Function drop

plugins/Swap/Swap.js:42–56

({ activeSortable, putSortable, dragEl })

			cancel();
		},
		drop({ activeSortable, putSortable, dragEl }) {
			let toSortable = (putSortable || this.sortable);
			let options = this.options;
			lastSwapEl && toggleClass(lastSwapEl, options.swapClass, false);
			if (lastSwapEl && (options.swap || putSortable && putSortable.options.swap)) {
				if (dragEl !== lastSwapEl) {
					toSortable.captureAnimationState();
					if (toSortable !== activeSortable) activeSortable.captureAnimationState();
					swapNodes(dragEl, lastSwapEl);

					toSortable.animateAll();
					if (toSortable !== activeSortable) activeSortable.animateAll();
				}
			}
		},
		nulling() {
			lastSwapEl = null;
		}