css打开关闭动画

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html

css

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html

css

div,
span {
  display: block;
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  border-radius: 50%;
}
div {
  transform: rotate(calc(var(--i) * 60deg));
}
span {
  background: radial-gradient(circle, hsl(143, 100%, 56%), hsl(203, 100%, 56%));
  --clip-path: polygon(50% 49.9%, 79.5% 100%, 20.5% 100%);
  -webkit-clip-path: var(--clip-path);
  clip-path: var(--clip-path);
  transform-origin: 20% 80%;
  animation: open 6000ms infinite alternate ease-in-out;
}

@keyframes open {
  100% {
    transform: rotate(90deg);
  }
}
@keyframes gear {
  100% {
    transform: rotate(-60deg);
  }
}

main {
  position: relative;
  margin: auto;
  width: 80vmin;
  height: 80vmin;
  overflow: hidden;
  border: 5vmin double hsl(253, 100%, 20%);
  border-radius: 50%;
  background: radial-gradient(
    circle,
    hsl(233, 100%, 56%) 0%,
    hsla(263, 100%, 46%, 0) 80%
  );
  animation: gear 6000ms infinite alternate ease-in-out;
}

body {
  height: 100vh;
  overflow: hidden;
  display: flex;
  background: radial-gradient(circle, hsl(243, 100%, 16%), hsl(243, 100%, 6%));
}

* {
  box-sizing: border-box;
  margin: 0;
}

JavaScript

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