jQuery UI Tabs激活事件

jQuery UI由GUI部件、视觉效果和使用HTML、CSS和jQuery实现的主题组成。jQuery UI非常适用于为网页构建UI界面。jQuery UI Tabs widget用于创建一个具有多个面板的单一内容区域，这些面板与列表中的标题相关联。

jQuery UI标签激活事件是用来触发一个标签被激活的时候。如果之前激活的标签将崩溃，那么ui.oldTab和ui.oldPanel将是空对象，如果标签正在崩溃，ui.newTab和ui.newPanel将是空jQuery对象。

Tabs激活事件接受2个值，列在下面。

event。它代表标签小组件的事件。
ui。它是一个对象类型，并包含以下值。
- newTab。它代表即将被激活的标签。
- oldTab。它代表即将被停用的标签。
- newPanel。它代表即将被激活的面板。
- oldPanel。它代表即将被停用的面板。

语法:

用激活回调初始化标签。

$( ".selector" ).tabs({
      activate: function( event, ui ) {}
});

将一个事件监听器绑定到tabsactivate事件。

$( ".selector" ).on( 
    "tabsactivate", 
    function( event, ui ) {} 
);

CDN链接：首先，添加你的项目需要的jQuery UI脚本。

<link rel=”stylesheet” href=”//code.jquery.com/ui/1.12.1/themes/smoothness/jquery-ui.css”>
<script src=”//code.jquery.com/jquery-1.12.4.js”></script>
<script src=”//code.jquery.com/ui/1.12.1/jquery-ui.js”></script>

例子：这个例子描述了jQuery UI Tabs激活事件的用途。

<!DOCTYPE html>
<html lang="en">
  
<head>
    <meta charset="utf-8">
    <title>
        jQuery UI Tabs activate Event
    </title>
    <link rel="stylesheet" 
          href=
"//code.jquery.com/ui/1.12.1/themes/smoothness/jquery-ui.css">
    <script src="//code.jquery.com/jquery-1.12.4.js">
    </script>
    <script src="//code.jquery.com/ui/1.12.1/jquery-ui.js">
    </script>
    <style>
        #gfg {
            width: 600px;
            text-align: justify;
        }
    </style>
</head>
  
<body>
    <h1 style="color: green;">
        GeeksforGeeks
    </h1>
  
    <h3>jQuery UI Tabs activate Event</h3>
  
    <div id="gfg">
        <ul>
            <li><a href="#gfg1">HTML</a></li>
            <li><a href="#gfg2">CSS</a></li>
            <li><a href="#gfg3">JavaScript</a></li>
            <li><a href="#gfg4">Bootstrap</a></li>
        </ul>
  
        <div id="gfg1">
            HTML stands for HyperText Markup Language. 
            It is used to design web pages using the 
            markup language. HTML is the combination 
            of Hypertext and Markup language. Hypertext 
            defines the link between the web pages and
            markup language defines the text document 
            within the tag that define the structure 
            of web pages.
        </div>
  
        <div id="gfg2">
            CSS (Cascading Style Sheets) is a stylesheet 
            language used to design a webpage to make it 
            attractive. The reason for using this is to 
            simplify the process of making web pages 
            presentable. It allows you to apply styles 
            on web pages. More importantly, it enables 
            you to do this independent of the HTML that 
            makes up each web page.
        </div>
  
        <div id="gfg3">
            JavaScript is the world most popular 
            lightweight, interpreted compiled programming 
            language. It is also known as scripting 
            language for web pages. It is well-known for 
            the development of web pages, many non-browser 
            environments also use it. JavaScript can be 
            used for Client-side developments as well as 
            Server-side developments.
        </div>
  
        <div id="gfg4">
            Bootstrap is a free and open-source tool 
            collection for creating responsive websites 
            and web applications. It is the most popular 
            HTML, CSS, and JavaScript framework for 
            developing responsive, mobile-first websites. 
            Nowadays, the websites are perfect for all 
            the browsers (IE, Firefox, and Chrome) and 
            for all sizes of screens (Desktop, Tablets, 
            Phablets, and Phones).
        </div>
    </div>
  
    <script>
         $(document).ready(function () {$ ("#gfg").tabs();
  
            $("#gfg").on('tabsactivate', function () {
                alert("Tabs Activate Event Triggered!");
            });
        });
    </script>
</body>
  
</html>

输出:

jQuery UI Tabs激活事件