jQuery UI Droppable classes Option

Last Updated : 29 Jan, 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 Droppable classes option is used to add additional classes to the widget’s elements.

Syntax:

Initializing the droppable with the classes option.

$( "#divID" ).droppable({
 classes: {
   "ui-droppable": "highlight"
 }
});

Setting the value for the classes option.

$( "#divID" ).droppable( "option", 
    "classes.ui-droppable", "highlight" );

Getting the value of the classes option.

var themeClass = $( "#divID" )
    .droppable( "option", "classes.ui-droppable" );

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 demonstrates the jQuery UI Droppable classes option.

HTML

<!doctype html> 
<html lang="en"> 
  
<head> 
    <meta charset="utf-8"> 
    <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> 
        h1 { 
            color: green; 
        } 
  
        div { 
            color: white; 
            display: flex; 
            justify-content: center; 
            align-items: center; 
            text-align: center; 
        } 
  
        #div2 { 
            width: 150px; 
            height: 150px; 
            background: blue; 
        } 
  
        #div1 { 
            position: absolute; 
            left: 250px; 
            width: 200px; 
            height: 200px; 
            background: green; 
            color: #fff; 
        } 
    </style> 
</head> 
  
<body> 
    <center> 
        <h1 style="color:green;"> 
            GeeksforGeeks 
        </h1> 
        <h3>jQuery UI Droppable classes Option</h3> 
        <div id="div1">Drop here</div> 
        <div id="div2">Drag me</div> 
    </center> 
    <script> 
        $(document).ready(function () { 
            $("#div2").draggable(); 
            $("#div1").droppable({ 
                classes: { 
                    "ui-droppable": "highlight" 
                } 
            }); 
        }); 
    </script> 
</body> 
  
</html>