# Yahoo! UI Library

### loader 3.1.1

Yahoo! UI Library > loader
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### Module: loader

Loader dynamically loads script and css files. It includes the dependency info for the version of the library in use, and will automatically pull in dependencies for the modules requested. It supports rollup files and will automatically use these when appropriate in order to minimize the number of http connections required to load all of the dependencies. It can load the files from the Yahoo! CDN, and it can utilize the combo service provided on this network to reduce the number of http connections required to download YUI files.

This module contains the following classes:

- Loader

#### Submodules:

`loader-base`
  The YUI loader core
`rollup`
  Optional automatic rollup logic for reducing http connections when not using a combo service.
`yui3`
  YUI 3 module metadata

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