DataTransfer: getData() method

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 DataTransfer.getData() method retrieves drag data (as a string) for the specified type. If the drag operation does not include data, this method returns an empty string.

Example data types are text/plain and text/uri-list.

Syntax

js
getData(format)

Parameters

format

A string representing the type of data to retrieve.

Return value

A string representing the drag data for the specified format. If the drag operation has no data or the operation has no data for the specified format, this method returns an empty string.

Note that DataTransfer.getData() may not return an expected value, because it only allows reading and writing data for specified events. During the dragstart and drop events, it is safe to access the data. For all other events, the data should be considered unavailable. Despite this, the items and their formats can still be enumerated.

Examples

This example shows the use of the DataTransfer object's getData() and setData() methods.

HTML

html
<div id="div1" ondrop="drop(event)" ondragover="allowDrop(event)">
  <span id="drag" draggable="true" ondragstart="drag(event)"
    >drag me to the other box</span
  >
</div>
<div id="div2" ondrop="drop(event)" ondragover="allowDrop(event)"></div>

CSS

css
#div1,
#div2 {
  width: 100px;
  height: 50px;
  padding: 10px;
  border: 1px solid #aaaaaa;
}

JavaScript

js
function allowDrop(allowDropEvent) {
  allowDropEvent.target.style.color = "blue";
  allowDropEvent.preventDefault();
}

function drag(dragEvent) {
  dragEvent.dataTransfer.setData("text", dragEvent.target.id);
  dragEvent.target.style.color = "green";
}

function drop(dropEvent) {
  dropEvent.preventDefault();
  const data = dropEvent.dataTransfer.getData("text");
  dropEvent.target.appendChild(document.getElementById(data));
  document.getElementById("drag").style.color = "black";
}

Result

Specifications

Specification
HTML
# dom-datatransfer-getdata-dev

Browser compatibility

See also