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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>