HTMLElement: dragleave event

The dragleave event is fired when a dragged element or text selection leaves a valid drop target.

Bubbles Yes
Cancelable No
Default action None.
Interface DragEvent
Event handler property ondragleave

Examples

Resetting drop zone styles on dragleave

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 give the other container a purple background while the draggable element is over it, to signal that the draggable element could be dropped on to the container. We listen for the dragleave event to reset the container background when the draggable element is dragged off the container.

Note though that in this partial example we haven't implemented dropping: 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="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;
}

.dropzone.dragover {
  background-color: purple;
}

JavaScript

const target = document.getElementById("droptarget");
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");
  }
});

Result

Specifications

No specification found

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Browser compatibility

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See also