web api instance method
DataTransfer: getData() method
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
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
<div id="div1">
<span id="drag" draggable="true">drag me to the other box</span>
</div>
<div id="div2"></div>
CSS
#div1,
#div2 {
width: 100px;
height: 50px;
padding: 10px;
border: 1px solid #aaaaaa;
}
JavaScript
const div1 = document.getElementById("div1");
const div2 = document.getElementById("div2");
const dragElement = document.getElementById("drag");
dragElement.addEventListener("dragstart", drag);
div1.addEventListener("dragover", allowDrop);
div2.addEventListener("dragover", allowDrop);
div1.addEventListener("drop", drop);
div2.addEventListener("drop", drop);
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));
dragElement.style.color = "black";
}