Detailed explanation of:has(selector) selector in jQuery
Overview
Match elements that contain elements matched by the selector
Parameters
selectorSelectorV1.1.4
A selector for filtering
Example
Description:
Add a text class to all div elements containing p elements
HTML code:
<div><p>Hello</p></div> <div>Hello again!</div>
jQuery Code:
$("div:has(p)").addClass("test"); Result:
[ <div class="test"><p>Hello</p></div> ]
The definition of this selector may be a bit confusing. In layman’s terms, it means that if an element contains a selector (selector), it matches element, then this element will be matched. For example:
$("div:has(p)")The above selector will match div elements containing p elements.
This selector is generally used in conjunction with other selectors, such as Class selector and Element selector, etc. For example:
$("div:has(p)").css("color","blue")The above code sets the font color in the div element containing the p element to blue.
If not used with other selectors, the default state is used with the * selector, for example, $(":has") is equivalent to $("*:has").
Parameter list:
Parameter .
Example code:
Example 1:
<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="http://www.jb51.net/" />
<title></title>
<style type="text/css">
div
{
border:1px solid green;
height:50px;
}
span{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(){
$("button").click(function(){
$("div:has(span)").css("border","1px solid red")
})
})
</script>
</head>
<body>
<div>我不含span</div>
<div> <span>我是span</span></div>
<button>点击查看效果</button>
</body>
</html>Example 2:
<!DOCTYPE html>
<html>
<head>
<meta charset=" utf-8">
<meta name="author" content="http://www.jb51.net/" />
<title></title>
<style type="text/css">
div
{
border:1px solid green;
height:50px;
}
span{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(){
$("button").click(function(){
$("*:has(span)").css("border","1px solid red")
})
})
</script>
</head>
<body>
<div>我不含span</div>
<div><span>我是span</span></div>
<p><span>我是span</span></p>
<button>点击查看效果</button>
</body>
</html>Since the above code does not specify a selector used in conjunction with the :has selector, so It is used with the * selector by default, so the above code can set the border color of all elements containing all span elements to red.
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