奇特的加载动画

动画一

  <div class="load-container">
    <div class="boxLoading"></div>
  </div>

.load-container {
  position: relative;
  width: 100px;
  height: 100px;
  margin: 0 auto;
  .boxLoading {
    width: 50px;
    height: 50px;
    margin: auto;
    position: absolute;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    &:before {
      content: "";
      width: 50px;
      height: 5px;
      background: #000;
      opacity: 0.1;
      position: absolute;
      top: 59px;
      left: 0;
      border-radius: 50%;
      animation: shadow 0.5s linear infinite;
    }
    &:after {
      content: "";
      width: 50px;
      height: 50px;
      background: #00adb5;
      animation: animate 0.5s linear infinite;
      position: absolute;
      top: 0;
      left: 0;
      border-radius: 3px;
    }
  }
}

@keyframes animate {
  17% {
    border-bottom-right-radius: 3px;
  }
  25% {
    transform: translateY(9px) rotate(22.5deg);
  }
  50% {
    transform: translateY(18px) scale(1, 0.9) rotate(45deg);
    border-bottom-right-radius: 40px;
  }
  75% {
    transform: translateY(9px) rotate(67.5deg);
  }
  100% {
    transform: translateY(0) rotate(90deg);
  }
}

@keyframes shadow {
  0%,
  100% {
    transform: scale(1, 1);
  }
  50% {
    transform: scale(1.2, 1);
  }
}

动画二

<div class="loader-container">
  <div class="loader-child"></div>
  <div class="loader-child"></div>
  <div class="loader-child"></div>
</div>

.loader-container {
  width: 100px;
  height: 100px;
  perspective: 780px;
  position: relative;
}

.loader-child {
  position: absolute;
  width: 100%;
  height: 100%;
  box-sizing: border-box;
  border-radius: 50%;

  &:nth-of-type(1) {
    left: 0%;
    top: 0%;
    animation: rotate-one 1.15s linear infinite;
    border-bottom: 3px solid #5c5edc;
  }
  &:nth-of-type(2) {
    right: 0%;
    top: 0%;
    animation: rotate-two 1.15s linear infinite;
    border-right: 3px solid #9e85c3;
  }
  &:nth-of-type(3) {
    right: 0%;
    bottom: 0%;
    animation: rotate-three 1.15s linear infinite;
    border-top: 3px solid #e9908a;
  }
}

@keyframes rotate-one {
  0% {
    transform: rotateX(35deg) rotateY(-45deg) rotateZ(0deg);
  }
  100% {
    transform: rotateX(35deg) rotateY(-45deg) rotateZ(360deg);
  }
}

@keyframes rotate-two {
  0% {
    transform: rotateX(50deg) rotateY(10deg) rotateZ(0deg);
  }
  100% {
    transform: rotateX(50deg) rotateY(10deg) rotateZ(360deg);
  }
}

@keyframes rotate-three {
  0% {
    transform: rotateX(35deg) rotateY(55deg) rotateZ(0deg);
  }
  100% {
    transform: rotateX(35deg) rotateY(55deg) rotateZ(360deg);
  }
}

参考文档：CSS Tricks