CSS3创建的Circle Loader动画特效代码

使用方法

@property --nose {
  syntax: "<percentage>";
  initial-value: 0%;
  inherits: true;
}

@property --tail {
  syntax: "<percentage>";
  initial-value: 0%;
  inherits: true;
}

:root {
  --size: 25;
}
.cd__main{
   background: hsl(0, 0%, 8%) !important;
}

body {
  display: grid;
  place-items: center;
  min-height: 100vh;
  background: hsl(0, 0%, 8%);
}

.loader {
  height: calc(var(--size) * 1vmin);
  width: calc(var(--size) * 1vmin);
  position: relative;
  border-style: solid;
  border-width: 5vmin;
  border-color: transparent;
  border-radius: 50%;
  -webkit-mask: conic-gradient(
    from 45deg,
    transparent 0 var(--tail),
    white 0 var(--nose),
    transparent 0
  );
          mask: conic-gradient(
    from 45deg,
    transparent 0 var(--tail),
    white 0 var(--nose),
    transparent 0
  );
  -webkit-animation: load 2.5s both infinite ease-in-out, spin 3.25s infinite linear;
          animation: load 2.5s both infinite ease-in-out, spin 3.25s infinite linear;
}

.loader::after {
  content: "";
  position: absolute;
  inset: -5vmin;
  background: conic-gradient(
      from 95deg in hsl longer hue,
      hsl(240deg 100% 75%),
      hsl(240deg 100% 75%)
    ) -5vmin -5vmin / calc(100% + 10vmin) calc(100% + 10vmin);
  background: goldenrod;
  border-style: solid;
  border-width: 5vmin;
  border-color: transparent;
  border-radius: 50%;
  -webkit-mask: linear-gradient(white 0 0) padding-box,
    linear-gradient(white 0 0);
  -webkit-mask-composite: xor;
          mask: linear-gradient(white 0 0) padding-box exclude,
    linear-gradient(white 0 0);
}

@-webkit-keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

@-webkit-keyframes load {
  0% {
    --tail: 0%;
    --nose: 0%;
  }
  40%,
  60% {
    --nose: 100%;
    --tail: 0%;
  }
  100% {
    --nose: 100%;
    --tail: 100%;
  }
}

@keyframes load {
  0% {
    --tail: 0%;
    --nose: 0%;
  }
  40%,
  60% {
    --nose: 100%;
    --tail: 0%;
  }
  100% {
    --nose: 100%;
    --tail: 100%;
  }
}

@supports (background: conic-gradient(from 95deg in hsl longer hue, red, red)) {
  .loader::after {
    background: conic-gradient(
        from 95deg in hsl longer hue,
        hsl(240deg 100% 75%),
        hsl(240deg 100% 75%)
      ) -5vmin -5vmin / calc(100% + 10vmin) calc(100% + 10vmin);
  }
}