如何判断滚动窗格在javascript中滚动的方式？

var scrollPane = document.getElementById('scroll-pane');

scrollPane.addEventListener('scroll', function(event) {
  var prevScrollLeft = scrollPane.scrollLeft;
  var prevScrollTop = scrollPane.scrollTop;

  // 滚动事件回调函数中的判断逻辑
  if (scrollPane.scrollLeft > prevScrollLeft) {
    console.log('水平向右滚动');
  } else if (scrollPane.scrollLeft < prevScrollLeft) {
    console.log('水平向左滚动');
  }

  if (scrollPane.scrollTop > prevScrollTop) {
    console.log('垂直向下滚动');
  } else if (scrollPane.scrollTop < prevScrollTop) {
    console.log('垂直向上滚动');
  }
});