YUI Library

<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>YUI Library</title> <meta name="viewport" content="width=960" id="meta-viewport"> <script> if (screen.width < 768) { document.getElementById('meta-viewport').setAttribute('content', 'width=768'); } </script> <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=PT+Sans:400,700,400italic,700italic"> <link rel="stylesheet" href="https://yui-s.yahooapis.com/3.9.0/build/cssgrids/cssgrids-min.css"> <link rel="stylesheet" href="/yui3/combo/css-main-min.css-home-min.css"> <meta http-equiv="X-UA-Compatible" content="IE=Edge,chrome=1"> <meta http-equiv="X-XRDS-Location" content="/xrds.xml"> <link rel="shortcut icon" type="image/png" href="/yui3/img/favicon.png"> <script> var _gaq = _gaq || []; _gaq.push(['_setAccount', 'UA-29453705-2']); _gaq.push(['_trackPageview']); </script> <script> var YUI_config={"filter":"min","maxURLLength":1024,"root":"3.18.1/","groups":{"site":{"combine":true,"comboBase":"/combo/js?","root":"","modules":{"hoverable":{"path":"hoverable-min.js","requires":["event-hover","node-base","node-event-delegate"]},"search":{"path":"search-min.js","requires":["autocomplete","autocomplete-highlighters","node-pluginhost"]},"api-filter":{"path":"apidocs/api-filter-min.js","requires":["autocomplete-base","autocomplete-highlighters","autocomplete-sources"]},"api-list":{"path":"apidocs/api-list-min.js","requires":["api-filter","api-search","event-key","node-focusmanager","tabview"]},"api-search":{"path":"apidocs/api-search-min.js","requires":["autocomplete-base","autocomplete-highlighters","autocomplete-sources","escape"]}}}}}; if (location.protocol.indexOf('https') > -1) { YUI_config.comboBase = 'https://yui-s.yahooapis.com/combo?'; YUI_config.combine = true; } </script> <script src="https://yui-s.yahooapis.com/3.18.1/build/yui/yui-min.js"></script> </head> <body class="yui3-skin-sam">  <div id="doc"> <div id="hd" class="yui3-g"><header> <div class="content"> <div class="yui3-u-3-4"> <a href="/yui3" rel="home"><div id="hd-logo" role="image" aria-label="YUI logo"></div></a> </div> <div class="yui3-u-1-4"> <form id="main-search" class="search" action="https://search.yahoo.com/search" method="get" role="search"> <input type="search" class="search-input" name="q" aria-label="Search APIs" placeholder="Search APIs"> <input type="hidden" name="vs" value="yuilibrary.com"> <input type="hidden" name="vs" value="yuiblog.com"> </form> </div> <div id="main-nav" class="yui3-u"><nav> <ul class="nav hoverable-group"> <li class="nav-tab hoverable nav-tab-active"> <a href="/yui3">Home</a> </li> <li class="nav-tab hoverable "> <a href="https://github.com/yui/yui3/wiki/Quick-Start">Quick Start</a> <ul class="nav-submenu"> <li class="nav-child "> <a href="/download/yui3/">Download YUI 3</a> </li> </ul> </li> <li class="nav-tab hoverable "> <a href="https://github.com/yui/yui3/wiki/YUI-Documentation">Documentation</a> <ul class="nav-submenu"> <li class="nav-child "> <a href="/yui3/yui/docs/guides/">User Guides</a> </li> <li class="nav-child "> <a href="/yui3/yui/docs/examples/">Examples</a> </li> <li class="nav-child "> <a href="/yui3/yui/docs/api/">API Docs</a> </li> <li class="nav-child "> <a href="/yui3/yui/environments/">Environments</a> </li> <li class="nav-child "> <a href="/yui3/yui/docs/tutorials/">Tutorials</a> </li> <li class="nav-child "> <a href="/yui3/yui/docs/tutorials/faq/">FAQ</a> </li> </ul> </li> <li class="nav-tab hoverable nav-break"> <a href="/community/">Community</a> <ul class="nav-submenu"> <li class="nav-child "> <a href="/gallery/">Gallery</a> </li> <li class="nav-child "> <a href="http://yuiblog.com/">Blog</a> </li> <li class="nav-child "> <a href="/forum/">Forums</a> </li> <li class="nav-child "> <a href="/theater/">YUI Theater</a> </li> </ul> </li> <li class="nav-tab hoverable "> <a href="/projects/">Other Projects</a> <ul class="nav-submenu"> <li class="nav-child "> <a href="http://yui.github.com/shifter/" target="_blank" title="External link">Shifter »</a> </li> <li class="nav-child "> <a href="http://yui.github.com/yogi/" target="_blank" title="External link">Yogi »</a> </li> <li class="nav-child "> <a href="/projects/yui2/">YUI 2</a> </li> <li class="nav-child "> <a href="http://yui.github.com/yuidoc/" target="_blank" title="External link">YUI Doc »</a> </li> <li class="nav-child "> <a href="/projects/yuitest/">YUI Test</a> </li> <li class="nav-child "> <a href="http://yui.github.com/yuicompressor/" target="_blank" title="External link">YUI Compressor »</a> </li> <li class="nav-child "> <a href="http://github.com/yui/builder" target="_blank" title="External link">YUI Builder »</a> </li> <li class="nav-child "> <a href="/projects/phploader/">YUI PHP Loader</a> </li> <li class="nav-child "> <a href="http://yui.github.com/gridbuilder/" target="_blank" title="External link">Grid Builder »</a> </li> <li class="nav-child "> <a href="http://yui.github.com/skinbuilder/" target="_blank" title="External link">Skin Builder »</a> </li> </ul> </li> </ul> </nav></div> </div> </header></div> <div id="bd" class="clearfix yui3-g"> <div id="deprecated" class="yui3-u-1 notice"> <p>IMPORTANT: The YUI library is no longer actively maintained. Please see this <a href="http://yahooeng.tumblr.com/post/96098168666/important-announcement-regarding-yui/">announcement</a> for more information.