本文實例講述了jQuery中add()方法用法。分享給大家供大家參考。具體分析如下：
此函數在匹配元素中添加與表達式匹配的元素。
add()函數返回的結果將始終以元素在HTML文檔中出現的順序來排序，而不再是簡單的添加。
語法:
語法一:
$(selector).add(expr,context)
| 參數 | 描述 |
| expr | 可選。用于匹配元素的選擇器字符串。 |
| context | 可選。作為待查找的 DOM 元素集、文檔或 jQuery 對象。 |
實例:
實例一:
將span元素添加的匹配元素中去，并將它們的字體顏色設置為綠色。
<!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" />
<meta name="author" content="http://www.49028c.com/" />
<title>武林網</title>
<style type="text/css">
ul
{
width:200px;
height:200px;
border:1px solid blue;
}
div
{
height:300px;
}
</style>
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("p").add("span").css("color","green")
})
</script>
</head>
<body>
<div>
<ul>
<li>
<p>我是p</p>
</li>
<span>我是span</span>
</ul>
<span>我是span</span> </div>
</body>
</html>
實例二:
<!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" />
<meta name="author" content="http://www.49028c.com/" />
<title>武林網</title>
<style type="text/css">
ul
{
width:200px;
height:200px;
border:1px solid blue;
}
div
{
height:300px;
}
</style>
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("p").add("span","ul").css("color","green")
})
</script>
</head>
<body>
<div>
<ul>
<li>
<p>我是p</p>
</li>
<span>我是span</span>
</ul>
<span>我是span</span> </div>
</body>
</html>
語法二:
$(selector).add(element)
參數列表:
| 參數 | 描述 |
| element | 可選。被添加的DOM元素或者jQuery元素。 |
實例:
實例一:
<!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" />
<meta name="author" content="http://www.49028c.com/" />
<title>武林網</title>
<style type="text/css">
ul
{
width:200px;
height:200px;
border:1px solid blue;
}
div
{
height:300px;
}
</style>
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("p").add(document.getElementById("myspan")).css("color","green")
})
</script>
</head>
<body>
<div>
<ul>
<li>
<p>我是p</p>
</li>
<span id="myspan">我是span</span>
</ul>
<span>我是span</span> </div>
</body>
</html>
實例二:
<!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" />
<meta name="author" content="http://www.49028c.com/" />
<title>武林網</title>
<style type="text/css">
ul
{
width:200px;
height:200px;
border:1px solid blue;
}
div
{
height:300px;
}
</style>
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(document).ready(function(){
$("p").add($("#myspan")).css("color","green")
})
</script>
</head>
<body>
<div>
<ul>
<li>
<p>我是p</p>
</li>
<span id="myspan">我是span</span>
</ul>
<span>我是span</span> </div>
</body>
</html>
語法三:
$(selector).add(html)
參數列表:
| 參數 | 描述 |
| html | 可選。被添加的html代碼片段。 |
實例:
<!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" />
<meta name="author" content="http://www.49028c.com/" />
<title>武林網</title>
<script type="text/javascript" src="mytest/jQuery/jquery-1.8.3.js"></script>
<script type="text/javascript">
$(document).ready(function(){
alert($("p").add("<span>新添加的</span>").length);
})
</script>
</head>
<body>
<div>
<ul>
<li>
<p>我是p</p>
</li>
</ul>
</body>
</html>
希望本文所述對大家的jQuery程序設計有所幫助。
