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).
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).
Use the event name in methods like addEventListener()
, or set an event handler property.
js
addEventListener("dragover", (event) => {}); ondragover = (event) => {};
In addition to the properties listed below, properties from the parent interface, Event
, are available.
DragEvent.dataTransfer
Read only
The data that is transferred during a drag and drop interaction.
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:
dragstart
event handler, we get a reference to the element that the user draggeddragover
event handler for the target container, we call event.preventDefault()
, which enables it to receive drop
events.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; }
js
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); } });
Desktop | Mobile | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | WebView Android | Chrome Android | Firefox for Android | Opera Android | Safari on IOS | Samsung Internet | |
dragover_event |
1 | 12 | 9 | 9 | 12 | 3.1 | 4.4 | 18 | 9 | 12 | 2 | 1.0 |
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https://developer.mozilla.org/en-US/docs/Web/API/HTMLElement/dragover_event