jQuery ??? ???
?? ???
$(s1 s2) [Father and Son]
?? ???: s1 ??? ?? s2 ?? ????(??? ????)
$ (" divspan")
<div> <span></span> <p> <span></span> </p> </div> <span></span>
$(s1 > s2) [parent-child]
?? ?? ?? ???: s1 ???? s2? ?? ?? ??? ?????
$("div > ; "span")
<div> <span></span> <p> <span></span> </p> <span></span> </div> <span></span>
$(s1 + s2) [Brother]
?? ?? ???: s1, s1 ?? ?? ? ?? ?? ??? s2 ??? ???? ???? ?? ??? ?? ? ????. s2, ??? ??? ???? ????
$("div +span")
<div> <span></span> <p> <span></span> </p> <span></span> </div> <span></span> <span></span> <div></div> <span></span>
$(s1 ~ s2) [Brothers]
?? ??? ??? ?? ?? ???: Get s1
$("div ~span")
<div> <span></span> <p> <span></span> </p> <span></span> </div> <span></span> <span></span> <p></p> <span></span>
<!DOCTYPE html>
<html>
<head>
<title>php.cn</title>
<meta charset="utf-8" />
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js"></script>
<script >
function f1(){
//$(s1 s2)
$('div span').css('background-color','blue');
//$(s1 > s2)
$('div > span').css('background-color','green');//張飛 關(guān)羽
//$(s1 + s2) 緊緊挨著的
$('div + span').css('background-color','red');
//$(s1 ~ s2)
$('div ~ span').css('background-color','brown');
}
</script>
</head>
<body>
<h2>層次選擇器</h2>
<div>
<span>北京</span>
<p>
<span>上海</span>
</p>
<span>深圳</span>
</div>
<p>南京</p>
<span>杭州</span>
<p>廈門</p>
<span>天津</span>
<div>重慶</div>
<span>合肥</span>
<input type="button" value="觸發(fā)" onclick="f1()" />
</body>
</html>??: 4?? ??? ? ??? 3?? ?? ?????. ??? ???????
