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<!DOCTYPE html>
<html lang='en'><head><meta http-equiv='content-type' content='text/html; charset=UTF-8' /></head><body>
<div class="entry-content">
<div class="entry-title roundTop">
<h1 class="jq-clearfix">.eq()</h1>
<div class="entry-meta jq-clearfix">
Categories:
<span class="category"><a href="http://api.jquery.com/category/traversing/" title="View all posts in Traversing">Traversing</a> > <a href="http://api.jquery.com/category/traversing/filtering/" title="View all posts in Filtering">Filtering</a></span>
</div>
</div>
<div id="eq1" class="entry method">
<h2 class="jq-clearfix roundTop section-title">
<span class="name">.eq( index )</span> <span class="returns">Returns: <a class="return" href="http://api.jquery.com/Types/#jQuery">jQuery</a></span>
</h2>
<div class="jq-box roundBottom entry-details">
<p class="desc"><strong>Description: </strong>Reduce the set of matched elements to the one at the specified index.</p>
<ul class="signatures">
<li class="signature" id="eq-index">
<h4 class="name">
<span class="versionAdded">version added: <a href="/category/version/1.1.2/">1.1.2</a></span>.eq( index )</h4>
<p class="arguement"><strong>index</strong>An integer indicating the 0-based position of the element. </p>
</li>
<li class="signature" id="eq--index">
<h4 class="name">
<span class="versionAdded">version added: <a href="/category/version/1.4/">1.4</a></span>.eq( -index )</h4>
<p class="arguement"><strong>-index</strong>An integer indicating the position of the element, counting backwards from the last element in the set. </p>
</li>
</ul>
<div class="longdesc">
<p>Given a jQuery object that represents a set of DOM elements, the <code>.eq()</code> method constructs a new jQuery object from one element within that set. The supplied index identifies the position of this element in the set. </p>
<p>Consider a page with a simple list on it:</p>
<pre>
<ul>
<li>list item 1</li>
<li>list item 2</li>
<li>list item 3</li>
<li>list item 4</li>
<li>list item 5</li>
</ul>
</pre>
<p>We can apply this method to the set of list items:</p>
<pre>
$('li').eq(2).css('background-color', 'red');
</pre>
<p>The result of this call is a red background for item 3. Note that the supplied index is zero-based, and refers to the position of the element within the jQuery object, not within the DOM tree.</p>
<p>Providing a negative number indicates a position starting from the end of the set, rather than the beginning. For example:</p>
<pre>
$('li').eq(-2).css('background-color', 'red');
</pre>
<p>This time list item 4 is turned red, since it is two from the end of the set.</p>
<p>If an element cannot be found at the specified zero-based index, the method constructs a new jQuery object with an empty set and a <code>length</code> property of 0. </p>
<pre>
$('li').eq(5).css('background-color', 'red');
</pre>
<p>Here, none of the list items is turned red, since <code>.eq(5)</code> indicates the sixth of five list items.</p>
</div>
<h3>Example:</h3>
<div class="entry-examples" id="entry-examples"><div id="example-0">
<h4><span class="desc">Turn the div with index 2 blue by adding an appropriate class.</span></h4>
<pre class="prettyprint"><code class="example demo-code"><!DOCTYPE html>
<html>
<head>
<style>
div { width:60px; height:60px; margin:10px; float:left;
border:2px solid blue; }
.blue { background:blue; }
</style>
<script src="http://code.jquery.com/jquery-1.7rc2.js"></script>
</head>
<body>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<div></div>
<script>
$("body").find("div").eq(2).addClass("blue");
</script>
</body>
</html></code></pre>
<h4>Demo:</h4>
<div class="demo code-demo"></div>
</div></div>
</div>
</div>
</div>
</body></html>
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