scrollHeight, scrollTop, clientHeight 


<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <meta http-equiv="X-UA-Compatible" content="ie=edge">
  <title>Document</title>
  <script src="jquery.js"></script>
</head>
<body>
  <style>
    .box{
      height: 300px;
      border: 1px solid #000;
      font-size: 50px;
      overflow: auto;
    }
    </style>
  <p class="box" id="box">
      啊啊啊啊啊啊啊 啊啊啊啊啊啊啊 啊啊啊啊啊啊啊 啊啊啊啊啊啊啊 啊啊    
     啊啊啊啊啊 啊啊啊啊啊啊啊 啊啊啊啊啊啊啊 啊啊啊啊啊啊啊
  </p>

  <script>

    var box = document.getElementById("box")
    box.onscroll = function() {
      console.log(box.scrollHeight,box.scrollTop,box.clientHeight);
      if(box.scrollHeight - box.scrollTop == box.clientHeight)
        console.log('到底了！');
    }
  
  </script>
</body>
</html>

 

posted @ 2018-06-04 19:43  龙虾777  阅读(371)  评论(0)  编辑  收藏  举报