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jQuery UI Dialog dialogClass Option

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  • Last Updated : 22 Mar, 2021
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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 Dialog dialogClass option is used to add the additional class names that will use for additional theming.


$( ".selector" ).dialog({
  dialogClass: "alert"

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

<link rel=”stylesheet” href=””>
<script src=””></script>
<script src=””></script>



<!doctype html>
<html lang="en">
    <meta charset="utf-8">
    <link href=
    <script src=""></script>
    <script src=""></script>
        .GFG {
            font-size: 25px;
            font-weight: bold;
        $(function () {
                autoOpen: false,
                dialogClass: "GFG"
            $("#geeks").click(function () {
<body style="text-align: center;">
    <h1 style="color:green;">GeeksforGeeks</h1>
    <h3>jQuery UI Dialog dialogClass Option</h3>
    <button id="geeks">Open Dialog</button>
    <div id="gfg" title="GeeksforGeeks">
        Welcome to GeeksforGeeks


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