HTMLElement: drag event
Baseline
Widely available
This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.
The drag event is fired repeatedly as an element or text selection is being dragged by the user. The firing frequency depends on the browser, operating system, and pointer movement; do not rely on a fixed interval.
The firing frequency depends on the browser, operating system, and pointer movement. The drag event can continue to fire while the pointer is stationary, and can fire more frequently while it is moving. Do not rely on a fixed interval or expect an event for every pointer movement. The HTML specification uses a firing frequency of roughly 350 ms (±200 ms). In practice, browsers use native drag updates and platform-specific timers to dispatch these events, so this interval does not describe all browser behavior.
This event is cancelable and may bubble up to the Document and Window objects.
Syntax
Use the event name in methods like addEventListener(), or set an event handler property.
addEventListener("drag", (event) => { })
ondrag = (event) => { }
Event type
Examples
Drag and drop example
HTML
<div class="dropzone">
<div id="draggable" draggable="true">This div is draggable</div>
</div>
<div class="dropzone" id="drop-target"></div>
CSS
body {
/* Prevent the user selecting text in the example */
user-select: none;
}
#draggable {
text-align: center;
background: white;
}
.dropzone {
width: 200px;
height: 20px;
background: blueviolet;
margin: 10px;
padding: 10px;
}
.dropzone.dragover {
background-color: purple;
}
.dragging {
opacity: 0.5;
}
JavaScript
let dragged;
/* events fired on the draggable target */
const source = document.getElementById("draggable");
source.addEventListener("drag", (event) => {
console.log("dragging");
});
source.addEventListener("dragstart", (event) => {
// store a ref. on the dragged elem
dragged = event.target;
// make it half transparent
event.target.classList.add("dragging");
});
source.addEventListener("dragend", (event) => {
// reset the transparency
event.target.classList.remove("dragging");
});
/* events fired on the drop targets */
const target = document.getElementById("drop-target");
target.addEventListener("dragover", (event) => {
// prevent default to allow drop
event.preventDefault();
});
target.addEventListener("dragenter", (event) => {
// highlight potential drop target when the draggable element enters it
if (event.target.classList.contains("dropzone")) {
event.target.classList.add("dragover");
}
});
target.addEventListener("dragleave", (event) => {
// reset background of potential drop target when the draggable element leaves it
if (event.target.classList.contains("dropzone")) {
event.target.classList.remove("dragover");
}
});
target.addEventListener("drop", (event) => {
// prevent default action (open as link for some elements)
event.preventDefault();
// move dragged element to the selected drop target
if (event.target.classList.contains("dropzone")) {
event.target.classList.remove("dragover");
event.target.appendChild(dragged);
}
});
Result
Specifications
| Specification |
|---|
| HTML # handler-ondrag |
| HTML # event-dnd-drag |