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2 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> |
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4 <head> |
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5 <title>YUI Library Examples: Node: Node Basics</title> |
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27 <em> |
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28 <a href="http://developer.yahoo.com/yui/3/">YUI 3.x Home</a> <i> - </i> |
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40 </div> |
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41 <div id="ygma"><a href="../../"><img src="../../assets/logo.gif" border="0" width="200" height="93"></a></div> |
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42 <div id="pagetitle"><h1>YUI Library Examples: Node: Node Basics</h1></div> |
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43 </div> |
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44 <div id="bd"> |
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45 |
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46 <div id="bar-note"><p><strong>Note:</strong> This is YUI 3.x. Looking for <a href="http://developer.yahoo.com/yui/">YUI 2.x</a>?</p></div> |
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47 |
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48 <div id="yui-main"> |
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49 <div class="yui-b"> |
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50 <div class="yui-ge"> |
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51 <div class="yui-u first example" id="main"> |
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52 |
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53 <h2>Node: Node Basics</h2> |
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54 |
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55 <div id="example" class="promo"> |
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56 <p> |
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57 <p>This example demonstrates how to <code>get</code> and use a <code>Node</code> instance to access DOM properties.</p> |
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58 <p>Click the box to update the content of with the <code>tagName</code> of the click target's <code>parentNode</code>.</p> |
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59 </p> |
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60 |
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61 <div class="module example-container "> |
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62 <div class="hd exampleHd"> |
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63 <p class="newWindowButton yui-skin-sam"> |
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64 <a href="basic-node_clean.html" target="_blank">View example in new window.</a> |
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65 </p> |
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66 </div> <div id="example-canvas" class="bd"> |
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67 |
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68 |
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69 <!--BEGIN SOURCE CODE FOR EXAMPLE =============================== --> |
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70 |
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71 <div id="demo"> |
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72 <p><em>Click me.</em></p> |
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73 </div> |
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74 |
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75 <script type="text/javascript"> |
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76 YUI({base:"../../build/", timeout: 10000}).use("node", function(Y) { |
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77 var node = Y.get('#demo p'); |
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78 |
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79 var onClick = function(e) { |
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80 var tag = e.target.get('parentNode.tagName'); // e.target === node || #demo p em |
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81 e.currentTarget.query('em').setContent('I am a child of ' + tag + '.'); // e.currentTarget === node |
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82 }; |
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83 |
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84 node.on('click', onClick); |
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85 }); |
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86 |
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87 </script> |
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88 |
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89 <!--END SOURCE CODE FOR EXAMPLE =============================== --> |
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90 |
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91 |
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92 </div> |
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93 </div> |
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94 </div> |
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95 |
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96 <h3>Setting up the HTML</h3> |
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97 <p>First we need some HTML to work with.</p> |
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98 <textarea name="code" class="HTML"> |
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99 <div id="demo"> |
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100 <p><em>Whose child am I?</em></p> |
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101 </div> |
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102 </textarea> |
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103 |
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104 <h3>Geting a Node Instance</h3> |
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105 <p>We will get our <code>Node</code> instance using the <code>get</code> method of our YUI instance which accepts either an HTMLElement or a Selector string.</p> |
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106 <textarea name="code" class="JScript"> |
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107 var node = Y.get('#demo p'); |
