css3 -preserve-3d案例

代码：
html

 <div class="flipper"> 
    <span class="flipper-object flipper-vertical">
      <span class="panel front">The Front</span>
      <span class="panel back">The Back</span>
    </span>
  </div>

style:

.flipper {
      height: 100px;
      width: 100px;
      margin:0 auto;
      perspective: 400px;  //父元素设置视距，越大3d效果越不明显
      position: relative;    //这里给子元素做定位参考
    }
    .flipper-object {
      position: absolute;
      transition: transform 1s;
      transform-style: preserve-3d;   // 这个一定要设置
    }
    .panel {
      top:0;
      position: absolute;
      backface-visibility: hidden;   //背面隐藏
    }
    .flipper-vertical .back {           //下面这四个类决定是上下翻转，还是左右翻转
      transform: rotateX(180deg)
    }
    .filter-horizontal .back {
      transform: rotateY(180deg)
    }
    .flipper:hover .flipper-vertical {
      transform: rotateX(180deg)
    }
    .flipper:hover .flipper-horizontal {
      transform: rotateX(180deg)
    }

完整代码：

<!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>transform3D变换</title>
  <style>
    .flipper {
      height: 100px;
      width: 100px;
      margin:0 auto;
      perspective: 400px; 
      position: relative;
    }
    .flipper-object {
      position: absolute;
      transition: transform 1s;
      transform-style: preserve-3d;
    }
    .panel {
      top:0;
      position: absolute;
      backface-visibility: hidden;
    }
    .flipper-vertical .back {
      transform: rotateX(180deg)
    }
    .filter-horizontal .back {
      transform: rotateY(180deg)
    }
    .flipper:hover .flipper-vertical {
      transform: rotateX(180deg)
    }
    .flipper:hover .flipper-horizontal {
      transform: rotateX(180deg)
    }
  </style>
</head>
<body>
  <div class="flipper"> 
    <span class="flipper-object flipper-vertical">
      <span class="panel front">The Front</span>
      <span class="panel back">The Back</span>
    </span>
  </div>
</body>
</html>

css3 -preserve-3d案例

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