Function scrollViewportVertically

handsontable/test/helpers/common.js:685–703

(y)

 * @param {number} y The scroll position.
 */
export async function scrollViewportVertically(y) {
  const isWindow = hot().view._wt.wtOverlays.scrollableElement === hot().rootWindow;
  const scrollableElement = isWindow ? window : getMaster().find('.wtHolder')[0];

  return new Promise((resolve) => {
    const scrollHandler = () => {
      scrollableElement.removeEventListener('scroll', scrollHandler);
      resolve();
    };

    scrollableElement.addEventListener('scroll', scrollHandler);

    if (isWindow) {
      scrollableElement.scrollTo(scrollableElement.scrollX, y);
    } else {
      scrollableElement.scrollTop = y;
    }
  });
}

/**
 * Moves the table's viewport to the specified x scroll position.