JSFiddle - React, Tailwind, and code Playground

by Henry

HTML

<div class="spinner"></div>

SCSS

body {
  background: #000;
}
.spinner {
  position: absolute;
  top: 50%;
  left: 50%;
  z-index: 2;
  transform: translate3d(-50%, -50%, 0);
  
  &::before {
  //&::after {
    position: absolute;
    top: -20px;
    left: -20px;
    // transform: translate3d(-50%, -50%, 0);
    content: '';
    display: block;
    box-sizing: border-box;
    width: 40px;
    height: 40px;
    border-radius: 100%;
    border: 5px solid rgba(255, 255, 255, 0.2);
//    border-top-color: rgba(255, 255, 255, 0.5);
    animation: spin1 1s infinite linear, border 5s infinite alternate, border-top 3s infinite linear;
  }
  
  /* &::after {
    animation: spin1 2s infinite linear, border 9s infinite linear reverse, border-top 7s infinite linear;
  } */
}

@keyframes spin1 {
  100% {
    transform: rotate(360deg);
  }
}

@keyframes spin2 {
  100% {
    transform: rotate(-360deg);
  }
}

@keyframes border {
  0% {
    border-color: rgba(255,50,50,.2)
  }
  25% {
    border-color: rgba(255,255,50,.2)
  }
  50% {
    border-color: rgba(50,255,50,.2)
  }
  75% {
    border-color: rgba(50,255,255,.2)
  }
  100% {
    border-color: rgba(50,50,255,.2)
  }
}

@keyframes border-top {
  0% {
    border-top-color: #ff0000
  }
  25% {
    border-top-color: #00ff00
  }
  50% {
    border-top-color: #0000ff
  }
  75% {
    border-top-color: #00ff00
  }
  100% {
    border-top-color: #ff0000
  }
}