jQuery ???
jQuery Traversal - Filter
?? ?? ??? ??
?? ???? ? ?? ??? ??? first(), last() ? eq()???. ?? ??? ???? ?? ?? ?? ?????.
filter() ? not()? ?? ?? ??? ??? ???? ??? ??? ????? ???? ?? ??? ??? ? ????.
jQuery first() ???
first() ???? ??? ?? ? ? ?? ??? ?????.
?? ???? ? ?? <div> ?? ?? ? ?? <p> ??? ?????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("div p").first().css("background-color","yellow");
});
</script>
</head>
<body>
<h1>歡迎訪問我的主頁</h1>
<div>
<p>這是 div 中的一個(gè)段落。</p>
</div>
<div>
<p>這是另外一個(gè) div 中的一個(gè)段落。</p>
</div>
<p>這是一個(gè)段落。</p>
</body>
</html>????? ???? ??? ???.
jQuery last() ???
last() ???? ?????. ??? ??? ??? ?????.
?? ???? ??? <div> ???? ??? <p> ??? ?????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("div p").last().css("background-color","yellow");
});
</script>
</head>
<body>
<h1>歡迎訪問我的主頁</h1>
<div>
<p>這是 div 中的一個(gè)段落。</p>
</div>
<div>
<p>這是另外一個(gè) div 中的一個(gè)段落。</p>
</div>
<p>這是一個(gè)段落。</p>
</body>
</html>????? ???? ??? ???.
jQuery eq() ???
eq() ???? ?????. ??? ??? ??? ?? ??? ?????.
??? ??? 0?? ????? ? ?? ??? ??? ??? 1? ?? 0???. ?? ???? ? ?? <p> ??(?? 1)? ?????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("p").eq(1).css("background-color","yellow");
});
</script>
</head>
<body>
<h1>歡迎訪問我的主頁</h1>
<p>php中文網(wǎng) (index 0).</p>
<p>http://ipnx.cn (index 1)。</p>
<p>google (index 2).</p>
<p>http://www.google.com (index 3)。</p>
</body>
</html>????? ???? ??? ???
jQuery filter() ???
filter() ???? ???? ??? ??? ? ????. . ? ??? ???? ?? ??? ????? ???? ???? ??? ?????.
?? ???? ??? ??? "url"? ?? <p> ??? ?????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("p").filter(".url").css("background-color","yellow");
});
</script>
</head>
<body>
<h1>歡迎訪問我的主頁</h1>
<p>php中文網(wǎng) (index 0).</p>
<p class="url">http://ipnx.cn (index 1)。</p>
<p>google (index 2).</p>
<p class="url">http://www.google.com (index 3)。</p>
</body>
</html>????? ???? ??? ???
jQuery not() ???
not() ???? ??? ???? ?? ?? ??? ???????.
?: not() ???? filter()? ?????.
?? ???? ??? ?? "url"? ?? ?? <p> ??? ?????.
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.min.js">
</script>
<script>
$(document).ready(function(){
$("p").not(".url").css("background-color","yellow");
});
</script>
</head>
<body>
<h1>歡迎訪問我的主頁</h1>
<p>php中文網(wǎng) (index 0).</p>
<p class="url">http://ipnx.cn (index 1)。</p>
<p>google (index 2).</p>
<p class="url">http://www.google.com (index 3)。</p>
</body>
</html>????? ???? ??? ???
