轻松进行水平单击和拖动滚动

Question

我找到了一种在水平div中单击和滚动的好方法

slider.addEventListener('mousedown', (e) => {
  isDown = true;
  slider.classList.add('active');
  startX = e.pageX - slider.offsetLeft;
  scrollLeft = slider.scrollLeft;
});
slider.addEventListener('mouseleave', () => {
  isDown = false;
  slider.classList.remove('active');
});
slider.addEventListener('mouseup', () => {
  isDown = false;
  slider.classList.remove('active');
});
slider.addEventListener('mousemove', (e) => {
  if(!isDown) return;
  e.preventDefault();
  const x = e.pageX - slider.offsetLeft;
  const walk = (x - startX) * 3; //scroll-fast
  slider.scrollLeft = scrollLeft - walk;
  console.log(slider.scrollLeft);
});

https://codepen.io/toddwebdev/pen/yExKoj

唯一的事情是我也希望通过单击和拖动来放松。我能找到的唯一示例是使用jQuery，我尝试从该示例http://jsfiddle.net/36dp03ur/复制逻辑，但无济于事