jquery中 $.expr使用实例介绍

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我是靠谱客的博主活力电灯胆，最近开发中收集的这篇文章主要介绍jquery中 $.expr使用实例介绍，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

复制代码代码如下:

 
<!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> new document </title> 
<meta name="generator" content="editplus" /> 
<meta name="author" content="" /> 
<meta name="keywords" content="" /> 
<meta name="description" content="" /> 
</head> 

<body> 
<!DOCTYPE html> 
<html lang="en"> 
<head> 
<meta charset="UTF-8" /> 
<title></title> 
<link type="text/css" href="../../themes/base/jquery.ui.all.css" rel="stylesheet" /> 
<script type="text/javascript" src="../../jquery-1.4.2.js"></script> 
<script type="text/javascript" src="../../external/jquery.bgiframe-2.1.1.js"></script> 
<script type="text/javascript" src="../../ui/jquery.ui.core.js"></script> 
<script type="text/javascript" src="../../ui/jquery.ui.widget.js"></script> 
<script type="text/javascript" src="../../ui/jquery.ui.mouse.js"></script> 
<script type="text/javascript" src="../../ui/jquery.ui.draggable.js"></script> 
<script type="text/javascript" src="../../ui/jquery.ui.position.js"></script> 
<script type="text/javascript" src="../../ui/jquery.ui.resizable.js"></script> 
<script type="text/javascript" src="../../ui/jquery.ui.dialog.js"></script> 
<link type="text/css" href="../demos.css" rel="stylesheet" /> 
<script type="text/javascript"> 
$(function() { 
//初始测试数据 
var init=function(){ 
$("#con1").add("#con3").data("key","10001"); 
}; 
init(); 
var select="mytest"; 
var name="key"; 
//定义一个新选择器 
$.expr[ ":" ][ select ] = function( elem ) { 
return !!$.data( elem, name ); 
}; 
//使用 
$("div:mytest").each(function(){ 
alert(this.id);//结果:con1 con3 
}) 
}); 
</script> 
</head> 
<body> 
<div id="con1"></div> 
<div id="con2"></div> 
<div id="con3"></div> 
</body> 
</html> 

</body> 
</html> 