jQuery UI Tabs activate Event

Last Updated : 01 Jun, 2022

jQuery UI consists of GUI widgets, visual effects, and themes implemented using HTML, CSS, and jQuery. jQuery UI is great for building UI interfaces for the webpages. The jQuery UI Tabs widget is used to create a single content area with multiple panels that are associated with a header in a list.

The jQuery UI Tabs activate event is used to trigger when a tab is activated. If the previously active tab will collapse, then ui.oldTab and ui.oldPanel will be empty objects and if the tabs are collapsing, ui.newTab and ui.newPanel will be empty jQuery objects.

The Tabs activate event accepts 2 values that are listed below:

event: It represents the event for the tabs widget.
ui: It is of an object type, and contains the following values:
- newTab: It represents the tab that is about to be activated.
- oldTab: It represents the tab that is about to be deactivated.
- newPanel: It represents the panel that is about to be activated.
- oldPanel: It represents the panel that is about to be deactivated.

Syntax:

Initialize the tabs with the activate callback:

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

Bind an event listener to the tabsactivate event:

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

CDN Link: First, add jQuery UI scripts needed for your project.

<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>

Example: This example describes the uses of the jQuery UI Tabs activate event.

HTML

<!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>