Function move

packages/react-aria/src/dnd/useAutoScroll.ts:78–108

(x, y)

  return {
    move(x, y) {
      // Most browsers auto scroll natively, but WebKit on macOS does not (iOS does 🤷‍♂️).
      // https://bugs.webkit.org/show_bug.cgi?id=222636
      if (!isWebKit() || isIOS() || !scrollableRef.current) {
        return;
      }

      let box = scrollableRef.current.getBoundingClientRect();
      let left = AUTOSCROLL_AREA_SIZE;
      let top = AUTOSCROLL_AREA_SIZE;
      let bottom = box.height - AUTOSCROLL_AREA_SIZE;
      let right = box.width - AUTOSCROLL_AREA_SIZE;
      if (x < left || x > right || y < top || y > bottom) {
        if (x < left) {
          state.dx = x - left;
        } else if (x > right) {
          state.dx = x - right;
        }
        if (y < top) {
          state.dy = y - top;
        } else if (y > bottom) {
          state.dy = y - bottom;
        }

        if (!state.timer) {
          state.timer = requestAnimationFrame(scroll);
        }
      } else {
        this.stop();
      }
    },
    stop() {
      if (state.timer) {
        cancelAnimationFrame(state.timer);