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jQuery - Selectors - lastChild选择最后一个子元素

翟承志
2023-12-01
               

jQuery - Selectors - lastChild选择最后一个子元素

Selectors/lastChild

From jQuery JavaScript Library

:last-child

Matches all elements that are the last child of their parent.
While :last matches only a single element, this matches more then one: One for each parent.
  • Demo

Finds the last span in each matched div and adds some css plus a hover state.

    $("div span:last-child")
        .css({color:"red", fontSize:"80%"})
        .hover(function () {
              $(this).addClass("solast");
            }, function () {
              $(this).removeClass("solast");
            });
  • View Source

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" 
                    "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
  <script src="http://code.jquery.com/jquery-latest.js"></script>

  <script>
  $(document).ready(function(){

    $("div span:last-child")
        .css({color:"red", fontSize:"80%"})
        .hover(function () {
              $(this).addClass("solast");
            }, function () {
              $(this).removeClass("solast");
            });

  });
  </script>
  <style>
  span.solast { text-decoration:line-through; }
  </style>
</head>
<body>
  <div>
    <span>John,</span>
    <span>Karl,</span>
    <span>Brandon,</span>
    <span>Sam</span>
  </div>
  <div>
    <span>Glen,</span>
    <span>Tane,</span>
    <span>Ralph,</span>
    <span>David</span>
  </div>
</body>
</html>

[jQuery - Selectors - lastChild选择最后一个子元素 - 文档]

http://docs.jquery.com/Selectors/lastChild 

[jQuery - 官方网站]

http://jquery.com/

[jQuery - download下载]

当前版本, http://docs.jquery.com/Release:jQuery_1.3.1
下载列表, http://docs.jquery.com/Downloading_jQuery
最新代码, http://code.jquery.com/nightlies/jquery-nightly.js

[jQuery - 相关论坛]

http://groups.google.com/group/jquery-en
http://WebDev.board.newsmth.net/
http://WebGeeks.board.newsmth.net/
http://bbs.pku.edu.cn/, homepage看版
http://forum.csdn.net/SList/JavaScript/

[jQuery - 关键词]

jQuery

[jQuery - 文档]

http://docs.jquery.com/Main_Page

[jQuery - Core核心]

each迭代, http://docs.jquery.com/Core/each
jQuery, http://docs.jquery.com/Core/jQuery

[jQuery - Ajax]

jQuery的Ajax文档, http://docs.jquery.com/Ajax/jQuery.ajax
jQuery的Ajax选项,http://docs.jquery.com/Ajax/jQuery.ajax#options
dataType选项,设置返回值类型
timeout选项,用于设置超时
与PHP集成可以使用json_encode返回结果, http://www.php.net/manual/zh/function.json-encode.php

readyState获取请求操作的当前状态, http://msdn2.microsoft.com/en-us/library/ms534361.aspx

[jQuery - 特效]

jQuery淡入特效,http://docs.jquery.com/Effects/fadeIn

[jQuery - Selectors选择器]

表单元素选择器, http://docs.jquery.com/DOM/Traversing/Selectors#Form_Selectors
属性相等选择器,http://docs.jquery.com/Selectors/attributeEquals
checked选中, http://docs.jquery.com/Selectors/checked

:input匹配所有input, textarea, select和button元素, http://docs.jquery.com/Selectors/input

选择器在选择body中出现的title标记时,会出现和预期不同的效果。

element按指定名称匹配所有元素, http://docs.jquery.com/Selectors/element

lastChild选择最后一个子元素, http://docs.jquery.com/Selectors/lastChild

 

