Dustbin - Within an iframe
The HTML5 backend works inside an iframe because Bdnd listens to the native drag events of whatever document it runs in. Below, a self-contained dustbin demo is hosted in its own iframe document - dragging works entirely within it.
A single
BdndProvider (and its BdndDragDropManager) lives in one
document, so dragging across the iframe boundary into the parent page is not
supported by the HTML5 backend - the same limitation React DnD has without a
cross-window backend setup.