2019-04-21 11:50:48 +08:00

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<article class="" id="post-">
<header class="entry-header">
<h1 class="entry-title">.html()</h1>
<div class="entry-meta">
所属分类:<span class="category"><a href="/category/attributes/">DOM 属性</a></span><span class="category-divider"> | </span><span class="category"><a href="/category/manipulation/">DOM 操作</a> &gt; <a href="/category/manipulation/dom-insertion-inside/">DOM 插入现有元素内</a></span>
<span class="pull-right">英文文档:<a href="https://api.jquery123.com/html/" target="_blank">.html()</a></span>
</div><!-- .entry-meta -->
</header><!-- .entry-header -->
<!-- .entry-header -->
<div class="entry-content">获取集合中第一个匹配元素的HTML内容 或 设置每一个匹配元素的html内容。<div class="toc">
<h4><span>Contents:</span></h4>
<ul class="toc-list">
<li>
<a href="#html1">.html()</a><ul><li>.html()</li></ul>
</li>
<li>
<a href="#html2">.html( htmlString )</a><ul>
<li>.html( htmlString )</li>
<li>.html( function(index, oldhtml) )</li>
</ul>
</li>
</ul>
</div><article class="entry method" id="html1"><h2 class="section-title">
<span class="name">.html()</span><span class="returns">返回: <a href="/Types/#String">String</a></span>
</h2>
<div class="entry-wrapper">
<p class="desc"><strong>描述: </strong>获取集合中第一个匹配元素的HTML内容 </p>
<ul class="signatures"><li class="signature" id="html">
<h4 class="name">
<span class="version-details">添加的版本: <a href="/category/version/1.0/">1.0</a></span>.html()</h4>
<ul><li><div class="null-signature">这个方法不接收任何元素。</div></li></ul>
</li></ul>
<div class="longdesc" id="entry-longdesc">
<p>
获取集合中第一个匹配元素的HTML内容</p>
<p>在一个 HTML 文档中, 我们可以使用 <code>.html()</code> 方法来获取任意一个元素的内容。 如果选择器匹配多个元素,那么只有第一个匹配元素的 HTML 内容会被获取。 考虑下面的代码:</p>
<div class="syntaxhighlighter javascript nogutter">
<table>
<tbody>
<tr>
<td class="gutter">
<div class="line n1">1</div>
</td>
<td class="code">
<pre><div class="container"><div class="line"><code>$(<span class="string">'div.demo-container'</span>).html();</code></div></div></pre>
</td>
</tr>
</tbody>
</table>
</div>
<p>下文的获取的<code>&lt;div&gt;</code>的内容, 必定是在文档中的第一个<code>class="demo-container"</code>的div中获取的</p>
<div class="syntaxhighlighter xml nogutter">
<table>
<tbody>
<tr>
<td class="gutter">
<div class="line n1">1</div>
<div class="line n2">2</div>
<div class="line n3">3</div>
</td>
<td class="code">
<pre><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">div</span> <span class="attribute">class</span>=<span class="value">"demo-container"</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">div</span> <span class="attribute">class</span>=<span class="value">"demo-box"</span>&gt;</span>Demonstration Box<span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div></pre>
</td>
</tr>
</tbody>
</table>
</div>
<p>结果如下:</p>
<div class="syntaxhighlighter xml nogutter">
<table>
<tbody>
<tr>
<td class="gutter">
<div class="line n1">1</div>
</td>
<td class="code">
<pre><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">div</span> <span class="attribute">class</span>=<span class="value">"demo-box"</span>&gt;</span>Demonstration Box<span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div></pre>
</td>
</tr>
</tbody>
</table>
</div>
<p>这种方法使用浏览器的<code>innerHTML</code> 属性。有些浏览器返回的结果可能不是原始文档的 HTML 源代码。例如如果属性值只包含字母数字字符Internet Explorer有时丢弃包裹属性值的引号。</p>
</div>
<section class="entry-examples" id="entry-examples"><header><h2 class="underline">例子:</h2></header><div class="entry-example" id="example-0">
<h4><span class="desc">点击段落将HTML转化为文本</span></h4>
<div class="syntaxhighlighter xml ">
<table>
<tbody>
<tr>
<td class="gutter">
<div class="line n1">1</div>
<div class="line n2">2</div>
<div class="line n3">3</div>
<div class="line n4">4</div>
<div class="line n5">5</div>
<div class="line n6">6</div>
<div class="line n7">7</div>
<div class="line n8">8</div>
<div class="line n9">9</div>
<div class="line n10">10</div>
<div class="line n11">11</div>
<div class="line n12">12</div>
<div class="line n13">13</div>
<div class="line n14">14</div>
<div class="line n15">15</div>
<div class="line n16">16</div>
<div class="line n17">17</div>
<div class="line n18">18</div>
<div class="line n19">19</div>
<div class="line n20">20</div>
<div class="line n21">21</div>
<div class="line n22">22</div>
<div class="line n23">23</div>
<div class="line n24">24</div>
<div class="line n25">25</div>
<div class="line n26">26</div>
<div class="line n27">27</div>
<div class="line n28">28</div>
<div class="line n29">29</div>
<div class="line n30">30</div>
</td>
<td class="code">
