Find and Show jQuery Version

You can use $().jquery , jQuery.fn.jquery and $()['jquery'] to find the jQuery version.

example

 
$(document).ready(function()
{
  alert(jQuery.fn.jquery);
});

If you want to know jQuery UI library version, you can use $.ui.version

example

 
$(document).ready(function()
{
  alert($.ui.version);
});

example

 
if (typeof jQuery != 'undefined') {
  alert(jQuery.fn.jquery);
  alert($().jquery);
  alert($()['jquery']);
  alert($.ui.version);
}

Try it Yourself

Full Source

 
<html>
<head>
<title>jQuery Version</title>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.3.1/jquery.min.js"></script>
<script src="https://code.jquery.com/ui/1.12.1/jquery-ui.js"></script>
<script>
  $(document).ready(function(){
      $("button").click(function(){
        if (typeof jQuery != 'undefined') {
          alert(jQuery.fn.jquery);
          alert($().jquery);
          alert($()['jquery']);
          alert($.ui.version);
        }
      });
  });
</script>
</head>
<body>
  <button>Check jQuery version</button>
</body>
</html>

jQuery Version History

Version 1.0 was the first stable release of jQuery. Versions 2.0 dropped support for Internet Explorer 6-8 to increase jQuery's overall performance and reduce the library's file size. With the release of version 3.0 both versions 1.11.1 and 2.1.1 will be upgraded to jQuery Compat 3.0 and jQuery 3.0. With the release of Version 3.0 there's no reason to stick to either version 1.0 or 2.0. You can check the full details of... jQuery release history , and also you can check jQuery Core... All Versions .

Next : How to multiple version of jQuery?