src/helpers/scrollTop/scrollTop.js

const scrollToTop = duration => {
  const cosParameter = window.scrollY / 2;
  let scrollCount = 0;
  let oldTimestamp = performance.now();
  const step = newTimestamp => {
    scrollCount += Math.PI / (duration / (newTimestamp - oldTimestamp));
    if (scrollCount >= Math.PI) window.scrollTo(0, 0);
    if (window.scrollY === 0) return;
    window.scrollTo(
      0,
      Math.round(cosParameter + cosParameter * Math.cos(scrollCount)),
    );
    oldTimestamp = newTimestamp;
    window.requestAnimationFrame(step);
  };
  window.requestAnimationFrame(step);
};

export default scrollToTop;