如何为LOGO实现4个圆圈依次出现后结束的涟漪动画效果

涟漪动画实现方案 #

核心修改说明

• 取消默认的无限循环配置，动画仅执行1次
• 新增animation-fill-mode: forwards属性，保证动画结束后停留在最后一帧的完全展示状态
• 调整动画关键帧逻辑，删除末尾涟漪消失的配置，保持完全展开后的视觉效果
• 调整动画时长与延迟配比，保证4个涟漪从内到外依次展开的节奏
• 补充外层相对定位容器，避免绝对定位元素布局偏移

修改后完整代码

CSS代码

html,
body {
  color: #2E4453;
  font-size: 100%;
  font-family: 'Open Sans', Helvetica, Arial, sans-serif;
  font-weight: 400;
  background-color: #D1C4E9;
  margin: 0;
  padding: 0;
  height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
}

.open-dev-radar {
  position: relative;
  width: 400px;
  height: 400px;
}

.open-dev-badge {
  position: absolute;
  left: 50%;
  top: 50%;
  -webkit-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
  width: 90px;
  height: 90px;
  border-radius: 50%;
  background-color: #fff;
  box-shadow: 1px 2px 7px rgba(0, 0, 0, 0.34);
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: center;
}

.gt-dev {
  position: absolute;
  left: 50%;
  top: 50%;
  -webkit-transform: translate(-50%, -50%);
  -ms-transform: translate(-50%, -50%);
  transform: translate(-50%, -50%);
}

.gt-dev:after {
  content: '';
  position: absolute;
  left: 0;
  right: 0;
  top: 0;
  bottom: 0;
  -webkit-transform: scale(0);
  -ms-transform: scale(0);
  transform: scale(0);
  border-radius: 50%;
  border: solid 1px rgba(103, 58, 183, 0.74);
  background-image: -webkit-radial-gradient(circle farthest-corner, rgba(103, 58, 183, 0) 52%, rgba(103, 58, 183, 0.62) 100%);
  background-image: radial-gradient( circle farthest-corner, rgba(103, 58, 183, 0) 52%, rgba(103, 58, 183, 0.62) 100%);
  -webkit-animation-duration: 0.8s;
  animation-duration: 0.8s;
  -webkit-animation-name: pulse;
  animation-name: pulse;
  -webkit-animation-iteration-count: 1;
  animation-iteration-count: 1;
  -webkit-animation-fill-mode: forwards;
  animation-fill-mode: forwards;
  opacity: 0;
  filter: alpha(opacity=0);
}

.gt-dev:nth-child(4) {
  width: 120px;
  height: 120px;
}

.gt-dev:nth-child(3) {
  width: 190px;
  height: 190px;
}

.gt-dev:nth-child(3):after {
  -webkit-animation-delay: 0.2s;
  animation-delay: 0.2s;
}

.gt-dev:nth-child(2) {
  width: 270px;
  height: 270px;
}

.gt-dev:nth-child(2):after {
  -webkit-animation-delay: 0.4s;
  animation-delay: 0.4s;
}

.gt-dev:nth-child(1) {
  width: 370px;
  height: 370px;
}

.gt-dev:nth-child(1):after {
  -webkit-animation-delay: 0.6s;
  animation-delay: 0.6s;
}

@-webkit-keyframes pulse {
  0% {
    -webkit-transform: scale(0);
    transform: scale(0);
    opacity: 0;
    filter: alpha(opacity=0);
  }
  100% {
    -webkit-transform: scale(1);
    transform: scale(1);
    opacity: 1;
    filter: alpha(opacity=100);
  }
}

@keyframes pulse {
  0% {
    -webkit-transform: scale(0);
    transform: scale(0);
    opacity: 0;
    filter: alpha(opacity=0);
  }
  100% {
    -webkit-transform: scale(1);
    transform: scale(1);
    opacity: 0.7;
    filter: alpha(opacity=70);
  }
}

HTML代码

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

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Ripple Animation</title>
  <link rel="stylesheet" href="style.css">
</head>

<body>
  <div class="open-dev-radar">
    <div class="gt-dev"></div>
    <div class="gt-dev"></div>
    <div class="gt-dev"></div>
    <div class="gt-dev"></div>
    <div class="open-dev-badge"><img src="Loader.svg" alt="LOGO"></div>
  </div>
</body>

</html>

内容的提问来源于stack exchange，提问作者Nickos