css 圆形扩散特效 水波

css 圆形扩散特效 水波_第1张图片

<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>Documenttitle>
  <style>
    .q {
      width: 300px;
      height: 300px;
      position: relative;
      border: 1px solid red;

    }

    .a {
      width: 100px;
      height: 100px;
      border: 1px solid #000;
      background: #000;
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      border-radius: 50%;
      animation: identifier 1s infinite;
      opacity: 0;
    }

    .a2 {
      animation-delay: 0.5s;
    }

    .btn {
      position: absolute;
      top: 50%;
      left: 50%;
      transform: translate(-50%, -50%);
      background: #fff;
      width: 50px;
      height: 50px;
      border-radius: 50%;
      text-align: center;
      line-height: 50px;
    }

    @keyframes identifier {
      0% {
        transform: translate(-50%, -50%) scale(0);
        opacity: 0.8;
      }

      100% {
        transform: translate(-50%, -50%) scale(1.8);
        opacity: 0;
      }
    }
  style>
head>

<body>
  <div class="q">
    <div class="a a1">div>
    <div class="a a2">div>
    <div class="btn">div>
  div>
body>

html>

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