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jQuery中prevAll()方法用法執行個體，jqueryprevall
本文執行個體講述了jQuery中prevAll()方法用法。分享給大家供大家參考。具體分析如下：
此方法尋找匹配元素集合之前所有的同輩元素。
同輩元素集合可以通過選取器進行篩選。
文法結構:
複製代碼 代碼如下:$("selector").prevAll(expr)
參數列表:
| 參數 | 描述 |
| expr | 可選。用於過濾的運算式。 |
執行個體代碼:
執行個體一:
複製代碼 代碼如下:
<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="http://www.bkjia.com/" />
<title>幫客之家</title>
<style type="text/css">
.father{
height:200px;
width:200px;
border:1px solid blue;
}
</style>
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(".father div").prevAll().css("color","blue")
})
</script>
</head>
<body>
<div class="father">
<p>我是p元素</p>
<span>我是span元素</span>
<p>我是p元素</p>
<div>我是div元素</div>
</div>
</body>
</html>
執行個體二:
複製代碼 代碼如下:
<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="http://www.bkjia.com/" />
<title>幫客之家</title>
<style type="text/css">
.father{
height:200px;
width:200px;
border:1px solid blue;
}
</style>
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$(".father div").prevAll("span").css("color","blue")
})
</script>
</head>
<body>
<div class="father">
<p>我是p元素</p>
<span>我是span元素</span>
<p>我是p元素</p>
<div>我是div元素</div>
</div>
</body>
</html>
希望本文所述對大家的jQuery程式設計有所協助。
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