<pre><div class="container"><div class="line"><code><span class="doctype">&lt;!DOCTYPE html&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">html</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">style</span>&gt;</span><span class="css"></span></code></div></div><div class="container"><div class="line"><code> <span class="tag">p</span> <span class="rules">{ <span class="rule"><span class="attribute">margin</span>:<span class="value"><span class="number">8</span>px;</span></span> <span class="rule"><span class="attribute">font-size</span>:<span class="value"><span class="number">20</span>px;</span></span> <span class="rule"><span class="attribute">color</span>:<span class="value">blue;</span></span></span></code></div></div><div class="container"><div class="line"><code> <span class="rule"><span class="attribute">cursor</span>:<span class="value">pointer;</span></span> <span class="rule">}</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">b</span> <span class="rules">{ <span class="rule"><span class="attribute">text-decoration</span>:<span class="value">underline;</span></span> <span class="rule">}</span></span></code></div></div><div class="container"><div class="line"><code> <span class="tag">button</span> <span class="rules">{ <span class="rule"><span class="attribute">cursor</span>:<span class="value">pointer;</span></span> <span class="rule">}</span></span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;/<span class="title">style</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"https://code.jquery.com/jquery-latest.js"</span>&gt;</span><span class="javascript"></span><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">p</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">b</span>&gt;</span>Click<span class="tag">&lt;/<span class="title">b</span>&gt;</span> to change the <span class="tag">&lt;<span class="title">span</span> <span class="attribute">id</span>=<span class="value">"tag"</span>&gt;</span>html<span class="tag">&lt;/<span class="title">span</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;/<span class="title">p</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">p</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> to a <span class="tag">&lt;<span class="title">span</span> <span class="attribute">id</span>=<span class="value">"text"</span>&gt;</span>text<span class="tag">&lt;/<span class="title">span</span>&gt;</span> node.</code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;/<span class="title">p</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">p</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> This <span class="tag">&lt;<span class="title">button</span> <span class="attribute">name</span>=<span class="value">"nada"</span>&gt;</span>button<span class="tag">&lt;/<span class="title">button</span>&gt;</span> does nothing.</code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;/<span class="title">p</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">script</span>&gt;</span><span class="javascript"></span></code></div></div><div class="container"><div class="line"><code>$(<span class="string">"p"</span>).click(<span class="function"><span class="keyword">function</span> <span class="params">()</span> {</span></code></div></div><div class="container"><div class="line"><code> <span class="keyword">var</span> htmlStr = $(<span class="keyword">this</span>).html();</code></div></div><div class="container"><div class="line"><code> $(<span class="keyword">this</span>).text(htmlStr);</code></div></div><div class="container"><div class="line"><code>});</code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">html</span>&gt;</span></code></div></div></pre>
</td>
</tr>
</tbody>
</table>
</div>
<h4>Demo:</h4>
<div class="demo code-demo"></div>
</div></section>
</div></article><article class="entry method" id="html2"><h2 class="section-title">
<span class="name">.html( htmlString )</span><span class="returns">返回: <a href="/Types/#jQuery">jQuery</a></span>
</h2>
<div class="entry-wrapper">
<p class="desc"><strong>描述: </strong>设置每一个匹配元素的html内容。</p>
<ul class="signatures">
<li class="signature" id="html-htmlString">
<h4 class="name">
<span class="version-details">添加的版本: <a href="/category/version/1.0/">1.0</a></span>.html( htmlString )</h4>
<ul><li>
<div><strong>htmlString</strong></div>
<div>类型: <a href="/Types/#String">String</a>
</div>
<div>用来设置每个匹配元素的一个HTML 字符串。</div>
</li></ul>
</li>
<li class="signature" id="html-functionindex--oldhtml">
<h4 class="name">
<span class="version-details">添加的版本: <a href="/category/version/1.4/">1.4</a></span>.html( function(index, oldhtml) )</h4>
<ul><li>
<div><strong>function(index, oldhtml)</strong></div>
<div>类型: <a href="/Types/#Function">Function</a>()</div>
<div>用来返回设置HTML内容的一个函数。接收元素的索引位置和元素原先的HTML作为参数。jQuery的调用这个函数之前会清空元素;使用oldhtml参数引用先前的内容。在这个函数中<code>this</code>指向元素集合中的当前元素。</div>
</li></ul>
</li>
</ul>
<div class="longdesc" id="entry-longdesc-1">
