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---
title: HTMLCollection.item
slug: Web/API/HTMLCollection/item
translation_of: Web/API/HTMLCollection/item
---
<p>{{APIRef("HTML DOM")}}</p>
<p><code>HTMLCollection.item()</code> 由位置获取元素.</p>
<h3 id="参数">参数</h3>
<dl>
<dt>index</dt>
<dd>想要被返回的Node的位置. 元素在HTML Collection中的顺序和他们在源文档的顺序保持一致。</dd>
</dl>
<h3 id="返回值">返回值</h3>
<p>指定的index的{{domxref("Node")}} , 如果index小于0或者不小于它的长度属性则返回null。</p>
<h2 id="Description">Description</h2>
<p>HTMLCollection中item( )方法返回一个编号的元素 ，在JavaScript中把HTMLCollection当成是一个是数组并用数组符号去索引十分简单。</p>
<h2 id="Example">Example</h2>
<pre class="brush: js">var c = document.images; // This is an HTMLCollection
var img0 = c.item(0); // You can use the item( ) method this way
var img1 = c[1]; // But this notation is easier and more common
</pre>
<h2 id="See_also">See also</h2>
<ul>
<li>{{domxref("NodeList.item()")}}</li>
</ul>
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