jQuery ?? prev() ???
jQuery? ??? ?????. ??? ?? ??? ?? ? ??? ?? ?? ??? ?? ??? ??? ???? prev() ???
? ???? ?? ?? ??? ??? ? ????. ?? ??? ???= "item-2"? li ??? ?? ??? ??? ?? ?? ?????
<ul class="level-3">
? <li class="item-1"> ;1</li>
<li class="item-2">2</li> <li class="item-3">3</li>
</ul>
prev() ?? ????
???? ?? ??? ?? ? ??? ?? ?? ?? ?? ??? ???? ?? ??? ?????.
??: jQuery? ??? ????? prev? ???? ?? ??? ? ??? ?? ?? ?????. collection
prev() ???? ??? ??? ??? ???? ????? ?????
????? jQuery? ??? ???? ??? ?? ??? ?? ?? ? ??? ??? ????? ? ?? ???? ??? ???
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-type" content="text/html; charset=utf-8" />
<title></title>
<style>
.left {
width: auto;
height: 150px;
}
.left div {
width: 150px;
height: 100px;
padding: 5px;
margin: 5px;
float: left;
background: #bbffaa;
border: 1px solid #ccc;
}
a {
display: block;
}
</style>
<script src="http://libs.baidu.com/jquery/1.9.1/jquery.js"></script>
</head>
<body>
<h2>prev方法()</h2>
<div class="left first-div">
<div class="div">
<ul class="level-1">
<li class="item-1">1</li>
<li class="item-2">2</li>
<li class="item-3">3</li>
</ul>
</div>
<div class="div">
<ul class="level-2">
<li class="item-1">1</li>
<li class="item-2">2</li>
<li class="item-3">3</li>
</ul>
</div>
<div class="div">
<ul class="level-3">
<li class="item-1">1</li>
<li class="item-2">2</li>
<li class="item-3">3</li>
</ul>
</div>
</div>
<button>點(diǎn)擊：prev無(wú)參數(shù)</button>
<button>點(diǎn)擊：prev傳遞選擇器</button>
<script type="text/javascript">
$("button:first").click(function() {
$('.item-2').prev().css('border', '1px solid red');
})
</script>
<script type="text/javascript">
$("button:last").click(function() {
//找到所有class=item-2的li
//然后篩選出最后一個(gè)，加上藍(lán)色的邊
$('.item-3').prev(':last').css('border', '1px solid blue');
})
</script>
</body>
</html>prev() ??? ???? ???? ?? eq(1), first, last, :contains("3"), has(' p'? ?? ?? ?? ??? ??? ????? ????. ), ???? ??? ???? ?????. ?? next()? ????? ??? ????
