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132 lines
11 KiB
HTML
132 lines
11 KiB
HTML
<article class="" id="post-">
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<header class="entry-header">
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<h1 class="entry-title">.contents()</h1>
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<div class="entry-meta">
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所属分类：<span class="category"><a href="/category/traversing/">遍历</a> > <a href="/category/traversing/miscellaneous-traversal/">其它遍历</a></span>
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<span class="pull-right">英文文档：<a href="https://api.jquery123.com/contents/" target="_blank">.contents()</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="contents1"><h2 class="section-title">
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<span class="name">.contents()</span><span class="returns">返回: <a href="/Types/#jQuery">jQuery</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>获得匹配元素集合中每个元素的子元素，包括文字和注释节点。</p>
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<ul class="signatures"><li class="signature" id="contents">
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<h4 class="name">
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<span class="version-details">添加的版本: <a href="/category/version/1.2/">1.2</a></span>.contents()</h4>
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<ul><li><div class="null-signature">这个方法不接受任何参数</div></li></ul>
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</li></ul>
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<div class="longdesc" id="entry-longdesc">
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<p>给定一个jQuery对象，表示一个DOM元素的集合，<code>.contents()</code>方法允许我们在 DOM 树中查找集合中的直接子元素，并根据匹配的元素创建一个新的 jQuery 对象。<code>.contents()</code>和<code>.children()</code>方法类似，只不过前者包括文本节点以及jQuery对象中产生的HTML元素。</p>
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<p>如果IFRAME是在与主页同域，<code>.contents()</code>方法也可用于获取iframe中的文件内容。</p>
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<p>考虑一个简单<code><div></code>中一些文本节点，其中每个元素是相隔两换行符（<code><br /></code> ）：</p>
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<div class="syntaxhighlighter xml nogutter">
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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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<div class="line n3">3</div>
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<div class="line n4">4</div>
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<div class="line n5">5</div>
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<div class="line n6">6</div>
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<div class="line n7">7</div>
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<div class="line n8">8</div>
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<div class="line n9">9</div>
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<div class="line n10">10</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><span class="tag"><<span class="title">div</span> <span class="attribute">class</span>=<span class="value">"container"</span>></span></code></div></div><div class="container"><div class="line"><code> Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed </code></div></div><div class="container"><div class="line"><code> do eiusmod tempor incididunt ut labore et dolore magna aliqua. </code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">br</span> /></span><span class="tag"><<span class="title">br</span> /></span></code></div></div><div class="container"><div class="line"><code> Ut enim ad minim veniam, quis nostrud exercitation ullamco </code></div></div><div class="container"><div class="line"><code> laboris nisi ut aliquip ex ea commodo consequat.</code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">br</span> /></span> <span class="tag"><<span class="title">br</span> /></span></code></div></div><div class="container"><div class="line"><code> Duis aute irure dolor in reprehenderit in voluptate velit </code></div></div><div class="container"><div class="line"><code> esse cillum dolore eu fugiat nulla pariatur.</code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">div</span>></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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<p>我们可以使用<code>.contents()</code>方法将上述文本转换成三个格式良好的段落：</p>
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<div class="syntaxhighlighter javascript nogutter">
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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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<div class="line n3">3</div>
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<div class="line n4">4</div>
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<div class="line n5">5</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>$(<span class="string">'.container'</span>).contents().filter(<span class="keyword">function</span>() {</code></div></div><div class="container"><div class="line"><code> <span class="keyword">return</span> <span class="keyword">this</span>.nodeType == <span class="number">3</span>;</code></div></div><div class="container"><div class="line"><code>})</code></div></div><div class="container"><div class="line"><code> .wrap(<span class="string">'<p></p>'</span>)</code></div></div><div class="container"><div class="line"><code>.end()</code></div></div><div class="container"><div class="line"><code>.filter(<span class="string">'br'</span>)</code></div></div><div class="container"><div class="line"><code> .remove();</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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<p>此代码首先检索<code><div class="container"></code>的内容，然后过滤它的文本节点，并且将它被包裹在段落标记内。这是通过测试元素的<a href="https://developer.mozilla.org/en/nodeType"><code>.nodeType</code>属性</a>。这个DOM属性保存一个数字代码，以显示节点的类型;文本节点使用代码3。再次过滤的内容，这次是<code><br /></code>元素，这些元素都将被删除。</p>
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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>Example: <span class="desc">段落内找到所有的文本节点，并将他们包装了一个标记。</span>
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</h4>
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<div class="syntaxhighlighter xml ">
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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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<div class="line n3">3</div>
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<div class="line n4">4</div>
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<div class="line n5">5</div>
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<div class="line n6">6</div>
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<div class="line n7">7</div>
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<div class="line n8">8</div>
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<div class="line n9">9</div>
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<div class="line n10">10</div>
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<div class="line n11">11</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><span class="doctype"><!DOCTYPE html></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">html</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">head</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"https://code.jquery.com/jquery-latest.js"</span>></span><span class="javascript"></span><span class="tag"></<span class="title">script</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">head</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">body</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">p</span>></span>Hello <span class="tag"><<span class="title">a</span> <span class="attribute">href</span>=<span class="value">"http://ejohn.org/"</span>></span>John<span class="tag"></<span class="title">a</span>></span>, how are you doing?<span class="tag"></<span class="title">p</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">script</span>></span><span class="javascript">$(<span class="string">"p"</span>).contents().filter(<span class="keyword">function</span>(){ <span class="keyword">return</span> <span class="keyword">this</span>.nodeType != <span class="number">1</span>; }).wrap(<span class="string">"<b/>"</span>);</span><span class="tag"></<span class="title">script</span>></span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">body</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">html</span>></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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<h4>Demo:</h4>
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<div class="demo code-demo"></div>
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</div>
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<div class="entry-example" id="example-1">
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<h4>Example: <span class="desc">改变背景颜色的iframe里面的链接。</span>
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</h4>
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<div class="syntaxhighlighter xml ">
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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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<div class="line n3">3</div>
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<div class="line n4">4</div>
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<div class="line n5">5</div>
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<div class="line n6">6</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><span class="doctype"><!DOCTYPE html></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">html</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">head</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"https://code.jquery.com/jquery-latest.js"</span>></span><span class="javascript"></span><span class="tag"></<span class="title">script</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">head</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">body</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">iframe</span> <span class="attribute">src</span>=<span class="value">"http://api.jquery.com/"</span> <span class="attribute">width</span>=<span class="value">"80%"</span> <span class="attribute">height</span>=<span class="value">"600"</span> <span class="attribute">id</span>=<span class="value">'frameDemo'</span>></span><span class="tag"></<span class="title">iframe</span>></span> </code></div></div><div class="container"><div class="line"><code><span class="tag"><<span class="title">script</span>></span><span class="javascript">$(<span class="string">"#frameDemo"</span>).contents().find(<span class="string">"a"</span>).css(<span class="string">"background-color"</span>,<span class="string">"#BADA55"</span>);</span><span class="tag"></<span class="title">script</span>></span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">body</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">html</span>></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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<h4>Demo:</h4>
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<div class="demo code-demo"></div>
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</div></section>
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</div></article> </div>
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</article> |