New to React DnD? Read the overview before jumping into the docs.
DragSourceMonitor is an object passed to a collecting function of the DragSource. Its methods let you get information about the drag state of a specific drag source. The specific drag source bound to that monitor is called the monitor's owner below.
canDrag(): Returns true if no drag operation is in progress, and the owner's canDrag() returns true or is not defined.
isDragging(): Returns true if there is a drag operation is in progress, and either the owner initiated the drag, or its isDragging() is defined and returns true.
getItemType(): Returns a string or an ES6 symbol identifying the type of the current dragged item. Returns null if no item is being dragged.
getItem(): Returns a plain object representing the currently dragged item. Every drag source must specify it by returning an object from its beginDrag() method. Returns null if no item is being dragged.
getDropResult(): Returns a plain object representing the last recorded drop result. The drop targets may optionally specify it by returning an object from their drop() methods. When a chain of drop() is dispatched for the nested targets, bottom up, any parent that explicitly returns its own result from drop() overrides the child drop result previously set by the child. Returns null if called outside endDrag().
didDrop() Returns true if some drop target has handled the drop event, false otherwise. Even if a target did not return a drop result, didDrop() returns true. Use it inside endDrag() to test whether any drop target has handled the drop. Returns false if called outside endDrag().
getInitialClientOffset(): Returns the { x, y } client offset of the pointer at the time when the current drag operation has started. Returns null if no item is being dragged.
getInitialSourceClientOffset(): Returns the { x, y } client offset of the drag source component's root DOM node at the time when the current drag operation has started. Returns null if no item is being dragged.
getClientOffset: Returns the last recorded { x, y } client offset of the pointer while a drag operation is in progress. Returns null if no item is being dragged.
getDifferenceFromInitialOffset(): Returns the { x, y } difference between the last recorded client offset of the pointer and the client offset when current the drag operation has started. Returns null if no item is being dragged.
getSourceClientOffset(): Returns the projected { x, y } client offset of the drag source component's root DOM node, based on its position at the time when the current drag operation has started, and the movement difference. Returns null if no item is being dragged.