Скролл мышью

const speed = 2

document.querySelectorAll('.scroll-block').forEach(scroll => {
  let left = 0,
    coorX = 0,
    drag = false

  scroll.addEventListener('mousedown', function (e) {
    drag = true
    coorX = e.pageX - this.offsetLeft
  });
  document.addEventListener('mouseup', function () {
    drag = false
    left = scroll.scrollLeft
  });
  scroll.addEventListener('mousemove', function (e) {
    drag ? this.scrollLeft = left - (e.pageX - this.offsetLeft - coorX) * speed : ''
  });
})