mirror of
https://github.com/fofolee/uTools-Manuals.git
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63 lines
6.7 KiB
HTML
63 lines
6.7 KiB
HTML
<article class="" id="post-">
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<header class="entry-header">
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<h1 class="entry-title">.length</h1>
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<div class="entry-meta">
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所属分类：<span class="category"><a href="/category/properties/">内部属性</a> > <a href="/category/properties/jquery-object-instance-properties/">jQuery 对象实例的属性</a></span>
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<span class="pull-right">英文文档：<a href="https://api.jquery123.com/length/" target="_blank">.length</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 property" id="length1"><h2 class="section-title">
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<span>length</span><span class="returns">返回: <a href="/Types/#Number">Number</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>在jQuery对象中元素的数量。</p>
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<ul class="signatures"><li class="signature"><h4 class="name">
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<span class="version-details">添加的版本: <a href="/category/version/1.0/">1.0</a></span>length</h4></li></ul>
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<div class="longdesc" id="entry-longdesc">
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<p>目前匹配的元素数量。.<a href="/size">size()</a>方法将返回相同的数字。</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><span class="desc">计算 div 数量，点击后会增加一个 div。</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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</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="tag">body</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">div</span> <span class="rules">{ <span class="rule"><span class="attribute">width</span>:<span class="value"><span class="number">50</span>px;</span></span> <span class="rule"><span class="attribute">height</span>:<span class="value"><span class="number">30</span>px;</span></span> <span class="rule"><span class="attribute">margin</span>:<span class="value"><span class="number">5</span>px;</span></span> <span class="rule"><span class="attribute">float</span>:<span class="value">left;</span></span></span></code></div></div><div class="container"><div class="line"><code> <span class="rule"><span class="attribute">background</span>:<span class="value">green;</span></span> <span class="rule">}</span></code></div></div><div class="container"><div class="line"><code> <span class="tag">span</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"></<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">span</span>></span><span class="tag"></<span class="title">span</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">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">$(document.body).click(<span class="function"><span class="keyword">function</span> <span class="params">()</span> {</span></span></code></div></div><div class="container"><div class="line"><code> $(document.body).append($(<span class="string">"<div>"</span>));</code></div></div><div class="container"><div class="line"><code> <span class="keyword">var</span> n = $(<span class="string">"div"</span>).length;</code></div></div><div class="container"><div class="line"><code> $(<span class="string">"span"</span>).text(<span class="string">"There are "</span> + n + <span class="string">" divs."</span> +</code></div></div><div class="container"><div class="line"><code> <span class="string">"Click to add more."</span>);</code></div></div><div class="container"><div class="line"><code>}).trigger(<span class="string">'click'</span>); <span class="comment">// trigger the click to start</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> |