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# The Yahoo! User Interface Library (YUI) 3.0.0 beta 1

Note: This is YUI 3.x. Looking for YUI 2.x?

## YUI 3.0.0 beta 1

The YUI team is pleased to announce the YUI 3.0.0 beta 1 Release. This release brings the core components and utilities in the 3.x version of YUI Library to beta quality. Please review the API, play with the examples, and read the documentation on the 3.x web site for details. You can find us with questions or comments in the YUI 3.x Forum.

Please keep in mind that this is a beta release. There may still be some refactoring and select API changes made prior to the production release. Optimization will also be a focus for the team prior to the next release.

YUI 3.0.0 beta 1 is part of the broader YUI Library project, which is a coherent collection of JavaScript and CSS resources that make it easier to build richly interactive applications in web browsers. They have been released as open source under a BSD license and are free for all uses.

### Getting Started

1. Check out the examples of YUI in action. We recommend starting with the base YUI module and then moving on to Node. Other utilities like IO and Drag and Drop make for good points of exploration.
2. Remember that there are full user's guides for each component here on the website. If you have any questions about a component as you play with the examples, check out the component's user's guide (by following any of the links along the left side of the page) or the searchable API documentation.
3. Start building. Use the YUI 3 Configurator to configure a page for YUI 3 usage or base your exploration off of one of the existing examples.
4. Become a member of the YUI community. As YUI 3 moves through its preview phase, developers and community members are discussing it in the YUI 3.x Forum.

### YUI Functional Examples Included with This Download:

Along with the source code for YUI, your download includes 128 functional examples and tutorials showing YUI 3.x in action. Use the list below or the menu at left to review these YUI demos — they're the best way to get oriented to what YUI can do and to grab sample code that can help you get started. Remember that these examples and more, in addition to user's guides for each YUI component, can also be found on the YUI website (external link). (Note: Almost all examples in this distribution will work if you are browsing them from your filesystem, but some examples included here do need to be deployed on a PHP-enabled http server to function properly; if you don't have access to such a setup, just check out those examples on our website to see how they work.)

#### YUI 3 Core

- Event
- Node
- The YUI Global Object

#### YUI 3 Component Infrastructure

- Attribute
- Plugin
- Widget

#### YUI 3 Widgets

- Overlay
- Slider

#### YUI 3 Node Plugins

- Focus Manager Node Plugin
- MenuNav Node Plugin

#### YUI 3 Utilities

- Animation
- AsyncQueue
- Browser History Utility
- Cache Utility
- Cookie
- DataSchema Utility
- DataSource Utility
- DataType Utility
- Drag & Drop
- Get
- IO
- ImageLoader
- JSON
- StyleSheet

#### YUI 3 CSS Resources

- CSS Reset
- CSS Fonts
- CSS Grids
- CSS Base

#### YUI 3 Developer Tools

- Console
- Plugin.ConsoleFilters
- Profiler
- Test

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