HTML code to have a draggable element, here I use a span and set its draggable property to true.
<div class="Row">
<span id="xxx" draggable="true" style="margin-left: 20px;"></span>
</div>This is the JavaScript code to handle the drag and drop events.
document.addEventListener( 'dragstart', function ( event ) {
const rawName = event.target.id;
const thumbnailName = rawName + '_128x128.png';
event.dataTransfer.dropEffect = 'copy';
var img = new Image();
img.src = thumbnailName;
event.dataTransfer.setDragImage(img, 64, 64);
event.dataTransfer.setData("rawName", rawName);
} );
document.addEventListener( 'drop', function ( event ) {
event.preventDefault();
const rawName = event.dataTransfer.getData("rawName");
const modelToLoad = rawName + '.glb';
editor.loader.loadFile(modelToLoad);
} );