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<h3>event <span class="subtitle">3.0.0</span></h3>
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> focusblur.js (source view)
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<div class="highlight" ><pre><span class="c">/**</span>
<span class="c"> * Adds focus and blur event listener support. These events normally</span>
<span class="c"> * do not bubble, so this adds support for that so these events</span>
<span class="c"> * can be used in event delegation scenarios.</span>
<span class="c"> * </span>
<span class="c"> * @module event</span>
<span class="c"> * @submodule event-focus</span>
<span class="c"> */</span>
<span class="o">(</span><span class="k">function</span><span class="o">()</span> <span class="o">{</span>
<span class="k">var</span> <span class="nx">UA</span> <span class="o">=</span> <span class="nx">Y</span><span class="o">.</span><span class="nx">UA</span><span class="o">,</span>
<span class="nx">Event</span> <span class="o">=</span> <span class="nx">Y</span><span class="o">.</span><span class="nx">Event</span><span class="o">,</span>
<span class="nx">plugins</span> <span class="o">=</span> <span class="nx">Y</span><span class="o">.</span><span class="nx">Env</span><span class="o">.</span><span class="nx">evt</span><span class="o">.</span><span class="nx">plugins</span><span class="o">,</span>
<span class="nx">ie</span> <span class="o">=</span> <span class="nx">UA</span><span class="o">.</span><span class="nx">ie</span><span class="o">,</span>
<span class="nx">bUseMutation</span> <span class="o">=</span> <span class="o">(</span><span class="nx">UA</span><span class="o">.</span><span class="nx">opera</span> <span class="o">||</span> <span class="nx">UA</span><span class="o">.</span><span class="nx">webkit</span><span class="o">),</span>
<span class="nx">eventNames</span> <span class="o">=</span> <span class="o">{</span>
<span class="nx">focus</span><span class="o">:</span> <span class="o">(</span><span class="nx">ie</span> <span class="o">?</span> <span class="s1">'focusin'</span> <span class="o">:</span> <span class="o">(</span><span class="nx">bUseMutation</span> <span class="o">?</span> <span class="s1">'DOMFocusIn'</span> <span class="o">:</span> <span class="s1">'focus'</span><span class="o">)),</span>
<span class="nx">blur</span><span class="o">:</span> <span class="o">(</span><span class="nx">ie</span> <span class="o">?</span> <span class="s1">'focusout'</span> <span class="o">:</span> <span class="o">(</span><span class="nx">bUseMutation</span> <span class="o">?</span> <span class="s1">'DOMFocusOut'</span> <span class="o">:</span> <span class="s1">'blur'</span><span class="o">))</span>
<span class="o">},</span>
<span class="c">// Only need to use capture phase for Gecko since it doesn't support </span>
<span class="c"></span> <span class="c">// focusin, focusout, DOMFocusIn, or DOMFocusOut</span>
<span class="c"></span> <span class="nx">CAPTURE_CONFIG</span> <span class="o">=</span> <span class="o">{</span> <span class="nx">capture</span><span class="o">:</span> <span class="o">(</span><span class="nx">UA</span><span class="o">.</span><span class="nx">gecko</span> <span class="o">?</span> <span class="kc">true</span> <span class="o">:</span> <span class="kc">false</span><span class="o">)</span> <span class="o">},</span>
<span class="nx">attach</span> <span class="o">=</span> <span class="k">function</span> <span class="o">(</span><span class="nx">args</span><span class="o">,</span> <span class="nx">config</span><span class="o">)</span> <span class="o">{</span>
<span class="k">var</span> <span class="nx">a</span> <span class="o">=</span> <span class="nx">Y</span><span class="o">.</span><span class="nb">Array</span><span class="o">(</span><span class="nx">args</span><span class="o">,</span> <span class="m">0</span><span class="o">,</span> <span class="kc">true</span><span class="o">);</span>
<span class="nx">a</span><span class="o">[</span><span class="m">0</span><span class="o">]</span> <span class="o">=</span> <span class="nx">eventNames</span><span class="o">[</span><span class="nx">a</span><span class="o">[</span><span class="m">0</span><span class="o">]];</span>
<span class="k">return</span> <span class="nx">Event</span><span class="o">.</span><span class="nx">_attach</span><span class="o">(</span><span class="nx">a</span><span class="o">,</span> <span class="nx">config</span><span class="o">);</span>
<span class="o">},</span>
<span class="nx">eventAdapter</span> <span class="o">=</span> <span class="o">{</span>
<span class="nx">on</span><span class="o">:</span> <span class="k">function</span> <span class="o">()</span> <span class="o">{</span>
<span class="k">return</span> <span class="nx">attach</span><span class="o">(</span><span class="nx">arguments</span><span class="o">,</span> <span class="nx">CAPTURE_CONFIG</span><span class="o">);</span>
<span class="o">}</span>
<span class="o">};</span>
<span class="nx">Event</span><span class="o">.</span><span class="nx">_attachFocus</span> <span class="o">=</span> <span class="nx">attach</span><span class="o">;</span>
<span class="nx">Event</span><span class="o">.</span><span class="nx">_attachBlur</span> <span class="o">=</span> <span class="nx">attach</span><span class="o">;</span>
<span class="c">/**</span>
<span class="c"> * Adds a DOM focus listener. Uses the focusin event in IE, </span>
<span class="c"> * DOMFocusIn for Opera and Webkit, and the capture phase for Gecko so that</span>
<span class="c"> * the event propagates in a way that enables event delegation.</span>
<span class="c"> *</span>
<span class="c"> * @for YUI</span>
<span class="c"> * @event focus</span>
<span class="c"> * @param type {string} 'focus'</span>
<span class="c"> * @param fn {function} the callback function to execute</span>
<span class="c"> * @param o {string|HTMLElement|collection} the element(s) to bind</span>
<span class="c"> * @param context optional context object</span>
<span class="c"> * @param args 0..n additional arguments to provide to the listener.</span>
<span class="c"> * @return {EventHandle} the detach handle</span>
<span class="c"> */</span>
<span class="nx">plugins</span><span class="o">.</span><span class="nx">focus</span> <span class="o">=</span> <span class="nx">eventAdapter</span><span class="o">;</span>
<span class="c">/**</span>
<span class="c"> * Adds a DOM blur listener. Uses the focusout event in IE, </span>
<span class="c"> * DOMFocusOut for Opera and Webkit, and the capture phase for Gecko so that</span>
<span class="c"> * the event propagates in a way that enables event delegation.</span>
<span class="c"> *</span>
<span class="c"> * @for YUI</span>
<span class="c"> * @event blur</span>
<span class="c"> * @param type {string} 'blur'</span>
<span class="c"> * @param fn {function} the callback function to execute</span>
<span class="c"> * @param o {string|HTMLElement|collection} the element(s) to bind</span>
<span class="c"> * @param context optional context object</span>
<span class="c"> * @param args 0..n additional arguments to provide to the listener.</span>
<span class="c"> * @return {EventHandle} the detach handle</span>
<span class="c"> */</span>
<span class="nx">plugins</span><span class="o">.</span><span class="nx">blur</span> <span class="o">=</span> <span class="nx">eventAdapter</span><span class="o">;</span>
<span class="o">})();</span>
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