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<h3>event <span class="subtitle">3.0.0</span></h3>
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<div class="highlight" ><pre><span class="o">(</span><span class="k">function</span><span class="o">()</span> <span class="o">{</span>
<span class="c">/**</span>
<span class="c"> * Custom event engine, DOM event listener abstraction layer, synthetic DOM </span>
<span class="c"> * events.</span>
<span class="c"> * @module event</span>
<span class="c"> * @submodule event-base</span>
<span class="c"> */</span>
<span class="c">/**</span>
<span class="c"> * Wraps a DOM event, properties requiring browser abstraction are</span>
<span class="c"> * fixed here. Provids a security layer when required.</span>
<span class="c"> * @class DOMEventFacade</span>
<span class="c"> * @param ev {Event} the DOM event</span>
<span class="c"> * @param currentTarget {HTMLElement} the element the listener was attached to</span>
<span class="c"> * @param wrapper {Event.Custom} the custom event wrapper for this DOM event</span>
<span class="c"> */</span>
<span class="c">/*</span>
<span class="c"> * @TODO constants? LEFTBUTTON, MIDDLEBUTTON, RIGHTBUTTON, keys</span>
<span class="c"> */</span>
<span class="c">/*</span>
<span class="c"></span>
<span class="c">var whitelist = {</span>
<span class="c"> altKey : 1,</span>
<span class="c"> // "button" : 1, // we supply</span>
<span class="c"> // "bubbles" : 1, // needed?</span>
<span class="c"> // "cancelable" : 1, // needed? </span>
<span class="c"> // "charCode" : 1, // we supply</span>
<span class="c"> cancelBubble : 1,</span>
<span class="c"> // "currentTarget" : 1, // we supply</span>
<span class="c"> ctrlKey : 1,</span>
<span class="c"> clientX : 1, // needed?</span>
<span class="c"> clientY : 1, // needed?</span>
<span class="c"> detail : 1, // not fully implemented</span>
<span class="c"> // "fromElement" : 1,</span>
<span class="c"> keyCode : 1,</span>
<span class="c"> // "height" : 1, // needed?</span>
<span class="c"> // "initEvent" : 1, // need the init events?</span>
<span class="c"> // "initMouseEvent" : 1,</span>
<span class="c"> // "initUIEvent" : 1,</span>
<span class="c"> // "layerX" : 1, // needed?</span>
<span class="c"> // "layerY" : 1, // needed?</span>
<span class="c"> metaKey : 1,</span>
<span class="c"> // "modifiers" : 1, // needed?</span>
<span class="c"> // "offsetX" : 1, // needed?</span>
<span class="c"> // "offsetY" : 1, // needed?</span>
<span class="c"> // "preventDefault" : 1, // we supply</span>
<span class="c"> // "reason" : 1, // IE proprietary</span>
<span class="c"> // "relatedTarget" : 1,</span>
<span class="c"> // "returnValue" : 1, // needed?</span>
<span class="c"> shiftKey : 1,</span>
<span class="c"> // "srcUrn" : 1, // IE proprietary</span>
<span class="c"> // "srcElement" : 1,</span>
<span class="c"> // "srcFilter" : 1, IE proprietary</span>
<span class="c"> // "stopPropagation" : 1, // we supply</span>
<span class="c"> // "target" : 1,</span>
<span class="c"> // "timeStamp" : 1, // needed?</span>
<span class="c"> // "toElement" : 1,</span>
<span class="c"> type : 1,</span>
<span class="c"> // "view" : 1,</span>
<span class="c"> // "which" : 1, // we supply</span>
<span class="c"> // "width" : 1, // needed?</span>
<span class="c"> x : 1,</span>
<span class="c"> y : 1</span>
<span class="c">},</span>
<span class="c"></span>
<span class="c">*/</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="c">/**</span>
<span class="c"> * webkit key remapping required for Safari < 3.1</span>
<span class="c"> * @property webkitKeymap</span>
<span class="c"> * @private</span>
<span class="c"> */</span>
<span class="nx">webkitKeymap</span> <span class="o">=</span> <span class="o">{</span>
<span class="m">63232</span><span class="o">:</span> <span class="m">38</span><span class="o">,</span> <span class="c">// up</span>
<span class="c"></span> <span class="m">63233</span><span class="o">:</span> <span class="m">40</span><span class="o">,</span> <span class="c">// down</span>
<span class="c"></span> <span class="m">63234</span><span class="o">:</span> <span class="m">37</span><span class="o">,</span> <span class="c">// left</span>