<p> 这个 <code>.html()</code> 方法对 XML 文档无效. </p>
<p>我们可以使用 <code>.html()</code> 来设置元素的内容这些元素中的任何内容会完全被新的内容取代。此外用新的内容替换这些元素前jQuery从子元素删除其他结构如数据和事件处理程序。这样可以防止内存溢出。
</p>
<p>考虑以下的HTML</p>
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<div class="line n1">1</div>
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<td class="code">
<pre><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">div</span> <span class="attribute">class</span>=<span class="value">"demo-container"</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">div</span> <span class="attribute">class</span>=<span class="value">"demo-box"</span>&gt;</span>Demonstration Box<span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div></pre>
</td>
</tr>
</tbody>
</table>
</div>
<p>我们可以像这样设置 <code>&lt;div class="demo-container"&gt;</code>的HTML内容</p>
<div class="syntaxhighlighter javascript nogutter">
<table>
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<td class="gutter">
<div class="line n1">1</div>
<div class="line n2">2</div>
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<pre><div class="container"><div class="line"><code>$(<span class="string">'div.demo-container'</span>)</code></div></div><div class="container"><div class="line"><code> .html(<span class="string">'&lt;p&gt;All new content. &lt;em&gt;You bet!&lt;/em&gt;&lt;/p&gt;'</span>);</code></div></div></pre>
</td>
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</div>
<p>这行代码将替换 <code>&lt;div class="demo-container"&gt;</code>里的所有内容</p>
<div class="syntaxhighlighter xml nogutter">
<table>
<tbody>
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<td class="gutter">
<div class="line n1">1</div>
<div class="line n2">2</div>
<div class="line n3">3</div>
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<td class="code">
<pre><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">div</span> <span class="attribute">class</span>=<span class="value">"demo-container"</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">p</span>&gt;</span>All new content. <span class="tag">&lt;<span class="title">em</span>&gt;</span>You bet!<span class="tag">&lt;/<span class="title">em</span>&gt;</span><span class="tag">&lt;/<span class="title">p</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div></pre>
</td>
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</tbody>
</table>
</div>
<p>在 jQuery 1.4中, <code>.html()</code> 方法允许我们通过函数来传递HTML内容。</p>
<div class="syntaxhighlighter javascript nogutter">
<table>
<tbody>
<tr>
<td class="gutter">
<div class="line n1">1</div>
<div class="line n2">2</div>
<div class="line n3">3</div>
<div class="line n4">4</div>
</td>
<td class="code">
<pre><div class="container"><div class="line"><code>$(<span class="string">'div.demo-container'</span>).html(<span class="keyword">function</span>() {</code></div></div><div class="container"><div class="line"><code> <span class="keyword">var</span> emph = <span class="string">'&lt;em&gt;'</span> + $(<span class="string">'p'</span>).length + <span class="string">' paragraphs!&lt;/em&gt;'</span>;</code></div></div><div class="container"><div class="line"><code> <span class="keyword">return</span> <span class="string">'&lt;p&gt;All new content for '</span> + emph + <span class="string">'&lt;/p&gt;'</span>;</code></div></div><div class="container"><div class="line"><code>});</code></div></div></pre>
</td>
</tr>
</tbody>
</table>
</div>
<p>给定一个拥有6个段落的HTML文档在这个例子中将设置 <code>&lt;p&gt;All new content for &lt;em&gt;6 paragraphs!&lt;/em&gt;&lt;/p&gt;</code><code>&lt;div class="demo-container"&gt;</code>的新HTML内容。</p>
<p>这种方法使用浏览器的<code>innerHTML</code> 属性。有些浏览器可能不完全复制所提供的HTML源代码生成DOM。例如Internet Explorer的版本8之前转换所有链接的<code>href</code>属性为绝对URL路径和Internet Explorer第9版之前不增加一个单独的<a href="http://code.google.com/p/html5shiv/">兼容层</a>的情况下将无法正确处理HTML5元素。</p>
<p>
<strong>注意:</strong>
在Internet Explorer中包括第9版
 设置HTML元素的文本内容可能会破坏其子节点的文本节点结果导致子节点的文本节点从文档中被删除。如果你想保留这些 DOM 元素的引用,需要他们将保持不变,请使用<code>.empty().html(string)</code>来代替<code>.html(string)</code>,以便从文档中删除元素之前的元素被分配到新的字符串。</p>
</div>
<section class="entry-examples" id="entry-examples-1"><header><h2 class="underline">例子:</h2></header><div class="entry-example" id="example-1-0">
<h4>Example: <span class="desc">为每个div设置一些内容。</span>
</h4>
<div class="syntaxhighlighter xml ">
<table>
<tbody>
<tr>
<td class="gutter">
<div class="line n1">1</div>
<div class="line n2">2</div>
<div class="line n3">3</div>
<div class="line n4">4</div>
<div class="line n5">5</div>
<div class="line n6">6</div>
<div class="line n7">7</div>
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<div class="line n10">10</div>
<div class="line n11">11</div>
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<div class="line n13">13</div>