</p> </div> <div class="yui3-u-1"> <div class="content"> <div class="intro"> <p class="headline"> YUI is a free, open source JavaScript and CSS library for building richly interactive web applications. </p> <p> <a href="https://github.com/yui/yui3/wiki/Quick-Start" class="button get-started"> Get Started <span class="extra"> Start using YUI 3.18.1 in two easy steps. </span> </a> </p> </div> <div class="divider"> <hr> <h2>Why YUI?</h2> </div> <div class="yui3-g"> <div id="reasons" class="reasons"> <div class="yui3-u-1-4"> <div class="reason"> <h3>Fast</h3> <p>YUI's lightweight core and <a href="/yui3/yui/docs/guides">modular architecture</a> make it scalable, fast, and robust. Built by frontend engineers at Yahoo!, YUI powers the most popular websites in the world.</p> </div> </div> <div class="yui3-u-1-4"> <div class="reason"> <h3>Complete</h3> <p>YUI's <a href="https://github.com/yui/yui3/wiki/YUI-Documentation">intuitive and well-documented API</a> takes you from basic DOM handling to building performant and maintainable applications on desktop browsers, mobile devices, and servers.</p> </div> </div> <div class="yui3-u-1-4"> <div class="reason"> <h3>Industrial Strength</h3> <p>A <a href="/community/">thriving community</a>, a carefully architected infrastructure, and a comprehensive suite of tools help you code like a pro, from simple web pages to complex web applications.</p> </div> </div> <div class="yui3-u-1-4"> <div class="reason"> <h3>Free & Open</h3> <p>YUI is <a href="/license/">free for all uses</a> and is <a href="https://github.com/yui">developed in the open</a> on GitHub. Core team members can always be found in the <a href="/forum/">forums</a> and the <a href="irc://irc.freenode.net#yui">#yui</a> IRC channel on <a href="http://freenode.net/">Freenode</a>. Pull requests welcome!</p> </div> </div> </div> </div> <div class="divider"> <hr> <h2>A Few <a href="/yui3/yui/docs/examples/">Examples</a></h2> </div> <div class="examples-showcase"> <div class="yui3-g"> <ul class="examples"> <li class="yui3-u-1-3"> <div class="example-item"> <h3 class="example-title"><a href="/yui3/yui/docs/dial/dial-interactive.html">Dial with Interactive UI</a></h3> <a href="/yui3/yui/docs/dial/dial-interactive.html"><img src="/yui3/img/home/example-dial-interactive.jpg" alt="Screenshot of a Dial widget." class="hover-border"></a> </div> </li> <li class="yui3-u-1-3"> <div class="example-item"> <h3 class="example-title"><a href="/yui3/yui/docs/cssgrids/cssgrids-units.html">CSS Grids: Using Grid Units</a></h3> <a href="/yui3/yui/docs/cssgrids/cssgrids-units.html"><img src="/yui3/img/home/example-grids.png" alt="Screenshot of a page layout using CSS grids." class="hover-border"></a> </div> </li> <li class="yui3-u-1-3"> <div class="example-item"> <h3 class="example-title"><a href="/yui3/yui/docs/dd/groups-drag.html">Drag & Drop: Interaction Groups</a></h3> <a href="/yui3/yui/docs/dd/groups-drag.html"><img src="/yui3/img/home/example-dd.png" alt="Screenshot of a mouse cursor dragging a box onto a drop target." class="hover-border"></a> </div> </li> </ul> </div> </div> <div class="yui3-g"> <div class="yui3-u-2-3"> <div class="column-left"> <div class="divider"> <hr> <h2><a href="http://youtube.com/yuilibrary/">YUI Theater</a> Videos</h2> </div> <div class="theater"> <p class="youtube-link"> <a class="button" href="http://youtube.com/yuilibrary"> <img src="/yui3/img/misc/youtube-small.png" alt="YouTube icon" class="youtube-icon"> YUI Theater on YouTube </a> </p> </div> </div> </div> <div class="yui3-u-1-3"> <div class="column-right"> <div class="divider"> <hr> <h2><a href="http://twitter.com/yuilibrary">@yuilibrary</a> on Twitter</h2> </div> <div class="twitter"> <p class="twitter-link"> <a class="button" href="http://twitter.com/yuilibrary"> <img src="/yui3/img/misc/twitter-small.png" alt="Twitter icon" class="twitter-icon"> Follow YUI on Twitter </a> </p> </div> </div> </div> </div> </div> </div> </div> <div id="ft"><footer> <p class="copyright"> All code on this site is licensed under the <a href="/license/">BSD License</a> unless stated otherwise.<br> <span class="links"><a href="/security/">Security Contact Info</a></span> </p> </footer></div> </div> <script src="/yui3/combo/js-search-min.js-hoverable-min.js-main-min.js"></script> <script> (function() { var ga = document.createElement('script'); ga.async = true; ga.src = ('https:' == document.location.protocol ? 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YUI Library