Function onPanDown

src/components/createDataZoomSlider.ts:254–254

(e: PointerEvent)

  const onLeftDown = (e: PointerEvent): void => startDrag(e, 'left-handle');
  const onRightDown = (e: PointerEvent): void => startDrag(e, 'right-handle');
  const onPanDown = (e: PointerEvent): void => startDrag(e, 'pan-window');

  leftHandle.addEventListener('pointerdown', onLeftDown, { passive: false });
  rightHandle.addEventListener('pointerdown', onRightDown, { passive: false });