NPM正在安装大量的库

Question

当我npm install从package.json文件使用base时,它安装了337个库:/这是我的包文件

{
  "name": "system_glowna",
  "version": "2.0.0",
  "dependencies": {
    "angular2": "^2.0.0-beta.0",
    "bootstrap": "^3.3.6",
    "es6-promise": "^3.0.2",
    "es6-shim": "^0.33.3",
    "reflect-metadata": "0.1.2",
    "rxjs": "5.0.0-beta.0",
    "systemjs": "0.19.6",
    "zone.js": "0.5.10"
  },
  "devDependencies": {
    "del": "^1.2.0",
    "gulp": "^3.8.11",
    "gulp-autoprefixer": "^2.2.0",
    "gulp-concat": "^2.5.2",
    "gulp-inject": "^1.2.0",
    "gulp-less": "^3.0.3",
    "gulp-load-plugins": "^0.10.0",
    "gulp-minify-css": "^1.1.6",
    "gulp-minify-html": "^1.0.3",
    "gulp-rename": "^1.2.2",
    "gulp-replace": "^0.5.3",
    "gulp-uglify": "^1.2.0",
    "gulp-watch": "^4.2.4",
    "run-sequence": "^1.1.0"
  }
}

为什么要安装这么多的库？如何限制它们？

Answer 1

版本3.x之前的npm在树结构中安装库,因此每个库都有自己的node_modules,依此类推.它可能导致(或几乎总是引导)不同node_modules包中的重复库,并导致相当大的node_modules文件夹.事情变得棘手,例如在Windows上,路径可能太长而无法在之后轻松删除node_modules.

但是,在3.x发布npm之后,它默认使用平面文件夹结构,并且只有在存在任何冲突时才会为每个库安装正确的版本.

请注意自己 - 为了让每个库正常工作,npm安装了如此多的库这一事实:)