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84 lines
No EOL
3.2 KiB
HTML
84 lines
No EOL
3.2 KiB
HTML
<!DOCTYPE html>
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<html lang='en'><head><meta http-equiv='content-type' content='text/html; charset=UTF-8' /></head><body>
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<div class="ui-page">
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<div class="ui-header">
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<h1>.eq()</h1>
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</div>
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<div class="ui-content ui-body ui-body-c" id="eq1">
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<h2 class="jq-clearfix roundTop section-title">
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<span class="name">.eq( index )</span> <span class="returns">Returns: <a class="return" href="http://docs.jquery.com/Types#jQuery">jQuery</a></span>
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</h2>
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<div class=" entry-details">
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<p class="desc"><strong>Description: </strong>Reduce the set of matched elements to the one at the specified index.</p>
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<ul class="signatures">
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<li class="signature" id="eq-index">
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<h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.1.2/">1.1.2</a></span>.eq( index )</h4>
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<p class="arguement"><strong>index</strong>An integer indicating the 0-based position of the element. </p>
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</li>
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<li class="signature" id="eq--index">
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<h4 class="name">
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<span class="versionAdded">version added: <a href="/category/version/1.4/">1.4</a></span>.eq( -index )</h4>
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<p class="arguement"><strong>-index</strong>An integer indicating the position of the element, counting backwards from the last element in the set. </p>
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</li>
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</ul>
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<div class="longdesc">
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<p>Given a jQuery object that represents a set of DOM elements, the <code>.eq()</code> method constructs a new jQuery object from one of the matching elements. The supplied index identifies the position of this element in the set.</p>
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<p>Consider a page with a simple list on it:</p>
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<pre>
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<ul>
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<li>list item 1</li>
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<li>list item 2</li>
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<li>list item 3</li>
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<li>list item 4</li>
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<li>list item 5</li>
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</ul>
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</pre>
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<p>We can apply this method to the set of list items:</p>
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<pre>
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$('li').eq(2).css('background-color', 'red');
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</pre>
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<p>The result of this call is a red background for item 3. Note that the supplied index is zero-based, and refers to the position of the element within the jQuery object, not within the DOM tree.</p>
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<p>If a negative number is provided, this indicates a position starting from the end of the set, rather than the beginning. For example:</p>
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<pre>
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$('li').eq(-2).css('background-color', 'red');
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</pre>
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<p>This time list item 4 is turned red, since it is two from the end of the set.</p>
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</div>
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<h3>Example:</h3>
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<div id="entry-examples" class="entry-examples"><div id="example-0">
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<h4><span class="desc">Turn the div with index 2 blue by adding an appropriate class.</span></h4>
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<pre><code class="example demo-code"><!DOCTYPE html>
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<html>
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<head>
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<style>
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div { width:60px; height:60px; margin:10px; float:left;
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border:2px solid blue; }
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.blue { background:blue; }
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</style>
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<script src="http://code.jquery.com/jquery-latest.js"></script>
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</head>
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<body>
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<div></div>
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<div></div>
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<div></div>
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<div></div>
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<div></div>
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<div></div>
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<script>
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$("div").eq(2).addClass("blue");
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</script>
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</body>
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</html></code></pre>
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<h4>Demo:</h4>
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<div class="demo code-demo"></div>
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</div></div>
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</div>
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</div>
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</div>
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</body></html> |