<span class="c"></span> <span class="m">63235</span><span class="o">:</span> <span class="m">39</span><span class="o">,</span> <span class="c">// right</span>
<span class="c"></span> <span class="m">63276</span><span class="o">:</span> <span class="m">33</span><span class="o">,</span> <span class="c">// page up</span>
<span class="c"></span> <span class="m">63277</span><span class="o">:</span> <span class="m">34</span><span class="o">,</span> <span class="c">// page down</span>
<span class="c"></span> <span class="m">25</span><span class="o">:</span> <span class="m">9</span><span class="o">,</span> <span class="c">// SHIFT-TAB (Safari provides a different key code in</span>
<span class="c"></span> <span class="c">// this case, even though the shiftKey modifier is set)</span>
<span class="c"></span> <span class="m">63272</span><span class="o">:</span> <span class="m">46</span><span class="o">,</span> <span class="c">// delete</span>
<span class="c"></span> <span class="m">63273</span><span class="o">:</span> <span class="m">36</span><span class="o">,</span> <span class="c">// home</span>
<span class="c"></span> <span class="m">63275</span><span class="o">:</span> <span class="m">35</span> <span class="c">// end</span>
<span class="c"></span> <span class="o">},</span>
<span class="c">/**</span>
<span class="c"> * Returns a wrapped node. Intended to be used on event targets,</span>
<span class="c"> * so it will return the node's parent if the target is a text</span>
<span class="c"> * node.</span>
<span class="c"> *</span>
<span class="c"> * If accessing a property of the node throws an error, this is</span>
<span class="c"> * probably the anonymous div wrapper Gecko adds inside text</span>
<span class="c"> * nodes. This likely will only occur when attempting to access</span>
<span class="c"> * the relatedTarget. In this case, we now return null because</span>
<span class="c"> * the anonymous div is completely useless and we do not know</span>
<span class="c"> * what the related target was because we can't even get to</span>
<span class="c"> * the element's parent node.</span>
<span class="c"> *</span>
<span class="c"> * @method resolve</span>
<span class="c"> * @private</span>
<span class="c"> */</span>
<span class="nx">resolve</span> <span class="o">=</span> <span class="k">function</span><span class="o">(</span><span class="nx">n</span><span class="o">)</span> <span class="o">{</span>
<span class="k">try</span> <span class="o">{</span>
<span class="k">if</span> <span class="o">(</span><span class="nx">n</span> <span class="o">&&</span> <span class="m">3</span> <span class="o">==</span> <span class="nx">n</span><span class="o">.</span><span class="nx">nodeType</span><span class="o">)</span> <span class="o">{</span>
<span class="nx">n</span> <span class="o">=</span> <span class="nx">n</span><span class="o">.</span><span class="nx">parentNode</span><span class="o">;</span>
<span class="o">}</span>
<span class="o">}</span> <span class="k">catch</span><span class="o">(</span><span class="nx">e</span><span class="o">)</span> <span class="o">{</span>
<span class="k">return</span> <span class="kc">null</span><span class="o">;</span>
<span class="o">}</span>
<span class="k">return</span> <span class="nx">Y</span><span class="o">.</span><span class="nx">one</span><span class="o">(</span><span class="nx">n</span><span class="o">);</span>
<span class="o">};</span>
<span class="c">// provide a single event with browser abstractions resolved</span>
<span class="c">//</span>
<span class="c">// include all properties for both browers?</span>
<span class="c">// include only DOM2 spec properties?</span>
<span class="c">// provide browser-specific facade?</span>
<span class="c"></span>
<span class="nx">Y</span><span class="o">.</span><span class="nx">DOMEventFacade</span> <span class="o">=</span> <span class="k">function</span><span class="o">(</span><span class="nx">ev</span><span class="o">,</span> <span class="nx">currentTarget</span><span class="o">,</span> <span class="nx">wrapper</span><span class="o">)</span> <span class="o">{</span>
<span class="nx">wrapper</span> <span class="o">=</span> <span class="nx">wrapper</span> <span class="o">||</span> <span class="o">{};</span>
