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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>