Function scrollViewportHorizontally

handsontable/test/helpers/common.js:710–729

(x)

 * @param {number} x The scroll position.
 */
export async function scrollViewportHorizontally(x) {
  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);
    x = hot().isRtl() ? -x : x;

    if (isWindow) {
      scrollableElement.scrollTo(x, scrollableElement.scrollY);
    } else {
      scrollableElement.scrollLeft = x;
    }
  });
}

/**
 * Moves the browser's viewport to the specified x and y scroll position.