我正在尝试做一些非常基本的事情,但由于某种原因它没有用。
这是我的HTML:
<div class="col-xs-6 bbb b-left roll" style="transform: translate(0px, 0px);">
<section class="overlay first" style="background:url('/css/rollsright-0-0.jpg');
background-size:cover;background-repeat: no-repeat;background-position:bottom;">
</section>
</div>
<div class="col-xs-6 bbb b-right roll" style="transform: translate(0px, 0px); opacity: 1;">
<section class="overlay first" style="background:url('/css/rollsright-1-0.jpg');
background-size:cover;background-repeat: no-repeat;background-position:bottom;">
</section>
</div>
<div class="col-xs-6 bbb b-left roll" style="transform: translate(0px, 0px);">
<section class="overlay first" style="background:url('/css/rollsright-0-1.jpg');
background-size:cover;background-repeat: no-repeat;background-position:top;">
</section>
</div>
<div class="col-xs-6 bbb b-right roll" style="transform: translate(0px, 0px);">
<section class="overlay first" style="background:url('/css/rollsright-1-1.jpg');
background-size:cover;background-repeat: no-repeat;background-position:top;">
</section>
</div>
当我使用$(".roll")
选择$(".roll").eq(0)
的第一个实例时(总共有4个,或者从零索引开始的3个)我想知道使用jquery后面有多少个滚动兄弟。我应该得到3,但我得到1。
为什么会这样?
$(".roll").eq(0).next(".roll").length
输出:
1
答案 0 :(得分:1)
.next()
会立即获得兄弟姐妹,您必须使用.nextAll(".roll")
来获取课程roll
的所有sibligs:
$(".roll").eq(0).nextAll(".roll").length
希望这有帮助。
console.log( $(".roll").eq(0).nextAll(".roll").length );
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.1.1/jquery.min.js"></script>
<div class="col-xs-6 bbb b-left roll" style="transform: translate(0px, 0px);">
<section class="overlay first" style="background:url('/css/rollsright-0-0.jpg');background-size:cover;background-repeat: no-repeat;background-position:bottom;">
</section>
</div>
<div class="col-xs-6 bbb b-right roll" style="transform: translate(0px, 0px); opacity: 1;">
<section class="overlay first" style="background:url('/css/rollsright-1-0.jpg');background-size:cover;background-repeat: no-repeat;background-position:bottom;">
</section>
</div>
<div class="col-xs-6 bbb b-left roll" style="transform: translate(0px, 0px);">
<section class="overlay first" style="background:url('/css/rollsright-0-1.jpg');background-size:cover;background-repeat: no-repeat;background-position:top;">
</section>
</div>
<div class="col-xs-6 bbb b-right roll" style="transform: translate(0px, 0px);">
<section class="overlay first" style="background:url('/css/rollsright-1-1.jpg');background-size:cover;background-repeat: no-repeat;background-position:top;">
</section>
</div>