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0.2.0 • Public • Published


Local CDN dependency manager.

grunt-cdndeps is a Grunt plugin that manages a local dependencies directory based on CDN dependency URLs specified in a given JSON file at any one time.

Getting Started

This plugin requires Grunt ~0.4.1

If you haven't used Grunt before, be sure to check out the Getting Started guide, as it explains how to create a Gruntfile as well as install and use Grunt plugins. Once you're familiar with that process, you may install this plugin with this command:

npm install grunt-cdndeps --save-dev

Once the plugin has been installed, it may be enabled inside your Gruntfile with this line of JavaScript:


The "cdndeps" task


In your project's Gruntfile, add a section named cdndeps to the data object passed into grunt.initConfig().

In this example, grunt-cdndeps will read the contents of package.json and try to find a cdnDeps key whose value is a list of CDN urls, or an object whose values are lists of CDN urls. It will then download all of those files into tmp/cdns.

  cdndeps: {
    options: {
      src: "package.json",
      dest: "tmp/cdns"

It is important to note that tmp/cdns will have a folder structure that reflects the relative paths of the URLs.

Given JSON with cdn urls:

  "cdnDeps": {
    "default": [
    "IE78": [
    "IE7": [

cdns folder structure:

├── DmitryBaranovskiy
│   └── raphael
│       └── v2.1.2
│           └── raphael.js
├── ajax
│   └── libs
│       ├── angularjs
│       │   └── 1.2.3
│       │       ├── angular-resource.js
│       │       └── angular.js
│       ├── json3
│       │   └── 3.2.5
│       │       └── json3.js
│       ├── moment.js
│       │   └── 2.4.0
│       │       ├── lang
│       │       │   └── en-gb.js
│       │       └── moment.js
│       └── sizzle
│           └── 1.10.9
│               └── sizzle.js
└── kriskowal
    └── es5-shim
            └── v2.1.0
                └── es5-shim.js

Getting a list of paths to include in <script> tags

Once a folder is created that holds all of the required dependencies, there will most likely be a need to get a list of all the files in that folder, to include in <script> tags, for example. While this sits slightly outside of the scope of this plugin, we do provide a helper module in /lib that provides this feature.

Basic usage

  production: true,
  src: "package.json",
  dest: "libraries"
  • production, Boolean, Default: false -- whether the resulting list of paths will be used in a production environment.
  • src, String, Default: grunt.config("cdndeps.options.src") -- the source file used by grunt-cdndeps
  • dest, String, Default: grunt.config("cdndeps.options.dest") -- the target folder used by grunt-cdndeps

If production is set to true, a list of the actual URLs from the JSON will be returned, but with .min.js appended. If false, a list of filepaths to the libraries in the cdn_folder will be returned.

For cases where simply appending ".min.js" to a given URL will produce an invalid result, you can define a URL as an object instead of a String:

    "dev": "",
    "prod": "//"

In the above case, calling cdn_paths with production: true will give us // With production: false, we will instead get cdns/DmitryBaranovskiy/raphael/v2.1.2/raphael.js.


In lieu of a formal styleguide, take care to maintain the existing coding style. Add unit tests for any new or changed functionality. Lint and test your code using Grunt.

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