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authorPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
committerPeter Bengtsson <mail@peterbe.com>2020-12-08 14:40:17 -0500
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+---
+title: Element.scrollLeft
+slug: Web/API/Element/scrollLeft
+tags:
+ - API
+ - scrollLeft
+translation_of: Web/API/Element/scrollLeft
+---
+<p>{{ APIRef("DOM") }}</p>
+
+<p><strong><code>Element.scrollLeft</code></strong> 属性可以读取或设置元素滚动条到元素左边的距离。</p>
+
+<p>注意如果这个元素的内容排列方向({{cssxref("direction")}}) 是<code>rtl</code> (right-to-left) ,那么滚动条会位于最右侧(内容开始处),并且<code>scrollLeft</code>值为0。此时,当你从右到左拖动滚动条时,scrollLeft会从0变为负数。</p>
+
+<div class="blockIndicator warning">
+<p>在使用显示比例缩放的系统上,<code>scrollLeft</code> 可能会是一个小数。</p>
+</div>
+
+<h2 id="Syntax_and_values" name="Syntax_and_values">语法</h2>
+
+<pre class="eval">//获取滚动条到元素左边的距离
+var <var>sLeft</var> = <var>element</var>.scrollLeft;
+</pre>
+
+<p><code>sLeft</code>是一个整数,代表元素滚动条距离元素左边多少像素。</p>
+
+<pre class="eval">//设置滚动条滚动了多少像素
+<var>element</var>.scrollLeft = 10;
+</pre>
+
+<p><code>scrollLeft</code> 可以是任意整数,然而:</p>
+
+<ul>
+ <li>如果元素不能滚动(比如:元素没有溢出),那么<code>scrollLeft</code> 的值是0。</li>
+ <li>如果给<code>scrollLeft</code> 设置的值小于0,那么<code>scrollLeft</code> 的值将变为0。</li>
+ <li>如果给<code>scrollLeft</code> 设置的值大于元素内容最大宽度,那么<code>scrollLeft</code> 的值将被设为元素最大宽度。</li>
+</ul>
+
+<h2 id="示例">示例</h2>
+
+<h3 id="HTML">HTML</h3>
+
+<pre class="brush: html">&lt;div id="container"&gt;
+ &lt;div id="content"&gt;Click the button to slide right!&lt;/div&gt;
+&lt;/div&gt;
+
+&lt;button id="slide" type="button"&gt;Slide right&lt;/button&gt;</pre>
+
+<h3 id="CSS">CSS</h3>
+
+<pre class="brush: css">#container {
+ width: 100px;
+ height: 100px;
+ border: 1px solid #ccc;
+ overflow-x: scroll;
+}
+
+#content {
+ width: 250px;
+ background-color: #ccc;
+}</pre>
+
+<h3 id="JavaScript">JavaScript</h3>
+
+<pre class="brush: js">const button = document.getElementById('slide');
+
+button.onclick = function () {
+ document.getElementById('container').scrollLeft += 20;
+};</pre>
+
+<h3 id="结构">结构</h3>
+
+<p>{{EmbedLiveSample("示例")}}</p>
+
+<h2 id="规范">规范</h2>
+
+<table class="standard-table">
+ <tbody>
+ <tr>
+ <th scope="col">Specification</th>
+ <th scope="col">Status</th>
+ <th scope="col">Comment</th>
+ </tr>
+ <tr>
+ <td>{{SpecName('CSSOM View', '#dom-element-scrollleft', 'scrollLeft')}}</td>
+ <td>{{Spec2("CSSOM View")}}</td>
+ <td></td>
+ </tr>
+ </tbody>
+</table>
+
+<h2 id="浏览器兼容">浏览器兼容</h2>
+
+<p>{{Compat("api.Element.scrollLeft")}}</p>
+
+<h2 id="参见">参见</h2>
+
+<ul>
+ <li><a href="https://msdn.microsoft.com/en-us/library/hh781509(v=vs.85).aspx" title="MSDN Measuring Element Dimension and Location">MSDN's Measuring Element Dimension and Location</a></li>
+ <li>{{domxref("Element.scrollTop")}}</li>
+ <li>{{domxref("Element.scrollTo()")}}</li>
+</ul>