此方法用于在选择器的基础之上搜索所有与指定表达式匹配的元素,这个函数是找出正在处理的元素的后代元素的好方法
此方法可以算作是与children()方法相对应的一种方法...
实例:
<html lang='zh-cn'>
<head>
<title>Insert you title</title>
<meta http-equiv='description' content='this is my page'>
<meta http-equiv='keywords' content='keyword1,keyword2,keyword3'>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<script type='text/javascript' src='./js/jquery-1.12.1.min.js'></script>
<style type="text/css">
*{margin:0;padding:0;}
html{font:400 15px/1.2em 'Courier New';color:#666;750px;margin:25px auto;}
div > p{white-space: pre-wrap;margin:15px 0;}
div >*{text-indent:8px;}
.hover{color:#FF96EC;}
</style>
<script type='text/javascript'>
$(function(){
$('#demo').find($('p')).addClass('hover');
});
</script>
</head>
<body>
<div id='demo'>
<p>This is a p tag text presentation.</p>
<p>This is a p tag text presentation.</p>
<p>This is a p tag text presentation.</p>
<div class='selectorDemoFirst' style='border:1px solid #925CE9;'>
<p>This is a p tag text presentation.</p>
<p>This is a p tag text presentation.</p>
</div>
<p>This is a p tag text presentation.</p>
<div class='selectorDemoSecond' style='border:1px solid #999;margin-bottom: 45px;'>
<span>This is a span tag text presentation</span>
<p>This is a p tag text presentation.</p>
</div>
<div class='selectorDemoSecond' style='border:1px solid #925CE9;'>
<span>This is a span tag text presentation</span>
<p>This is a p tag text presentation.</p>
<span style='padding:8px;'>This is a span tag text presentation</span>
</div>
<p>This is a p tag text presentation.</p>
</div>
</body>
</html>