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jQuery: Add class to every other matching element

Posted on 2012-04-11
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Last Modified: 2012-04-13
Using jQuery, how can I add a class to every other matching element?

In the example below, I want the class "even" to be added to every second <li>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>Demo</title>

<script type="text/javascript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.7/jquery.min.js"></script>
<script type="text/javascript">

$(document).ready(function() {

});

</script>
<style type="text/css">
.even {
color: red;
background: yellow;
}
</style>


</head>
<body>

<div>
 <ul>
  <li>Item 1</i>
  <li>Item 2 should be red</i>
  <li>Item 3</i>
  <li>Item 4 should be red</i>
  <li>Item 5</i>
  <li>Item 6 should be red</i>
  <li>Item 7</i>
  <li>Item 8 should be red</i>

 </ul>
</div>

</body>
</html>

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Question by:hankknight
1 Comment
 
LVL 82

Accepted Solution

by:
leakim971 earned 500 total points
ID: 37835774
Check this page : http://jsfiddle.net/KrXMQ/1/

$(document).ready(function() {
    $("div ul li:odd").addClass("even");
});¿

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first one index is zero (even)...
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