如何判断弹窗内容的滚动距离

判断滚动条的滚动距离

  let scrollHeight = document.getElementById('contentDiv').scrollHeight
  let scrollTop = document.getElementById('contentDiv').scrollTop
  let clientHeight = document.getElementById('contentDiv').clientHeight
  if(scrollHeight-clientHeight==scrollTop){
    console.log('滚动到底部')
  }

可以在页面里监听 window.addEventListener('scroll',this.handleScroll,true)