uTools-Manuals/docs/jQuery/class-selector.html

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<h1 class="entry-title">Class Selector (".class")</h1>
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						所属分类：<span class="category"><a href="/category/selectors/">选择器</a> &gt; <a href="/category/selectors/basic-css-selectors/">基础选择器</a></span>
<span class="pull-right">英文文档：<a href="https://api.jquery123.com/class-selector/" target="_blank">Class Selector (".class")</a></span>
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<article class="entry selector" id="class1"><h2 class="section-title"><span>class selector</span></h2>
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<p class="desc"><strong>描述: </strong>选择给定样式类名的所有元素。</p>
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<span class="version-details">添加的版本: <a href="/category/version/1.0/">1.0</a></span>jQuery( ".class" )</h4>
<p class="argument"><strong>class: </strong>一个用来查找的类名。一个元素可以有多个类；其中只有一个必须匹配。</p>
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<p>对于类选择器，如果浏览器支持，jQuery使用JavaScript的原生<code>getElementsByClassName()</code>函数来实现。</p>
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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">
<h4>Example: <span class="desc">找到该元素的类名为“myclass”。</span>
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<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="tag">span</span> <span class="rules">{</span></code></div></div><div class="container"><div class="line"><code>    <span class="rule"><span class="attribute">width</span>:<span class="value"> <span class="number">100</span>px;</span></span></code></div></div><div class="container"><div class="line"><code>    <span class="rule"><span class="attribute">height</span>:<span class="value"> <span class="number">40</span>px;</span></span></code></div></div><div class="container"><div class="line"><code>    <span class="rule"><span class="attribute">float</span>:<span class="value">left;</span></span></code></div></div><div class="container"><div class="line"><code>    <span class="rule"><span class="attribute">padding</span>:<span class="value"> <span class="number">10</span>px;</span></span></code></div></div><div class="container"><div class="line"><code>    <span class="rule"><span class="attribute">margin</span>:<span class="value"> <span class="number">10</span>px;</span></span></code></div></div><div class="container"><div class="line"><code>    <span class="rule"><span class="attribute">background-color</span>:<span class="value"> <span class="hexcolor">#EEEEEE</span>;</span></span></code></div></div><div class="container"><div class="line"><code>  <span class="rule">}</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> <span class="attribute">class</span>=<span class="value">"notMe"</span>&gt;</span>div class="notMe"<span class="tag">&lt;/<span class="title">div</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">div</span> <span class="attribute">class</span>=<span class="value">"myClass"</span>&gt;</span>div class="myClass"<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">span</span> <span class="attribute">class</span>=<span class="value">"myClass"</span>&gt;</span>span class="myClass"<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">script</span>&gt;</span><span class="javascript">$(<span class="string">".myClass"</span>).css(<span class="string">"border"</span>,<span class="string">"3px solid red"</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>
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<h4>Demo:</h4>
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<h4>Example: <span class="desc">查找的元素都“的myclass”和“otherclass的的”类。</span>
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<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="tag">span</span> <span class="rules">{</span></code></div></div><div class="container"><div class="line"><code>    <span class="rule"><span class="attribute">width</span>:<span class="value"> <span class="number">100</span>px;</span></span></code></div></div><div class="container"><div class="line"><code>    <span class="rule"><span class="attribute">height</span>:<span class="value"> <span class="number">40</span>px;</span></span></code></div></div><div class="container"><div class="line"><code>    <span class="rule"><span class="attribute">float</span>:<span class="value">left;</span></span></code></div></div><div class="container"><div class="line"><code>    <span class="rule"><span class="attribute">padding</span>:<span class="value"> <span class="number">10</span>px;</span></span></code></div></div><div class="container"><div class="line"><code>    <span class="rule"><span class="attribute">margin</span>:<span class="value"> <span class="number">10</span>px;</span></span></code></div></div><div class="container"><div class="line"><code>    <span class="rule"><span class="attribute">background-color</span>:<span class="value"> <span class="hexcolor">#EEEEEE</span>;</span></span></code></div></div><div class="container"><div class="line"><code>  <span class="rule">}</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> <span class="attribute">class</span>=<span class="value">"myclass"</span>&gt;</span>div class="notMe"<span class="tag">&lt;/<span class="title">div</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">div</span> <span class="attribute">class</span>=<span class="value">"myclass otherclass"</span>&gt;</span>div class="myClass"<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">span</span> <span class="attribute">class</span>=<span class="value">"myclass otherclass"</span>&gt;</span>span class="myClass"<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">script</span>&gt;</span><span class="javascript">$(<span class="string">".myclass.otherclass"</span>).css(<span class="string">"border"</span>,<span class="string">"13px solid red"</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>
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<h4>Demo:</h4>
<div class="demo code-demo"></div>
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