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Example analysis of attribute filter selector usage in JQuery_jquery

WBOY
WBOYOriginal
2016-05-16 15:58:411403browse

The example in this article describes the usage of attribute filter selector in JQuery. Share it with everyone for your reference. The details are as follows: 

<!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>属性过滤选择器</title>
<style type="text/css">
div{width:200px;border:1px solid red;margin:10px auto;}  
</style>
<script src="jquery-1.6.2.min.js" type="text/javascript"></script>
<script type="text/javascript">
$(function () {
 //==========举例1================
 //: $("div[id]") ; 说明: 匹配包含给定属性的元素. 例子中是选取了所有带”id”属性的div标签.
 showElements($("div[id]"));
 //==========举例2================
 //$("div[myTag]='tt2') 匹配给定的属性是某个特定值的元素
 //匹配div中myTag属性为tt2的div
 alert($("div[myTag='tt2']").attr("myTag")); //注意中括号的结束位置
 //==========举例3================
 //[attribute!=value]
 //用法: $(”input[name!='newsletter']“).attr(”checked”, true); 返回值 集合元素
 //说明: 匹配所有不含有指定的属性，或者属性不等于特定值的元素.
 //此选择器等价于:not([attr=value]),要匹配含有特定属性但不等于特定值的元素,
 //请使用[attr]:not([attr=value]).之前看到的 :not 派上了用场.
 //...<1> 查找div中myTag属性不为tt1的所有div 会找到两个
 //showElements($("div[myTag!='tt1']"));
 //...<2> 查找div中包含myTag属性，并且myTag属性不等于tt1的div
 showElements($("div[myTag]:not([myTag='tt1'])")); //注意中括号和括号的方式
 //==========举例4================
 //[attribute^=value] 匹配给定的属性是以某些值开始的元素
 //...<1>查找myTag属性以tt2开头的所有div
 showElements($("div[myTag^='tt2']"));
 //==========举例5================
 //[attribute$=value] 匹配给定的属性是以某些值结尾的元素.
 //...<1>查找myTag属性以3结尾的所有div
 showElements($("div[myTag$='3']"));
 //==========举例6================
 //[attribute*=value] 匹配给定的属性是以包含某些值的元素.
 //...<1>查找myTag属性包含tt的所有div
 showElements($("div[myTag*='tt']"));
 //==========举例7================
 //用法: $(”input[id][name$=‘man']“) 返回值 集合元素
 //复合属性选择器,需要同时满足多个条件时使用.又是一个组合,这种情况我们实际使用的时候很常用.
 //这个例子中选择的是所有含有 id 属性,并且它的 name 属性是以 man 结尾的元素.
 //...<1>查找包含id属性，并且myTag属性不为tt2的所有div
 showElements($("div[id][myTag!='tt2']"));
});
function showElements(elements) {
 var output = "";
 for (var i = 0; i < elements.length; i++) {
  if (output == "") {
   output = elements.eq(i).html();
  }
  else {
   output += "\r\n" + elements.eq(i).html();
  }
 }
 alert(output);
}
</script>
</head>
<body>
<div>我是没有id的DIV</div>
<div id="div1" myTag="tt1">我是id为div1的DIV myTag为tt1</div>
<div id="div2" myTag="tt2">我是id为div2的DIV myTag为tt2</div>
<div id="div3" myTag="tt23">我是id为div2的DIV myTag为tt23</div>
<div id="div4" myTag="tt33">我是id为div2的DIV myTag为tt33</div>
</body>
</html>

I hope this article will be helpful to everyone’s jQuery programming.

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