preloader style

style.scss

.preloader {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: $darkGray;
  z-index: 9999999999;
  -webkit-transition: all 1s linear;
  transition: all 1s linear;
  visibility: visible;
  &.done{
    opacity: 0;
    visibility: hidden;
  }
}

.loader {
  width: 75px;
  height: 75px;
  border: 10px solid #fff;
  border-radius: 50%;
  border-top-color: $red;
  position: absolute;
  left: 50%;
  top: 50%;
  -webkit-transform: translate(-50%, -50%);
          transform: translate(-50%, -50%);
  -webkit-animation: 1s spin infinite linear;
          animation: 1s spin infinite linear;
}

@-webkit-keyframes spin{
  from{
    -webkit-transform: translate(-50%, -50%) rotate(0deg);
            transform: translate(-50%, -50%) rotate(0deg);
  }
  to{
    -webkit-transform: translate(-50%, -50%) rotate(360deg);
            transform: translate(-50%, -50%) rotate(360deg);
  }
}

@keyframes spin{
  from{
    -webkit-transform: translate(-50%, -50%) rotate(0deg);
            transform: translate(-50%, -50%) rotate(0deg);
  }
  to{
    -webkit-transform: translate(-50%, -50%) rotate(360deg);
            transform: translate(-50%, -50%) rotate(360deg);
  }
}