CSS loader (loading spinner)

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CSS:

.loader {
  width: 50px;
  height: 50px;
  border: 5px solid #f3f3f3;
  border-top: 5px solid #3498db;
  border-radius: 50%;
  animation: spin 1s infinite ease-in-out; /* linear */
  margin: 20px auto;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

HTML:

<div class="loader"></div>

3D loader

CSS:

.loader-3d {
  transform: rotateZ(45deg);
  perspective: 1000px;
  border-radius: 50%;
  width: 120px;
  height: 120px;
  color: #3498db;
  margin: 50px auto;
}
.loader-3d:before,
.loader-3d:after {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  width: inherit;
  height: inherit;
  border-radius: 50%;
  transform: rotateX(70deg);
  animation: 1s spin linear infinite;
}
.loader-3d:after {
  color: #999;
  transform: rotateY(70deg);
  animation-delay: 0.4s;
}

@keyframes rotate {
  0% {
    transform: translate(-50%, -50%) rotateZ(0deg);
  }
  100% {
    transform: translate(-50%, -50%) rotateZ(360deg);
  }
}

@keyframes rotateccw {
  0% {
    transform: translate(-50%, -50%) rotate(0deg);
  }
  100% {
    transform: translate(-50%, -50%) rotate(-360deg);
  }
}

@keyframes spin {
  0%,
  100% {
    box-shadow: 0.2em 0 0 0 currentcolor;
  }
  12% {
    box-shadow: 0.2em 0.2em 0 0 currentcolor;
  }
  25% {
    box-shadow: 0 0.2em 0 0 currentcolor;
  }
  37% {
    box-shadow: -0.2em 0.2em 0 0 currentcolor;
  }
  50% {
    box-shadow: -0.2em 0 0 0 currentcolor;
  }
  62% {
    box-shadow: -0.2em -0.2em 0 0 currentcolor;
  }
  75% {
    box-shadow: 0 -0.2em 0 0 currentcolor;
  }
  87% {
    box-shadow: 0.2em -0.2em 0 0 currentcolor;
  }
}

HTML:

<div class="loader-3d"></div>

Links:

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