mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-08 23:14:06 +08:00
120 lines
9.1 KiB
HTML
120 lines
9.1 KiB
HTML
<article class="" id="post-">
|
||
<header class="entry-header">
|
||
<h1 class="entry-title">.empty()</h1>
|
||
<div class="entry-meta">
|
||
所属分类：<span class="category"><a href="/category/manipulation/">DOM 操作</a> > <a href="/category/manipulation/dom-removal/">DOM 移除</a></span>
|
||
<span class="pull-right">英文文档：<a href="https://api.jquery123.com/empty/" target="_blank">.empty()</a></span>
|
||
</div><!-- .entry-meta -->
|
||
</header><!-- .entry-header -->
|
||
<!-- .entry-header -->
|
||
<div class="entry-content">
|
||
<article class="entry method" id="empty1"><h2 class="section-title">
|
||
<span class="name">.empty()</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>从DOM中移除集合中匹配元素的所有子节点。</p>
|
||
<ul class="signatures"><li class="signature" id="empty">
|
||
<h4 class="name">
|
||
<span class="version-details">添加的版本: <a href="/category/version/1.0/">1.0</a></span>.empty()</h4>
|
||
<ul><li><div class="null-signature">这个方法不接受任何参数。</div></li></ul>
|
||
</li></ul>
|
||
<div class="longdesc" id="entry-longdesc">
|
||
<p>这个方法不仅移除子元素（和其他后代元素），同样移除元素里的文本。因为，根据说明，元素里任何文本字符串都被看做是该元素的子节点。请看下面的HTML：</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>
|
||
<div class="line n4">4</div>
|
||
</td>
|
||
<td class="code">
|
||
<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> <span class="tag"><<span class="title">div</span> <span class="attribute">class</span>=<span class="value">"hello"</span>></span>Hello<span class="tag"></<span class="title">div</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">div</span> <span class="attribute">class</span>=<span class="value">"goodbye"</span>></span>Goodbye<span class="tag"></<span class="title">div</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">div</span>></span></code></div></div></pre>
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
</div>
|
||
<p>我们可以移除里面的任何元素</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">'.hello'</span>).empty();</code></div></div></pre>
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
</div>
|
||
<p>结果文本 <code>Hello</code>文本被删除：</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>
|
||
<div class="line n4">4</div>
|
||
</td>
|
||
<td class="code">
|
||
<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> <span class="tag"><<span class="title">div</span> <span class="attribute">class</span>=<span class="value">"hello"</span>></span><span class="tag"></<span class="title">div</span>></span></code></div></div><div class="container"><div class="line"><code> <span class="tag"><<span class="title">div</span> <span class="attribute">class</span>=<span class="value">"goodbye"</span>></span>Goodbye<span class="tag"></<span class="title">div</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">div</span>></span></code></div></div></pre>
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
</div>
|
||
<p>如果 <code><div class="hello"></code>里面包含任何数量的嵌套元素，他们也会被移走。</p>
|
||
<p>
|
||
为了避免内存泄漏，jQuery先移除子元素的数据和事件处理函数，然后移除子元素。
|
||
</p>
|
||
<p>如果你想删除元素，不破坏他们的数据或事件处理程序（这些绑定的信息还可以在之后被重新添加回来），请使用<a href="/detach"><code>.detach()</code></a>代替 。</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">移除段落中的所有子节点包括文本</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>
|
||
</td>
|
||
<td class="code">
|
||
<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">style</span>></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">background</span>:<span class="value">yellow;</span></span> <span class="rule">}</span></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">style</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></code></div></div><div class="container"><div class="line"><code> Hello, <span class="tag"><<span class="title">span</span>></span>Person<span class="tag"></<span class="title">span</span>></span> <span class="tag"><<span class="title">a</span> <span class="attribute">href</span>=<span class="value">"javascript:;"</span>></span>and person<span class="tag"></<span class="title">a</span>></span></code></div></div><div class="container"><div class="line"><code><span class="tag"></<span class="title">p</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">button</span>></span>Call empty() on above paragraph<span class="tag"></<span class="title">button</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></code></div></div><div class="container"><div class="line"><code> $(<span class="string">"button"</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="string">"p"</span>).empty();</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">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>
|
||
</td>
|
||
</tr>
|
||
</tbody>
|
||
</table>
|
||
</div>
|
||
<h4>Demo:</h4>
|
||
<div class="demo code-demo"></div>
|
||
</div></section>
|
||
</div></article> </div>
|
||
</article> |