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108 </textarea> |
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109 |
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110 <h3>Accessing Node Properties</h3> |
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111 <p>The properties of a node can be accessed via its <code>set</code> and <code>get</code> methods.</p> |
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112 <p>In most cases, simple type of properties (strings, numbers, booleans) pass directly to/from the underlying DOM node, however properties representing other DOM nodes return <code>Node</code> or <code>NodeList</code> instances.</p> |
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113 <p>A <code>click</code> handler will allow us to update the content of our node with the <code>tagName</code> of its <code>parentNode</code>.</p> |
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114 <p>Note that the <code>target</code> of the event object will vary depending on where you click. The <code>currentTarget</code> of the event will always be the element that assigned the listener (the <code>P</code> element in this case).</p> |
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115 <textarea name="code" class="JScript"> |
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116 onClick = function(e) { |
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117 var tag = e.target.get('parentNode.tagName'); // e.target === node || #demo p em |
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118 e.currentTarget.setContent('I am a child of ' + tag + '.'); // e.currentTarget === node |
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119 }; |
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120 |
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121 </textarea> |
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122 |
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123 <h3>Listening for Node Events</h3> |
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124 <p>We will update the node when the <code>click</code> event fires by using the <code>on</code> method to subscribe to the event.</p> |
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125 <textarea name="code" class="JScript"> |
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126 node.on('click', onClick); |
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127 </textarea> |
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128 |
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129 <h3>Full Script Source</h3> |
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130 <textarea name="code" class="JScript"> |
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131 YUI().use('node', function(Y) { |
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132 var node = Y.get('#demo p'); |
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133 |
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134 var onClick = function(e) { |
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135 var tag = e.target.get('parentNode.tagName'); // e.target === node || #demo p em |
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136 e.currentTarget.setContent('I am a child of ' + tag + '.'); // e.currentTarget === node |
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137 }; |
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138 |
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139 node.on('click', onClick); |
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140 }); |
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141 </textarea> |
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142 </div> |
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143 <div class="yui-u sidebar"> |
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144 |
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145 |
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146 <div id="examples" class="mod box4"> |
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147 <div class="hd"> |
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148 <h4> |
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149 Node Examples:</h4> |
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150 </div> |
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151 <div class="bd"> |
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152 <ul> |
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153 <li class='selected'><a href='../node/basic-node.html'>Node Basics</a></li><li><a href='../node/dom-node.html'>DOM Methods</a></li><li><a href='../node/event-node.html'>NodeList Events</a></li><li><a href='../node/nodelist.html'>NodeList</a></li><li><a href='../node/node-evt-delegation.html'>Delegating Node Events</a></li><li><a href='../node/node-screen.html'>Measuring the Window and Document</a></li><li><a href='../node/node-xy.html'>Node Positioning</a></li><li><a href='../node/node-style.html'>Node Styling</a></li><li><a href='../node/node-insert.html'>Adding Node Content</a></li><li><a href='../node/node-change.html'>Using Node Change Events</a></li><li><a href='../node-focusmanager/node-focusmanager-3.html'>Accessible Menu Button (included with examples for Focus Manager Node Plugin)</a></li><li><a href='../node-focusmanager/node-focusmanager-2.html'>Accessible TabView (included with examples for Focus Manager Node Plugin)</a></li><li><a href='../node-focusmanager/node-focusmanager-1.html'>Accessible Toolbar (included with examples for Focus Manager Node Plugin)</a></li><li><a href='../attribute/attribute-getset.html'>Getters, Setters and Validators (included with examples for Attribute)</a></li><li><a href='../dd/photo-browser.html'>Photo Browser (included with examples for Drag & Drop)</a></li> </ul> |
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154 </div> |
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155 </div> |
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156 |
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157 <div class="mod box4"> |
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158 <div class="hd"> |
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159 <h4>More Node Resources:</h4> |
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160 </div> |
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161 <div class="bd"> |
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162 <ul> |
