Does the HTML5 Drag and Drop API work on touch devices?
No. The HTML5 Drag and Drop API does not work on touch devices. For touch support, use touch events (touchstart, touchmove, touchend) or a library like SortableJS that handles both mouse and touch.
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More FAQs in How to Build a Drag and Drop List in an Interview
Make items draggable=true. On dragstart, store the dragged index. On dragover, prevent default and reorder the DOM (insertBefore). On dragend, sync the data. Add CSS for visual feedback (opacity, cursor). Handle edge cases.
dragstart (drag begins), drag (during drag), dragenter (drag enters a target), dragover (drag over a target, must preventDefault to allow drop), dragleave (drag leaves a target), drop (item is dropped), dragend (drag ends).
Because by default, elements do not allow drops. preventDefault on dragover tells the browser that this element is a valid drop target. Without it, the drop event never fires.
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