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jQuery中scrollTop()方法用法執行個體，jqueryscrolltop
本文執行個體講述了jQuery中scrollTop()方法用法。分享給大家供大家參考。具體分析如下：
此方法返回或設定匹配元素的捲軸的垂直位移量。
文法結構一:
當scrollTop()方法不帶有參數的時候是返回匹配元素相對捲軸頂部的位移量。
複製代碼 代碼如下:$(selector).scrollTop()
執行個體代碼:
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>scrollTop()函數-幫客之家</title>
<style type="text/css">
#div1{
border:1px solid black;
width:200px;
height:200px;
overflow:auto
}
#div2{height:250px;}
#div3{
height:48px;
width:30px;
border:1px solid red;
}
</style>
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("button").click(function(){
alert($("#div1").scrollTop()+" px");
});
});
</script>
</head>
<body>
<div id="div1">
<div id="div2">
<div id="div3"></div>
</div>
</div>
<button>獲得offset值</button>
</body>
</html>
文法結構二:
當scrollTop()方法帶有參數的時候置垂直捲軸頂部位移為該值。
複製代碼 代碼如下:$(selector).scrollTop(val)
參數列表:
| 參數 | 描述 |
| val | 設定垂直捲軸值 |
執行個體代碼:
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>scrollTop()函數-幫客之家</title>
<style type="text/css">
#div1{
border:1px solid black;
width:200px;
height:200px;
overflow:auto
}
#div2{height:250px;}
#div3{
height:48px;
width:30px;
border:1px solid red;
}
</style>
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("button").click(function(){
$("#div1").scrollTop(30);
})
})
</script>
</head>
<body>
<div id="div1">
<div id="div2">
<div id="div3"></div>
</div>
</div>
<button>設定offset值</button>
</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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