HTMLElement: dragover event
The dragover
event is fired when an element or text selection is being dragged over a valid drop target (every few hundred milliseconds).
The event is fired on the drop target(s).
Bubbles | Yes |
---|---|
Cancelable | Yes |
Default action | Reset the current drag operation to "none". |
Interface | DragEvent |
Event handler property | ondragover |
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 then releasing it.
We use three event handlers here:
- in the
dragstart
event handler, we get a reference to the element that the user dragged - in the
dragover
event handler for the target container, we callevent.preventDefault()
, which enables it to receivedrop
events. - in the
drop
event handler for the drop zone, we handle moving the draggable element from the original container to the drop zone.
For a more 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="droptarget"></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;
}
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("droptarget");
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
No specification found
No specification data found for api.HTMLElement.dragover_event
.
Check for problems with this page or contribute a missing spec_url
to mdn/browser-compat-data. Also make sure the specification is included in w3c/browser-specs.
Browser compatibility
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.
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