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+---
+title: Document.createRange()
+slug: Web/API/Document/createRange
+tags:
+  - API
+  - Range
+translation_of: Web/API/Document/createRange
+---
+<div>{{APIRef("DOM")}}</div>
+
+<p>返回一个 {{domxref("Range")}} 对象。</p>
+
+<h2 id="Syntax" name="Syntax">语法</h2>
+
+<pre class="syntaxbox">range = document.createRange();
+</pre>
+
+<p><code>range</code> 是一个 {{domxref("Range")}} 对象。</p>
+
+<h2 id="Example" name="Example">例子</h2>
+
+<pre class="brush:js">var range = document.createRange();
+
+range.setStart(startNode, startOffset);
+range.setEnd(endNode, endOffset);
+</pre>
+
+<h2 id="Notes" name="Notes">注意</h2>
+
+<p>一旦一个 Range 对象被建立，在使用他的大多数方法之前需要去设置他的临界点。</p>
+
+<h2 id="Specification" name="Specification">Specification</h2>
+
+<ul>
+ <li><a class="external" href="http://www.w3.org/TR/DOM-Level-2-Traversal-Range/ranges.html#Level2-DocumentRange-method-createRange">DOM Level 2 Range: DocumentRange.createRange</a></li>
+</ul>