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---
title: Document.dir
slug: Web/API/Document/dir
translation_of: Web/API/Document/dir
---
<p>{{ApiRef("")}}</p>
<p>Document.dir的本质是DOMString，代表了文档的文字朝向，是从左到右(默认)还是从右到左。</p>
<p>'rtl'(right to left)代表从右到左，'ltr'(left to right)代表从左到右。</p>
<h2 id="语法">语法</h2>
<pre class="syntaxbox">console.log(document.dir);// "" (译者添加)
document.dir = "ltr"//(默认);
document.dir = "rtl";
<em>dirStr</em> = <em>document.</em>dir;
<em>document.dir</em> = <em>dirStr;</em>
</pre>
<p>（译者注：第一次调用该属性时，可能返回空字符串""，译者环境：chrome，版本 53.0.2785.116 m）</p>
<h2 id="Specifications" name="Specifications">说明</h2>
<table class="standard-table">
<thead>
<tr>
<th scope="col">规范</th>
<th scope="col">状态</th>
<th scope="col">评论</th>
</tr>
</thead>
<tbody>
<tr>
<td>{{SpecName("HTML WHATWG", "dom.html#the-dir-attribute:dom-dir", "Document.dir")}}</td>
<td>{{Spec2("HTML WHATWG")}}</td>
<td>Initial specification</td>
</tr>
</tbody>
</table>
<h2 id="浏览器兼容性">浏览器兼容性</h2>
{{Compat("api.Document.dir")}}
<h2 id="参见">参见</h2>
<ul>
<li><a class="external" href="http://msdn.microsoft.com/en-us/library/ms533731.aspx" rel="freelink">http://msdn.microsoft.com/en-us/library/ms533731.aspx</a></li>
</ul>
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