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<div class="line n15">15</div>
<div class="line n16">16</div>
<div class="line n17">17</div>
</td>
<td class="code">
<pre><div class="container"><div class="line"><code><span class="doctype">&lt;!DOCTYPE html&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">html</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">style</span>&gt;</span><span class="css"></span></code></div></div><div class="container"><div class="line"><code> <span class="class">.red</span> <span class="rules">{ <span class="rule"><span class="attribute">color</span>:<span class="value">red;</span></span> <span class="rule">}</span></span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;/<span class="title">style</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"https://code.jquery.com/jquery-latest.js"</span>&gt;</span><span class="javascript"></span><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">span</span>&gt;</span>Hello<span class="tag">&lt;/<span class="title">span</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">div</span>&gt;</span><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">div</span>&gt;</span><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">div</span>&gt;</span><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">script</span>&gt;</span><span class="javascript">$(<span class="string">"div"</span>).html(<span class="string">"&lt;span class='red'&gt;Hello &lt;b&gt;Again&lt;/b&gt;&lt;/span&gt;"</span>);</span><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">html</span>&gt;</span></code></div></div></pre>
</td>
</tr>
</tbody>
</table>
</div>
<h4>Demo:</h4>
<div class="demo code-demo"></div>
</div>
<div class="entry-example" id="example-1-1">
<h4>Example: <span class="desc">添加了一些html到每个div然后立刻做进一步的操作来插入的HTML。</span>
</h4>
<div class="syntaxhighlighter xml ">
<table>
<tbody>
<tr>
<td class="gutter">
<div class="line n1">1</div>
<div class="line n2">2</div>
<div class="line n3">3</div>
<div class="line n4">4</div>
<div class="line n5">5</div>
<div class="line n6">6</div>
<div class="line n7">7</div>
<div class="line n8">8</div>
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<div class="line n11">11</div>
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</td>
<td class="code">
<pre><div class="container"><div class="line"><code><span class="doctype">&lt;!DOCTYPE html&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">html</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">style</span>&gt;</span><span class="css"></span></code></div></div><div class="container"><div class="line"><code> <span class="tag">div</span> <span class="rules">{ <span class="rule"><span class="attribute">color</span>:<span class="value">blue;</span></span> <span class="rule"><span class="attribute">font-size</span>:<span class="value"><span class="number">18</span>px;</span></span> <span class="rule">}</span></span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;/<span class="title">style</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">script</span> <span class="attribute">src</span>=<span class="value">"https://code.jquery.com/jquery-latest.js"</span>&gt;</span><span class="javascript"></span><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">head</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">div</span>&gt;</span><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">div</span>&gt;</span><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">&lt;<span class="title">div</span>&gt;</span><span class="tag">&lt;/<span class="title">div</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;<span class="title">script</span>&gt;</span><span class="javascript"></span></code></div></div><div class="container"><div class="line"><code> $(<span class="string">"div"</span>).html(<span class="string">"&lt;b&gt;Wow!&lt;/b&gt; Such excitement..."</span>);</code></div></div><div class="container"><div class="line"><code> $(<span class="string">"div b"</span>).append(document.createTextNode(<span class="string">"!!!"</span>))</code></div></div><div class="container"><div class="line"><code> .css(<span class="string">"color"</span>, <span class="string">"red"</span>);</code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">script</span>&gt;</span></code></div></div><div class="container"><div class="line"><code> </code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">body</span>&gt;</span></code></div></div><div class="container"><div class="line"><code><span class="tag">&lt;/<span class="title">html</span>&gt;</span></code></div></div></pre>
</td>
</tr>
</tbody>
</table>
</div>
<h4>Demo:</h4>
<div class="demo code-demo"></div>
</div></section>
</div></article> </div>
</article>