jQuery向父辈遍历的简单方法
通过DOM树可以可容易的访问到html文档中的所有元素
例如向上访问父辈的元素有以下方法
1.parent()方法可以得到所定元素的直接父元素
$("span").parent();得到<span>元素的直接父元素
2.parents()方法得到给定元素的所有父元素
$("span").parents();得到<span>元素的所有父元素
$("span").panents(".text");得到<span>元素的父元素中class="text"的元素
3.parentsUntil()方法得到两个给定元素之间的元素
$("span").parentsUntil(".text");得到<span>元素与class="text"元素之间的所有元素
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<script src="http://cdn.static.runoob.com/libs/jquery/1.10.2/jquery.min.js">
</script>
<style>
.container
{
float:left;
margin-left:30px;
}
.container div
{
border:1px solid grey;
margin:15px auto;
}
.ancestor1-1,.ancestor2-1,.ancestor3-1,.ancestor4-1
{
width:150px;
height:150px;
}
.ancestor1-2,.ancestor2-2,.ancestor3-2,.ancestor4-2
{
width:120px;
height:120px;
}
.ancestor1-3,.ancestor2-3,.ancestor3-3,.ancestor4-3
{
width:90px;
height:90px;
}
.now1,.now2,.now3,.now4
{
width:60px;
height:60px;
}
</style>
<script>
$(document).ready(function(){
$(".now1").parent().css("border-color","red");
$(".now2").parents().css("border-color","red");
$(".now3").parents(".ancestor3-2").css("border-color","red");
$(".now4").parentsUntil(".ancestor4-1").css("border-color","red");
}
);
</script>
</head>
<body>
<div>
<div class="container">
<div class="ancestor1-1"><div class="ancestor1-2"><div class="ancestor1-3"><div class="now1">给定元素</div></div></div></div>
</div>
<div class="container">
<div class="ancestor2-1"><div class="ancestor2-2"><div class="ancestor2-3"><div class="now2">给定元素</div></div></div></div>
</div>
<div class="container">
<div class="ancestor3-1"><div class="ancestor3-2"><div class="ancestor3-3"><div class="now3">给定元素</div></div></div></div>
</div>
<div class="container">
<div class="ancestor4-1"><div class="ancestor4-2"><div class="ancestor4-3"><div class="now4">给定元素</div></div></div></div>
</div>
</div>
</body>
</html>效果图：
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