[jQuery - Attributes属性]

val获取第一个匹配元素value属性的内容, http://docs.jquery.com/Attributes/val

[jQuery - 常用函数]

attr访问自定义属性,减少javascript脚本中代码和数据的耦合
filter, 用于在集合中过滤元素

[jQuery - Events事件]

hover, http://docs.jquery.com/Events/hover
submit提交, http://docs.jquery.com/Events/submit

focus响应每个匹配元素的焦点事件, http://docs.jquery.com/Events/focus

click单击, 触发每个匹配元素的单击事件, 绑定函数到每个匹配元素的单击事件, http://docs.jquery.com/Events/click

[jQuery - Manipulation操作]

after在每个匹配的元素之后插入内容, http://docs.jquery.com/Manipulation/after

[jQuery - Traversing遍历器]

filter过滤, http://docs.jquery.com/Traversing/filter
find查找, http://docs.jquery.com/Traversing/find

[jQuery - Tutorials教程]

Introducing $(document).ready(), http://docs.jquery.com/Tutorials:Introducing_%24%28document%29.ready%28%29

[jQuery - plugins插件]

Easing动画, http://jquery.com/plugins/project/easing
jCarouseLite, 走马灯效果, http://jquery.com/plugins/project/jCarouselLite
tableFilter, 表过滤器, http://jquery.com/plugins/project/tableFilter
Rounded Corner圆角矩形, http://docs.jquery.com/Tutorials:Rounded_Corners#Rounded_Corners_Without_Images

Jeditable原位置编辑器插件, http://plugins.jquery.com/project/jeditable

Cookie, http://plugins.jquery.com/project/Cookie

[jQuery - Utilities实用工具]

trim去掉字符串前后的空格, http://docs.jquery.com/Utilities/jQuery.trim

[jQuery - UI]

UI, http://docs.jquery.com/UI
UI/Theming, http://docs.jquery.com/UI/Theming

[jQuery - 参考资料]

http://www.json.org/, http://www.json.org/json.js

JScript (Windows Script Technologies):, http://msdn2.microsoft.com/en-us/library/hbxc2t98.aspx

prototype Property (JScript 5.6):, http://msdn2.microsoft.com/en-us/library/f5s9ycex.aspx

parseInt Method (JScript 5.6):, http://msdn2.microsoft.com/en-us/library/x53yedee.aspx

toString Method (JScript 5.6):, http://msdn2.microsoft.com/en-us/library/k6xhc6yc.aspx

HTTP Status Codes (Windows):, http://msdn2.microsoft.com/en-us/library/Aa384325.aspx

HTML+TIME:, http://msdn2.microsoft.com/en-us/library/ms533112.aspx

HTA:APPLICATION对象, http://msdn2.microsoft.com/en-us/library/ms536495.aspx

About Cross-Frame Scripting and Security:关于跨框架脚本和安全, http://msdn2.microsoft.com/en-us/library/ms533028.aspx

How to Build Tables Dynamically:如何动态构建表格, http://msdn2.microsoft.com/en-us/library/ms532998.aspx

Filter Property (Tabular Data Control): - Filter属性(表格数据控件), http://msdn2.microsoft.com/en-us/library/ms531364.aspx

close Method (window):, http://msdn2.microsoft.com/en-us/library/ms536367.aspx

ECMA标准下载, http://www.ecma-international.org/publications/standards/Ecma-262.htm

parseInt Method (JScript 5.6): - IE标准, http://msdn2.microsoft.com/en-us/library/x53yedee.aspx

complete Property (IMG, INPUT, INPUT type=image):, http://msdn2.microsoft.com/en-us/library/ms533688.aspx

fireEvent Method (A, ABBR, ACRONYM, ...):, http://msdn2.microsoft.com/en-us/library/ms536423.aspx

SunSpider JavaScript Benchmark: JavaScript性能测试, http://webkit.org/perf/sunspider-0.9/sunspider.html

onbeforeunload Event (BODY, FRAMESET, window):, http://msdn2.microsoft.com/en-us/library/ms536907.aspx

 

 

 

[jQuery - 综合实例]

实现前一个和后一个效果

跨窗口调用函数

定时刷新

下拉列表框打开指定网站

生成在两个边界间的随机数
文本输入框与标签自动更换

密码输入框与标签自动更换

文本输入区域与标签自动更换

Pre标签在IE与Firefox下效果相对理想的换行处理

固定表头,滚动表格内容
           

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