执行“npm install”后安装了太多 npm 模块

My package.json:

{
  "name": "thumbnaillist-gulp",
  "version": "1.0.0",
  "description": "",
  "main": "index.js",
  "scripts": {
    "test": "echo \"Error: no test specified\" && exit 1"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "browserify": "^12.0.1",
    "gulp": "^3.9.0",
    "gulp-concat": "^2.6.0",
    "gulp-react": "^3.1.0",
    "gulp-util": "^3.0.7",
    "react": "^0.13.3",
    "react-script-loader": "0.0.1",
    "reactify": "^1.1.1",
    "vinyl-source-stream": "^1.1.0",
    "watchify": "^3.6.1"
  }
}

奇怪的是，当我执行“npm install”后，除了依赖项字段中列出的模块之外，还安装了其他模块，例如

drwxr-xr-x  14 xxx  wheel   476B Nov 18 18:41 acorn
drwxr-xr-x   7 xxx  wheel   238B Nov 18 18:41 amdefine
drwxr-xr-x   6 xxx  wheel   204B Nov 18 18:41 ansi-green
drwxr-xr-x   6 xxx  wheel   204B Nov 18 18:41 ansi-regex
drwxr-xr-x   6 xxx  wheel   204B Nov 18 18:41 ansi-styles
drwxr-xr-x   6 xxx  wheel   204B Nov 18 18:41 ansi-wrap
drwxr-xr-x   6 xxx  wheel   204B Nov 18 18:41 anymatch
drwxr-xr-x   9 xxx  wheel   306B Nov 18 18:41 archy
drwxr-xr-x   6 xxx  wheel   204B Nov 18 18:41 arr-diff
drwxr-xr-x   6 xxx  wheel   204B Nov 18 18:41 arr-flatten
drwxr-xr-x   5 xxx  wheel   170B Nov 18 18:41 array-differ
drwxr-xr-x   8 xxx  wheel   272B Nov 18 18:41 array-filter
drwxr-xr-x   9 xxx  wheel   306B Nov 18 18:41 array-map
drwxr-xr-x   9 xxx  wheel   306B Nov 18 18:41 array-reduce
drwxr-xr-x   6 xxx  wheel   204B Nov 18 18:41 array-slice
drwxr-xr-x   5 xxx  wheel   170B Nov 18 18:41 array-uniq
drwxr-xr-x   6 xxx  wheel   204B Nov 18 18:41 array-unique
drwxr-xr-x   6 xxx  wheel   204B Nov 18 18:41 arrify
drwxr-xr-x   8 xxx  wheel   272B Nov 18 18:41 asn1.js
drwxr-xr-x  10 xxx  wheel   340B Nov 18 18:41 assert
drwxr-xr-x  10 xxx  wheel   340B Nov 18 18:41 ast-types
drwxr-xr-x   9 xxx  wheel   306B Nov 18 18:41 astw
drwxr-xr-x   9 xxx  wheel   306B Nov 18 18:41 async-each
drwxr-xr-x  11 xxx  wheel   374B Nov 18 18:41 balanced-match
drwxr-xr-x   8 xxx  wheel   272B Nov 18 18:41 base62
drwxr-xr-x   9 xxx  wheel   306B Nov 18 18:41 base64-js
drwxr-xr-x   6 xxx  wheel   204B Nov 18 18:41 beeper
drwxr-xr-x   6 xxx  wheel   204B Nov 18 18:41 binary-extensions
drwxr-xr-x  10 xxx  wheel   340B Nov 18 18:41 bn.js
drwxr-xr-x   7 xxx  wheel   238B Nov 18 18:41 brace-expansion
drwxr-xr-x   7 xxx  wheel   238B Nov 18 18:41 braces
drwxr-xr-x   7 xxx  wheel   238B Nov 18 18:41 brorand
drwxr-xr-x  13 xxx  wheel   442B Nov 18 18:41 browser-pack
drwxr-xr-x   7 xxx  wheel   238B Nov 18 18:41 browser-resolve
drwxr-xr-x  12 xxx  wheel   408B Nov 18 18:41 browserify
drwxr-xr-x  17 xxx  wheel   578B Nov 18 18:41 browserify-aes
drwxr-xr-x   8 xxx  wheel   272B Nov 18 18:41 browserify-cipher
drwxr-xr-x   7 xxx  wheel   238B Nov 18 18:41 browserify-des
drwxr-xr-x   8 xxx  wheel   272B Nov 18 18:41 browserify-rsa
drwxr-xr-x  16 xxx  wheel   544B Nov 18 18:41 browserify-sign
drwxr-xr-x   8 xxx  wheel   272B Nov 18 18:41 browserify-zlib
drwxr-xr-x  11 xxx  wheel   374B Nov 18 18:41 buffer
drwxr-xr-x  11 xxx  wheel   374B Nov 18 18:41 buffer-xor

有什么提示吗？我的 NPM 坏了吗？或者我没有写package.json以正确的方式。

不，没有什么问题，NPM 现在将所有依赖项安装到根模块文件夹中，除非存在版本冲突。您看到的所有其他模块都是您安装的模块的依赖项。

来自NPM 3.0.0 发行说明 https://github.com/npm/npm/releases/tag/v3.0.0:

您的依赖项现在将最大限度地平坦安装。只要可能，所有依赖项及其依赖项以及它们的依赖项都将安装在项目的 node_modules 文件夹中，没有嵌套。仅当两个（或更多）模块具有冲突的依赖关系时，您才会看到彼此嵌套的模块。