<span class="k">var</span> <span class="nx">e</span> <span class="o">=</span> <span class="nx">ev</span><span class="o">,</span> <span class="nx">ot</span> <span class="o">=</span> <span class="nx">currentTarget</span><span class="o">,</span> <span class="nx">d</span> <span class="o">=</span> <span class="nx">Y</span><span class="o">.</span><span class="nx">config</span><span class="o">.</span><span class="nx">doc</span><span class="o">,</span> <span class="nx">b</span> <span class="o">=</span> <span class="nx">d</span><span class="o">.</span><span class="nx">body</span><span class="o">,</span>
<span class="nx">x</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">pageX</span><span class="o">,</span> <span class="nx">y</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">pageY</span><span class="o">,</span> <span class="nx">c</span><span class="o">,</span> <span class="nx">t</span><span class="o">;</span>
<span class="k">this</span><span class="o">.</span><span class="nx">altKey</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">altKey</span><span class="o">;</span>
<span class="k">this</span><span class="o">.</span><span class="nx">ctrlKey</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">ctrlKey</span><span class="o">;</span>
<span class="k">this</span><span class="o">.</span><span class="nx">metaKey</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">metaKey</span><span class="o">;</span>
<span class="k">this</span><span class="o">.</span><span class="nx">shiftKey</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">shiftKey</span><span class="o">;</span>
<span class="k">this</span><span class="o">.</span><span class="nx">type</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">type</span><span class="o">;</span>
<span class="k">this</span><span class="o">.</span><span class="nx">clientX</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">clientX</span><span class="o">;</span>
<span class="k">this</span><span class="o">.</span><span class="nx">clientY</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">clientY</span><span class="o">;</span>
<span class="c">//////////////////////////////////////////////////////</span>
<span class="c"></span>
<span class="k">if</span> <span class="o">(!</span><span class="nx">x</span> <span class="o">&&</span> <span class="m">0</span> <span class="o">!==</span> <span class="nx">x</span><span class="o">)</span> <span class="o">{</span>
<span class="nx">x</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">clientX</span> <span class="o">||</span> <span class="m">0</span><span class="o">;</span>
<span class="nx">y</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">clientY</span> <span class="o">||</span> <span class="m">0</span><span class="o">;</span>
<span class="k">if</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="o">{</span>
<span class="nx">x</span> <span class="o">+=</span> <span class="nb">Math</span><span class="o">.</span><span class="nx">max</span><span class="o">(</span><span class="nx">d</span><span class="o">.</span><span class="nx">documentElement</span><span class="o">.</span><span class="nx">scrollLeft</span><span class="o">,</span> <span class="nx">b</span><span class="o">.</span><span class="nx">scrollLeft</span><span class="o">);</span>
<span class="nx">y</span> <span class="o">+=</span> <span class="nb">Math</span><span class="o">.</span><span class="nx">max</span><span class="o">(</span><span class="nx">d</span><span class="o">.</span><span class="nx">documentElement</span><span class="o">.</span><span class="nx">scrollTop</span><span class="o">,</span> <span class="nx">b</span><span class="o">.</span><span class="nx">scrollTop</span><span class="o">);</span>
<span class="o">}</span>
<span class="o">}</span>
<span class="k">this</span><span class="o">.</span><span class="nx">_yuifacade</span> <span class="o">=</span> <span class="kc">true</span><span class="o">;</span>
<span class="c">/**</span>
<span class="c"> * The native event</span>
<span class="c"> * @property _event</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">_event</span> <span class="o">=</span> <span class="nx">e</span><span class="o">;</span>
