子选择器(“parent > child”)
描述:选择所有父元素的直系子元素。
例子:
<!doctype html>
<html lang='zh'>
<head>
<meta charset='utf-8'>
<title>child demo</title>
<style type="text/css">
body{
font-size: 14px;
}
</style>
<script src="http://code.jquery.com/jquery-1.9.1.js"></script>
</head>
<body>
<ul class="topnav">
<li>Item 1</li>
<li>Item 2
<ul>
<li>Nested item1</li>
<li>Nested item2</li>
<li>Nested item3</li>
</ul>
</li>
<li>item 3</li>
</ul>
<script type="text/javascript">
$("ul.topnav > li").css("border", "3px double red");
</script>
</body>
</html>