jQuery numbered child selector
Description and Syntax
$(':nth-child(n/even/odd/expr)')
selects all elements that are the nth child of their parent.
Examples
| Selector | Selects |
|---|---|
| $('li:nth-child(2)') | all <li> elements that are the second child of their parent |
| $('p:nth-child(odd)') | all <p> elements that are an odd-numbered child of their parent (first, third, fifth, and so on) |
| $('.myclass:nth-child(3n+2)') | all elements with the class myclass that are the (3n+2)th child of their parent (second, fifth, eighth, and so on) |
Given the following HTML code:
<div>//w ww .j a va2 s . c om
<h2></h2>
<p></p>
<h2></h2>
<p></p>
<p></p>
</div>
$('p:nth(1)')selects the second<p>because numbering for:nth(n)starts with 0$('p:nth-child(1)')selects nothing because there is no<p>element that is the first child of its parent$('p:nth(2)')selects the third<p>$('p:nth-child(2)')selects the first<p>because it is the second child of its parent
:nth-child(n) can take even or odd.
For
<div>//from w ww .j a v a 2 s.co m
<h2></h2>
<p></p>
<h2></h2>
<p></p>
<p></p>
</div>
$('p:nth-child(even)') selects the first and
third <p> because they are children 2
and 4 (both even numbers) of their parent.
<html>
<head>
<script src="http://java2s.com/style/jquery-1.8.0.min.js"></script>
<script type="text/javascript">
$(document).ready(function(){<!--from w w w. j a v a2 s. c o m-->
$("ul li:nth-child(2)").append("<span> - 2nd!</span>");
});
</script>
</head>
<body>
<body>
<div>
<ul>
<li>A</li>
<li>B</li>
<li>C</li>
</ul>
</div>
<div>
<ul>
<li>D</li>
<li>E</li>
<li>F</li>
<li>G</li>
</ul>
</div>
<div>
<ul>
<li>H</li>
<li>I</li>
<li>J</li>
<li>K</li>
</ul>
</div>
</body>
</html>