show.bs.tab event in Bootstrap

BootstrapWeb DevelopmentCSS Framework

The show.bs.event fires when the tab is about to be displayed.

Display the tab using the nav-tabs class −

<ul class="nav nav-tabs">
  <li class="active"><a href="#home">Home</a></li>
  <li><a href="#two">Java</a></li>
  <li><a href="#three">CSS</a></li>
  <li><a href="#four">Bootstrap</a></li>
  <li><a href="#five">jQuery</a></li>
</ul>

After that, you need to use the show.bs.tab class to generate an alert after the tab is clicked, but just before it is displayed −

$('.nav-tabs a').on('show.bs.tab', function(){
  alert('New tab will be visible now!');
});

You can try to run the following code to implement the show.bs.tab event −

Example

Live Demo

<!DOCTYPE html>
<html lang="en">
  <head>
    <title>Bootstrap Example</title>
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1">
    <link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
    <script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
  </head>

  <body>
  <div class="container">
    <h2>Learn</h2>
    <ul class="nav nav-tabs">
      <li class="active"><a href="#home">Home</a></li>
      <li><a href="#two">Java</a></li>
      <li><a href="#three">CSS</a></li>
      <li><a href="#four">Bootstrap</a></li>
      <li><a href="#five">jQuery</a></li>
    </ul>

    <div class="tab-content">
     <div id="home" class="tab-pane fade in active">
      <h3>Home</h3>
      <p>This is demo text!</p>
     </div>
     <div id="two" class="tab-pane fade">
      <h3>PHP</h3>
      <p>This is demo text!</p>
     </div>
     <div id="three" class="tab-pane fade">
      <h3>C#.NET</h3>
      <p>This is demo text!</p>
     </div>
     <div id="four" class="tab-pane fade">
      <h3>Ruby</h3>
      <p>This is demo text!</p>
     </div>
     <div id="five" class="tab-pane fade">
      <h3>HTML5</h3>
      <p>This is demo text!</p>
     </div>
   </div>
  </div>

<script>
$(document).ready(function(){
  $(".nav-tabs a").click(function(){
    $(this).tab('show');
  });
  $('.nav-tabs a').on('show.bs.tab', function(){
    alert('New tab will be visible now!');
   });
  $('.nav-tabs a').on('shown.bs.tab', function(){
    alert('New tab is now visible!');
  });
  $('.nav-tabs a').on('hide.bs.tab', function(e){
   alert('Previous tab will hide now!');
  });
  $('.nav-tabs a').on('hidden.bs.tab', function(){
    alert('Previous Tab is hidden now!');
  });
});

</script>

</body>
</html>
raja
Updated on 16-Jun-2020 08:23:27

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