HTMLElement: dragover 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 dragover event is fired when an element or text selection is being dragged over a valid drop target (every few hundred milliseconds).
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("dragover", (event) => { })
ondragover = (event) => { }
Event type
Event properties
In addition to the properties listed below, properties from the parent interface, Event, are available.
DragEvent.dataTransferRead only-
The data that is transferred during a drag-and-drop interaction.
Examples
A minimal drag-and-drop example
In this example, we have a draggable element inside a container. Try grabbing the element, dragging it over the other container, and releasing it.
We use three event handlers here:
- in the
dragstartevent handler, we get a reference to the element that the user dragged - in the
dragoverevent handler for the target container, we callevent.preventDefault(), which enables it to receivedropevents. - in the
dropevent handler for the drop zone, we handle moving the draggable element from the original container to the drop zone.
For a complete example of drag and drop, see the page for the drag event.
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 from 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;
}
JavaScript
let dragged = null;
const source = document.getElementById("draggable");
source.addEventListener("dragstart", (event) => {
// store a ref. on the dragged elem
dragged = event.target;
});
const target = document.getElementById("drop-target");
target.addEventListener("dragover", (event) => {
// prevent default to allow drop
event.preventDefault();
});
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.className === "dropzone") {
dragged.parentNode.removeChild(dragged);
event.target.appendChild(dragged);
}
});
Result
Specifications
| Specification |
|---|
| HTML # handler-ondragover |
| HTML # event-dnd-dragover |
Browser compatibility
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dragover event
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Legend
Tip: you can click/tap on a cell for more information.
- Full support
- Full support