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位置属性 + 动画 = 飞舞的气泡
人生如梦
Original
478 people have browsed it
  1. <!DOCTYPE html>
  2. <html lang="en">
  3. <head>
  4.     <meta charset="UTF-8">
  5.     <title>Title</title>
  6.     <style>
  7.         #box {
  8.             width: 500px;
  9.             height: 500px;
  10.             background: #EEEEEE;
  11.             border: 10px solid #FE3232;
  12.             position: relative;
  13.             margin: 0 auto;
  14.         }
  16.         .bool {
  17.             border-radius: 50%;
  18.             box-shadow: 2px 3px 5px #999999;
  19.             position: absolute;
  20.         }
  21.     </style>
  22. </head>
  23. <body>
  24. <button id="add">add</button>
  25. <div id="box">
  26. </div>
  27. <script>
  28.     function get_rand(little, big) {
  29.         return Math.floor(Math.random() * (big - little + 1)) + little;
  30.     }
  32.     var colorArr = [
  33.         '#FE3232',
  34.         '#ccdd22',
  35.         '#223355',
  36.         '#22aa66',
  37.         '#cc6699',
  38.         '#123456',
  39.         '#987654',
  40.         '#FEDCBA',
  41.         '#AB39EE',
  42.         '#985421'
  43.     ]
  44.     var boxObj = document.getElementById('box');
  45.     var addObj = document.getElementById('add');
  47.     addObj.onclick = function () {
  48.         var nObj = document.createElement('div');
  49.         var wh = get_rand(10, 50);
  50.         nObj.style.width = wh + 'px';
  51.         nObj.style.height = wh + 'px';
  52.         nObj.style.background = colorArr[get_rand(0, 9)];
  53.         var top = boxObj.clientHeight / 2 - nObj.offsetHeight / 2;
  54.         var left = boxObj.clientWidth / 2 - nObj.offsetWidth / 2;
  55.         nObj.style.top = top + 'px';
  56.         nObj.style.left = left + 'px';
  57.         nObj.className = 'bool';
  58.         boxObj.appendChild(nObj);
  59.         var xx = get_rand(1, 10);
  60.         var yy = get_rand(1, 10);
  62.         setInterval(function () {
  63.             top += xx;
  64.             left += yy;
  66.             if (top > boxObj.clientHeight - nObj.offsetHeight || top < 0) {
  67.                 xx = -xx;
  68.             }
  69.             if (left > boxObj.clientWidth - nObj.offsetWidth || left < 0) {
  70.                 yy = -yy;
  72.             }
  73.             nObj.style.top = top + 'px';
  74.             nObj.style.left = left + 'px';
  75.         }, 50)
  76.     }
  79. </script>
  80. </body>
  81. </html>

Correcting teacher：PHPzPHPz

Correction status：qualified

Teacher's comments：
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