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CSSStyleDeclaration JS Conversion


ondrag Event

Example

Execute a JavaScript when a <p> element is being dragged:

<p draggable="true" ondrag="myFunction(event)">Drag me!</p>
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More examples below.


Definition and Usage

The ondrag event occurs when an element or text selection is being dragged.

Drag and drop is a common feature in HTML. It is when you "grab" an object and drag it to a different location.

To make an element draggable, use The draggable Attribute.

For more information, see the HTML Drag and Drop Tutorial.

Links and images are draggable by default, and do not need the draggable attribute.

Many events occur in the different stages of a drag and drop operation (see below):

Drag Events

On the Draggable Element:

EventDescriptionBubbles
ondrag When an element is being draggedYes
ondragstart When the user starts to drag an elementYes
ondragend When the user has finished dragging an elementYes

Note: While dragging an element, the ondrag event fires every 350 milliseconds.

On the Drop Target:

EventDescriptionBubbles
ondragenter When the dragged element enters the drop targetYes
ondragleave When the dragged element leaves the drop targetYes
ondragover When the dragged element is over the drop targetYes
ondrop When the dragged element is dropped on the targetYes

See Also:

The Drag Event Object
The draggable Attribute

Tutorial:

HTML Drag and Drop


Syntax

In HTML:

<element ondrag="myScript">
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In JavaScript:

object.ondrag = function(){myScript};
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In JavaScript, using the addEventListener() method:

object.addEventListener("drag", myScript);
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Technical Details

Bubbles: Yes
Cancelable: Yes
Event type: DragEvent
Supported HTML tags: All HTML elements
DOM Version: Level 3 Events


More Examples

Example

A demonstration of ALL possible drag and drop events:

<p draggable="true" id="dragtarget">Drag me!</p>

<div class="droptarget">Drop here!</div>

<script>
// Events fired on the drag target

document.addEventListener("dragstart", function(event) {
  // The dataTransfer.setData() method sets the data type and the value of the dragged data
  event.dataTransfer.setData("Text", event.target.id);

  // Output some text when starting to drag the p element
  document.getElementById("demo").innerHTML = "Started to drag the p element.";

  // Change the opacity of the draggable element
  event.target.style.opacity = "0.4";
});

// While dragging the p element, change the color of the output text
document.addEventListener("drag", function(event) {
  document.getElementById("demo").style.color = "red";
});

// Output some text when finished dragging the p element and reset the opacity
document.addEventListener("dragend", function(event) {
  document.getElementById("demo").innerHTML = "Finished dragging the p element.";
  event.target.style.opacity = "1";
});


// Events fired on the drop target

// When the draggable p element enters the droptarget, change the DIVS's border style
document.addEventListener("dragenter", function(event) {
  if ( event.target.className == "droptarget" ) {
    event.target.style.border = "3px dotted red";
  }
});

// By default, data/elements cannot be dropped in other elements. To allow a drop, we must prevent the default handling of the element
document.addEventListener("dragover", function(event) {
  event.preventDefault();
});

// When the draggable p element leaves the droptarget, reset the DIVS's border style
document.addEventListener("dragleave", function(event) {
  if ( event.target.className == "droptarget" ) {
    event.target.style.border = "";
  }
});

/* On drop - Prevent the browser default handling of the data (default is open as link on drop)
Reset the color of the output text and DIV's border color
Get the dragged data with the dataTransfer.getData() method
The dragged data is the id of the dragged element ("drag1")
Append the dragged element into the drop element
*/
document.addEventListener("drop", function(event) {
  event.preventDefault();
  if ( event.target.className == "droptarget" ) {
    document.getElementById("demo").style.color = "";
    event.target.style.border = "";
    var data = event.dataTransfer.getData("Text");
    event.target.appendChild(document.getElementById(data));
  }
});
</script>
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Browser Support

ondrag is a DOM Level 3 (2004) feature.

It is fully supported in all browsers:

Chrome Edge Firefox Safari Opera IE
Yes Yes Yes Yes Yes 9-11