JQuery里面的幾種選擇器查找滿足條件的元素$("#控件ID")

2019-11-20 23:42:25

字體：大中小

供稿：網(wǎng)友

樣式：$(function (){
$("要選擇的標(biāo)簽").click(function (){alert ("彈出對(duì)話框內(nèi)容");})
});
第一種：Id選擇器
用法：

 
<head> 
<title></title> 
<script src ="Jq/jquery-1.4.2.js" type ="text/javascript" ></script> 
<script type ="text/javascript"> 
$(function (){ 
$("p").click(function (){alert ("小P");}) 
}); 
</script> 
</head> 

<body> 
<input type="button" value ="PlayGame" id="btnClick" /> 
<p>第一個(gè)</p> 
<p>第二個(gè)</p> 
</body> 

說(shuō)明：對(duì)所有<P>標(biāo)簽點(diǎn)擊都有彈出對(duì)話框的提示
第二種：CSS選擇器

復(fù)制代碼代碼如下:

 
<head> 
<title></title> 
<script src ="Jq/jquery-1.4.2.js" type ="text/javascript" ></script> 
<script type ="text/javascript"> 
$(function (){ 
$(".warning").click(function (){alert("這是警告信息");}); 
}); 
</script> 
<style type="text/css" > 
.warning{background-color :Yellow ;color :Red ;} 
</style> 
</head> 

<body> 
<p>沒(méi)有警告</p> 
<div class ="warning " >請(qǐng)帶好小孩</div> 
<p class ="warning ">再次警告你</p> 
<input class ="warning " type ="button" value ="別點(diǎn)啊" /> 
</body> 

說(shuō)明：對(duì)所有CSS樣式為：.warning點(diǎn)擊都有彈出對(duì)話框的提示
第三種：多條件選擇器

復(fù)制代碼代碼如下:

 
<head> 
<title></title> 
<script src ="Jq/jquery-1.4.2.js"></script> 
<script type ="text/javascript" > 
$(function (){ 
$(".docc,p,#txt1").click(function (){alert ("不要上當(dāng)啊");}) 
}) 
</script> 
<style type="text/css" > 
.docc{background-color :Fuchsia ;color :Olive ;} 
</style> 
</head> 

<body> 
<p>電腦熱賣</p> 
<input type ="text" id="txt1" /> 
<input class ="docc" type ="button" value ="上當(dāng)" /> 
<input type ="checkbox" /> 
</body> 