--- 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>