jQuery - Selector: Custom Selectors Step By Step Tutorial

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jQuery - Selector: Custom Selectors

Tag: jQuery, $(), factory, function, selectors, custom selectors Category: JavaScript
post: 21 Mar 2008 read: 537

jQuery Selector Step By Step Tutorial - Part 5: jQuery adds its own custom selectors. It wide variety of CSS and XPath selectors. The syntax is the same as the CSS pseudo-class syntax, where the selectors starts with a colon (:). For practice, we will style alternate rows. For this job, we use two custom selectors in the jQuery library, :odd and :even. Let's do it.

First, create a html document named "customselector.html". enter with following code:


<!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>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Custom Selectors</title>
<link rel="stylesheet" href="custom-song.css" type="text/css" media="screen">
<script src="jquery.js" type="text/javascript"></script>
<script src="custom-song.js" type="application/javascript"></script>
</head>

<body>

<table>
  <tr>
    <td>Title</td>
    <td>Singer</td>    
  </tr>
  <tr>
    <td>Yesterday</td>
    <td>Beatles</td>    
  </tr>  
  <tr>
    <td>Kiss Me Quick</td>
    <td>Elvis</td>    
  </tr>  
  <tr>
    <td>Ben</td>
    <td>Michael Jackson</td>    
  </tr>  
  <tr>
    <td>Hei, Jude!</td>
    <td>Beatles</td>    
  </tr>  
</table>

</body>
</html>

Then, create a file named "custom-song.css". Enter with following code:


.odd{
  background-color:#3399FF;
}
.even{
  background-color:#FFFFCC;
}

Last, create a file named "custom-song.js". Enter with jQuery syntax like this:


$(document).ready(function(){
  $('tr:odd').addClass('odd');	
  $('tr:even').addClass('even');	  
});

Now, point your browser to customselector.html. You may get like this:

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jQuery - Selector: Custom Selectors