doc/node/fn.closest.html

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        <link rel="shortcut icon" href="/favicon.ico" type="image/x-icon" />
        <title>$.fn.closest</title>
        <script>
            window.$$path = location.protocol + "//" + location.host;
            document.write('<script src="' + $$path + '/mass_merge.js"><\/script>')
            document.write('<script src="' + $$path + '/doc/scripts/common.js"><\/script>')
        </script>
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        <article>
            <style type="text/css">
                .sample1 { margin: 3px; padding: 3px; }
                .hilight { color:#00CED1 ; }
            </style>
            <h3>$.fn.closest(expr, [context])</h3>
            <p>
                <span class="stress">描述：</span>
            </p>
            <p>取得匹配节点中所有第一个匹配expr的最近祖先，去重排序后构成新实例返回。</p>
            <p>
                <span class="stress">参数：</span>
            </p>
            <dl>
                <dt>expr</dt>
                <dd>必需。String。CSS表达式。</dd>
                <dt>context</dt>
                <dd>可选。元素节点。</dd>
            </dl>
            <p>
                <span class="stress">返回值：</span>
            </p>
            <p>新mass实例。</p>
            <fieldset>
                <legend>例子</legend>
                <p>closest最大的用处是实现自己的事件代理，虽然事件代理在dom Framework中提供支持。</p>
                <ul class="sample1">
                    <li>list item 1</li>
                    <li>list item 2
                        <ul>
                            <li>list item 2-a</li>
                            <li>list item 2-b</li>
                        </ul>
                    </li>
                    <li>
                        <b>list item 3</b>
                    </li>
                    <li>list item 4</li>
                </ul>
                <pre class="brush:xml;gutter:false;toolbar:false">

   <ul class="sample1">
        <li>list item 1</li>
        <li>list item 2
            <ul>
                <li>list item 2-a</li>
                <li>list item 2-b</li>
            </ul>
        </li>
        <li><b>list item 3</b></li>
        <li>list item 4</li>
    </ul>
    
</pre>
                <pre class="brush:javascript;gutter:false;toolbar:false">
$.require("ready,attr,event", function() {
    $(document).one("click", function(e) {
        $(e.target).closest("li").toggleClass("hilight");
    });
});
</pre>
                <button class="doc_btn" type="button">点我，执行代码</button>
            </fieldset>
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