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:nth-child(index/even/odd/equation)
Matches the nth-child of its parent or all its even or odd children.
While
:eq(index) matches only a single element, this matches more then one: One for each parent with index. Multiple for each parent with even, odd, or equation.
The specified index is one-indexed, in contrast to :eq() which starts at zero.
Arguments:| index | Number/String | |
|---|
| The index of each child to match, starting with 1 or the string even, odd, or equation ( eg. :nth-child(even), :nth-child(4n) ) |
Examples:| Name | Type |
|---|
Finds the second li in each matched ul and notes it.
$("ul li:nth-child(2)").append("<span> - 2nd!</span>");
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script src="../jquery-latest.js"></script>
<script>
$(document).ready(function(){
$("ul li:nth-child(2)").append("<span> - 2nd!</span>");
});
</script>
<style>
div { float:left; }
span { color:blue; }
</style>
</head>
<body>
<div><ul>
<li>John</li>
<li>Karl</li>
<li>Brandon</li>
</ul></div>
<div><ul>
<li>Sam</li>
</ul></div>
<div><ul>
<li>Glen</li>
<li>Tane</li>
<li>Ralph</li>
<li>David</li>
</ul></div>
</body>
</html>
This is a playground to see how the selector works with different strings. Notice that this is different from the :
even and :
odd which have no regard for parent and just filter the list of elements to every other one. The :nth-child, however, counts the index of the child to its particular parent. In any case, it's easier to see than explain so...
$("button").click(function () {
var str = $(this).text();
$("tr").css("background", "white");
$("tr" + str).css("background", "#e2e1fb");
$("#inner").text(str);
});
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"
"http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<script src="../jquery-latest.js"></script>
<script>
$(document).ready(function(){
$("button").click(function () {
var str = $(this).text();
$("tr").css("background", "white");
$("tr" + str).css("background", "#e2e1fb");
$("#inner").text(str);
});
});
</script>
<style>
button { display:block; font-size:12px; width:100px; }
div { float:left; margin:10px; font-size:10px;
border:1px solid black; }
span { color:blue; font-size:18px; }
#inner { color:red; }
td { width:50px; text-align:center; }
</style>
</head>
<body>
<div>
<button>:nth-child(even)</button>
<button>:nth-child(odd)</button>
<button>:nth-child(3n)</button>
<button>:nth-child(2)</button>
</div>
<div>
<button>:nth-child(3n+1)</button>
<button>:nth-child(3n+2)</button>
<button>:even</button>
<button>:odd</button>
</div>
<div><table>
<tr><td>John</td></tr>
<tr><td>Karl</td></tr>
<tr><td>Brandon</td></tr>
<tr><td>Benjamin</td></tr>
</table></div>
<div><table>
<tr><td>Sam</td></tr>
</table></div>
<div><table>
<tr><td>Glen</td></tr>
<tr><td>Tane</td></tr>
<tr><td>Ralph</td></tr>
<tr><td>David</td></tr>
<tr><td>Mike</td></tr>
<tr><td>Dan</td></tr>
</table></div>
<span>
tr<span id="inner"></span>
</span>
</body>
</html>