<span class="c">/**</span>
<span class="c"> * The X location of the event on the page (including scroll)</span>
<span class="c"> * @property pageX</span>
<span class="c"> * @type int</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">pageX</span> <span class="o">=</span> <span class="nx">x</span><span class="o">;</span>
<span class="c">/**</span>
<span class="c"> * The Y location of the event on the page (including scroll)</span>
<span class="c"> * @property pageY</span>
<span class="c"> * @type int</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">pageY</span> <span class="o">=</span> <span class="nx">y</span><span class="o">;</span>
<span class="c">//////////////////////////////////////////////////////</span>
<span class="c"></span>
<span class="nx">c</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">keyCode</span> <span class="o">||</span> <span class="nx">e</span><span class="o">.</span><span class="nx">charCode</span> <span class="o">||</span> <span class="m">0</span><span class="o">;</span>
<span class="k">if</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="o">(</span><span class="nx">c</span> <span class="k">in</span> <span class="nx">webkitKeymap</span><span class="o">))</span> <span class="o">{</span>
<span class="nx">c</span> <span class="o">=</span> <span class="nx">webkitKeymap</span><span class="o">[</span><span class="nx">c</span><span class="o">];</span>
<span class="o">}</span>
<span class="c">/**</span>
<span class="c"> * The keyCode for key events. Uses charCode if keyCode is not available</span>
<span class="c"> * @property keyCode</span>
<span class="c"> * @type int</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">keyCode</span> <span class="o">=</span> <span class="nx">c</span><span class="o">;</span>
<span class="c">/**</span>
<span class="c"> * The charCode for key events. Same as keyCode</span>
<span class="c"> * @property charCode</span>
<span class="c"> * @type int</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">charCode</span> <span class="o">=</span> <span class="nx">c</span><span class="o">;</span>
<span class="c">//////////////////////////////////////////////////////</span>
<span class="c"></span>
<span class="c">/**</span>
<span class="c"> * The button that was pushed.</span>
<span class="c"> * @property button</span>
<span class="c"> * @type int</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">button</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">which</span> <span class="o">||</span> <span class="nx">e</span><span class="o">.</span><span class="nx">button</span><span class="o">;</span>
<span class="c">/**</span>
<span class="c"> * The button that was pushed. Same as button.</span>
<span class="c"> * @property which</span>
<span class="c"> * @type int</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">which</span> <span class="o">=</span> <span class="k">this</span><span class="o">.</span><span class="nx">button</span><span class="o">;</span>
<span class="c">//////////////////////////////////////////////////////</span>
<span class="c"></span>
<span class="c">/**</span>
<span class="c"> * Node reference for the targeted element</span>
<span class="c"> * @propery target</span>
<span class="c"> * @type Node</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">target</span> <span class="o">=</span> <span class="nx">resolve</span><span class="o">(</span><span class="nx">e</span><span class="o">.</span><span class="nx">target</span> <span class="o">||</span> <span class="nx">e</span><span class="o">.</span><span class="nx">srcElement</span><span class="o">);</span>
<span class="c">/**</span>
<span class="c"> * Node reference for the element that the listener was attached to.</span>
<span class="c"> * @propery currentTarget</span>
<span class="c"> * @type Node</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">currentTarget</span> <span class="o">=</span> <span class="nx">resolve</span><span class="o">(</span><span class="nx">ot</span><span class="o">);</span>
<span class="nx">t</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">relatedTarget</span><span class="o">;</span>
