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60 lines
2.9 KiB
HTML
60 lines
2.9 KiB
HTML
<article class="" id="post-">
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<header class="entry-header">
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<h1 class="entry-title">jQuery.contains()</h1>
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<div class="entry-meta">
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所属分类：<span class="category"><a href="/category/utilities/">工具类</a></span>
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<span class="pull-right">英文文档：<a href="https://api.jquery123.com/jQuery.contains/" target="_blank">jQuery.contains()</a></span>
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</div><!-- .entry-meta -->
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</header><!-- .entry-header -->
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<!-- .entry-header -->
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<div class="entry-content">
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<article class="entry method" id="jQuery-contains1"><h2 class="section-title">
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<span class="name">jQuery.contains( container, contained )</span><span class="returns">返回: <a href="/Types/#Boolean">Boolean</a></span>
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</h2>
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<div class="entry-wrapper">
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<p class="desc"><strong>描述: </strong>
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检查一个DOM元素是另一个DOM元素的后代。</p>
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<ul class="signatures"><li class="signature" id="jQuery-contains-container-contained">
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<h4 class="name">
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<span class="version-details">添加的版本: <a href="/category/version/1.4/">1.4</a></span>jQuery.contains( container, contained )</h4>
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<ul>
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<li>
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<div><strong>container</strong></div>
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<div>类型: <a href="/Types/#Element">Element</a>
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</div>
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<div>DOM元素作为容器，可以包含其他元素</div>
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</li>
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<li>
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<div><strong>contained</strong></div>
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<div>类型: <a href="/Types/#Element">Element</a>
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</div>
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<div>DOM元素，可能被其他元素所包含</div>
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</li>
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</ul>
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</li></ul>
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<div class="longdesc" id="entry-longdesc">
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<p>如果第二个参数所提供的DOM元素是第一个参数DOM元素的后裔，那么<code>$.contains()</code> 方法返回<code>true</code>，无论是直接的子元素或者是后代元素。否则，返回<code>false</code>。只支持 <em>element</em> 节点;如果第二个参数是一个文本或注释节点，<code>$.contains()</code>将返回 <code>false</code>。</p>
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<blockquote>
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<p><strong>注意:</strong> 第一个参数<em>必须</em>是一个DOM元素，不是一个jQuery对象或普通的JavaScript对象。</p>
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</blockquote>
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</div>
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<section class="entry-examples" id="entry-examples"><header><h2 class="underline">例子:</h2></header><div class="entry-example" id="example-0">
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<h4><span class="desc">检测一个元素是否在另一个元素之内。 不支持文档和注释节点。</span></h4>
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<div class="syntaxhighlighter javascript ">
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<table>
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<tbody>
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<tr>
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<td class="gutter">
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<div class="line n1">1</div>
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<div class="line n2">2</div>
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</td>
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<td class="code">
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<pre><div class="container"><div class="line"><code>$.contains( document.documentElement, document.body ); <span class="comment">// true</span></code></div></div><div class="container"><div class="line"><code>$.contains( document.body, document.documentElement ); <span class="comment">// false</span></code></div></div></pre>
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</td>
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</tr>
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</tbody>
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</table>
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</div>
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</div></section>
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</div></article> </div>
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</article> |