jQuery中add()方法用法实例
本文实例讲述了jQuery中add()方法用法。分享给大家供大家参考。具体分析如下：
此函数在匹配元素中添加与表达式匹配的元素。
add()函数返回的结果将始终以元素在HTML文档中出现的顺序来排序，而不再是简单的添加。
语法:
语法一:
$(selector).add(expr,context)
实例:
实例一:
将span元素添加的匹配元素中去，并将它们的字体颜色设置为绿色。
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8"/>
<metaname="author"content="https://www.nhooo.com/"/>
<title>毛票票</title>
<styletype="text/css">
ul
{
width:200px;
height:200px;
border:1pxsolidblue;
}
div
{
height:300px;
}
</style>
<scripttype="text/javascript"src="mytest/jQuery/jquery-1.8.3.js"></script>
<scripttype="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>
实例二:
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8"/>
<metaname="author"content="https://www.nhooo.com/"/>
<title>毛票票</title>
<styletype="text/css">
ul
{
width:200px;
height:200px;
border:1pxsolidblue;
}
div
{
height:300px;
}
</style>
<scripttype="text/javascript"src="mytest/jQuery/jquery-1.8.3.js"></script>
<scripttype="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>
语法二:
$(selector).add(element)
参数列表:
实例:
实例一:
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8"/>
<metaname="author"content="https://www.nhooo.com/"/>
<title>毛票票</title>
<styletype="text/css">
ul
{
width:200px;
height:200px;
border:1pxsolidblue;
}
div
{
height:300px;
}
</style>
<scripttype="text/javascript"src="mytest/jQuery/jquery-1.8.3.js"></script>
<scripttype="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>
<spanid="myspan">我是span</span>
</ul>
<span>我是span</span></div>
</body>
</html>
实例二:
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8"/>
<metaname="author"content="https://www.nhooo.com/"/>
<title>毛票票</title>
<styletype="text/css">
ul
{
width:200px;
height:200px;
border:1pxsolidblue;
}
div
{
height:300px;
}
</style>
<scripttype="text/javascript"src="mytest/jQuery/jquery-1.8.3.js"></script>
<scripttype="text/javascript">
$(document).ready(function(){
$("p").add($("#myspan")).css("color","green")
})
</script>
</head>
<body>
<div>
<ul>
<li>
<p>我是p</p>
</li>
<spanid="myspan">我是span</span>
</ul>
<span>我是span</span></div>
</body>
</html>
语法三:
$(selector).add(html)
参数列表:
实例:
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8"/>
<metaname="author"content="https://www.nhooo.com/"/>
<title>毛票票</title>
<scripttype="text/javascript"src="mytest/jQuery/jquery-1.8.3.js"></script>
<scripttype="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>
希望本文所述对大家的jQuery程序设计有所帮助。