JavaScript-leaning/basicAction.html at master · LaderBen/JavaScript-leaning · GitHub

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<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>基础运动</title>
  <style>
    #div1 {
      width:200px;
      height: 200px;
      background:red;
      position:absolute;
      left: 0px;
      top:150px;
    }
    #div2 {
      width:200px;
      height: 200px;
      background:green;
      position:absolute;
      left:200px;
      top:150px;
    }
    #div3 {
      width:200px;
      height: 200px;
      background: greenyellow;
      position:absolute;
      left:400px;
      top:150px;
    }
    #div4 {
      width:200px;
      height: 200px;
      background:yellow;
      position:absolute;
      left:600px;
      top:150px;
    }
  </style>
  <script>
    setInterval(function(){
      var oDiv1 = document.getElementById('div1');
      var oDiv2 = document.getElementById('div2');
      var oDiv3 = document.getElementById('div3');
      var oDiv4 = document.getElementById('div4');

      oDiv1.style.left=oDiv1.offsetLeft+1 +'px';
      oDiv2.style.left=oDiv2.offsetLeft+1 +'px';
      oDiv3.style.left=oDiv3.offsetLeft+1 +'px';
      oDiv4.style.left=oDiv4.offsetLeft+1 +'px';

    },30);

  </script>
</head>

<body>
  <div id="div1"></div>
  <div id="div2"></div>
  <div id="div3"></div>
  <div id="div4"></div>
<!--
  offsetTop：获取物体上边距
  offsetLeft：获取物体左边距

  offsetWidth：获取物体宽度
  offsetHeight：获取物体高度
-->

</body>

</html>