jQuery is a collection object. If you want to quickly find the sibling elements of each element in the specified element collection, you can use the siblings() method
Understand the node search relationship:
As follows The blue class="item-2" li element, the red node is its sibling sibling node
<ul class="level-3">
<li class="item-1">1</li>
<li class="item-2">2</li>
<li class="item-3" >3</li>
</ul>
siblings() no parameters
Get a set of matching elements that contains each element Element collection of sibling elements
Note: jQuery is a collection object, so siblings is the sibling element that matches each element in the collection
siblings() method selectively accepts the same Type selector expression
Similarly because jQuery is a collection object, it may be necessary to filter the collection object to find the target element, so it is allowed to pass a selector expression
Let’s write an example below:
<!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>siblings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>点击：siblingsv无参数</button>
<button>点击：siblings传递选择器</button>
<script type="text/javascript">
$("button:first").click(function() {
$('.item-2').siblings().css('border', '2px solid red');
})
</script>
<script type="text/javascript">
$("button:last").click(function() {
//找到class=item-2的所有兄弟节点
//然后筛选出最后一个，加上蓝色的边
$('.item-2').siblings(':last').css('border', '2px solid blue');
})
</script>
</body>
</html>Note: sibings finds all sibling elements, not adjacent sibling elements
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