Baseline Widely available
The DataTransfer.setData() method sets the drag operation's drag data to the specified data and type. If data for the given type does not exist, it is added at the end of the drag data store, such that the last item in the types list will be the new type. If data for the given type already exists, the existing data is replaced in the same position. That is, the order of the types list is not changed when replacing data of the same type.
Example data types are text/plain and text/uri-list.
format
A string representing the type of the drag data to add to the DataTransfer.
data
A string representing the data to add to the DataTransfer.
None (undefined).
In this example we can drag a <p> element into a target <div> element.
In the dragstart handler, we use setData() to add the id of the <p> element to the DataTransfer object.
In the drop handler we retrieve the id and use it to move the <p> element into the target.
<div>
<p id="source" draggable="true">
Select this element, drag it to the drop zone and then release the selection
to move the element.
</p>
</div>
<div id="target">Drop Zone</div>
<button id="reset">Reset example</button>
div {
margin: 0.5em 0;
padding: 2em;
}
#target,
#source {
border: 1px solid black;
padding: 0.5rem;
}
.dragging {
background-color: pink;
}
const source = document.querySelector("#source");
source.addEventListener("dragstart", (ev) => {
console.log("dragStart");
// Change the source element's background color
// to show that drag has started
ev.currentTarget.classList.add("dragging");
// Clear the drag data cache (for all formats/types)
ev.dataTransfer.clearData();
// Set the drag's format and data.
// Use the event target's id for the data
ev.dataTransfer.setData("text/plain", ev.target.id);
});
source.addEventListener("dragend", (ev) =>
ev.target.classList.remove("dragging"),
);
const target = document.querySelector("#target");
target.addEventListener("dragover", (ev) => {
console.log("dragOver");
ev.preventDefault();
});
target.addEventListener("drop", (ev) => {
console.log("Drop");
ev.preventDefault();
// Get the data, which is the id of the source element
const data = ev.dataTransfer.getData("text");
const source = document.getElementById(data);
ev.target.appendChild(source);
});
const reset = document.querySelector("#reset");
reset.addEventListener("click", () => document.location.reload());
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