HTMLElement: drag event

The drag event is fired every few hundred milliseconds as an element or text selection is being dragged by the user.

Bubbles Yes
Cancelable Yes
Default action Continue the drag & drop operation.
Interface DragEvent
Event handler property ondrag

Examples

Drag and drop example

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;
}

.dragging {
  opacity: .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("droptarget");
target.addEventListener("dragover", event => {
  // prevent default to allow drop
  event.preventDefault();
}, false);

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");
    dragged.parentNode.removeChild(dragged);
    event.target.appendChild(dragged);
  }
});

Result

Specifications

No specification found

No specification data found for api.HTMLElement.drag_event.
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Browser compatibility

No compatibility data found for api.HTMLElement.drag_event.
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See also