HTML ondrop Event Attribute

Last Updated : 02 Aug, 2024

The ondrop event attribute is used to drag an element or text and drop it into a valid droppable location or target. The drag and drop is a common feature of HTML 5.

There are different events that are used and occur before ondrop event.

Events occur on the draggable target
Events occur on the drop target:

Note: By default, the images and links are draggable.

Syntax:

<div ondrop="myFunction(event)"></div>

Supported Tags:

It supports all HTML tags.

Events occur on the draggable target:

Three events are used to drag an element from the source location.

Event	Functionality
ondragstart	This event is used when the user starts to drag an element.
ondrag	The ondrag event is used to drag an element.
ondragend	This event is used to finish the dragging of an element.

Events occur on the drop of the target:

The list of events that are used to drop an element is given below.

Event	Functionality
ondragenter	This event is used to drag an element and enter into the valid drop target.
ondragover	This event is used when the dragged element is over the drop location.
ondragleave	This event occurs when the dragged element leaves the drop target.
ondrop	This event occurs when the dragged element is dropped on the drop target.

Example 1:

In this example, we will use ondrop event attribute

<!DOCTYPE HTML>
<html>

<head>
    <title>
        HTML ondrop Event Attribute
    </title>
    <style>
      
        /* CSS property to create box */
      
        #geeks {
            width: 220px;
            height: 120px;
            padding: 15px;
            border: 3px solid #4cb96b;
        }
    </style>
    <script>

        /* script to allow drop of element */
      
        function allowDrop(gg) {
            gg.preventDefault();
        }

        /* script to drag an element */
      
        function drag(gg) {
            gg.dataTransfer.setData("text", gg.target.id);
        }

        /* script to drop an element */
      
        function drop(gg) {
            gg.preventDefault();
            var data =
                gg.dataTransfer.getData("text");
            gg.target.appendChild(document.getElementById(data));
        }
    </script>
</head>

<body>
    <p>
        Drop the image into the rectangle:
    </p>
  
    <!-- ondrop event call here -->
  
    <div id="geeks" 
    ondrop="drop(event)" ondragover="allowDrop(event)">
    </div><br>
    <img id="gfg" 
    src="https://media.geeksforgeeks.org/wp-content/uploads/gg-4.png" 
    draggable="true" ondragstart="drag(event)" alt="" />
</body>

</html>

Output:

Example 2:

In this example, we will use ondrop event attribute with another example.

<!DOCTYPE html>
<html>

<head>
    <style>
        #dropZone {
            width: 200px;
            height: 100px;
            border: 2px dashed #3498db;
            padding: 20px;
            margin: 20px auto;
            font-size: 16px;
            color: #3498db;
        }

        #dropZone:hover {
            background-color: #f0f8ff;
        }

        #droppedImage {
            display: none;
            max-width: 100%;
            margin-top: 20px;
        }
    </style>
</head>

<body>
    <h1 style="color: #3498db;">Image Drop Zone</h1>
    <div id="dropZone" ondrop="handleDrop(event)" 
         ondragover="allowDrop(event)">
        Drop an image here
    </div>
    <img id="droppedImage" alt="Dropped Image">

    <script>
        function allowDrop(event) {
            event.preventDefault();
            document.getElementById("dropZone").
            innerText = "Drop it!";
        }

        function handleDrop(event) {
            event.preventDefault();
            var droppedImage = document.
            getElementById("droppedImage");
            var files = event.dataTransfer.files;

            if (files.length > 0) {
                var reader = new FileReader();
                reader.onload = function (e) {
                    droppedImage.src = e.target.result;
                    droppedImage.style.display = "block";
                    document.getElementById("dropZone").
                    innerText = "Image dropped!";
                };
                reader.readAsDataURL(files[0]);
            }
        }
    </script>
</body>

</html>