<script>
    function getScoll() {
      return {
        left: window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,
        top: window.pageYOffset || document.documentElement.scrollTop || document.body.scrollTop
      }
    }

    window.onscroll = function () {
      console.log('页面纵向滚出去的距离为：' + getScoll().top + 'px')
    }
  </script>