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163 <!-- <li><a href="http://developer.yahoo.com/yui/node/">User's Guide</a> (external)</li> --> |
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164 <li><a href="../../api/module_node.html">API Documentation</a></li> |
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165 </ul> |
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166 </div> |
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167 </div> |
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168 </div> |
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169 </div> |
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170 |
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171 </div> |
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172 </div> |
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173 |
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174 |
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175 <div class="yui-b toc3" id="tocWrapper"> |
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176 <!-- TABLE OF CONTENTS --> |
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177 <div id="toc"> |
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178 |
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179 <ul> |
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180 <li class="sect first">YUI 3.x Project</li><li class="item"><a title="The Yahoo! User Interface (YUI) Library, 3.x Branch, " href="http://developer.yahoo.com/yui/3/">YUI 3 Web Site (external)</a></li><li class="item"><a title="Examples of every YUI utility and control in action" href="../../examples/">YUI 3 Examples</a></li><li class="item"><a title="Instantly searchable API documentation for the entire YUI library." href="../../api/">YUI 3 API Docs</a></li><li class="item"><a title="The YUI Library can be downloaded from SourceForge" href="http://sourceforge.net/projects/yui/">YUI 3 on Sourceforge (external)</a></li><li class="item"><a title="YUI is free and open, offered under a BSD license." href="http://developer.yahoo.com/yui/3/license.html">YUI License (external)</a></li><li class="sect">YUI 3 Core - Examples</li><li class="item"><a title="YUI (Global Prerequisite) - Functional Examples" href="../../examples/yui/index.html">YUI (Global Prerequisite)</a></li><li class="item"><a title="Event - Functional Examples" href="../../examples/event/index.html">Event</a></li><li class="selected "><a title="Node - Functional Examples" href="../../examples/node/index.html">Node</a></li><li class="sect">YUI 3 Component Infrastructure - Examples</li><li class="item"><a title="Attribute - Functional Examples" href="../../examples/attribute/index.html">Attribute</a></li><li class="item"><a title="Plugin - Functional Examples" href="../../examples/plugin/index.html">Plugin</a></li><li class="item"><a title="Widget - Functional Examples" href="../../examples/widget/index.html">Widget</a></li><li class="sect">YUI 3 Utilities - Examples</li><li class="item"><a title="Animation - Functional Examples" href="../../examples/anim/index.html">Animation</a></li><li class="item"><a title="Cache - Functional Examples" href="../../examples/cache/index.html">Cache</a></li><li class="item"><a title="Cookie - Functional Examples" href="../../examples/cookie/index.html">Cookie</a></li><li class="item"><a title="DataSchema - Functional Examples" href="../../examples/dataschema/index.html">DataSchema</a></li><li class="item"><a title="DataSource - Functional Examples" href="../../examples/datasource/index.html">DataSource</a></li><li class="item"><a title="DataType - Functional Examples" href="../../examples/datatype/index.html">DataType</a></li><li class="item"><a title="Drag & Drop - Functional Examples" href="../../examples/dd/index.html">Drag & Drop</a></li><li class="item"><a title="Get - Functional Examples" href="../../examples/get/index.html">Get</a></li><li class="item"><a title="History - Functional Examples" href="../../examples/history/index.html">History</a></li><li class="item"><a title="ImageLoader - Functional Examples" href="../../examples/imageloader/index.html">ImageLoader</a></li><li class="item"><a title="IO - Functional Examples" href="../../examples/io/index.html">IO</a></li><li class="item"><a title="JSON (JavaScript Object Notation) - Functional Examples" href="../../examples/json/index.html">JSON</a></li><li class="item"><a title="Queue - Functional Examples" href="../../examples/queue/index.html">Queue</a></li><li class="item"><a title="Stylesheet - Functional Examples" href="../../examples/stylesheet/index.html">Stylesheet</a></li><li class="sect">YUI 3 Widgets - Examples</li><li class="item"><a title="Overlay - Functional Examples" href="../../examples/overlay/index.html">Overlay</a></li><li class="item"><a title="Slider - Functional Examples" href="../../examples/slider/index.html">Slider</a></li><li class="sect">YUI 3 Node Plugins - Examples</li><li class="item"><a title="FocusManager Node Plugin - Functional Examples" href="../../examples/node-focusmanager/index.html">FocusManager Node Plugin</a></li><li class="item"><a title="MenuNav Node Plugin - Functional Examples" href="../../examples/node-menunav/index.html">MenuNav Node Plugin</a></li><li class="sect">YUI 3 CSS - Examples</li><li class="item"><a title="YUI CSS Reset - Functional Examples" href="../../examples/cssreset/index.html">CSS Reset</a></li><li class="item"><a title="YUI Fonts - Functional Examples" href="../../examples/cssfonts/index.html">CSS Fonts</a></li><li class="item"><a title="YUI Base - Functional Examples" href="../../examples/cssbase/index.html">CSS Base</a></li><li class="sect">YUI 3 Developer Tools - Examples</li><li class="item"><a title="Console - Functional Examples" href="../../examples/console/index.html">Console</a></li><li class="item"><a title="Profiler - Functional Examples" href="../../examples/profiler/index.html">Profiler</a></li><li class="item"><a title="Test - Functional Examples" href="../../examples/test/index.html">Test</a></li><li class="sect">The YUI Community</li><li class="item"><a title="The Yahoo! User Interface Blog" href="http://yuiblog.com">YUI Blog (external)</a></li><li class="item"><a title="The Yahoo! Group YDN-JavaScript hosts the YUI community forum" href="http://tech.groups.yahoo.com/group/ydn-javascript/">YUI Forum (external)</a></li><li class="item"><a title="The Yahoo! Group yui3 is dedicated to the 3.x branch of the Yahoo! 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