vue-hooks-plus/es/utils/rect.js

Vue hooks library

const getScrollTop = (el) => {
  if (el === document || el === document.documentElement || el === document.body) {
    return Math.max(
      window.pageYOffset,
      document.documentElement.scrollTop,
      document.body.scrollTop
    );
  }
  return el.scrollTop;
};
const getScrollHeight = (el) => {
  return el.scrollHeight || Math.max(document.documentElement.scrollHeight, document.body.scrollHeight);
};
const getClientHeight = (el) => {
  return el.clientHeight || Math.max(document.documentElement.clientHeight, document.body.clientHeight);
};
export {
  getClientHeight,
  getScrollHeight,
  getScrollTop
};