ant-design-vue/components/_util/getScroll.js

export default function getScroll (target, top) {
  if (typeof window === 'undefined') {
    return 0
  }

  const prop = top ? 'pageYOffset' : 'pageXOffset'
  const method = top ? 'scrollTop' : 'scrollLeft'
  const isWindow = target === window

  let ret = isWindow ? target[prop] : target[method]
  // ie6,7,8 standard mode
  if (isWindow && typeof ret !== 'number') {
    ret = window.document.documentElement[method]
  }

  return ret
}