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Analysis of examples using the prevUntil() method in jQuery

巴扎黑Original: 2017-06-24 10:05:131054browse

This article mainly introduces the usage of prevUntil() method in jQuery. The example analyzes the usage skills of finding all peer elements before matching elements according to conditions. Friends in need can refer to it

The example in this article describes the usage of the prevUntil() method in jQuery. Share it with everyone for your reference. The specific analysis is as follows:

This function searches for all sibling elements before the matching element until it encounters an exprexpression, DOM element or jQuery element that matches up to that element.
You can use optional expressions to filter the collection of sibling elements.

Note: Ancestor elements do not contain elements matching expr expressions, DOM elements or jQuery elements.

Grammar:

Grammar 1:

The code is as follows:

$(selector).prevUntil(expr,filter)

Parameter list:

实例:

实例一:

代码如下:

<!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.jb51.net/" />
<title>脚本之家</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 p").prevUntil(".firstp").css("color","blue")
    })
</script>
</head>
<body>
<p class="father">
  <p class="firstp">我是p元素</p>
  <span>我是span元素</span>
  <p>我是p元素</p>
  <p>我是p元素</p>
</p>
</body>
</html>

实例二:

代码如下:

<!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.jb51.net/" />
<title>脚本之家</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 p").prevUntil(".firstp","span").css("color","blue")
    })
</script>
</head>
<body>
<p class="father">
  <p class="firstp">我是p元素</p>
  <span>我是span元素</span>
  <p>我是p元素</p>
  <p>我是p元素</p>
</p>
</body>
</html>

语法二:

代码如下:

$(selector).prevUntil(element,filter)

参数列表:

##Parameter	Description
expr	Optional. Expression used to filter ancestor elements.
filter	Optional. Used to filter the obtained collection of ancestor elements.

参数	描述
element	可选。用于筛选祖先元素的DOM元素或者jQuery元素。
filter	可选。用于对取得的祖先元素集合进行筛选。

实例:

实例一:

代码如下:

<!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.jb51.net/" />
<title>脚本之家</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 p").prevUntil(document.getElementById("firstp")).css("color","blue")
    })
</script>
</head>
<body>
<p class="father">
  <p id="firstp">我是p元素</p>
  <span>我是span元素</span>
  <p>我是p元素</p>
  <p>我是p元素</p>
</p>
</body>
</html>

实例二:

代码如下:

<!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.jb51.net/" />
<title>脚本之家</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 p").prevUntil(document.getElementById("firstp"),"span").css("color","blue")
    })
</script>
</head>
<body>
<p class="father">
  <p id="firstp">我是p元素</p>
  <span>我是span元素</span>
  <p>我是p元素</p>
  <p>我是p元素</p>
</p>
</body>
</html>

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