css3 动画 -- 加载动画 Loader

1.html

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<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>
    <link rel="stylesheet" href="style.css" />
  </head>
  <body>
    <div class="loader"></div>
  </body>
</html>

2.css

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* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  background: #000;
}
.loader {
  position: absolute;
  width: 150px;
  height: 150px;
  border-radius: 50%;
  background: linear-gradient(45deg, transparent, transparent 40%, #e5f403);
  animation: animate 2s linear infinite;
}
@keyframes animate {
  0% {
    transform: rotate(0deg);
    filter: hue-rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
    filter: hue-rotate(360deg);
  }
}
.loader::before {
  content: "";
  position: absolute;
  top: 6px;
  left: 6px;
  right: 6px;
  bottom: 6px;
  background: #000;
  border-radius: 50%;
  z-index: 1000;
}
.loader::after {
  content: "";
  position: absolute;
  top: 0px;
  left: 0px;
  right: 0px;
  bottom: 0px;
  background: linear-gradient(45deg, transparent, transparent 40%, #e5f403);
  border-radius: 50%;
  z-index: 1;
  filter: blur(30px);
}

3.效果图

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