jQuery UI Dialog classes Option

jQuery UI consists of GUI widgets, visual effects, and themes implemented using jQuery, CSS, and HTML. jQuery UI is great for building UI interfaces for the webpages. The jQuery UI Dialog classes option is used to add the classes to set some new styles on element.

Syntax:

$( ".selector" ).dialog({
  classes: {
    "ui-dialog": "highlight"
  }
});

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:

HTML

<!doctype html>
<html lang="en">
  
<head>
    <meta charset="utf-8">
    <link href=
    "https://code.jquery.com/ui/1.10.4/themes/ui-lightness/jquery-ui.css" 
    rel="stylesheet">
    <script src="https://code.jquery.com/jquery-1.10.2.js"></script>
    <script src="https://code.jquery.com/ui/1.10.4/jquery-ui.js"></script>
  
    <script>
        $(function () {
            $("#gfg").dialog({
                autoOpen: false,
                height: 100,
                classes: {
                    "ui-dialog": "highlight"
                }
            });
            $("#geeks").click(function () {
                $("#gfg").dialog("open");
            });
        });
    </script>
</head>
  
<body style="text-align: center;">
    <h1 style="color:green;">GeeksforGeeks</h1>
    <h3>jQuery UI Dialog classes Option</h3>
  
    <button id="geeks">Open Dialog</button>
  
    <div id="gfg" title="GeeksforGeeks">
        Welcome to GeeksforGeeks
    </div>
</body>
  
</html>