uTools-Manuals/docs/jQuery/scrollTop.html

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HTML

<article class="" id="post-">
<header class="entry-header">
<h1 class="entry-title">.scrollTop()</h1>
<div class="entry-meta">
所属分类:<span class="category"><a href="/category/css/">CSS</a></span><span class="category-divider"> | </span><span class="category"><a href="/category/offset/">偏移</a></span><span class="category-divider"> | </span><span class="category"><a href="/category/manipulation/">DOM 操作</a> &gt; <a href="/category/manipulation/style-properties/">CSS 属性</a></span>
<span class="pull-right">英文文档:<a href="https://api.jquery123.com/scrollTop/" target="_blank">.scrollTop()</a></span>
</div><!-- .entry-meta -->
</header><!-- .entry-header -->
<!-- .entry-header -->
<div class="entry-content">
<div class="toc">
<h4><span>Contents:</span></h4>
<ul class="toc-list">
<li>
<a href="#scrollTop1">.scrollTop()</a><ul><li>.scrollTop()</li></ul>
</li>
<li>
<a href="#scrollTop2">.scrollTop( value )</a><ul><li>.scrollTop( value )</li></ul>
</li>
</ul>
</div><article class="entry method" id="scrollTop1"><h2 class="section-title">
<span class="name">.scrollTop()</span><span class="returns">返回: <a href="/Types/#Integer">Integer</a></span>
</h2>
<div class="entry-wrapper">
<p class="desc"><strong>描述: </strong>获取匹配的元素集合中第一个元素的当前垂直滚动条的位置或设置每个匹配元素的垂直滚动条位置。</p>
<ul class="signatures"><li class="signature" id="scrollTop">
<h4 class="name">
<span class="version-details">添加的版本: <a href="/category/version/1.2.6/">1.2.6</a></span>.scrollTop()</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>滚动条垂直位置和滚动区隐藏区域的顶部高度像素值是相同的。如果滚动条是在最顶部,或者这个元素没有可滚动的,那么这个数字是<code>0</code></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">获取段落的scrollTop。</span></h4>
<div class="syntaxhighlighter xml ">
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<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">10</span>px;</span></span><span class="rule"><span class="attribute">padding</span>:<span class="value"><span class="number">5</span>px;</span></span><span class="rule"><span class="attribute">border</span>:<span class="value"><span class="number">2</span>px solid <span class="hexcolor">#666</span>;</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>Hello<span class="tag">&lt;/<span class="title">p</span>&gt;</span><span class="tag">&lt;<span class="title">p</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">script</span>&gt;</span><span class="javascript"><span class="keyword">var</span> p = $(<span class="string">"p:first"</span>);</span></code></div></div><div class="container"><div class="line"><code>$(<span class="string">"p:last"</span>).text( <span class="string">"scrollTop:"</span> + p.scrollTop() );</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>
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</tbody>
</table>
</div>
<h4>Demo:</h4>
<div class="demo code-demo"></div>
</div></section>
</div></article><article class="entry method" id="scrollTop2"><h2 class="section-title">
<span class="name">.scrollTop( value )</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>设置每个匹配元素的垂直滚动条位置</p>
<ul class="signatures"><li class="signature" id="scrollTop-value">
<h4 class="name">
<span class="version-details">添加的版本: <a href="/category/version/1.2.6/">1.2.6</a></span>.scrollTop( value )</h4>
<ul><li>
<div><strong>value</strong></div>
<div>类型: <a href="/Types/#Number">Number</a>
</div>
<div>一个用来设置滚动条垂直位置的正整数。</div>
</li></ul>
</li></ul>
<div class="longdesc" id="entry-longdesc-1">
<p>滚动条垂直位置和滚动区隐藏区域的顶部高度像素值是相同的。<code>scrollTop</code>为每个匹配元素设置滚动条的垂直位置。</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><span class="desc">设置一个div的scrollTop。</span></h4>
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<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="class">.demo</span> <span class="rules">{</span></code></div></div><div class="container"><div class="line"><code><span class="rule"><span class="attribute">background</span>:<span class="value"><span class="hexcolor">#CCCCCC</span> none repeat scroll <span class="number">0</span> <span class="number">0</span>;</span></span></code></div></div><div class="container"><div class="line"><code><span class="rule"><span class="attribute">border</span>:<span class="value"><span class="number">3</span>px solid <span class="hexcolor">#666666</span>;</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">5</span>px;</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">5</span>px;</span></span></code></div></div><div class="container"><div class="line"><code><span class="rule"><span class="attribute">position</span>:<span class="value">relative;</span></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">200</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">100</span>px;</span></span></code></div></div><div class="container"><div class="line"><code><span class="rule"><span class="attribute">overflow</span>:<span class="value">auto;</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">p</span> <span class="rules">{ <span class="rule"><span class="attribute">margin</span>:<span class="value"><span class="number">10</span>px;</span></span><span class="rule"><span class="attribute">padding</span>:<span class="value"><span class="number">5</span>px;</span></span><span class="rule"><span class="attribute">border</span>:<span class="value"><span class="number">2</span>px solid <span class="hexcolor">#666</span>;</span></span><span class="rule"><span class="attribute">width</span>:<span class="value"><span class="number">1000</span>px;</span></span><span class="rule"><span class="attribute">height</span>:<span class="value"><span class="number">1000</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> <span class="attribute">class</span>=<span class="value">"demo"</span>&gt;</span><span class="tag">&lt;<span class="title">h1</span>&gt;</span>lalala<span class="tag">&lt;/<span class="title">h1</span>&gt;</span><span class="tag">&lt;<span class="title">p</span>&gt;</span>Hello<span class="tag">&lt;/<span class="title">p</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.demo"</span>).scrollTop(<span class="number">300</span>);</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>
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</tbody>
</table>
</div>
<h4>Demo:</h4>
<div class="demo code-demo"></div>
</div></section>
</div></article> </div>
</article>