js实现无缝滚动

  • js+css实现单行数据无缝滚动
  • 工作遇到需求:很多条数据可以一条一条向上滚.
<!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>
  <style>
    * {
      margin: 0;
      padding: 0
    }

    #box {
      height: 140px;
      width: 400px;
      border: 1px solid #cccccc;
      color: hotpink;
      overflow: hidden;
      margin: 50px auto;
      text-align: center;
    }
  </style>
</head>

<body>
  <div id="box">
    <ul id="ul1">
      <li>1111111111111111111111</li>
      <li>2222222222222222222222</li>
      <li>3333333333333333333333</li>
      <li>4444444444444444444444</li>
      <li>5555555555555555555555</li>
      <li>6666666666666666666666</li>
      <li>7777777777777777777777</li>
      <li>8888888888888888888888</li>
      <li>9999999999999999999999</li>
    </ul>
    <ul id="ul2"></ul>
  </div>
  <script>
    window.onload = roll(50);

    // 传入的 t 为滚动快慢的时间
    function roll(t) {
        console.log(1);
        let ul1 = document.getElementById("ul1");
      let ul2 = document.getElementById("ul2");
      let box = document.getElementById("box");
      ul2.innerHTML = ul1.innerHTML;
      // 初始化滚动高度
      box.scrollTop = 0;
      let timer = setInterval(rollStart, t);
         box.onmouseover = function () {
           clearInterval(timer)
         }
         box.onmouseout = function () {
           timer = setInterval(rollStart, t);
       }
    }

    function rollStart() {
        if (box.scrollTop >= ul1.scrollHeight) {
        box.scrollTop = 0;
      } else {
        box.scrollTop++;
      }
    }
  </script>
</body>

</html>

  

posted @ 2018-07-09 18:12  Xiao_Qiu  阅读(2914)  评论(0编辑  收藏  举报