The DataTransferItemList.clear()
method removes all DataTransferItem
objects from the drag data items list, leaving the list empty.
Syntax
DataTransferItemList.clear();
Parameters
None.
Return value
Example
This example shows the use of the clear()
method.
HTML
<div> <p id="source" ondragstart="dragstart_handler(event);" ondragend="dragend_handler(event);" 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" ondrop="drop_handler(event);" ondragover="dragover_handler(event);">Drop Zone</div>
CSS
div { margin: 0em; padding: 2em; } #source { color: blue; border: 1px solid black; } #target { border: 1px solid black; }
JavaScript
function dragstart_handler(ev) { console.log("dragStart"); // Add this element's id to the drag payload so the drop handler will // know which element to add to its tree var dataList = ev.dataTransfer.items; dataList.add(ev.target.id, "text/plain"); // Add some other items to the drag payload dataList.add("<p>... paragraph ...</p>", "text/html"); dataList.add("http://www.example.org","text/uri-list"); } function drop_handler(ev) { console.log("Drop"); ev.preventDefault(); var data = event.dataTransfer.items; // Loop through the dropped items and log their data for (var i = 0; i < data.length; i++) { if ((data[i].kind == 'string') && (data[i].type.match('^text/plain'))) { // This item is the target node data[i].getAsString(function (s){ ev.target.appendChild(document.getElementById(s)); }); } else if ((data[i].kind == 'string') && (data[i].type.match('^text/html'))) { // Drag data item is HTML data[i].getAsString(function (s){ console.log("... Drop: HTML = " + s); }); } else if ((data[i].kind == 'string') && (data[i].type.match('^text/uri-list'))) { // Drag data item is URI data[i].getAsString(function (s){ console.log("... Drop: URI = " + s); }); } } } function dragover_handler(ev) { console.log("dragOver"); ev.preventDefault(); // Set the dropEffect to move ev.dataTransfer.dropEffect = "move" } function dragend_handler(ev) { console.log("dragEnd"); var dataList = ev.dataTransfer.items; for (var i = 0; i < dataList.length; i++) { dataList.remove(i); } // Clear any remaining drag data dataList.clear(); }
Result
Specifications
Specification | Status | Comment |
---|---|---|
WHATWG HTML Living Standard The definition of 'clear()' in that specification. |
Living Standard | |
HTML5.1 The definition of 'clear()' in that specification. |
Recommendation | Not included in W3C HTML5 Recommendation |
Browser compatibility
Feature | Chrome | Edge | Firefox (Gecko) | Internet Explorer | Opera | Safari (WebKit) |
---|---|---|---|---|---|---|
Basic support | 4 | (Yes) | 50 (50) | No support | 12 | No support |
Feature | Android | Android Webview | Chrome for Android | Edge | Firefox Mobile (Gecko) | Firefox OS | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|---|---|---|
Basic support | No support | No support | No support | ? | 50.0 (50) | No support | No support | No support | No support |