<span class="k">if</span> <span class="o">(!</span><span class="nx">t</span><span class="o">)</span> <span class="o">{</span>
<span class="k">if</span> <span class="o">(</span><span class="nx">e</span><span class="o">.</span><span class="nx">type</span> <span class="o">==</span> <span class="s2">"mouseout"</span><span class="o">)</span> <span class="o">{</span>
<span class="nx">t</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">toElement</span><span class="o">;</span>
<span class="o">}</span> <span class="k">else</span> <span class="k">if</span> <span class="o">(</span><span class="nx">e</span><span class="o">.</span><span class="nx">type</span> <span class="o">==</span> <span class="s2">"mouseover"</span><span class="o">)</span> <span class="o">{</span>
<span class="nx">t</span> <span class="o">=</span> <span class="nx">e</span><span class="o">.</span><span class="nx">fromElement</span><span class="o">;</span>
<span class="o">}</span>
<span class="o">}</span>
<span class="c">/**</span>
<span class="c"> * Node reference to the relatedTarget</span>
<span class="c"> * @propery relatedTarget</span>
<span class="c"> * @type Node</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">relatedTarget</span> <span class="o">=</span> <span class="nx">resolve</span><span class="o">(</span><span class="nx">t</span><span class="o">);</span>
<span class="c">/**</span>
<span class="c"> * Number representing the direction and velocity of the movement of the mousewheel.</span>
<span class="c"> * Negative is down, the higher the number, the faster. Applies to the mousewheel event.</span>
<span class="c"> * @property wheelDelta</span>
<span class="c"> * @type int</span>
<span class="c"> */</span>
<span class="k">if</span> <span class="o">(</span><span class="nx">e</span><span class="o">.</span><span class="nx">type</span> <span class="o">==</span> <span class="s2">"mousewheel"</span> <span class="o">||</span> <span class="nx">e</span><span class="o">.</span><span class="nx">type</span> <span class="o">==</span> <span class="s2">"DOMMouseScroll"</span><span class="o">)</span> <span class="o">{</span>
<span class="k">this</span><span class="o">.</span><span class="nx">wheelDelta</span> <span class="o">=</span> <span class="o">(</span><span class="nx">e</span><span class="o">.</span><span class="nx">detail</span><span class="o">)</span> <span class="o">?</span> <span class="o">(</span><span class="nx">e</span><span class="o">.</span><span class="nx">detail</span> <span class="o">*</span> <span class="o">-</span><span class="m">1</span><span class="o">)</span> <span class="o">:</span> <span class="nb">Math</span><span class="o">.</span><span class="nx">round</span><span class="o">(</span><span class="nx">e</span><span class="o">.</span><span class="nx">wheelDelta</span> <span class="o">/</span> <span class="m">80</span><span class="o">)</span> <span class="o">||</span> <span class="o">((</span><span class="nx">e</span><span class="o">.</span><span class="nx">wheelDelta</span> <span class="o"><</span> <span class="m">0</span><span class="o">)</span> <span class="o">?</span> <span class="o">-</span><span class="m">1</span> <span class="o">:</span> <span class="m">1</span><span class="o">);</span>
<span class="o">}</span>
<span class="c">//////////////////////////////////////////////////////</span>
<span class="c"></span> <span class="c">// methods</span>
<span class="c"></span>
<span class="c">/**</span>
<span class="c"> * Stops the propagation to the next bubble target</span>
<span class="c"> * @method stopPropagation</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">stopPropagation</span> <span class="o">=</span> <span class="k">function</span><span class="o">()</span> <span class="o">{</span>
<span class="k">if</span> <span class="o">(</span><span class="nx">e</span><span class="o">.</span><span class="nx">stopPropagation</span><span class="o">)</span> <span class="o">{</span>
<span class="nx">e</span><span class="o">.</span><span class="nx">stopPropagation</span><span class="o">();</span>
<span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
<span class="nx">e</span><span class="o">.</span><span class="nx">cancelBubble</span> <span class="o">=</span> <span class="kc">true</span><span class="o">;</span>
