useDraggable

Make elements draggable

Usage

Fixed Demo

Live Editor

function Demo() {
  const el = useRef<HTMLDivElement>(null);

  const [initialValue, setInitialValue] = useState({ x: 200 / 2.2, y: 120 });

  useEffect(() => {
    setInitialValue({ x: window.innerWidth / 2.2, y: 120 });
  }, []);

  const [x, y, isDragging] = useDraggable(el, {
    initialValue,
    preventDefault: true,
  });

  return (
    <div>
      <p style={{ textAlign: "center" }}>Check the floating boxes</p>
      <div
        ref={el}
        style={{
          position: "fixed",
          cursor: "move",
          zIndex: 10,
          touchAction: "none",
          padding: 10,
          border: "solid 1px",
          left: x,
          top: y,
        }}
      >
        {isDragging ? "Dragging!" : "👋 Drag me!"}
        <div>
          I am at {Math.round(x)}, {Math.round(y)}
        </div>
      </div>
    </div>
  );
};

Result

Loading...

Relative Demo

Live Editor

function Demo() {
  const el = useRef<HTMLDivElement>(null);
  const scope = useRef<HTMLDivElement>(null);

  const initialValue = { x: 200 / 2.2, y: 120 };

  const [x, y, isDragging, setPosition] = useDraggable(el, {
    initialValue,
    preventDefault: true,
    containerElement: scope,
  });

  return (
    <div
      ref={scope}
      style={{
        width: 500,
        height: 500,
        border: "1px solid blue",
        position: "relative",
      }}
    >
      <button
        style={{ textAlign: "center" }}
        onClick={() => {
          setPosition({
            x: 250,
            y: 250,
          });
        }}
      >
        Set Position
      </button>
      <div
        ref={el}
        style={{
          position: "absolute",
          cursor: "move",
          zIndex: 10,
          touchAction: "none",
          padding: 10,
          border: "solid 1px",
          left: x,
          top: y,
          whiteSpace: "nowrap",
        }}
      >
        {isDragging ? "Dragging!" : "👋 Drag me!"}
        <div style={{ whiteSpace: "nowrap" }}>
          I am at {Math.round(x)}, {Math.round(y)}
        </div>
      </div>
    </div>
  );
};

Result

Loading...

API

useDraggable

Returns

readonly [number, number, boolean, React.Dispatch<React.SetStateAction<Position>>]: A tuple with the following elements:

• x
• y
• Whether the element is being dragged set the element position

Arguments

Argument	Description	Type	DefaultValue
target	dom element	BasicTarget<HTMLElement | SVGElement> (Required)	-
options	optional params	UseDraggableOptions | undefined	-

UseDraggableOptions

Property	Description	Type	DefaultValue
exact	Only start the dragging when click on the element directly	boolean	false
preventDefault	Prevent events defaults	boolean	false
stopPropagation	Prevent events propagation	boolean	false
draggingElement	Element to attach pointermove and pointerup events to.	BasicTarget<HTMLElement | SVGElement>	window
containerElement	Element for calculating bounds (If not set, it will use the event's target).	BasicTarget<HTMLElement | SVGAElement>	undefined
handle	Handle that triggers the drag event	RefObject<HTMLElement | SVGElement>	target
pointerTypes	Pointer types that listen to.	PointerType[]	['mouse', 'touch', 'pen']
initialValue	Initial position of the element.	Position	{ x: 0, y: 0 }
onStart	Callback when the dragging starts. Return false to prevent dragging.	(position: Position, event: PointerEvent) => void | false	-
onMove	Callback during dragging.	(position: Position, event: PointerEvent) => void	-
onEnd	Callback when dragging end.	(position: Position, event: PointerEvent) => void	-

BasicTarget

export type BasicTarget<T extends TargetType = Element> = (() => TargetValue<T>) | TargetValue<T> | MutableRefObject<TargetValue<T>>;

TargetValue

type TargetValue<T> = T | undefined | null;

TargetType

type TargetType = HTMLElement | Element | Window | Document | EventTarget;

PointerType

export type PointerType = 'mouse' | 'touch' | 'pen';

Position

export interface Position {
  x: number;
  y: number;
}