
PS C:\Users\EXCRIN-4\WebstormProjects\FiducialCover> 

以上文字是从命令提示符下得到的，这些都是安装时安装快递uaing NPM文件...我不知道该怎么办...

帮我理清这个问题.. 。

Answer 1

没有错，快递也是nodejs模块，并有自己的依赖，以此来运行，NPM，递归地为每个模块下载所有dependend依赖。如果你打开node_modules/express/package.json你会得到以下部分：

"dependencies": { 
    "accepts": "~1.2.12", 
    "array-flatten": "1.1.1", 
    "content-disposition": "0.5.0", 
    "content-type": "~1.0.1", 
    "cookie": "0.1.3", 
    "cookie-signature": "1.0.6", 
    "debug": "~2.2.0", 
    "depd": "~1.0.1", 
    "escape-html": "1.0.2", 
    "etag": "~1.7.0", 
    "finalhandler": "0.4.0", 
    "fresh": "0.3.0", 
    "merge-descriptors": "1.0.0", 
    "methods": "~1.1.1", 
    "on-finished": "~2.3.0", 
    "parseurl": "~1.3.0", 
    "path-to-regexp": "0.1.7", 
    "proxy-addr": "~1.0.8", 
    "qs": "4.0.0", 
    "range-parser": "~1.0.2", 
    "send": "0.13.0", 
    "serve-static": "~1.10.0", 
    "type-is": "~1.6.6", 
    "utils-merge": "1.0.0", 
    "vary": "~1.0.1" 
} 

他们都是快递的依赖关系会自动NPM下载。