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63 lines
5.8 KiB
HTML
63 lines
5.8 KiB
HTML
<article class="" id="post-">
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<header class="entry-header">
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<h1 class="entry-title">:has() Selector</h1>
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<div class="entry-meta">
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所属分类：<span class="category"><a href="/category/selectors/">选择器</a> > <a href="/category/selectors/content-filter-selector/">内容过滤</a></span><span class="category-divider"> | </span><span class="category"><a href="/category/selectors/">选择器</a> > <a href="/category/selectors/jquery-selector-extensions/">jQuery 扩展</a></span>
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<span class="pull-right">英文文档：<a href="https://api.jquery123.com/has-selector/" target="_blank">:has() Selector</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 selector" id="has1"><h2 class="section-title"><span>has selector</span></h2>
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<div class="entry-wrapper">
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<p class="desc"><strong>描述: </strong>选择元素其中至少包含指定选择器匹配的一个种元素。</p>
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<ul class="signatures"><li class="signature">
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<h4 class="name">
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<span class="version-details">添加的版本: <a href="/category/version/1.1.4/">1.1.4</a></span>jQuery( ":has(selector)" )</h4>
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<p class="argument"><strong>selector: </strong>任何选择器。</p>
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</li></ul>
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<div class="longdesc" id="entry-longdesc">
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<p>如果表达式 <code>$('div:has(p)')</code> 匹配一个 <code><div></code>，那么应有一个<code><p></code>存在于 <code><div></code> 后代元素中的任何地方，不是直接的子元素也可以。</p>
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</div>
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<h3>Additional Notes:</h3>
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<div class="longdesc"><ul>
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<li>
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因为 <code>:has()</code> 是一个 jQuery 延伸出来的一个选择器 。并且不是的CSS规范的一部分, 使用<code>:has()</code>查询不能充分利用原生DOM提供的<code>querySelectorAll()</code> 方法来提高性能。为了在现代浏览器上获得更佳的性能，请使用<code>$("your-pure-css-selector").has(selector/DOMElement)</code> 代替。
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</li>
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</ul></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">给所有含有 p 段落标签的 div 加上一个名为 "test" 的 class。</span></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 n16">16</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">style</span>></span><span class="css"></span></code></div></div><div class="container"><div class="line"><code> <span class="class">.test</span><span class="rules">{ <span class="rule"><span class="attribute">border</span>:<span class="value"> <span class="number">3</span>px inset red;</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">div</span>></span><span class="tag"><<span class="title">p</span>></span>Hello in a paragraph<span class="tag"></<span class="title">p</span>></span><span class="tag"></<span class="title">div</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">div</span>></span>Hello again! (with no paragraph)<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">script</span>></span><span class="javascript">$(<span class="string">"div:has(p)"</span>).addClass(<span class="string">"test"</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> |