<span class="o">}</span>
<span class="nx">wrapper</span><span class="o">.</span><span class="nx">stopped</span> <span class="o">=</span> <span class="m">1</span><span class="o">;</span>
<span class="o">};</span>
<span class="c">/**</span>
<span class="c"> * Stops the propagation to the next bubble target and</span>
<span class="c"> * prevents any additional listeners from being exectued</span>
<span class="c"> * on the current target.</span>
<span class="c"> * @method stopImmediatePropagation</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">stopImmediatePropagation</span> <span class="o">=</span> <span class="k">function</span><span class="o">()</span> <span class="o">{</span>
<span class="k">if</span> <span class="o">(</span><span class="nx">e</span><span class="o">.</span><span class="nx">stopImmediatePropagation</span><span class="o">)</span> <span class="o">{</span>
<span class="nx">e</span><span class="o">.</span><span class="nx">stopImmediatePropagation</span><span class="o">();</span>
<span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
<span class="k">this</span><span class="o">.</span><span class="nx">stopPropagation</span><span class="o">();</span>
<span class="o">}</span>
<span class="nx">wrapper</span><span class="o">.</span><span class="nx">stopped</span> <span class="o">=</span> <span class="m">2</span><span class="o">;</span>
<span class="o">};</span>
<span class="c">/**</span>
<span class="c"> * Prevents the event's default behavior</span>
<span class="c"> * @method preventDefault</span>
<span class="c"> * @param returnValue {string} sets the returnValue of the event to this value</span>
<span class="c"> * (rather than the default false value). This can be used to add a customized </span>
<span class="c"> * confirmation query to the beforeunload event).</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">preventDefault</span> <span class="o">=</span> <span class="k">function</span><span class="o">(</span><span class="nx">returnValue</span><span class="o">)</span> <span class="o">{</span>
<span class="k">if</span> <span class="o">(</span><span class="nx">e</span><span class="o">.</span><span class="nx">preventDefault</span><span class="o">)</span> <span class="o">{</span>
<span class="nx">e</span><span class="o">.</span><span class="nx">preventDefault</span><span class="o">();</span>
<span class="o">}</span>
<span class="nx">e</span><span class="o">.</span><span class="nx">returnValue</span> <span class="o">=</span> <span class="nx">returnValue</span> <span class="o">||</span> <span class="kc">false</span><span class="o">;</span>
<span class="nx">wrapper</span><span class="o">.</span><span class="nx">prevented</span> <span class="o">=</span> <span class="m">1</span><span class="o">;</span>
<span class="o">};</span>
<span class="c">/**</span>
<span class="c"> * Stops the event propagation and prevents the default</span>
<span class="c"> * event behavior.</span>
<span class="c"> * @method halt</span>
<span class="c"> * @param immediate {boolean} if true additional listeners</span>
<span class="c"> * on the current target will not be executed</span>
<span class="c"> */</span>
<span class="k">this</span><span class="o">.</span><span class="nx">halt</span> <span class="o">=</span> <span class="k">function</span><span class="o">(</span><span class="nx">immediate</span><span class="o">)</span> <span class="o">{</span>
<span class="k">if</span> <span class="o">(</span><span class="nx">immediate</span><span class="o">)</span> <span class="o">{</span>
<span class="k">this</span><span class="o">.</span><span class="nx">stopImmediatePropagation</span><span class="o">();</span>
<span class="o">}</span> <span class="k">else</span> <span class="o">{</span>
<span class="k">this</span><span class="o">.</span><span class="nx">stopPropagation</span><span class="o">();</span>
<span class="o">}</span>
<span class="k">this</span><span class="o">.</span><span class="nx">preventDefault</span><span class="o">();</span>
<span class="o">};</span>
<span class="o">};</span>
<span class="o">})();</span>
</pre></div>
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