:nth-last-of-type()1.9+

概述 nth-last-of-type selector

返回值：jQuery

描述：选择所有他们父级兄弟元素下具有相同的元素名（手册网注：标签名，比如<li>）的倒数第n个子元素，计数从最后一个元素开始到第一个。

V : 1.9jQuery( ":nth-last-of-type(index/even/odd/equation)" )

index: 每个相匹配子元素的索引值，从最后一个开始(1)，也可以是字符串 even 或 odd，或一个方程式( 例如 :nth-last-of-type(even), :nth-last-of-type(4n))

因为jQuery的实现:nth-是严格来自CSS规范，n值是“1-indexed”，也就是说，从1开始计数。对于所有其他选择器表达式比如:eq() 或 :even ，jQuery遵循JavaScript的“0索引”的计数。因此，给定一个单一<ul>包含3个<li>， $('li:nth-last-of-type(1)')选择第3个，也就是最后一个<li>。

这个不寻常的用法，可进一步讨论中找到W3C CSS specification.

示例

在每个匹配的ul中查找倒数第二个li

<ul>
	<li>1</li>
	<li>2</li>
	<li>3</li>
	<li>4</li>
</ul>
 
$("ul li:nth-last-of-type(2)");

实例

在每个匹配的ul中查找倒数第二个li，并将它标记出来。

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>nth-last-of-type demo</title>
  <style>
  div {
    float: left;
  }
  span {
    color: blue;
  }
  </style>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<div>
  <ul>
    <li>John</li>
    <li>Karl</li>
    <li>Adam</li>
  </ul>
</div>
<div>
  <ul>
    <li>Dan</li>
  </ul>
</div>
<div>
  <ul>
    <li>Dave</li>
    <li>Rick</li>
    <li>Timmy</li>
    <li>Gibson</li>
  </ul>
</div>
 
<script>
$( "ul li:nth-last-of-type(2)" ).append( "<span> - 2nd to last!</span>" );
</script>
 
</body>
</html>

运行一下

实例

This is a playground to see how the selector works with different strings.

<!doctype html>
<html lang="en">
<head>
  <meta charset="utf-8">
  <title>nth-last-of-type demo</title>
  <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>
  <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
</head>
<body>
 
<div>
  <button>:nth-last-of-type(even)</button>
  <button>:nth-last-of-type(odd)</button>
  <button>:nth-last-of-type(3n)</button>
  <button>:nth-last-of-type(2)</button>
</div>
<div>
  <button>:nth-last-of-type(3n+1)</button>
  <button>:nth-last-of-type(3n+2)</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>
 
<script>
$( "button" ).click(function() {
  var str = $( this ).text();
  $( "tr" ).css( "background", "white" );
  $( "tr" + str ).css( "background", "#ff0000" );
  $( "#inner" ).text( str );
});
</script>
 
</body>
</html>

运行一下

:nth-last-of-type()1.9+

概述 nth-last-of-type selector

V : 1.9jQuery( ":nth-last-of-type(index/even/odd/equation)" )

示例

实例

实例