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
1 <!DOCTYPE html>
2 <html>
3 <head>
4 <meta charset="UTF-8">
5 <script src="http://cdn.static.runoob.com/libs/jquery/1.10.2/jquery.min.js">
6 </script>
7 <style>
8 .container
9 {
10 float:left;
11 margin-left:30px;
12 }
13 .container div
14 {
15 border:1px solid grey;
16 margin:15px auto;
17 }
18 .ancestor1-1,.ancestor2-1,.ancestor3-1,.ancestor4-1
19 {
20 150px;
21 height:150px;
22 }
23 .ancestor1-2,.ancestor2-2,.ancestor3-2,.ancestor4-2
24 {
25 120px;
26 height:120px;
27 }
28 .ancestor1-3,.ancestor2-3,.ancestor3-3,.ancestor4-3
29 {
30 90px;
31 height:90px;
32 }
33 .now1,.now2,.now3,.now4
34 {
35 60px;
36 height:60px;
37 }
38 </style>
39 <script>
40 $(document).ready(function(){
41 $(".now1").parent().css("border-color","red");
42 $(".now2").parents().css("border-color","red");
43 $(".now3").parents(".ancestor3-2").css("border-color","red");
44 $(".now4").parentsUntil(".ancestor4-1").css("border-color","red");
45 }
46 );
47 </script>
48 </head>
49 <body>
50 <div>
51 <div class="container">
52 <div class="ancestor1-1"><div class="ancestor1-2"><div class="ancestor1-3"><div class="now1">给定元素</div></div></div></div>
53 </div>
54 <div class="container">
55 <div class="ancestor2-1"><div class="ancestor2-2"><div class="ancestor2-3"><div class="now2">给定元素</div></div></div></div>
56 </div>
57 <div class="container">
58 <div class="ancestor3-1"><div class="ancestor3-2"><div class="ancestor3-3"><div class="now3">给定元素</div></div></div></div>
59 </div>
60 <div class="container">
61 <div class="ancestor4-1"><div class="ancestor4-2"><div class="ancestor4-3"><div class="now4">给定元素</div></div></div></div>
62 </div>
63 </div>
64 </body>
65 </html>
效果图：
分类: JavaScript