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CSS与动画-1-闪烁效果 #9

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OndayX opened this issue Apr 25, 2021 · 0 comments
Open

CSS与动画-1-闪烁效果 #9

OndayX opened this issue Apr 25, 2021 · 0 comments

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@OndayX
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OndayX commented Apr 25, 2021 

<!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>
</head>
<style>
  .point {
    width: 50px;
    height: 50px;
    background-color: #2ea598;
    position: relative;
    border-radius: 50%;
  }
 
  /* 设置动画前颜色 */
  .point-flicker:after {
    background-color: #2ea598;
  }
 
  /* 设置动画后颜色 */
  .point-flicker:before {
    background-color: rgba(0, 168, 253, 0.2);
  }
 
  /* 设置动画 */
  .point-flicker:before,
  .point-flicker:after {
    content: '';
    width: 80px;
    height: 80px;
    position: absolute;
    left: 50%;
    top: 50%;
    margin-left: -40px;
    margin-top: -40px;
    border-radius: 50%;
    /* CSS3 animation 属性 网址 */
    /* https://www.w3school.com.cn/cssref/pr_animation.asp */
    animation: warn 1.5s ease-out 0s infinite;
  }
 
  /* @keyframes 规则用于创建动画。在 @keyframes 中规定某项 CSS 样式，就能创建由当前样式逐渐改为新样式的动画效果。 */
  @keyframes warn {
    0% {
      transform: scale(0.5);
      opacity: 1;
    }
 
    30% {
      opacity: 1;
    }
 
    100% {
      transform: scale(1.4);
      opacity: 0;
    }
  }
</style>
 
<body>
  <div class="point point-flicker">
 
  </div>
</body>
<script>
 
 
</script>
 
</html>

————————————————
版权声明：本文为CSDN博主「人间草木96」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/qq_43258252/article/details/102958790
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@OndayX